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2017年第7期

时间:2017-07-11 14:52:29??来源:??作者:

基于HAS的分布式供应链仿真建模方法研究idgag8879环亚手机|首页主页

王剑1,2,黄洋1,2idgag8879环亚手机|首页主页

1.华中科技大学自动化学院,湖北 武汉 4300742.“图像信息处理与智能控制教育部重点实验室,湖北 武汉 430074idgag8879环亚手机|首页主页

摘要:基于HLA(High Level Architecture)SCOR(Supply Chain Operation Reference)模型的分布式供应链仿真建模方法存在一些不足之处,这些不足之处导致系统仿真建模的开发效率和联邦成员内部仿真对象的重用性较低。为解决上述问题,根据基于HLASCORAgent的建模方法的特点,提出了基于HAS(HLA-Agent-SCOR)的分布式供应链仿真建模方法。讨论用于构建供应链结构模型的基于HLA的供应链结构建模;集成SCOR业务流程的Agent实体建模和基于Agent的联邦成员建模,用于构建供应链成员模型;进行案例仿真,验证基于HAS的分布式供应链仿真建模方法的可行性。idgag8879环亚手机|首页主页

关键词:供应链;分布式;HLAagentSCOR;仿真建模idgag8879环亚手机|首页主页

中图分类号:TP391.9????? 文献标识码:A?????? 文章编号:1004-731X (2017) 07-1387-10idgag8879环亚手机|首页主页

DOI: 10.16182/j.issn1004731x.joss.201707001idgag8879环亚手机|首页主页

Simulation Modeling Method of Distributed Supply Chain Based on HASidgag8879环亚手机|首页主页

Wang Jian1,2, Huang Yang1,2idgag8879环亚手机|首页主页

(1.School of Automation, Huazhong University of Science and Technology, Wuhan 430074, China; 2. Key Laboratory for Image Information Processing and Intelligent controlling of Ministry of Education, Wuhan 430074, China)idgag8879环亚手机|首页主页

Abstract: There are some shortcomings in simulation modeling method of distributed supply chain based on High Level Architecture (HLA) and Supply Chain Operation Reference (SCOR), which result in low development efficiency of system simulation modeling and low reusability of simulation objects inside the federates. To solve the problems, a simulation modeling method of distributed supply chain based on HAS(HLA-Agent-SCOR) was put forward. The supply chain structure modeling based on HLA for building structure model of supply chain was discussed. Modeling of Agent blocks integrating processes from SCOR and modeling of federates based on Agent were illustrated to create model of supply chain members. A simulation example is given and the feasibility of simulation modeling method of distributed supply chain based on HAS was verified.idgag8879环亚手机|首页主页

Keywords: supply chain; distributed; HLA; agent; SCOR; simulation modelingidgag8879环亚手机|首页主页

※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※idgag8879环亚手机|首页主页

基于PSO和三次样条插值的多机器人全局路径规划idgag8879环亚手机|首页主页

强宁1,高洁1,康凤举2idgag8879环亚手机|首页主页

1.陕西师范大学物理学与信息技术学院,西安 7101192.西北工业大学航海学院,西安 710072idgag8879环亚手机|首页主页

摘要:在自由空间下粒子群算法(Particle Swarm OptimizationPSO)求解机器人路径规划问题时,存在易早熟、编码维度高和路径不平滑等问题,为此提出了一种基于PSO和三次样条插值的路径规划方法。所设计的粒子编码为环境中若干个路径节点的坐标,路径节点的个数决定了样条曲线的个数同时也决定了路径转向的次数。通过3次样条函数对路径的起点、路径节点和终点进行插值,从而得到一条由插值点构成的路径。仿真结果表明,相比传统方法所提出的算法能快速找到平滑的最优路径,并且能为多个机器人规划出最优的无碰路径。idgag8879环亚手机|首页主页

关键词:粒子群算法;三次样条;多机器人;路径规划idgag8879环亚手机|首页主页

中图分类号:TP391.9?? ??????文献标识码:A?????? 文章编号:1004-731X (2017) 07-1397-08idgag8879环亚手机|首页主页

DOI: 10.16182/j.issn1004731x.joss.201707002idgag8879环亚手机|首页主页

Multi-Robots Global Path Planning Based on PSO Algorithm and Cubic Splineidgag8879环亚手机|首页主页

Qiang Ning1, Gao Jie1, Kang Fengju2idgag8879环亚手机|首页主页

(1. School of Physics and Information Technology, Shaanxi Normal University, Xi’an 710119, China; 2. School of Marine Science and Technology, Northwestern Polytechnical University, Xi’an 710072, China)idgag8879环亚手机|首页主页

Abstract: There are shortcomings such as premature convergence, high encoding dimension and unsmooth path for particle swarm optimization (PSO) algorithm to solve the robot path planning problem under free space. The particle coding is coordinates of several path nodes in the environment. The number of spline curves and the maximum turnings of path were determined by the number of path nodes. The cubic spline function was used to interpolate on the path of the starting point, path nodes and target point, thus a full path which was formed by connecting all interpolation points was obtained. Simulation results show that compared with the traditional methods, the proposed algorithm can quickly find the optimal path, and can plan the optimal collision free path for multi-robots.idgag8879环亚手机|首页主页

Keywords: particle swarm optimization algorithm; cubic spline; multi-robots; path planningidgag8879环亚手机|首页主页

※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※idgag8879环亚手机|首页主页

Marching Cubes改进算法及其气象三维模拟idgag8879环亚手机|首页主页

毕硕本,陆源,曾晓文,路明月,张永华idgag8879环亚手机|首页主页

(南京信息工程大学地理与遥感学院, 南京 210044)idgag8879环亚手机|首页主页

摘要:用三等分体元边界的方法取代了原始Marching Cubes算法中通过线性插值获得等值面与体元交点的方法,该方法不仅解决了线性插值不适用于气象数据模拟的问题,还有效地减少了等值面绘制过程中生成的三角面片的数量,在减少冗余提高绘制速度的同时也进一步提高了等值面图像绘制的质量。将改进之后的Marching Cubes算法应用在对气象模式数据即WRF数据的等值面模拟中,在图像绘制速度和绘制质量上均取得了不错的实验效果。idgag8879环亚手机|首页主页

关键词:Marching Cubes算法;等值面;三维模拟;WRFidgag8879环亚手机|首页主页

中图分类号:TP391.9 ??????文献标识码:A?????? 文章编号:1004-731X (2017) 07-1405-07idgag8879环亚手机|首页主页

DOI: 10.16182/j.issn1004731x.joss.201707003idgag8879环亚手机|首页主页

Improved Marching Cubes Algorithm and Its Three-dimensional Meteorological Simulationidgag8879环亚手机|首页主页

Bi Shuoben, Lu Yuan, Zeng Xiaowen, Lu Mingyue, Zhang Yonghuaidgag8879环亚手机|首页主页

(School of Geography & Remote Sensing, Nanjing University of Information Science and Technology, Nanjing 210044, China)idgag8879环亚手机|首页主页

Abstract: Method of obtaining intersection points of isosurface and vowex by linear interpolation in original Marching Cubes algorithm has been replaced by the method of trisecting element boundaries. The problem of linear interpolation not suitable for meteorological data simulation is therefore solved and the number of triangular facets in isosurfacemapping is effectively reduced. While reducing redundancy and improving mapping speed, the quality of isosurface mapping is further improved. The improved Marching Cubes algorithm is applied to the simulation of meteorological model data, i.e., the isosurface of WRF data, and good results are obtained in both the speed of image rendering and the quality of rendering.idgag8879环亚手机|首页主页

Keywords: marching cubes algorithm; isosurface; three-dimensional simulation; WRFidgag8879环亚手机|首页主页

※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※idgag8879环亚手机|首页主页

基于Kinect的树运动轨迹获取与振动频率分析idgag8879环亚手机|首页主页

何鹏1,胡少军1,何东健2*idgag8879环亚手机|首页主页

1. 西北农林科技大学信息工程学院,杨陵 7121002. 西北农林科技大学机械与电子工程学院,杨陵 712100idgag8879环亚手机|首页主页

摘要:探索了一种低成本室外树复杂运动捕获方法,分析了树枝干运动与外力作用的关系采用Kinect V2捕获树枝干运动;基于MeanShift算法跟踪树枝干标记点并依据Kinect坐标转换原理提取树枝干三维运动轨迹;提出了一种用相对偏转角度量树枝干运动的方法,对偏转角度时域信号通过FFT变换获得频域信号。实验结果表明,树枝干在外力作用下的运动轨迹是近似环形的周期运动;树在不同外力作用下均以固定频率振动;同一类型树树形结构不同,其振动频率存在差异。idgag8879环亚手机|首页主页

关键词:树枝干运动;运动捕获;运动轨迹;振动频率;Kinectidgag8879环亚手机|首页主页

中图分类号:TP391.9????? 文献标识码:A?????? 文章编号:1004-731X (2017) 07-1411-08idgag8879环亚手机|首页主页

DOI: 10.16182/j.issn1004731x.joss.201707004idgag8879环亚手机|首页主页

Trajectory Capture and Sway Frequency Analysis of Trees Based on Kinectidgag8879环亚手机|首页主页

He peng1, Hu Shaojun1, He Dongjian2*idgag8879环亚手机|首页主页

(1. College of Information Engineering, Northwest A&F University, Yangling 712100, China; 2. College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling 712100, China)idgag8879环亚手机|首页主页

Abstract: The morphology and structure of plants were complex. It is of great significance to investigate the inherent motion law of plants under the action of external force, such as realistic animation formation, plant pruning, vibration picking and forest protection. A low cost outdoor tree complex motion capture method was explored, and the relationship between the stem motion and the external force was analyzed. The Kinect was used to capture the branches motion; MeanShift algorithm was used for tracking branches markers and the three-dimensional trajectory of the trunk was extracted according to the principle of Kinect coordinate transformation. A method of measuring the motion of a branch with relative deflection angle was proposed, and the frequency domain signal was obtained by the FFT transform of the deflection angle signal in time domain. Experimental results show that the trajectory of the tree trunk and branches under the action of external force is periodic motion of approximate circular; the sway frequencies of the trees under various external forces are almost same. Extra experiments indicate that there are differences in the sway frequency of the same tree with different tree structure.idgag8879环亚手机|首页主页

Keywords: tree branch motion; motion capture; trajectory; sway frequency; Kinectidgag8879环亚手机|首页主页

※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※idgag8879环亚手机|首页主页

远距离空间增强现实系统的设计与实现idgag8879环亚手机|首页主页

葛水英1,刘书曼1,徐士彪2,张晓鹏2idgag8879环亚手机|首页主页

1.中国科学院文献情报中心,北京 1001902.中国科学院自动化研究所,北京 100190idgag8879环亚手机|首页主页

摘要:为扩展增强现实中标识物识别的距离,利用OpenCVOpenGL以及Kinect API构建基于深度传感器的远距离跟踪注册技术,开发了基于PC平台的远距离增强现实系统。Kinect结合摄像头构成追踪系统,改进了一般摄像头在远距离识别所存在的不足,实现了人机交互的增强现实。通过对姿态标定模块、无标记虚实注册模块、自然交互模块等主要功能模块实现的描述。实验验证了该系统的实时性、稳定性和有效性,同时该系统为增强现实无法远距离识别的问题提供了一种解决方案idgag8879环亚手机|首页主页

关键词:空间增强现实;远距离无标记注册;远距离系统平台;自然交互idgag8879环亚手机|首页主页

中图分类号:TP399????? 文献标识码:A?????? 文章编号:1004-731X (2017) 07-1419-08idgag8879环亚手机|首页主页

DOI: 10.16182/j.issn1004731x.joss.201707005idgag8879环亚手机|首页主页

Design and Implementation of Spatial Augmented Reality in Large Sceneidgag8879环亚手机|首页主页

Ge Shuiying1, Liu Shuman1, Xu Shibiao2, Zhang Xiaopeng2idgag8879环亚手机|首页主页

(1. National Science Library, Chinese Academy of Sciences, Beijing 100190, China; 2. Institute of Automation, Chinese Academy of Sciences, Beijing 100190, China)idgag8879环亚手机|首页主页

Abstract: To get long distance marker recognition in Augmented Reality, three software development toolkits were used to construct the long distance marker-less registration technology based on depth sensor, and develop a new augmented reality system based on PC platform. The tracking system was constructed by Kinect and camera. Defects in the single camera tracking system for long distance tracking were improved, and human-computer interaction in Augmented Reality was realized. By the detailed description of the main function modules, such as position calibration module, maker-less virtual-real registration module, and natural interaction module, the system design concept was introduced. Experiment results show that the system can provide real-time, stable and effective performance, and solve the long distance recognition issue.idgag8879环亚手机|首页主页

Keywords: spatial augmented reality; long distance marker-less registration; long distance system platform; natural interactionidgag8879环亚手机|首页主页

※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※idgag8879环亚手机|首页主页

基于道路边界alpha-map的真实感道路实时绘制技术idgag8879环亚手机|首页主页

杜金莲,尚鑫,赵枫朝idgag8879环亚手机|首页主页

(北京工业大学计算机学院,北京 100124)idgag8879环亚手机|首页主页

摘要:针对传统基于缓冲区机制的道路绘制方法存在的模糊和锯齿问题进行研究,提出基于道路边界alpha-map的真实感道路实时绘制方法。该方法基于规则格网地形模型,通过分析利用缓冲区机制生成的道路模型边界网格的构成及特点,设计道路的边缘表达,并基于此设计3种类型的道路边界alpha-map用以生成具有实际视觉效果的道路边缘。实验表明:该方法能够消除传统方法产生的锯齿和模糊现象,很好的实现道路与地表其它区域的平滑过渡,提高了绘制的真实感。该方法的另一优点在于alpha-map的数量与地形的大小以及道路的长短和宽窄无关idgag8879环亚手机|首页主页

关键词:真实感绘制;3D路建模;实时绘制;三维仿真idgag8879环亚手机|首页主页

中图分类号:TP301?????? 文献标识码:A?????? 文章编号:1004-731X (2017) 07-1428-08idgag8879环亚手机|首页主页

DOI: 10.16182/j.issn1004731x.joss.201707006idgag8879环亚手机|首页主页

Realistic Real-time Road Rendering Technology Based on Road Boundaryalpha-mapidgag8879环亚手机|首页主页

Du Jinlian, Shang Xin, Zhao Fengchaoidgag8879环亚手机|首页主页

(Computer Science College of Beijing University of Technology, Beijing 100124, China)idgag8879环亚手机|首页主页

Abstract: A method of realistic real-time rendering based on road boundary alpha-map was proposed to eliminate the blur and aliasing issues produced by traditional rendering method based on buffer mechanism. In the method, the road was generated by buffer mechanism based on grid model of terrain, and the road’s borders were constructed by analyzing the characteristics of road boundary grids. Based on these, three types of road boundary alpha-maps were designed for producing the road borders with realistic visual effects. Experiment shows that the method can improve the rendering realism of the road borders than traditional method. Another advantage of the method is that the number of alpha-map has nothing to do with the terrain size as well as the length and width of road.idgag8879环亚手机|首页主页

Keywords: realistic rendering; 3D road modeling; real-time rendering; three dimensional simulationidgag8879环亚手机|首页主页

※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※idgag8879环亚手机|首页主页

城市新移民社会心理适应的突变仿真研究idgag8879环亚手机|首页主页

赵旭1,黄传超2,胡斌2idgag8879环亚手机|首页主页

1. 三峡大学经济与管理学院,湖北 宜昌 4430022. 华中科技大学管理学院,湖北 武汉 430074idgag8879环亚手机|首页主页

摘要:在异质性移民心态恢复和适应行为转化分析的基础上,构建了城市新移民心理行为的双系统决策模型,并通过设计特定的人工社会环境,结合随机突变理论对新移民的心理适应机制进行模拟研究。结果表明,持续承压时间和政策制度会导致新移民心理适应过程的波动,但前者的影响更为显着。在适应心理到适应行为的转化中,新移民自身的态度倾向和心理认知水平是至关重要的,外界环境则影响该过程的持续时间及程度。政府要根据移民社会心理排斥的预警区和控制路径制定帮扶措施,一旦新移民选择抗拒逃离,则要付出更高的政策成本才能让该群体重新融入。idgag8879环亚手机|首页主页

关键词:城市新移民;社会心理适应;认知水平;仿真突变分析idgag8879环亚手机|首页主页

中图分类号:TP319.9; C931????? 文献标识码:A?????? 文章编号:1004-731X (2017) 07-1435-12idgag8879环亚手机|首页主页

DOI: 10.16182/j.issn1004731x.joss.201707007idgag8879环亚手机|首页主页

Simulation on Psychosocial Adaption of Urban New Migrants Based on Catastrophe Theoryidgag8879环亚手机|首页主页

Zhao Xu1, Huang Chuanchao2, Hu Bin2idgag8879环亚手机|首页主页

(1.College of Economic & Management, China Three Gorges University, Yichang 443002, China; 2. School of Management, Huazhong University of Science and Technology, Wuhan 430074, China)idgag8879环亚手机|首页主页

Abstract: Based on the mental recovery and adaptive behavior translation of the new urban migrants, a two system decision-making model for psychological adaption was built. The simulation research of psychosocial adaption process was studied through the stochastic catastrophe theory and the specific artificial social environment. Simulation experiments indicate that the sustained pressure-bearing suffers from outside situation and the policy system result in the fluctuation of migrants’ psychosocial adaption with the former more significant. In the translation of adaptive psychology to adaptive behavior, the attitude orientation and psychological cognition of migrants are critical. The duration or degree of the adaptive process is influenced by outside pressure. The government must work out support measures according to the alerting area and control paths of psychological repellence. Once the opt-out of the cities are chosen by the urban new migrants, the extra policy costs have to be paid by the government to achieve the objective of migrants’ reintegration.idgag8879环亚手机|首页主页

Keywords: new urban migrants; psychosocial adaption; cognitive level; simulation analysis of catastropheidgag8879环亚手机|首页主页

※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※idgag8879环亚手机|首页主页

三电平逆变器多故障模式识别方法idgag8879环亚手机|首页主页

沈艳霞,吴娟,赵芝璞,纪志成idgag8879环亚手机|首页主页

(江南大学物联网工程学院 电气自动化研究所,江苏 无锡 214122)idgag8879环亚手机|首页主页

摘要:以二极管中点钳位型三电平逆变器为例,分析了三电平逆变器单管开路和多管同时开路故障状态下的相电流和桥臂电压信号,提出了基于相空间重构和小波包分析的三电平逆变器故障识别方法。利用相空间重构技术,对相电流进行重构,得到表征系统故障特征的不同形状、大小和方向的电流轨迹图形,借助图像处理技术识别出相电流不同的各类故障;对相电流相同的不同故障模式辅以小波包分析,提取出桥臂电压的特征频谱,识别出三电平逆变器的所有典型故障。仿真与实验结果表明该方法可以精确提取出各故障状态的特征向量,实现多种故障模式的识别。idgag8879环亚手机|首页主页

关键词:三电平逆变器;故障识别;相电流;桥臂电压;相空间重构;小波包分析idgag8879环亚手机|首页主页

中图分类号:TM464??????? 文献标识码:A???????? 文章编号:1004-731X (2017) 07-1447-11idgag8879环亚手机|首页主页

DOI: 10.16182/j.issn1004731x.joss.201707008idgag8879环亚手机|首页主页

Multiple Faults Identification of Three-level Inverteridgag8879环亚手机|首页主页

ShenYanxia, Wu Juan, Zhao Zhipu, Ji Zhichengidgag8879环亚手机|首页主页

(Institute of Electrical Automation, College of Internet of things Engineering, Jiangnan University, Wuxi 214122, China)idgag8879环亚手机|首页主页

Abstract: A three-level neutral point clamped (NPC) inverter was taken as an example, phase current and bridge voltage in the fault states of single switch open and several switches open at the same time were analyzed, and a method based on reconstructive phase space (RPS) and wavelet packet analysis was proposed to identify three-level inverter faults. Based on RPS method, totally different reconstructed current trajectories were obtained, which showed the features of the inverter under different fault conditions. With the help of image processing technology, all kinds of faults with different phase currents were identified. The wavelet packet analysis was adopted to extract the features of frequency-spectrum for different faults with the same phase currents and all typical faults were identified. Simulations and experiments show that the method can accurately extract the feature vectors for each fault condition and various failure modes can be identified.idgag8879环亚手机|首页主页

Keywords: three-level inverter; fault identification; phase current; bridge voltage; reconstructive phase space; wavelet packet analysisidgag8879环亚手机|首页主页

※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※idgag8879环亚手机|首页主页

基于改进GA-BP网络的系泊缆力预测建模与仿真idgag8879环亚手机|首页主页

李世峰1,邱占芝1,2idgag8879环亚手机|首页主页

(1. 大连交通大学机械工程学院,大连 1160282. 大连交通大学软件学院,大连 116028)idgag8879环亚手机|首页主页

摘要:针对大型开敞式码头系靠泊安全保障和预警控制需求,研究了一类基于遗传算法和BP网络的系泊船舶缆力预测模型。考虑影响系泊缆力的环境动力因素,使用权值统计法确定了预测模型的结构;利用个体父代信息和当代个体的局部梯度信息对预测模型的学习方法进行了改进;基于改进的预测模型,提出了大型开敞式码头系泊船舶缆力预测方法。仿真结果表明:改进后的系泊船舶缆力预测模型在进化代数、最大适应度和预测精度等方面的性能均有所提高,且预测误差均值低于10%,满足实际需求。idgag8879环亚手机|首页主页

关键词:系泊缆力预测;BP网络;遗传算法;建模与仿真idgag8879环亚手机|首页主页

中图分类号:TP301.6????? 文献标识码:A?????? 文章编号:1004-731X (2017) 07-1457-07idgag8879环亚手机|首页主页

DOI: 10.16182/j.issn1004731x.joss.201707009idgag8879环亚手机|首页主页

Modeling and Simulation of Mooring Force Prediction Based on Improved GA-BP Networkidgag8879环亚手机|首页主页

Li Shifeng1, Qiu Zhanzhi1,2idgag8879环亚手机|首页主页

(1. Mechanical Engineering Inst, Dalian Jiaotong University, Dalian 116028, China; 2. Software Technology Inst, Dalian Jiaotong University, Dalian 116028, China)idgag8879环亚手机|首页主页

Abstract: According to the mooring security and early warning control requirement of the large open sea terminal, a ship mooring force prediction model based on genetic algorithm and BP network was studied. Environmental dynamic factors were considered and a model structure was determined by a weight statistics method; the learning method was improved by individual parent information and contemporary individual local gradient information; according to the improved model, a ship mooring force prediction method of the open sea terminal was proposed. The simulation results show that the performance of the prediction model has improved in the iteration number, the largest fitness and prediction accuracy. The average error is less than 10% which satisfies the actual demand well.idgag8879环亚手机|首页主页

Keywords: mooring force prediction; BP network; genetic algorithm; modeling and simulationidgag8879环亚手机|首页主页

※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※idgag8879环亚手机|首页主页

CRAHNs中干扰和能耗有效的联合功率控制路由算法仿真研究idgag8879环亚手机|首页主页

邝祝芳1,2,陈志刚2idgag8879环亚手机|首页主页

(1. 中南林业科技大学计算机与信息工程学院长沙 4100042. 中南大学软件学院长沙 410083)idgag8879环亚手机|首页主页

摘要:针对认知无线Ad Hoc网络(Cognitive Radio Ad Hoc Networks, CRAHNs)下垫式(Underlay)频谱接入模型,次用户节点对主用户干扰功率过高,以及次用户节点能量过早耗尽的问题,提出了基于粒子群优化算法的联合功率控制的路由与频谱分配算法PRSA,以最小化次用户对主用户的干扰功率与延长网络生存时间为目标,包括粒子编码与粒子初始化、适应度函数、粒子飞行。设计了包含信道与发射功率等级二元组的邻接矩阵粒子编码结构,以及重新定义了粒子的3种运算规则。仿真结果表明,PRSA能在最小化对主用户的干扰功率的同时,延长网络生存时间。idgag8879环亚手机|首页主页

关键词:认知无线Ad Hoc网络;路由;干扰;能耗有效idgag8879环亚手机|首页主页

中图分类号:TP393???????? 文献标识码:A??????? 文章编号:1004-731X (2017) 07-1464-08idgag8879环亚手机|首页主页

DOI: 10.16182/j.issn1004731x.joss.201707010idgag8879环亚手机|首页主页

Simulation of Joint Power Control Routing Algorithm for Interference and Energy Consumption in CRAHNsidgag8879环亚手机|首页主页

Kuang Zhufang1,2, Chen Zhigang2idgag8879环亚手机|首页主页

(1.School of Computer and Information Engineering, Central South University of Forestry & Technology, Changsha 410004, China; 2. School of Software, Central South University, Changsha 410083, China)idgag8879环亚手机|首页主页

Abstract: Problems of interference power to primary user by secondary userand the secondary user’s running out of energy under underlay spectrum access model in cognitive radio ad hoc networks (CRAHNs) were investigated. Joint power control, routing and spectrum (channel) allocation algorithm (PRSA) based on particle swarm optimization were proposed. The goal of PRSA was to minimize interference power to primary user and prolong lifetime of CRAHNs. Particle encoding, particle initialization, fitness function, particle flight were included in PRSA. An Adjacency matrix with two-tuples containing allocated channel and power level was designed, and three operation rules for particle were redefined. Simulation results show that PRSA can achieve the expected goal, minimize the interference power to primary user, and prolong the network lifetime.idgag8879环亚手机|首页主页

Keywords: cognitive radio ad hoc networks; routing; interference; energy efficientidgag8879环亚手机|首页主页

※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※idgag8879环亚手机|首页主页

无阀控液压冲击系统改进设计方案及仿真分析idgag8879环亚手机|首页主页

刘忠1,2,邹宇2,张凯2,赵飞3,刘军军3idgag8879环亚手机|首页主页

(1. 桂林航天工业学院机械工程学院,广西 桂林 5410042. 中国矿业大学机电工程学院,江苏 徐州 2211163. 常熟理工学院机械工程学院,江苏 苏州 215500idgag8879环亚手机|首页主页

摘要:针对阀控式液压冲击系统的换向过程的能量损失缺陷,提出了一种无阀控液压冲击系统结构原理,建立了其动力学方程,利用AMESim软件进行了仿真分析。根据仿真结果与设计目标的误差,提出采用增加节流装置和控制进、出油路两种方案。仿真结果表明,采用增加节流装置时且节流孔径为6.5 mm时,其工作效率由11.8%提高到18.3%;采用控制进、出油路方案,其工作效率由11.8%提高到26.4%,冲击系统改善效果明显,达到了预期设计目标,该研究为液压冲击系统的设计和理论研究提供了技术参考。idgag8879环亚手机|首页主页

关键词:无阀控液压冲击系统;改进设计;节流装置;双油路;仿真idgag8879环亚手机|首页主页

中图分类号:TU63+1; TP391.9????? 文献标识码:A?????? 文章编号:1004-731X (2017) 07-1472-09idgag8879环亚手机|首页主页

DOI: 10.16182/j.issn1004731x.joss.201707011idgag8879环亚手机|首页主页

Improved Design Scheme and Simulation Analysis of Non-valve Controlled Hydraulic Impact Systemidgag8879环亚手机|首页主页

Liu Zhong1,2, Zou Yu2, Zhang Kai2, Zhao Fei3, Liu Junjun3idgag8879环亚手机|首页主页

1.School of Mechanical Engineering, Guilin University Of Aerospace Technology, Guilin 541004, China; 2.School of Mechatronic Engineering, China University of Mining and Technology, Xuzhou 221116, China; 3.School of Mechanical Engineering, Changshu Institute of Technology, Suzhou 215500, Chinaidgag8879环亚手机|首页主页

Abstract: Due to valve port commutation of traditional hydraulic impact system caused valve leakage. For the above shortcomings, an improved structure principle of the new type of non-valve controlled hydraulic impact system was proposed establishing dynamic equations of impact system andconducting simulation analysis based on AMESim. Due to the simulation results which was inconsistent with design goal, two improvement schemes were proposed adding throttle device and controlling inlet and outlet circuit. The simulation results suggest that the working performance of impact system has been improved by adding throttle device, and its efficiency has been increased from 11.8% to 18.3% when the diameter of orifice is 6.5mm; its efficiency has been increased from 11.8% to 26.4% by controlling inlet and outlet circuit, the improving effect is very significant, and it achieves the expected design goals. The study of the improved design scheme of non-valve controlled hydraulic impact system provides technical reference for the design and theoretical research of hydraulic impact system.idgag8879环亚手机|首页主页

Keywords: non-valve controlled hydraulic impact system; improved design; throttle device; double-circuit; simulationidgag8879环亚手机|首页主页

※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※idgag8879环亚手机|首页主页

采煤机机身联接螺栓强度分析与疲劳寿命仿真idgag8879环亚手机|首页主页

郝志勇1,雷耀龙1,毛君1,袁智2idgag8879环亚手机|首页主页

1.辽宁工程技术大学机械工程学院,辽宁 阜新 1230002.中国煤矿机械装备有限责任公司,北京 100011idgag8879环亚手机|首页主页

摘要:结合采煤机力学特性测试实验,使用合并未知量,多次求解的方式对采煤机左牵引部空间力学模型超定方程进行求解获得机身联接螺栓剪切载荷谱;利用获得的机身联接螺栓剪切载荷谱进行功率谱密度分析,使用雨流计数法对载荷谱进行编制,获得载荷谱频域特性与时域连续特性;结合螺栓载荷谱,通过静载分析与疲劳仿真分析,并考虑间隙影响条件,分析结果显示螺栓剪切疲劳起裂区域为螺纹配合起始部分,疲劳寿命约为5 625.68 h;仿真结果证明,在一定条件下仿真模拟可以达到反映真实条件下采煤机螺栓剪切疲劳损伤演化过程的目的idgag8879环亚手机|首页主页

关键词:采煤机;机身联接螺栓;实验测试;疲劳寿命idgag8879环亚手机|首页主页

中图分类号:TD421??????? 文献标识码:A?????? 文章编号:1004-731X (2017) 07-1481-08idgag8879环亚手机|首页主页

DOI: 10.16182/j.issn1004731x.joss.201707012idgag8879环亚手机|首页主页

Intensity Analysis and Fatigue Life Simulation for Connecting Bolt of Shearer Machine Bodyidgag8879环亚手机|首页主页

Hao Zhiyong1, Lei Yaolong1, Mao Jun1, Yuan Zhi2idgag8879环亚手机|首页主页

(1. Mechanical Engineering College of Liaoning Technical University, Fuxin 123000, China; 2. China National Coal Mining Equipment Company, Beijing 100011, China)idgag8879环亚手机|首页主页

Abstract: To obtain the cutting load spectrum of themachine body connecting bolt, the method of merging unknown quantities and multi calculation combined with the test experiments of shear mechanical properties was used to solve the overdetermined equations of shearer left haulage unit spatial mechanical model The cutting load spectrum of the machine body connecting bolt was taken to run PSD analysis, and the rainflow counting method was used to script the load spectrum. The frequency domain characteristics and time domain continuation characteristics were therefore obtained. The static analysis and fatigue life simulation analysis combined with the bolt load spectrum and the consideration of the impact condition of clearance, indicate that the initial cracking region for bolt cutting fatigue is the preliminary part of the threaded fit, the fatigue life of machine body connecting bolt is 5 625.68 hours. The simulation results show that under specific conditions the simulation can reach the goal of reflecting the cutting fatigue damage evolutionary process of the connecting bolt of shearer machine under real conditions.idgag8879环亚手机|首页主页

Keywords: shearer; connecting bolt of machine body; testing experiment; fatigue lifeidgag8879环亚手机|首页主页

※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※idgag8879环亚手机|首页主页

无交流电压传感器的三相变流器模型预测控制idgag8879环亚手机|首页主页

李辉1,2,李志1章兢1,彭寒梅1idgag8879环亚手机|首页主页

(1. 湘潭大学信息工程学院,湖南 湘潭 4111052. 海上风力发电技术与检测国家重点实验室,湖南 湘潭 411102)idgag8879环亚手机|首页主页

摘要:传统的三相变换器模型预测控制(MPC)需采用交流电动势传感器,从而降低了系统可靠性。提出了无交流电动势传感器的三相变流器模型预测控制,通过直流母线电压、开关信号和交流电流构建虚拟磁链观测器,建立了基于虚拟磁链定向的三相变流器模型预测控制二次规划数学模型(QP-MPC),利用二次规划算法使系统快速计算出最优变化量,最小化目标函数,得出最优的开关管控制信号,从而优化系统性能。仿真验证了所提控制策略的有效性。idgag8879环亚手机|首页主页

关键词:变流器;二次规划;模型预测控制;龙伯格观测器idgag8879环亚手机|首页主页

中图分类号:TM862????? 文献标识码:A?????? 文章编号:1004-731X (2017) 07-1489-08idgag8879环亚手机|首页主页

DOI: 10.16182/j.issn1004731x.joss.201707013idgag8879环亚手机|首页主页

Study of Model Predictive Control of PWM Voltage Source Converter without AC Electromotive Force Sensoridgag8879环亚手机|首页主页

Li Hui1,2, Li Zhi1, Zhang Jin1, Peng Hanmei1idgag8879环亚手机|首页主页

(1. College of Information Engineering of Xiangtan University, Xiangtan 411105, China; 2. State Key Laboratory of Offshore Wind-power Technology and Testing, Xiangtan 411102, China)idgag8879环亚手机|首页主页

Abstract: The traditional model-predictive-control (MPC), applied to three-phase converter, requires to use AC electromotive force sensor, and then it reduces the system reliability. A three-phase converter model predictive control without AC electromotive force sensor was proposed, and the virtual flux observer was constructed by DC bus voltage, switching signal and AC current. On this basis, a mathematical model of three-phase converter model predictive control quadratic programming (QP-MPC) based on virtual flux oriented was established. Using quadratic programming algorithm, the system can quickly calculate the optimal change, minimize the objective function, and obtain the optimal switch control signal, so as to optimize the system performance. The simulation results verify the feasibility and effectiveness of the proposed control strategy.idgag8879环亚手机|首页主页

Keywords: converter; quadratic programming; model predictive control; Luenberger observeidgag8879环亚手机|首页主页

※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※idgag8879环亚手机|首页主页

基于改进鸡群算法的柔性作业车间调度问题求解idgag8879环亚手机|首页主页

许世鹏1,吴定会1,2,孔飞1,纪志成1idgag8879环亚手机|首页主页

(1. 江南大学轻工过程先进控制教育部重点实验室,江苏 无锡 2141222. 江苏省食品先进制造装备技术重点实验室,江苏 无锡 214122)idgag8879环亚手机|首页主页

摘要:为求解柔性作业车间调度问题,提出一种改进鸡群算法。以机器的最大完工时间为优化目标建立了柔性作业车间调度模型。提出改进鸡群算法,算法对小鸡的更新公式进行改进,并融合模拟退火算法和动态余弦惯性权重策略的优势,实现了全局搜索和局部探索的有效平衡。对4个标准函数和一个柔性作业车间调度模型进行仿真测试,与标准粒子群算法和鸡群算法相比,最大完工时间的最优值分别减少了127,平均值分别减少了16.35.7,验证了所提算法的有效性和优越性。idgag8879环亚手机|首页主页

关键词:柔性作业车间调度;改进鸡群算法;模拟退火算法;动态余弦idgag8879环亚手机|首页主页

中图分类号:TP391.9??????? 文献标识码:A???????? 文章编号:1004-731X (2017) 07-1497-09idgag8879环亚手机|首页主页

DOI: 10.16182/j.issn1004731x.joss.201707014idgag8879环亚手机|首页主页

Solving Flexible Job-Shop Scheduling Problem by Improved Chicken Swarm Optimization Algorithmidgag8879环亚手机|首页主页

Xu Shipeng1, Wu Dinghui1,2, Kong Fei1, Ji Zhicheng1idgag8879环亚手机|首页主页

(1. Key Laboratory of Advanced Process Control for Light Industry, Jiangnan University, Wuxi 214122, China; 2. Key Laboratory of Advanced Manufacturing Equipment Technology of Food in Jiangsu Province, Wuxi 214122, China)idgag8879环亚手机|首页主页

Abstract: To solve the flexible job-shop scheduling problem (FJSP) more effectively, an improved chicken swarm optimization (ICSO) algorithm was proposed. A flexible job-shop scheduling model was established for the purpose of minimizing the machine makespan. The improved chicken swarm optimization algorithm was presented. Algorithm improved the update formula of chicks and combined the advantages of simulated annealing algorithm and dynamic inertia cosine weight strategy, which achieved an effective balance of global search and local exploration. According to simulating and testing four standard functions and a flexible job shop scheduling model and compared with particle swarm optimization (PSO) and chicken swarm optimization (CSO), makespan of the optimal value of ICSO is reduced by 12 and 7 respectively, and the mean value is reduced by 16.3 and 5.7, validating the effectiveness and the superiority of ICSO.idgag8879环亚手机|首页主页

Keywords: flexible job-shop scheduling; improved chicken swarm optimization algorithm; simulated annealing algorithm; dynamic inertia cosineidgag8879环亚手机|首页主页

※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※idgag8879环亚手机|首页主页

加权动态SVDD在非线性过程监测中的应用研究idgag8879环亚手机|首页主页

谢彦红1,孙呈敖2,李元2idgag8879环亚手机|首页主页

(1. 沈阳化工大学数理系,辽宁 沈阳 1101422. 沈阳化工大学信息工程学院,辽宁 沈阳 110142)idgag8879环亚手机|首页主页

摘要:由于化工过程的复杂性,数据往往存在动态以及序列之间具有相关性特点,传统的支持向量数据描述(Support Vector Data Description, SVDD)方法,很难保证故障监测的准确性和实时性,提出一种基于加权的动态SVDD(WDSVDD)在线实时故障监测方法,引入动态方法,考虑了数据之间的序列相关性,利用加权的方法把有用的信息突出显示,利用SVDD方法建立模型,实现了在线实时故障监测。该方法不仅克服了过程数据非高斯、非线性特性对故障监测带来的影响,并且考虑了数据的动态特性和序列之间的关系,通过在数值仿真和TE过程实例中的应用验证了方法的有效性。idgag8879环亚手机|首页主页

关键词:故障监测;动态;支持向量数据描述;化工过程idgag8879环亚手机|首页主页

中图分类号:TP277????? 文献标识码:A?????? 文章编号:1004-731X (2017) 07-1506-08idgag8879环亚手机|首页主页

DOI: 10.16182/j.issn1004731x.joss.201707015idgag8879环亚手机|首页主页

Application of Weighted Dynamic SVDD in Nonlinear Process Monitoringidgag8879环亚手机|首页主页

Xie Yanhong1, Sun Chengao2, Li Yuan2idgag8879环亚手机|首页主页

(1. Department of Science Shenyang University of Chemical Technology, Shenyang 110142, China; 2. College of Information Engineering Shenyang University of Chemical Technology, Shenyang 110142, China)idgag8879环亚手机|首页主页

Abstract: Due to the complexity of the chemical process, the data are often characterized by dynamics and correlation between sequences. Traditional support vector data description (SVDD) methods are difficult to guarantee real-time monitoring online. A Weighted-Dynamic-SVDD (WDSVDD) method was proposed to monitor fault in real time online. The dynamic method was introduced, and the correlation between the data was considered. The weighted information was used to highlight the useful information. The model was established by using SVDD method, and the online real-time fault monitoring was realized. The method not only overcomes the adverse effect of non-Gaussian and nonlinearity, but also considers dynamic characteristics and correlation between sequences of the processing data. Applications in the numerical simulation and TE process instance verify the effectiveness of the proposed method.idgag8879环亚手机|首页主页

Keywords: faulty monitoring; dynamic; SVDD (support vector data description); chemical processidgag8879环亚手机|首页主页

※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※idgag8879环亚手机|首页主页

RFID系统欠定盲分离的汉明重分组防碰撞算法idgag8879环亚手机|首页主页

金允钢,张小红,王秋丽idgag8879环亚手机|首页主页

(江西理工大学信息工程学院,江西 赣州 341000)idgag8879环亚手机|首页主页

摘要:针对欠定盲源分离RFID(Radio Frequency IDentification)系统在标签数大量增加时产生的系统性能急剧下降等问题,提出了一种基于约束性非负矩阵分解(NMF, Non-negative Matrix Factorization)与汉明重分组技术相结合的多标签防碰撞算法。通过计算阅读器识别范围内标签的IDM位的汉明重量的不同对标签进行分组,RFID系统的阅读器并按照组号的顺序依次识别。实验仿真表明,在天线数相同的情况下,改进算法与跳跃式动态树算法相比,当天线数为8~18时,标签识别率提高了42.8%~169.5%,标签识别速度提高了40.3%~62.9%,在多标签识别领域具有很好的实用性。idgag8879环亚手机|首页主页

关键词:射频识别;欠定盲分离;防碰撞;汉明码;非负矩阵分解idgag8879环亚手机|首页主页

中图分类号:TN911.23 ??????文献标识码:A?????? 文章编号:1004-731X (2017) 07-1514-07idgag8879环亚手机|首页主页

DOI: 10.16182/j.issn1004731x.joss.201707016idgag8879环亚手机|首页主页

Under-determined Blind Source Separation Anti-collision Algorithm for RFID Based on Hamming Weight Groupingidgag8879环亚手机|首页主页

Jin Yungang, Zhang Xiaohong, Wang Qiuliidgag8879环亚手机|首页主页

(School of Information Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China)idgag8879环亚手机|首页主页

Abstract: The results of the algorithm ofunder-determined blind source separation RFID (Radio Frequency IDentification) system become worse or even lead to the degradation of overall system performancewith the large increase in the number of tags. Anovel parallelizable identification anti-collision algorithm based on constrained non negative matrix factorization (NMF) and Hamming weight grouping technology was proposed. The tag groupings were made by calculating the Hamming weight of the tag’s front M bits, which were within the reader identification range. Each group was identified by the RFID reader according to the grouping sequence. Simulation results show that when the antenna number is 8~18, compared with the Jumping and Dynamic Searching algorithmunder the same antenna number, the improved algorithm tag identification rate increased by 42.8%~169.5%, the tag identification speed increased 40.3%~62.9%. It has very good practicability in the field of multi tag identification.idgag8879环亚手机|首页主页

Keywords: RFID; under-determined blind separation; anti-collision; Hamming code; NMFidgag8879环亚手机|首页主页

※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※idgag8879环亚手机|首页主页

基于开关电容的双向DC-DC变换器及其单周期控制idgag8879环亚手机|首页主页

陈磊,潘庭龙,沈艳霞,吴定会,纪志成idgag8879环亚手机|首页主页

(江南大学物联网工程学院电气自动化研究所,江苏 无锡 214122)idgag8879环亚手机|首页主页

摘要:基于开关电容网络串联放电、并联充电工作特点,提出一种实现输入输出电压大变比的双向开关电容网络DC-DC变换器。针对变换器抗输入扰动抑制能力差和动态响应速度慢等问题,提出采用单周期控制结合输出电压反馈补偿控制方法,实现在一个周期内有效抑制输入电压扰动并提高变换器抗负载扰动能力。分析了双向开关电容网络DC-DC变换器的工作原理和控制特性,并对所提电路及其在输入电压、负载以及给定等参数变化时的状态进行实验和仿真研究。结果表明:变换器具有较强的升降压能力;改进单周期控制变换器具有良好的抗扰动能力和更强的鲁棒性。idgag8879环亚手机|首页主页

关键词:开关电容网络;高增益;双向变换;改进单周期控制idgag8879环亚手机|首页主页

中图分类号:TM 464????? 文献标识码:A?????? 文章编号:1004-731X (2017) 07-1521-10idgag8879环亚手机|首页主页

DOI: 10.16182/j.issn1004731x.joss.201707017idgag8879环亚手机|首页主页

Research on One-cycle Controlled Bi-directional DC-DC Converter Based on Switch Capacitor Networkidgag8879环亚手机|首页主页

Chen Lei, Pan Tinglong, Shen Yanxia, Wu Dinghui, Ji Zhichengidgag8879环亚手机|首页主页

(Institute of Electrical Automation, College of Internet of Things Engineering, Jiangnan University, Wuxi 214122, China)idgag8879环亚手机|首页主页

Abstract: According to the switch capacitor network working characteristics of discharging in series, charging in parallel, a high ratio bidirectional DC-DC converter based on switch capacitor network was proposed. In order to improve the converter’s ability of resist input voltage disturbance and dynamic response speed, an improved method was focused on which combined the advantage of one-cycle control and the output voltage feedback compensation control, which could realize inhibition the input voltage perturbation in one cycle and improve the converter’s resistance ability of load disturbance. The operating principle and control characteristics of the new converter were analyzed. The improved one-cycle method was used into the converter to research the input voltage, load and given voltage change cases. Simulation and experiment results show that the new converter has higher transformation ability and the improved one-cycle control improves the converter’s resistance ability of load disturbance and has a good robust.idgag8879环亚手机|首页主页

Keywords: switch capacitor network; high gain; bidirectional DC/DC converter; improved one-cycle controlidgag8879环亚手机|首页主页

※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※idgag8879环亚手机|首页主页

混凝土类材料动态拉伸实验中惯性效应的研究idgag8879环亚手机|首页主页

张书,卢玉斌,赵冬梅,陈兴idgag8879环亚手机|首页主页

(西南科技大学制造科学与工程学院,四川 绵阳 621010)idgag8879环亚手机|首页主页

摘要:目前研究者对于惯性效应在动态拉伸强度中的影响持不同观点,尚没有定论。基于此,利用有限元数值模拟,在不考虑真实应变率效应影响的情况下,采用计及静水压力影响的本构关系模型对动态直接拉伸模型、劈裂实验及层裂实验模型中的试样进行分析。最终发现:混凝土类材料试样由惯性效应产生的动态拉伸强度增强虽然会随着加载应变率的增大而提高,但与相应实验中不同应变率下动态拉伸强度增强的数据相比,其增加量相对实验结果而言很小。因此,惯性效应并不是引起混凝土类材料动态拉伸强度增大的主要原因,其主导因素是真实应变率效应。。idgag8879环亚手机|首页主页

关键词:混凝土类材料;拉伸强度;惯性效应;真实应变率效应;数值模拟idgag8879环亚手机|首页主页

中图分类号:O347.3 ??????文献标识码:A?????? 文章编号:1004-731X (2017) 07-1531-08idgag8879环亚手机|首页主页

DOI: 10.16182/j.issn1004731x.joss.201707018idgag8879环亚手机|首页主页

Inertia Effect in Dynamic Tensile Tests of Concrete-like Materialsidgag8879环亚手机|首页主页

Zhang Shu, Lu Yubin, Zhao Dongmei, Chen Xingidgag8879环亚手机|首页主页

(Southwest University of Science and Technology, School of Manufacturing Science and Engineering, Mianyang 621010, China)idgag8879环亚手机|首页主页

Abstract: The different understanding on the influential degree of the inertial effect does exist among researchers, and it has not been uniformly defined in dynamic tensile tests. The finite element numerical simulation method was employed to analyze the three typical dynamic tensile tests, without considering the real strain-rate effect in these models, where a constitutive model only considered the influence of hydrostatic pressure was used for modeling the specimen in these models. It is found that the dynamic tensile strength of concrete specimens in the three models mentioned is strengthened with the increase of loading strain-rate, owing to the inertial effect, while the increments of dynamic tensile strength obtained from these numerical tests are relatively small, compared with the corresponding experimental data. It means that the real strain-rate effect rather than the inertial effect is the main factor leading to the dynamic tensile strength enhancement of concrete-like materials.idgag8879环亚手机|首页主页

Keywords: concrete-like materials; tensile strength; inertial effect; real strain-rate effect; numerical simulationidgag8879环亚手机|首页主页

※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※idgag8879环亚手机|首页主页

热镀锌锅内锌液流动、传热及组分运输特性分析idgag8879环亚手机|首页主页

孙首群1,韦忠爽1,2,卢华阳2idgag8879环亚手机|首页主页

(1. 上海理工大学机械工程学院,上海 2000932. 上海宝信软件股份有限公司,上海 201900)idgag8879环亚手机|首页主页

摘要:锌渣的产生是连续热镀锌过程中一种必然的冶金行为,影响着镀锌质量。渣体的产生与锌液物理场特性密切相关,除渣不当会引起更多的表面缺陷。通过构建三维粘性标准k双方程湍流模型,根据具体的初始条件与边界条件,求解得到锌锅流域内流动、传热及组分运输规律,确定漩涡分布特性,观察点的仿真计算结果与实验结果基本吻合,证明了计算方法的准确性。通过理论计算可以有效预测锌锅内锌渣的分布规律以及除渣作业危险区,研究结果为热镀工艺的优化及除渣机器人的除渣设计提供理论依据和技术支持。idgag8879环亚手机|首页主页

关键词:热镀锌;流动;传热;组分运输;表面缺陷;除渣idgag8879环亚手机|首页主页

中图分类号:TB24 ???????文献标识码:A??????? 文章编号:1004-731X (2017) 07-1538-08idgag8879环亚手机|首页主页

DOI: 10.16182/j.issn1004731x.joss.201707019idgag8879环亚手机|首页主页

Fluid Flow, Heat and Mass Transfer in Hot Dip Galvanizing Bathidgag8879环亚手机|首页主页

Sun Shouqun1, Wei Zhongshuang1,2, Lu Huayang2idgag8879环亚手机|首页主页

(1. College of Mechanical Engineering, Shanghai 200093, China; 2. Shanghai Baosight Software Co., Ltd., Shanghai 201900, China)idgag8879环亚手机|首页主页

Abstract: Zinc dross is produced inevitably as a metallurgical phenomenon of continuous hot galvanizing process, and the quality of galvanizing is affected. The phenomenon is closely related to the physical field of molten zinc and more surface defects are easily produced if the zinc dross removal process is improperly handled. By constructing a three-dimensional viscous standard k-ε two equation turbulence model, the fluid flow, heat and mass transfer law and the distribution regularities of flow vortex were obtained under the specific initial conditions and boundary conditions. The simulation results of the observation points are basically in agreement with the experimental results, and the accuracy of the calculation method is proved. The theoretical calculation can be used to predict the distribution of zinc dross and operation risk zone of zinc dross removal. The research results provide theoretical basis and technical support for the optimization of hot dip process and dross removal design of dross removal robot.idgag8879环亚手机|首页主页

Keywords: hot dip galvanizing; fluid flow; heat transfer; mass transfer; surface defect; dross removingidgag8879环亚手机|首页主页

※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※idgag8879环亚手机|首页主页

基于比例谐振的高压静止同步发生器RTDS仿真研究idgag8879环亚手机|首页主页

张扬,杨小品idgag8879环亚手机|首页主页

(南昌工程学院,江西 南昌 330099)idgag8879环亚手机|首页主页

摘要:适用于高压直流输电系统的±100 MVar高压静止同步发生器(Static Synchronous Compensator, STATCOM)装置,对可靠性要求较高,控制系统设计需要较高的响应速度来应对金属性接地故障等极限工况。电流直接控制方式较适用于这种情况。研究了直接电流方式下的准谐振控制器,并讨论其参数整定方法。通过数学推导过程说明了关键参数KpKr的计算方法。针对南方电网云南-广西富宁换流站的高压STATCOM参数进行了计算和RTDS仿真。仿真结果表明,该控制方法能够满足10 ms动态响应时间要求,并具备单相金属性接地故障穿越能力,具有一定的工程应用价值。idgag8879环亚手机|首页主页

关键词:参数整定;直接电流控制;分相控制;准谐振控制;RTDS试验;高压STATCOMidgag8879环亚手机|首页主页

中图分类号:TM712????? 文献标识码:A?????? 文章编号:1004-731X (2017) 07-1546-08idgag8879环亚手机|首页主页

DOI: 10.16182/j.issn1004731x.joss.201707020idgag8879环亚手机|首页主页

RTDS Simulation of Quasi-Proportional Resonant Control of STATCOM under High Voltageidgag8879环亚手机|首页主页

Zhang Yang, Yang Xiaopinidgag8879环亚手机|首页主页

(Nanchang Institute of Technology, Nanchang 330099, China)idgag8879环亚手机|首页主页

Abstract: ±100 MVar high voltage static synchronous compensator (STATCOM) device is used for high voltage DC transmission which needs higher reliability. Faster response for its control system to deal with metal ground fault and other situations is required. Direct Current Control (DCC) can be used for these situations. Quasi- Proportional Resonant (quasi-PR) controller under DCC was studied and its parameters settings were discussed. The calculation methods of key parameters such as Kp and Kr were explained by mathematical deduction process. The STATCOM under higher voltage in Yunnan-Guangxi Funing transaction station was taken as an example for the calculation of its parameters and RTDS simulation. Simulation results indicate that this control method satisfies the needs of less than 10ms response time and has single-phase metal ground fault crossing capability. It has certain practical and engineering value.idgag8879环亚手机|首页主页

Keywords: parameters setting; direct current control (DCC); independent phase control (IPC); quasi-proportional resonant control (quasi-PR); RTDS experiment; STATCOM under higher voltageidgag8879环亚手机|首页主页

※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※idgag8879环亚手机|首页主页

电站锅炉烟气余热及水分回收系统仿真研究idgag8879环亚手机|首页主页

王金平,邓煜,李斌,朱瑞idgag8879环亚手机|首页主页

(华北电力大学能源动力与机械工程学院,河北 保定 071003)idgag8879环亚手机|首页主页

摘要:为了进一步提高电厂经济性,提出了锅炉烟气余热及水分回收系统建立了烟气冷却器的数学模型,同时构建了烟气余热及水分回收系统的仿真模型,并将其集成到该机组的仿真系统中并对该系统进行仿真实验,分析了系统的投入对火电机组运行特性的影响。通过阀门扰动实验,研究了余热及水分回收系统的动态特性。结果表明,系统的投入不仅能提高机组经济性,还能够有效的回收烟气中的水分,同时对火电机组运行的稳定性影响不大,在机组原DCS控制系统的调节下,机组能稳定运行。idgag8879环亚手机|首页主页

关键词:余热利用;水分回收;烟气冷却器;动态特性idgag8879环亚手机|首页主页

中图分类号:TK01+9????? 文献标识码:A?????? 文章编号:1004-731X (2017) 07-1553-08idgag8879环亚手机|首页主页

DOI: 10.16182/j.issn1004731x.joss.201707021idgag8879环亚手机|首页主页

Simulation on Waste Heat and Water Recovery System of Flue Gas in Plant Boileridgag8879环亚手机|首页主页

Wang Jinping, Deng Yu, Li Bin, Zhu Ruiidgag8879环亚手机|首页主页

(School of Energy Power and Mechanical Engineering, North China Electric Power University, Baoding 071003, China)idgag8879环亚手机|首页主页

Abstract: To further improve economy of power plant, the waste heat and water recovery system was put forward. The mathematical model of the gas cooler was established, and the simulation model of this system was built. This simulation model was integrated into the simulation system of a 350mw heating unit, and the simulation experiment was carried out. The influences caused by the introduction of the flue gas waste heat and water recovery system to thermal power unit were analyzed. The dynamic characteristics of the flue gas waste heat and water recovery system based on the valve perturbation experiments were studied. The results indicate that the introduction of the flue gas waste heat and water recovery system can not only improve the economy of the unit, but also can effectively recover the moisture in the flue gas. Besides, it has little effect on the operation stability of the thermal power unit, and the stable operation of this unit by the regulation of DCS control system can be realized.idgag8879环亚手机|首页主页

Keywords: flue gas waste heat utilization; moisture recovery; flue cooler; mdynamic characteristicidgag8879环亚手机|首页主页

※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※idgag8879环亚手机|首页主页

基于IDE-LSSVM的风电场短期风速预测idgag8879环亚手机|首页主页

张妍,王东风,韩璞idgag8879环亚手机|首页主页

(华北电力大学自动化系,河北 保定 071003idgag8879环亚手机|首页主页

摘要:为进一步提高风电场短期风速预测精度,提出一种改进的差分进化算法优化的最小二乘支持向量机短期风速预测模型。在改进的差分进化算法中综合了两种变异操作算子,改进了变异因子和交叉概率因子,使其根据进化代数自适应变化,保证了进化初期算法的全局搜索能力和种群多样性,提高了进化算法末期局部搜索精度和收敛速度把改进的差分进化算法用于最小二乘支持向量机的参数寻优,提高了模型的预测精度,并在河北某风电场的真实历史数据集上建立风速预测模型,仿真实验验证了方法的有效性。idgag8879环亚手机|首页主页

关键词:风电场;短期风速预测;最小二乘支持向量机;改进差分进化算法idgag8879环亚手机|首页主页

中图分类号:TM614????? 文献标识码:A?????? 文章编号:1004-731X (2017) 07-1561-11idgag8879环亚手机|首页主页

DOI: 10.16182/j.issn1004731x.joss.201707022idgag8879环亚手机|首页主页

Short-term Prediction of Wind Speed for Wind Farm Based on IDE-LSSVM Modelidgag8879环亚手机|首页主页

Zhang Yan, Wang Dongfeng, Han Puidgag8879环亚手机|首页主页

(Department of Automation, North China Electric Power University, Baoding 071003, China)idgag8879环亚手机|首页主页

Abstract: To improve the prediction accuracy of short-term wind speed for wind farm, an improved differential evolution algorithm was applied to optimize the parameters of least squares support vector machine. Two mutation operators were integrated, and the scale factor and crossover probability factor were changed gradually to adapt to the evolutionary generations. The good global search ability and population diversity in early stage of evolution were ensured, therefore the local search accuracy and the convergence speed in the late stage were enhanced. The forecasting performance of the least squares support vector machine optimized by IDE was improved. Simulation experiments on the historical wind speed data sets in a wind farm of Hebei province show that the proposed model is effective.idgag8879环亚手机|首页主页

Keywords: wind farm; short-term wind speed prediction; least squares support vector machine; improved differential evolution algorithmidgag8879环亚手机|首页主页

※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※idgag8879环亚手机|首页主页

机载气象雷达自适应危险天气预警方法仿真idgag8879环亚手机|首页主页

王磊1,刘心刚2,魏鸣3idgag8879环亚手机|首页主页

1.中国气象局成都高原气象研究所/高原与盆地暴雨旱涝灾害四川省重点实验室,成都 6100722.中国航空工业集团公司雷华电子技术研究所,无锡 2140633.气象灾害预报预警与评估协同创新中心,南京信息工程大学,南京 210044idgag8879环亚手机|首页主页

摘要:提出一种适用于我国不同季节、经纬度和下垫面的机载气象雷达强风暴预警算法。基于地基天气雷达数据建立机载气象雷达探测强风暴仿真模型。利用改进的区域分割法和TITAN算法识别强风暴单体及其特征参数。按经纬度和下垫面将我国划分为16个特征区域(含东海和南海),获取这些区域冰雹强风暴雷达特征参数阈值,并给出危险天气预警算法。基于多个危险天气雷达实况数据,进行机载气象雷达强风暴天气预警仿真实验。仿真实验结果表明,该算法有助于飞行员快速判定危险天气,保障飞行安全。idgag8879环亚手机|首页主页

关键词:机载气象雷达;自适应识别;三维仿真;超级单体风暴idgag8879环亚手机|首页主页

中图分类号:P415.2???????? 文献标识码:A?????? 文章编号:1004-731X (2017) 07-1572-10idgag8879环亚手机|首页主页

DOI: 10.16182/j.issn1004731x.joss.201707023idgag8879环亚手机|首页主页

Simulation of Adaptive Dangerous Weather Warning Method Based on Airborne Weather Radaridgag8879环亚手机|首页主页

Wang Lei1, Liu Xingang2, Wei Ming3idgag8879环亚手机|首页主页

(1. Chengdu Institute of Plateau Meteorology, CMA/Heavy Rain and Drought-Flood Disasters in Plateau and Basin Key Laboratory of Sichuan Province, Chengdu 610072, China; 2. Avic LEIHUA Electronic Technology Research Institute, Wuxi 214063, China; 3. Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, NUIST, Nanjing 210044, China.)idgag8879环亚手机|首页主页

Abstract: A kind of suitable airborne weather radar algorithm for different seasons, latitude and longitude and underlying surface in China was proposed. A simulation model of airborne weather radar for detecting strong storm weather based on the ground-based weather radar data was established. The improved algorithm of region segmentation and TITAN were used to identify strong storms and their characteristic parameters. China was divided into 16 climate characteristic regions (including East China Sea and South China Sea) per the latitude and longitude. The threshold of strong hail storm radar echo characteristic parameters in these areas was obtained, and the dangerous weather warning probability algorithm was given. The multiple dangerous weather radar data were used in airborne weather radar for the simulation experiments of detecting strong storm weather. Simulation results show that the algorithm can help the pilots to quickly determine dangerous weather and ensure flight safety.idgag8879环亚手机|首页主页

Keywords: airborne weather radar; adaptive recognition; three-dimensional simulation; super-cell stormidgag8879环亚手机|首页主页

※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※idgag8879环亚手机|首页主页

基于HLA的气象服务邦员设计与实现idgag8879环亚手机|首页主页

刘胤田1,王小东1,王再奎2idgag8879环亚手机|首页主页

(1. 成都信息工程大学软件工程学院,四川 成都 6102252. 海军模拟飞行训练中心,北京 102488)idgag8879环亚手机|首页主页

摘要:为了增加特殊天气现象下的飞行经验并保障飞行安全,飞行模拟训练中需要考虑特殊天气的多样性和典型性,气象数据的动态性和连续性,克服传统飞行模拟器使用的气象服务特殊天气现象单一、气象数据静止缺乏连续性的不足,提出具有多尺寸典型特殊天气模板库生成模块、气象数据动态推演模块以及气象格点数据插值计算模块的气象服务;并基于HLA接口规范建立气象服务邦员,设计FOM/SOM模板;给出气象服务仿真单元流程图。该气象服务能为飞行模拟训练系统提供较为真实的特殊天气现象。idgag8879环亚手机|首页主页

关键词:HLA;气象格点数据插值;气象服务;气象数据动态推演idgag8879环亚手机|首页主页

中图分类号:TP391.9 ??????文献标识码:A?????? 文章编号:1004-731X (2017) 07-1582-07idgag8879环亚手机|首页主页

DOI: 10.16182/j.issn1004731x.joss.201707024idgag8879环亚手机|首页主页

Meteorological Service Federate Design and Realization Based on HLAidgag8879环亚手机|首页主页

Liu Yintian1, Wang Xiaodong1, Wang Zaikui2idgag8879环亚手机|首页主页

(1. College of Software, Chengdu University of Information Technology, Chengdu 610225, China; 2. Naval Simulation Flight Training Center, Beijing 102488, China)idgag8879环亚手机|首页主页

Abstract: To increase flight safety and flight experience under special weather phenomena, the diversity and typical cases of special weather conditions should be considered in flight simulation training, the dynamic and successive meteorological data should be studied, and the insufficient of meteorological services should be overcome by comparing with the traditional flight simulator. The meteorological service with the generation model of multiple size of template library for typical special weather, the dynamical deduction model of meteorological data, and the interpolation calculation model of meteorological grid-point data were proposed. The meteorological service federate based on High Level Architecture (HLA) was established. FOM/SOM templates were built, and the unit flowchart was given. The more realistic special weather phenomena for flight simulation training system can be provided by the service.idgag8879环亚手机|首页主页

Keywords: HLA; data interpolation of meteorological lattice; meteorological service; dynamic deduction of meteorological dataidgag8879环亚手机|首页主页

※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※idgag8879环亚手机|首页主页

基于条纹式激光传感器的焊缝测量系统研究idgag8879环亚手机|首页主页

李琳,陈维杰,邹焱飚idgag8879环亚手机|首页主页

(华南理工大学机械与汽车工程学院,广东 广州 510640)idgag8879环亚手机|首页主页

摘要:焊接机器人通常采用示教再现的方法完成工件焊接。为确保这种工作模式能够实施,需要在前工序中采用人工点焊完成工件的定位,这将引起定位误差,使实际轨迹偏离示教轨迹。针对该问题,提出采用条纹式激光传感器作为焊缝离线检测装置。将激光传感器安装于焊接机器人末端,焊接前机器人沿着焊接轨迹运动,传感器检测获取焊缝截面信息并提取焊缝特征点,应用NURBS曲线拟合获得的焊缝轨迹。实验结果表明,该算法具有较高的精度和效率,能满足机器人自动搜索轨迹对实时响应的要求。idgag8879环亚手机|首页主页

关键词:非均匀有理B样条;曲线滤波;曲线拟合;条纹式激光传感器;焊缝测量idgag8879环亚手机|首页主页

中图分类号:TP242.2????? 文献标识码:A?????? 文章编号:1004-731X (2017) 07-1588-08idgag8879环亚手机|首页主页

DOI: 10.16182/j.issn1004731x.joss.201707025idgag8879环亚手机|首页主页

Weld Trajectory Measurement Based on Stripe Type Laser Sensoridgag8879环亚手机|首页主页

Li Lin, Chen Weijie, Zou Yanbiaoidgag8879环亚手机|首页主页

(School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou, Guangdong 510640, China)idgag8879环亚手机|首页主页

Abstract: Teaching and playback are usually used on welding robot to weld a part. To make sure the implementation of this mode, it is needed to locate the part using artificial sport welding in the front process, which could cause location error and make the actual track deviate from the teaching track. A welding track offline detection device using stripe type laser sensor was proposed for solving the problem. The laser sensor was mounted at the end of the robot. The robot moved along the weld trajectory before welding. The information of the weld track section was gotten and the feature points were extracted by the laser sensor. The weld trajectory was gained using NURBS curve fitting. Experimental results show that the algorithm is highly accurate and efficient, and can satisfy the requirement of robot’s automatic searching track for real-time response.idgag8879环亚手机|首页主页

Keywords: non-uniform rational B-spline; curve filtering; curve fitting; laser detection sensor; weld seam measurementidgag8879环亚手机|首页主页

※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※idgag8879环亚手机|首页主页

港区桥吊双PWM交流调速系统间谐波数学模型及仿真分析idgag8879环亚手机|首页主页

杨文焕1,杨迪瑞1,李荣高2idgag8879环亚手机|首页主页

(1.上海理工大学光电信息与计算机工程学院,上海 2000932.上海同盛电力有限公司,上海 200122)idgag8879环亚手机|首页主页

摘要:配电网中双PWM可逆调速系统的总容量占电网容量的比例较大时,双PWM产生的间谐波会引起电能质量污染,严重时引起配电网电压闪变,影响电网稳定运行。通过对上海洋山深水港配电网桥吊系统的研究,建立了双PWM交流调速系统多象限运行间谐波数学模型。利用MATLAB依照双PWM可逆调速系统桥吊的运动规律,对不同转速的用电和馈电状态下注入电网间谐波进行了仿真,仿真与测试结果均表明该模型的可靠性。模型揭示了洋山深水港区配电网电压闪变的原因,成功地在洋山深水港区电网电能质量控制中得到应用,有效地解决了电压闪变问题。idgag8879环亚手机|首页主页

关键词:PWM;港区桥吊;数学模型;网侧电流;间谐波idgag8879环亚手机|首页主页

中图分类号:U231.92; TP391 ??????文献标识码:A?????? 文章编号:1004-731X (2017) 07-1596-09idgag8879环亚手机|首页主页

DOI: 10.16182/j.issn1004731x.joss.201707026idgag8879环亚手机|首页主页

Modeling and Simulation for Inter-harmonics of Double PWM AC Speed Control System for Port Bridge Craneidgag8879环亚手机|首页主页

Yang Wenhuan1, Yang Dirui1, Li Ronggao2idgag8879环亚手机|首页主页

(1. School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China; 2. Tongsheng Electricity Power Company Ltd., Pudong District, Shanghai 200122, China)idgag8879环亚手机|首页主页

Abstract: When the total capacity of double PWM reversible speed control system in distribution network accounts for a larger proportion of power grid capacity, the power quality pollution, or even voltage flicker is generated by interharmonics of double PWM system. Therefore the stable operation of the power grid is affected. Based on the studies on bridge crane system in Shanghai Deep water Port area, a mathematical model of multi-quadrant double PWM reversible speed control system was established. In accordance with the operating characteristics of motor, the inter-harmonic currents, injected into grid were simulated at different speeds respectively in the power and feed state. Simulation outcomes and measured results both proved the feasibility and validity of the model. The reasons for voltage flicker in distribution network were revealed by the model, and the model has been applied successfully in the power quality control system of Shanghai Deep water Port areaand themicro-grid voltage flicker problems have been successfully solved.idgag8879环亚手机|首页主页

Keywords: double PWM; bridge crane; mathematical model; grid-side current; interharmonicidgag8879环亚手机|首页主页

※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※idgag8879环亚手机|首页主页

一种支持QoS的电力通信组网建模与仿真idgag8879环亚手机|首页主页

张学毅,谷聚辉,周美琴idgag8879环亚手机|首页主页

(湖南工业大学电气与信息工程学院,湖南 株洲 412007)idgag8879环亚手机|首页主页

摘要:针对低压配电网电力载波通信网络复杂及信道时变等特点,传统蚁群算法在解决路由问题时,存在收敛过慢和停滞现象,算法容易陷入局部最优。提出了一种以传输时延和负载为评价因子的自动组网算,在蚁群算法后期加入遗传算法,利用改进的交叉算子获得最优解,变异算子加速算法向最优解收敛。模拟建立电力通信网络拓扑结构,结合QoS路由要求,通过MATLAB仿真,验证了该算法通信性能得到改善,在一定程度上解决了电力通信QoS路由问题。idgag8879环亚手机|首页主页

关键词:电力;通信网络;服务质量;混合蚁群遗传算法;仿真idgag8879环亚手机|首页主页

中图分类号:TN91 ??????文献标识码:A?????? 文章编号:1004-731X (2017) 07-1605-06idgag8879环亚手机|首页主页

DOI: 10.16182/j.issn1004731x.joss.201707027idgag8879环亚手机|首页主页

Modeling and Simulation of Power Communication Networking Based on Quality of Serviceidgag8879环亚手机|首页主页

Zhang Xueyi, Gu Juhui, Zhou Meiqinidgag8879环亚手机|首页主页

(Electrical and Information Engineering College, Hunan University of Technology, Zhuzhou 412007, China)idgag8879环亚手机|首页主页

Abstract: For the complex network topology and channel time-varying characteristics of power line carrier communication in low voltage distribution grid, there is a phenomenon of slow convergence and stagnation when solving the routing problem with traditional ant colony algorithm. The algorithm used is easy to fall into premature and local optimization. An automatic networking algorithm based on transmission delay and the load factor of the evaluation factors was proposed and a genetic algorithm was joined at a later stage. The optimal solution was obtained by using the improved crossover operators, and the convergence of optimal algorithm solution was accelerated by mutation operators. A logical topology of power line communication network combining with QoS requirements was established MATLAB simulation experiments show that the communication performance has been improved by the new algorithm and the QoS routing problems of power communication have been solved.idgag8879环亚手机|首页主页

Keywords: power; communication network; quality of service; hybrid ant colony and genetic algorithm; simulationidgag8879环亚手机|首页主页

※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※idgag8879环亚手机|首页主页

B2B供应链全局需求信息共享价值的仿真研究idgag8879环亚手机|首页主页

胡东波,沈悦,衡如丹,张滨滨idgag8879环亚手机|首页主页

(暨南大学管理学院,广州 510632)idgag8879环亚手机|首页主页

摘要:B2B电子商务环境下,基于多供应商供应链,通过建立多智能体仿真模型,研究了全局需求信息共享对供应商的激励效应,并考察了各供应链参数对这种激励效应的影响。研究结果表明:相对于局部需求信息共享,全局需求信息共享能对供应商带来显着的激励效应;被选供应商的个数越接近备选供应商的个数,全局需求信息共享的价值越明显,并存在最优备选供应商个数;在全局需求信息共享的基础上,若进一步共享供应商评价规则,当实际评价规则与供应商的预期评价规则不一致时,激励效应能进一步增加。idgag8879环亚手机|首页主页

关键词:B2B;需求信息共享;供应商激励;多智能体仿真idgag8879环亚手机|首页主页

中图分类号:F274????? 文献标识码:A?????? 文章编号:1004-731X (2017) 07-1611-07idgag8879环亚手机|首页主页

DOI: 10.16182/j.issn1004731x.joss.201707028idgag8879环亚手机|首页主页

Simulation on Global Demand Information Sharing Value in B2B Supply Chainidgag8879环亚手机|首页主页

Hu Dongbo, Shen Yue, Heng Rudan, Zhang Binbinidgag8879环亚手机|首页主页

(Management School Jinan University, Guangzhou 510632, China)idgag8879环亚手机|首页主页

Abstract: In B2B e-commerce environment, a multi-agent simulation model based on the supply chain with multi suppliers was established to study the incentive effects of the global demand information sharing on suppliers and the effects of different parameters on these incentive effects. The research results are as follows: Compared with the local demand information sharing, the global demand information sharing can bring significant incentive effect to the supplier. The global demand information sharing is more valuable with the number of selected suppliers getting closer to the number of alternative suppliers, and an optimal number of alternative suppliers do exist. Based on the global demand information sharing, if the supplier evaluation rules are further shared, the incentive effect can be further strengthened when the actual evaluation rules are inconsistent with the suppliers’ expectation.idgag8879环亚手机|首页主页

Keywords: B2B; demand information sharing; incentive on supplier; multi-agent simulationidgag8879环亚手机|首页主页

※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※idgag8879环亚手机|首页主页

认知无线电中一种新型的功率控制算法idgag8879环亚手机|首页主页

龙敏,雷娟娟idgag8879环亚手机|首页主页

(长沙理工大学计算机与通信工程学院,湖南 长沙 410004)idgag8879环亚手机|首页主页

摘要:针对在认知无线电网络通信过程中的远近效应、路径损耗过大以及算法稳定性等问题,提出了一种新的认知无线电网络功率控制算法。该算法对效用函数进行了改进,加入链路质量和主用户干扰容限值等惩罚因素,将所有认知用户的信干噪比控制在最小阈值以上,同时将认知用户的总干扰值控制在主用户的干扰容限值之内。证明了该算法纳什均衡的存在性和唯一性。MATLAB仿真结果表明,该算法稳定性较好,在使用较小发射功率的情况下,可以减少路径的损耗,并有效地解决了远近公平效应,同时,使得认知用户的干扰总值小于主用户的干扰容限。idgag8879环亚手机|首页主页

关键词:认知无线电;功率控制;效用函数;远近效应;路径损耗idgag8879环亚手机|首页主页

中图分类号:TN915.5 ??????文献标识码:A?????? 文章编号:1004-731X (2017) 07-1617-08idgag8879环亚手机|首页主页

DOI: 10.16182/j.issn1004731x.joss.201707029idgag8879环亚手机|首页主页

Novel Power Control Algorithm for Cognitive Radio Networkidgag8879环亚手机|首页主页

Long Min, Lei Juanjuanidgag8879环亚手机|首页主页

(Department of Computer and Communication Engineering, Hunan Changsha University of Science and Technology, Changsha 410004, China)idgag8879环亚手机|首页主页

Abstract: For the problems of near-far effect, large path loss, and stability of algorithm, etc., in the cognitive radio, a new power control algorithm was proposed. Utility function was improved effectively, where punishment factors, such as, link quality and the interference capacity limit of the primary users (PUs) were considered. Signal-to-interference radio (SINR) of cognitive users (CUs) was controlled above the minimum threshold, and the interference value of the CUs was controlled below the capacity tolerance of PUs. The existence of Nash equilibrium was given. Simulation results show that the new algorithm has better stability; the loss of path can be reduced with smaller transmission power; the near-far effect problem can be solved effectively, and the total interference of CUs is less than the interference capacity tolerance of PUs.idgag8879环亚手机|首页主页

Keywords: cognitive radio; power control; utility function; near-far effect; path lossidgag8879环亚手机|首页主页

※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※idgag8879环亚手机|首页主页

基于IL的飞机防滑刹车系统反馈补偿控制研究idgag8879环亚手机|首页主页

高洁1,高冰2,刘建英1idgag8879环亚手机|首页主页

1.中国民航大学电子信息与自动化学院,天津 3003002.中国民航大学工程技术训练中心,天津 300300idgag8879环亚手机|首页主页

摘要:防滑刹车直接决定了飞机刹车的安全性、高效性以及舒适性。鉴于目前防滑刹车系统存在控制率不足的问题,通过分析飞机着陆过程,建立了飞机全电刹车系统的非线性模型,针对防滑控制往复性特点引入迭代学习算法,利用PD型学习率对不同速度及路面条件进行分组训练,建立最佳滑移率与速度、路面条件关系的知识库,设计出能够在线辨识不同路面条件的前馈控制知识系统,利用反馈补偿控制机制实现了系统的抗扰动性;通过Matlab仿真证明了该控制方法的优越性:能够保持最佳滑移率,缩短刹车距离,实现了平稳刹车。idgag8879环亚手机|首页主页

关键词:防滑刹车;非线性模型;迭代学习;滑移率;结合系数;反馈补偿idgag8879环亚手机|首页主页

中图分类号:V227+.5????? 文献标识码:A?????? 文章编号:1004-731X (2017) 07-1625-06idgag8879环亚手机|首页主页

DOI: 10.16182/j.issn1004731x.joss.201707030idgag8879环亚手机|首页主页

Research on Feedback Compensation Control for Aircraft Electric Antiskid Brake System Based on ILidgag8879环亚手机|首页主页

Gao Jie1, Gao Bing2, Liu Jianying1idgag8879环亚手机|首页主页

(1. School of Electronic Information and Automation, Civil Aviation University of China, Tianjin 300300, China; 2. Engineering Techniques Training Center, Civil Aviation University of China, Tianjin 300300, China)idgag8879环亚手机|首页主页

Abstract: Safety, efficiency and comfort of aircraft are all determined by antiskid braking system. Because of the problem of inadequate control in the anti-skid braking system, the nonlinear model of the aircraft electric braking system was built by the analysis of aircraft landing process, and the iterative learning algorithm was introduced for reciprocating characteristics of anti-skid control. The groups in different speeds and road conditions were trained using the PD type learning rate. The knowledge base on the relationship among the optimal slip ratio and velocity and road conditions was built. The feed-forward control knowledge system for identifying the different road conditions was designed. The anti-disturbance of the system was realized by the feedback compensation control strategy. Simulation results prove that the system can maintain the best slip rate, shorten the braking distance, and finally achieve a smooth brake.idgag8879环亚手机|首页主页

Keywords: antiskid brake; nonlinear model; iterative learning; slip rate; ground adhesion coefficient; feedback compensationidgag8879环亚手机|首页主页

?idgag8879环亚手机|首页主页

※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※idgag8879环亚手机|首页主页

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