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2016年第8期

时间:2016-08-10 13:14:13??来源:??作者:

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张宇献1,钱小毅1,董晓1,王建辉2
(1.沈阳工业大学电气工程学院,沈阳 1108702.东北大学信息科学与工程学院,沈阳 110819)
摘要:针对典型划分式聚类算法对噪声和孤立点数据敏感问题,提出一种基于数据分散度的聚类算法。该算法定义数据分散度指标,将其引入非欧氏距离函数建立相似性度量实现数据的聚类,并根据基于改进划分系数的有效性函数获取最佳聚类数。将其应用于纺织浆纱过程质量指标建模中,采用径向基神经网络建立上浆率质量指标模型,通过该聚类算法确定隐层节点数,求取径向基函数中心。实验结果表明所提及的基于数据分散度的聚类算法对噪声和孤立点数据敏感度低,所建立的上浆率质量指标模型具有较高精度。
关键词:质量指标模型;聚类;数据分散度;非欧氏距离;纺织浆纱过程
中图分类号:TP183????? 文献标识码:A??? ???文章编号:1004-731X (2016) 08-1707-08
Slashing Quality Index Modeling and Simulation Based on Data Dispersion Clustering
Zhang Yuxian1, Qian Xiaoyi1, Dong Xiao1, Wang Jianhui2
(1. School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China;fNxag8879环亚手机|首页主页
2. College of Information Science and Engineering, Northeastern University, Shenyang 110819, China)
Abstract: For the sensitivity of noise and outliers data in the typical partitioning clustering algorithm, a clustering algorithm based on data dispersion was proposed. The data dispersion was defined and introduced to a non-Euclidean distance. The similarity metric was established, and the data clustering was realized. The optimal clustering number was obtained by the validity function based on improved partition coefficient. Thenthe proposed clustering algorithm was applied to quality index model in slashing process. A size add-on quality index model was built by radial basis function neural networks. The node number of hidden layer was determined and the center of radial basis function was obtained by the proposed clustering algorithm. The empirical result shows that the clustering result is insensitive to noise and outliers data, and the accuracy of size add-on quality index model is higher.
Keywords: quality index model; clustering; data dispersion; non-Euclidean distance; textile slashing process
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新型忆阻细胞神经网络的建模及电路仿真
张小红,廖琳玉,俞梁华
(江西理工大学信息工程学院,赣州 341000)
摘要:作为继电阻、电容、电感三大电路基本元件外的第四类电路元件忆阻器,可模拟大脑突触神经网络的存储记忆功能。构建一个传统三维细胞神经网络,利用磁控忆阻器的非线性特性替换传统细胞神经网络的输出模块。采用Multisim通用电路元件构建磁控忆阻等效电路,在电路整体设计上简化了输出函数模块数量,与具有混沌行为的CNN系统相比,新型忆阻CNN电路不仅展现出了混沌吸引子现象,而且忆阻内部的磁能量随细胞状态而变化,可完全达到等效输出函数的忆导值。数值计算与电路仿真结果验证了忆阻细胞神经网络的混沌特性及新设计方法的可行性,在信号处理、同步控制与图像加密等方面具有现实的应用价值。
关键词:细胞神经网络;忆阻器;混沌;分段线性;电路仿真;保密通信
中图分类号:TP391.9/O415.5???? 文献标识码:A????? 文章编号:1004-731X (2016) 08-1715-11
Novel Modeling of Memristive Cellular Neural Network and Its Circuit Simulation
Zhang Xiaohong, Liao Linyu, Yu Lianghua
(School of Information Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China)
Abstract: The memristor as the fourth fundamental circuit component included along with the resistor, capacitor and inductor could simulate the storage memory function of brain neural network. A traditional three-dimensional CNN was designed, and the output function was implemented with the nonlinear characteristics of a flux-controlled memristor. The conventional electronic devices in Multisim were utilized to simulate flux-controlled memristor which simplified the output function part of the circuits. To compare with the CNN system which has chaotic behaviors, the circuits of novel memristive cellular neural network not only can show a chaos attractors phenomenon, but also the inner magnetic energy of memristor is changed with state of CNN to achieve the equivalent values of output function. Numerical calculation and circuit simulation results verify its chaotic characteristics and feasibility, and can be applied in synchronization communication, image encryption and speech signal processing, et al.
Keywords: cellular neural network; memristor; chaotic; piecewise-linear; circuit simulation; secure communication
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基于折息递推辨识算法的数控机床能效预测
蔡磊,王艳,纪志成
(江南大学 电气自动化研究所,无锡 214122
摘要:针对数控机床能量效率难于直接获取的问题,结合折息递推辨识算法给出一种新的机床能效预测方法。基于机床主传动系统功率平衡方程及附加载荷损耗函数,得出切削功率的估计模型;进一步考虑模型中的附加载荷损耗系数无法直接测量,采用折息递推辨识算法对附加载荷损耗系数进行辨识,从而估算出切削功率,根据机床的能效定义计算出能效值。实验与仿真结果表明,采用折息递推辨识方法估计附加载荷损耗系数,能够比采用传统最小二乘估计获得更高的辨识精度,求取的机床效率与其它方法相比更接近真实值。
关键词:参数辨识;数控机床;能耗;能效预测
中图分类号:TP391.9??????文献标识码:A?????? 文章编号:1004-731X (2016) 08-1725-07
Prediction of Energy Efficiency of NC Machine Tools Based on Recursive Method with Discounted Measurements
Cai Lei, Wang Yan, Ji Zhicheng
(Institute of Electrical Automation, Jiangnan University, Wuxi 214122, China)
Abstract: Aiming at the problem that the energy efficiency of numerical control machine tool is difficult to obtain directly, a new method combined with the recursive method with discounted measurements was presented to predict the energy efficiency of machine tool. The estimation model of the cutting power was given in view of the power balance equation of the machine tool main drive system and the additional load loss function, further taking into account the additional load loss coefficients in model could not be directly measured, the recursive method with discounted measurements was adopted to identify the additional load loss coefficients as well as estimating the cutting power. Afterwards, the energy efficiency of machine tool was calculated according to its definition. The experiment and simulation results show that the recursive method with discounted measurements has greater advantage on obtaining higher identification precision of the additional load loss coefficients than the traditional least-squares method and the efficiency of the machine tool which was obtained by using this method comes closer to the real value than other methods.
Keywords: parameter identification; NC machine tools; energy consume; energy efficiency prediction
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一种混沌变异的入侵杂草优化算法及性能仿真
黄霞1,2,叶春明1,曹磊1
1.上海理工大学管理学院,上海 2000932.江苏科技大学张家港校区,江苏张家港 215600
摘要:杂草算法是受杂草扩张繁殖行为启发而来的一种新颖的仿生群智能优化算法。在分析基本杂草算法仿生原理和局限性的基础上,提出一种改进的入侵杂草优化算法,运用混沌反向学习策略对种群进行初始化,通过变异算子增加种群的多样性;并对种群中的精英个体进行混沌搜索,以提高其跳离局部最优值的能力。对经典函数的仿真测试表明,改进算法性能优于基本杂草算法,是解决工程应用复杂函数优化问题的一种有效方法。
关键词:杂草算法;仿生原理;混沌变异;仿真测试
中图分类号:TP301.6????? 文献标识码:A?????? 文章编号:1004-731X (2016) 08-1732-09
Invasive Weed Optimization Algorithm Combined with Chaotic Mutation and Analysis of Its Property
Huang Xia1,2, Ye Chunming1, Cao Lei1
(1. Business School, University of Shanghai for Science and Technology, Shanghai 200093, China;fNxag8879环亚手机|首页主页
2. Zhangjiagang Campus, Jiangsu University of Science and Technology, Zhangjiagang 215600, China)
Abstract:Inspired by the reproductive aggressive behavior of weeds in nature, invasive weed optimization algorithm (IWO) was developed as a novel bionic swarm intelligence optimization algorithm. An improved IWO algorithm was proposed on the basis of analyzing bionic principle and limitations of basic IWO, which applied an initialization strategy based on chaotic opposition-based learning, increased the diversity of the population through the mutation operator, and enhanced its ability to jump out of local optimal value by chaotic search around current elites. Simulation results for benchmark functions show that the proposed algorithm has improved optimization property compared with IWO, as an effective method to solve complex function optimization problems in engineering application.
Keywords: invasive weed algorithm; bionic principle; chaotic mutation; simulation test
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基于时空Petri网的复杂软件系统可信建模与分析
李刚1,2,韩龙美1,朱永利1,2
1.华北电力大学控制与计算机工程学院,保定 0710032.新能源电力系统国家重点实验室(华北电力大学),北京 102206
摘要:复杂软件系统的复杂度不仅由于软件自身耦合关联,互联网环境也产生巨大影响,它已不能脱离外界环境而独立存在。Petri网利用库所和变迁满足分布式系统建模,支持并发和异步,但基础petri网不能对具有时间约束的复杂软件系统特征进行完备地描述。提出了一种时空Petri网的建模方法,对复杂软件从协同学和软件行为学入手,建立其可信度分析模型,并考虑外界环境对复杂软件的影响,以时空特性为约束条件,分析复杂软件在外界环境影响下的可信度。以复杂网络软件系统为分析对象,仿真结果表明,该模型能够对具有时空特性的复杂软件系统进行可信性分析。
关键词:复杂软件系统;可信度量;时空Petri网;建模与仿真
中图分类号:TP391.9????? 文献标识码:A?????? 文章编号:1004-731X (2016) 08-1740-08
Trusted Modeling And Analysis of Complex Software Systems Based on Spatial-temporal Petri Nets
Li Gang1,2, Han Longmei1, Zhu Yongli1,2
(1. School of Control and Computer Engineering, North China Electric Power University, Baoding 071003, China;fNxag8879环亚手机|首页主页
2. State Key Laboratory of Alternate Electric Power System with Renewable Energy Sources (NCEPU), Beijing 102206, China)
Abstract: Complexity of complex software system is not only due to the coupling correlation software itself, but also the Internet environment has great influence on the complex software system, and it has not existed independently from the external environment. Petri net uses of place and transition meet the modeling of distributed system, support concurrency and asynchronous, but the basic Petri net can't completely describe the characteristic of complex software systems with time constraints. A Petri net modeling method based on spatial and temporal was proposed. From aspects of synergetic and software behavior, constraints on the characteristics of spatial and temporal, this method established credibility analysis model of complex software system, and considered the influence of external environment for complex software systems, and analyzed credibility of complex software system under the environment influence. In complex network software system as the analysis object, the simulation results show that this model is able to analyze the credibility of the spatial-temporal complex software system.
Keywords: complex software system; trusted measurement; spatial-temporal Petri net; modeling and simulation
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运用栅格矩阵建立兵棋地图的地形属性
张锦明1,2
(1. 信息工程大学地理空间信息学院,郑州 450052;2. 中国科学院遥感与数字地球研究所,北京 100081)
摘要:兵棋地图是在一定条件下对地理环境的概略描述,用于兵棋推演过程中辅助指挥员或作战模型定位空间位置、确定空间属性,即兵棋地图建模,包括几何建模和属性建模。提出了栅格矩阵算法用于兵棋地图的属性建模,它有效降低了建模复杂度、提高了建模效率。描述了属性建模的基本流程,讨论了影响属性建模的难点,表现为六角格与要素压盖面积比的计算。描述了替代传统多边形裁剪算法的栅格矩阵算法,指出其关键在于确定一个合适的栅格矩阵尺寸取值区间,用以保证计算精度和计算效率之间的平衡。选取河南登封地区作为实验区域,以植被要素与六角格的压盖面积比为实验对象,研究了倍数n对计算效率的影响,确定了它的合适取值区间为(1/32,1/64)。
关键词:兵棋;兵棋地图;六角格;地形属性;属性建模;栅格矩阵
中图分类号:P208???? ??文献标识码:A????? ??文章编号:1004-731X (2016) 08-1748-09
Using Raster Lattices to Build Terrain Attribute of Wargame Map
Zhang Jinming1,2
(1. Institute of Geospatial Information, Information Engineering University, Zhengzhou 450052, China;fNxag8879环亚手机|首页主页
2. Institute of Remote Sensing and Digital Earth Chinese Academy of Sciences, Beijing 100081, China)
Abstract: Wargame map is a sketchy description of geographical environment under certain conditions. It is used to assist commanders or operational models to locate spatial positions and to determine spatial attributes. The former process is called geometric modeling and the latter attribute modeling, and the combination of which is known as Wargame Map Modeling. A Raster Lattice Algorithm for attribute modeling was proposed, which could effectively reduce modeling complexity and improve modeling efficiency. The basic process of attribute modeling and discussing its difficulty was described, i.e., the calculation of the covered areal ratio between hexagon and the geographical environment element. A Raster Lattice Algorithm was proposed to replace the traditional polygon clipping algorithm. For the proposed algorithm, the key lied in determining a suitable range of raster lattice size to ensure a balance between computational accuracy and efficiency. To this end, the Dengfeng region of Henan province as the experimental area was chosen, taking the covered areal ratio of vegetation elements to hexagon as the experimental object, and investigating the effects of multiple n on the efficiency of the algorithm. The appropriate range is (1/32, 1/64).
Keywords: wargame; wargame map; hexagon; terrain attribute; attribute modelling; raster lattice
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基于有限元耦合算法的变压器铁芯损耗计算
王永强,郑志宏,欧阳宝龙,李建芳
(华北电力大学河北省输变电设备安全防御重点实验室,河北 保定 071000)
摘要:为了准确计算除尘变压器的铁芯损耗,在分析传统的有限元分析方法以及Steinmetz公式的基础上,提出了一种计算除尘变压器铁芯损耗的棱边元与节点元相结合的法模型;并以一台20 kHz、50 kV、60 kW除尘变压器为例,建立了三维模型,计算了变压器的铁芯损耗。将利用该方法计算的出的铁芯损耗计算结果同实测值、节点有限元、棱边有限元以及Steinmetz公式计算结果进行对比。对比结果表明:该方法计算精度明显高于Steinmetz公式模型、棱边有限元法以及节点有限元法的计算结果。证明了该算法能够更加准确的计算变压器铁芯损耗。
关键词:棱边元与节点元耦合算法;高频变压器;铁芯损耗;法
中图分类号:TP391.9????? 文献标识码:A??? ???文章编号:1004-731X (2016) 08-1757-07
?Calculation of Transformer Core Loss Based on Finite Element Coupling Algorithm
Wang Yongqiang, Zheng Zhihong, Ouyang Baolong, Li Jianfang
(Hebei Provincial Key Laboratory of Power Transmission Equipment Security Defense, North China Electric Power University, Baoding 071000, China)
Abstract: In order to accurately calculate the deducting transformer core loss, on the basis of analysis on traditional finite element method and Steinmetz method, an edge-nodal coupled method was proposed to calculate the High Power High Frequency High Voltage transformer core loss. Taking a 20 kHz, 50 kV, 60 kW transformer for example, the 3D model was established to calculate the transformer core loss. By comparing the measured data of transformer core loss with the figures calculated by edge-nodal coupled method, NFEM, EFEM and Steinmetz method, the comparison results show that: the edge-nodal coupled method has higher accuracy than results calculated by Steinmetz model, edge finite element method and node finite element method.
Keywords: edge-nodal coupled method; high-frequency transformer; core loss; method
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基于前景目标提取的图像风格化绘制算法
赵杨1,袁国武2,谢党恩3,徐丹2
(1. 云南师范大学传媒学院动画系,昆明 650092;2. 云南大学信息学院计算机科学与工程系,昆明 650091fNxag8879环亚手机|首页主页
3. 许昌学院网络信息中心,许昌 461000)
摘要:算法将Graph Cuts理论运用于输入图像前景目标的提取方面。通过交互式分割,用户将图像分为前景及背景区域。对于背景区域,应用设计的多种非真实感绘制算法,将其渲染成具有卡通画、铅笔画或者油画等风格的艺术图像,对于前景区域保持其细节特征不变。通过融合前背景区域,获得具有风格化的艺术图像。实验显示,处理一定数量的图像,算法生成的风格化图像呈现了视觉满意的非真实感效果。
关键词:图割;双边滤波器;色彩量化;铅笔画;油画;非真实感绘制
中图分类号:TP391??????文献标识码:A?????? 文章编号:1004-731X (2016) 08-1764-05
Stylization Rendering Algorithm Based on Interactive Graph Cuts Method for Image Segmentation
Zhao Yang1, Yuan Guowu2, Xie Dangen3, Xu Dan2
(1. Department of Animation, Yunnan Normal University, Kunming 650092, China; 2. Department of Computer Science, Yunnan University, Kunming 650091, China; 3. Network Information Center, Xuchang University, Xuchang 461000, China)
Abstract: The image is cut into two parts, the object and background, using the Graph Cuts interactive image segmentation algorithm. Through interactive image segmentation, user segmented image into a foreground region and a background region. For background area, a variety of non-photorealistic rendering algorithm was designed, which could render the original image into artistic images with other cartoon painting, pencil drawing or painting style. For foreground region, the algorithm maintained its feathers unchanged. By merging foreground and background areas, the artistic images were obtained with variety styles. Experiments show that the algorithm designed can get the desired result for processing a certain number of images and videos.
Keywords: graph cuts; bilateral filter; color quantization; pencil drawing painting; oil painting; non-photorealistic rendering
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环境影响与参数摄动下船舶航速的非线性H控制
袁裕鹏1,2,3,章勐4,严新平1,2,3,郭波5,万江龙1,2,3
1. 武汉理工大学能源与动力工程学院可靠性工程研究所,武汉 4300632. 武汉理工大学船舶动力工程技术交通行业重点实验室,武汉 4300633.武汉理工大学国家水运安全工程技术研究中心,武汉 4300634. 武汉理工大学能源与动力工程学院可靠性工程研究所,武汉 430063 5. 中国水产科学研究院渔业机械仪器研究所,上海 200092
摘要:为了提高船舶的自动化水平,增强船舶的航行安全,对航速的稳定控制是重要的因素之一。由于船舶航速控制是一个参数时变、非线性,且其动态特性受环境因素的影响,因此常规的控制方法难以获得良好的控制效果。在建立船舶运动的非线性数学模型时,考虑了环境因素如风、浪、流的影响和系统参数不确定性。在此基础上,利用微分几何的方法对模型进行了精确线性化,然后利用线性H控制理论,设计了船舶航速的非线性H控制器。仿真结果表明非线性H控制器能有效的抑制环境扰动,提高系统的稳定性,保证控制精度,具有较强的鲁棒性。
关键词:船舶航速控制;参数摄动;非线性H控制;鲁棒性
中图分类号:U665.12????? 文献标识码:A??? ???文章编号:1004-731X (2016) 08-1769-07
Yuan Yupeng1,2,3, Zhang Meng4, Yan Xinping1,2,3, Guo Bo5, Wan Jianglong1,2,3
(1. Reliability Engineering Institute, School of Energy and Power Engineering, Wuhan University of Technology, Wuhan 430063, China;2. Key Laboratory of Marine Power Engineering & Technology (Ministry of Communications), Wuhan University of Technology, Wuhan 430063, China;3. National Engineering Research Center for Water Transport Safety, Wuhan University of Technology, Wuhan 430063, China;4. School of Energy and Power Engineering, Wuhan University of Technology, Wuhan 430063, China;5. Fishery Machinery and Instrument Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200092, China)
Abstract: In order to improve the automation level and enhance the navigation safety of ships, stable control for ship speed is very important. Good control effect is difficult to obtain based on the conventional control method since the marine speed control system is a time-varying parameters and nonlinear complicated propulsion system. The uncertainty of the system parameters and the effect of environment such as winds, waves and currents were considered adequately in ship motion mathematical model with disturbing force. The mathematic model was linearized accurately with the differential geometry method. Then the nonlinear H controller was designed according to the linear H theory. The simulation results show that the H controller could effectively restrain the effect of the environment disturbance, improve the stability of the control system, ensure the accuracy of control and enhance the systems' robustness.
Keywords: ship speed control; parameter perturbation; nonlinear H-infinity control; robustness
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有滞留时间约束的单臂集束型装备调度研究
卢睿1,李林瑛2
(1. 辽宁警察学院公安信息系,大连 116036;2. 大连外国语大学软件学院,大连 116044)
摘要:考虑有滞留时间约束的单臂集束型装备调度模型和可调度性问题,建立了包括单臂机械手和加工模块时序约束关系的混合整数规划模型,并从理论上证明了并行模块等价加工时间的合理性。在此模型基础上,分析了单臂机械手和加工模块的周期性加工和搬运晶圆过程,证明了集束型装备可调度性的条件。对模型和可调度性条件进行了仿真实验分析,结果表明模型有效且可行。
关键词:半导体制造;集束型装备;单臂机械手;可调度性分析
中图分类号:TP241.2/278????? 文献标识码:A??? ???文章编号:1004-731X (2016) 08-1776-07
Research on Scheduling Problem of Single-arm Cluster Tools with Residency Time Constraints
Lu Rui1, Li Linying2
(1. Liaoning Police College Academy, Dalian 116036, China; 2. School of Software, Dalian University of Foreign Languages, Dalian 116044, China)
Abstract: Considering the scheduling model and schedulibility for single-arm cluster tools with wafer residency time constraints, a mixed- integer linear programming model with both single-arm and temporal constraints for processing module was constructed. The rationality of equivalent processing time for concurrency module was theoretically proved. Based on this, the periodic wafer processing and transportation procedure for both single-arm and processing module was analyzed. Meanwhile, the schedulibility conditions for cluster tools were proved. The simulation experiments were carried out to test the model and schedulable conditions, and the results reveal the validity and feasibility of the presented model.
Keywords: semiconductor manufactory; cluster tools; dual-blade robot; schedulability analysis
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一种冗余自由度双臂机器人协调控制器设计
王美玲1,2,骆敏舟1,2
(1. 中国科学技术大学自动化系,合肥 230026;2. 中国科学院合肥物质科学研究院先进制造技术研究所,常州 213164)
摘要:将冗余自由度双臂协作机器人协调操作分为三种工作模式:双臂独立操作模式、双臂全约束协调操作模式和双臂部分约束协调操作模式。针对以上三种工作模式,分别建立推导双臂及与被操作物体之间相互作用的动力学模型。以被操作任务的运动和力为控制目标,对以上三种模式设计了统一的双臂协调控制器,该控制器可以通过两种基于动力学模型的前馈控制器和计算力矩控制器实施。通过冗余自由度双臂机器人双臂协调操作仿真验证了该控制器的有效性,且仿真结果显示相比于前馈控制器,计算力矩控制器具有较好的轨迹跟踪精度。
关键词:双臂机器人;冗余自由度;动力学;协调操作;控制器设计
中图分类号:TP242???? ??文献标识码:A?????? 文章编号:1004-731X (2016) 08-1783-07
Cooperative Controller Design for Redundant Dual Arm Robot
Wang Meiling1,2, Luo Minzhou1,2
(1. Department of Automation, University of Science and Technology of China, Hefei 230026, China;2. Institute of Advanced Manufacturing Technology Hefei Institute of Physical Science, Chinese Academy of Sciences, Changzhou 213164, China)
Abstract: Cooperative operation for a redundant dual arm robot can be divided into three modes, namely, independent mode, full constrained cooperative working mode and partly constrained cooperative working mode. The dynamic equations of both dual arms and the interactions between dual arms and the operating objects were established and derived based on the three modes, and a unified formulation was obtained. With focus on motion and force of the desired task being operated, a unified controller was designed which could be carried out based on two dynamic model based controllers, namely feedforward controller and computer torque controller. Simulations of dual arms cooperative operation were carried out on a redundant dual arm robot, results of simulations were reported and discussed to validate the theoretical results of the proposed controller. Comparing with feedforward controller, the computer torque controller has better trajectory tracking precision.
Keywords: dual arm robot; redundant degree of freedom; dynamics; cooperative operation; controller design
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北斗系统BCH码的低复杂度软判决译码算法
曲国伟1,邓松峰2
(1.烟台南山学院,烟台 265713;2.航天电子技术研究所,上海 201109
摘要:对于北斗卫星导航系统中使用的BCH(15,11)码,提出了一种基于重编码的低复杂度软判决译码算法。该算法在检测到硬判决结果包含错误时,根据软判决向量构造若干备选信息序列,并对每个信息序列进行重新编码,与接收软判决向量进行相关,选择最大相关值的码字作为译码结果。仿真结果表明,该算法相对于传统的硬判决译码算法的复杂度增加不高,但是纠错性能相有了很大提升,并且避免了纠错ROM信号的存储,因此是实际导航接收机译码算法的良好选择。
关键词:北斗;BCH码;软判决译码;重编码
中图分类号:TN967.1???? ??文献标识码:A??? ???文章编号:1004-731X (2016) 08-1790-05
Low-complexity Soft-Decision Decoding Algorithm for BCH Code in BeiDou System
Qu Guowei1, Deng Songfeng2
(1. Yantai Nanshan University, Yantai 265713, China; 2. Aerospace Electronic Technology Research Institute, Shanghai 201109, China)
Abstract: A low-complexity soft-decision decoding algorithm based on the re-encoding technique was proposed for the BCH(15,11) code in BeiDou satellite navigation system. Several candidate information sequences were constructed by the soft-decision vector and then re-encoded in the algorithm if the error in the hard-decision result was detected. The correlation between each codeword and the soft-decision vector was calculated, and the codeword with the maximum correlation value was selected as decoding output. Simulation results show that the presented algorithm outperforms traditional hard-decision decoding at the expense of moderate complexity increase. Moreover, the storage of error-correction ROM signal is avoided. Hence, the presented algorithm is a good choice for decoding in a practical navigation receiver.
Keywords: BeiDou; BCH code; soft-decision decoding; re-encoding
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NSCT域多分辨率红外与可见光景象匹配算法
刘刚1,王光宇1,周珩2,王明静2
(1. 河南科技大学信息工程学院,洛阳 471023;2. 中国空空导弹研究院,洛阳 471009)
摘要:针对以可见光图像为基准、红外图像为实测的景象匹配问题,提出一种基于非下采样轮廓波变换(NSCT)的多分辨率匹配方法。利用相位一致性变换削弱红外与可见光图像灰度与对比度差异,对两类图像分别进行非下采样轮廓波变换,引入Krawtchouk矩不变量提取匹配特征,利用克服早熟现象的改进遗传算法作为搜索策略,以两类图像的Krawtchouk不变矩相关系数作为搜索的适应度准则,实现红外目标图像和可见光基准图像的多分辨率匹配。实验结果表明,与常用景象匹配算法相比,本文方法不仅具有更高的匹配精度和速度,而且鲁棒性好,能抵抗实测图像的旋转几何畸变。
关键词:景象匹配;非下采样轮廓波;相位一致性;Krawtchouk不变矩;遗传算法
中图分类号:TP391.41????? 文献标识码:A?????? 文章编号:1004-731X (2016) 08-1795-10
Multiresolution Scene Matching Algorithm for Infrared and Visible Images Based on Non-subsampled Contourlet Transform
Liu Gang1, Wang Guangyu1, Zhou Heng2, Wang Mingjing2
(1. College of Information Engineering, Henan University of Science and Technology, Luoyang 471023, China;fNxag8879环亚手机|首页主页
2. China Airborne Missile Academic, Luoyang 471009, China)
Abstract: Aiming at scene matching problem for taking infrared image as the actual data and the visible image as the referenced data, a multiresolution matching algorithm was proposed based on non-subsampled contourlet transform (NSCT). By using the transform of phase congruency transform, the difference of grayscale and contrast between infrared image and visible light image was weakened. Subsequently, the two types of images were separately transformed into non-subsampled contourlet domain and the proposed method took the Krawtchouk invariant moment as matching feature. The presented method, which used the improved genetic algorithm (GA) as searching strategy which conquered the precocious phenomenon, realized the multiresolution matching between infrared image and visible light image. The presented method used the relative coefficient of Krawtchouk invariant moment between the two types of images as fitness criterion for searching. Experimental results show that the proposed method has not only high matching accuracy and fast matching speed, but also better robustness in comparison with some classic matching algorithms, which can resist the geometric distortion of rotation for actual image.
Keywords: scene matching; phase congruency; non-subsampled contourlet transform; Krawtchouk invariant moment; genetic algorithm
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基于改进遗传算法的路径选择算法及仿真实现
顾键萍1,张明敏2,王梅亮1
(1. 丽水学院,丽水 323000;2. 浙江大学,杭州 310000)
摘要:传统路径最优算法把路径最短作为目标,不考虑网络拥堵和游戏区域人数等实时情况,使得算法存在局限性。根据网络游戏实际情况,提出网络游戏路径选择模型,并用改进的遗传算法仿真实现。对游戏地图与游戏相关数据进行预处理,得到游戏地图各路段实时加权长度值,通过遗传算法进行寻优求解。提出一种基于改进遗传算法的网络游戏路径选择方法,与经典算法Dijkstra相比,有效提高了路径搜索效率。
关键词:遗传算法;网络游戏;路径选择;建模与仿真
中图分类号:TP391.9????? 文献标识码:A?????? 文章编号:1004-731X (2016) 08-1805-07
Improved Genetic Algorithm-based Network Game Path Selection and Simulation
Gu Jianping1, Zhang Mingmin2, Wang Meiliang1
(1. Lishui University, Lishui 323000, China; 2. Zhejiang University, Hangzhou 310000, China)
Abstract: Traditional optimal path algorithm only sets the shortest path as the target, and it does not consider the network congestion and the number of users in game area for real-time situation, thus resulting in some limitations. According to the actual circumstance of network game, network game path selection model was proposed, and the improved genetic algorithm was employed for simulation. The method pre-processed the game map to get each road weighted length value for a real-time game map, and optimization solution was obtained through the genetic algorithm. A network game path selection method based on improved genetic algorithm was proposed compared with the classical dijkstra algorithm, effectively improving the efficiency of the path search.
Keywords: genetic algorithm; online game; path choice; modeling and simulation
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基于SVM和组合优化模型的手势识别
蔡芝蔚,吴淑燕,宋俊锋
(丽水学院工程与设计学院,浙江 丽水 323000)
摘要:针对手势识别进行了相关研究,通过采用机器学习中的SVM(Support Vector Machine)算法对手势识别中的有关特征进行了提取,再利用ANN(Artifical Neural Network)、HMM(Hidden Markov Model)和DTW(Dynamic Time Wrapping)三种手势识别算法的组合优化思想对手势进行识别。实验结果表明,组合优化模型的手势识别方法具有较好的准确率,是一种有效的手势识别方法。
关键词:手势识别;支持向量机;组合优化;特征提取;虚拟现实
中图分类号:TP 391.41????? 文献标识码:A?????? 文章编号:1004-731X (2016) 08-1812-06
Study on Hand Gesture Recognition and Portfolio Optimization Model Based on SVM
Cai Zhiwei, Wu Shuyan, Song Junfeng
(College of Engineering and Design, Lishui University, Lishui 323000, China)
Abstract: Hand gesture recognition was researched. The idea of extracting related features was proposed by using SVM algorithm in machine learning domain, and combination optimization method was used, which consists of ANN, HMM and DTW, to do hand gesture recognition. The experimental results show that portfolio optimization model based gesture recognition method has high accuracy and is very effective.
Keywords: gesture recognition; support vector machine; combinatorial optimization; feature extraction; virtual reality
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一种融合时滞值的状态估计方法及其应用
祁鹏程,赵忠盖,刘飞
(江南大学轻工过程先进控制教育部重点实验室,无锡 214122)
摘要:针对间歇过程中关键参数,在线检测精度低、离线分析时滞大的问题,提出一种融合时滞测量值的状态估计方法。鉴于在线和离线检测值的采样周期不同,分仅有在线检测值和两种检测值并存等两种情况进行分析。考虑间歇过程的非线性、非高斯分布等特点,引入粒子滤波算法并基于贝叶斯方法对其进行扩展,实现两种检测值的信息融合将提出的算法应用在啤酒发酵过程中,并与不考虑时滞测量值的估计效果对比。实验结果表明,该方法能够较好地处理考虑时滞值的状态估计问题,且效果优于不考虑时滞测量值的情况。
关键词:间歇过程;状态估计;时滞测量值;粒子滤波;贝叶斯方法;前/后向平滑
中图分类号:TN911.2????? 文献标识码:A?????? 文章编号:1004-731X (2016) 08-1818-06
State Estimation Approach by Fusing Delayed Measurements and Its Application
Qi Pengcheng, Zhao Zhonggai, Liu Fei
(Key Laboratory of Advanced Process Control for Light Industry Ministry of Education, Jiangnan University, Wuxi 214122, China)
Abstract: In batch processes, the key parameters were usually obtained online with low accuracy or offline with large time delay, and a state estimation algorithm was proposed to estimate the key parameters by incorporating delayed measurements with the real-time measurements. Due to the different sampling intervals of these two kinds of measurements, two cases were analyzed, including the case of only real-time measurements available and the case of both real-time and delayed measurements available. Considering the nature of nonlinearity and non-Gaussianity in batch processes, the particle filter algorithm was introduced for the state estimation, and it was further extended by the Bayesian method for the information fusion of these two kinds of measurements. Finally, the proposed method was applied in the beer fermentation process, and the experimental result shows that the proposed method performs well in the state estimation through incorporation of delayed measurements.
Keywords: batch fermentation; state estimation; delayed measurements; particle filtering; Bayesian method; forward-backward smoothing
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基于随机需求的冷链物流车辆路径优化模型
马向国1,刘同娟2,杨平哲3,蒋荣芬3
(1.北京物资学院物流学院,北京 101149;2.北京物资学院信息学院,北京 101149;3.北京物资学院研究生部,北京 101149)
摘要:分析了冷链物流车辆路径配送过程中的各项成本并进行修正基于客户服务时间要求与客户重要性之间的均衡,构建了混合时间窗模型基于客户需求波动降低与指派阶段成本增加之间的均衡,引入安全系数并设立约束条件,建立以总成本最小化为目标的数学模型以具体数值为例,利用Matlab软件为编码平台运用自适应遗传算法对数学模型进行求解分析。
关键词:冷链物流;车辆路径问题;随机需求;遗传算法
中图分类号:TP391.9????? 文献标识码:A?????? 文章编号:1004-731X (2016) 08-1824-10
Vehicle Routing Optimization Model of Cold Chain Logistics Based on Stochastic Demand
Ma Xiangguo1, Liu Tongjuan2, Yang Pingzhe3, Jiang Rongfen3
(1.Logistics School, Beijing Wuzi University, Beijing 101149, China; 2. School of Information, Beijing Wuzi University, Beijing 101149, China; 3. Graduate School, Beijing Wuzi University, Beijing 101149, China)
Abstract: The costs of vehicle distribution in the process of cold chain logistics is analyzed and amended; A mathematical model with mixing time window is built to balance the customers’ service request with importance level; To minimize the total cost, a mathematical model which uses a factor to make balance between the stability of customer demand fluctuation and the cost increase in the assignment phase is established. Based on MATLAB software, the optical solution is found with adaptive genetic algorithm by taking the background of a distribution center to simulate and analyze.
Keywords: cold-chain logistics; vehicle routing problem; stochastic demand; genetic algorithm
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基于实测信号的无源雷达仿真评估系统
艾小锋1,2,曾勇虎1,汪连栋1,郑光勇1,王肖洋1,王满喜1
(1. 电子信息系统复杂电磁环境效应国家重点实验室,洛阳 471003; 2. 国防科学技术大学电子信息系统复杂电磁环境效应国家重点实验室,长沙 410073)
摘要:无源雷达系统实际探测能力与实际应用场景中多种因素密切关联提出了一种基于实测信号与探测目标动态特性相结合的仿真评估方法,利用实际无源雷达接收系统获取参考通道和监视通道的环境信号,利用参考通道重构直达波,结合针对目标的运动特性和散射特性,在直达波上调制回波功率、时延、多普勒信息,得到目标回波并叠加在监视通道中得到监视信息,对参考通道和监视通道进行常规的信号处理,通过蒙特卡洛仿真获得针对目标的发现概率,可用于评估实际场景中针对特定目标的无源雷达探测能力。
关键词:无源雷达;仿真评估;实测信号;散射特性
中图分类号:TP391.9????? 文献标识码:A?????? 文章编号:1004-731X (2016) 08-1833-08
Passive Radar Simulation and Evaluation System Based on Raw Signals
Ai Xiaofeng1,2, Zeng Yonghu1, Wang Liandong1, Zheng Guangyong1, Wang Xiaoyang1, Wang Manxi1
(1. State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System, Luoyang 471003, China; 2. State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System, National University of Defense Technology, Changsha 410073, China)
Abstract: Detection ability of the passive radar is very closely related with many factors in the real aplication. A method was proposed based on the raw data and the dynamic characteristics of a specific target. In this method, the reference and the surveillance channels' signals were obtained through the actual passive radar receiving system. The direct-path signal was reconstructed by using the reference signal. The target echo was obtained by modulating the direct-path signal with the echo power, delay and Doppler parameters, which was calculated with the move and scattering characteristics of target. Adding the target echo to surveillance channel, the final monitoring information was obtained. The conventional signal processing was applied on the reference channel and surveillance channel, and the detection probability of specific target was obtained through Monte Carlo simulation. This method can be used to evaluate detection ability of passive radar in the actual scene for specific target.
Keywords: passive radar; simulation evaluation; raw signal; scattering characteristics
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软翼飞行器多体动力学建模与运动特性分析
张昊,陈自力,邱金刚
(军械工程学院无人机工程系,石家庄 050003)
摘要:软翼飞行器以其优越的飞行性能和应用优势已渐渐成为新型飞行器领域的研究热点。针对软翼飞行器两点柔性连接的特殊结构,考虑软翼附加质量与两体间相对运动,提出了一种八自由度(Degrees Of Freedom, DOF)非线性动力学模型分别仿真分析了模型在稳定滑翔状态下对马力变化、单侧下偏与双侧下偏操作的响应情况飞行特性,结果表明软翼飞行器的操纵动作会引起两体间不同程度的相对运动,进而验证模型的正确性与适用性。
关键词:软翼飞行器;多体;动力学建模;仿真分析
中图分类号:V211.4??? ???文献标识码:A?????? 文章编号:1004-731X (2016) 08-1841-05
Modeling and Motion Analysis of Multi-bodies Dynamic of Unmaned Parafoil Vehicle
Zhang Hao, Chen Zili, Qiu Jingang
(Department of UAV Engineering, Ordnance Engineering College, Shijiazhuang 050003, China)
Abstract: Unmanned Parafoil Vehicle (UPV) has gradually become a hotspot in the flexible wing vehicle research filed for its superior fight performance and advantages in application. An eight degrees of freedom (DOF) nonlinear dynamic model of UPV in mechanism law was proposed, aiming at the structure characteristics of the two flexible connections, and considering the added mass of canopy and the relative motion of two bodies. The response of model to different levels of thrust changes was simulated and analyzed, pulling a single steering line and pulling the left and right steering lines of canopy symmetrically on the steady state of gliding. The simulation results illustrate that operator will cause the relative motion between two bodies which cannot be ignored, and also verify the validity and utility of model.
Keywords: unmanned parafoil vehicle; multi-bodies; dynamic modeling; simulation analysis
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可修复k/n表决系统随时间的生命状态分析与仿真
方永锋1,陈建军2
(1. 贵州工程应用技术学院机械工程学院,贵州 毕节551700;2. 西安电子科技大学机电工程学院,陕西 西安 710071)
摘要:由于根据人为经验给出k/n表决系统中k的设置具有随意性,根据系统单元承受的作用概率分布,利用应力-强度干涉理论,给出了单个单元的失效概率,由单元工作时的可靠与失效状态的转移情况,利用概率微分方程,建立了可修复k/n表决系统的动态可靠性预测模型,并给出了该模型的解。对可修复k/n表决系统中最少工作单元数目k的设置给出了理论依据。通过对算例的分析,表明了所建模型的准确性与可行性。
关键词:可修复;k/n表决系统;动态可靠性;生命状态;预测模型;仿真
中图分类号:Th122??? ???文献标识码:A?????? 文章编号:1004-731X (2016) 08-1846-08
Repairable k/n Voting System Life Situation Model Analysis and Simulation from Time Response
Fang Yongfeng1, Chen Jianjun2
(1. School of Mechanical Engineering, Guizhou University of Engineering Science, Bijie 551700, China; 2. Ministry of Education Key Lab. of Electronic Equipment Structure, Xidian University, Xi’an 710071, China)
Abstract: For the k of k/n system is given according to the one’s experience in the current, the probability of the failure of the singular system components was given according to the stress-strength interference theory and the load distribution of the component withstand. The dynamic reliability prediction model of the repairable k/n system was established by using probabilistic differential equations and by the repairable system components moving in reliable and failure. The equation was solved and their answers were shown to give the precisely k when the k would be determined. The model shows accuracy and feasibility by analysis of the example.
Keywords: repairable; k/n voting system; dynamic reliability; life situation; prediction model; simulation
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一种胆囊切除虚拟手术仿真训练平台研究
汪军1,刘冬2
(1. 安徽工程大学计算机与信息学院,芜湖 2410002. 皖南医学院弋矶山医院信息中心,芜湖 241000)
摘要:实时性、变形逼真、手感真实是虚拟手术具有沉浸感的主要因素。从这些要素出发搭建了一种具有力反馈手感的胆囊切除虚拟手术仿真训练平台,在实时性上,提出一种不同的模型采用不同的包围盒碰撞检测的Capsule-Sphere混合碰撞检测方法;在受力变形上提出一种网格-骨架模型的质点弹簧形变方法;并在前期研究的虚拟手术力反馈手柄上进行了测试。实验结果表明将这两种模型应用于胆囊切除虚拟手术研究中仿真训练平台能动态、实时、逼真地模拟软组织的变形过程力反馈手感真实稳定。
关键词:虚拟手术;力反馈;碰撞检测;变形
中图分类号:TP391.1??? ???文献标识码:A?????? 文章编号:1004-731X (2016) 08-1853-10
Research on Cholecystectomy Virtual Surgery Simulation Training Platform
Wang Jun1, Liu Dong2
(1. School of Computer & Information Science, Anhui Polytechnic University, Wuhu 241000, China; 2. Information Center, Yijishan hospital of Wannan Medical College, Wuhu 241000, China)
Abstract:The main performance factors in virtual surgery system with immersion are real-time, realistic deformation and smooth feel handle. A kind of cholecystectomy simulation training platform with force feedback feel was built, putting forward a kind of collision detection method based on Capsule-Sphere mixture model of different model with different bounding box in the real-time and a kind of mass-spring deformation method based on mesh-skeleton model in the force-deformation, and being tested on the virtual surgery force feedback device in prophase research. The experimental results show that the two modes are applied to the virtual cholecystectomy simulation and the platform can simulate the real-time realistic soft tissue deformation process and stability force feedback feel.
Keywords: virtual surgery; force feedback; collision detection; deformation
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基于奇异谱分析—SVM的木构件缺陷识别
周国雄1,陈爱斌1,周先雁2
(1. 中南林业科技大学计算机信息工程与学院,长沙,410004;2. 中南林业科技大学土木工程与力学学院,长沙,410004)
摘要:针对木构件缺陷的未知性,提出一种基于奇异谱分析—SVM的木构件缺陷识别方法,采用超声波测试仪对木材试件进行测试,获取测试信号,为消除探伤时由于测试仪增益调节及缺陷尺寸、角度的变化对测试缺陷回波波高的影响,采用奇异谱分析,过滤异常随机波动,并从中提取出表征原始信号的特征参数,采用改进的SVM算法对特征参数进行网络训练,识别木构件缺陷类型。测试结果表明该方法区分标准试样和胶缝试件的准确率为97.5%,在识别死节试件时也达到了95%,具有较高的准确率。
关键词:缺陷识别;奇异谱分析;SVMPSO
中图分类号:TP229????? 文献标识码:A?????? 文章编号:1004-731X (2016) 08-1863-07
Wood Structure Nondestructive Detection Based on Singular Spectrum Analysis and SVM
Zhou Guoxiong1, Chen Aibin1, Zhou Xianyan2
(1. School of Electricity & information Engineering, Central South University of Forestry & Technology, Changsha 410004, China; 2. College of Civil Engineering and Mechanics, Central South University of Forestry and Technology, Changsha 410004, China)
Abstract: In view of unknown defect of wood component defect, a method of wood structure nondestructive recognition based on Singular spectrum analysis and SVM was proposed. The wood specimen was tested to obtain the test signal by ultrasonic testing instrument. In order to eliminate the testing effect of the tester gain control and defect size, angle variation on the test defect echo amplitude, the abnormal fluctuation was to filter and characteristic of the original signal was extracted by singular spectrum analysis, and SVM could train the parameters and distinguish the wood defects. Simulation results show that the proposed method can distinguish standard samples and glue joint with accuracy of specimen for 97.5%, and recognition of knots specimens also reaches 95% with high accuracy.
Keywords: defect recognition; singular spectrum analysis; SVM; PSO
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机载相控阵天气雷达回波仿真与分析
王磊1,于超鹏2,刘平3
(1. 四川省气象探测数据中心,成都 610072; 2. 中国航空工业集团公司雷华电子技术研究所,无锡 214063;
3. 四川省气象局四川省人工影响天气办公室,成都 610072; 4. 高原与盆地暴雨旱涝灾害四川省重点实验室,成都 610072)
摘要:分析了天线增益、波束宽度、脉冲宽度及衰减等因素对雷达气象方程的影响。选取新一代天气雷达(CINRAD/SA)的反射率因子,结合订正后的雷达气象方程和飞行观测参数,仿真模拟机载相控阵天气雷达水平扇扫和垂直扇扫的反射率因子。对比分析表明:在径向上,采用脉冲压缩技术的机载相控阵雷达的距离分辨率要高于新一代天气雷达;在切向上,由于天线增益及波束宽度随指向角的变化,导致机载相控阵雷达数据平滑效果明显,探测精度低于新一代天气雷达。采用回波衰减订正法后,机载相控阵天气雷达反射率因子可信度较高,有助于为飞行员提供更为准确的危险天气预警
关键词:机载相控阵雷达;权重插值;仿真算法;脉冲压缩;回波衰减
中图分类号:P415.2??? ???文献标识码:A?????? 文章编号:1004-731X (2016) 08-1869-09
Simulation and Analysis of Airborne Phase Array Weather Radar Reflectivity
Wang Lei1, Yu Chaopeng2, Liu Ping3
(1. Sichuan Meteorological Sounding Data Center, Chengdu 610072, China; 2. Avic LEIHUA Electronic Technology Research Institute, Wuxi 214063, China; 3. Weather Modification Office of Sichuan Province, Sichuan Meteorological Bureau, Chengdu 610072, China; 4. Heavy Rain and Drought-Flood Disasters in Plateau and Basin Key Laboratory of Sichuan Province, Chengdu 610072, China)
Abstract: The relation between radar parameters such as radar gain, beam width and impulse width and radar reflectivity based on the parameters of airborne phase array weather radar at X-band were proposed. Combined with weather radar equation correction and flight parameters, horizontal sector scanning and vertical sector scanning reflectivity data of airborne phased array weather radar were simulated based on new generation weather radar (CINRAD/SA) reflectivity. The results show that along the radial direction, the distance resolution of airborne phase array radar used impulse compress technology is higher than new generation weather radar and along the shear direction, because antenna gain and beam width changing with the elevation, the smooth effect of the phase array radar data is obvious and its sounding accuracy is lower than new generation weather radar. On the other hand, after adopting the echo attenuation correction method, the credibility of airborne phased array weather radar reflectivity is higher, which provides more accurate dangerous weather warning for the pilots.
Keywords: airborne phase array radar; weighted interpolation; simulation algorithm; impulse compress; echo attenuation
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一类时变无线网络控制系统分析与仿真研究
邓玮璍1,费敏锐2
(1.上海电力学院电气工程学院,上海 200090;2.上海大学上海机电工程与自动化学院, 上海 200072)
摘要:研究了一类具有IEEE802.11b无线网络通道特性和时变特性的离散系统镇定及数值仿真问题。分别建立了刻画IEEE802.11b无线网络通道时滞的逆高斯分布模型和系统时变特性的不确定参数模型设计了基于模型的状态反馈控制器以补偿网络延时和时变性对系统的影响。同时分析了离散时变网络控制系统的随机稳定性,并给出了线性矩阵不等式形式的控制器求解条件。通过数值仿真分析,验证了所提方法的有效性。
关键词:网络控制系统;时变系统;逆高斯分布模型;基于模型的控制
中图分类号:TP273????? 文献标识码:A?????? 文章编号:1004-731X (2016) 08-1878-06
Analysis and Simulation of a Class of Time-varying Wireless Networked Control Systems
Deng Weihua1, Fei Minrui2
(1. College of Electrical Engineering Shanghai University of Electric Power, Shanghai 200090, China; 2. Shanghai University, Shanghai 200072 China)
Abstract: The problem of stabilization was investigated for a class of discrete time-varying systems over a physical IEEE 802.11b wireless channel. The wireless network-induced delays were characterized by an inverse Gaussian distribution model (IGDM) and the time-varying nature was depicted by uncertain parameter model. The model-based state feedback controller was designed to compensate the influence of delays and time-varying nature. And the stochastic stabilisability of discrete time-varying networked control system was analyzed and the solution of controller was given in the form of linear matrix inequalities (LMIs). The effectiveness of the proposed methods was illustrated by numerical simulation examples.
Keywords: networked control system; time-varying system; inverse gaussian distribution model; model-based control
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在线手绘态势图的分割和识别
邓维1,2,吴玲达1,张友根3,杨超1
(1.装备学院复杂电子系统仿真实验室,北京 101416;2.75711部队,广州 510515;3.国防信息学院信息系统系,武汉 430010)
摘要:当前对在线手绘军标识别的研究通常以单个孤立的样本作为识别对象。在实际的笔式标绘应用中,以整幅手绘态势图作为对象进行分割和识别有助于保持用户思维连贯性,但对识别算法提出了更大的挑战。分析了手绘态势图的特点和分割难点,提出一种基于动态规划的分割和识别方法。通过基于最小生成树的笔画聚类对态势图进行粗分割;通过置信度转换和融合的方法综合利用单图符识别信息和几何信息,计算候选分割路径的评价准则;采用动态规划搜索最优分割路径。实验表明了方法的有效性,该方法有助于扩展草图识别的应用范围。
关键词:草图识别;分割;态势图;军标图符;动态规划
中图分类号:TP391????? 文献标识码:A??? ???文章编号:1004-731X (2016) 08-1884-08
Segmentation and Recognition of Hand-drawn Situation Maps
Deng Wei1,2, Wu Lingda1, Zhang Yougen3, Yang Chao1
(1. Science and Technology on Complex Electronic System Simulation Laboratory, Equipment Academy, Beijing 101416, China; 2. Unit 75711 of PLA, Guangzhou 510515, China; 3. Department of Information Systems, Academy of National Defense Information, Wuhan 430010, China)
Abstract: Most of current research on online sketched military symbol recognition concerns the isolated samples. In pen-based situation marking systems, users prefer segmenting and recognizing the full sketched situation maps. However, it is a more difficult problem. The characteristics of hand-drawn situation maps and difficulties to segment them were analyzed, and a dynamic programming-based approach was proposed. A hand-drawn situation map was segmented coarsely by minimum spanning tree-based stroke clustering. The candidate segmentation path was evaluated by synthesizing geometric analysis and isolated symbol classifier together, using confidence transformation and fusion. The dynamic programming algorithm was used to search the optimal segmentation and recognition result. Experimental results demonstrate that the proposed method is effective, which extends the applications of sketch recognition.
Keywords: sketch recognition; segmentation; situation maps; military symbols; dynamic programming
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心脏起搏器谐振式无线能量传输系统仿真分析
刘修泉1,李艳红1,黄平2
(1. 广州番禺职业技术学院机电工程学院,广州 511483;2. 华南理工大学机械与汽车工程学院,广州 510640)
摘要:针对植入式心脏起搏器电池供能时间有限的缺点和电磁感应无线供能在实际应用上的不足,提出了谐振式无线能量传输技术,介绍了植入式心脏起搏器谐振式无线能量传输系统的工作原理,基于磁耦合谐振原理和电路互感计算模型,建立了植入式心脏起搏器的谐振式无线能量传输系统数学模型,引入了空心线圈互感计算的精确公式,分析了轴向距离、径向偏移和线圈半径对系统传输性能的影响,这些结果对于合理设计心脏起搏器的无线能量耦合参数和优化系统传输性能提供了重要理论指导和参考。
关键词:无线能量传输;谐振;磁耦合;心脏起搏器
中图分类号:TH39????? 文献标识码:A?????? 文章编号:1004-731X (2016) 08-1892-06
Simulation Research on Wireless Power Transmission System of Cardiac Pacemaker Based on Magnetic Resonance
Liu Xiuquan1, Li Yanhong1, Huang Ping2
(1. School of Mechanical and Electronic, Guangzhou Panyu Polytechnic, Guangzhou 511483, China; 2. School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, China)
Abstract: Aiming at disadvantages of the battery limited supply time of the implantable cardiac pacemaker and the actual application of electromagnetic induction wireless power transmission (WPT) system, the resonant WPT technology was proposed. The basic working principle of a WPT system of the implantable cardiac pacemaker was introduced. Based on Magnetic resonance coupling and mutual inductance calculation model, the mathematics models of the WPT system of the cardiac pacemaker were established. By the accurate formulae of the mutual inductance of the primary and secondary coreless coils, the influences of the parameters, such as the axial distance, radial offset and coli radius, on the WPT performances were studied. And these results could provide an important theoretical guidance and reference for the design of the cardiac pacemakers coupling parameters and optimizing of the system performance.
Keywords: wireless power transmission; resonance; magnetic coupling; cardiac pacemaker
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基于SRV-CLS的稳健可控频率不变波束形成
陈苏婷1,2,张伟1
(1.南京信息工程大学江苏省气象探测与信息处理重点实验室,江苏 南京 210044;2.大气环境与装备技术协同创新中心,江苏 南京 210044
摘要:频率不变波束形成器在宽带阵列信号处理中有着十分重要的应用。经典的频率不变波束形成器的设计方法没有考虑实际情况中麦克风通道间存在的失配误差,导致波束形成器在实际应用中的频率不变性能变差。为了解决该问题,提出一种基于SRV-CLS的稳健可控频率不变波束形成器的设计方法该方法将基于SRV-CLS的频率不变波束形成器设计方法与宽带波束形成稳健算法的思想相结合将麦克风特性的统计信息作为稳健因子加入代价函数中,有效克服了因麦克风通道间存在失配误差而引起的波束形成器性能变差,保证了在波束形成器在工作频带内的频率不变性良好,并且适用于任意阵列结构和具有任意主瓣形状的宽带波束形成器设计。
关键词:波束形成;频率不变;稳健性;约束最小二乘
中图分类号:TP391.9????? 文献标识码:A??? ???文章编号:1004-731X (2016) 08-1898-06
Robust Steerable Frequency Invariant Beamformer Design Based on SRV-CLS
Chen Suting1,2, Zhang Wei1
(1. Jiangsu Province Key Laboratory of Meteorological Observation and Information Processing in Nanjing University of Information Science & Technology, Nanjing 210044, China; 2. Atmospheric Environment and Equipment Technology Synergy Innovation Center, Nanjing 210044, China)
Abstract: The frequency invariant beamformer (FIB) has important applications in wideband array signal processing. Conventional FIB design approaches are usually proposed without considering the mismatches in microphone array characteristic, which leads to the performance of the FIBs degrading in practical applications. Therefore, a robust steerable frequency invariant beamformer design approach based on spatial response variation constrained least squares (SRV-CLS) was proposed. It combined the SRV-CLS FIB design approach with classical robust beamforming algorithm, and added the microphone characteristics as robust favor in the cost function. The proposed approach could work well in the presence of microphone mismatches, ensured the frequency invariant of the beamformers in the operating band, and is applicable to arbitrary main lobe width and array geometries.
Keywords: beamforming; frequency invariance; robustness; constrained least squares
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基于Kinect的头部康复虚拟现实游戏
沈淑涛1,高飞2,许宁1
(1.西藏大学藏文信息技术研究中心,西藏 拉萨 850000;2.西藏大学科研处,西藏 拉萨 850000
摘要:虚拟现实在康复中的应用被广泛研究,有助于中风后的患者独立地完成日常生活活动,同时节省时间、金钱和其他成本。Microsoft Kinect用于虚拟现实游戏来评估用户的运动动作。游戏规则要求外侧头、躯干和手臂的运动。在设定的9个游戏练习中,平均值和最大移动量保持不变。但是,随着练习的增加,头部运动的频率增大。结果显示通过头部运动,视频游戏可以用于姿态平衡康复,同时还表明头部运动对前庭系统有影响。在以后的工作中将评估前庭运动以及头部运动频率随练习的增加将如何支持姿态平衡改进。
关键词:头部动作;姿态控制;视频游戏;虚拟现实康复
中图分类号:TP391.9?? ?????文献标识码:A??? ???文章编号:1004-731X (2016) 08-1904-05
Virtual Reality Game for Head Rehabilitation Based on Kinect
Shen Shutao1, Gao Fei2, Xu Ning1
(1. Tibetan Information Technology Research Center, Tibetan University, Lhasa 850000, China; 2. Department of Scientific Research University of Tibet, Tibetan University, Lhasa 850000, China)
Abstract: The application of virtual reality in the rehabilitation has been extensively studied, which helps patients after a stroke independently perform daily living activities, while saving time, money and other costs. This study used Microsoft Kinect virtual reality game to assess the movement of the users. The game required movement outside of the head, torso and arms. In nine games exercise, the average and maximum amount of movement remained unchanged. However, with the increase of exercise, the frequency of head movement increased. The results show that by head movement, video games can be used to balance the posture rehabilitation, but also shows the impact of head movement on the vestibular system. In the future work, it is evaluated how to support posture balance improvement that the increases frequency of vestibular system and head movement with exercise.
Keywords: head motion; pose estimation; video game; virtual rehabilitation
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基于分支定界法的进场航空器动态排序与调度
张军峰,王菲,葛腾腾
(南京航空航天大学民航学院,江苏 南京 210016)
摘要:进场航空器优化排序和调度是跑道资源合理分配和充分利用的前提,是提高终端空域运行效率的基础。通过基于时间触发的滑动时间窗实现了进场动态排序。在精确四维航迹预测的基础上,结合管制运行约束,采用分支定界法对时间窗内航班进行优化排序与调度。以上海浦东机场为例进行仿真验证,将优化结果分别同先到先服务算法结果与航班的实际到达时间进行对比。结果表明:该算法可有效地提高跑道容量,缓解航班延误,是实现跑道资源优化配置的有效方法。
关键词:交通运输规划;排序与调度;滑动时间窗;分支定界;决策支持
中图分类号:V355??????文献标识码:A?????? 文章编号:1004-731X (2016) 08-1909-06
Dynamic Arrival Sequencing & Scheduling Based on Branch & Bound Algorithm
Zhang Junfeng, Wang Fei, Ge Tengteng
(School of Civil Aviation, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China)
Abstract: Optimization of arrival sequencing and scheduling is not only the prerequisite for properly allocating and fully utilizing the runway resource, but also the fundamental element for improving terminal operation efficiency. Dynamic arrival sequencing was obtained by time-triggered sliding time window method. On thebasis of accurate 4D trajectory prediction, branch and bound algorithm was adopted to generate an optimal sequence, combined with the actual operation constraints. Taking Shanghai Pudong Airport as an example for simulation, the optimization results were compared with the actual landing time and simulation results based on first come first serve strategy. The results indicate that the proposed algorithm could effectively not only enhance the runway capacity but also alleviate flight delays, and could be an effective method to realize runway resource proper allocation.
Keywords: transportation planning; sequencing and scheduling; sliding time window; branch and bound algorithm; decision support
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一个分数阶超混沌系统同步及其保密通信研究
薛薇,徐进康,贾红艳
(天津科技大学电子信息与自动化学院,天津 300222)
摘要:应用单向耦合同步的方法对所给出的一个同量分数阶超混沌系统的自同步进行设计和实现,并从理论上分析了该同步方法的正确性和有效性。另外,以3.6阶超混沌系统为例,利用基于Bode图频域近似的方法,对该分数阶超混沌系统及其单向耦合同步系统进行模拟电路设计与实现,得到的电路实现结果与数值仿真结果一致,验证了该单向耦合同步是实际可行的。在此基础上,进一步对基于该耦合同步的混沌掩盖保密通信方案进行分析研究,得到的数值仿真结果和实际电路实验结果吻合,表明该保密通信方案有效可行,且具有良好的保密性。
关键词:分数阶超混沌系统;单向耦合同步;保密通信;电路实现;数值仿真
中图分类号:TP391.9????? 文献标识码:A?????? 文章编号:1004-731X (2016) 08-1915-08
Study of Synchronization for Fractional-order Hyperchaotic System and Its Application in Secure Communication
Xue Wei, Xu Jinkang, Jia Hongyan
(School of Electronic Information and Automation, Tianjin University of Science and Technology, Tianjin 300222, China)
Abstract: A unidirectionally coupled synchronization method was adopted to design and implement the synchronization for the reported commensurate fractional-order hyperchaotic system, and its correctness and effectiveness were analyzed in theory. Moreover, taking an example of 3.6-order hyperchaotic system, analog circuits were designed to implement the fractional-order hyperchaotic system and its unidirectionally coupled synchronization with the frequency-domain approximation method based on Bode diagram. By conducting the circuit implementation, it is found that the results of the circuit implementation are in good agreement with those of the numerical simulation, which demonstrates the feasibility of the synchronization. On this basis, a secure communication scheme of chaotic masking based on the adopted synchronization method is investigated, and the circuit experiment results agree with the numerical simulation results, indicating that the secure communication scheme is effective and has good secrecy.
Keywords: fractional-order hyperchaotic system; unidirectionally coupled synchronization; secure communication; circuit implementation; numerical simulation
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大当量装药外爆对大楼破坏过程仿真研究
赵未平1,葛贤坤1,2,刘传武1,祝逢春1
(1.中国人民解放军95856部队,南京 210028;2.南京理工大学机械工程学院,南京 210094)
摘要:采用Autodyn仿真软件中的SPH粒子算法,模拟大楼在大当量装药外部爆炸时产生崩落碎块的动态毁伤效应,提供可视化效果。通过单体构件仿真展示钢筋混凝土和砖砌体结构不同时刻的动态破坏细节,获得了冲击波超压数值、碎块崩落速度和动能值。通过数值模拟得出,崩落碎块速度最高可达152 m/s,动能18 000 J,对建筑物内人员及设备有很大杀伤破坏能力。在同等当量的外爆条件下,崩落碎块速度砖砌体结构大于钢筋混凝土,整体平均速度要大25%左右;墙体所受超压及反射超压,钢筋混凝土远大于砖砌体,平均大于76%以上。为大楼的毁伤评估提供了科学经济的预测手段。
关键词:数值仿真;外部爆炸;冲击波;毁伤效果;崩落速度;砖砌体
中图分类号:TP391.9????? 文献标识码:A??? ???文章编号:1004-731X (2016) 08-1922-07
Simulation Study on External Explode of Large Equivalent Charge on Large Buildings
Zhao Weiping1, Ge Xiankun1,2, Liu Chuanwu1, Zhu Fengchun1
(1. The Chinese People's Liberation Army 95856, Nanjing 210028, China; 2. College of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China)
Abstract: The particle algorithm in AUTODYN,Smoothed Particle Hydrodynamics (SPH), was used to simulatedynamic damage of the external explosion on large buildings, which provided a visual effect. The dynamic damage details of reinforced concrete and brick masonry structure at different time were proposed by the simulation of single component. Additionally, the overpressure of shock wave, caving velocity and kinetic energy were obtained. It shows that the caving can speed up to a maximum value of 152 m/s with the kinetic energy of 18 000 J, that means a great damage to personnel and equipment in the building. Under the same condition of external explosion, the caving velocity of brick masonry structure is 25% higher than that of concrete. The overpressure and reflective overpressure on the concrete is 76% higher than that on the brick masonry. This work provides scientific and economic prediction methods for damage assessment of buildings.
Keywords: numerical simulation; external explosion; shock wave; damage effect; collapse velocity; brick masonry
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