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ON THE CALCULATION OF STRESS INTENSITY FACTOR K FOR FRAME COMPONENTS

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Journal of Central South university 1995年第2期7卷 37-41页

作者： Liu Yilun Wang Ailun(college of {1. and {2. engineering, Central South university of Technology, Changsha, 41.083, China)He Manjiang(Changsha Institute of mining Research) 1. college of {1. and electrical engineering Central South University of Technology 410083 Changsha China 2. Changsha Institute of mining Research China

The stress intensity factor K in the tip of crack which is in the corner of the frame component has been calculated indirectly by means of numeric calculation of J Integral. Some laws and relationships among the stres... 详细信息

关键词： intensity factor J Integral frame component

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五杆式人机合作机器人控制策略仿真研究

系统仿真学报 2008年第20期20卷 5596-5599页

作者：路敦民张立勋杨向东陈恳北京林业大学工学院北京100083 哈尔滨工程大学机电工程学院黑龙江哈尔滨150001 清华大学精仪系北京100084

轨迹控制策略是人机合作机器人实现人机合作的重要条件。介绍了五杆Cobot的机构及其控制系统,提出了基于速度约束和位置约束的人机合作机器人轨迹控制策略,建立了相应的控制模型。两种控制策略均具有被动和约束的特征,主要区别是产生控... 详细信息

轨迹控制策略是人机合作机器人实现人机合作的重要条件。介绍了五杆Cobot的机构及其控制系统,提出了基于速度约束和位置约束的人机合作机器人轨迹控制策略,建立了相应的控制模型。两种控制策略均具有被动和约束的特征,主要区别是产生控制量的方法不同。利用MATLAB对两种控制策略跟踪直线和圆弧轨迹进行了仿真,结果表明,两种控制策略均可实现人机合作的要求,但位置约束控制策略轨迹约束精度更高一些。

关键词：人机合作机器人虚拟轨迹控制控制策略速度约束位置约束

Application of Data mining Model Based on Bayesian Artificial Neural Network in Fault Diagnosis for Hydraulic Generators

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Application of Data Mining Model Based on Bayesian Artificia...

第二十四届中国控制会议

作者： Qiaoling Ji~1. Weiyou Cai~1. Weimin Qi~1. Zhong Cao~2. Guangda Chen~1.1. college of Power and {1. engineering, Wuhan university, Wuhan, 430072. Three Gorgers Power Station, Yichang, 4431.3

＜正＞ In this paper, based on the combination of Bayesian decision rules and artificial neural network, a hierarchical modular diagnosis network is proposed with respect to data mining approach for fault diagnosis and prediction of hydraulic generators. The data mining model based on Bayes-neural network was established and the simulation result shows that our new data mining methods is effective and applicable for fault diagnosis of hydropower units.

关键词： Bayesian decision rules artificial neural network data mining, fault diagnosis hydraulic generators

A Hybrid Simplex Differential Evolution Algorithm

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A Hybrid Simplex Differential Evolution Algorithm

2.1. Chinese Control and Decision Conference

作者： Lianghong Wu~(1.2.,Yaonan Wang~2.Xiaofang Yuan~2.Shaowu Zhou~1.1.School of Information and electrical {1.,Hunan university of Science and Technology,Xiangtan 41.2.1.China 2.college of electrical and Information {1.,Hunan university,Changsha 41.082.China

＜正＞According to the disadvantage of slow convergence rate of the basic differential evolution（DE） algorithm, a hybrid optimization algorithm incorporated Nelder ＆ Mead（NM） simplex method into the basic DE algorithm is presented in this *** hybrid procedure performed the exploration with DE and the exploitation with the NM simplex *** to the control parameters of the proposed approach is *** computational results on several classical Benchmarks nonlinear complex functions show that the hybrid optimization algorithm is superior to the two original search techniques（*** and DE） in terms of solution quality and convergence *** with other DE variants,the proposed algorithm has better convergence performance and *** Wilcoxon non-parametric statistical tests also confirm the above claims.

关键词： Differential evolution Simplex method Hybrid optimization algorithm non-parametric statistical

A Domain Ontology-based Information Retrieval Approach for Technique Preparation

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A Domain Ontology-based Information Retrieval Approach for T...

2.1. 2.d International Conference on Multimedia and Computational Intelligence (ICMCI 2.1.)

作者： Liu Xinhua1.Zhang Xutang2.Li zhongkai1.1.School of mechanical and {1. engineering 2.School of Mechatronics engineering China university of mining and Technology Harbin Institute of Technology xuzhou Jiangsu Province China Harbin Heilongjiang Province China

In order to realize information sharing and information reuse of technique preparation process, idea of domain ontology was applied in technique preparation process. The concept of technique preparation domain ontology was proposed and its structure was designed. Moreover, the information retrieval framework for technique preparation based on domain ontology was put forward and the flowchart of the proposed approach was designed. Furthermore, the similarity relation between concepts was elaborated and the similarity computing approach of domain ontology was designed to resolve the problem of technique preparation information similarity. Finally, an application case was illustrated and the information retrieval approach was proved efficient.

关键词： Technique Preparation Information Retrieval Domain Ontology Similarity Computing

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改进的协同粒子群优化算法的研究与应用

振动．测试与诊断 2012年第3期32卷 483-487,519-520页

作者：陈如清杨妍嘉兴学院机电工程学院嘉兴314001 华东理工大学自动化研究所上海200237

为增强现有PSO算法和协同粒子群优化算法的优化性能,提出了一种改进的协同粒子群优化算法及一种新的协同策略。该算法在进化过程中,将寻优粒子群分解为若干子分群,各子分群粒子利用本分群经验和整个种群经验进行搜索,既能在分群内部不... 详细信息

为增强现有PSO算法和协同粒子群优化算法的优化性能,提出了一种改进的协同粒子群优化算法及一种新的协同策略。该算法在进化过程中,将寻优粒子群分解为若干子分群,各子分群粒子利用本分群经验和整个种群经验进行搜索,既能在分群内部不断搜索,不迷失寻优方向,又能周期性地共享整群最优值引导粒子找到最好解。分解为多个子种群有利于维持种群的多样性,有效抑制局部最优现象发生。对经典复杂函数的寻优测试表明,改进算法的鲁棒性、收敛速度、精度及全局搜索能力均优于基本PSO算法。最后将改进算法用于建立基于神经网络的旋转机械故障诊断模型,设计了相应的故障诊断系统。结果表明,基于此算法的故障诊断系统具有诊断精度较高、稳定性能较好等特点。

关键词：粒子群优化算法协同进化旋转机械神经网络故障诊断

Identification of Countercurrent Rare Earth Extraction Process based on State-space Model

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Identification of Countercurrent Rare Earth Extraction Proce...

2.1. Chinese Control and Decision Conference

作者： ZHONG Lusheng~(1.2.,FAN Xiaoping~1.YANG Hui~2.1.college of Information Science and {1.,Central South university,Changsha 41.083,China 2.college of electrical and Electronic {1.,East China Jiaotong university,Nanchang Jiangxi 33001.

＜正＞In this paper,the identification problem of linear state-space models is considered for the rare earth extraction *** parameter is determined by minimization of output error cost *** addition,the nonuniqueness of the fully parameterized state-space is considered and the parameter update is restricted to the direction that changes the input-output behavior of the system by orthogonal gradient ***,the convergence speed of the proposed algorithm is also ***,industrial experiment of rare earth extraction process is implemented and the results show the efficiency of the proposed method.

关键词： System Identification Parameter Estimation Rare Earth State-Space Model

Evolutionary generation of test data for many paths coverage

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Evolutionary generation of test data for many paths coverage

2.1. Chinese Control and Decision Conference

作者： Wan-qiu Zhang~1.Dun-wei Gong~1.Xiang-juan Yao~(1.2.,Yan Zhang~(1.3) 1.School of Information and electrical {1.,China university of mining and Technology,xuzhou,2.1.1.,China 2.college of Sciences,China university of mining and Technology,xuzhou,2.1.1.,China 3.Department of Computer Science and Technology,Mudanjiang Normal university,Mudanjiang,Heilongjiang 1.701.,China

＜正＞Generation of test data for path coverage is an important issue of software testing,but previous methods are only suitable for the case that a program only has a small number of *** focus on the problem of generating test data for many paths coverage in this paper,and present a method of evolutionary generation of test data for many paths ***,target paths are divided into several groups based on their similarity,and each group forms a sub-optimization problem,which transforms a complicated optimization problem into several simpler sub-optimization problems;then a domain-based fitness is designed when genetic algorithms are employed to solve these problems;finally,these sub-optimization problems are simplified along with the process of generating test data,hence improving the efficiency of generating test *** method is applied in 2.benchmark programs,and compared with some previous *** experimental results show that our method has advantage in time-consumption and the number of uncovered target paths. Our achievement provides an efficient way for generating test data of complicated software.

关键词： software testing many paths coverage test data genetic algorithms grouping

薄滚筒内二元湿颗粒体系混合行为的离散单元模拟研究

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物理学报 2011年第12期60卷 325-332页

作者：高红利陈友川赵永志郑津洋浙江大学化学工程与生物工程学系杭州310027 广东石油化工学院机电工程学院茂名525000

采用所建立的四方程线性弹性-阻尼离散单元模型,同时考虑了液桥力的作用,对填充量为40%、含液量为3%的水平薄滚筒内S型(不同直径颗粒)二元湿颗粒体系混合过程进行了数值模拟,并与同等操作条件下不含液的干颗粒体系的混合行为进行了比较... 详细信息

采用所建立的四方程线性弹性-阻尼离散单元模型,同时考虑了液桥力的作用,对填充量为40%、含液量为3%的水平薄滚筒内S型(不同直径颗粒)二元湿颗粒体系混合过程进行了数值模拟,并与同等操作条件下不含液的干颗粒体系的混合行为进行了比较,分析了液体对颗粒体系混合行为的影响.同时还将计算结果与文献中的实验结果进行了比较.结果表明,由于湿颗粒间液桥力的牵引作用使不同性质的颗粒不易分离,使部分颗粒聚结成团,减弱了离析作用的影响,使得滚筒内湿颗粒的混合程度高于相同条件下的干颗粒体系,且接触力的分布较干颗粒体系更加均匀.通过对混合过程的模拟,直观地反映了混合过程中颗粒的微观运动特性和内部的力学结构,为研究湿颗粒体系混合过程机理提供了依据和参考.

关键词：湿颗粒体系混合分离离散单元法