检索结果-内蒙古大学图书馆

IEEE Annual Conference on Decision and control

作者： Wojciech Paszke Eric Rogers Krzysztof Galkowski Institute of Control and Computation Engineering University of Zielona Gora ul. Podgorna 50 65-246 Zielona Gora Poland School of Electronics and Computer Science University of Southampton Southampton SO17 1BJ UK

ISBN: (纸本)9781467357159

This paper uses the Kalman-Yakubovich-Popov lemma to develop new stability tests for differential linear repetitive processes. The control systems theory for these processes have a number of applications areas and the new results in this paper also extend to the design of control laws. In comparison to currently available alternatives, these new tests offer the potential of reduced conservativeness by allowing the use of a Lyapunov matrix with piecewise constant entries as opposed to current algorithms where the Lyapunov matrix has constant entries. For control law design, linear matrix inequality formulations are developed that also extend to the practically relevant case where frequency attenuation is not enforced over the complete spectrum.

关键词： control law stability study Lemma frequency attenuation Repetitive entry

来源：评论

学校读者我要写书评

暂无评论

Prediction of hard rock TBM penetration rate using least square support vector machine

引用

IFAC Proceedings Volumes 2013年第13期46卷 347-352页

作者： Yang Ge Jingcheng Wang Kang Li Department of Automation Shanghai Jiao Tong University Shanghai and Key Laboratory of System Control and Information Processing Ministry of Education of China Shanghai Jiao Tong University Shanghai 200240 China (Tel: 86-21-34205374 ) School of Electronics Electrical Engineering and Computer Science Queen's University Belfast UK

The prediction of tunnel boring machine (TBM) penetration rate is helpful to plan construction time and to control cost. This paper studies on modeling the penetration rate and the rock mass parameters via least square support vector machine (LS-SVM). These rock properties include uniaxial compressive strength (UCS), Brazilian tensile strength (BTS), peak slope index (PSI), distance between planes of weakness (DPW) and the alpha angle. The correlation between the rock parameters and the measured rate of penetration (ROP) is first investigated via LS-SVM. Then the necessity of normalizing the rock parameters is discussed. Finally, comparisons between the LS-SVM and other methods are presented to demonstrate the applicability of LS-SVM for predicting ROP.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Research on key influence factors of current-transfer process based on paralleled breaking

Research on key influence factors of current-transfer proces...

引用

International Conference on Electric Power Equipment - Switching Technology (ICEPE-ST)

作者： Xiang Zheng Zhihui Huang Enyuan Dong Minfu Liao Zhuo Cheng Shengkai Hou Chenxu Niu Post-doctoral Mobile Research Station of Control Science and Engineering Dalian University of Technology Dalian China School of Electrical Engineering Dalian University of Technology Dalian China Department of Computer Science and Technology Dalian Neusoft Institute of Information Dalian China School of Electronics and Information Engineering Dalian Jiaotong University Dalian China

Current-transfer phase-control breaking is one method of paralleled breaking. This method can make up for shortcoming of sole chamber with high rated current and high rated short-current breaking current at the same time. In addition to breaker stationary open time and computing speed of controller, the key influence factor is that controller needs accurately to compute the current-transfer time and current zero appearing moment. It will influence the best triggering moment determination of breaker driving actuator. This paper constructs its mathematical model of current transfer process. By the theory modeling with Matlab, this paper analyzes the influencing factors to current-transfer time and current zero appearing moment. From simulation procedure and result, dc component of short-circuit current and short-circuit current phase angle of contact separating moment of first open chamber, impedance parameter of paralleled circuit and arc voltage of first open chamber after contact separating both influence the current process and current zero. After breaker structure and chamber parameters are fixed, most important matter is that short-circuit current phase angle of contact separating moment of first open chamber needs to be determined accurately.

关键词： Educational institutions Vacuum technology Cooling Copper Insulation

来源：评论

学校读者我要写书评

暂无评论

Distributed environment representation and object localization system in intelligent space

引用

控制理论与应用（英文版） 2012年第3期10卷 371-379页

作者： Yinghua XUE Guohui TIAN Baoye SONG Taotao ZHANG School of Control Science and Engineering Shandong University Jinan Shandong 250061 China School of Computer and Information Engineering Shandong University of Finance Jinan Shandong 250014 China

A kind of new environment representation and object localization scheme is proposed in the paper aiming to accomplish the task of object operation more efficiently in intelligent space. First, a distributed environment represen- tation method is put forward to reduce storage burden and improve the system＇s stability. The layered topological maps are separately stored in different landmarks attached to the key positions of intelligent space, so that the robot can search the landmarks on which the map information can be read from the QR code, and then the environment map can be built autonomously. Map building is an important prerequisite for object search. An object search scheme based on RFID and vision technology is proposed. The RFID tags are attached to the target objects and reference objects in the indoor environ- ment. A fixed RFID system is built to monitor the rough position （room and local area） of target and a mobile RFID system is constructed to detect the targets which are not in the covering range of the fixed system. The existing area of target is determined by the time sequence of reference tags and target tags, and the accurate position is obtained by onboard vision system at a short distance. The experiments demonstrate that the distributed environment representation proposed in the paper can fully meet the requirements of object localization, and the positioning scheme has high search efficiency, high localization accuracy and precision, and a strong anti-interference ability in the complex indoor environment.

关键词： Intelligent space Distributed map representation Object localization Artificial landmark RFID

来源：评论

学校读者我要写书评

暂无评论

Simulation of parallel redundant WLAN with OPNET

Simulation of parallel redundant WLAN with OPNET

引用

International Conference on Emerging Technologies and Factory Automation (ETFA)

作者： Markus Rentschler Omar A. Mady Marco T. Kassis Hassan H. Halawa Tarek K. Refaat Ramez M. Daoud Hassanein H. Amer Hany M. ElSayed Hirschmann Automation and Control GmbH Baden Germany Electronics Engineering Department American University in Cairo Cairo Egypt School of Electrical Engineering and Computer Science University of Ottawa Ottawa ONT Canada Electronics and Communication Department Cairo University Giza Egypt

Applying multiple redundant and diverse communication channels is an established method to achieve an improved overall communication channel. When applied for packet-based data transmission over channels with strongly nondeterministic behaviour due to environmental influence, such as Wireless Communications, timing performance can be greatly improved by this approach. The central element in such a system is the so called “Combiner” on the receiving side. In this work, a new specific type named “Timing Combiner” is described. The Parallel Redundancy Protocol (PRP) according to IEC 62439-3 realizes such a Timing Combiner on the Ethernet level. In this work, an OPNET simulation model is created and analysed for its performance characteristics. Also a quantitative analysis of the effect of different interference models in an industrial environment is presented.

关键词： Noise Diversity reception Protocols Redundancy Delays Jitter

来源：评论

学校读者我要写书评

暂无评论

A Linear control Approach to Distributed Multi-Agent Formations in d-Dimensional Space

A Linear Control Approach to Distributed Multi-Agent Formati...

引用

IEEE Annual Conference on Decision and control

作者： Zhiyun Lin Zhiyong Chen Minyue Fu State Key laboratory of Industrial Control Technology College of Electrical Engineering Zhejiang University 38 Zheda Road Hangzhou 310027 P.R. China School of Electrical Engineering and Computer Science University of Newcastle Callaghan NSW 2308 Australia

ISBN: (纸本)9781467357159

The paper presents a linear approach for formation control of multiple autonomous agents in d-dimensional space. The generalized notion of graph Laplacian, associated to a graph with possibly negative weights on the edges, is introduced aiming to solve the formation problem of controlling a network of point agents to form a given pattern (including rotation, translation, and scaling). By assuming the number of agents is larger than d + 1, we derive that a linear distributed control law exists for this purpose if and only if certain algebraic conditions hold (or equivalently, the graph is globally rigid). Next, it is shown that the generalized graph Laplacian used to stabilize the formations can be obtained by solving a convex optimization problem. Further results are also provided to reveal the conditions under which the attained formations are congruent to or just translations of the desired one.

关键词： Laplace equations Aerospace electronics Decentralized control Vectors Symmetric matrices Asymptotic stability Stress

来源：评论

学校读者我要写书评

暂无评论

Multi-objective process parameter optimization for energy saving in injection molding process

引用

Journal of Zhejiang University-science A(Applied Physics & Engineering) 2012年第5期13卷 382-394页

作者： Ning-yun LU Gui-xia GONG Yi YANG Jian-hua LU College of Automation Engineering Nanjing University of Aeronautics and Astronautics Nanjing 210016 China Department of Control Engineering and Science Zhejiang University Hangzhou 310027 China School of Computer Science and Engineering Southeast University Nanjing 210096 China

This paper deals with a multi-objective parameter optimization framework for energy saving in injection molding *** combines an experimental design by Taguchi's method,a process analysis by analysis of variance(ANOVA),a process modeling algorithm by artificial neural network(ANN),and a multi-objective parameter optimization algorithm by genetic algorithm(GA)-based lexicographic *** and global Pareto analyses show the trade-off between product quality and energy *** implementation of the proposed framework can reduce the energy consumption significantly in laboratory scale tests,and at the same time,the product quality can meet the pre-determined requirements.

关键词： Injection molding process Energy saving Multi-objective optimization Genetic algorithm Lexicographic method

来源：评论

学校读者我要写书评

暂无评论

On Variation of Infinite Horizon Performance of Model Predictive control with Varying Receding Horizon

引用

IFAC Proceedings Volumes 2013年第20期46卷 701-706页

作者： Xin Cai Shaoyuan Li Ning Li Kang Li Department of Automation Shanghai Jiao Tong University and Key Laboratory of System Control and Information Processing Ministry of Education Shanghai 200240 P. R. China School of Electronics Electrical Engineering and Computer Science The Queen's University Belfast Belfast BT7 1NN UK

This paper investigates variation of infinite horizon (IH) performance of Model Predictive control (MPC) without constraints as the optimization horizon changes. By exploring properties of the Difference Riccati Equations (DRE), an upper bound and a lower bound of the ratio between variation of IH performance of MPC and finite horizon (FH) optimal cost are obtained. The result shows the dynamic behavior of IH performance of closed-loop MPC systems as the optimization horizon varies.

关键词： Model predictive control Infinite horizon performance Finite horizon optimal control Optimization horizon

来源：评论

学校读者我要写书评

暂无评论

state estimation with fading measurements, randomly varying nonlinearities and probabilistic distributed delays

引用

International Journal of Robust and Nonlinear control 2014年第13期25卷

作者： Derui Ding Zidong Wang Bo Shen Hongli Dong School of Information Science and Technology Donghua University Shanghai 200051 China Department of Computer Science Brunel University Uxbridge Middlesex UB8 3PH UK NAAM Research Group Department of Mathematics King Abdulaziz University Jeddah 21589 Saudi Arabia Institute for Automatic Control and Complex Systems University of Duisburg-Essen Duisburg 47057 Germany College of Electrical and Information Engineering Northeast Petroleum University Daqing 163318 China

In this paper, the state estimation problem is investigated for a class of discrete-time stochastic systems in simultaneous presence of three network-induced phenomena, namely, fading measurements, randomly varying nonlinearities and probabilistic distributed delays. The channel fading is characterized by the ℓ th-order Rice fading model whose coefficients are mutually independent random variables with given probability density functions. Two sequences of random variables obeying the Bernoulli distribution are utilized to govern the randomly varying nonlinearities and probabilistic distributed delays. The purpose of the problem addressed is to design an state estimator such that the dynamics of the estimation errors is stochastically stable and the prespecified disturbance rejection attenuation level is guaranteed. Through intensive stochastic analysis, sufficient conditions are established under which the addressed state estimation problem is recast as a convex optimization one that can be solved via the semi-definite program method. Finally, a simulation example is provided to show the usefulness of the proposed state estimation scheme. Copyright © 2014 John Wiley & Sons, Ltd.

关键词： state estimation fading measurements randomly varying nonlinearities probabilistic distributed delays

来源：评论

学校读者我要写书评

暂无评论

PDBSCAN: Parallel DBSCAN for Large-Scale Clustering Applications

引用

Journal of Donghua University(English Edition) 2012年第1期29卷 76-79页

作者：谢永红马延辉周芳刘颖安 School of Computer and Communication Engineering University of Science and Technology Beijing Key Laboratory for Advanced Control of Iron and Steel Process Ministry of Education University of Science and Technology Beijing

Density-based algorithm for discovering clusters in large spatial databases with noise(DBSCAN) is a classic kind of density-based spatial clustering algorithm and is widely applied in several aspects due to good performance in capturing arbitrary shapes and detecting outliers. However, in practice, datasets are always too massive to fit the serial DBSCAN. And a new parallel algorithm-Parallel DBSCAN(PDBSCAN) was proposed to solve the problem which DBSCAN faced. The proposed parallel algorithm bases on MapReduce mechanism. The usage of parallel mechanism in the algorithm focuses on region query and candidate queue processing which needed substantive computation resources. As a result, PDBSCAN is scalable for large-scale dataset clustering and is extremely suitable for applications in E-Commence, especially for recommendation.

关键词： parallel DBSCAN clustering MapReduce large-scale applications

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：