检索结果-内蒙古大学图书馆

9th International Conference on Informatics in control, Automation and robotics, ICINCO 2012

作者： Mzyk, Grzegorz Institute of Computer Engineering Control and Robotics Wroclaw University of Technology Wybrzeze Wyspianskiego 27 50-370 Wroclaw Poland

ISBN: (纸本)9789898565211

In the paper we recover the static characteristic of Wiener-Hammerstein (sandwich) system from inputoutput data. The system is excited and disturbed by random processes with arbitrary distribution. Two kernel-based estimates are proposed and compared. It is shown that they can successfully recover the system characteristic under small amount of a priori information about the static characteristic and the surrounding dynamic blocks. The identified nonlinear function is not parametrized and is not assumed to be invertible, which is common restriction in the literature. The orders of linear dynamic blocks are also unknown. The convergence of the estimates take place for the points in which the input probability density function in positive. The effectiveness of the algorithms is illustrated in simulation example. Copyright © 2012 SciTePress.

关键词： Random processes

来源：评论

学校读者我要写书评

暂无评论

Multi-criteria optimization in control of switched systems

Multi-criteria optimization in control of switched systems

引用

2012 13th International Carpathian control Conference, ICCC 2012

作者： DrĄg, Pawel Zelazny, Dominik Institute of Computer Engineering Control and Robotics Wroclaw University of Technology Janiszewskiego 11/17 50-372 Wroclaw Poland

ISBN: (纸本)9781457718687

In the paper we present a new method for solving optimal control problems of a class of hybrid systems. We describe the new effective algorithm based on memetic algorithm (MA) for optimal control of switched systems. We concentrate on a class of problems in which a pre-specified sequence of active subsystems is known. Our aim is to find both the optimal switching instants and the optimal continuous inputs. The new approach, which we propose, decomposes the cost functional of the basic optimal control problem in Bolza form in two terms. The first term depends explicitly on a value of state variables at the final time. The second term depends on state and control trajectories. In oreder to solve those two tasks we used MA as the multi-objective optimization algorithm. In this paper we considered a fundamental bi-criteria case with two mentioned before functions: the value of state variables at the final time and the state and control trajectories. In order to find an approximation of Pareto frontier, we proposed new effective method based on genetic algorithm (GA) and local search (LS). Problems properties were taken into consideration in the design of our new approach of solving it. They were used to construct new algorithm inspired by the LS NSGA-II, which performed rather well in multi-criteria scheduling problem. Since simple genetic algorithms are efficient heuristics in searching for optimal solutions, but lack the accuracy of some more computational complex algorithms, a hybrid algorithm was constructed. It uses fast non-dominated sorting, in order to evaluate child population and allocate solutions to corresponding Pareto frontiers. I addition a local search method was used, in order to find more differentiated and better solutions. Clustering solutions from Pareto frontiers also improved diversity of solutions in child population. This approach can be used as a start point for searching for algorithm for solving optimal control problems of switched systems wi

关键词： Hybrid systems

来源：评论

学校读者我要写书评

暂无评论

Modeling a spatial communication activity in wireless sensors network

Modeling a spatial communication activity in wireless sensor...

引用

8th International Workshop on Modeling and Applied Simulation, MAS 2009, Held at the International Mediterranean and Latin American Modeling Multiconference, I3M 2009

作者： Nikodem, Jan Klempous, Ryszard Nikodem, Maciej Woda, Marek Chaczko, Zenon Institute of Technical Cybernetics Wroclaw University of Technology Poland Institute of Computer Engineering Automatics and Robotics Wroclaw University of Technology Poland Institute of Computer Science Control and Robotics Faculty of Electronics Wroclaw University of Technology Poland University of Technology Sydney NSW Australia

ISBN: (纸本)9781629934747

This paper presents a novel method of modeling spatial communication activity in wireless sensor network (WSN). We define native aspects of communication in WSN. Focusing on local/global activity dilemma, cooperation, interference, network topology, and optimization aspects. A neighborhood abstraction is defined and we involve three binary relations: subordination, tolerance and collision to describe the cooperation in WSN. Using digital terrain model tools we model communication activity aspects as surfaces, stretched over WSN network. A network topology features are modeled using bare drainage surface. It is a component of a topographic map, which gives a direction towards the base station, determined by a slope of the modeled surface. Modeling node's instant energy level, we construct another surface represents node's instant level of consumed energy. Finally, we construct a drainage surface spread over each node neighborhood as superposition of bare drainage surface, energy consumed and relational surfaces.

关键词： Topology

来源：评论

学校读者我要写书评

暂无评论

Weight update sequence in MLP networks

引用

Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2014年 8669卷 266-274页

作者： Kordos, Miroslaw Rusiecki, Andrzej Kamiński, Tomasz Greń, Krzysztof University of Bielsko-Biala Department of Mathematics and Computer Science Bielsko-Biala Willowa 2 Poland Wroclaw University of Technology Institute of Computer Engineering Control and Robotics Wroclaw Wybrzeże Wyspiańskiego 27 Poland

ISBN: (纸本)9783319108391

The advantages of Variable Step Search algorithm - a simple local search-based method of MLP training is that it does not require differentiable error functions, has better convergence properties than backpropagation and lower memory requirements and computational cost than global optimization and second order methods. However, in some applications, the issue of training time reduction becomes very important. In this paper we evaluate several approaches to achieve this reduction. © Springer International Publishing Switzerland 2014.

关键词： Global optimization

来源：评论

学校读者我要写书评

暂无评论

Jacobian motion planning of nonholonomic robots: The Lagrangian Jacobian algorithm 10

Jacobian motion planning of nonholonomic robots: The Lagrang...

引用

10th International Workshop on Robot Motion and control, RoMoCo 2015

作者： Tchoń, Krzysztof Góral, Ida Ratajczak, Adam Cybernetics and Robotics Electronics Faculty Wroclaw University of Technology Wroclaw50-372 Poland Automation Mechatronics and Control Systems Electronics Faculty Wroclaw University of Technology Wroclaw50-372 Poland

ISBN: (纸本)9781479970438

For nonholonomic robots whose kinematics are described by a driftless control system with outputs a new Jacobian inverse and a Jacobian motion planning algorithm are proposed. This inverse is based on solving a Lagrange-type constrained optimization problem, generalizing the usual Jacobian pseudoinverse. A case study illustrates a potential applicability of the new algorithm to shaping the system's motion. © 2015 IEEE.

关键词： Motion planning

来源：评论

学校读者我要写书评

暂无评论

Recursive estimation of Hammerstein system nonlinearity by Haar wavelets

Recursive estimation of Hammerstein system nonlinearity by H...

引用

作者： Śliwiński, Przemyslaw Hasiewicz, Zygmunt Institute of Computer Engineering Control and Robotics Wroclaw University of Technology Wybrzeze Wyspiańskiego 27 50-370 Wroclaw Poland

ISBN: (纸本)9783902661807

In the note two recursive algorithms recovering the nonlinearity in Hammerstein systems are proposed. The algorithms are based on Haar wavelet orthogonal series kernels and are of the simple generic standard form: μcaron;k (x) = μcaron;k-1 (x) + kk (x) [yk - μcaron;k-1 (x)], where kk (x) is an algorithm-dependent weighting factor. Convergence of both algorithms is examined for continuous and discontinuous nonlinearities and the convergence rates are established. Stability of the algorithms is also shown. Their performances for small numbers of measurements are numerically compared. © 2010 IFAC.

关键词： control nonlinearities

来源：评论

学校读者我要写书评

暂无评论

Impatience mechanism in saddles' crossing 6

Impatience mechanism in saddles' crossing

引用

6th International Conference on Evolutionary Computation Theory and Applications, ECTA 2014, Part of the 6th International Joint Conference on Computational Intelligence, IJCCI 2014

作者： Karcz-Duleba, Iwona Institute of Computer Engineering Control and Robotics Wroclaw University of Technology Wyb. Wyspianskiego 27 Wroclaw50-370 Poland

ISBN: (纸本)9789897580529

Evolutionary inspired heuristics suffer from a premature convergence at local optima and, consequently, a population diversity loss. Thus, breaking out of a local optimum trap and crossing saddles between optima in multimodal and multidimensional search spaces is an important issue in an evolutionary optimization algorithm. In this paper, an impatience mechanism coupled with a phenotypic model of evolution is studied. This mechanism diversifies a population and facilitates escaping from a local optima trap. An impatient population polarizes itself and evolves as a dipole centered around an averaged individual. The operator was modified by supplying it with an extra knowledge about a currently found optimum. In the case, behavior of a population is quite different - a significant diversification is observed but the population is not polarized and evolves as a single cluster. Both mechanisms allow to cross saddle relatively fast for a wide range of parameters of a bimodal multidimensional fitness function.

关键词： Optimization

来源：评论

学校读者我要写书评

暂无评论

Self-adaptation of parameters in a XCS-based ensemble machine

Self-adaptation of parameters in a XCS-based ensemble machin...

引用

8th International Conference on Hybrid Intelligent Systems, HIS 2008

作者： Troc, Maciej Unold, Olgierd Institute of Computer Engineering Control and Robotics Wroclaw University of Technology Wyb. Wyspianskiego 27 50-370 Wroclaw Poland

The self-adaptive model of a XCS-based ensemble machine solving data-mining tasks has been presented. The results of experiments have shown the ability of the architecture to adapt the parameters of single XCS: the mu... 详细信息

ISBN: (纸本)9780769533261

关键词： Data mining

来源：评论

学校读者我要写书评

暂无评论

Modelling of collective animal behavior using relations and set theory

Modelling of collective animal behavior using relations and ...

引用

14th International Conference on Computer Aided Systems Theory, EUROCAST 2013

作者： Nikodem, Jan Institute of Computer Engineering Control and Robotics Wroclaw University of Technology 11-17 Janiszewskiego Street 50-372 Wroclaw Poland

ISBN: (纸本)9783642538551

In this paper we focus on developing the formal methods and techniques necessary to model and classify a collective animal behaviour. The benefits of using set theory are the possibility of a formal examination of the local problems and to organize individuals as elements of the considered classes, defined globally. In order to describe collective activity of animals, we proposed concepts of actions, behaviour and structures. To govern collective behaviour of animals we propose three key relations and mappings determined taxonomic order on them. © 2013 Springer-Verlag Berlin Heidelberg.

关键词： Animals

来源：评论

学校读者我要写书评

暂无评论

Enabling design and development of wireless BANs using 802.15.x standards

Enabling design and development of wireless BANs using 802.1...

引用

14th International Conference on Computer Aided Systems Theory, EUROCAST 2013

作者： Szymanski, Jan Chaczko, Zenon Rodanski, Ben Jablonski, Andrzej Faculty of Engineering and IT University of Technology Sydney Australia Institute of Computer Engineering Control and Robotics Wroclaw University of Technology Poland

ISBN: (纸本)9783642538612

In recent years, the wireless Body Area Network (BAN) technology has made significant advances. There is a tremendous need for the development of this technology. However, wireless BANs require much higher reliability than other similar types of networks as they need to operate at lower levels of user interaction and impose much stricter compliance to various regulatory requirements and technical standards. The aim is to discuss differences and reasoning behind the distinction of the two main types of sensor network tchnologies. The use of new wireless technologies and open standards can greatly extend and improve the functionality of BANs leading to new type of applications. This article, covers a number of issues related to the adaption of the wireless BAN technology in pervasive healthcare. © 2013 Springer-Verlag Berlin Heidelberg.

关键词： Health care

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：