检索结果-内蒙古大学图书馆

IEEE International Conference on Automation science and engineering (CASE)

作者： Jiliang Luo Qi Zhao Yi-Sheng Huang Mengchu Zhou Department of Control Science and Engineering Huaqiao University Xiamen China Department of Electrical Engineering National Ilan University Ilan Taiwan USA The Department of Electrical and Computer Engineering New Jersey Institute of Technology Newark NJ

Given partially-controllable and partially-observable discrete-event systems, an approach is proposed to model their control system and to design a controller. Via the Petri-net tool, two state-space models are obtained for them based on state-feedback and event-feedback, respectively. According to the former, the maximally-permissive controller is designed when a plant to be controlled is observable and partially-controllable. According to the latter, the maximally-permissive controller is designed when a plant is partially observable. An example is used to illustrate the theoretic results.

关键词： control systems Petri nets Law Imaging Discrete-event systems Transforms

来源：评论

学校读者我要写书评

暂无评论

The collection and analysis of public data 13

The collection and analysis of public data

引用

2014 13th and 8th Joint Networking in Education and Research Conference, RoEduNet/RENAM 2014

作者： Costin-Gabriel, Chiru Ciprian, Mihaila Constantin Computer Science Department Faculty of Automatic Control and Computers Politehnica University of Bucharest Bucharest Romania

ISBN: (纸本)9781479968602

Public data can be considered large and important sources of data that can be used for different purposes. In this paper we present a method for collecting and analyzing data within urban settlements. For more focused analysis and gathering of large amount of data we considered a case study of Bucharest. The main purpose of this analysis is to pick up important information about different streets, points of interests, details about urban planning, etc., with the goal of facilitating a quick and correct evaluation of specific areas and identifying suitable location for adding new points of interest. The prediction of suitable location involves using heuristics and data mining technics such as clustering algorithms, association rules. © 2014 IEEE.

关键词： Urban planning

来源：评论

学校读者我要写书评

暂无评论

Sufficient Conditions for Dynamic Stabilization of 3-State Moore-Greitzer Compressor Model

Sufficient Conditions for Dynamic Stabilization of 3-State M...

引用

IEEE Annual Conference on Decision and control

作者： A.S. Shiriaev L.B. Freidovich A. Robertsson A. Andersson R. Johansson Department of Engineering Cybernetics Norwegian University of Science & Technology NO-7491 Trondheim Norway Robotics & Control Lab the Department of Applied Physics & Electronics Umea University SE-901 87 Umea Sweden Department of Automatic Control Lund University Lund SE-221 00 Sweden

ISBN: (纸本)9781479978878

We consider the classical 3-state Moore-Greitzer model, which is commonly used for approximating dynamics of deviations of flow and pressure variables in an axial compressor from their nominal steady-state values. The linearization of the nonlinear system is not controllable and, therefore, even local asymptotic stability cannot be achieved using methods of linear control theory. We propose a family of parametrized partial-state feedback control laws and derive sufficient conditions to guarantee global asymptotic stability of the closed-loop system. The stability analysis uses the integral quadratic constraints technique for the case of non-strict frequency condition and novel arguments for characterization of ω-limit sets.

关键词： Closed loop systems Surges Asymptotic stability Adaptive control Differential equations Mathematical model Limit-cycles

来源：评论

学校读者我要写书评

暂无评论

control configuration selection for integrating processes using graphs

Control configuration selection for integrating processes us...

引用

IEEE Conference on control Technology and Applications (CCTA)

作者： Miguel Castaño Arranz Wolfgang Birk Petter Asplund Department of Computer science Electrical and Space Engineering Luleå University of Technology Luleå Sweden Signal Processing Group Control Engineering Group Optimation AB Luleå Sweden

Recently, methods for control Configuration Selection (CCS) using weighted graphs have been introduced. These methods were integrated in a software tool which allows systematic CCS in industry processes by choosing a simplified model with a reduced structure on which control will be based. This paper addresses the extension of these graph-based methods to be applied to integrating systems, which often appear in industry processes, e.g. at storage vessels. The extension is based on restricting the analysis to a set of frequencies of interest which omits the infinite DC-gain. The results are validated and illustrated using a real-life case, namely the secondary heating system of a pulp & paper mill.

关键词： Field effect transistors Heating Process control Actuators Valves Systematics

来源：评论

学校读者我要写书评

暂无评论

Methodologies and intelligent systems for technology enhanced learning

引用

Advances in Intelligent Systems and Computing 2015年 374卷

作者： Di Mascio, Tania Gennari, Rosella Vittorini, Pierpaolo De La Prieta, Fernando Department of Information Engineering Computer Science and Mathematics University of L’Aquila L’Aquila Italy Free University of Bozen-Bolzano Bolzano Italy Department of Life Health and Environmental Sciences University of L’Aquila Coppito Italy Department of Computer Science and Automation Control University of Salamanca Salamanca Spain

来源：评论

学校读者我要写书评

暂无评论

Overlapped Cells Separation Algorithm Based on Morphological System Using Distance Minimums in Microscopic Images

Overlapped Cells Separation Algorithm Based on Morphological...

引用

Iranian Conference on Biomedical engineering

作者： Vahid Khodadadi Emad Fatemizadeh S. Kamaledin Setarehdan Department of biomedical Engineering Science and Research Branch Islamic Azad University Electrical engineering department Sharif University of Technology Control and Intelligent Processing Center of Excellence School of Electrical and Computer Engineering Faculty of Engineering University of Tehran

ISBN: (纸本)9781467393522

It is important to distinguish overlapped cell for tracking and segmentation biological cells from images. In this research, a novel or comprehensive method is provided with morphological features of cell and minimum distance for overlapped cells separation (OCS). it's necessary to say that this algorithm is not based on type and number of Overlapped cells. In this presented method based on a distance chart. At first, every cell or rectangle of cell is separated of the original image. Also, multiplex cell is distinguished by using minimum perimeter polygon (MPP) method. Distance chart is achieved on the base of morphological procedure and Computing of cell boundary distance to Cell middle axis in different epochs. By achieving the absolute minimum distance chart, candidate cutting points is detected and separated. Experimental results show the offered method is very effective and the work shows great assistance for the cell Cytoplasm segmentation. At the end, recognition accuracy and 97.4% separation for cells is achieved by this method.

关键词： Overlapped cells Extremum Perpendicular lines Skeleton Concavity areas

来源：评论

学校读者我要写书评

暂无评论

Optimized Kalman Filter Based on Second Momentum and Triple Rectangular for Cell Tracking on Sequential Microscopic Images

Optimized Kalman Filter Based on Second Momentum and Triple ...

引用

Iranian Conference on Biomedical engineering

ISBN: (纸本)9781467393522

Cell dynamics and motion stages are very important issues in the biological cell investigation. in this novel method, we propose a novel method based on Kalman filter and second momentum for tracking cells on Sequential Microscopic Images. In proposed manner at first, we select a cell and cut covering rectangle. in the next step, we predict rectangle center of the cell in Next frame based on a modeling of velocity-acceleration using Kalman filter. The rectangle with triple covering area of previous cell rectangle and predicting center by Kalman filter is considered as a searching area. So, if all objects in the search areas have second momentum error less than threshold, it is selected as a chosen cell and we continue this process till all cells are track. OKF (optimized Kalman filter) algorithm uses second momentum for detecting cells because;value of second momentum doesn't change with rotating cells or changing size. OKF method removes cell after tracking in every frame. So, tracking has an acceptable and excellent precision for tracking in another cell. Also, the algorithm finds cells between frames by changing the reference frame and removing were tracked cells. Performance results of OKF show the proposed method is very admissible, effective method and the work shows great assistance for the cell Cytoplasm tracking. Finally, cells tracking with 98.17% accuracy were achieved by using OKF algorithm.

关键词： Kalman filter Second Momentum Cell Tracking Triple Rectangular OKF Method

来源：评论

学校读者我要写书评

暂无评论

RETRACTED ARTICLE: Potential of support vector regression for solar radiation prediction in Nigeria

引用

Natural Hazards 2015年第2期77卷 1055-1068页

作者： Olatomiwa, Lanre Mekhilef, Saad Shamshirband, Shahaboddin Petkovic, Dalibor Power Electronics and Renewable Energy Research Laboratory (PEARL) Department of Electrical Engineering Faculty of Engineering University of Malaya Kuala Lumpur Malaysia Department of Electrical and Electronic Engineering Federal University of Technology Minna Nigeria Department of Computer System and Technology Faculty of Computer Science and Information Technology University of Malaya Kuala Lumpur Malaysia Department for Mechatronics and Control Faculty of Mechanical Engineering University of Niš Nis Serbia

In this paper, the accuracy of soft computing technique in solar radiation prediction based on series of measured meteorological data (monthly mean sunshine duration, monthly mean maximum and minimum temperature) taking from Iseyin meteorological station in Nigeria was examined. The process, which simulates the solar radiation with support vector regression (SVR), was constructed. The inputs were monthly mean maximum temperature (Tmax), monthly mean minimum temperature (Tmin) and monthly mean sunshine duration ( $$ \bar{n} $$ ). Polynomial and radial basis functions (RBF) are applied as the SVR kernel function to estimate solar radiation. According to the results, a greater improvement in estimation accuracy can be achieved through the SVR with polynomial basis function compared to RBF. The SVR coefficient of determination R 2 with the polynomial function was 0.7395 and with the radial basis function, the R 2 was 0.5877.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Modification of Electric Drive Vehicles Performances Using a Direct Torque control with Over-Modulation Ability

Modification of Electric Drive Vehicles Performances Using a...

引用

Annual Conference of the IEEE Industrial Electronics Society

作者： Ahmad Ghaderi Javad Soltani Mohammad Ebrahimi Amir Ali Forough Nassiraei Research & Development Department Automotive Motor and Electronic Control Group Department of Electrical & Computer Engineering Isfahan University of Technology Graduate School of Life Science and Systems Engineering Kyushu Institute of Technology

ISBN: (纸本)9781479917631

In electric and hybrid-electric vehicles, the inverter output voltage is limited by available DC-link voltage, which restricts the vehicle speed and acceleration. Therefore the fundamental component of the motor voltage should be increased by operating inverter in the six-step mode at high speeds. Although hysteresis based direct torque control (DTC) is a straightforward approach and has several advantages, this method cannot work in the six-step mode. In this paper a new hysteresis based DTC with over modulation ability for interior permanent magnet synchronous machines (IPMSM) is suggested. In this method, unlike the previously proposed methods, the calculation of the voltage vector or flux reference in different phase angles is not necessary. In the proposed method, the flux trajectory is changed by adjusting the non-switching area and modifying switching table, and thus a seamless transformation between high-frequency switching and six-step square wave is possible. Also in this paper, the dynamic model for an electric vehicle is developed which its traction motor is controlled by proposed DTC. The simulation results prove that the proposed method modify the vehicle performances, notably. These results show that the vehicle with proposed method has a higher top speed and better acceleration. Also it is shown, that the proposed method can improve the vehicle efficiency for various driving cycles. In addition the results confirm the torque discontinuity does not appear in the whole range of vehicle speed.

关键词： Over-modulation Direct torque control Seamless Vehicle Electric vehicles Hybrid vehicles IPMSM Motor Six-step operation direct torque control overmodulation Hybrid electric vehicles Electric vehicles vehicle Vehicle speed Motor voltage vector SEAMLESS Vehicle performance

来源：评论

学校读者我要写书评

暂无评论

Bilinear differential forms and the loewner framework for rational interpolation

Lecture Notes in Control and Information Sciences

引用

Lecture Notes in control and Information sciences 2015年 462卷 23-43页

作者： Rapisarda, P. Antoulas, A.C. Learning and Control Group School of Electronics and Computer Science University of Southampton SouthamptonSO17 1BJ United Kingdom Department of Electrical and Computer Engineering Rice University HoustonTX77005 United States School of Engineering and Science Jacobs University Bremen Bremen Germany

The Loewner approach, based on the factorization of a special-structure matrix derived from data generated by a dynamical system, has been applied successfully to realization theory, generalized interpolation, and model reduction. We examine some connections between such approach and that based on bilinear- and quadratic differential forms arising in the behavioral framework. © Springer International Publishing Switzerland 2015.

关键词： Dynamical systems

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：