检索结果-内蒙古大学图书馆

IEEE International Conference on computer-Aided Design

作者： Farzad Hashemzadeh Babak N. Araabi Caro Lucas Control & Intelligent Processing Center of Excellence School of Electrical and Computer Engineering University of Tehran Tehran Iran

This paper presents a new approach to gating in target tracking. Here, the gate is defined as the region in which the tracked target is expected to exist. The observation vector in the gate is used for tracking. In tracking in a two-dimensional plane, various shapes can be conceived as a gate, including a rectangle, circle, and ellipse. Elliptical gate is optimal for linear Gaussian modeled systems and suboptimal for non-Gaussian systems. This paper introduces mixture weighted gating by generalizing Kalman filter to non-Gaussian linear systems. This non-elliptical gate is applied in target tracking and its advantage respect to elliptical gate is shown

关键词： Target tracking Radar tracking Bayesian methods Vectors Shape Azimuth Intelligent control Ellipsoids Personal digital assistants Clutter

来源：评论

学校读者我要写书评

暂无评论

单壁碳纳米管微分电导在高压和强磁场下的实验研究

引用

物理学报 2006年第12期55卷 6585-6588页

作者：蔡建臻朱宏伟吴德海刘峰吕力中国科学院物理研究所 Department of Electrical and Computer Engineering and Center for Computation and Technology Louisiana State University Baton Rouge 70803 USA 清华大学机械工程系 Department of Materials Science and Engineering University of Utah Salt Lake City 84112 USA

单壁碳纳米管在高压下会发生结构相变,导致金属型的碳纳米管变成半导体.相变后碳纳米管中电子的库仑关联的表现形式发生变化,从Luttingerliquid行为转变成环境量子涨落行为.同时,相变后电子波函数的相位关联导致弱局域化行为的出现.为... 详细信息

单壁碳纳米管在高压下会发生结构相变,导致金属型的碳纳米管变成半导体.相变后碳纳米管中电子的库仑关联的表现形式发生变化,从Luttingerliquid行为转变成环境量子涨落行为.同时,相变后电子波函数的相位关联导致弱局域化行为的出现.为了研究库仑关联和相位关联之间是否有相互影响,使用金刚石对顶砧和液压自锁高压包在0—10GPa准静压范围内测量了单层碳纳米管样品在低温和不同磁场下的微分电导随偏压的依赖关系.实验结果表明,相位关联和库仑关联是两种独立的效应,各自影响着电子的输运行为.

关键词：单层碳纳米管高压微分电导

来源：评论

学校读者我要写书评

暂无评论

FuFaIR: a Fuzzy Farsi Information Retrieval System

FuFaIR: a Fuzzy Farsi Information Retrieval System

引用

ACS/IEEE International Conference on computer Systems and Applications

作者： A. Nayyeri F. Oroumchian Department of Electrical & Computer Engineering University of Tehran Iran Control and Intelligent Processing Center of Excellence Faculty of Engineering University of Tehran Iran

来源：评论

学校读者我要写书评

暂无评论

A control-design-based solution to robotic ecology: Autonomy of achieving cooperative behavior from a high-level astronaut command

A control-design-based solution to robotic ecology: Autonomy...

引用

作者： Wang, Jing Qu, Zhihua Ihlefeld, Curtis M. Hull, Richard A. Department of Electrical and Computer Engineering University of Central Florida Orlando FL 32816 United States Kennedy Space Center FL 32899 United States Lockheed Martin Missiles and Fire Control 5600 Sand Lake Rd. MP-450 Orlando FL 32819 United States School of Electrical and Computer Science University of Central Florida IEEE AIAA University of Central Florida Department of Electrical and Computer Engineering National Aeronautics and Space Administration Kennedy Space CenterKennedy Space Center Applied Physics Lab. Advanced Concepts Business Unit Science Applications International Corporation SAIC IEEE Control System Society

In this paper, we propose a cooperative control strategy for a group of robotic vehicles to achieve the specified task issued from a high-level astronaut command. The problem is mathematically formulated as designing the cooperative control for a general class of multiple-input-multiple-output (MIMO) dynamical systems in canonical form with arbitrary but finite relative degrees such that the outputs of the overall system converge to the explicitly given steady state. The proposed cooperative control for individual vehicle only need to use the sensed and communicated outputs information from its local neighboring vehicles. No fixed leader and time-invariant communication networks are assumed among vehicles. Particularly, a set of less-restrictive conditions on the connectivity of the sensor/communication networks are established, under which it is rigorously proven by using the newly found nice properties of the convergence of sequences of row stochastic matrices that the cooperative objective of the overall system can be achieved. Simulation results for a group of vehicles achieving a target and surrounding a specified object in formation are provided to support the proposed approach in this paper.

关键词： Robotics

来源：评论

学校读者我要写书评

暂无评论

Piecewise Linear Model Tree: A modified combination of two learning algorithms for neuro-fuzzy models

Piecewise Linear Model Tree: A modified combination of two l...

引用

IEEE International Conference on computer-Aided Design

作者： Atiye Sarabi Jamab Babak N. Araabi Electrical Engineering Department Malek Ashtar University of Technology Tehran Iran Control & Intelligent Processing Center of Excellence Electrical and Computer Engineering Department University of Tehran Tehran Iran

Locally Linear Model Tree (LOLIMOT) and Piecewise Linear Network (PLN) learning algorithms are two approaches in local linear modeling use different algorithm in each part of training phase. PLN learning is more depended on training data than LOIMOT and needs rich training data set. In PLN learning no division test is needed and it causes this algorithm to be much faster than LOLIMOT, but it may create adjacent neurons that would lead to singularity in regression matrix. In LOLIMOT, because of regular splitting of input space, this problem does not occur and always it leads to acceptable output error, but needs large number of neuron. Therefore, PILIMOT learning algorithm is introduced as modified combination of these two main Locally Linear approaches. This new method takes suitable error and neuron number from both of algorithms and leads to efficient network which is applicable to identify all functions. Simulation results show the advantage and behavior of new method.

关键词： Piecewise linear techniques Function approximation Neurons Partitioning algorithms Neural networks Approximation algorithms Piecewise linear approximation Radial basis function networks Training data Artificial neural networks

来源：评论

学校读者我要写书评

暂无评论

Design and simulation of an adaptive load shedding algorithm using a real network

Design and simulation of an adaptive load shedding algorithm...

引用

IEEE Power India Conference

作者： H. Seyedi M. Sanaye-Pasand M.R. Dadashzadeh School of Electrical and Computer Engineering University of Tehran Iran Control and Intelligent Processing Center of Excellence University of Tehran Iran Department of Electrical Engineering University of Western Ontario Canada

ISBN: (纸本)0780395255

In this paper a new adaptive under frequency load shedding algorithm is designed. The purpose of this method is to enhance the adaptability of under frequency relays and increase the security of power system during large disturbances. A suitable method to design the proposed adaptive under frequency load shedding scheme is described in detail. After completing the design, it is tested on a real power system by modeling the network in a power system studies software. Simulation results indicate that the proposed method has an improved performance for large disturbances while its response is similar to the conventional scheme for small disturbances

关键词： Algorithm design and analysis Power system simulation Power system relaying Power system security Power system modeling Frequency Design methodology Software testing System testing Software systems

来源：评论

学校读者我要写书评

暂无评论

On stability of switched linear systems with perturbed switching paths

引用

控制理论与应用（英文版） 2006年第1期4卷 18-25页

作者： Zhendong SUN Shuzhi S. GE Center for Control and Optimization South China University of Technology Guangzhou Guangdong 510641 China Department of Electrical and Computer Engineering National University of Singapore 117576 Singapore

This paper addresses the stability issue of switched linear systems with perturbed switching paths. First, by introducing the notions of child-path and parent-path, we are able to define the distance between two switching paths by means of their switching matrices chains. Next, we present the nice properties of the defined distance. Then, a stability criterion is presented for a class of switched linear systems with perturbed switching paths. Finally, an illustrative example is presented to verify the effectiveness of the approach.

关键词： Switched systems Switching path Consistent convergency Switching distance

来源：评论

学校读者我要写书评

暂无评论

Out of step relaying using phasor measurement unit and equal area criterion

Out of step relaying using phasor measurement unit and equal...

引用

IEEE Power India Conference

作者： M.C. Bozchalui M. Sanaye-Pasand School of Electrical and Computer Engineering University of Tehran Iran Control and Intelligent Processing Center of Excellence University of Tehran Iran

Significant changes of load as well as faults and their clearance in power systems, which disturb balance of energy in the system, often result in electromechanical oscillations. This causes variation in power flow between two areas which is usually called as power swing. An effective way to retaliate such a disturbance is through controlled islanding of the power system using out of step (OOS) protection systems. In this paper we use a method which is based on the well-known equal area criterion (EAC) and application of phasor measurement units to protect interconnected systems against loss of synchronism. System oscillation is modeled using the mth-order auto regressive model. Afterwards, using the phase difference values stability of the power system is determined using the equal area criterion

关键词： Relays Phasor measurement units Power system protection Power system modeling Power system measurements Power system relaying Power system faults Power system interconnection Power system stability Load flow

来源：评论

学校读者我要写书评

暂无评论

Quantum key distribution based on a Sagnac loop interferometer and polarization-insensitive phase modulators

Quantum key distribution based on a Sagnac loop interferomet...

引用

IEEE International Symposium on Information Theory

作者： Bing Qi Lei-lei Huang Hoi-kwong Lo Li Qian Center for Quantum Information and Quantum Control Department of Physics and Department of Electrical and Computer Engineering University of Toronto Toronto Canada

We present a design for a quantum key distribution (QKD) system in a Sagnac loop configuration, employing a novel phase modulation scheme based on frequency shift, and demonstrate stable BB84 QKD operation with high interference visibility and low quantum bit error rate (QBER). The phase modulation is achieved by sending two light pulses with a fixed time delay (or a fixed optical path delay) through a frequency shift element and by modulating the amount of frequency shift. The relative phase between two light pulses upon leaving the frequency-shift element is determined by both the time delay (or the optical path delay) and the frequency shift, and can therefore be controlled by varying the amount of frequency shift. To demonstrate its operation, we used an acousto-optic modulator (AOM) as the frequency-shift element, and vary the driving frequency of the AOM to encode phase information. The interference visibility for a 40 km and a 10 km fiber loop is 96% and 99%, respectively, at single photon level. We ran BB84 protocol in a 40-km Sagnac loop setup continuously for one hour and the measured QBER remained within the 2%-5% range. A further advantage of our scheme is that both phase and amplitude modulation can be achieved simultaneously by frequency and amplitude modulation of the AOM's driving signal, allowing our QKD system the capability of implementing other protocols, such as the decoy-state QKD and the continuous-variable QKD. We also briefly discuss a new type of Eavesdropping strategy ("phase-remapping" attack) in bidirectional QKD system

关键词： Sagnac interferometers Polarization Phase modulation Frequency Delay effects Optical modulation Interference Optical pulses Pulse modulation Optical interferometry

来源：评论

学校读者我要写书评

暂无评论

Sagnac quantum key distribution using novel polarization-insensitive phase modulators based on frequency shift

Sagnac quantum key distribution using novel polarization-ins...

引用

LEOS Summer Topical Meetings

作者： Lei-Lei Huang Bing Qi R. Mong Li Qian Hoi-Kwong Lo Department of Electrical and Computer Engineering and Department of Physics Center for Quantum Information and Quantum Control University of Toronto Toronto Canada

We demonstrate a stable Sagnac quantum key distribution implementing BB84 phase-encoding protocol based on acousto-optic frequency shifters. The quantum bit error rate remains 4-6.5% for at least one hour without reca... 详细信息

关键词： Sagnac interferometers Phase modulation Frequency shift keying Pulse modulation Optical pulse generation Optical fiber polarization Quantum computing Protocols Interference Optical control

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：