检索结果-内蒙古大学图书馆

2007 AIAA InfoTech at Aerospace Conference

作者： Seybold, Calina Chen, George Bellutta, Paolo Johnson, Andrew Matthies, Larry Thurman, Sam Jet Propulsion Laboratory California Institute of Technology Pasadena CA 91109 United States System Engineering Section M/S 233-201 4800 Oak Grove Drive United States AIAA United States EDL Systems and Advanced Technologies Group System Engineering Section M/S 301-490 Mobility and Robotic Systems Section M/S 198-235 United States Computer Vision Group Mobility and Robotics Systems Section M/S 198-235 United States Autonomous Systems Division M/S 198-105

ISBN: (纸本)1563478935

In April 2006, a terrain-relative navigation experiment successfully flew on a sounding rocket mission at White Sands Missile Range. The mission was designated by NASA/Wallops Flight Facility as 41.068 NT/Seybold ("41.068") and was flown as part of the New Millennium Program ST9 Terrain-Relative Guidance system (TRGS) Project's competitive Phase A effort. The TRN experiment had two objectives: 1) To demonstrate the viability of a navigation filter for precision landing that uses on-board IMU and descent image data to achieve position knowledge errors of less than 100m, validated with GPS data recorded during flight;and 2) To establish that commercial off-the-shelf cameras can be packaged sufficiently well to survive the sounding rocket launch environment. Both objectives were met. The 13 min flight provided a data set that was processed post-flight through the prototype algorithms to bring the ST9 TRGS Project to a technology readiness level of 4 in TRN. This paper describes the flight system development and operations of the TRN experiment on 41.068.

关键词： Flight control systems

来源：评论

学校读者我要写书评

暂无评论

OPTIMAL CONTROL FOR TWO-DIMENSIONAL LINEAR systems WITH VARIABLE COEFFICIENTS

引用

Asian Journal of Control 2008年第4期1卷

作者： Jimshone Li Jason Sheng-Hong Tsai Leang-San Shieh Control System Laboratory Department of Electrical Engineering National Cheng Kung University Tainan 701 Taiwan R.O.C. Jim-Shone Li was born in Taiwan R. O.C. on April 20 1967. He received B.S. and M.S. degrees in Electrical Engineering from the Chung-Cheng Institute of Technology Taoyuan Taiwan R.O.C. in 1989 and 1993 respectively. He is currently a Ph.D. student at National Cheng-Kung University Tainan Taiwan R.O.C. His research interests include analysis and design of multidimensional systems and nonlinear system control. Department of Electrical and Computer Engineering University of Houston Houston TX 77004-4793 U.S.A.

An optimal control method for two-dimensional (2-D) linear systems with variable coefficients and free boundary conditions in Roesser's model is proposed in this paper. Based on Roesser's model, an equivalent general 1-D model of the 2-D system is presented, and the problem of minimizing a 2-D linear quadratic (LQ) cost function is solved for the case where complete state information is available. The solution is obtained by using the proposed dynamic programming in 1-D descriptor form to solve the Riccati equation and then arriving at the optimal control law and minimum cost. The proposed control methodology can be applied to discrete-time models of systems described by partial differential equations and can also be used in the field of signal processing.

关键词： Two-dimensional system optimal control Roesser's model Riccati equation

来源：评论

学校读者我要写书评

暂无评论

A Brief Overview of the Complex Biological and engineering Networks

A Brief Overview of the Complex Biological and Engineering N...

引用

IEEE International Symposium on Circuits and systems (ISCAS)

作者： Jinhu Lu Derong Liu Key Laboratory of Systems and Control Institute of Systems Science Academy of Mathematics and System Science Chinese Academy and Sciences Beijing China Department of Electrical and Computer Engineering University of Illinois Chicago Chicago IL USA

Over the last few decades, complex networks have been intensively studied throughout many fields of science, especially in biological and engineering sciences. This paper briefly reviews the main advances in the complex biological and engineering networks, aiming to bridge the gap between the complex biological and engineering networks. Biologists pay more attention to the mechanisms and local dynamics of individuals, however, engineers are more interesting in the global dynamical behaviors. It is the time for the biologists and engineers to work together for better understanding the complex networks.

关键词： Biological system modeling Complex networks Mathematical model Biology Genetics Power system modeling Bridge circuits Evolution (biology) computer networks Power engineering computing

来源：评论

学校读者我要写书评

暂无评论

A Study On Iterative Learning Control With Adjustment Of Learning Interval For Monotone Convergence In The Sense Of Sup-Norm

引用

Asian Journal of Control 2008年第1期4卷

作者： Kwang-Hyun Park Zeungnam Bien Division of EE Department of EECS Korea Advanced Institute of Science and Technology 373–1 Kusong-dong Yusong-gu Taejon 305–701 Korea. Zeungname Bien:received the B.S. degree in electronics engineering from Seoul National University Seoul Korea in 1969 and the M.S. and Ph.D. degrees in electrical engineering from the University of Iowa Iowa City Iowa U.S.A. in 1972 and 1975 respectively. During 1976–1977 academic years he taught as assistant professor at the Department of Electrical Engineering University of Iowa. Then Dr. Bien joined Korea Advanced Institute of Science and Technology summer 1977 and is now Professor of Control Engineering at the Department of Electrical Engineering and Computer Science KAIST. Dr. Bien was the president of the Korea Fuzzy Logic and Intelligent Systems Society during 1990–1995 and also the general chair of IFSA World Congress 1993 and for FUZZ-IEEE99 respectively. He is currently co-Editor-in-Chief for International Journal of Fuzzy Systems (IJFS) Associate Editor for IEEE Transactions on Fuzzy Systems and a regional editor for the International Journal of Intelligent Automation and Soft Computing. He has been serving as Vice President for IFSA since 1997 and is now Chief Chairman of Institute of Electronics Engineers of Korea and Director of Humanfriendly Welfare Robot System Research Center. His current research interests include intelligent control methods with emphasis on fuzzy logic systems service robotics and rehabilitation engineering and large-scale industrial control systems. Kwang-Hyun Park:received the B.S. M.S. and Ph.D. degrees in electrical engineering and computer science from KAIST Korea in 1994 19997 and 2001 respectively. He is now a researcher at Human-friendly Welfare Robot System Research Center. His research interests include learning control machine learning human-friendly interfaces and service robotics.

It has been found that some huge overshoot in the sense of sup-norm may be observed when typical iterative learning control (ILC) algorithms are applied to LTI systems, even though monotone convergence in the sense of λ-norm is guaranteed. In this paper, a new ILC algorithm with adjustment of learning interval is proposed to resolve such an undesirable phenomenon, and it is shown that the output error can be monotonically converged to zero in the sense of sup-norm when the proposed ILC algorithm is applied. A numerical example is given to show the effectiveness of the proposed algorithm.

关键词： Iterative learning control monotone convergence learning interval sup-norm

来源：评论

学校读者我要写书评

暂无评论

AUTOMATED 3-D QUANTIFICATION OF BRAIN TISSUE AT THE CELLULAR SCALE FROM MULTI-PARAMETER CONFOCAL MICROSCOPY IMAGES

AUTOMATED 3-D QUANTIFICATION OF BRAIN TISSUE AT THE CELLULAR...

引用

IEEE International Symposium on Biomedical Imaging

作者： Gang Lin Yousef Al Kofahi James A. Tyrrell Christopher Bjornsson William Shain Badrinath Roysam Department of Electrical Computer and Systems Engineering Rensselaer Polytechnic Institute Troy NY USA Laboratory of Nervous System Disorders New York State Department of Health Wadsworth Center Albany NY USA

ISBN: (纸本)9781424406715;1424406714

Brain tissue is the most complex tissue in the mammalian anatomy. It is structurally complex, containing diverse cell types and vasculature with complex spatial relationships. It is also complex in terms of molecular constituents, and their relationship to the structural constituents. There is a need for technologies to map normal and injured brain tissue and compute appropriate quantitative measurements in support of a large number of investigations. We present a systematic methodology named FARSIGHT (fluorescence association rules for image-based insight), combining multi-parameter immuno-histochemical labeling, three-dimensional confocal microscopy, linear unmixing, segmentation, and associative morphometry to map and quantify diverse aspects of brain tissue. In addition to morphometric measurements of individual structures from individual imaging channels, we propose the use of distance maps, distance-weighted integrals, and distributions as an efficient basis for computing a versatile set of such associative measurements. These features enable classification of all the major cell types, and computation of their inter-relationships.

关键词： Brain Microscopy Anatomy Appropriate technology Fluorescence Association rules Diversity reception Labeling Image segmentation Distributed computing

来源：评论

学校读者我要写书评

暂无评论

A parallel algorithm for RNA secondary structure prediction

引用

WSEAS Transactions on systems 2007年第2期6卷 328-334页

作者： Che, Yanqiu Tang, Zheng Cao, Qiping Liu, Shaozhi Department of Intellectual Information Systems Engineering Toyama University 3190 Gofuku Toyama 930-8555 Japan Tateyama Institute of System Toyama 930-0004 Japan Hokuriku Computer Service Co. Ltd. Toyama 939-2708 Japan

RNA secondary structure prediction is a broadly studied problem and remains a challenging task in molecular biology. In this paper, we present a new parallel algorithm based on the improved transiently chaotic neural network (TCNN) for predicting RNA secondary structure. It consists of three steps. First, Search and list all possible helices. Second, consider the RNA secondary structure prediction problem as the maximum independent set problem. Third, apply the proposed improved transiently chaotic neural network to solve the problem and achieve the predicted RNA secondary structure. In order to demonstrate the confidence of the proposed algorithm, tests on three RNA sequences: tRNAphe, pre-tRNAtyr and Saccharomyces cerevisiae are performed. The results show that the proposed parallel algorithm is effective and has an accepted accuracy compared with the most-used method.

关键词： Parallel algorithms

来源：评论

学校读者我要写书评

暂无评论

SPECTS O-CDMA field trials using subpicosecond pulses and integrated encoders/decoders across 80.8-km and 150-km links

SPECTS O-CDMA field trials using subpicosecond pulses and in...

引用

International Conference on Photonics in Switching (PS)

作者： N.K. Fontaine C. Yang R.P. Scott V.J. Hernandez F. Soares R. Broeke K. Perry G. Nowak W. Cong K. Okamoto B.H. Kolner Z. Ding J.P. Heritage S.J.B. Yoo Department of Electrical and Computer Engineering University of California Davis CA USA Department of Applied Science University of California Davis CA USA Key Laboratory for Micro/Nano Technology and System of Liao-ning ProvinceAerospace Systems Design Laboratory Massachusetts Institute of Technology Lexington MA USA

We compare two field demonstrations of SPECTS-OCDMA on an 80.8-km link and 150-km link using integrated, polarization independent arrayed-waveguide grating (AWG)-based encoders/decoders, an ultra-stable optical freque... 详细信息

关键词： Decoding Fiber nonlinear optics Nonlinear optics Optical receivers Frequency Optical pulses Optical pulse shaping Optical modulation Laboratories Polarization mode dispersion

来源：评论

学校读者我要写书评

暂无评论

Quantitative Emergence

Quantitative Emergence

引用

IEEE Mountain Workshop on Adaptive and Learning systems

作者： M. Mnif C. Muller-Schloer System and Computer Architecture Institute of Systems and Computer Engineering Hanover Germany

ISBN: (纸本)1424401666

Emergence can be defined as the formation of order from disorder based on self-organization. Humans -by looking at a self-organizing system - can decide intuitively whether emergence was taking place or not. To build self-organizing technical systems we need to automate the recognition of emergent behavior. In this paper we try to give a quantitative and practically usable definition of emergence. The presented theoretical approach is applied to an experimental environment, which shows emergent behavior. An observer/controller architecture with emergence-detectors is introduced. The proposed definition of emergence is discussed in comparison with Shannon's information theoretical approach

关键词： Entropy Humans computer architecture systems engineering and theory Electronic mail Automatic control Computational modeling computer simulation Internet Books

来源：评论

学校读者我要写书评

暂无评论

Image and Signal Processing for Networked eHealth Applications

引用

2006年

作者： Ilias G. Maglogiannis Kostas Karpouzis Manolis Wallace

ISBN: (数字)9781598290370

E-health is closely related with networks and telecommunications when dealing with applications of collecting or transferring medical data from distant locations for performing remote medical collaborations and diagnosis. In this book we provide an overview of the fields of image and signal processing for networked and distributed e-health applications and their supporting technologies. The book is structured in 10 chapters, starting the discussion from the lower end, that of acquisition and processing of biosignals and medical images and ending in complex virtual reality systems and techniques providing more intuitive interaction in a networked medical environment. The book also discusses networked clinical decision support systems and corresponding medical standards, WWW-based applications, medical collaborative platforms, wireless networking, and the concepts of ambient intelligence and pervasive computing in electronic healthcare systems.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Improving address space randomization with a dynamic offset randomization technique 06

Improving address space randomization with a dynamic offset ...

引用

2006 ACM Symposium on Applied Computing

作者： Xu, Haizhi Chapin, Steve J. System Assurance Institute Syracuse University Syracuse NY 13244 United States Systems Assurance Institute Department of Electrical Engineering and Computer Science Syracuse University Syracuse NY 13244 United States

ISBN: (纸本)1595931082

Address Space Randomization (ASR) techniques randomize process layout to prevent attackers from locating target functions. Prior ASR techniques have considered singletarget attacks, which succeed if the attacker can locate a single, powerful system library function. These techniques are not sufficient to defend against chained return-into-lib(c) attacks, each of which calls a sequence of system library functions in order. In this paper, we propose a new ASR technique, code islands, that randomizes not only the base pointers of memory mapping (mmapping), but also relative distances between functions, maximally and dynamically. Our technique can minimize the utility of information gained in early probes of a chained return-into-lib(c) attack, for later stages of that attack. With a pre-defined rerandomization threshold, our code islands technique not only is exponentially more effective than any prior ASR technique in defending against brute-force searches for locations of multiple targets-a key component of chained return-into-lib(c) attacks, but can also maintain high service availability even under attack. Our overhead measurement on some wellknown GNU applications shows that it takes less than 0.05 second to load/rerandomize a process with the necessary C system library functions using code islands, and our technique introduces a 3-10% run-time overhead from interisland control transfers. We conclude that the code island technique is well-suited to dedicated multi-threaded servers. Copyright 2006 ACM.

关键词： Random processes

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：