检索结果-内蒙古大学图书馆

IEEE Pacific Rim Conference on Communications, Computers and Signal Processing

作者： S. Kai K. Katagishi K. Toraichi Y. Mitamura H. Murakami A. Koike T. Asami Doctoral Program Graduate School of Systems and Information Engineering University of Tsukuba Tsukuba Ibaraki Japan Institute of Informalion Sciences and Electronics University of Tsukuba Tsukuba Ibaraki Japan Graduate School of Engineering Hokkaido University Sapporo Japan KDDI Corporation Tokyo Japan KDD Research and Development Laboratories Inc. Kamifukuoka Saitama Japan

To match the different resolution capabilities of devices used in the telemedicine network, we must perform resolution conversion for fundus photograph to the required resolution with the information important to ophthalmologists' diagnosing well preserved. In this paper, in order to keep important information, such as color and shapes of blood vessels, optic disk and lesion areas on the fundus photograph after resolution conversion, we adopt three kinds of fluency functions to approximate shapes and propose a shape-directed resolution conversion method by using two variables compactly supported fluency sampling functions. The method leads the fundus photograph resolution conversion with features of scalability and good information preservation.

关键词： Sampling methods Interpolation Shape control Blood vessels Lesions Medical diagnostic imaging Biomedical optical imaging Photography Diseases Telemedicine

来源：评论

学校读者我要写书评

暂无评论

A Bayesian Approach to Estimating Coupling Between Neural Components: Evaluation of the Multiple Component, Event‐Related Potential (mcERP) Algorithm

引用

AIP Conference Proceedings 2003年第1期659卷 23-38页

作者： Ankoor S. Shah Kevin H. Knuth Wilson A. Truccolo Mingzhou Ding Steven L. Bressler Charles E. Schroeder 1Department of Neuroscience Albert Einstein College of Medicine Bronx NY 10461 2Cognitive Neuroscience and Schizophrenia Program Nathan Kline Institute Orangeburg NY 10962 3NASA Ames Research Center Computational Sciences Department Code IC Moffett Field CA 94035 4Neuroscience Department Brown University Providence RI 94035 5Center for Complex Systems Florida Atlantic University Boca Raton FL 33431

Accurate measurement of single‐trial responses is key to a definitive use of complex electromagnetic and hemodynamic measurements in the investigation of brain dynamics. We developed the multiple component, Event‐Related Potential (mcERP) approach to single‐trial response estimation to improve our resolution of dynamic interactions between neuronal ensembles located in different layers within a cortical region and/or in different cortical regions. The mcERP model asserts that multiple components defined as stereotypic waveforms comprise the stimulus‐evoked response and that these components may vary in amplitude and latency from trial to trial. Maximum a posteriori (MAP) solutions for the model are obtained by iterating a set of equations derived from the posterior probability. Our first goal was to use the mcERP algorithm to analyze interactions (specifically latency and amplitude correlation) between responses in different layers within a cortical region. Thus, we evaluated the model by applying the algorithm to synthetic data containing two correlated local components and one independent far‐field component. Three cases were considered: the local components were correlated by an interaction in their single‐trial amplitudes, by an interaction in their single‐trial latencies, or by an interaction in both amplitude and latency. We then analyzed the accuracy with which the algorithm estimated the component waveshapes and the single‐trial parameters as a function of these relationships. Extensions of these analyses to real data are discussed as well as ongoing work to incorporate more detailed prior information.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Development of Collaborative engineering Environments for Spacecraft Design

引用

AIP Conference Proceedings 2003年第1期654卷 907-916页

作者： Robert C. Singleterry, Jr Bradley D. Johns Kwok Y. Fan F. McNeil Cheatwood Garry D. Qualls Todd A. Wareing John McGhee Shawn Pautz Anil K. Prinja Frederick Gleicher Greg Failla Jaroslaw Sobieszczanski‐Sobieski John W. Wilson 1Structures and Materials Competency NASA Langley Research Center Hampton VA 23681 2Swales Aerospace NASA Langley Research Center Hampton VA 23681 3Space Access & Exploration Program Office NASA Langley Research Center Hampton VA 23681 4Systems Engineering Competency NASA Langley Research Center Hampton VA 23681 5Transport Methods Group CCS‐4 Los Alamos National Laboratory Los Alamos NM 87545 6University of New Mexico Chemical and Nuclear Engineering Albuquerque NM 87131 7ICEM CFD Engineering Berkeley CA 94705

The hazards of ionizing radiation in space continue to be a limiting factor in the design of missions, spacecraft, and habitats. Shielding against such hazards is an enabling technology in the human and robotic exploration and development of space. If the design of the radiation shielding is not optimal for the mission, then excess mass will be launched, mission costs will be higher than necessary, and useful payload will be reduced. This reduced mission capability scenario can be repeated for other technical design disciplines. These other disciplines can also effect each other’s requirements. A collaborative engineering environment can optimize ALL design parameters for cost (or another parameter) producing a spacecraft that will meet all mission requirements at the minimum cost. This paper describes two environments that include space radiation analyses and the inclusion within a larger optimization methodology.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Human systems integration and advanced technology in engineering department workload and manpower reduction

引用

NAVAL ENGINEERS JOURNAL 2003年第1期115卷 57-65页

作者： Lively, KA Seman, AJ Kirkpatrick, M KENNETH A. LIVELY graduated from the University of Colorado with a BS in applied mathematics and an MS in mathematics in 1976 and from the Massachusetts Institute of Technology with an MS in electrical engineering and the degree ocean engineer in naval architecture and marine engineering in 1984. He retired from the U.S. Navy in 1989 after 23 years of service. Assignments included electrical officer on the USS Constellation (CV 64) project engineer for the DDG 51 machinery control system (NAVSEA) and DDG 51 Technical Director (NAVSEA). He was vice president of the PDI Division of Bird-Johnson Company from July 1989 to November 1998 where he managed various gas turbine and machinery controls related development projects. He joined Anteon Corporation's Systems Engineering Group as senior controls engineer in December 1998 where he provided technical support to the integrated power systems program (NAVSEA PMS 510) and managed the Office of Naval Research Afloat Laboratory. DR. MARK KIRKPATRICK is currently an independent consultant in human factors and work-load/manning analysis and modeling. He holds a Ph.D. degree in experimental psychology from The Ohio State University and has 34 years of experience in applied human factors. From 1982 through 2000 Dr. Kirkpatrick served as the senior vice president of Carlow International. Prior to joining Carlow in 1982 Dr. Kirkpatrick served as a member of the technical staff at North American Rockwell's Missiles Division and as a project director and vice president for Essex Corporation. His areas of expertise include workload simulation task analysis operator-in-the-loop simulation human performance experimentation statistical analysis and human factors T&E. He has directed and/or participated in human factors projects for the U.S. Navy U.S. Army NASA Department of Transportation the U.S. Nuclear Regulatory Commission and private industry. ANTHONY J. SEMAN III is the technical manager for the reduced ship's crew by virtual presence (RSVP) advanced technology d

Aboard current ships, such as the DDG 51, engineering control and damage control activities are manpower intensive. It is anticipated that, for future combatants, the workload demand arising from operation of systems under conditions of normal steaming and during casualty response will need to be markedly reduced via automated monitoring, autonomous control, and other technology initiatives. Current DDG 51 class ships can be considered as a manpower baseline and under Condition III typical engineering control involves seven to eight watchstanders at manned stations in the Central Control Station, the engine rooms and other machinery spaces. In contrast to this manning level, initiatives such as DD 21 and the integrated engineering plant (IEP) envision a partnership between the operator and the automation system, with more and more of the operator's functions being shifted to the automation system as manning levels decrease. This paper describes some human systems integration studies of workload demand reduction and, consequently, manning reduction that can be achieved due to application of several advanced technology concepts. Advanced system concept studies in relation to workload demand are described and reviewed including. Piecemeal applications of diverse automation and remote control technology concepts to selected high driver tasks in current DDG 51 activities. Development of the reduced ship's crew by virtual presence system that will provide automated monitoring and display to operators of machinery health, compartment conditions, and personnel health. The IEP envisions the machinery control system as a provider of resources that are used by various consumers around the ship. Resource needs and consumer priorities are at all times dependent upon the ship's current mission and the availability of equipment pawnbrokers.

关键词： Naval warfare

来源：评论

学校读者我要写书评

暂无评论

Convection effects in three-dimensional dendritic growth

Convection effects in three-dimensional dendritic growth

引用

ASME 2002 International Mechanical engineering Congress and Exposition, IMECE2002

作者： Lu, Yili Beckermann, C. Karma, A. Department of Mechanical and Industrial Engineering University of Iowa Iowa City IA 52242-1527 United States Department of Physics Center for Interdisciplinary Research on Complex Systems Northeastern University Boston MA 02115 United States

ISBN: (纸本)0791836363

A phase-field model is developed to simulate free dendritic growth coupled with fluid flow for a pure material in three dimensions. The preliminary results presented here illustrate the strong influence of convection on the three-dimensional (3D) dendrite growth morphology. The detailed knowledge of the flow and temperature fields in the melt around the dendrite from the simulations allows for a detailed understanding of the convection effects on dendritic growth. Copyright © 2002 by ASME.

关键词： Flow of fluids

来源：评论

学校读者我要写书评

暂无评论

Investigation of hydrogen carriers for fuel-cell based transportation

Investigation of hydrogen carriers for fuel-cell based trans...

引用

SAE 2002 World Congress

作者： Gay-Desharnais, Sebastien E. Routex, Jean-Yves Holtzapple, Mark Ehsani, Mehrdad Advanced Vehicle Systems Research Program Group Texas A and M Univ. United States Department of Electrical Engineering Texas A and M University College Station TX 77845 United States

Hydrogen is the only fuel for fuel-cells. It may be stored pure onboard the vehicle, but this approach is difficult. It is preferable to attach hydrogen to other elements to form a hydrogen carrier, which will be cracked onboard to feed the fuel-cell. This paper explains the concept of hydrogen carriers, details their preferred characteristics, and compares thoroughly the available candidates. Copyright © 2002 Society of Automotive Engineers, Inc.

关键词： Fuel cells

来源：评论

学校读者我要写书评

暂无评论

The automated lane-changing model of intelligent vehicle highway systems

The automated lane-changing model of intelligent vehicle hig...

引用

International Conference on Intelligent Transportation

作者： Lingxi Li Fei-Yue Wang Center for Intelligent Control and Systems Engineering Institute of Automation Chinese Academy and Sciences Beijing China Advanced research in Complex Systems Department of Systems and Industrial Engineering of University of Arizona Tucson AZ USA

Current traffic control and management systems are mainly macro-level vehicle coordination control models, not to take into account the factors of the individual car in the systems. This paper proposes an intelligent lane-changing model of the intelligent vehicle highway systems. This model is based on the traffic density distribution and safety control methods. Finally, we use simulation software to verify its feasibility and show that this model can achieve a higher traffic throughput and reduce the total travel time.

关键词： Intelligent vehicles Automated highways Traffic control Road transportation Automatic control Throughput Road vehicles Cellular neural networks Weight control Velocity control

来源：评论

学校读者我要写书评

暂无评论

An artificial whisker sensor for robotics

An artificial whisker sensor for robotics

引用

IEEE/RSJ International Conference on Intelligent Robots and systems

作者： M. Lungarella V.V. Hafner R. Pfeifer H. Yokoi Artificial Intelligence Laboratory University of Zurich Zurich Switzerland Research Group of Complex Systems Engineering Hokkaido University Sapporo Japan

In this paper, we present a first series of experiments with prototype artificial whiskers that have been developed in our laboratory. These experiments have been inspired by neuroscience research on real rats. In spite of the enormous potential of whiskers, they have to date not been systematically investigated and exploited by roboticists. Although the transduction mechanism is simple and straightforward, and the whiskers are currently used in a passive way only, the dynamics of the sensory signals resulting from the interaction with various textured surfaces is complex and has a rich information content. The experiments provide the foundation for future work including active sensing, whisker arrays, and cross-modal integration.

关键词： Robot sensing systems Microphones Rats Electrets Design engineering Prototypes Tactile sensors Probes Frequency Hair

来源：评论

学校读者我要写书评

暂无评论

Three improvements on KNN-NPR for traffic flow forecasting

Three improvements on KNN-NPR for traffic flow forecasting

引用

International Conference on Intelligent Transportation

作者： Xiaoyan Gong Feiyue Wang Intelligent Control and Systems Engineering Center Institute of Automation Chinese Academy and Sciences Beijing China Institute of Automation Chinese Academy and Sciences Beijing China Advanced research in Complex Systems Department of Systems and Industrial Engineering of University of Arizona Tucson Tucson AZ USA

research has shown nonparametric regression to hold high potential to accurately forecast short-term traffic flows. However, many fundamental questions remain regarding the ability of KNN-NPR(K nearest neighbor nonparametric regression) to meet real-time system requirements and adequate accuracy requirements. So this paper puts forward three improvements which are: effective traffic state vector selection method based on self-association analysis and association analysis; improved variable K search method based on "dense degree"; and advanced data structures based on a dynamic cluster method and hash-function transformation. A field test fully proves that with three improvements, KNN-NPR can adequately meet real-time system requirements and accuracy requirements.

关键词： Traffic control Real time systems Intelligent transportation systems Accuracy Automatic testing Integrated circuit testing Senior members Filtering algorithms Parametric statistics Databases

来源：评论

学校读者我要写书评

暂无评论

On the intelligent control of a rotary crane, neural network and fuzzy logic approaches

On the intelligent control of a rotary crane, neural network...

引用

IEEE International Symposium on Intelligent Control (ISIC)

作者： A. Ouezri N. Derbel Intelligent Control decision & Optimisation of complex Systems Research Unit (ICOS) National School of Engineering of Sfax (ENIS) University of Sfax Sfax Tunisia

This paper deals with the determination of the optimal control strategies of a rotary crane. Such system is represented by a sixth order nonlinear mathematical model. The proposed idea is based on the decomposition of the system into two interconnected subsystems which are linear with respect to their state and control vectors. The nonlinearities are located in the interconnexion terms. In this context, local feedback gains can be computed by solving a nonlinear Riccati equation, whereas, the local gains depend on the state vector of the other subsystem. Within this approach, a fuzzy logic system and a neural network have been constructed in order to identify these gains. Simulation results show the high performances of the proposals.

关键词： Intelligent control Cranes Neural networks Fuzzy logic Vectors Riccati equations Optimal control Mathematical model Control systems Neurofeedback

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：