检索结果-内蒙古大学图书馆

6th IEEE International Symposium on Object-Oriented Real-Time Distributed Computing, ISORC 2003

作者： Bessani, A.N. Da Silva Fraga, J. Lung, Lau Cheuk DAS CTC UFSC Campus Universitário Caixa Postal 476 - Trindade FlorianópolisSCCEP 88040-900 Brazil Graduate Program in Applied Computer Science Exact Sciences and Technology Center Pontifical Catholic University of Paraná CuritibaParaná Brazil

ISBN: (纸本)0769519288

This paper presents our experiments for integrating OMG MIOP (Mullicast Inter-ORB Protocol) specifications into a CORBA ORB. We proposed an integration model which allows the coexistence of two different protocol stacks (IIOP/TCP/IP and MIOP/UDP/IP multicast), making possible a large spectrum of middleware support for distributed objects communication. That integration model is discussed in this paper, giving evidence of the compatibility of our approach with the CORBA specifications. We also do some considerations about the implementation of this model in a CORBA compliant ORB. © 2003 IEEE.

关键词： Common object request broker architecture (CORBA)

来源：评论

学校读者我要写书评

暂无评论

A zerotree stereo video encoder

A zerotree stereo video encoder

引用

IEEE International Symposium on Circuits and Systems (ISCAS)

作者： S. Thanapirom W.A.C. Fernando E.A. Edirisinghe Telecommunications Program Asian Institute of Technology Klong Luang Pathum Thani Thailand Department of Computer Science Loughborough University Leicestershire UK

Over the past decade, the growing interests in realistic visual communication systems have led to the rapid development of 3D visual compression techniques. A stereoscopic system is one way of simulating 3D perception. Without exploiting the high redundancy in a stereo pair, the amount of data required to store or transmit it is doubled, when compared to that for monocular images. In this paper, we present a new technique for coding stereo video sequences based on the Discrete Wavelet Transform (DWT). The proposed technique exploits Zerotree Entropy Coding (ZTE) that makes use of the wavelet block concept to achieve low bit rate stereo video coding. One of the two image streams, the main stream, is independently coded by a modified zerotree video coder and the second stream, the auxiliary stream, is predicted based on disparity compensation. The residual image of the auxiliary stream is then coded by a modified zerotree video coder. Results show that the proposed encoder can achieve 50% bandwidth reduction compared to the ZTE based monoscopic compression encoder.

关键词： Streaming media Video compression Discrete wavelet transforms Image coding Visual communication Video sequences Entropy coding Bit rate Video coding Bandwidth

来源：评论

学校读者我要写书评

暂无评论

Humanoid arm motion planning using stereo vision and RRT search

Humanoid arm motion planning using stereo vision and RRT sea...

引用

IEEE International Workshop on Intelligent Robots and Systems (IROS)

作者： S. Kagami J. Kuffner K. Nishiwaki K. Okada M. Inaba H. Inoue CREST Program Japan Science and Technology Agency Japan Digital Human Laboratory National Institute for Advanced Industrial Science and Technology Japan School of Computer Science Carnegie Mellon University USA Department of Mechano-Informatics School of Information Science and Technology University of Tokyo Japan

This paper describes an experimental stereo vision based motion planning system for humanoid robots. The goal is to automatically generate arm trajectories that avoid obstacles in unknown environments from high-level task commands. Our system consists of three components: 1) environment sensing using stereo vision with disparity map generation and on-line consistency checking, 2) probabilistic mesh modeling in order to accumulate continuous vision input, and 3) motion planning for the robot arm using RRTs (rapidly exploring random trees). We demonstrate results from experiments using an implementation designed for the humanoid robot H7.

关键词： Stereo vision Humanoid robots Motion planning Humans technology planning Robot sensing systems Orbital robotics Kinematics computer science Information science

来源：评论

学校读者我要写书评

暂无评论

A multi-paradigm simulator for simulating complex adaptive supply chain networks

A multi-paradigm simulator for simulating complex adaptive s...

引用

Simulation Winter Conference

作者： Pathak Dilts Biswas Management of Technology Program (EECS) Vanderbilt University Nashville TN USA Department of Electrical Engineering and Computer Science Vanderbilt University Nashville TN USA

This paper introduces a multi-paradigm dynamic system simulator based on discrete time and discrete event formalism for simulating a supply chain as a complex adaptive system. Little is known about why such a diversity of supply chain structures exist. Simulating dynamic supply chain networks over extended periods using the multi-paradigm dynamic system simulator allows us to observe the emergence of different structures. The simulator is implemented using a software agent technology, where individual agents represent firms in a supply chain network. In this paper, we present an example scenario run on the simulator and the preliminary results that have been observed. This multi-paradigm tool provides a valuable investigation instrument for real life supply chain problems.

关键词： Adaptive systems Supply chains Vehicle dynamics Discrete event simulation Manufacturing industries technology management Software agents Supply chain management Procurement computer industry

来源：评论

学校读者我要写书评

暂无评论

Federation Web: a scheme to compound authorization chains on large-scale distributed systems

Federation Web: a scheme to compound authorization chains on...

引用

Reliable Distributed Systems

作者： A.O. Santin J. da Silva Fraga F. Siqueira E.R. de Mello Graduate Program in Applied Computer Science Exact Sciences and Technology Center Pontifical Catholic University of Paraná Brazil Department of Automation and Systems Federal University of Santa Catarina Brazil Department of Computer Science Federal University of Santa Catarina Brazil

Traditional security systems are not easily scalable and can become single points of failure or performance bottlenecks when used on a large-scale distributed system such as the Internet. This problem occurs also when using a public key infrastructure (PKI) with a hierarchical thrust model. SDSI/SPKI is a PKI that adopts a more scalable trust paradigm, which is focused on the client and based on authorization chains. However, the task of locating the chain that links a client to a server is not completely addressed by SDSI/SPKI. Aiming to overcome this limitation, the paper proposes extensions to the SDSI/SPKI authorization and authentication model. The proposed approach introduces the concept of Federation Webs, which allows the client to build new authorization chains linking it to a server when a direct path does not exist. A prototype implementation of this proposal has shown promising results.

关键词： Authorization Large-scale systems Authentication Internet Scalability computer science Public key Automation computer security Joining processes

来源：评论

学校读者我要写书评

暂无评论

Vision-based 2.5D terrain modeling for humanoid locomotion

Vision-based 2.5D terrain modeling for humanoid locomotion

引用

IEEE International Conference on Robotics and Automation (ICRA)

作者： S. Kagami K. Nishiwaki J.J. Kuffner K. Okada M. Inaba H. Inoue CREST Program Japan Science and Technology Corporation Japan Digital Human Laboratory National Institute for Advanced Industrial Science and Technology Kouto Tokyo Japan Department of Mechano-lnformatics School of Information Science and Technology University of Tokyo Bunkyo Tokyo Japan School of Computer Science Carnegie Mellon University Pittsburgh PA USA

We present an integrated humanoid locomotion and online terrain modeling system using stereo vision. From a 3D depth map, a 2.5D probabilistic description of the nearby terrain is generated. The depth map is calculated from a pair of stereo camera images, correlation-based localization is performed, and candidate planar walking surfaces are extracted. The results are used to update a probabilistic map of the terrain, which is input to an online footstep planning system. Experimental results are shown using the humanoid robot H7, which was designed as a research platform for intelligent humanoid robotics.

关键词： Robot kinematics Legged locomotion Humanoid robots Mobile robots Robot vision systems Intelligent robots Foot Stereo vision Cameras Robot sensing systems

来源：评论

学校读者我要写书评

暂无评论

Thermal Stability of Co-Fe and Cu Multilayered Thin Films

引用

Microscopy and Microanalysis 2003年第S2期9卷 48-49页

作者： Peter F. Ladwig Jesse D. Olson Joseph H. Bunton David J. Larson Martin C. Bonsager Robert M. Ulfig Richard L. Martens Y. Austin Chang Edward Oltman Tye T. Gribb Materials Science Program University of Wisconsin-Madison 1509 University Avenue Madison WI 53706 Imago Scientific Instruments Corporation 6300 Enterprise Lane Madison WI 53719 Recording Head Operations Seagate Technology 7801 Computer Avenue Bloomington MN 55435

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

Adaptation of current signals with floating-gate circuits

Adaptation of current signals with floating-gate circuits

引用

作者： Pesavento, Alberto Horiuchi, Timothy Diorio, Chris Koch, Christof Department of Electrical Engineering California Institute of Technology Pasadena CA 91125 United States Department of Electrical and Computer Engineering University of Maryland College Park MD 20742 United States Department of Computer Science and Engineering University of Washington Seattle WA 98195-2350 United States Computation and Neural Systems Program California Institute of Technology Pasadena CA 91125 United States

In this paper we present a new, adaptive spatial-derivative circuit for CMOS image sensors. The circuit removes its offset as a natural part of its operation using a combination of electron tunneling and hot-electron injection to add or remove charge on a floating-gate of an auto-zeroing amplifier. We designed, fabricated and successfully tested a chip with the circuit. Test results show that the circuit reduces the offsets by more than an order of magnitude.

关键词： Image sensors

来源：评论

学校读者我要写书评

暂无评论

Guest editors' introduction: Biocomputation

引用

Computing in science and Engineering 2002年第1期4卷 18-18页

作者： Kumar, Srikanta Sastry, Shankar Biocomputation Program DARPA's Information Technology Office United States 3701 N. Fairfax Dr. Arlington VA 22203 United States Department of Electrical Engineering and Computer Science University of California Berkeley CA United States 231 Cory Hall Dept. of Electrical Eng. and Computer Sciences Univ. of California Berkeley CA 947201-770 United States

The juxtaposition of computation and biology opens up a new world of science and technology. Richard Feynman characterizes the young and fast-developing world of computer science as follows: "[it] is like engineering-it is all about getting something to do something."1 Viewed from this perspective, the scope of research and development at this intersection is a vast, two-way street that computer science has to offer to biological science and biotechnology and vice versa. Computational thinking helps characterize, predict, and influence the dynamics of biological processes from molecular to cellular to organ in a way that revolutionizes our understanding of health and drug design. In turn, understanding the architecture and principles of natural biological processes and organization might require new models of computation, which could lead to robustness in the design of large-scale software and hardware systems, a hitherto elusive goal.

关键词： Biology computing DNA Biological system modeling computer science Biological processes Drugs Computational modeling Genetics Genomics Bioinformatics

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：