检索结果-内蒙古大学图书馆

conference on Computer Vision and Pattern Recognition (CVPR)

作者： R.E. Suorsa B. Sridhar NASA Ames Research Center Moffett Field CA USA

A system capable of supporting autonomous helicopter navigation must extract obstacle information from imagery at rates varying from ten frames per second to thirty or more frames per second. A parallel implementation of the obstacle detection/ranging method is required. The authors describe an efficient and flexible parallel implementation of a multisensor feature-based range-estimation algorithm, targeted for helicopter flight, realized on both a distributed-memory and shared-memory parallel computer.< >

关键词： optical sensors Helicopters Sensor systems Image motion analysis Vehicle detection Electrooptic devices Parallel processing Computer architecture optical filters NASA

来源：评论

学校读者我要写书评

暂无评论

Some new performance considerations in open distributed environments

Some new performance considerations in open distributed envi...

引用

IEEE International conference on Communications (ICC)

作者： Z. Milosevic M. Phillips Cooperative Research Centre for Distributed Systems Technology University of Queensland Saint Lucia Australia Department of Statistics University of Melbourne Parkville Australia

Some novel issues relevant to emerging open distributed environments, of which a long term intelligent network (IN) architecture represents a telecommunication-specific example, are addressed. IN has the goal of supporting rapid introduction, modification, execution, and management of a broad range of multimedia information services and will build on advances in broadband technologies and open distributed processing. Emphasis is placed on the performance concerns and new quality of servicer requirements as a consequence of new technologies and market forces. The open distributed processing (ODP) trader component is selected to categorize the trader according to various characteristics depending on its possible operational environments. This enables the identification of various trader goals which could be achieved in part by attention to quality of service objectives. A universal publicly owned trader is studied, implementing an essentially social selection policy where an overall system delay is chosen as a performance measure having an impact on quality of service and hence overall enterprise goals. It is concluded that a minimum workload selection policy can produce acceptable system response times under assumptions of quite high delays in the provision of dynamic state information.< >

关键词： Quality of service Intelligent networks Computer architecture Distributed computing Environmental management Acceleration Environmental economics optical devices Computer network management Project management

来源：评论

学校读者我要写书评

暂无评论

6th Mediterranean Electrotechnical conference

6th Mediterranean Electrotechnical Conference

引用

Proceedings of the 6th Mediterranean Electrotechnical conference - Melecon '91

ISBN: (纸本)0879426551

The following topics are dealt with: circuit and system theory;electron devices;electron devices and circuits;microwave and acoustic wave devices and circuits;solar cells and systems;computer aided design;testing and technologies;analog integrated circuits;digital integrated circuits;signal processing;algorithms and circuit implementations;DSP algorithms and circuit implementations;DSP for image processing;DSP for speech processing;telecommunications;ISDN;communication networks;mobile radio;antennas;optical communications;spread spectrum communications;biomedical engineering;biomedical modeling and simulation;control and robotics;model reference adaptive control;robot programming and synthesis of robot control;hardware architecture;software development;real-time systems;artificial intelligence;pattern recognition;low-level vision;power systems;power electronics;electronic equipment;operation planning;industrial power;education programs;and educational tools.

关键词： Signal processing

来源：评论

学校读者我要写书评

暂无评论

Proceedings of the conference on Liquid Crystal Materials, devices, and Applications

Proceedings of the Conference on Liquid Crystal Materials, D...

引用

Proceedings of the conference on Liquid Crystal Materials, devices, and Applications

ISBN: (纸本)0819408190

This conference Proceedings contains 38 papers covering a broad range of interdisciplinary subjects related to the development of liquid crystals and their applications. Session 1 addresses the development of nematic dispersions, in particular, polymer-dispersed liquid crystals, describing significant progress in the understanding of the use of these devices as well as detailing some interesting observations involving their properties. Session 2 is devoted to ferroelectric liquid crystals which offer promise of high speed and bistability, but have been limited by problems in manufacturing and stability. papers describe application of the 'traditional' surface-stabilized ferroelectric liquid crystal device, as well as newer implementations like the deformed helix mode and ferroelectric side-chain liquid crystalline polymers. Session 3 is devoted to materials and processes of the future. Its unifying theme is the preparation and application of novel anisotropic materials. It deals with novel methods of aligning liquid crystals and polymers, photochemically active liquid crystal materials, and nonlinear optical materials and devices. Sessions 4 and 5 are concerned with liquid crystal devices and applications, including high-performance devices, projection display systems, programmable liquid crystal holograms, laser beam deflectors, wavelength image converters, and information processing systems.

关键词： Liquid crystals

来源：评论

学校读者我要写书评

暂无评论

Proceedings of the conference on Liquid Crystal Materials, devices, and Applications

Proceedings of the Conference on Liquid Crystal Materials, D...

引用

Proceedings of the conference on Liquid Crystal Materials, devices, and Applications

ISBN: (纸本)0819408190

关键词： Liquid crystals

来源：评论

学校读者我要写书评

暂无评论

optical communication architectures for multimedia conferencing in distributed systems 12

Optical communication architectures for multimedia conferenc...

引用

12th International conference on Distributed Computing systems, ICDCS 1992

作者： Ramanathan, Srinivas Rangan, P. Venkat Vin, Harrick M. Kaeppner, Thomas Multimedia Laboratory Department of Computer Science and Engineering University of California San DiegoCA92093-0114 United States IBM European Networking Center Heidelberg Germany

ISBN: (纸本)0818628650

The design of techniques and protocols for media mixing and communication architectures that optimize the performance of media mixing are discussed. The performance of monostage and multistage techniques for mixing are compared. Centralized and distributed architectures are analyzed for their suitability to both monostage and multistage media mixing, and hierarchical architectures that significantly reduce bandwidth consumption are presented. algorithms for designing hierarchies that optimize real-time end-to-end delays and a packet train protocol in which the routing nodes can be used as mixers are proposed. © 1992 IEEE.

关键词： Mixing

来源：评论

学校读者我要写书评

暂无评论

Microprocessor based pid controller for low temperature studies

Microprocessor based pid controller for low temperature stud...

引用

conference on Physics and Technology of Semiconductor devices and Integrated Circuits 1992

作者： Rangaiah, S. V. Pandu Reddy, P.N. Reddy, B.P.N. Department of Physics S.V. University Tirupati517 502 India

In any laboratory to carry out temperature dependent studies a reliable temperature controller is required. Temperature controi! lers may be of analog or digital type. The main drawbacks of the analog controllers are (i) limited controllability or automation and (ii) hardware limitations in implementing mathematical computations. Digital controllers are flexible as the implementabtion of the control schemes are carried out by software only. Hence, the hardware restrictions of analog controllers can be completely eliminatec Automatic control of process parameters can be accomplished by different contrOl schemes or control algorithms such as Proportional (P), Proportional + Integral (P1), Proportinal + Differential (PD), Proportional + Integral + Differential (PID) algorithms. All the controllers produce a control output by operating on the error signal or a time series of error signals. Most process loops where the plant transfer function has not been completely defined are controlled by PID control algorithms. PID control schems can be implemented in different forms such as (i) positional or whole value form (ii) incremental or velocity form. Of the two, velocity form of PID algorithm provides certain advantages over the other. In this paper, a modified velocity form PID algorithm developed in our laboratory to control the process namely temperature is described.

关键词： Analog electronics Algorithm development Amplifiers Automatic control Process control Control systems Signal processing Software development Line edge roughness Physics

来源：评论

学校读者我要写书评

暂无评论

4th International Parallel Architectures and Languages Europe conference, PARLE 1992

4th International Parallel Architectures and Languages Europ...

引用

4th International Parallel Architectures and Languages Europe conference, PARLE 1992

ISBN: (纸本)9783540555995

The proceedings contain 76 papers. The special focus in this conference is on Parallel Architectures and Languages Europe. The topics include: A parallel computer system for advanced information processing;a decompositional approach to the design of efficient parallel programs;space-efficient parallel merging;on embedding interconnection networks into rings of processors;asynchronous mobile processes and graph rewriting;PTAH introduction to a new parallel architecture for highly numeric processing;optimal algorithms for dissemination of information in generalized communication modes;efficient parallel algorithms on interval graphs;a SIMD computer performing the low and intermediate levels of image processing;1-dimensional parallel FFT benchmark on SUPRENUM;on designing fault-tolerant extensions with optimal fanout for complete bipartite networks;application-specific deadlock free wormhole routing on multicomputers;scalability problems in multiprocessors with private caches;promises and issues in optical computing;a model to design reusable parallel software components;extensibility and reuse of object-oriented synchronization components;using parallelism and pipeline for the optimisation of join queries;performance evaluation of parallel transaction processing in shared nothing database systems;explicit expression of multidimensional data parallelism;programming massively parallel architectures with sequential object oriented languages;a new program transformation to minimise communication in distributed memory architectures;distributed termination enforcement;verification of systolic architecture designs;reduction operators in alpha;an operational semantics for a parallel functional language with continuations;a concurrent and distributed extension of scheme;new techniques for cycle shrinking and loop restructuring techniques for thrashing problem.

关键词：

来源：评论

学校读者我要写书评

暂无评论

optical CONTENT-ADDRESSABLE PARALLEL PROCESSOR - ARCHITECTURE, algorithms, AND DESIGN CONCEPTS

引用

APPLIED OPTICS 1992年第17期31卷 3241-3258页

作者： LOURI, A The author is with the Department of Electrical and Computer Engineering University of Arizona Tucson Arizona 85721.

Associative processing based on content-addressable memories has been argued to be the natural solution for nonnumerical information processing applications. Unfortunately, the implementation requirements of these architectures when one uses conventional electronic technology have been cost prohibitive;therefore associative processors have not been realized. Instead, software methods that emulate the behavior of associative processing have been promoted and mapped onto conventional location-addressable systems. However, this does not bring about the natural parallelism of associative processing, namely, the ability to access many data words simultaneously. Optics has the advantage over electronics of directly supporting associative processing by providing economic and efficient interconnects, massive parallelism, and high-speed processing. The principles of designing an optical content-addressable parallel processor (OCAPP) for the efficient support of parallel symbolic computing are presented. The architecture is designed to exploit optics advantages fully in interconnects and high-speed operations. Several parallel search-and-retrieval algorithms are mapped onto an OCAPP to illustrate its capability of supporting parallel symbolic computing. A theoretical performance analysis of these algorithms is presented. This analysis reveals that the execution times of the parallel algorithms presented are independent of the problem size, which makes the OCAPP suitable for applications in which the number of data sets to be operated on is high (e.g., massive parallel processing). A preliminary optical implementation of the architecture with currently available optical components is also presented.

关键词： Image processing Nonlinear optical devices optical components optical computing optical logic devices Parallel processing

来源：评论

学校读者我要写书评

暂无评论

Optoelectronical identification of glass characteristics

Optoelectronical identification of glass characteristics

引用

IEEE Instrumentation and Measurement Technology conference

作者： D. Hofmann F. Gassmann Department of Measurement Engineering and Quality Assurance Friedrich-Schiller-Universitãt Jena Jena Germany

Selected algorithms and application problems connected with identification methods for glass strength behavior are reported. Contactless objective image processing procedures for smart metrical measurements of break cones within glass probes are described. Technologies for the modeling of mechanical edges by optical images and for statistical edge detection with pixel resolution are presented. Special emphasis is given to the explanation of differences between static and dynamic edge detections, as well as differences between measurements with pixel and subpixel resolutions.< >

关键词： Glass optical sensors Probes Testing Image processing optical microscopy Area measurement Charge coupled devices Charge-coupled image sensors Sensor 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：