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[1991] IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Conference Proceedings最新文献

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Fire-fighter: a decision support system for fire management 消防队员:消防管理决策支持系统
[1991] IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Conference Proceedings Pub Date : 1991-05-09 DOI: 10.1109/PACRIM.1991.160803
K. Li, E. Miska
{"title":"Fire-fighter: a decision support system for fire management","authors":"K. Li, E. Miska","doi":"10.1109/PACRIM.1991.160803","DOIUrl":"https://doi.org/10.1109/PACRIM.1991.160803","url":null,"abstract":"Fire-fighter acts as an intelligent assistant for the on-scene commander of a fire emergency on a naval vessel. Given a ship's model with information of the configuration, contents, fire-fighting resources, and some fire-specific knowledge, Fire-fighter will develop a fire management plan to suppress the fire. Fire-fighter is based on script-based planning. Scripts are skeleton plans which are similar in concept to contingency plans for emergencies. The known situation data is used to instantiate the skeleton plan. Fire-fighter interleaves planning, execution, and monitoring to better react to a changing environment. To measure the success of its emergency actions, Fire-fighter will monitor the progress of the plan. When actions fail or appear to be failing replanning will commence. In a hazardous environment, care must be taken to safely replan. Fire-fighter uses domain-dependent knowledge to determine why goals are not being met. Once the cause of failure is known, one can determine where to alter the plan and the appropriate steps to take.<<ETX>>","PeriodicalId":289986,"journal":{"name":"[1991] IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Conference Proceedings","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125237594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
An active dual-gate GaAs FET mixer for 800 MHz low current consumption mountain top repeaters 一种用于800mhz低电流消耗山顶中继器的有源双栅GaAs FET混频器
[1991] IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Conference Proceedings Pub Date : 1991-05-09 DOI: 10.1109/PACRIM.1991.160683
B. Buxton, R. Vahldieck, J. Bornemann
{"title":"An active dual-gate GaAs FET mixer for 800 MHz low current consumption mountain top repeaters","authors":"B. Buxton, R. Vahldieck, J. Bornemann","doi":"10.1109/PACRIM.1991.160683","DOIUrl":"https://doi.org/10.1109/PACRIM.1991.160683","url":null,"abstract":"A dual-gate GaAs FET mixer for use in a low-noise receiver front end in the frequency range of 800 to 900 MHz is presented. The circuit is made on a low-cost 0.062-in fiber glass substrate with in /sub r/ of 4.2 and is designed with inexpensive common surface mount components. The prototype has a third-order intercept of 9 dBm, with respect to the output level, a minimum gain of 13.9 dB, and a sensitivity of -119.3 dBm when driven with an LO power of -2 dBm and with a drain current of 3.0 mA. For improved performance and for easier integration into the receiver, the output impedance is set at 1500 Omega .<<ETX>>","PeriodicalId":289986,"journal":{"name":"[1991] IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Conference Proceedings","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116658412","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Fast acquisition frequency synthesizer with the multiple phase detectors 多相检波器快速采集频率合成器
[1991] IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Conference Proceedings Pub Date : 1991-05-09 DOI: 10.1109/PACRIM.1991.160827
D. Park, S. Mori
{"title":"Fast acquisition frequency synthesizer with the multiple phase detectors","authors":"D. Park, S. Mori","doi":"10.1109/PACRIM.1991.160827","DOIUrl":"https://doi.org/10.1109/PACRIM.1991.160827","url":null,"abstract":"The authors propose a frequency synthesizer which is implemented by deploying a multiple phase detector scheme, and by adding a bias voltage corresponding to desired frequency to the input of a voltage controlled oscillator (VCO) and resetting each divider. One can obtain a fast acquisition time within one cycle of the reference frequency. The acquisition time which is generated by the variation of bias voltage in the VCO due to temperature characteristics can also be minimized by using the proposed multiple phase detectors. The authors have compared the acquisition time of the new frequency synthesizer with a conventional frequency synthesizer and a significant improvement was obtained. The performance was verified by experiments.<<ETX>>","PeriodicalId":289986,"journal":{"name":"[1991] IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Conference Proceedings","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116892412","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 12
Experiments on a flexible one-link manipulator 柔性单连杆机械手的实验研究
[1991] IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Conference Proceedings Pub Date : 1991-05-09 DOI: 10.1109/PACRIM.1991.160730
W. Qian, C.C.Y. Ma
{"title":"Experiments on a flexible one-link manipulator","authors":"W. Qian, C.C.Y. Ma","doi":"10.1109/PACRIM.1991.160730","DOIUrl":"https://doi.org/10.1109/PACRIM.1991.160730","url":null,"abstract":"A single-link flexible arm setup has been built. The major objective is to use it as a testbed to explore and investigate new controller designs and the related control problems for this kind of plant. The experiments reported are concerned with model identification and several existing control law implementations. One interesting result obtained in identification is that all of the first three flexible modes of this plant tend to destabilize the system. The approximate linear model identified, which includes the viscous friction at the joint, is verified in the control experiments.<<ETX>>","PeriodicalId":289986,"journal":{"name":"[1991] IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Conference Proceedings","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127148910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Hypercycles: a status report 超循环:状态报告
[1991] IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Conference Proceedings Pub Date : 1991-05-09 DOI: 10.1109/PACRIM.1991.160694
N. Dimopoulos, R. Sivakumar, V. Dimakopoulos, M. Chowdhury, D. Radvan
{"title":"Hypercycles: a status report","authors":"N. Dimopoulos, R. Sivakumar, V. Dimakopoulos, M. Chowdhury, D. Radvan","doi":"10.1109/PACRIM.1991.160694","DOIUrl":"https://doi.org/10.1109/PACRIM.1991.160694","url":null,"abstract":"The authors present the Hypercycles, a class of multidimensional graphs, which are generalizations of the n-cube. These graphs are obtained by allowing each dimension to incorporate more than two elements and a cycle interconnection strategy. Hypercycles offer simple routing and the ability, given a fixed degree, to choose among a number of alternative size graphs. These graphs can be used in the design of interconnection networks for distributed systems tailored specifically to the topology of a particular application. A backtrack-to-the-origin-and-retry routing scheme in which paths that block at intermediate nodes are abandoned and a new attempt is made is presented. Intermediate nodes are chosen at random at each point from among the ones that form the shortest paths from a source to a destination. Simulation results that establish the performance of a variety of configurations are presented. In addition, the initial attempt at constructing a Hypercycle-based router is discussed.<<ETX>>","PeriodicalId":289986,"journal":{"name":"[1991] IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Conference Proceedings","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127510984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A neural network for deblurring an image 用于消除图像模糊的神经网络
[1991] IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Conference Proceedings Pub Date : 1991-05-09 DOI: 10.1109/PACRIM.1991.160776
C.M. Jubien, M. R. Jernigan
{"title":"A neural network for deblurring an image","authors":"C.M. Jubien, M. R. Jernigan","doi":"10.1109/PACRIM.1991.160776","DOIUrl":"https://doi.org/10.1109/PACRIM.1991.160776","url":null,"abstract":"A neural network architecture for deblurring a blurry scene without prior knowledge of the blur is proposed. Two different training algorithms are described, one a standard neural network training algorithm (employing the least mean squares (LMS) rule) and the second an original algorithm, dubbed algorithm-X. Both were successful for developing inverse blur filters to enhance a blurry picture. Algorithm-X is computationally less complex than the LMS algorithm, and in tests comparing the training times of the two algorithms, algorithm-X was found to be faster.<<ETX>>","PeriodicalId":289986,"journal":{"name":"[1991] IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Conference Proceedings","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124727017","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
An LU factorization algorithm for parallel supercomputers with memory hierarchies 具有内存层次结构的并行超级计算机的LU分解算法
[1991] IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Conference Proceedings Pub Date : 1991-05-09 DOI: 10.1109/PACRIM.1991.160670
Y. Seo, Y. Shiroto, N. Nishi, R. Nakazaki
{"title":"An LU factorization algorithm for parallel supercomputers with memory hierarchies","authors":"Y. Seo, Y. Shiroto, N. Nishi, R. Nakazaki","doi":"10.1109/PACRIM.1991.160670","DOIUrl":"https://doi.org/10.1109/PACRIM.1991.160670","url":null,"abstract":"A parallel algorithm for solving LU factorization of huge dense matrices was developed for parallel vector supercomputers with a hierarchy of memory layers (i.e., local memories, shared memory, semiconductor extended storage, and magnetic disk). The algorithm is based on Gaussian elimination and optimizes data transfers among memory layers by recursively using a block partitioning method. Using four memory layers, an LU factorization for a 32768*32768 dense matrix was calculated in 640 min on the HPP-LHS supercomputer system developed under the MITI (Ministry of International Trade and Industry) Supercomputer Project. Required memory capacity for the gigantic matrix is 8 GB, and the whole matrix data area was allocated to magnetic disk for this calculation. The execution speed with four processors was 2.8 times faster than that with one processor, even using a magnetic disk, and the algorithm was proved to be effective.<<ETX>>","PeriodicalId":289986,"journal":{"name":"[1991] IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Conference Proceedings","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114123909","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A new motion estimation algorithm 一种新的运动估计算法
[1991] IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Conference Proceedings Pub Date : 1991-05-09 DOI: 10.1109/PACRIM.1991.160815
Hui Zhang, Zhenya He
{"title":"A new motion estimation algorithm","authors":"Hui Zhang, Zhenya He","doi":"10.1109/PACRIM.1991.160815","DOIUrl":"https://doi.org/10.1109/PACRIM.1991.160815","url":null,"abstract":"The block-matching algorithm (BMA) is widely used for image sequence coding. In the conventional BMA, the blocks within a frame are processed independently and the intensity variations are not considered. The authors present a motion estimation algorithm in which the correlation of interblock is used to save the computations, and the variations of image intensity are considered for the improvement of estimated motion vector accuracy. The simulation results show that the performance of the motion estimation algorithm is better than that of the 2-D logarithmic search method.<<ETX>>","PeriodicalId":289986,"journal":{"name":"[1991] IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Conference Proceedings","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114402274","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Simplified coherent detection of bandwidth-efficient CPFSK/CPM modulations 带宽高效CPFSK/CPM调制的简化相干检测
[1991] IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Conference Proceedings Pub Date : 1991-05-09 DOI: 10.1109/PACRIM.1991.160709
S. Simmons
{"title":"Simplified coherent detection of bandwidth-efficient CPFSK/CPM modulations","authors":"S. Simmons","doi":"10.1109/PACRIM.1991.160709","DOIUrl":"https://doi.org/10.1109/PACRIM.1991.160709","url":null,"abstract":"A new unified approach is taken in which simple low-pass filters are used after quadrature demodulation, and are followed by a sampler and reduced-computation sequence estimation algorithm. As the number of samples per baud increases, optimal performance is closely approached. The computational complexity can be minimized by choosing a narrow filter that actually modifies the received signal shapes; the sequence estimation algorithm accounts for introduced ISI. It is shown for representative modulations that near-optimal performance can be achieved with simple low-pass filtering, just two samples per baud, and trellis search with only a few survivor paths.<<ETX>>","PeriodicalId":289986,"journal":{"name":"[1991] IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Conference Proceedings","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128653359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Multifunction workstation integrated voice/data/graphics for the ISDN environment 多功能工作站集成语音/数据/图形的ISDN环境
[1991] IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Conference Proceedings Pub Date : 1991-05-09 DOI: 10.1109/PACRIM.1991.160772
Chewei Huang, G. Bi, Q. Chen, Li Li
{"title":"Multifunction workstation integrated voice/data/graphics for the ISDN environment","authors":"Chewei Huang, G. Bi, Q. Chen, Li Li","doi":"10.1109/PACRIM.1991.160772","DOIUrl":"https://doi.org/10.1109/PACRIM.1991.160772","url":null,"abstract":"The authors focus on the development of a multifunction workstation for the ISDN environment, integrating voice, data, and graphics information. The configuration and services of the workstation are introduced. The multimedia protocol and multimedia synchronization are discussed, and the implementation of the ISDN communication control unit (CCU) board and the CCU interface to the host computer are described. In addition, a brief discussion is included on how to counteract weakness of the multitasking operation system in read-time support. The architecture and implementation of the basic system software and the relationship between parallel processes are described. Some applications of multifunction workstations are introduced.<<ETX>>","PeriodicalId":289986,"journal":{"name":"[1991] IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Conference Proceedings","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129318179","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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