共查询到20条相似文献,搜索用时 80 毫秒
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赵艳 《计算机与信息技术》2009,(5)
神经计算科学是从信息科学的角度,用计算的方法研究神经网络如何模仿和延伸人脑活动的机理及实现类脑智能信息系统的问题。量子神经计算是量子计算与神经计算相结合的产物。文中主要阐述了神经计算的研究现状,在其基础上对量子神经计算的概念及模型进行了介绍,综述了国内外的研究动态与发展趋势。 相似文献
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一种通用神经计算并行模型NCPM 总被引:1,自引:0,他引:1
在对神经计算特点分析的基础上,本文提出一种通用的神经计算并行模型NCPM,论述了通用神经计算并行模型的定义以及神经计算并行性开发方法,并对该模型进行综合评价。 相似文献
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神经计算是一门崭新的信息处理学科,研究非程序的,适应性的,大脑风格的信息处理的本质和能力。它的研究对象是人工神经网络,即由大量神经元组成的非线性动力系统。本文介绍用微分流形研究神经信息处理的重要概念,讨论研究机理和方法。 相似文献
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介绍了神经计算平台的整体架构,阐述了网格分布式超级计算理论在神经计算平台中的应用,并详述了具体的设计与实现,最后分析了该方法的优势. 相似文献
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面向神经计算的并行计算机体系结构是神经网络研究中的一项重要工作。本文在对大量的神经计算进行需求分析的基础上,讨论了以高性能的微处理器作为计算单元,进行面向神经计算的并行计算机体系结构设计,并且介绍了它原型实现的结构、参数和性能 相似文献
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张春元 《计算机研究与发展》1998,35(4):362-366
文中主要以一个面向神经计算的并行计算机系统NeuroC为背景,讨论一种并行计算机性能分析模型,并对NeuroC进行性能分析.根据实际并行神经计算模型、NeuroC的结构和计算特点,给出了并行神经计算中一些与性能相关的结论,最后给出了一些系统实际测试结果. 相似文献
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盲分离的目的是从观测到的混叠信号中恢复出各个未知的源信号,现今的很多方法都是利用了信号时域表示的某些统计特性来解决这个问题。从信号频域分析的角度提出了一种利用信号的循环平稳特性来处理离散时间信号的频域盲分离方法。该方法构造两个二阶统计矩阵的乘积,并对该乘积矩阵进行特征值分解,从而实现源信号的分离;同时,还对特征值分解的条件进行了分析。该方法在低维信号的情况下可以取得相当满意的分离效果,仿真结果表明该方法具有良好的性能。 相似文献
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未来的世界粮食供应状况决定着作物科学的研究方向。在对大量文献进行分析研究的基础上 ,概述并展望了粮食过剩、粮食短缺以及区域粮食短缺情况下作物科学的优先研究领域。文章最后还强调了正确选择作物科学优先研究领域的重要性。 相似文献
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Through a wide variety of approaches cognitive sciencehas given us various important insights into thenature of diagrammatic representations. This papersurveys the findings, issues and approaches todiagrammatic representations in cognitive science. Important current issues that are highlighted include:the relation between the parts of the representationalsystem that are internal to the mind and in externalvisual media that presents the diagram; the use ofmultiple representations which is typical of realcontexts of diagram use; the benefits of diagrams interms of (i) computational offloading, (ii)re-representation and (iii) graphical constraining. 相似文献
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My purpose in this essay is to clarify the notion of explanation by computer simulation in artificial intelligence and cognitive science. My contention is that computer simulation may be understood as providing two different kinds of explanation, which makes the notion of explanation by computer simulation ambiguous. In order to show this, I shall draw a distinction between two possible ways of understanding the notion of simulation, depending on how one views the relation in which a computing system that performs a cognitive task stands to the program that the system runs while performing that task. Next, I shall suggest that the kind of explanation that results from simulation is radically different in each case. In order to illustrate the difference, I will point out some prima facie methodological difficulties that need to be addressed in order to ensure that simulation plays a legitimate explanatory role in cognitive science, and I shall emphasize how those difficulties are very different depending on the notion of explanation involved. 相似文献
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The paper presents some main progresses and achievements in Chinese information processing. It focuses on six aspects, i.e., Chinese syntactic analysis, Chinese semantic analysis, machine translation, information retrieval, information extraction, and speech recognition and synthesis. The important techniques and possible key problems of the respective branch in the near future are discussed as well. 相似文献
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On-line Algorithm for Blind Signal Extraction of Arbitrarily Distributed,but Temporally Correlated Sources Using Second Order Statistics 总被引:4,自引:0,他引:4
Most of the algorithms for blind separation/extraction and independent component analysis (ICA) can not separate mixtures of sources with extremely low kurtosis or colored Gaussian sources. Moreover, to separate mixtures of super- and sub-Gaussian signals, it is necessary to use adaptive (time-variable) or switching nonlinearities which are controlled via computationally intensive measures, such as estimation of the sign of kurtosis of extracted signals. In this paper, we develop a very simple neural network model and an efficient on-line adaptive algorithm that sequentially extract temporally correlated sources with arbitrary distributions, including colored Gaussian sources and sources with extremely low values (or even zero) of kurtosis. The validity and performance of the algorithm have been confirmed by extensive computer simulation experiments. 相似文献