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Measurement Technology for Engine Assembly

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武汉理工大学学报 2006年第S3期28卷 978-982页

作者： GAO Li~1 ZHENG Zeyu~2.DAI Shangping~1 (1.Department of computer science,Central China {2. university,Wuhan 430079,China 2.School of computer science and Technology,Huazhong university of science and Technology,Wuhan 430074,China) Department of computer science Central China Normal UniversityWuhan 430079China School of computer {2. and Technology Huazhong University of Science and TechnologyWuhan 430074China

In many industrial,it is often necessary to analyze the engine *** paper introduces three kinds of new technologies on the assembly line of engine in recent years,it have played the positive role in improving the qual... 详细信息

关键词： quality control measured engine assembly

On Hua-Tuan's conjecture

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science China mathematics 2009年第2期52卷 389-393页

作者： ZHANG QinHai & QU HaiPeng School of mathematics and {2. sciences, Shanxi normal university, Linfen 041004, China 1. School of mathematics and {2. sciences Shanxi Normal University Linfen 041004 China

Let G be a finite group and |G| = pn, p be a prime. For 0 m n, sm(G) denotes the number of subgroups of of order pm of G. Loo-Keng Hua and Hsio-Fu Tuan have ever conjectured: for an arbitrary finite p-group G, if p > 2. then sm(G) ≡ 1, 1 + p, 1 + p + p2.or 1 + p + 2.2.(mod p3). In this paper, we investigate the conjecture, and give some p-groups in which the conjecture holds and some examples in which the conjecture does not hold.

关键词： Hua-Tuan’s conjecture metacyclic p-groups abelian p-groups inner abelian p- groups superspecial p-groups

The t/t-Diagnosability of the m-Ary n-Cubes

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International Journal of Systems and Control

International Journal of Systems and Control 2008年第1期 1-6页

作者： ZHOU Shuming1,HENG Shuxia2.1.Key Laboratory of Network Security and Cryptology, Fujian normal university, Fuzhou 350007, China 2. College of {2. and computer science, Fujian normal university, Fuzhou 350007, China

The growing size of the multiprocessor systems increases their vulnerability to component failures. It is crucial to local and to replace the fault processors to maintain system's high reliability. The fault diagnosis is the process of identifying fault processors in a system through testing. This paper establishes the t/t-diagnosability of the m-ary n-cube Qn m with m > 3,and shows that the t/t-diagnosabilities of Qn m under the PMC model is 4n-2.

关键词： t/t-diagnosability, m-Ary n-Cube PMC model

Spatio-temporal pattern analysis of single-trial EEG signals recorded during visual object recognition

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science China(Information sciences) 2011年第12期54卷 2519-2527页

作者： WANG ChangMing 1 , HU XiaoPing 3 , YAO Li 1,2., XIONG Shi 2.& ZHANG JiaCai 2.1 National Key Laboratory of Cognitive Neuroscience and Learning, Beijing normal {2., Beijing 100875, China 2.College of Information science and Technology, Beijing normal {2., Beijing 100875, China 3 Biomedical Imaging Technology Center, Emory {2./Georgia Institute of Technology, Atlanta 3032., USA 1. National Key Laboratory of Cognitive Neuroscience and Learning Beijing Normal University Beijing 100875 China3. Biomedical Imaging Technology Center Emory University/Georgia Institute of Technology Atlanta 30322 USA2. College of Information Science and Technology Beijing Normal University Beijing 100875 China

Object discrimination is a fundamental cognitive function for human brains. In this study, we utilized an analysis approach for single-trial electroencephalography (EEG) to analyze the spatio-temporal activation patterns of visual objects processing in human brains, and attempted to apply it to discriminate different visual objects. The spatial patterns were respectively extracted from scalp EEG and the reconstructed cortical sources, while the experiment participants were perceiving 4 different categories of visual objects (faces, buildings, cats and cars). By classifying the patterns extracted from single-trial EEG, the presented visual objects could be discriminated by a computer, and the classification accuracies may provide a quantitative index to evaluate the spatial differences of the brain activations related to different visual objects. Our results demonstrated that the spatial patterns on both the scalp and the sources levels resulted in higher classification accuracies than chance rate. We also examined the classification results using temporally non-overlapping time intervals of different event-related potential (ERP) components. The temporal changes of classification accuracies may reflect the temporal distribution of the discriminative information in the EEG responses. The present pattern extraction and classification methods may compose a computational model for single-trial EEG data analysis in investigations of the spatio-temporal activation patterns for object recognition. These spatio-temporal patterns in EEG may be useful to identifying the discriminative spatial areas and time stages to improve the accuracies and efficiencies of object discrimination. In addition, investigating and utilizing humans'cognitive mechanisms of object recognition may improve computers' processing efficiency of visual information.

关键词： EEG spatio-temporal pattern object recognition single-trial analysis visual information processing

Explicit classes of permutation polynomials of F33m

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science China mathematics 2009年第4期52卷 639-647页

作者： DING CunSheng1, XIANG Qing2. YUAN Jin3 & YUAN PingZhi4 1 Department of computer science and Engineering, The Hong Kong {2. of science and Technology, Clearwater Bay, Kowloon, Hong Kong, China 2.Department of Mathematical sciences, {2. of Delaware, Newark, DE 19716, USA 3 Department of Computing, Macquarie {2., NSW 2.09, Australia 4 School of mathematics, South China normal {2., Guangzhou 510631, China Department of computer science and Engineering The Hong Kong University of Science and Technology Hong Kong China Department of Mathematical sciences University of Delaware Newark USA Department of Computing Macquarie University Sydney Australia School of mathematics South China Normal University Guangzhou China

Permutation polynomials have been an interesting subject of study for a long time and have applications in many areas of mathematics and engineering. However, only a small number of specific classes of permutation polynomials are known so far. In this paper, six classes of linearized permutation polynomials and six classes of nonlinearized permutation polynomials over F33m are presented. These polynomials have simple shapes, and they are related to planar functions.

关键词： permutation polynomials planar functions

无穷凹角区域椭圆边值问题的重叠型区域分解算法

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数值计算与计算机应用 2004年第2期25卷 90-99页

作者：杨敏杜其奎河海大学理学院南京210098 南京师范大学数学与计算机科学学院南京210097

In this paper, we investigate an overlapping domain decomposition algorithm for elliptic boundary value problems over an infinite domain with concave *** algorithm is constructed, and its convergence is discussed. The finite element method and natural boundary element are alternatively applied to solve a bounded subdomain and a typical unbounded subdomain. It has overcome the difficulty met in standard domain decomposition method for problems with unbounded *** convergence rate is analysed in details for a typical domain. Finally, some numerical example are presented to show effectiveness of our method.

关键词：偏微分方程边值问题边界算法