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Estimation of Maximal Dimensions of Commutable Matrix Spaces

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Advances in Manufacturing 2000年第3期4卷 186-193页

作者： TANG Jianguo 1,2.1. college of Sciences, Shanghai University, Shanghai 2.0436, china 2. Department of Mathematics, Lingling {2. college, Yongzhou, Hunan 42.006, china college of Sciences Shanghai University Shanghai 200436 China Department of Mathematics Lingling Teachers College Yongzhou Hunan 425006 China

In this paper, a lower bound of maximal dimensions of commutable matrix spaces (CMS) is given. It is found that the linear dependence of a group of one to one commutable matrices is related to whether some equations in system can be eliminated. The corresponding relation is given. By introducing conceptions of eliminating set and eliminating index, we give an estimation of upper bound of maximal dimensions of CMS. For special cases n=5,6, the further estimation of maximal dimensions of CMS is presented.

关键词： commutable matrix space maximal dimension linear dependence Jordan block order little block

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沉积粒子能量对薄膜早期生长过程的影响

物理学报 2001年第12期50卷 2446-2451页

作者：陈敏魏合林刘祖黎姚凯伦华中科技大学物理系

利用MonteCarlo(MC)模型研究了能量粒子对薄膜生长的初始阶段岛膜的形貌和岛的尺寸的影响 ,沉积粒子的能量范围为 :0— 0 .7eV .在模型中考虑了原子沉积、吸附原子扩散和蒸发等过程 ,并详细考虑了临近和次临近原子的影响 .结果表明 ,在... 详细信息

利用MonteCarlo(MC)模型研究了能量粒子对薄膜生长的初始阶段岛膜的形貌和岛的尺寸的影响 ,沉积粒子的能量范围为 :0— 0 .7eV .在模型中考虑了原子沉积、吸附原子扩散和蒸发等过程 ,并详细考虑了临近和次临近原子的影响 .结果表明 ,在所采用的参量范围内不同的基底温度情况下 ,能量粒子的影响有很大的区别 .低基底温度情况下 ,沉积粒子强烈地影响着薄膜的生长过程中 ,岛膜的形貌、数量和尺寸随能量粒子的能量增加而有很大的变化 .分析表明。

关键词：薄膜生长 Monte Carlo方法扩散沉积粒子能量

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可重用的IP认证平台的设计

微机发展 2005年第1期15卷 61-64页

作者：詹文法张振林慧君张溯合肥工业大学微电子设计研究所

随着SoC出现,出现了大量可重用的IP库。这些IP可能来自公司内部的不同部门,也有可能来自外部的IP供应商。一方面为了使IP用户可以在芯片设计中更好地使用一些可重用的IP块,另一方面IP供应商也需要对IP的可重用性进行估计,以便通过不断... 详细信息

随着SoC出现,出现了大量可重用的IP库。这些IP可能来自公司内部的不同部门,也有可能来自外部的IP供应商。一方面为了使IP用户可以在芯片设计中更好地使用一些可重用的IP块,另一方面IP供应商也需要对IP的可重用性进行估计,以便通过不断改善设计方法学和设计技术最终能设计高可重用的IP块,因此需要对IP的可重用性进行评估,相应的就需要有一套完善的IP可重用性的评估系统。在分析了重用方法学手册和OpenMORE的基础上,讨论了可重用的IP认证平台的设计与开发,指出了已有系统的不足,提出了用数据库理论和使用VisualBasic6.0来实现,并进一步对系统设计中的ADO技术、树型目录结构等一些关键技术提出了实现方法。

关键词：可重用性认证平台设计系统芯片验证

Global Optimization for Semi-supervised K-means

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Global Optimization for Semi-supervised K-means

ON F-z-SUPPLEMENTED SUBGROUPS OF FINITE GROUPS

2.09 Asia-Pacific Conference on Information Processing

作者： Xue Sun 1 Kunlun Li 1 Rui Zhao 1 1. college of Electronic and Information Engineering Hebei University Baoding china Xikun Hu 2.2. Industral and Commercial college Hebei University Baoding china

So far most of the K-means algorithms use the number of the labeled data as the K value, but sometimes it doesn’t work well. In this paper, we propose a semi-supervised K-means algorithm based on the global optimization. It can select an appropriate number of clusters as the K value directly and plan a great amount of supervision data by using only a small amount of the labeled data. Combining the distribution characteristics of data sets and monitoring information in each cluster after clustering, we use the voting rule to guide the cluster labeling in the data sets. The experiments indicated that the global optimization algorithm for semi-supervised K-means is quite helpful to improve the K-means algorithm, it can effectively find the best data sets for K values and clustering center and enhancing the performance of clustering.

关键词： Semi-supervised clustering Optimization algorithm K-means Threshold

来源： cnki会议评论

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Acta Mathematica Scientia 2011年第1期31卷 22-28页

作者：郭文彬唐娜李保军 Department of Mathematics University of Science and Technology of China Department of Mathematics Xuzhou Normal University Department of Mathematics Huaiyin Teachers College School of Mathematics Chengdu University of Information Technology

A subgroup H of a group G is called F-z-supplemented in G if there exists a subgroup K of G, such that G = HK and H∩K≤ Z∞F（G）, where Z∞F（G） is the F-hypercenter of G. We obtain some results about the F-z-suppl... 详细信息

关键词： Finite groups local formations F-z-supplemented subgroups supersoluble groups p-nilpotent groups

A structural, magnetostrictive and Mssbauer study of Tb0.3Dy0.7(Fe0.9T0.1)1.95 alloys

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Science china(Physics,Mechanics & Astronomy) 2005年第6期Mechanics & Astronomy) .卷 750-756页

作者： ZHENG Xiaoping1,2. ZHANG Peifeng1,3, FAN Duowang1, LI Fashen3 & HAO Yuan4 1. Key Laboratory of Opto-Electronic technology and Intelligent Control, Education Ministry of china, Lanzhou Jiaotong University, Lanzhou 730070, china 2. Lanzhou teachers college, Lanzhou 730070, china 3. Key Laboratory for Magnetism and Magnetic Materials, Education Ministry of china, Lanzhou University, Lanzhou 730000, china 4. State Key Laboratory of New Nonferrous Metal Materials, Lanzhou University of technology, Lanzhou 730050, china

The effect of Ⅲ A metal and transition metal T substitution for Fe on crystal structure, magnetostriction and spontaneous magnetostriction, anisotropy and spin reorientation of a series of polycrystalline Tb0.3Dy0.7(Fe0.9T0.1)1.95 (T = Mn, Fe, Co, B, Al, Ga) alloys at room temperature were investigated systematically. It was found that the primary phase of the Tb0.3Dy0.7(Fe0.9T0.1)1.95 alloys is the MgCu2.type cubic Laves phase structure for different substitution. The magnetostriction λs decrases greatly for the substitution of IIIA metal B, Al and Ga, but is saturated more easily for Al and Ga substitution, showing that the Al and Ga substitution is beneficial to a decrease in the magnetocrystalline anisotropy of Tb0.3Dy0.7(Fe0.9T0.1)1.95 alloys. However, the substitution of transition metal Mn and Co decreases slightly the magnetostriction λs. It was also found that the effect of different substitutions on the spontaneous magnetostriction λ111 is distinct. The analysis of the M?ssbauer spectra indicates that the easy magnetization direction in the {110} plane deviates slightly from the main axis of symmetry for Al and Ga substitution, namely spin reorientation, but it does not change evidently for B, Mn and Co substitution.

关键词： magnetostriction cubic Laves phase spin reorientation M?ssbauer.

Orlicz序列空间的k-端点和k-强端点

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西南师范大学学报（自然科学版） 2004年第6期29卷 911-915页

作者：段丽芬崔云安通化师范学院数学系吉林通化134002 哈尔滨理工大学应用科学学院黑龙江哈尔滨150080

给出了赋Orlicz范数Orlicz序列空间中k端点和k强端点的充要条件,并据此得到了Orlicz序列空间k严格凸和中点局部k一致凸的判别条件.

关键词： Orlicz序列空间 k-端点 k-强端点赋Orlicz范数严格凸判别条件充要条件中点局部

Cloning and functional analysis of the sequences flanking mini-Tn5 in the magnetosomes deleted mutant NM4 of Magnetospirillum gryphiswaldense MSR-1

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Science china(Life Sciences) 2005年第6期48卷 574-584页

作者： LI Feng1,2. LI Ying1, JIANG Wei1, WANG Zhenfang1 & LI Jilun1 1. State Key Laboratory for Agro-biotechnology and Department of Microbiology, china Agricultural University, Beijing 100094, china 2. Department of Biology, Huaibei Coal Industry teachers’ college, Huaibei 2.5000, china 1. State Key Laboratory for Agro-biotechnology and Department of Microbiology China Agricultural University 100094 Beijing China 2. Department of Biology Huaibei Coal Industry Teachers’ College 235000 Huaibei China

A magnetosome deleted mutant NM4 of Magnetospirillum gryphiswaldense MSR-1 was generated by mini-Tn5 transposon mutagenesis, and a 5045-bp fragment flanking mini-Tn5 in NM4 was cloned by Anchored PCR. Sequencing analysis showed that this fragment involved six putative open reading frames (ORFs); the mini-Tn5 was inserted into ORF4. Functional complementary test indicated that the 5045-bp fragment was required for biosynthesis of mag-netosomes in M. gryphiswaldense MSR-1. The protein encoded by ORF4 had 2.% of identity with the chemotaxis protein CheYIII of Caulobacter crescentus CB15, and the protein encoded by ORF4 contained a conserved signal receiver domain that can receive the signal from the sensor partner of the bacterial two-component systems. It was suggested that the protein en-coded by ORF4 may take part in the signal transduction relating to biosynthesis of magneto-somes.

关键词： Magnetospirillum gryphiswaldense, magnetosome deleted mutant, gene cloning, functional analysis.

A COMPARATIVE STUDY ON THE CARTOGRAPHIC HISTORIES BETWEEN china AND THE WEST

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Journal of Geographical Sciences 1996年第2期6卷 89-96页

作者： Lu Huancheng (Department of Geography, Siping teachers’ college, Jilin 13600 People’s Republic of{2.) DeptGeog Siping Teachers' Coll Jilin 13600 China

Analysis of space shifting of geodetic center of china and the West,reveals that the china's geodetic center has been in coincidence with its political center. Furthermore the development of the maps in Europe was controlled by developmat of economy. Thereupon, maps in china and the West were developing in their own ways, and thus formed two different cartographic *** china has a splendid cartogrphic history, it has not yet got many great breakthroughs. The reasons are as follows : 1. The theory of round earth has never occupied the ruling place, instead, the theory of flat earth took the dominant position. Thus the geodetic frameworks of china are not scientific. 2. Owing to the trammels of the theory that china is the whole earth, the Chinese geodetic workers have been limited in china's area. 3. Exchange between the East and the Weat is too late. The Chinese geodetic workers took a long time to accept the West geodetic technology. on the contrary, the West has absorbed the geodetic technology and results of china. 4. china's anciat gcodotic workers usually stopped after getting a little knowledge of a subject. They should have made great breakthroughs in geodetic area. Nevertheless, they failed.

关键词： cartographic history theory of flat earth geodetic center