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Science china(Technological Sciences) 2007年第2期50卷 184-189页

作者： CUI ChunXiang, ZHANG Ying, SUN JiBing & WANG Ru school of Materials Science and Engineering, Hebei university of Technology, Tianjin 300130, {2. 1. school of Materials Science and Engineering Hebei University of Technology Tianjin 300130 China

Sm3(Fe,Ti)2.Nx/α-Fe dual-phase nanometer magnetic material was fabricated through rapid solidification, crystallization and nitridation of Sm-Fe (Ti) alloy. The effect of combination of rapid solidification and Ti alloy addition on the phase for- mation and microstructure of the Sm-Fe alloy is investigated in this paper. The mi- crostructure of amorphous phase and dual-phase nano-grain crystals before and after crystallization annealing were observed using a high-resolution transmission electron microscope (HREM). The dual-phase nano-grains after annealing were compacted together with a clear interface with the direct exchange-coupling mechanism. Different annealing processes were used to examine the melt-spun alloy. Comparison of the images of SEM showed that annealing at 750 ℃ for 10 min was most suitable to get homogeneous and nano-grains. No obvious kink was de- tected in the second quadrant of the hysteresis loop like a single hard magnet, and strong exchange coupling was found between hard magnets and soft magnets.

关键词： rapid solidification microstructure Sm3(Fe Ti)2.Nx/α-Fe dual phase nanocomposite exchange-coupling

Analysis and simulation of high strain compression of anisotropic open-cell elastic foams

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Science china(Technological Sciences) 2010年第3期53卷 863-869页

作者： LU ZiXing,HUANG JiXiang&CHEN Xin school of Aeronautic Science and Engineering,Beijing university of Aeronautics and Astronautics,Beijing 100191,{2. 1. school of Aeronautic Science and Engineering Beijing University of Aeronautics and Astronautics Beijing 100191 China

By elongating the regular Kelvin model in one direction and keeping unchanged in the other two directions,the anisotropic model was ***,the simplified periodic structural cell was obtained according to the periodicity and symmetry of the model in the whole *** the half-strut element and elastic deflection theory to analyze the mechanical behavior as were adopted in the previous studies,this paper obtained the theoretical expressions for the compressive stress and strain as well as the corresponding curves in the rise and transverse *** addition,the theoretical results were examined by the finite element *** indicated that the theoretical analysis was very close to the finite element simulation when the strain was not too high,which confirmed the validity of theoretical *** the same time,the anisotropy was shown to have a significant effect on the mechanical properties of open-cell *** the anisotropy ratio increased,the compressive stress was improved in the rise direction but dropped in the transverse direction under the same strain.

关键词： open-cell foams elastic deformation Kelvin model anisotropy finite element

REGULARITIES AND SINGULARITIES OF THE ENERGY MINIMIZERS OF THE HEISENBERG GROUP TARGETS

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Acta Mathematica Scientia 2003年第4期23卷 447-452页

作者：贾高 school of Science Nanjing University of Science and Technology Nanjing 210094 China Department of Mathematics Bengbu Tank Institute Bengbu 233013 China

In this paper, the properties of the maps for the Heisenberg group targets are studied. For u e∈W1,α(Ω, Hm), some Poincare type inequalities are proved. For the energy minimizers, the ∈-regularity theorems and the... 详细信息

关键词： Heisenberg group energy minimizer Legendrian map regularity singularity

Research on Key-Based Trust Model

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Research on Key-Based Trust Model

A novel mutation at the JK locus causing Jknull phenotype in a Chinese family

2.12.理创新、智能科技与经济发展研讨会

作者： Jianjun WANG 12.Jianping LI 1,Yongfan LI 2.Jing PENG 2.1 school of computer Science,{2. of Electronic Science and Technology of china,Chengdu Sichuan 610054,china 2.Information Science and Technology Department,HuNan First Normal {2.,Changsha Hunan 410002.china

In the distributed environments,Anonymous Access and Delegation are not satisfied in the traditional Access ***,they can be guaranteed in the Key-based Trust Models,because a key represents the identification of one user,both authorization and key are associated with each *** the Key-based Trust Models,the most representative ones are PolicyMaker、SPKI/SDSI and *** this paper,we extract the mechanisms of authorization from these models;discuss the advantages and disadvantages,so as to develop new studies and applications.

关键词： Key Trust Model Anonymous Access Authorization Delegation

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Science china(Life Sciences) 2005年第6期48卷 636-640页

作者： MENG Yan1, ZHOU Xueyan2. LI Yang1, ZHAO Dan1, LIANG Shuyuan2. ZHAO Xuejian1, YANG Baoxue1,3 1. Department of Pathophysiology, school of Medical Science, Jilin university, Changchun 13002., {2. 2. The Third Hospital of Jilin university, Changchun 130031, {2. 3. Departments of Medicine, university of California, San Francisco, CA, 94143-052., USA 1. Department of Pathophysiology School of Medical Science Jilin University 130021 Changchun China 2. The Third Hospital of Jilin university 130031 Changchun China 3. Departments of Medicine University of California 94143-0521 San Francisco CA USA

Urea transporters are a group of proteins that facilitate urea movement across biological membranes. Kidd blood group (JK antigen) and urea transporter of human erythrocytes are carried by the same protein UT-B. To investigate the molecular basis of the Jknull phenotype in the Chinese population, blood samples from Chinese individuals were screened using the 2.mol/L urea solution hemolysis test. Urea and water permeability of erythrocytes membrane was measured by stopped-flow light scattering. Genomic DNA was extracted from lymphocytes. UT-B gene of Jknull's family was analyzed using genomic PCR by primers designed to cover sequences of all exons and exon-intron boundaries in human UT-B gene. One Jknull subject was found from twenty thousand screened Chinese individuals, and it was confirmed that this individual did not express the erythrocyte urea transporter. Genomic sequence analysis of the Jknull individual showed that there were two point mutations, G→C, which is novel, and G→A, at the 3(-acceptor splice site (AG) of intron 5 of UT-B gene. Exon 6 is spliced out in the UT-B transcript due to either of these mutations. Water permeability in Jknull erythrocytes (Pf, ~0.00037 cm/s) was significantly lower than that in normal erythrocytes (Pf, ~0.00062.cm/s) after HgCl2.incubation, providing evidence for UT-B facilitated water transport in human erythrocytes.

关键词： urea transporter JK antigen urea erythrocyte water permeability.

中国古代治河思想──朴素唯物主义应用于实践的典范

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武汉大学学报(人文科学版) 2001年第1期54卷 14-19页

作者：李云峰武汉大学水利电力学院湖北　武汉　4.0072

中国古代治河思想是中国古代朴素唯物主义应用于实践的典范。中国古代治河思想主张“其尽人事，不诿天数”，在顺其水性的基础上重视主体的作用；提出从动态上把握河流，黄淮运统筹治理，全面规划；重视钻研治河理论，注重实践，这在中... 详细信息

中国古代治河思想是中国古代朴素唯物主义应用于实践的典范。中国古代治河思想主张“其尽人事，不诿天数”，在顺其水性的基础上重视主体的作用；提出从动态上把握河流，黄淮运统筹治理，全面规划；重视钻研治河理论，注重实践，这在中国思想史、科技史上都是独树一帜的。中国古代治河思想中关于水的哲学思考，无论是深度，还是广度，都是对其他自然现象研究所不能比拟的。

关键词：中国古代治河思想

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支持向量机在语音激活检测中的应用研究

通信学报 2003年第3期24卷 70-77页

作者：董恩清赵鹤鸣周亚同张晓娣苏州大学电子信息学院西安交通大学电子与信息工程学院陕西西安710049 西安交通大学电子与信息工程学院 Alberta大学电子与计算机工程系

提出将支持向量机(SVM)方法应用于语音激活检测(VAD),并验证SVM方法在VAD检测中的有效性。采用了快速训练支持向量机的序列最小最优化方法(SMO)进行训练。提出的基于SVM的VAD方法仍然采用G.72.附件B(G.72.B)中的VAD方法所采用的特征参... 详细信息

提出将支持向量机(SVM)方法应用于语音激活检测(VAD),并验证SVM方法在VAD检测中的有效性。采用了快速训练支持向量机的序列最小最优化方法(SMO)进行训练。提出的基于SVM的VAD方法仍然采用G.72.附件B(G.72.B)中的VAD方法所采用的特征参数作为分类的特征参数。经过基于SVM的VAD方法与G.72.B的VAD方法进行比较,表明SVM方法应用于VAD中是有效的。

关键词：支持向量机模式识别统计学习理论语音激活检测语音编码

Design and Realization of Fire Alarm System Based on CAN Bus

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Design and Realization of Fire Alarm System Based on CAN Bus

SOLUTION OF THE ENSO DELAYED OSCILLATOR WITH HOMOTOPY ANALYSIS METHOD

2.07 8th International Conference on Electronic Measurement & Instruments（ICEMI’2.07）

作者： Chen Yueping~1 Gan Fangcheng~2.Zhang Yongxian~2.(1 Department of Mechnical Engineering Guangxi university of Technology Liuzhou 545005 china) (2.{2. of Electrical and Electronic Engineering East china Jiaotong university Nanchang 330013 china)

＜正＞CAN bus is one kind of serial communication bus which support distributed control and real time control *** this paper,an intelligent fire alarm system based on CAN fieldbus technology and multi-single-chip-computer communication system is ***（controller area network ） is a fast serial bus that is designed to provide an efficient,reliable and economical link between fire detect sensors and fire control actuator,some intelligent algorithm or methods are adopted in the system to solve these problems, which miss alarm and error alarm are two difficult problems in the current fire alarm *** use of the new technology of CAN fieldbus and single-chip-computer technology,Hardware circuit and software design for intelligent node SJA1000 based on CAN and fire detector are *** designs of structure for network,parameter assignments for network and communication protocols are described in detail.

关键词： CAN bus fire alarm system computer control system fire detection intelligent nodes multi-sensor

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Journal of Hydrodynamics 2009年第1期21卷 131-135页

作者： WU Zi-ku school of Science Qingdao Agriculture University Qingdao 266109 China

An ENSO delayed oscillator is considered. The E1 Nino atmospheric physics oscillation is an abnormal phenomenon involved in the tropical Pacific ocean-atmosphere interactions. The conceptual oscillator model should consider the variations of both the eastern and western Pacific anomaly patterns. Using the homotopy analysis method, the approximate expansions of the solution of corresponding problem are constructed. The method is based on a continuous variation from an initial trial to the exact solution. A Maclaurin series expansion provides a successive approximation of the solution through repeated application of a differential operator with the initial trial as the first term. This approach does not require the use of perturbation parameters and the solution series converges rapidly with the number of terms. Comparing the approximate analytical solution by homotopy analysis method with the exact solution, we can find that the homotopy analysis method is valid for solving the strong nonlinear ENSO delayed oscillator model.

关键词： ENSO delayed oscillator homotopy analysis method strong nonlinear

Texture Analysis of Superconducting Films Based on YBCO System

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International Journal of Minerals,Metallurgy and Materials 2000年第2期14卷 107-109页

作者： Nan Chen Weimin Mao(Material Science and Engineering school, university of Science and Technol0gy Beijing, Beijing 100083 {2.)(Department of Materials Science and Engineering, university of Petroleum, Beijing 102.00, {2.) Material Science and Engineering school University of Science and Technology Beijing Beijing 100083 China Department of Materials Science and Engineering University of Petroleum Beijing 102200 China

Textures in different layers of superconductors based on YBCO system are analyzed using the methods of pole figure and con-ventional φ scans. It is shown that the φ scanning technology has only 1-dimensional description and could omit some information of3-dimensional orientaion distribution, which will influence the superconductor quality The pole figure method, in contrast, demonstra-tes the orientation distribution 2.dimensionally and gives a comprehensive view of thin filIn textUr, which is a much bettCr method fortexture analysis in superconducting films, in which there is commonly an unique high sharpness textur component.

关键词： superconductor thin film texture YBCO pole figure