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Rare Metals 2002年第2期21卷 142-151页

作者： ZHANG JianMetallurgical engineering school.university of science and technology Beijing, Beijing 100083, china Metallurgical engineering school University of Science and Technology Beijing 北京 100083

Based on the phase diagrams, measured activities an the annexationprinciple, the calculating models of mass action concentrations forin-Pb-Ag and In-Bi-Sb ternary metallic melts have been *** results of calculation both agree with practice, and obey the lawof mass action, showing that the models formulated can reflect thestructural reality of the corresponding melts and the annexationprinciple is applicable to the them.

关键词： activity mass action concnetration th annexation principle In-PB-Ag

Influences of Sputtering Angles and Annealing Temperatures on the Magnetic and Magnetostrictive Performances of TbFe Films

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Journal of Materials science & technology 2005年第3期21卷 315-318页

作者： Hongchuan JIANG, Wanli ZHANG, Wenxu ZHANG, Shiqing YANG and Huaiwu ZHANG College of Microelectronics and Solid State electronics, university of electronic science and technology of china, chengdu 610054, china College of Microelectronics and Solid State electronics University of Electronic Science and Technology of China Chengdu 610054 China

To increase the low-field magnetostriction of TbFe films, the influences of sputtering angles and annealing temperatures on its magnetic and magnetostrictive performances were systematically investigated. With the change in sputtering angles from 90° to 15°, the in-plane magnetization of TbFe films, at 1600 kA·m-1 external field, is strongly increased. An enhancement in the in-plane magnetostrictive coefficient of the films at 40 kA·m-1 is also observed. A detection of magnetic domains by MFM (magnetic force microscopy) indicates that the easy magnetization direction shifts gradually from perpendicular to parallel to the film plane with decreasing sputtering angles. Annealing can enhance the magnetization and magnetostriction of the TbFe films. However, at too high annealing temperature, both the magnetization and magnetostriction of the TbFe films were suppressed to some extent.

关键词： TbFe films Oblique sputtering Annealing Magnetization Magnetostriction

Minimax-Type Inequalities for a Family of Functions with Applications

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Acta Mathematica Sinica,English Series 1997年第3期13卷 389-406页

作者： Jiang Jiahe (Department of Mathematics,university of electronic science and technology,chengdu 610054,china) Department of Mathematics University of Electronic Science and Technology

In the present paper there are given a number of minimax-type inequalities for a family of functions,involving two multivalued mappings,one being strongly decomposable and the other *** some applications to the variat... 详细信息

关键词： Minimax-type inequality Monotone mapping Strongly decomposable mapping

Genes for resistance to stripe rust on chromosome 2B and their application in wheat breeding

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Progress in Natural science:Materials International 2009年第1期19卷 9-15页

作者： Peigao Luo a,b,Xueyun Hu a,Huaiyu Zhang a,Zhenglong Ren a,b,a State Key Laboratory of Plant Breeding and Genetics,Sichuan Agriculture university,Ya’an,Sichuan 625014,china b school of Life science and technology,university of electronic science and technology of china,chengdu 610054,china [a]State Key Laboratory of Plant Breeding and Genetics Sichuan Agriculture University Ya’an Sichuan 625014 China [b]School of Life Science and Technology University of Electronic Science and Technology of China Chengdu 610054 China

Stripe rust,caused by Puccinia striiformis ***,is one of the most damaging diseases of wheat *** resistant cultivars is the most economic and environmental friendly way to control the *** are many resistance genes to stripe rust located on wheat chromosome ***,we propose a strategy to construct the recombinant wheat chromosome 2B with multiple resistances to stripe rust by making crosses between wheat lines or cultivars carrying Yr genes and using marker-assisted selection,based on the reported information about resistance spectrum,chromosomal location,and linked markers of the *** the resistance genes on 2B would afford a valuable strategy to control the disease by cultivating varieties with durable *** possibility,efficiency,and prospect of the suggested strategy are reviewed in the paper.

关键词： Puccinia striiformis Yr gene 2B chromosome Stripe rust Marker-assisted selection

Effect of heat treatment on the transformation behavior and temperature memory effect in TiNiCu wires

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Rare Metals 2009年第1期28卷 63-67页

作者： YU Huajun XIANG Xia Department of Applied Physics University of Electronic Science and Technology of China Chengdu 610054 China

The effect of heat treatment on the phase transformation behavior of TiNiCu shape memory alloy wires and the temperature memory effect in this alloy were investigated by the resistance method. These results showed that with increasing annealing temperature and annealing time, the phase transformation temperatures of TiNiCu wires were shifted to higher temperatures in the heating and cooling process. It was also found that incomplete thermal cycles, upon heating the TiNiCu wires, which were arrested at a temperature between the start and finish temperatures of the reverse martensite transformation, could induce a kinetic stop in the next complete thermal cycle. The kinetic stop temperature was closely related to the previous arrested temperature. This phenomenon was defined as the temperature memory effect. The result of this study was consistent with the previous report on the phenomenon obtained using the differential scanning calorimetry method, indicating that temperature memory effect was a common phenomenon in shape memory alloys.

关键词： TiNiCu shape memory alloy heat treatment phase transformation temperature temperature memory effect

Preparation of YBCO Coated Conductors on RABiTS Substrate with Advanced TFA-MOD Method

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稀有金属材料与工程 2011年第S3期40卷 342-345页

作者： Zhao Xiaohui, Gao Chang, Xia Yudong, Zhang Fei, Tao Bowan State Key Laboratory of electronic Thin Film and Integrated Devices,university of electronic science and technology of china, chengdu 610054, china Univ Elect Sci & Technol china State Key Lab Elect Thin Film & Integrated Device Chengdu 610054 Peoples R China

YBCO high temperature coated conductors are the most promising candidate for large scale superconducting transmission cables and fault current limiters. A modified TFA-MOD method was applied to prepare YBCO layer on Rolling Assisted Biaxially Textured Substrate (RABiTS) with textured Y 2 O 3 /YSZ/CeO 2 buffer layers, resulting in reduced time and cost of fabrication. By using Cu naphthenate instead of Cu(TFA) 2 , the pyrolysis time of the YBCO precursors was reduced significantly. YBCO films with thickness of 2 μm were fabricated with multiple-coating and annealed at high temperature for 2 h. X-ray diffraction analysis revealed that the films were c-axis oriented. The preliminary results of YBCO films yielded 0.2 MA/cm 2 at 77 K and self field. It is believed current carrying ability of YBCO films could be further improved by reducing the reaction rate at the interface between the buffer layer and superconducting layer.

关键词： TFA-MOD coated conductors RABiTS YBCO

A new satellite to satellite tracking algorithm from Doppler-shifted frequency measurements

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Progress in Natural science:Materials International 2007年第10期17卷 1226-1234页

作者： Li Qiang, Guo Fucheng and Zhou Yiyu(school of electronic science & engineering, National university of Defense technology, Changsha 410073, china) school of electronic science & engineering National University of Defense Technology Changsha 410073 China

A new satellite to satellite tracking (SST) algorithm from Doppler-shifted frequency measurements is proposed. The estimation principle is demonstrated and the mathematic model of SST is established. The state estimation methods for a user (the cooperative case) and target satellites (the non-cooperative case) are presented based on particle swarm optimization (PSO). The Cramer-Rao lower bounds (CRLB) are deduced as well. Performance of the new algorithm is validated through computer simulations, which proved that the proposed method is effective in terms of the estimation quality compared with CRLB and superior in accuracy to the Bearings-Only (BO) method in almost all simulation cases except for the case that an enough long tracking arc-length is obtained for a user satellite.

关键词： satellite to satellite tracking (SST) Doppler-shifted frequency (DSF) Space Surveillance Network (SSN) particle swarm optimization (PSO).

Magnetic and dielectric properties of low temperature fired ferrite/ceramic composite materials

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Progress in Natural science:Materials International 2011年第1期21卷 21-26页

作者： Wei-wei LING~(1,2),Huai-wu ZHANG~1,Ying HE~1,Yuan-xun LI~1,Yun-yan WANG~1 1.State Key Laboratory of electronic Thin Films and Integrated Devices, university of electronic science and technology of china,chengdu 610054,china 2.Department of Communication engineering,chengdu university of Information technology, chengdu 610225,china [a] State Key Laboratory of electronic Thin Films and Integrated Devices University of Electronic Science and Technology of China Chengdu 610054 China [b] Department of Communication engineering Chengdu University of Information Technology Chengdu 610225 China

Ni-Cu-Zn ferrite/CaTiO3and Ni-Cu-Zn ferrite/BaTiO3composites which can be applied in low temperature co-fired ceramic（LTCC） technology were synthesized by conventional solid-state reaction at temperature lower than 950℃.Influence of the microstructures and the gap parameterδ/D on the complex permeability of the above two composites was *** modifiedδ/D values of the above two composites show a good fit to the magnetic circuit *** dielectric properties of the composites were predicted by the Maxwell-Garnctt effective medium theory and the discrepancy between measured and calculated values was analyzed.

关键词： ferrite/ceramic composite low temperature co-fired ceramic(LTCC) solid-state reaction magnetic properties dielectric properties

Two Families of Liapunov Functions for Functional Differential Systems

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Acta Mathematica Sinica,English Series 1999年第2期15卷 197-206页

作者： Yi Zhang, Department of Computer science and engineering, university of electronic science and technology of china, chengdu 610054, P. R. chinaMeijuan Wang, Department of Basic Studies, East china university of technology, 516 Jungong Road Shanghai 200093, P. R. china Department of Computer science and engineering University of Electronic Science and Technology of China Chengdu P. R. China Department of Basic Studies East China University of Technology Shanghai P. R. China

Two families of Liapunov functions are employed to study the global stability and bound- edness of functional differential systems. New stability and boundedness theorems are obtained. Ap- plications of these theorems... 详细信息

关键词： Liapunov Function Razumikhin Technique Stability Infinite Delay

Influence of CaZrO_3 on dielectric properties and microstructures of BaTiO_3-based X8R ceramics

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science china(Technological sciences) 2008年第9期51卷 1451-1456页

作者： TANG Bin, ZHANG ShuRen, YUAN Ying, ZHOU XiaoHua & LIANG YiShuai State Key Laboratory of electronic Thin Films and Integrated Devices, university of electronic science and technology of china, chengdu 610054, china State Key Laboratory of electronic Thin Films and Integrated Devices University of Electronic Science and Technology of China Chengdu 610054 China

The influences of CaZrO3 on the dielectric properties and microstructures of BaTiO3 (BT)-based ceramics have been investigated. The experiment results showed that the dielectric constant at room temperature increased with the addition of CaZrO3 in the range of 0―3.0 mol%, which could be explained by the growth of BT grains. XRD analysis revealed that the tetragonality declined as CaZrO3 concentration in-creased. XRD patterns of BT ceramics with different amounts of CaZrO3 doping were analyzed by a recently developed procedure-materials analysis using diffrac-tion (MAUD), which was based on the Rietveld method combined with Fourier analysis. The results depicted that the high temperature peak of tempera-ture-capacitance characteristics (TCC) was largely dependent on the micro-strain of samples. Furthermore, more CaZrO3 doping resulted in lower porosity and higher density. It was revealed that proper usage of CaZrO3 could improve the di-electric properties significantly, which was benefit to develop X8R multi-layer ce-ramic capacitors.

关键词： dielectric properties barium titanate tetragonality temperature-capacitance characteristics calcium zirconate