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Chinese Journal of Lasers 2000年第2期9卷 175-181页

作者： GONG Jiamin FANG Qiang LIU Juan WANG Yongchang (Insitute of modern physics, {2.' an Jiaotang {2., {2.' an 710049, China Department of Telecommunications, {2.' an institute of Posts and Telecommunications, {2.' an 710061, China ) 西安交通大学陕西西安西安邮电学院陕西西安

The non-dispersion-limited analytic acutions of unidirectional N-channel transient stimulated Raman scattering (SRS) coupling wave equation which governing the propagation of the optical signals in single-mode (SM) silica fiber have been presented. Taking into account the SRS cross coupling among the N- channels, the analytic solutions are applicable to the system with arbitrary channel separation and input signal light power.

关键词： stimulated Raman scattering (SRS) wavelength division multiplexing (WDM) fused silica fiber Raman amplification Raman crosstalk

NEW MATERIALS OF DINOCROCUTA GIGANTEA FOUND IN FUGU COUNTY, SHAANxi PROVINCE

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古脊椎动物学报(中英文） 1996年第1期 25-26页

作者： Zhang Yunxiang Xue xiangxu(Department of Geology {2. of Cenozoic Geology and Environment northwest university xi'an {2.)

Dinocrocuta gigantea was erected by M. Schlosser in 1903. Since then, there were very few materials of Dinocrocuta gigantea to be found, and most of them unknown provenances. In 1986, a large quantity of Hipparion fauna fossils were yeilded in Laogaochuan, Fugu County, Shaanxi Province, among which, there are some materials of Dinocrocuta gigantea, including a complete skull, an anterior part of skull with all teeth, broken lower jaws, 10 isolate teeth, humerus and proximal part of ulna of same individual, femur etc.

关键词： Fugu Shaanxi Late Miocene Dinocrocuta gigantea

Compression behavior of Zr_(41)Ti_(14)Cu_(12.5)Ni_(10)Be_(2..5) bulk metallic glass up to 2. GPa

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Science China(physics,Mechanics & Astronomy) 2005年第3期48卷 319-324页

作者： LI Gong 1, 2., ZHAN Zaiji 2., LIU Jing 3 , YUN Jinku 1 , SUN Liling 2., LIU Riping 1 , ZHANG Jun 2.& WANG Wenkui 1, 2.1. Key Laboratory of Metastable Materials Science and Technology, Yanshan university, Qinhuangdao 066004, China 2. Center for Condensed Matter physics,{2. of physics, Chinese Academy of Sciences, Beijing 100080, China 3. BSRF,{2. of High Energy physics, Chinese Academy of Sciences, Beijing 100039, China Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao China Center for Condensed Matter physics Institute of Physics Chinese Academy of Sciences Beijing China BSRF Institute of High Energy Physics Chinese Academy of Sciences Beijing China

The compression of a Zr41Ti14Cu12.5Ni10Be2..5 bulk metallic glass (BMG) is investigated at room temperature up to 2. GPa using in-situ high pressure energy dispersive X-ray diffraction with a synchrotron radiation source. The pressure-induced structural relaxation is exhibited. It is found that below about 8 GPa, the existence of excess free volume contributes to the rapid structural relaxation, which gives rise to the rapid volumetric change, and the structural relaxation results in the structural stiffness under higher pressure.

关键词： bulk metallic glass, high pressure, structural relaxation, synchrotron radiation.

A Study of Multi-order Semidifferential Oscillographic Chronopotentiometry

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Chinese Chemical Letters 1998年第8期9卷 753-756页

作者： Jian Bin ZHENG Min GAO Ye Wei FU Hong GAO (H.KAO)(institute of Electroanalytical Chemistry, northwest university,{2.) Inst. of Electroanalytical Chemistry Northwest University Xi'an 710069 China

By applying the convolution technique to the treatment of oscillographic signal, a new electroanalytical method, 0.5-3.5 order differential A.C. oscillographic chronopotentiometry is presented. This note represents th... 详细信息

关键词： oscillographic analysis oscillographic chronopotentiometry multi-order semidifferential

Allocation of power generating and shipping of Hanjiang upstream cascade

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Progress in Natural Science:Materials International 2005年第8期15卷 733-741页

作者： LIU Junping1* and CHANG Mingqi 2.3(1. School of Civil Engineering and Architecture, Zhejiang university of Technology, Hangzhou 310014, China 2. institute of Water Resources & Hydroelectric Engineering, {2.'an university of Technology, {2.'an 710048, China 3. Shan{2. institute of Water Resources, Taiyuan 030001, China) School of Civil Engineering and Architecture Zhejiang University of Technology Hangzhou 310014 China institute of Water Resources and Hydroelectric Engineering Xi'an University of Technology Xi'an 710048 China Shanxi institute of Water Resources Taiyuan 030001 China

The optimal model and simulating model of the Hanjiang cascade reservoirs operation with one day as its calculating period are established to coordinate the contradictions between power generating and shipping. The optimal model is solved by progressive optimality algorithm method adopting the theory of large system decomposing and coordinating. By analyzing the water allocation results obtained from six schemes, which are two cascades, four cascades and seven cascades joint operation considering shipping or not, the contradiction degree between power generating and shipping is investigated and some joint operation schemes are proposed.

关键词： cascade power generating contradiction shipping optimal operation.

Thermochemistry on coordination behavior of samaric chloride hydrate with diethylammonium diethyldithiocarbamate

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Rare Metals 2004年第3期23卷 203-208页

作者： JIAOBaojuan RENYixia CHENSanping GAOShengli ZHAOFengqi SHIQizhen DepartmentofChemistry ShaanxiKeyLaboratoryofPhysico-InorganicChemistryNorthwestUniversityXi＇an710069China xi＇anModemChemistryResearchinstitute Xi＇an710072China DepartmentofChemistry ShaanxiKeyLaboratoryofPhysico-InorganicChemistryNorthwestUniversityXi＇an710069China

The complex of samaric chloride lower hydrate with diethylammoniumdiethyldithiocarbamate (D-DDC) was synthesized conveniently in absolute alcohol and dry N_2.tmosphere. The title complex was identified as Et_2.H_2.Sm(S_2.NEt_2._4] by chemical and elementalanalyses, the bonding characteristics of which was characterized by IR. The enthalpies of solutionof samaric chloride hydrate and D-DDC in absolute alcohol at 2.8.15 K and the enthalpies change ofliquid-phase reaction of formation for Et_2.H_2.Sm(S_2.NEt_2._4] at different temperatures weredetermined by mi-crocalorimetry. On the basis of experimental and calculated results, threethermodynamic parameters (the activation enthalpy, the activation entropy, and the activation freeenergy), the rate constant, and three kinetic parameters (the apparent activation energy, thepre-exponential constant, and the reaction order) of liquid phase reaction of formation wereobtained. The enthalpy change of the solid-phase title reaction at 2.8.15 K was calculated by athermochemical cycle.

关键词： inorganic chemistry thermochemistry microcalorimetric method samaricchloride hydrate diethylammonium diethyldithiocarbamate (D-DDC)

The size effect on transport properties of colossal magnetoresistance materials La_(0.67)Ca_(0.33)MnO_3

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Science China(physics,Mechanics & Astronomy) 2008年第3期51卷 251-257页

作者： LI PeiGang1,2.LEI Ming1,2.GUO YanFeng2.GUO xi2.CHEN LeiMing2. TANG WeiHua1,2.SONG PengYun3 & CHEN JinPing3 1 Department of physics,Center for Optoelectronics Materials and Devices,Zhejiang Sci-Tech {2.,Hangzhou 310018,China 2.National Laboratory for Condensed Matter physics,institute of physics,Chinese Academy of Sciences,Beijing 100080,China 3 Department of physics,Peking {2.,Beijing 100875,China Department of physics Center for Optoelectronics Materials and Devices Zhejiang Sci-Tech University Hangzhou China National Laboratory for Condensed Matter physics Institute of Physics Chinese Academy of Sciences Beijing China Department of physics Peking University Beijing China

High quality La0.67Ca0.33MnO3 (LCMO) film was deposited via a novel pulsed electron deposition technique on SrTiO3(100) single crystal substrate. The micro-bridge with different widths was fabricated by using electron beam lithography (EBL) technique and their transport properties were studied. For the micro-bridges with width of 2.and 1.5 μm,the insulator-to-metal transition temperature (TP) keeps un-changed compared with the film. For the micro-bridges with width of 1 μm,the TP shifts towards the lower temperature by 50 K. When the width decreases down to 500 nm,the insulator-to-metal transition disappears. The magnetoresistance be-havior of these micro-bridges was studied,and the results show that the low field magnetoresistance (LFMR) decreases and the high field magnetoresistances (HFMR) keep almost unchanged as the width of micro-bridge is reduced.

关键词： colossal magnetoresistance pulsed electron deposition electron beam lithography electrical transport properties

The Dilution/Crystallization Kinetics of RDX and HMX

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含能材料 2002年第3期10卷 100-103页

作者： HU Rongzu1, LI Zhibin2. CHEN xijün2. GAO Shengli1, FANG Yan1, SHI Qizhen1(1. Department of Chemistry, northwest university, xi′an 710069, China 2. xi′an {2. Chemistry Research institute, xi′an 710065, China) Department of Chemistry Northwest University Xi'an 710069 xi'an modern Chemistry Research {2. Xi'an 710065

Three thermokinetic equations describing the crystal growth process and two relationships between the parameters and the constants of the kinetic equations are derived. The thermokinetic data of crystal growth processes of RDX and HMX are treated based on the derived equations and relationships. The results show that the exothermic dilution / crystallization processes of RDX and HMX are the first order reaction and accord with the dislocation theory.

关键词：位错理论结晶动力学晶体生长

A paleontological perspective of vertebrate origin

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Chinese Science Bulletin 2003年第8期48卷 725-735页

作者： SHU Degan Early Life institute & Department of Geology, northwest university, {2.抋n, {2., China School of Earth Sciences and Resources, China university of Geosciences, Beijing, 100083, China (e-mail: elidgshu@ ***) Early Life institute Department of Geology Northwest University Xi'an 710069 China School of Earth Sciences and Resources China University of Geosciences Beijing 100083 China

The Early Cambrian Haikouichthys and Haikouella have been claimed to be related to contribute in an important way to our understanding of vertebrate origin, but there have been heated debates about how exactly they are to be interpreted. New discoveries of numerous speci-mens of Haikouichthys not only confirm the identity of pre-viously described structures such as the dorsal and the ven-tral fins, and chevron-shaped myomeres, but also reveal many new important characteristics, including sensory or-gans of the head (e.g. large eyes), and a prominent notochord with differentiated vertebral elements. This 揻irst fish?ap-pears, however, to retain primitive reproductive features of acraniates, suggesting that it is a stem-group craniates. A new order (Myllokunmingiida) and a new family (Myllo-kunmingiidae) are erected, and a new species, Zhongjianich-thys rostratus (gen. et sp. nov.), is described herein. Over 1400 newly-discovered specimens of Haikouella provide a wealth of anatomical information on this organism. It differs from chordates in many organs and organ systems, including the skin, muscles, respiratory, circulatory and nervous sys-tems. In contrast, its body-design resembles that of vetuli-colians, and the presence of a 搕ransitional?nervous system with both dorsal and ventral nerve cords suggests an affinity with living hemichordates. On the basis of these and other recent findings of fossil deuterostomes, a five-step hypothesis for vertebrate origin is proposed, intended to bridge the long- standing gap between protostomes and vertebrates. Four of the five steps accord with established ideas current in modern evolutionary zoology. Evidence for the first step is obtainable only from fossils, and specifically from fossils found from South China, hence the crucial importance of S. China sites for our understanding of early vertebrate origins and evolution. Accordingly, South China is suggested as the oldest-known birthplace of the whole vertebrates.

关键词：脊椎动物动物起源寒武纪中国南部地区

A high power MOPA free-electron laser with narrowline-width

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Nuclear Science and Techniques 1999年第3期10卷 165-167页

作者： SHU xiaojian (institute of {2. {2., Fudan university, Shanghai 2.0433 institute of Applied {2. and Computational Mathematics, Beijing 100088) 复旦大学物理系上海

A new kind of MOPA configuration to obtain a high power free-electron laser with very narrow line-width that can satisfy the requirements of some applications such as the laser isotope separation has been proposed, wh... 详细信息

关键词：自由电子激光器线宽窄功率大