CdSe单晶体的生长及其特性研究

本文报道了用改进的垂直气相法(多级提纯垂直气相法)生长富Cd的CdSe单晶体,并对晶体的性能进行了观测,其电阻率为107Ωcm量级,电子陷阱浓度为108cm-3量级,第一次报道了(110)面的腐蚀形貌。结果表明：采用这种方法制备CdSe单晶,设备简单,易于操作,在提纯和生长过程中不需要转移原料,有利于减少晶体中的杂质含量,降低位错密度,改善晶体的电学性能。多级提纯垂直气相法是一种有前途的CdSe单晶体生长的新方法。     

THE TEMPERATURE ANALYSIS OF THE BILLET WITH PHASE CHANGE DURING CONTINUOUS CASTING

ＴＨＥＴＥＭＰＥＲＡＴＵＲＥＡＮＡＬＹＳＩＳＯＦＴＨＥＢＩＬＬＥＴＷＩＴＨＰＨＡＳＥＣＨＡＮＧＥＤＵＲＩＮＧＣＯＮＴＩＮＵＯＵＳＣＡＳＴＩＮＧＺｈａｏＸｉｎｇ－ｈｕａ（赵兴华）,ＣｈｅｎｇＸｉａｏ－ｄｉ（陈小弟）（ＳｈａｎｇｈａｉＵｎｉｖｅｒｓｉｔｙ...     

具有抛物线边界的各向异性体的二维变形问题

文章通过Lekhnitskii方法及映射函数法系统地研究了具有抛物线边界的各向异性体的二维变形问题,并利用所获得的结果研究了一种特殊的结构--半无限裂纹问题,求得了裂纹尖端的应力奇异场及应力强度因子。     

Effect of Caffeic acid on the Tumor Cells U937 Evaluated by an Electrochemical Voltammetric Method

Catl'eicacidisoneofthemajorpolyphenolcompoundsfoundinnumerousplantspecies.t'llbicbcallbeaccumulatedto29/Oinhumandailydieti.Itiswidelyrecognizedtobedlllioxidallt.whichcallscavengereactivespeciesofoxygenandnitrogen?.itsantimutagenecit}hasalsobeenevaluatedbySa/l}]()}7el/atjphi)]lllrllll)Isystem'.however.thereisnorepoltofthischemical'sdirecteft'ectontumorcells.Recently,asakindofnon-morpllologicalobservationmethod,electrochemicalmethodhasbeendevelopedforfollowingcellhealthstates#andevaluatingeffec…     

ON THE EXTREMAL PROPERTIES OF OPEN COMPOSITE TRAPEZOIDAL FORMULAE

It is found that the open composite trapezoidal formulae are the best quadrature formulae under three different senses.     

Calix[4]dithiacrown-6 and Its Platinum Complex

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Curve cracks lying along a parabolic curve in anisotropic body

ＣＵＲＶＥＣＲＡＣＫＳＬＹＩＮＧＡＬＯＮＧＡＰＡＲＡＢＯＬＩＣＣＵＲＶＥＩＮＡＮＩＳＯＴＲＯＰＩＣＢＯＤＹＨｕＹｕａｎ－ｔａｉ（胡元太）ＺｈａｏＸｉｎｇ－ｈｕａ（赵兴华）（ＳｈａｎｇｈａｉＵｎｉｖｅｒｓｉｔｙ;ＳｈａｎｇｈａｉＩｎｓｔｉｔｕｔｅｏｆＡ...     

基于可调谐二极管激光吸收光谱遥测CH4浓度

文章对可调谐二极管激光的直接吸收和波长调制光谱进行了理论分析,设计了一套用于研究甲烷吸收特性的测量系统.近红外二极管激光工作在室温下,选用波长为1.65 μm,利用甲烷的2v3带R(3)线实现对甲烷气体的吸收测量,对测量的信噪比和系统的基本噪声源进行了分析,为实现甲烷浓度的在线遥测打下基础.     

复平面上正多边形的判定及应用

结合教学给出复平面上n个点成为正多边形的条件,最后讨论它的一些应用.     

A controller for 97 MHz super-conducting QWR for NSC LINAC booster

A resonator controller has been implemented to stabilize the amplitude and phase of rf fields in the super-conducting resonators of NSC LINAC. Due to reduced losses these resonators have intrinsic band width of the order of 0.1 Hz at 97 MHz whereas the vibration-induced center frequency changes are of the order of a few tens of hertz. In the control strategy followed, the resonator is made the frequency selective part of an oscillator. The phase lock is achieved by dynamically adding a phase shift in the oscillator. A slow tuner minimizes the slow drifts in the resonator center frequency. In this paper we present the control strategy, implementation details and performance obtained with this controller.