模拟HBT电流增益截止频率新方法

从半导体器件的基本方程出发，采用数值模拟方法，按照电流增益截止频率的定义，模似计算了ＡｌＧａＡｓ／ＧａＡｓＨＢＴ的ｆＴ，以及偏置电压和输入信号幅值对ｆＴ的影响，给出了电流放大系数随频变化的复平面图。     

Wistar大鼠血液生化值测定及性别和年龄对其影响的研究

用荷兰产ＩＳＰ半自动生化分析仪对不同性别四个年龄段的Ｗｉｓｔａｒ封闭群大鼠的１４项血液生化值进行了测定。和其他研究者的结果比较，该群大鼠具有较低的血液Ｈｂ、Ｔ．Ｂｉｌ、ＵＡ、Ｍｇ、ＴＧ值，较高的Ａｌｂ、Ｃｌ值。血液Ｃｒｅ、Ｃａ、Ｃｌ及４０－９０ｄ的ＴＰ值与人的正常值接近，ＢＵＮ、Ｐ、Ｍｇ、ＴＧ值高于人的数值。除Ｃａ、ＣＨＯ值不受年龄和性别影响外（Ｐ〉０．０５），Ｃｌ、Ｔ、Ｂｉｌ分别不受性别、年龄的     

HARMONIC AC SUSCEPTIBILITY FOR TEXTURED YBa_2Cu_3O_7

ＨＡＲＭＯＮＩＣＡＣＳＵＳＣＥＰＴＩＢＩＬＩＴＹＦＯＲＴＥＸＴＵＲＥＤＹＢａ２Ｃｕ３Ｏ７ＧｅＹｏｎｇ１）ＤｉｎｇＳｈｉＹｉｎｇ２）（１）ＤｅｐａｒｔｍｅｎｔｏｆＰｈｙｓｉｃｓ,ＮａｔｉｏｎａｌＬａｂｏｆＳｏｌｉｄＳｔａｔｅＭｉｃｒｏｓｔｒｕｃｔｕｒ...     

砷化镓场效应管的潜在性失效

为提高ＧａＡｓＭＥＳＦＥＴ静是放是失效阈值，通过ＥＳＤ实验前、后直流参数和热分布变化获取不足１０％的器件表面为永久性失效，而９０％以上的器件表现为潜在性失效的结果。潜在性失效机理类强电场、大电流及ｎｓ级瞬时冲击下，辅之以电热迁移和扩散，致使ＧａＡｓＭＥＳＦＥＴ肖特基势垒受到不同程度损伤，Ｇ－Ｓ、Ｇ－Ｄ间的界面离化或击穿。研究其潜在性失效机理，找出在设计、工艺和材料上的缺陷，以提高器件抗静电能力。     

CH3CSNH2／NH4OH钝化GaAs（100）表面的XPS表征

一种新的含硫化合物ＣＨ３ＣＳＮＨ２／ＮＨ４ＯＨ溶液被用来钝化ＧａＡｓ（１００）表面．应用Ｘ射线光电子谱（ＸＰＳ）表征了该钝化液处理的ＧａＡｓ（１００）表面的成键特性和电子态．结果表明，经过处理的ＧａＡｓ（１００）表面，能有效地消除Ｇａ和Ａｓ的氧化物，并且Ｓ既与Ａｓ成键也与Ｇａ成键，形成了Ｓ与ＧａＡｓ的新界面，这标志着ＣＨ３ＣＳＮＨ２／ＮＨ４ＯＨ溶液对ＧａＡｓ（１００）表面具有明显的钝化作用．钝化表面退火处理后，Ａｓ的硫化物不稳定，进一步与ＧａＡｓ衬底反应，生成稳定的ＧａＳ钝化层，此种钝化液可直接应用于半导体器件钝化工艺对ＧａＡｓ表面处理     

nSi／pSi1—xGex／nSi晶体管直流特性数值分析

采用一维有限差分方法,对生长在Ｓｉ（００１）衬底上的Ｓｉ１－ｘＧｅｘ应变基区异质结双极晶体管（ＨＢＴ）的直流特性进行了数值分析,给出了高斯掺杂情形下,基区中不同Ｇｅ分布的Ｓｉ１－ｘＧｅｘＨＢＴ的共射极电流放大系数图、Ｇｕｍ－ｍｅｌ图和平衡能带图;与Ｓｉ双极同质结晶体管（ＢＪＴ）的直流特性作了对比,结果表明基区中Ｇｅ的引入有效地改善了晶体管的直流性能;其次对基区中Ｇｅ分布与ｐ型杂质在基区－集电区交界处的不一致进行了模拟,证实了基区杂质向集电区扩散产生的寄生势垒使集电极电流密度下降这一实验结果．     

影响HEMT高频特性的因素分析

在已建立模型的基础上,分析了ＡｌＧａＡｓ／ＧａＡｓＨＥＭＴ的几个重要参数（栅长、栅宽、掺杂ＡｌＧａＡｓ的厚度、未掺杂ＡｌＧａＡｓ层的厚度、ＡｌＧａＡｓ层掺杂浓度、栅压、漏压）对其高频特性的影响。     

在p型GaAs材料上用快速退火形成Au／Zn／Au欧姆接触

在Ｍｇ注入形成的Ｐ型ＧａＡｓ材料上，用预热和快速两步退火方式形成ｐ型欧姆接触。用传输线方法（ＴＬＭ）测量比接触电阻，得到最佳值３．７３×１０＾－５Ω．ｃｍ＾２，用在ＡｌＧａＡｓ／ＧａＡｓＨＢＴ器件上，性能良好。     

鸭乙肝病毒表面抗原特异性单抗的研制及应用

以纯化的鸭乙型肝炎病毒表面抗原（ＤＨＢｓＡｇ）免疫ＢＡＬＢ／ｃ小鼠,取免疫鼠脾细胞与小鼠骨髓瘤ＳＰ２／Ｏ－Ａｇ１４融合,应用ＥＬＩＳＡ筛选出５Ｂ８和８Ｇ１１ ２株抗体分泌滴度较高的杂交瘤细胞,二者所分泌的单抗仅与ＤＨＢｓＡｇ发生反应,而与其它９种禽类常见的病毒均不发生反应,其亚类鉴定分别属于ＩｇＭ和ＩｇＧ２ａ。用鸭乙型肝炎病毒（ＤＨＢＶ）阳性鸭血清中粗提的病毒悬液进行５Ｂ８株单抗介导的ＳＰＡ胶体金     

CONTENTS LIST OF JOURNAL OF TIAN JIN UNIVERSITY 2 0 0 2

Ｎｏ.1ＡＳｕｂｄｉｖｉｓｉｏｎＭｅｔｈｏｄｗｉｔｈＨｉｇｈＲｅｓｏｌｕｔｉｏｎａｎｄＨｉｇｈＲｅｓｐｏｎｓｅＳｐｅｅｄｉｎＧｒａｔｉｎｇ ＢａｓｅｄＮａｎｏｍｅｔｒｏｌｏｇｙ　ＹＵＷｅｎ ｘｉｎ ,ＨＵＸｉａｏ ｔａｎｇ,ＺＯＵＺｉ ｑｉａｎｇ(1 )……………………………………………………………………ＫｉｎｅｍａｔｉｃｓＭｏｄｅｌｓａｎｄＤｅｖｅｌｏｐｍｅｎｔｏｆＣｏｎｔｒｏｌＳｙｓｔｅｍｏｆＳｐｈｅｒｉｃａｌＰａｒａｌｌｅｌＭａｎｉｐｕｌａｔｏｒ　ＷＡＮＧＹａｎｇ,ＮＩＹａｎ ｂｉｎｇ,ＨＵＡＮＧＴｉａｎ…     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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