高精度激光——CCD在TP线径检测仪中的应用

激光检测技术在工业生产中得到了越来越广泛的应用，本文针对ＴＰ系列高精度线径检测仪的分析，讨论了为实现快速、非接触、高精度外径检测所需进行的系统设计和实现方法。文中重点讨论了ＣＣＤ光电转换系统的设计，提出了高频脉冲填充法处理和采集ＣＣＤ的输出信号，克服了ＣＣＤ器件本身的局限性，从而提高了系统整体分辩率和检测精度。     

箱体类零件同轴多层孔并行设计的评价算法

针对集成制造环境的复杂箱体类零件，研究出一种径差数列算法，实现了ＣＡＰＰ对ＣＡＤ设计结果的早期评价，为并行工程实施的自动化环境提供了一种方法。     

DS／CDMA长码系统在多径衰落环境下的性能分析

本文以高斯近似的方法，对ＤＳ／ＣＤＭＡ长码在Ｒａｙｌｅｉｇｈ衰落多径环境下的性能进行了分析，得出了误码下限，并讨论了扩频增益与多址、多径的关系。     

非接触式电荷藕合测径仪的研制

本文就ＣＣＤ测径仪的结构与测量原理做了概括性的论述，并介绍通用的线阵ＣＣＤ高精度检测电路及提高测试精度的关键性技术。     

路径相关抗多径多用户检测器

提出了一种新的抗多径多用户检测器,该检测器能有效地实现多径分集。为简化异步多用户检测,作者曾提出过一种新的异步直扩码分多址（ＤＳ－ＣＤＭＡ）系统,即无记忆ＤＳ－ＣＤＭＡ系统,并对该系统在单用户多径情况下的性能以及几种新的抗多径检测器（单用户）进行了研究。同时考虑了多径干扰和多址干扰的影响。利用同一用户的多径信号间的强相关特性,并进行简化,将在实现路径分集的同时抑制多址干扰的影响并降低运算复杂度。虽然简化会带来附加的干扰项,理论分析和计算机仿真都表明,该路径相关多用户检测器（ＰＣＭＵＤ）具有比传统的ＲＡＫＥ接收机好得多的抗多径多址干扰性能。另外,该检测器具有很小的复杂度,能很好地工作在总的路径数超过扩频增益时。     

CCD信号的高速A／D转换及数据采集系统

研制了一个可以对ＣＣＤ信号实现高速数据采集的系统，该系统由８０３１单片机控制，采用频率可调的ＣＣＤ驱动电路、高速视频Ａ／Ｄ转换器以及总线隔离技术，实现对ＣＣＤ信号的数据采集和处理，该系统不同于ＤＭＡ系统，结构简单、价格便宜、适用范围广。     

码分多址个人通信系统抗多径干扰技术的研究

码分多址个人通信系统（ＣＤＭＡ－ＰＣＮ）中抗多径干扰技术的研究具有重要的意义。在ＣＤＭＡ系统中采用多径分集（ＲＡＫＥ）接收是抗多径干扰的一种有效方法，即通过相关解扩技术进行多径分离，再根据某种准则组合，达到改善抗干扰特性的目的。在对几种ＲＡＫＥ接收方案进行分析的基础上提出的以导引信号为探测信号的自适应多径分集接收（ＡＲＤＰ）实验系统的设计方案，经实验验证具有可行性。     

光纤线径无接触测量及其计算机图像处理方法

扼要介绍了采用光衍射方法,通过ＣＣＤ摄像实现无接触测量光纤等细丝线径的原理和实验过程,着重叙述了用计算机进行图像处理的方法和技巧。     

系统集成中ODBC技术的应用

论述了系统集成的必要性，并介绍了Ｃ／Ｓ结构的特点，说明采用Ｃ／Ｓ结构实现系统集成的优越性，讨论了在Ｃ／Ｓ结构下采用ＯＤＢＣ技术实现数据共享的必然性，同时对ＯＤＢＣ作了简单的介绍，最后探讨了在系统集成中的ＯＤＢＣ的应用。     

Windows环境CAD系统的开发与应用

本文介绍了一个Ｗｉｎｄｏｗｓ环境下的ＣＡＤ系统以及在Ｗｉｎｄｏｗｓ环境下使用该系统的方法。构造该系统，使用ＡｕｔｏＣＡＤ９．３０版，外挂矢量汉字，对ＡｕｔｏＣＡＤ进行了二次开发，建立了大量用户图块；用ＡｕｔｏＬｉｓｐ语言，编制了实用功能程序。利用窗口环境下多次执行ＡｕｔｏＣＡＤ的方法，实现了同时绘制编辑多张图纸，通过热键实现各图纸之间的快速切换；利用ＡｕｔｏＣＡＤ强大的图块功能，实现了图纸间的信息交换。     

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.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

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