以C8051F021单片机为控制核心的USB Host系统研究与开发

分析了嵌入式系统中USB主机控制器的设计与宴现，介绍了以C8051F021控制器芯片为控制核心的USB主机系统的硬件连接及软件体系结构，给出了MassStorage类协议程序设计和FAT文件系统软件设计．该系统把USB主机引入到嵌入式系统中，拓展了USB的应用领域．通过试验，该试验板成功实现了嵌入式系统中优盘的使用．     

某飞行器遥测系统固态存储器及其地面检测系统设计

论述了用于某飞行器遥测系统的固态存储器及其地面检测系统的设计思想、技术方案和工作原理，并给出了部分实弹试验结果．实弹试验结果表明，该系统设计方案合理、抗干扰性能强，操作简便．     

国产化超临界CO_2萃取试验装备的研制

充分吸取工业先进国超临界CO2萃取试验装备的优点，优化设计了国产化试验装备系统的总体方案．该系统采用隔膜压缩机产生高压CO2，可以对压力、温度及CO2流量等工艺参数实行独立测量与调控，既可常压分离又可带压分离．使用表明，该装备运行良好，总体性能与进口装备相当，并有所创新．     

酮苯脱蜡中试装置和试验

建立了一套酮苯脱蜡连续化中试装置，该装置吸收并采纳了工业实际情况．包括结晶系统、过滤系统、溶剂回收系统、冷冻系统以及仪表显示和控制系统．运用该装置对阿曼减三和阿曼减四精制油进行脱蜡试验研究，探讨脱蜡过程中溶剂加入位置、溶剂混合比和溶剂／油料稀释比对脱蜡效果的影响．试验结果表明．所建立的装置运行平稳．所获得的石蜡晶体以片状为主．所得到的脱蜡油的倾点和收率数据具有规律性和合理性．该研究工作为进一步利用该套装置对油料脱蜡进行系统研究以指导工业生产奠定了基础。     

有通信冲突的异构系统上的任务调度

在新的系统模型上，提出了一个任务调度算法．该系统模型考虑了通信冲突，即在任何时刻，一个处理器只能接收一条消息，发送一条消息．新的算法包括异构系统中任务优先级的高效排序和基于任务复制的处理器分配两部分．随机产生的任务图和一个具体应用的任务图进行调度试验的结果表明，该算法比已有调度算法的性能有了显著的提高．     

模态试验分析系统的实现及其关键技术

针对加固非击打式打印机动态特性的分析，介绍了一套自行开发的模态试验及数据处理系统，分析了实现该系统的关键技术：采样的频混和基带分析、选带分析、平均技术及冲击响应信号的提取等．该系统对激光印字机进行模态试验获得了满意效果．     

气敏元件性能测试装置的研制

介绍了一种能测试气敏元件性能的装置．该装置集试验箱体、检测系统为一体，功能齐全，使用方便，为新产品开发提供了可靠的数据．本文主要对测试装置的结构、工作原理、检测系统进行了论述     

流域防洪信息系统的研究——以东南沿海浦阳江流域为例

在分析了防洪工作的内容及决策过程的基础上，探讨了防洪信息系统的组成、结构及其建立方法．详细分析了系统的文本库、数据库、方法库、模型库以及它们之间的关系．最后以东南沿海浦阳江流域为试验流域，研制了该流域的防洪信息系统，并对该系统进行了应用示范     

车载GPS/DR组合导航系统的研究及其滤波算法

给出了基于ＧＰＳ与ＤＲ组合的车辆导航系统的设计，建立了该系统的数学模型，利用卡尔曼滤波器对各子系统进行滤波处理，最后对系统进行信息综合及传感器误差校正．试验结果表明，该系统具有良好的导航与定位性能     

基于CPLD的线路编解码器的设计与实现

介绍了水下潜器三维图像数字传输系统线路编解码器设计原理．该设计采用了586B线路码型，其核心电路用可编程逻辑器件CPLD实现．介绍了电路设计原理以及系统实验．通过试验验证了方案的可行性和先进性．系统误码率满足设计要求．     

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