CH83—25A型消振液压模锻锤自动控制系统的研制

采用先进的可编程序控制技术，在基本不改变原机的基础上，研制开发出ＣＨ８３－２５Ａ型肖振液压模锻锤的控制系统，实现了打击次娄航打击能量的预选、系统自动调控、油路阻塞实时报警、锤头回程缓冲、打击状态下自动保护等功能，具有程序控制自动打击、连续单步打击三种工作方式，扩大了机器的工艺范围，并显著提高了工作可靠性。     

基于图像分析的机场打击效果自动评估研究

根据机场这一典型目标的成像特点,将打击前后的机场图像配准,分别从打击前的机场图、配准图中分割出打击前、打击后的跑道,通过比较它们之间的变化,剔除伪弹坑,保留真实弹坑,再将完好跑道区域和真实弹坑合成一幅评估用图．自动评估时,以敌机起降所必需的最小起降窗口在此图中进行滑动,根据能否找到可供起降的区域来评估机场的打击效果．实验表明本方法在很大程度上实现了针对机场的打击效果评估的自动化与智能化、     

自动接头装置凸轮-连杆机构

介绍转杯纺纱机自动接头装置的工作原理，建立自动接头装置中凸舻连杆组合机构的运动学方程．重点阐述自动接头装置运动学、动力学分析模型的建立和仿真过程，对仿真结果进行后置处理，并分析机构的运动学特性，为进一步进行自动接头装置的研究工作提供了理论依据．     

可重构机器人工作空间的自动计算方法

由于可重构机器人的自由度和工作空间可以灵活定制，工作空间的自动计算是设计和校核中的一个重要问题．为此，讨论了基于旋量和Jacobian矩阵计算运动学逆解的通用方法、采用降维搜索和二分法计算工作空间边界点的计算方法以及采用双向链表确定工作空间多连域截面封闭曲线的算法．由此，工作空间的各个截面的形状、面积以及整个工作空间的形状、体积可以方便地确定，算法具有很好的通用性，实现了可重构串联机器人工作空间的自动计算．通过一个典型工业机器人的实例验证了算法的有效性．     

该升值但不可自由兑换

所谓“后危机时代”，目前最大的问题是国际贸易保护主义，中国的出口必定继续受到打击，正确的方法是在国内征收资源税，自动限制资源型产品出口，并提高劳动者收入，以结构．眭的财政和社会政策来提高出口商品的成本和价格，而不能屈从于美国的压力，把人民币过快地升值。     

政经

北方七省区协同打传 4月27日,北京、玉津、河北、山东、辽宁、山西、内蒙古等7个省、自治区、直辖市的工商行政管理部门．在天津联合签署了打击传销规范直销工作合作框架协议．希望以此构筑一个资源共享、信息互通、协作密切、优势互补的打击传销规范直销工作合作机制,维护社会和谐稳定。     

自动排课管理信息系统

课表编制工作是高等学校的一项重要而复杂的工作．本文以现代化科学管理方法为指导思想，开发了自动排课工作的计算机管理信息系统，从总体设计到各模块的功能、特点等进行了详细的介绍和理论探讨．     

基于Java语言的面向路径测试用例自动生成框架设计

软件测试是保证软件质量的重要手段，测试自动化是提高测试效率和测试质量的有效途径，测试用例自动生成是测试自动化的重要组成部分．为提高单元测试自动化程度，根据目前较先进的迭代松弛法，提出一个基于Java语言的面向路径测试用例自动生成框架，对该框架的主要思想、核心算法、主要模块及工作流程进行了阐述．该框架可以很好的为给定路径自动生成测试用例．     

行业

南方九省区工商部门联手打传 6月3日，广东、福建、江西、湖南、广西、海南、四川、贵州、云南等九省（区）工商部门，在广州签署了《九省（区）工商部门打击传销规范直销工作合作协议》及其《实施办法》。现有的打击传销模式通常是以省份为治理单位，各省份分别开展打击行动造成传销分子从一地流入另一地，使打击传销工作始终达不到良好效果。     

超声波测距仪在汽车安全系统中的应用

基于超声波测距的原理，利用单片机技术设计了一套系统，实现在行驶过程中一旦出现前后车距小于安全距离、对人车安全构成威胁时，车辆自动报警、自动刹车的功能，起到减少交通事故发生的目的．文章主要介绍基于AT89C51单片机的超声波测距系统，阐述了超声测距系统的硬件电路构成、工作原理及软件设计方法．     

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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