ARC/VIEW中Shapefile数据结构剖析及格式转换

给出了一种同时读取Shapefile空间数据和属性数据的方法，即建立一个临时数据源，通过临时数据源动态的读取属性表，设计了将ARC／VIEW中Shapefile数据格式转换成用户自己的数据格式接口程序框图，并给出了利用C 读取Shapefile文件的实现方法。该方法通过S市某建设局GIS(Geography Information System)管理系统的验证，转换了1000多幅Shapefile格式的地图，转换结果准确率达98％。     

SPT图形文件转换成BMP图像文件的研究

本文剖析了SPT图形文件和BMP图像文件的数据格式 ,叙述了用高级语言直接将SPT图形文件转换成BMP图像文件的程序框图 ,介绍了研究过程和研究中遇到的问题及解决办法 ,实现了把SPT图形文件转换成BMP图像文件的愿望。这种方法为把已有的SPT图形文件转换成BMP图像文件或其它图形图像文件奠定了基础。     

图形文件DWG数据格式及信息传递

介绍了AutoCAD 2000 的图形(*.DWG) 数据格式,给出了作为工业标准的图形文件的组织结构,对组成DWG文件的头部、实体部、表部、块实体部和应急头部等5部分进行了说明,并陈述了利用C++读取DWG文件的数据结构和实现方法.     

图形文件几何参数的抽取技术

阐述了从图形文件抽取几何参数的技术，即把复杂的内部图形文件转换成外部可读的通用文件．通过对通用文件的结构分析，找出其内在的规律，然后用高级语言进行抽取和加工，将用户所需的几何参数写人数据文件，提供给用户读写，从而达到对图形数据管理的目标．     

图形文件DWG数据格式及信息传递

介绍了AutoCAD2000的图形(*．DWG)数据格式,给出了作为工业标准的图形文件的组织结构,对组成DWG文件的头部、实体部、表部、块实体部和应急头部等5部分进行了说明,并陈述了利用C 读取DWG文件的数据结构和实现方法。     

电离层TEC预报中同化编辑器的设计

通过对GPS观测及导航数据的分析．给出了用于电离层TEC预报的同化数据格式，并在此基础上用VC 实现了TEC同化编辑器．     

LCD显示屏的上位机软件设计

分析了图形点阵式LCD显示系统的上下位机组成结构.以VC为开发平台,设计了上位机软件系统,它由文件、编辑、转换、显示、通信、帮助等6部分组成,可实现文本/图形文件的读写、文件点阵信息的转换、显示及信息下传,并可针对不同控制对象将此系统进行相应移植.     

基于AutoCAD.NET的DWG与SHAPEFILE数据转换实现

在测绘工作中,绘图数据一般为DWG格式,而GIS建库项目一般采用Shapefile格式。本文基于AutoCAD.NET,实现了从DWG到Shapefile数据文件的快捷无损转换,在项目生产中具有实际意义与推广价值。     

用VC++实现工作流管理系统的建模设计

工作流自动化中，最核心的技术为流程自定义，为了设计一个图形化、可视化以及支持各种复杂流程的建模工具，详细介绍了用VC 进行面向对象的设计方法，用一系列已经封装好的模型元素在GUI方式下定义活动的属性和工作流的相关数据，并实现模型的图形文件和数据库文件的保存与读取。应用程序通过ADO与关系数据库SQL相连从而实现流程的定义，给出了部分实现例图。可以实现模型与代码之间的相互转化，并可以随时更新，得到高效率的办公自动化。     

数据采集系统中数据获取的C++Builder实现

数据采集系统需要PC机与现场数据采集仪器进行控制、监测与数据交换，经常要对计算机的端口进行读写操作．这里主要研究了在Borland C Builder环境下如何嵌套汇编语言实现对端口的读写，从而实时获取数据，达到了很好的效果，并在相应的实例中进行了详细的探讨．     

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     

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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