面向对象技术在采矿CAD软件开发中的应用

以矿井交岔点ＣＡＤ软件的开发为例，阐述如何利用面向对象思想对采矿ＣＡＤ软件开发进行系统分析和设计，从而为采矿ＣＡＤ软件的开发提出了一个新的思路和方法，以提高软件的设计和质量。     

采矿CAD中的基本图素集研究

基本图素集是采矿ＣＡＤ中的一项关键技术。本文综合运用ＣＡＤ技术、计算机图形学，结合传统采矿工程设计的特点，提出了采矿ＣＡＤ系统的基本图素集构造原则及基本因素集。对基本图素集中每种因素的描述方法、组织方式、适应性等进行了全面的讨论。     

采矿CAD层次模型及对象分析

对煤炭行业的采矿ＣＡＤ应用和开发现状进行了研究和分析。提出了采矿ＣＡＤ的层次模型，及其对象树和复合对象的构成和部分对象的属性，并对对象树管理器基本功能作了初步的探讨。     

形位公差图样标注的计算机辅助设计

基于图形的ＣＡＤ与数控的ＣＡＤ，以及两者之间衔接过程ＣＡＰ实现方面的研究思想，采用ＡｕｔｏＬＩＳＰ开发语言，在ＡｕｔｏＣＡＤ环境中，开发了国标形位公差的自动标注以及形位公差数据库的维护等功能，有效地实现了机械零件设计中国标形位公差１４类２５种形式的自动标注，该系统界面友好，使用方便。     

矿井设计CAD中的采矿图素库

在汉化的ＡｕｔｏＣＡＤ系统基础上,用计算机绘制采矿工程图是一条方便而有效的途径。探讨井田开拓和采区巷道布置图的程序化和智能化问题,是矿井设计ＣＡＤ的难点和重点。用建立采矿因素库的方法可以较好的解决这个问题,目前研制的矿井设计ＣＡＤ系统已在现场应用。并在教学实践中推进了采矿工程学科的教学方法和课程设置改革。     

关于工科专业图形课程计算机辅助教学软件的探讨

根据目前高校对计算机辅助教学软件的需要，针对工精力产形类教学的特点，提出一个用ＡｕｔｏＣＡＤ作为开发平台设计ＣＡＤ辅助教学系统的实现方案。     

AUTO CAD二次开发方法研究

研究ＡＵＴＯＣＡＤ的二次开发方法，讨论可供用户利用的界面及工具库的设计，提出自动生成形、菜单、汉字的算法及管理方法，并介绍一个二次开发ＡＵＴＯＣＡＤ的基本模型．     

为Auto CAD制作矢量符号的技术

讨论了通过编程控制鼠标器制作矢量字符的原理，在介绍了ＡｕｔｏＣＡＤ形文件的结构后，以对俄文点阵字符矢量化为例。给出了为ＡｕｔｏＣＡＤ加上俄文标注功能的过程。该方法可直接用于制作特殊图符、空心矢量汉字等。     

AutoCAD 形文件自动生成技术的实现

介绍一种在ＡｕｔｏＣＡＤ环境中实现自动生成形文件的方法,其核心思想是由ＡＤＳ＿Ｃ提取所选中屏幕图形的关联码,析取实体数据生成相应的形文件（．ｓｈｐ）,并由应用程序调用编译命令（ｃｏｍｐｉｌｅ）编译形成编译文件（．ｓｈｘ）。所有过程完全在ＡｕｔｏＣＡＤ环境由ＡＤＳ＿Ｃ实现,该方法由ＶｉｓｕａｌＣ＋＋１．５实现。     

地质、采矿图形软件的开发

本文为露天矿山地质、测量及开采设计等工作专门开发了一套微机图形软件；主要解决了地质、采矿图形的输入，图形的控制显示．图形编辑，高级语言与ＡｕｔｏＣＡＤ软件的联接，以及工程图纸的绘制问题。     

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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