ARX在岔管过渡段曲面CAD中的应用

ＡＲＸ是基于ＡｕｔｏＣＡＤ进行ＣＡＤ软件开发的新一代开发工具。本文讨论了利用ＡＲＸ在ＡｕｔｏＣＡＤ ＲＭ上进行岔管过渡段曲面ＣＡＤ开发的方法。     

用ARX开发明细表自动生成系统

讨论了在ＶｉｓｕａｌＣ＋ ＋ 环境下,用ＡＲＸ（ＡｕｔｏＣＡＤＲｕｎｔｉｍｅ ｅＸｔｅｎｓｉｏｎ）开发运行在ＡｕｔｏＣＡＤＲ１４ 环境下的明细表自动生成系统。     

用ARX进行变径岔管曲面CAD开发

讨论了利用ＡＲＸ在ＡｕｔｏＣＡＤＲ１４上进行变径二岔 管和三岔管曲面ＣＡＤ二次的方法,文中讨论了的方法可用于其它类似的基于ＡｕｔｏＣＡＤ的ＣＡＤ系统的二次开发。     

巧用系统打印机输出AutoCAD、WORD及EXCEL复合工程DWG图形

１前言 ＡｕｔｏＣＡＤ的文字编辑功能很弱,虽然其提供了ＭＴＥＸＴ命令可创建多行文字,但ＭＴＥＸＴ可编辑文字的最大容量为Ｉ６Ｋ,并且不能制表,不能满足一些特定工程图形文件的设计需求。ＷＯＲＤ及电子表格软件ＥＸＣＥＬ,可编辑复杂格式的文档说明和灵活的计算表格。将ＡｕｔｏＣＡＤ和ＷＯＲＤ、ＥＸ．ＣＥＬ集成应用,可以快速制作图、文、表并茂的复合工程ＤＷＧ图形文件。工程设计上一般通过将ＷＯＲＤ文档、ＥＸＣＥＬ表格插入到ＡｕｔｏＣＡＤ图形中,把ＤＷＧ图形文件打印成ＰＬＴ格式文件,然后通过网络传到打印中心批量…     

AutoCAD实时扩展的研究

详细研究了ＡｕｔｏＣＡＤ实时扩展（ＡＲＸ）开发环境,对ＡｕｔｏＣＡＤ的各种开发技术进行了比较,分析了ＡＲＸ应用程序的建立、设置及使用。     

基于类定义的室内设计CAD系统的设计与开发

介绍了基于类定义的“室内设计ＣＡＤ系统”的主要设计思想玫系统的主要功能特点,论述了训采用面向对象设计思想和ＡＲＸ编程技术以及专业对象按类进行定义的方法和优点,该系统是ｕｔｏＣＡＤＲ１４开发平台和ＯｂｊｅｘｔＡＲＸ开发系统进行设计和开发的,因此具有ＣＡＤ的基本功能、室内设计功能（包括门设计、窗设计、墙设计、屋顶设计和楼梯设计等）和图库导航功能,该系统采用面向对象的分析设计方法,并利用ＡｕｔｏＣＡＤ核     

ODBC与ObjectARX结合开发产品数据管理应用程序

本文首先讨论了 ＡｕｔｏＣＡＤ２０００中 ＯｂｊｅｃｔＡＲＸ ＳＤＫ的特点和编程环境及ＭＦＣ中的ＯＤＢＣ数据库开发方法,然后讨论了将二者结合起来进行 ＡｕｔｏＣＡＤ 二次开发,设计产品数据管理应用程序的方法。在 ＯｂｊｅｃｔＡＲＸ中应用ＭＦＣ,几乎可以利用ＭＦＣ的所有功能和资源,将两者的优点加以综合,大大增强了ＡＲＸ应用程序的功能。     

ARX在建筑装饰CAD中的应用

ＡＲＸ（Ａｕｔｏ ＣＡＤ Ｒｕｎｔｉｍｅ ｅＸｔｅｎｓｉｏｎ）是新一代的面向对象的ＡｕｔｏＣＡＤ开发环境。其支持面向对象技术的特性改变了传统的ＣＡＤ软件开发模式,以建筑装饰领域中的楼梯为例,剖析了ＡＲＸ的面向对象分析、设计和开发思想,并深入探讨了开发过程中其它一些关键技术问题,如对象名字管理策略、虚拟用户坐标系（ＵＣＳ）、图像用户界面（ＧＵＩ）、公用库等,展示了ＡＲＸ在建筑装饰ＣＡＤ领域中的广阔应     

在AutoCAD下三维参数化造型系统的实现

本文系统地介绍了在ＡｕｔｏＣＡＤ下,通过使用ＡＲＸ二次开发,实现三维参数化造型的一种方法,对ＡｕｔｏＣＡＤ的实体造型命令进行了重新定义,并提供了对三维参数实体编辑手段,弥补了ＡｕｔｏＣＡＤ三维造型的可编辑性差,不能参数化造型的弱点,使用户可方便地在ＡｕｔｏＣＡＤ下进行三维造型。     

在AutoCAD下三维参数化造型系统的实现

本文系统地介绍了在ＡｕｔｏＣＡＤ下,通过使用ＡＲＸ二次开发,实现三维参数化造型的一种方法,对ＡｕｔｏＣＡＤ的实体造型命令进行了重新定义,并提供了对三维参数化实体编辑手段,弥补了ＡｕｔｏＣＡＤ三维造型的可编辑性差、不能参数化造型的弱点,使用户可方便地在ＡｕｔｏＣＡＤ下进行三维造型。     

Effective solution of certain problems of theory of schedulings of nets

Cybernetics and Systems Analysis -     

变电站一次设备喷涂PRTV用量的分析

对国网宁夏电力检修公司宁安运维站近2年来一次设备喷涂PRTV用量的统计数据进行分析整理,得出各类一次设备按照标准要求喷涂PRTV时的用量估算值,并针对现存作业中存在的问题,提出相应解决方案。     

Complexity of families of learning algorithms and estimation of the nonrandomness of extraction of empirical regularities

The paper presents a general approach to the evaluation of the complexity of classes of algorithms, so-called pVCD-method. To develop this method, all the examined families of models of empiric generalization were restricted to classes implementable on computers and, wider, by examining their partially recursive representations. Within the framework of the algorithmic approach, the concept of Kolmogorov’ complexity of algorithms for the recognition of properties or the extraction of regularities is proposed. The method proposed to evaluate the nonrandomness of the extraction of empirical regularities is based on this concept.     

Analysis of microdensitometric data in terms of probability of cleavage of DNA

Computer-aided analysis of autoradiographic films of DNA fragments is presented. The Powell least-squares procedure is used for optimization of parameters for components of complex densitometric curves. Since each densitometric spectrum may be divided for several non-overlapped blocks of bands, there is no upper limit on the number of parameters which must be optimized. Eight shapes for the component bands are utilized: symmetric and asymmetric Gauss and Cauchy functions, direct, symmetric and asymmetric product of Gauss function and inverse of Cauchy function, and log-normal function. The probability of DNA cleavage is calculated with correction for multiple cuts. The methods presented was applied to detailed analysis of densitometric spectra of a 21-bp DNA restriction fragment and allowed for direct correlation between structural microheterogeneity of DNA and the resulting cutting pattern. This method should facilitate the analysis of densitometric data from antibiotic-induced cleavage of DNA and footprinting experiments.     

联合收割机脱粒滚筒恒速智能控制器设计

研究了轴流式联合收割机的控制问题,给出了联合收割机脱粒滚筒的数学模型,介绍了基于模式识别的智能控制原理,建立了联合收割机脱粒滚筒恒速控制模型,设计了基于模式识别的智能恒速控制器.应用Matlab/Simulink进行了控制器仿真,其结果表明,将基于模式识别的智能控制应用于联合收割机脱粒滚筒的恒速控制,其过渡过程平稳、响应速度快、无超调、无振荡并且无稳态误差.     

An estimate of numbers of terms of semicycles of delay difference equations

In this paper, we study the semicycles of oscillatory solutions of the delay difference equation y_n+1 − y_n + p_ny_n-k = 0, where p_n is a sequence of nonnegative real numbers and k is a positive integer. Upper bound of numbers of terms of semicycles are determined in the case when

Our results improve and complement known results in literature.     

Complexity of approximation of 3-edge-coloring of graphs

The problem to find a 4-edge-coloring of a 3-regular graph is solvable in polynomial time but an analogous problem for 3-edge-coloring is NP-hard. To make the gap more precise, we study complexity of approximation algorithms for invariants measuring how far is a 3-regular graph from having a 3-edge-coloring. We show that it is an NP-hard problem to approximate such invariants with an error O(n1−ε), where n denotes the order of the graph and 0<ε<1 is a constant.     

Modifications of the method of variation of parameters

In spite of being a classical method for solving differential equations, the method of variation of parameters continues having a great interest in theoretical and practical applications, as in astrodynamics. In this paper we analyse this method providing some modifications and generalised theoretical results. Finally, we present an application to the determination of the ephemeris of an artificial satellite, showing the benefits of the method of variation of parameters for this kind of problems.