A neural network based system for predicting earthmoving production

An artificial neural network based system (NN earth) is developed for construction practitioners as a simple tool for predicting earthmoving operations, which are modelled by back propagation neural networks with four expected parameters and seven affecting factors. These networks are then trained using the data patterns obtained from simulation because there are insufficient data available from industrial sources. The trained network is then incorporated as the computation engine of NN earth. To engender confidence in the results of neural computation, a validation function is implemented in NN earth to allow the user to apply the engine to historic cases prior to applying it to a new project. An equipment database is also implemented in NN earth to provide default information, such as internal cost rate, fuel cost, and operator's cost. User interfaces are developed to facilitate inputting project information and manipulating the system. The major functions and use of NN earth are illustrated in a sample application. In practice, NN earth can assist the user either in selecting a crew to minimize the unit cost of a project or in predicting the performance of a given crew.     

Auto CAD的层、块及菜单技术在机械图样中的应用

本文阐述了 Auto CAD 层、块及菜单技术在机械图样中的应用方法和技巧。从而使得计算机辅助机械设计的速度得以提高,并且可以减少磁盘空间的占有量。     

数据记录与功能菜单全屏幕透明管理的新技术

本文介绍了数据库管理系统中数据记录与功能菜单并存全屏幕透明管理操作的新技术,给出了程序实例.该技术已在对外软件工程中应用.     

基于EBO的建模工具CAEASRII/EB应用研究

基于效果作战(EBO)的概念是根据联合作战中各相关行动的总体效果提出来的。为了辅助分析基于效果作战的行动过程和根据达到期望效果的可能性对其进行评估,建立了仿真建模工具CAESARII/EB的原型系统。该工具集成了基于离散事件系统建模技术的影响网络,既支持对行动过程的静态评估,又支持对行动过程的动态评估。本文描述了构造和使用该模型的方法,讨论了根据这些方法来提高建模技术的需求。     

An algorithm for computing the restriction scaffold assignment problem in computational biology

Let S and T be two finite sets of points on the real line with |S|+|T|=n and |S|>|T|. The restriction scaffold assignment problem in computational biology assigns each point of S to a point of T such that the sum of all the assignment costs is minimized, with the constraint that every element of T must be assigned at least one element of S. The cost of assigning an element si of S to an element tj of T is |si−tj|, i.e., the distance between si and tj. In 2003 Ben-Dor, Karp, Schwikowski and Shamir [J. Comput. Biol. 10 (2) (2003) 385] published an O(nlogn) time algorithm for this problem. Here we provide a counterexample to their algorithm and present a new algorithm that runs in O(n²) time, improving the best previous complexity of O(n³).     

系统优化在电信业务运营商运行维护中的意义

以中国联通网络中DWDM系统和SDH系统为例，阐述网络优化和传输设备的系统优化过程以及优化在网络维护中的意义。     

基于AutoLISP的AutoCAD菜单汉化

菜单是人机对话的接口,介绍了AutoCAD菜单,探讨了基于AutoLISP语言的AutoCAD菜单文件的汉化方法。     

提高软件图形用户接口设计品质的一种途径

文章针对目前国内软件企业在开发中存在的用户接口(人机界面)设计上的问题,提出了提高软件图形用户接口设计品质的一种途径。并根据作者以往的工作,提出了用户接口设计的一般原则以及一些注意事项。     

微机控制充电电池自动检测仪

详细介绍了应用微机技术所研制的充电电池自动检测仪的构成,实用电路及为提高测量精度所采取的措施。实践证明它具有技术性能好、可靠性高、使用方便的优点。获得了令人满意的结果。     

AutoCAD在园林设计中定制植物图标菜单

目前,有许多专业机构利用AutoCAD软件开发了许多园林设计专用软件,如佳园、天秀园林、Landcadd2004等,但是也可以利用AutoCAD软件标准菜单的开放功能,结合幻灯片制作和图像控件菜单定制等技术,自己制作标准化的园林设计图标菜单,将普通AutoCAD软件改制成园林设计专用软件,从而提高园林设计的工作效率.