AutoCAD、MDT与其它软件集成应用的几点体会

一个项目常常需要运用几个软件,有效的互相交换数据才能地完成。如企业ＭＲＰⅡ／ＥＲＰ系统中,一般应包括从旧图纸扫描成光栅图像,再编辑的软件如Ｐｈｏｔｏｓｈｏｐ、Ｓｃａｎｓｍｉｔｈｐｒｅｄｉｔｏｒ;能进行光栅矢量混合编辑,部分矢量化的如ＡｕｔｏＣＡＤＯｖｅｒｌａｙ、ＧＴＸ等;现在通用的２Ｄ机械绘图平台ＡｕｔｏＣＡＤ;目前和将来发展的融合２Ｄ与３Ｄ的通用３Ｄ参数化机械设计平台ＭＤＴ;ＣＡＥ软件,如机构仿真ＷＭ　Ｍｏｔｉｏｎ;有限元分析ＷＭＦＥＡ＆ＷＭＣｏｎｃｅpｔ;ＣＡＭ软件,如加工中心ＨｙｐｅｒＣＡ…     

烟草企业管理信息系统SIEC MRP-II的设计与实现

ＳＩＥＣ ＭＲＰ－ＩＩ是一套自成体系的、适合中国卷烟制造业特点的网络化制造资源计划（ＭＲＰ）管理信息系统。该系统针对卷烟制造业特点,引进了ＭＲＰ－ＩＩ的管理思想和方法,采用“三层”分布式计算架构和客户／服务器计算架构实现,具有良好的结构和性能,其后端由应用服务器和数据库系统服务器组成,与前端各个ＭＩＳ子系统紧密结合,构成一个完整系统。介绍了ＳＩＥＣ ＭＲＰ－ＩＩ系统的架构和技术特征、管理思想和系统     

烟草企业管理信息系统SIEC MRP-Ⅱ的设计与实现

ＳＩＥＣ　ＭＲＰ－Ⅱ是一套自成体系的、适合中国卷烟制造业特点的网络化制造资源计划（ＭＲＰ）管理信息系统。该系统针对卷烟制造业特点,引进了ＭＲＰ－ＩＩ的管理思想和方法,采用“三层”分布式计算架构和客户／服务器计算架构实现,具有良好的结构和性能,其后端由应用服务器和数据库系统服务器组成,与前端各个ＭＩＳ子系统紧密结合,构成一个完整系统。介绍了ＳＩＥＣ　ＭＲＰ－Ⅱ系统的架构和技术特征、管理思想和系统实现。     

快速原型技术的应用

本文以分层实体制造（ＳＳＭ）和熔融沉积制造（ＭＥＭ）两种工艺为例，介绍了快速成形技术的一些应用，并且讨论了ＲＰ技术的最新发展动态。     

AutoCAD绘图功能的扩展

本文讨论了在ＡｕｔｏＣＡＤ下如何对其绘图功能进行扩展的一般性技术，包括命令组文件绘图、数据库绘图、程序绘图等一系列绘图技术，这些技术也是ＡｕｔｏＣＡＤ二次开发中的不可或缺的内容。此外，还介绍了ＡｕｔｏＣＡＤ中用Ｃ语言开发系统ＡＤＳ，并用ＡＤＳ完成了对ＡｕｔｏＣＡＤ的功能扩展。     

MRPⅡ/ERP中财务管理系统设计

本文介绍了一种按照当今现代化的管理技术ＭＲＰⅡ／ＥＲＰ、结合中国企业实际和新财务制度而设计的财务管理系统。它解决了目前企业使用的孤岛式财务软件的问题，实现了财务系统内部乃至整个企业各种资源的集成，它为国产化ＭＲＰⅡ／ＥＲＰ乃至整个ＣＩＭＳ应用工程的实施提供了范例，具有一定的理论意义和重要的实用价值。     

X—Window应用程序与I—DEAS Drafting的集成技术

对软件二次开发中应用程序与绘图软件的集成技术进行了探讨,着重介绍了Ｘ－Ｗｉｎｄｏｗ应用程序与Ｉ－ＤＥＡＳ Ｄｒａｆｔｉｎｇ绘图软件的集成方法,通过此方法,可为用户提供一个集成的绘图环境。     

再论西文DOS下汉字显示

介绍利用ＢＡＳＩＣ语言的绘图功能，在ＶＧＡ图形卡上实现西ＤＯＳ下的汉字显示技术。利用该技术，可使应用软件的用户界面更完美。     

制造资源需求计划（MRP—Ⅱ）系统CCFS

本文介绍我们开发的资源计划系统ＣＣＦＳ的功能，ＭＲＰ求解的原理及求解ＭＲＰ的广度优先搜索算法及算例。     

企业管理信息化的又一次革命——从MRPⅡ到ERP

让理论工作者们继续去进行ＥＲＰ 是非的争论,企业ＭＩＳ 建设者依ＥＲＰ的崭新理念、网络技术的充足条件、企业信息的巨大基础和企业管理的强烈需求,在企业Ｉｎｔｒａｎｅｔ／Ｅｘｔｒａｎｅｔ 上构建自己的ＥＲＰ。     

Software aspects of business graphics

This paper considers some software and technical issues involved in the production of high quality three dimensional business graphics. It considers whether to use the vector or raster mode, the location or generation of source materials such as type fonts and geographic maps, existing 3-D plotting programs, and some technical issues in the calculation of 3-D plots. Finally it gives some examples of 3-D color plots illustrating different color techniques.     

An interactive image communication system using narrowband lines

A two-node network for interactive image communication, operating over 300 baud, switched telephone lines, has been developed and demonstrated. This system utilizes the concept of a common visual space where in an identical image is presented to all users. The image can be modified by any user, the results of which will be seen by all. Individual nodes can be either single- or dual-processor based. The latter configuration divides the load between a host processor, which executes the application and handles the communication to the other node, and a slave terminal processor, which provides the display capability and handles interrupts. A dual-processor arrangement provides flexibility in the choice of terminal, e.g. raster or random plotting. The slave terminal can be driven by any host computer which outputs information in a particular coded format called Graphical Task Instructions (GTI).     

Using the R statistical data analysis language on GRASS 5.0 GIS database files

Many researchers wish to explore and analyse spatial data, but typical software does not readily permit such integration. This paper presents a simple interface between two open-source software systems, the GRASS geographical information system, and the R statistical data analysis language. The platform used here is GNU/Linux, because both systems compile and install cleanly; R runs cleanly in Windows environments as well. The interface allows floating point and category data to be passed both ways for raster map layers and sites files; NULL raster cells in GRASS interchange with NA (not available) values in R. Because both systems are developing rapidly and GRASS database internals change often, the interface uses ASCII transfer via temporary files generated by standard programs. The interface operates by running R from within the GRASS environment, and issues commands to GRASS programs through the R system( ) function. The accompanying code is constructed as an R package, and contains wrapper functions for R plotting, and for R analytical functions returning gridded output, such as trend surface and kriging prediction, kernel density estimation of point patterns, and bicubic spline interpolation. These typical spatial analytical techniques, also often available in some form in GIS, are amply buttressed in R by a large range of other statistical and graphical functions, giving substantial insight into the data or results being handled. The interface will be extended to vector data, and will be coordinated with other database integration packages in R and GRASS.     

One-dimensional B-B polynomial and Hilbert scan for graylevel image coding

Effectiveness of one-dimensional Bezier-Bernstein polynomial has been studied for compression of graylevel images. Both raster and Hilbert scan have been used for this purpose. Two different algorithms for one-dimensional approximation and encoding of Hilbert images provide evidence of better compression ratio compared to that for raster scanned images. Comparison with the result of an existing algorithm has also been performed to examine the effectiveness of our methods.     

Modeling RPS and Evaluating Video Repair With VQM

Reference picture selection (RPS) is a promising repair technique in lossy networks for delay-sensitive video, whereby the video encoder uses one of several previous frames as a reference frame for predictive encoding. RPS can operate in two different modes: an optimistic policy that uses negative acknowledgements (NACKs) and a more conservative policy that relies upon positive acknowledgements (ACKs). This paper compares RPS NACK and RPS ACK under various network conditions and video contents using two analytical models. The two models characterize RPS NACK and RPS ACK by incorporating the impact of reference distance on video quality, prediction dependency among video frames and Group of Pictures (GOP) length. Given packet-loss rate, round-trip time and capacity constraints, the models predict average video quality for videos with RPS ACK and RPS NACK using the Video Quality Metric (VQM). Using these two models, a series of experiments are conducted to investigate RPS performance under various conditions. The insights derived from our models can help determine appropriate choices for RPS NACK and RPS ACK under various network conditions and video contents.     

A high level plotting system

This paper describes the use of a high level plotting system that has been in use at Oklahoma State University for about one year. The use of this plotting package can save much time and money for installations which use the Calcomp plotter. The program is written in ANSI FORTRAN and permits a user to produce complete graphs on a Calcomp plotter. The plotting system itself uses the assembly routines provided by the plotter manufacturer, thus freeing the user from most of the detail involved in producing two-dimensional plots. The plotting system plots and labels axes, produces interpolated and/or smoothed curves and performs other common plotting functions.     

Efficient Estimation of Qualitative Topological Relations based on the Weighted Walkthroughs Model

Weighted walkthroughs are a quantitative model for representing the spatial relation between two raster features in image databases. In this paper, we establish a correspondence between the weighted walkthroughs and qualitative models for spatial reasoning. We provide rules for estimating qualitative geometric properties and topological relations from the quantitative data that are computed for each pair of pixel sets. The approach has been tested through experiments with raster regions.     

电力监控系统图形绘制及数据处理一体化平台

介绍了一种应用于电力监控系统中的图形绘制与数据处理一体化平台,该平台避免了在图形绘制系统和数据处理系统中来回切换,使数据和图形的维护更加方便。在面向电力系统对象的数据建模基础上,阐述了图形绘制模块和数据处理模块的设计思想。最后,提出了一种分布式图形绘制的实现方案。实践表明,图形数据处理一体化平台能提高实时数据和图形的反应速度,大大提高了电力系统监控的运行管理水平。     

Topology in Raster and Vector Representation

Egenhofer's nine-intersection, well-known for vector representations, is defined here on a raster, using a hybrid raster model, and then systematically transformed to yield functions which can be used in a convolution operation applied to a regular raster representation. Applying functions, the hybrid raster elements need not be stored. It becomes thus possible to determine the topological relation of two regions, given in raster representation, with the same reasoning as in vector representations. This contributes to the merging of raster and vector operations. It demonstrates how the same conceptual operations can be used for both representations, thus hiding in one more instance the difference between them.