基于Creator的三维模型的简化研究

三维模型是虚拟现实系统中重要的组成部分，在三维模型的处理中存在两个主要问题：一是载入场景文件要花费很多时间；二是即使是在高性能的PC机上，浏览场景也是一件繁重而费时的事。当鼠标移动之后，场景变换要滞后几秒钟甚至几分钟。为此需要对模型进行优化，该文从简化模型和提高渲染速度两个方面介绍了基于Creator的优化三维模型及减少载入时间的几种方法。     

光互联通信系统建模与仿真

该文在对光互联通信系统分析的基础上，建立了从电发端到电收端整个传输系统的模型，并通过建立仿真和测试平台光互联通信系统进行了仿真，给出了仿真结果，重点讨论了邻道串扰的影响。与实验结果相对照证明了所建模型的正确性。     

兴奋在有髓鞘神经纤维上传递速度的计算模型

神经系统的信号传递是学习、记忆、感觉、运动等各种脑正常功能的基础，因此它的理论也是神经精神病理学的基础。但是，到目前为止对于兴奋在有髓鞘神经纤维上传递速度的定量分析却很少。该文以有髓鞘神经纤维为研究对象，通过分析动作电位的传递机制，得出了可用跨膜电流的传递速度来等效动作电位的传递速度的结论。根据McNeal模型和CRRSS模型推导出跨膜电流的时间函数，最后给出了动作电位在有髓鞘神经纤维上传递速度的计算模型。     

面向对象技术在弹库弹列运动仿真中的应用

弹库系统是向舰炮发射系统补弹、供弹的复杂机电系统。本文主要以某型弹库系统弹列的运动为背景,在已知弹库操控逻辑和弹列运动的基本规律的基础上,采用面向对象的方法对弹位、弹列进行建模,实现弹列运动的程序仿真。     

利用高分辨率遥感地图自动更新道路信息

本文提出了利用高分辨率遥感地图实现道路信息自动更新的系统。系统利用辅助数据——数字化地表模型结合彩色红外遥感图像，有效的实现分类；在随后的对象提取中，引进已有的GIS数据库优化了用于提取的Snakes算法。系统采用的先分类后提取的流程以及辅助数据的使用减少了干扰，也提高了系统的工作效率。     

MATLAB在三相异步电机短路堵转试验中的应用

根据三相异步电动机的工作原理．电磁关系以及短路堵转时的特点。建立电动机短路堵转时的电磁变化规律和数学模型．从而对三相异步电机进行短路堵转试验的仿真研究。本文为短路堵转试验的进行提供了理论依据。     

Meta-modelling and graph grammars for multi-paradigm modelling in AToM<Superscript>3</Superscript>

This paper presents the combined use of meta-modelling and graph grammars for the generation of visual modelling tools for simulation formalisms. In meta-modelling, formalisms are described at a meta-level. This information is used by a meta-model processor to generate modelling tools for the described formalisms. We combine meta-modelling with graph grammars to extend the model manipulation capabilities of the generated modelling tools: edit, simulate, transform into another formalism, optimize and generate code. We store all (meta-)models as graphs, and thus, express model manipulations as graph grammars.We present the design and implementation of these concepts in AToM³ (A_To_ol for M_ulti-formalism, M_eta-M_odelling). AToM³ supports modelling of complex systems using different formalisms, all meta-modelled in their own right. Models in different formalisms may be transformed into a single common formalism for further processing. These transformations are specified by graph grammars. Mosterman and Vangheluwe [18] introduced the term multi-paradigm modelling to denote the combination of multiple formalisms, multiple abstraction levels, and meta-modelling. As an example of multi-paradigm modelling we present a meta-model for the Object-Oriented Continuous Simulation Language OOCSMP, in which we combine ideas from UML class diagrams (to express the OOCSMP model structure), Causal Block Diagrams (CBDs), and Statecharts (to specify the methods of the OOCSMP classes). A graph grammar is able to generate OOCSMP code, and then a compiler for this language (C-OOL) generates Java applets for the simulation execution.     

Semantic constraint specification and verification of ebXML business process specifications

Electronic Business using eXtensible Markup Language (ebXML) Business Process Specification Schema (BPSS) supports the specification of the set of elements required to configure a runtime system in order to execute a set of ebXML business transactions. The BPSS is available in two stand-alone representations; a UML version and an XML version. Due to the limitations of UML notations and XML syntax, however, the current ebXML BPSS specification is insufficient to formally specify semantic constraints of modeling elements. In this study, we propose a classification scheme for BPSS semantic constraints, and describe how to represent those semantic constraints formally using Object Constraint Language. As a way to verify a particular Business Process Specification (BPS) with formal semantic constraint modeling, we suggest a rule-based approach to represent the formal semantic constraints, and describe a detail mechanism to apply the rule-based specified constraints to the BPS in a prototype implementation.     

A pulp mill benchmark problem for control: application of plantwide control design

A heuristic for design of plantwide control strategies is introduced and applied to the millwide control of a previously presented pulp mill benchmark. Two control strategies (decentralized control and unit-based model predictive control) are compared according to their capacity to reduce the total error and maximize the operating profits. The control strategies are studied through closed-loop simulations of the process including several disturbances and setpoint changes in the digester, oxygen reactor, bleach plant, recausticizing plant and lime kiln.     

Mobitex网络技术及其在电力系统中的应用

目前我国移动数据业务大部分通过话音优先的移动电话网传输，存在影响数据通信质量的情况，提出发展专用的窄带无线数据通信系统的必要性。分析Mobitex无线广域网技术和特点，针对目前电力通信系统的特点，给出Mobitex技术在电力系统的应用实例，指出利用Mobitex技术建立电力系统窄带专网实现电力系统内部无线数据通信有很大的应用前景。