基于软构件的动态企业建模技术

动态企业建模是企业信息化工程中的一次重大变革.本文在分析动态企业建模理论的基础上,提出了一种基于软构件的动态企业建模技术:在企业建模过程中引入软构件,通过对模型构件的动态重构,快速建立同时具备柔性和扩展性的企业模型.文中详细说明了企业模型的构件化过程和基于软构件的动态建模体系.     

一种新的多维稀疏规则模糊插值推理方法

经典的插值理论针对一维稀疏规则库的条件，提出了各种不同的插值方法，取得了很多很好的经验．但对多维稀疏规则条件的近似推理，研究很少，仅有的几种插值方法，存在着难以保证推理结果的凸性和正规性等问题．为了在多维稀疏规则条件下能得到好的插值推理结果。提出了一种基于几何相似的插值推理方法．该方法能较好地保证推理结果隶属函数的凸性和正规性，为智能系统中的模糊推理提供了一个十分有用的工具．     

基于VB6.0的PC-单片机多波特率通信检测方法

在PC-单片机分布式多波特率通信系统中．利用微软的MSComm控件、VB6．0编程语言和单片机的定时／记数器可以智能、准确、简单地实现单片机波特率随主机变化而自动检测调整。     

An effective hybrid genetic algorithm for flow shop scheduling with limited buffers

As a typical manufacturing and scheduling problem with strong industrial background, flow shop scheduling with limited buffers has gained wide attention both in academic and engineering fields. With the objective to minimize the total completion time (or makespan), such an issue is very hard to solve effectively due to the NP-hardness and the constraint on the intermediate buffer. In this paper, an effective hybrid genetic algorithm (HGA) is proposed for permutation flow shop scheduling with limited buffers. In the HGA, not only multiple genetic operators based on evolutionary mechanism are used simultaneously in hybrid sense, but also a neighborhood structure based on graph model is employed to enhance the local search, so that the exploration and exploitation abilities can be well balanced. Moreover, a decision probability is used to control the utilization of genetic mutation operation and local search based on problem-specific information so as to prevent the premature convergence and concentrate computing effort on promising neighbor solutions. Simulation results and comparisons based on benchmarks demonstrate the effectiveness of the HGA. Meanwhile, the effects of buffer size and decision probability on optimization performances are discussed.     

基于利润最大化的奥运商业网点分布微观经济模型

本文首先通过多元统计分析发现了统计数据中的一般规律,并讨论了数据中所反映出的某些与常识不一致之处。在通过图论的有关知识确定观众进出体育场馆的模式之后,我们建立了一个简单实用的基于成本利润分析的整数规划模型。通过Lingo、Matlab软件的模拟,该模型与现实环境和有关经济理论拟合较好,可以为2008年奥运会迷你超市的设置提供一定的参考。     

耒阳电厂200MW机组给水温度低原因分析及经济性计算

给水温度是影响电厂机组经济运行的一项重要指标．以热力试验为基础，分析了耒阳电厂200MW机组运行中给水温度低的原因，并应用等效热降法进行经济性计算，最后提出了改进措施．     

Synthesis and characteristics of SiC whiskers with “rosary bead” morphology

SiC whiskers with ″rosary bead″ morphology were synthesized using suitable silicon source and carbon source through solid reaction at the temperature above 1537 K. The diameter and length of the SiC whiskers were about 0.1-1.0 μm and 20-100 μm,respectively. The largest diameter of their enlarged ends of the whiskers was about 0.2-1.0 μm, and it gradually and smoothly decreased to the size of the plain part of the whiskers. The results of X-ray diffraction analysis show that the crystalline structure of the obtained SiC whiskers is β-SiC. It is considered that the SiC whiskers grow via a vapor-solid mechanism.     

外源NO和ABA对杨树气孔运动和SOD及POD活性的影响

研究了外源NO和脱落酸(ABA)对杨树气孔运动和SOD、POD活性的影响。结果表明：NO和ABA均可诱导杨树叶片气孔关闭，且NO有加强ABA诱导气孔关闭的作用。NO清除剂(C—PTIO)能显抑制NO和ABA对气孔关闭的诱导效应。不同浓度硝普钠(SNP)和ABA处理杨树离体叶片，SOD活性变化不明显，POD活性受到显抑制。粗酶液的体外实验结果表明，不同浓度SNP对POD活性的抑制呈明显的浓度及时间效应；而ABA对POD活性则几乎没有影响。说明在ABA调控气孔运动的过程中需要NO的参与，由此推测ABA对杨树叶片气孔运动的调节与NO对POD的抑制有关。     

用于空气净化的电除尘理论分析

论述了电除尘器用于工业除尘与空气净化时的差异,分析了电除尘器效率公式以及有效驱进速度等要点,讨论了电除尘器设计中的类比方法。     

建筑装饰工程概预算课程教学改革探讨

建筑装饰工程概预算课程是环境艺术设计专业的一门重要专业课。针对我国现行工程量清单计价模式的特点,结合目前教学中存在的问题,从教学内容、教学方法等多方面提出了该课程教学改革的基本思路,探讨了建筑装饰工程概预算课程教学的新模式。