系统工程的软化——第二届英—中—日系统方法论国际会议述评

本文的系统工程指的是狭义的系统工程，包括系统工程方法论及其相应的建模与计算机技术。文章围绕第二届英-中-日系统方法论国际会议，介绍了近年来系统工程的软化趋向。全文分为三个部分，第一部分会议背景．论述了系统工程领域70年代所面临的困境，80年代以来的反思与对出路的探索；第二部分会议内容，介绍了这次会议所涉及的软的系统方法论及技术；第三部分是结束语。     

综合集成方法与专家挖掘

我们面临的一些科学和实际问题越来越复杂需要运用各种知识的综合和技术的集成,其中知识的综合尤其是将专家的活的经验和智慧挖出来更是人们所关注的.数据挖掘、文本挖掘和网上挖掘能依靠计算机和一些人工智能方法可以从大量数据、文本和网上信息中找出一些有用的规则和知识,但是对于样本较少、知识隐含的活的专家经验如何去挖掘就是专家挖掘要研究的内容.作者及其同事们在近10年的研究中形成了一些概念、方法,并在一些社会问题、中医专家经验传承等进行了应用和探索.     

一类哈密顿系统周期轨道族周期的单调性

对于哈密顿函数为一定正的齐二次多项式与一高次齐次多项式之和的情况,本文讨论了对应的系统在原点周围周期轨道族周期的单调性。主要结果是:当高次项是奇数次齐次多项式时,周期函数是单调增加的;当高次项是四次齐次多项式时,得到了单调的充要条件。     

Three aspects on solving queuing service system in Shanghai world expo

This paper analyzes the queuing problem that was experienced during the Shanghai World Expo of2010.The queuing problem will be discussed at three levels.The three levels include the physical,psychological,and social aspects of the queuing problem.The collective behavior of visitors is studied through analyzing the information from the different sources,such as,the network of electronic eyes,the evaluation platform based on mobile phone system and the Internet.A hybrid information network technology is implemented.Based on the Wuli-Shili-Renli(WSR) system methodology,a new theoretical analysis framework for the queuing problem is proposed.     

航天系统安全性分析的概率风险评估方法

在对航天系统进行安全性分析的定性、定量、综合方法的基础上，主要介绍了以定量风险评估为主的、在ＮＡＳＡ和ＥＳＡ均得到广泛应用的概率风险评估（ＰｒｏｂａｂｉｌｉｓｔｉｃＲｉｓｋＡｓｓｅｓｓｍｅｎｔ，ＰＲＡ）方法．着重介绍了该方法的基本思想和具体实施过程，并探讨了在我国航天系统安全性分析中使用ＰＲＡ方法的可行性。     

无人机航摄大比例尺测图的关键技术分析

为满足大比例尺测图对无人机航空摄影测量的要求,采用理论分析和实例研究相结合的方法生成正射影像图(digital orthoimage map,DOM),探讨了DOM生成过程中的影像畸变纠正、控制点布控、影像镶嵌以及海量数据处理等关键技术.以天津师范大学主校区为试验样区,对技术路线进行验证,结果表明:提出的方法具有可行性,可以满足1∶2 000比例尺测图精度的需要.     

广义Lineard方程的周期解

本文给出了广义Ｌｉｅｎａｒｄ方程ｘ＋ｆ（ｘ，ｘ）ｘ＋ｇ（ｘ）＝０存在非零周期解的两个充分条件，推广了文「２」的结果，并且指出文「１」和「３」中的疏漏。     

大功率电子管的使用和维护

为了延长大功率电子管的使用寿命，文章提出使用和维护大功率电子管的要求、方法和注意事项。     

World Expo 2010 pavilions clustering analysis based on self-organizing map

This paper reports the classification of 90 sample pavilions in Shanghai World Expo. An artificial intelligence based nonlinear clustering method known as Self-Organizing Map (SOM) has been used to classify expo pavilions. SOM is an efficient tool for visualization of multidimensional data. To conduct the classification, four characteristics namely Hurst exponent for queue length, Hurst exponent for waiting time, mean queue length and mean waiting time have been applied. The classification results show that Shanghai World Expo pavilions can be optimally classified into four classes. This result will shed light on further studies that how to manage the queue of World Expo pavilions in the future.     

SOME DEVELOPMENTS IN THE STUDIES OF META—SYNTHESIS SYSTEM APPROACH

In the early 1990s, Professor Qian Xuesen(Tsien HsueShen)and his colleagues proposed theMetasynthesis system approach for solving the open complex giant system problems. The methodemphasizes the synthesis of collected information and knowledge of various kinds of experts, andcombining quantitative methods with qualitative knowledge. Later it is evolved into Hall of Workshopfor Meta-Synthetic Engineering (HWMSE)which emphasizes to make use of breaking advances ininformation technologies. Then continuous endeavors have been taken to put those ideas into practice.With tremendous advances in networking and distributed computing technologies, past difficulties inimplementation are disappearing together with further understandings of HWMSE and fruitful resultsachieved in similar or relevant research fields in recent years in China. In this paper some of thosedevelopment are introduced, together with some parallel research work abroad.