Rough集理论在机场救援辅助决策系统中的应用

首次将粗糙集理论引入机场应急救援辅助决策过程中,对如何利用粗糙集理论中的知识约简方法从历史数据中提取规则进行救援辅助决策的问题进行了探索,并通过实例演示了提取规则的过程。为如何建立和完善决策规则库以实现高效的智能辅助决策提供了一种新的思路。     

基于CBR与RBR的应急决策支持系统设计与实现

针对突发事件应急决策主要使用技术CBR与RBR各自的不足,提出一种CBR与RBR相融合的方法。使用CBR对RBR进行辅助,首先使用CBR检索出相似历史案例,然后使用RBR技术对历史案例的解决策略进行修改,解决了由CBR生成解决策略需要人工修正导致的决策速度慢、决策不准确等问题,降低了规则推理所需规则的复杂度及其获取难度,实现了CBR与RBR结合的应急决策辅助系统。该系统较单一CBR在预案生成速度以及准确性上都有明显提高。     

浅论高校公共突发事件应急决策的逻辑生成路径

在高校公共突发事件应急决策过程中,由于决策环境的非确定性、约束条件的非常态化和决策过程的非程序性等方面的影响,高校公共突发事件的应急决策复杂而多变,这给决策者带来极大的挑战与风险。为了最大程度地保证应急决策方案的良好效果,提高应急决策的科学性,决策主体需要从正确的逻辑起点、科学的逻辑方法、有效的逻辑策略和综合的逻辑过程等逻辑生成角度构建明确的应急决策目标指向、合理的应急决策评估机制、动态的应急决策调整方案和积极的应急决策情境交互思维,掌握高校公共突发事件的演化规律并对其进行科学认知,形成科学判断,提高应急决策的生态理性。     

基于思维进化算法的工业过程粗糙建模及应用

针对粗糙集理论不能直接处理连续属性决策表的不足,提出了一种基于思维进化算法的属性离散化方法,并应用到工业过程建模中.文章对水泥回转窑控制系统进行建模的方法：首先应用思维进化算法对决策表中的连续属性进行离散化,然后利用粗糙集理论化简决策表,提取最优的决策规则,最后分析决策规则,得出结论.结论说明了该建模方法的可行性,且由此建模方法得到的决策规则覆盖度较高.     

从进化心理学角度探析人类的择偶策略

进化心理学是近年来在西方心理学中新出现的一股心理学思潮。它以进化论为基础,对人类心理的结构和起源进行了研究和探讨。在长期的进化过程中,女性必须解决众多复杂的适应性问题,从而形成纷繁复杂的择偶偏好,而男性由于进化过程中与女性所面临不同的适应性问题而形成与女性有差异的择偶策略。     

突发事件属地管理中的应急决策困境——基于重大传染病事件的考察

政府在应对突发事件的初期阶段,面临常态化与非常态化管理的衔接和转换问题,给突发事件发生地政府的属地管理带来挑战。属地政府的应急决策面临危机研判和应急处置两方面的难题,受决策信息与处置权限等要素的影响,表现出危机认知的模糊性与政府响应的及时性之间难以匹配、应对结果的不确定性与资源投入的高要求之间难以匹配、应对策略的针对性与决策权限的有限性之间难以匹配、危机决策的主动性与事故问责的严厉性之间难以匹配的障碍。由此,政府的属地管理不能过度强调属地责任,既应当考虑科学认知的渐进过程,还需考量官员履职的具体限度,从完善法律角度优化重大突发事件的应急决策体系。     

课程决策─—从理论到实践

课程决策─—从理论到实践刘焱编者按：目前幼儿园课程改革中还存在一些具体问题没有很好地解决，其中教育活动的设计便是一个较为突出的问题。刘焱同志这篇关于课程决策的文章，对课程决策的过程、利用课程决策策略进行教育活动设计的方法等进行了较为全面的阐述。应该说...     

应急电力修复系统的决策研究

基于层次分析及其最短路方法为应急电力修复系统提供了决策,即运用层次分析方法,对用电单位重要性及其影响人数进行量化,对请求修复客户进行排序;运用最短路方法,得到最佳修复路线.为电力公司制定切实有效的电力修复策略提供可靠的依据.     

可持续发展决策支持系统开发与应用

讨论了发展中国家可持续发展问题的特征 ,为开发和应用决策支持系统辅助发展中国家可持续发展问题的决策 ,给出了构造可持续发展决策支持系统的策略、可持续发展问题模型化的表示方法、开发定义可持续发展问题的非过程性语言的方法和基于定理证明的数值计算与非数值计算     

基于进化博弈理论的高职学生管理策略探析

阐述了进化博弈理论的基本内容,并对高职院校学生管理现状进行分析.基于进化博弈理论的基本思想及方法,研究高职院校学生管理问题,由此提出高职院校学生管理的策略及建议.     

嵌入式系统电磁兼容设计研究

介绍了嵌入式系统电磁兼容的定义,提出了电磁干扰模型。分析了嵌入式系统中产生电磁干扰的主要原因,总结了电磁兼容设计的主要方法。最后以嵌入式系统电磁兼容设计为例,以验证主题观点。     

评估风险的期望损失计算及应用研究

Expected shortfall(ES) is a new method to measure market risk. In this paper, an example was presented to illustrate that the ES is coherent but value-at-risk(VaR) is not coherent. Three formulas for calculating the ES based on historical simulation method,normal method and GARCH method were derived. Further, a numerical experiment on optimizing portfolio using ES was provided.     

Calculation of Expected Shortfall for Measuring Risk and Its Applications

Expected shortfall(ES) is a new method to measure market risk. In this paper, an example was presented to illustrate that the ES is coherent but value-at-risk(VaR) is not coherent. Three formulas for calculating the ES based on historical simulation method, normal method and GARCH method were derived. Further, a numerical experiment on optimizing portfolio using ES was provided.     

对CAD技术发展前景的探讨

本文概述了CAD(Computer Aided Design)技术的基本概念及其应用领域的发展状况,认为CAD技术存在缺陷和不足的主要原因是由于缺乏知识表示和推理机制。本文通过阐述专家系统技术的定义、组成及其领域,预示了CAD技术今后的发展方向和趋势。我们分析了我国专家系统技术和CAD技术目前的应用状况,指出在CAD技术中采用专家系统技术不仅是必要的而且是可能的,目的是为了引起人们对专家系统技术的足够重视。     

Metabonomic analysis of hepatitis B virus-induced liver failure: identification of potential diagnostic biomarkers by fuzzy support vector machine

Hepatitis B virus (HBV)-induced liver failure is an emergent liver disease leading to high mortality. The severity of liver failure may be reflected by the profile of some metabolites. This study assessed the potential of using metabolites as biomarkers for liver failure by identifying metabolites with good discriminative performance for its phenotype. The serum samples from 24 HBV-induced liver failure patients and 23 healthy volunteers were collected and analyzed by gas chromatography-mass spectrometry (GC-MS) to generate metabolite profiles. The 24 patients were further grouped into two classes according to the severity of liver failure. Twenty-five commensal peaks in all metabolite profiles were extracted, and the relative area values of these peaks were used as features for each sample. Three algorithms, F-test, k-nearest neighbor (KNN) and fuzzy support vector machine (FSVM) combined with exhaustive search (ES), were employed to identify a subset of metabolites (biomarkers) that best predict liver failure. Based on the achieved experimental dataset, 93.62% predictive accuracy by 6 features was selected with FSVM-ES and three key metabolites, glyceric acid, cis-aconitic acid and citric acid, are identified as potential diagnostic biomarkers.     

How democratic is higher education for sustainable development?

We wondered how ‘democracy’ was being used and communicated within the higher education discourse of ‘education for sustainability’, or ‘for sustainable development’ (ES/ESD). We used a philosophical hermeneutic approach to explore the sense or senses in which the concept of democracy is used within this literature and supported our analysis by incorporating text about democracy from other disciplines. We conclude from our analysis that the concept of democracy within ES/ESD texts has evolved to suggest many meanings that in their entirety do not support our shared research mission towards ES/ESD. At the pens of ES/ESD scholars, democracy may have become one of Sartori's intolerably blunted conceptual tools.     

子宫恶性肿瘤血清标志物CA125,CA199,CA153检测的临床意义

目的通过检测子宫恶性肿瘤患者血清中标志物CA125,CA199,CA153含量,探讨其能否作为评价治疗效果及预后中的一项检测指标.方法对103例子宫恶性肿瘤治疗前检测血清中CA125,CA199,CA153含量,部分患者治疗后追踪检测血清中CA125,CA199,CA153含量.结果治疗前血清中CA125,CA199,CA153在Ⅰ、Ⅱ期子宫内膜腺癌及腺鳞癌的阳性率明显低于Ⅲ、Ⅳ期(P<0.01).肿瘤切除后,CA125,CA199,CA153转为阴性,肿瘤复发或转移时标志物又复阳性.结论CA125,CA199,CA153的检测有助于治疗效果的评价、病情监测及预后的估计.     

In-package P/G planes analysis and optimization based on transmission matrix method

Power integrity （PI） has become a limiting factor for the chip＇s overall performance, and how to place in-package decoupling capacitors to improve a chip＇s PI performance has become a hot issue. In this paper, we propose an improved transmission matrix method （TMM） for fast decoupling capacitance allocation. An irregular grid partition mechanism is proposed, which helps speed up the impedance computation and complies better with the irregular power/ground （P/G） plane or planes with many vias and decoupling capacitors. Furthermore, we also ameliorate the computation procedure of the impedance matrix whenever decoupling capacitors are inserted or removed at specific ports. With the fast computation of impedance change, in-package decoupling capacitor allocation is done with an efficient change based method in the frequency domain. Experimental results show that our approach can gain about 5× speedup compared with a general TMM, and is efficient in restraining the noise on the P/G plane.     

Student Teaching at a Nature Center

Abstract

A statewide assessment of the status of environmental science (ES) in Texas school districts was conducted in 1985. Respondents were 126 science curriculum supervisors and 278 teachers (grades seven through twelve) representing 339 (38 percent) of those independent school districts (ISDs) (N = 893) having at least one science-certified teacher. The assessment results characterized ES in terms of grade level, subject matter, and implementor; degree to which ES facilities external to the classroom are used and factors preventing their use; ES teaching materials used and needed; levels of emphasis placed on selected teaching strategies; those content areas emphasized in ES; and ES implementation difficulties and needed assistance.