A Case－Based System for Construction Project Risk Management

1　IntroductionIn the field of construction,project risk management is a complex and important task.Therefore,it is very important for construction project managers to consider all possiblerisk factors affecting a given construction project. Furthermore,they should examine howthese factors interact in the decision- making process and how to balance subjective beliefsand information in identifying risk and uncertainties,and information,and takingcorrective actions to control the identified risk…     

对嗜好品风险认知的国际比较

对北京，大阪，洛杉矶3城市的市民就香烟和毒品的风险认知进行了抽样调查，并对其结果进行比较分析，主要结果如下：（1）中日美3国大约4／5的人对吸烟持负面性风险认知和评价，在3国中，美国人对吸烟的风险认知和危害性估计最高，中国居中，日本最低；（2）总体而言，中日美3国约9成以上的人对毒品持负面性风险认识和评价，在3国中，日本人对毒品的风险认知不安感最高，比较而言，美国人对毒品却表现出相对宽容的态度；（3）在3国中，日本人对香烟的社会容纳最高， 而对毒品的容纳度最低；美国人对毒品的社会容纳度远高于中国和日本；中国对香烟和毒品的社会容纳度都相对较低，这将有利于禁烟和禁毒。     

Study of Multistage Project Risk Identification-Assessment Process Based on Objective Orientation

Risk management of projects is about the real time ev aluation and making of decisions proactively in order to maximize the probabilit y of achieving or surpassing the targets set for project objectives. Project objective generally includes three elements: time, cost, quality. Risk occurrin g in the projects will affect these three factors to some various degrees in the end. There are different emphases in each stage and integrated balanced goals b etween the three factors. A large complex engineering ...     

Accurate forecasting of the undecided population in a public opinion poll

The problem of pollsters is addressed which is to forecast accurately the final answers of the undecided respondents to the primary question in a public opinion poll. The task is viewed as a pattern‐recognition problem of correlating the answers of the respondents to the peripheral questions in the survey with their primary answers. The underlying pattern is determined with a supervised artificial neural network that is trained using the peripheral answers of the decided respondents whose primary answers are also known. With peripheral answers as inputs, the trained network outputs the most probable primary response of an undecided respondent. For a poll conducted to determine the approval rating of the (former) Philippine president, J. E. Estrada in December 1999 and March 2000, the trained network predicted with a 95% success rate the direct responses of a test population that consists of 24.57% of the decided population who were excluded in the network training set. For the undecided population (22.67% of December respondents; 23.67% of March respondents), the network predicted a final response distribution that is consistent with the approval/disapproval ratio of the decided population. Copyright © 2002 John Wiley & Sons, Ltd.     

基于代理的校园网计费管理系统

根据目前Cernet校园网典型结构,设计了一种适应性广、通用性强的校园网计费管理系统,探讨了使用代理服务器进行计费的主要功能和工作流程.     

一种新的保费定价原理及其性质

K—阶均值保费定价原理具有成比例性、次可加性、保持随机序等等性质,揭示出它与较为熟悉的几种保费定价原理之间的联系。     

UPS网络控制和电压波形显示的研究

对目前在UPS方面研究的焦点问题作了阐述 ,并重点介绍了UPS网络控制系统的实现方法、系统功能和技术特点     

基于特征造型的注塑件CAD/CAE研究

以某电器零件的特征造型与注塑分析模拟为例，介绍了Pro/Engineer的特点以及在注塑件产品开发中的应用。     

THE TRANSFER BEHAVIOUR OF SOME CATIONS AT WATER／NITROBENZENE INTERFACE BY SEMIDIFFERENTIAL CYCLIC VOLTAMMETRY

The transfer of Sr~(2+) and Ba~(2+) ion, facilitated by 18-Crown-6 present in the aqueous phase, and of succinylcholine ion at w/nb interface were investigated by semi-differential cyclic voltammetry. A good polarographic curve of succinylcholine ion dissolved in water was obtained in the system of 0.01 mol/l LiCl (w)——0.01 mol/l TBATPB (nb). The peak current is directly proportional to the concentration of SC~(2+) ion. It can be used for the determination of SC and the detection limit is 1.05×10~(-5) mol/l.The apparent D~w and D~(nb) have been estimated. The transfer of Sr~(2+) and of Ba~(2+) at the interface are facilitated by 18-Crown-6 present in the aqueous phase and the peak current is directly proportional to the concentration of 18-Crown-6 in water. This method can be used for the determination of the complexing agent and for the stability constant of the complex formed in the aqueous phase.All the experimental results are in keeping with the theoretical.     

济源凹陷油源追踪及烃类垂直运移作用

济源凹陷为一中、新生代复合型断陷．下第三系原油为轻质、低硫原油，与下伏中生界（Ｔｔ－Ｊ２）湖沼相生油岩抽提物具有同源性，而与下第三系泥岩抽提物回然相异。后邓断裂是烃类垂直运移的良好通道，中生界生成的烃类沿断裂经过了约３０００－４０００ｍ的垂直运移而聚集成芷。长距离的垂直运移造成了原油中ｒ－蜡烷的富集，作为运移通道的断裂发育时间、规模等控制了浅层油芷的分布．