简介：阐明Delphi中DDE的机制和DDE的会话特性,给出完成DDE的实例.

简介：摘要在计算机技术的迅速发展的前提下,为了加快学校学籍管理,开发一套学籍管理系统迫在眉捷。本系统主要采用Delphi7做为开发工具,应用面向对象的程序设计方法进行开发与设计的。利用其提供的集成开发环境及各种控件，尤其是对数据库的支持完成对数据库的各种操作，达到对学生成绩管理的目的。本系统使用ADO连接数据库Access2003，提出了权限管理模块的具体实现方法，并完成了相关软件的设计任务。最终系统能够完成信息的输入、输出,数据的修改、查询和统计等功能，使用户操作起来简便快捷。

简介：

简介：

简介：

简介：Constructionprojectschedulingisoneofthemostcriticalfactorsforprojectsuccessmeasurement.Notonlyfortheprojectplanningbutforconstructionprocessmanagement,theschedulingisthebasictoolforcommunicationbetweentheownerandtheprojectmanager.Bydevelopingtheschedulebeforetheprojectstarts,theownerknowsinadvancethattheexpectedtimelineoftheproject.Bypreparingconstructionprocessscheduling,theownerandgeneralcontractorcanbettermanagethesubcontractors,sub-tradesprogress,materialsstorageanddeliveries,laborsscheduleandequipmentsetupwhichwilleventuallysavetime,moneyandhassle.Basically,CriticalPathMethod(CPM)iscommonlyusedintheconstructionindustry.CPMisadeterministicmethodthatassumesthatthroughthenetwork,thereisatleastonepaththatdeterminestheprojectdurationandthatthepathisthecriticalpath.CPMdoesnotconsidertheuncertaintyintheactivities;ratheritassumesthateachactivitycanbefinishedinthegivensituation.ProgramEvaluationandReviewTechnique(PERT)isastochastictechniquewhichisbasedontheassumptionthatthedurationofasingleactivitycanbedescribedbyaprobabilitydensityfunction.PERTtakesintoaccounttheuncertaintyduringtheconstructionprocessandhasbeencreatedoutoftheneedtoplan,scheduleandcontrolcomplexprojectswithmanyuncertainties.ThePERTapproachisstatedinsomebooksandpapers,butthereisnodeepinvestigationontheapplicationinthescheduleriskassessment.ThispaperinvestigatesthePERTworkprocessandtakesavaluabletryontheconstructionscheduleriskassessmentbyusingcasestudies.Theutilizationintheestimatetheconstructionliquidateddamagewiththeuncertaintiesisperformed,whichalsocanbeusedintheinsurancecompanytocalculatetheinsurancepremium.

简介：Accordingtothecharacteristicsoftheprimarymaterialsofthebasiclandpriceinthelittletown,theauthorusestheanalysisfunctionofthefiguresandthespacetosetofftherankunit,calculatethenumberoftheunitandranktheland.Themethodandthesystemoftheevaluationofthebasiclandpriceinthelittletown(especiallythelittletownsintheWesternChina)willbeperfect.

简介：

简介：

简介：