简介：基于在国际软件确定基准点标准组(ISBSG)仓库包含的数据的实验分析，这篇论文基于工程努力论述软件工程计划持续时间模型。持续时间模型为全部数据集并且为为个人计算机开发的工程的子集被造，中间范围并且大型机平台。持续时间模型也为比努力并且为要求努力的超过400人小时的工程的400人小时要求少数的工程被构造。作为第二个独立变量增加分配资源的最大的数字解释持续时间也被分析的实用性。从在功能的功能的尺寸削尖的工程直接造持续时间模型的机会也被调查。电子增补材料这件物品(doi:10.1007/s11390-007-9051-5)的联机版本contatins增补材料，它对授权用户可得到。

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简介：ThispaperintroducesthePKPM-BIMconstructionmanagementplatformanditsapplicationsintheconstructionsecuritymanagement.ThePKPM-BIMplatformisanintegratedmanagementsystemmainlydevelopedforthecontractorstoimplementtheBIM-aidedconstructionmanagement.ApplicationofBIMtechnologywouldbringmanybeneficialchangestothesecuritymanagementinconstruction.

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简介：为杂草的成功理解原因，我们调查了叶建设，和米饭和它的主导的杂草的某些ecophysiological特点的精力充沛的费用。在在所有杂草之中的生理的基础上，CaesuliaaxillarisRoxburgh被发现最严肃，由Echinochloacruss-galliL列在后面。Beauv和EchinochloacolonumL。连接，当时FimbristylismiliaceaeL。Vahl和CyperusiriaL。是稻田的中等杂草。C。axillaris在一个集体基础(1.15g/g)上并且在一个联合起来的区域基础(22.93g/m2)上有最低的叶构造费用(LCC)。比较地更高的特定的叶区域，光合的率，光合的氮使用效率，叶区域比率和叶区域索引提供的C。有进一步的竞争优势的axillaris。低LCC建议杂草比庄稼更高效地利用碳资源并且潜在地在另外的竞争策略viz上花节省的精力。种子生产，生物资源生产和高相对的生长评价，它导致在杂草种子银行的低庄稼产量和增加。

简介：Themethodologyofvisualsimulationforatunnelengineeringconstructionscheduleispresented.Visualizationofsimulationmodel,calculationandresultofconstructionschedulesimulationisrealized,andtheconstructionsimulationandtheresourceoptimizationoftunnelengineeringaremade.Ariskanalysisandadecision-makingmethodoftunnelengineeringconstructionschedulebasedonvisualsimulationarepresented.Furthermore,usingScurvetheoryandschedulemanagementmethod,thereal-timemanagementandcontrolmethodoftunnelengineeringconstructionbasedonvisualsimulationispresented.Theapplicationtothetunnelengineeringconstructionscheduleanalysisandmanagementshowsthefeasibilityandeffectivenessofthemethodpresentedinthispaper.

简介：Thedecisionsconcerningportfolioselectionforarmyengineeringandmanufacturingdevelopmentprojectsdeterminethebenefitofthoseprojectstothecountryconcerned.Projectsaretypicallyselectedbasedonexanteestimatesoffuturereturnvalues,whichareusuallydifficulttospecifyoronlygeneratedafterprojectlaunch.Ascenario-basedapproachispresentedheretoaddresstheproblemofselectingaprojectportfoliounderincompletescenarioinformationandinterdependencyconstraints.Inthefirststage,therelevantdominanceconceptsofscenarioanalysisarestudiedtohandletheincompleteinformation.Then,ascenario-basedprogrammingapproachisproposedtohandletheinterdependenciestoobtaintheprojects,whosereturnvaluesaremulti-criteriawithintervaldata.Finally,anillustrativeexampleofarmyengineeringandmanufacturingdevelopmentshowsthefeasibilityandadvantagesofthescenario-basedmulti-objectiveprogrammingapproach.

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简介：TheErtanHydroelectricProjectislocatedabout40kmnorthfromDukouCityinSichuanProvince,onthelowerreachofYalongRiver,whichisoneofthetributariesofYangtzeRiver.Thedamsitecontrolsadrainageareaof116,400km~2,theannualaver-agerunoffandannualaverageriverdischargeatdamsiteamountto52.9×10~9m~3and1680m~3/secrespectively.Thenormalpoollevelisof1200m,thetotalreservoirstorageandeffectivereservoirstorage

简介：TheSongkeNo.2well(easternhole)(referredtoasWellSK-2),oneofthe"twowellsandfourholes"oftheDeepContinentalScientificDrillingEngineeringProjectintheSongliaoBasin,isinAndaCity,HeilongjiangProvince,andwasofficiallycompletedonMay26,2018.TliescientificgoalsofWellSK-2coverfouraspects:paleoclimateresearch,resourceandenergyexploration,primarygeologicalresearch,anddevelopmentofdeepearthexplorationtechniques.Sincetheofficialcommencementofdrillingin2014,theWellSK-2scientificdrillingengineeringteamhasorganizedandimplementeddrillingforcoring,insitulogging,chemicalanalysisofcoreelements,anddeepstructuralexplorationaroundthewell.Currently,thefollowingpreliminaryscientificresearchprogresshasbeenmade:4334.81minsitucoredatahasbeenobtained;thecentimeter-levelhigh-resolutioncharacterizationofthemostcompleteandcontinuousCretaceouscontinentalstrataeverunearthedhasbeencompleted,andthestandardprofileofcontinentalstratahasbeeninitiallyestablished;theunconventionalnaturalgasresourcesandbasin-typehotdryrocksinthedeepSongliaoBasinwerefoundtohavegoodprospectsforexplorationanddevelopment;theclimaticevolutionaryhistoryoftheCretaceouscontinentalstratawasrebuiltforthefirsttime,coveringhundredsofthousandstomillionsofyears,andthemajoreventsofCretaceousclimatefluctuationshavebeendiscovered;alltheserevealstrongevidenceforthesubductionandaggregationofpaleo-oceanplates,providingatheoreticalbasisforthere-recognitionofthegenesisoftheSongliaoBasinandfordeepearthoilandgasexploration.TheimplementationoftheDeepContinentalScientificDrillingEngineeringProjectintheSongliaoBasinisofgreatsignificanceforexploringthemysteriesoftheEarthandsolvingmajorproblemssuchasthoserelatedtothedeepenergyenvironment.Itisasolidstepalongtheroadof"goingdeepintotheEarth".

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简介：监视任何结构的表演要求批评的点的位置的变化的即时大小。不同技术能被用于这个目的，一个出现优点和劣势。这种技术基于放系统(GPS，GLONASS和未来伽利略)的卫星似乎为长时期结构至少很有希望。GPS特别地提供能与高精确性追踪动态排水量的采样率。它的服务能力独立于大气的条件，温度变化和监视目标的可见性。这篇论文调查双频率GPS接收装置的大小的可靠性和精确性。一台线性电磁的马达沿着一个给定的方向移动一个目标。位置的变化与他们由GPS接收装置记录了的估计相比，其天线位于参考书目标。比较基于足够地长的记录。

简介：主题摘要：加强项目全过程管理，通过科学决策、合规管理、优化建设、严控风险，达到项目实施的预期目标，实现多方共赢。

简介：China’scoastallinestartsattheYaluRiverinLiaoninginthenorthandendsattheBeilunRivermouthinGuangxi.Itis18,000kilometreslongandcrosses11provinces,municipalitiesandautonomousregions,includingLiaoning,Hebei,Tianjin,Shandong,Jiangsu,Shanghai,Zhejiang,Fujian,Guangdong,GuangxiandHainan.In1988,theChinesegovernmentoutlinedtheCoastalProtectionForestSystemConstructionProjectanddefinedthecoastallineof11provincesasthemainconstructionline.Theprojectaimsatdevelopingamulti-functional

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