简介：连续时间的Markowitz的吝啬变化的有效策略被parameterizing修改批评数量。这些parameterizedMarkowitz策略能与任意地高的可能性到达原来的吝啬的目标，这被显示出。接着，每当parameterizedMarkowitz策略到达吝啬的目标的现在的价值时，这激发股票资源被清偿的某些停止的策略的介绍。修订Markowitz策略的风险方面从起始的预算经由期望的打折的损失被检验。一个新公事包选择模型基于纸的结果被建议。

简介：　　这个投资策略迫使投资者在股市下滑时离场,　　投资于股票的款额 = m x （现有财富－不愿承担风险的财富） 　　m将高过1 　　举例说,他在股市的投资会减至72元

简介：对于长期处于中文环境中的英语学习者来说，要拥有高水平的英语听说能力确实非常难。本文作者NickStirk在此介绍了一套很好的方法，希望能对大家有所帮助。

简介：

简介：ThisstudyfocusesoninventorystrategiesofInternetretailers(etailers).Theetailerfacesoptionsofholdingherowninventoryoroutsourcingthroughthethirdparty(ies).Weassessetailerinventorystrategiesthroughmathematicalmodelingandnumericalexperiments.Whenorderingandholdingherownstock,theetailerhasfullcontroloftheorderfulfillmentprocessbutbearstheinventory-relatedrisk.Whenoutsourcingstock,etailer'sordersmaynotgetanequalpriorityasforthoseofthethirdparty'sown.Builtuponsimpleoperationsresearchmodels,thenumericalexperimentssuggestthattheetailerisbetteroffrelyingonotherstofulfillordersifherdemand(profitmargin)islow,butshouldreverttothestrategyofmaintainingherowninventoryifhersalesvolume(profitmargin)isrelativelyhigh.Otherfactorsarealsoinvestigated.Thesefindingsseemtoconfirmwhatarebeingpracticedintheindustry.

简介：投资股票的策略,他在股市的投资会减至72元,initially put $60 in savings (60%) and $40 in stocks (40%).

简介：

简介：

简介：China'snationalsustainabledevelopmentstrategiesweredraftedundertheguidanceofDengXiaoping'stheoryonsocialistconstructionwithChinesedistinguishingfeaturesand,thetheoryandpracticeofsustainabledevelopmenthasfurtherenrichedandperfectedDengXiaoping'stheory.Anin-depthstudyofDengXiaoping'stheoryissignificantifwearetoaccuratelyunderstandoursustainabledevelopmentprogramandhowtobestimplementthestrategies.

简介：

简介：本文首先介绍了中国土地荒漠化现状及其成因．提出了中国在防治荒漠化工作中所采取的主要战略措施，其中包括：（１）通过大众传媒加强荒漠化防治的宣传与教育力度；（２）加强法制教育和执法力度，进一步完善各项法律、法规；（３）通过加强先进科学技术推广与人员培训，促进荒漠化防治工作、巩固成效；（４）制定优先政策，加大投资力度，促进荒漠化防治工作的大力发展．最后，本文介绍了中国荒漠化防治的最新进展．

简介：

简介：AbstractChronic wounds have always been a tough fight in clinical practice, which can not only make patients suffer from pain physically and mentally but also impose a heavy burden on the society. More than one factor is relevant to each step of the development of chronic wounds. Along with the in-depth research, we have realized that figuring out the pathophysiological mechanism of chronic wounds is the foundation of treatment, while wound infection is the key point concerned. The cause of infection should be identified and prevented promptly once diagnosed. This paper mainly describes the mechanism, diagnosis and therapeutic strategies of chronic wound infection, and will put an emphasis on the principle of debridement.

简介：无

简介：Thispaperpresentsabidmodelwhichcanbereadilyimplementedinacompetitivebidenvironmentwithintheconstructionindustry.Competitivebidsituationsinvolveamultiplicityofcriteria.Inthispaper,31criteria,whicheffectoptimumestimation,areconsidered.ThemodelisbasedonCBR,thedatabaseofpastcompletedbids,andinformationassociatedwithsuccessfulbids.CBRisconsideredthebestmethodbecauseofthecomplexityoftheconstructiondomainandthewealthofinformationthatthecontractorspossessedonpastbids.

简介：Buildingecocitiesbecomesanobjectiverequirementforsustainabledevelopment.Thisarticlediscussestherelationshipbetweensustainabledevelopmentandsustainableurbandevelopment.Onthebasisofdiscussingthesigificanceofsustainableurbandevelopmentandthatofaneco-cityfromdifferentperspectives,itsuggestsseveralmanagementstrategiesfordevelopinganeco-city,adesirablesustainableurbanmodel.

简介：ＴｈｅＮａｉｒｏｂｉＦｏｒｗａｒｄ－ＬｏｏｋｉｎｇＳｔｒａｔｅｇｉｅｓ￥／／ＯｎｅｏｆｔｈｅＮａｉｒｏｂｉＳｔｒａｔｅｇｉｅｓ，Ｐａｒａｇｒａｐｈ１５６ｆｒｏｍｔｈｅＮａｉｒｏｂｉｓｔｒａｔｅｇｉｅｓｉｓｅｓｐｅｃｉａｌｌｙｒｅｌｅｖａｎｔｔｏｔｈｅ...

简介：

简介：

简介：Objective:Toprobeintoeffectivesurgicalproceduresandimprovetheoutcomeoftreatmentforpatientswithseverehepaticinjury.Methods:Aretrospectivestudyinvolving113patientswithseverehepatictrauma(AASTgradeIVandV)duringthepast12yearswascarriedout.Ninety-eightpatientsunderwentsurgicaltreatment.SurgicalinterventionsincludinghepatectomyordirectcontrolofbleedingvesselsbyfingerfracturetechniquewithPringlemaneuver,selectiveligationofhepaticartery,retrohepaticcavalrepairwithtotalhepaticvascularocclusion,andperihepaticpackingweremainlyused.Results:Inthe98patientstreatedoperatively,thesurvivalratewas69.4%(68/98).Among40patientswithjuxtahepaticvenousinjury(JHVI),15werecuredwiththemaximumbloodtransfusionof12000ml.EightcasesofGradeIVinjurytreatednonoperativelywerecured.Thepercentageoffailureofnonoperativemanagementwas42.9%(6/14).Theoverallmortalityratewas32.7%(37/113),and57%ofthedeathswereduetoexsanguination.Conclusions:Reasonablesurgicalproceduresbasedonclassificationofhepaticinjuriescanincreasethesurvivalrateofseverelivertrauma.AccurateperihepaticpackingiseffectiveindealingwithJHVI.