简介:<正>OneofthemandatesItriedtoembracewhenIwaspresidentoftheInternationalSocietyofBiomechanics(2007-2009)wastofoster,encourage,andbringtothelimelight,theresearchactivitiesfromcountriesthatwereunderrepresentedinternationally.Irealizedthatsuchunderrepresentationwasoftentheresultofbarriersbetweenscientificcommunitiesthathadevolvedhistorically,basedonbackground,language,scientificmethod,financialsupportetc.,barriersthatcouldeasilybeovercomebypersonalcontacts,acknowledgementof
简介:Managementoftheunderstorylandisaneconomicformtodevelopcultivationandbreedinginmakinguseoftheforestecologicalenvironment.Itisalsoanimportantmeanstoincreasetheincomeofforestfarmersintheforestryregionsafterthereformofforestryrealrights.Thispaperinvestigatedthemanagementstatusofunderstoryland,andanalyzedtheimpactsanddestructionofitsimpropermanagementupontheforestecologyenvironment.Themanagementrightoftheunderstorylandisarestrictedrightofproperty,becausethemanagementisrelatedtotheecologyprotectionofforestandwoodland.Inadditiontoprivatepropertyrights,itshouldalsocomplywiththearrangementofnationalforestmanagement.Therefore,whileencouraginganddevelopingtheunderstorylandmanagement,it’simportanttoestablishalegalsystemforexecutingthemanagementrights,andthemanagementoftheunderstorylandshouldbeincludedinthescopeoftheforestrymanagement.
简介:Accordingtothedifferentelderlycare-givers,wedividedelderlycareintofivemodels.Theyarerelative-care-givermodel,friend-care-givermodel,volunteer-care-givermodel,market-supply-caremodelandwelfaremodel.WithanalysisofthesamplesurveyaboutelderlycareinruralHubeiProvince,wefindthattherearesomeseriousproblemsaboutdailycarefortheoldpeople,suchassingleelderlycaremodel,ahugegapofdemandandsupplyofdailycareforoldpeople,anddeterioratingelderlycareproblem.Thecausesoftheproblemsaretheweakeningoffamilysupportfortheold,theinsufficientofwelfaremodelandmarket-supply-caremodel.Tosolvetheproblems,theformalsupportfortheoldpeopleshouldbeincreased,andthefunctionofmarketshouldbestrengthened.Atthesametime,familysupportshouldcontinuetoplayanimportantroleintheelderlycare.
简介:ThecoreissueforChinatransitiondevelopmentinthenext30yearsistoshiftfromthequantitygrowthmodeltothequalityimprovementmodel.Thepaperintroducestheresearchprogressinthreekeyareasofsustainabledevelopmentstudiessincethe1990s.Itispointedoutthatthereisawell-beingthresh-oldatwhichthemarginutilityofeconomicgrowthforhumanwell-beingwilldecline,thatthereisanecologicallimitbeyondwhichmoreeconomicgrowthintermsofphysicalscalewillbeimpossible,andthatthecreationofhumanwell-beingisrelatednotonlytotheamountbutalsotothestructureandefficiencyofpublicexpenditurefromgovernment.Afteranin-depthdiscussiononfacts,originsandpolicyimplicationsofeachissue,sometheoryandpolicythinkingwithlong-lastingsignificanceareraisedforthetransitiondevelopmentofChina.
简介:目的探讨正电子发射计算机断层显像/计算机体层扫描仪(PET/CT)性能检测过程中18F的放射性活度及活度浓度准确使用量。方法按照NEMANU2-2001标准,采用其相关模体,结合飞利浦Gemini系列,GEDiscovery系列和西门子Biograph系列PET/CT性能检测项目所使用18F的放射性活度或放射性活度浓度进行分析。结果①空间分辨率:飞利浦1.48~2.22GBq/ml;GE〉185MBq/ml;西门子1.11GBq/ml);②散射因子、计数丢失和随机符合测量及精确性(计数丢失和随机符合校正):飞利浦481~555MBq;GE900MBq;西门子1.07GBq;③灵敏度:飞利浦7.4MBq;GE10MBq;西门子4.6MBq。结论各厂商提供的放射性活度及活度浓度可用于NEMA标准检测。