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简介:Thecross-Straitrelationshaveaccomplishedhistoricaltransition,andthusenteredintoaneraofpeacefuldevelopment.The'Taiwan-relateddiplomacy',alongwithitsimplementation,isincreasinglystrengtheningitsleadingroleandbearingfruitsintheprocessofexchanges,therebycreatingafavorableinternationalatmosphereforthepeacefuldevelopmentofcross-Straitrelationsandtheconsolidationofthe'oneChinaconfiguration'.
简介:The20^ctcenturyiscomingtoacloseandthe21^ctcenturyapproaching.Atthejuncturewhenthetwocenturiesintersecteachother,thequestionofwarandpeacestillremainsamatterofparamountconcerntothewholehumanrace.Itcanbesaidthattheworldmilitarysituationin2000servedasalinkbetweenpastandfuture.ItpossessesbothastrongcontinuityreflectingchangesinworldmilitarysituationsincetheendoftheColdWar,aswellasaclearanddefinitefeatureoftransitionshowingpossibletrendsoftheworldmilitarysituationinthe21^ctcentury.
简介:Aerodynamicforcesandpowerrequirementsinforwardflightinabumblebee(Bombusterrestris)werestudiedusingthemethodofcomputationalfluiddynamics.Actualwingkinematicdataoffreeflightwereusedinthestudy(thespeedrangesfrom0m/sto4.5m/s;advanceratiorangesfrom0-0.66).Thebumblebeeemploysthedelayedstallmechanismandthefastpitching-uprotationmechanismtoproduceverticalforceandthrust.Theleading-edgevortexdoesnotshedinthetranslatoryphaseofthehalf-strokesandismuchmoreconcentratedthanthatofthefruitflyinapreviousstudy.Athoveringandlow-speedflight,theverticalforceisproducedbyboththehalf-strokesandiscontributedbywinglift;atmediumandhighspeeds,theverticalforceismainlyproducedduringthedownstrokeandiscontributedbybothwingliftandwingdrag.Atallspeedsthethrustismainlyproducedintheupstrokeandiscontributedbywingdrag.Thepowerrequirementatlowtomediumspeedsisnotverydifferentfromthatofhoveringandisrelativelylargeatthehighestspeed(advanceratio0.66),i.e.thepowercurveisJshaped.Exceptatthehighestflightspeed,storingenergyelasticallycansavepowerupto20%-30%.Atthehighestspeed,becauseofthelargeincreaseofaerodynamictorqueandtheslightdecreaseofinertialtorque(duetothesmallerstrokeamplitudeandstrokefrequencyused),thepowerrequirementisdominatedbyaerodynamicpowerandtheeffectofelasticstorageofenergyonpowerrequirementislimited.
简介:Basedontheknowledgelearningsystemof"self-centered",aclassicalGermanidealistphilosopher,JohannGottliebFichte,describedhisideasofhighereducationindetail,includingthenatureofuniversities,theacademicfreedom,andthemissionofuniversityteachers.Hebelievedthateachuniversity,asaninstitutionwithteachersandstudentsasitscomponentssettingupforthecontinuationofhumanintelligence,shouldalwaysstickto"academicfreedom"."Academicfreedom"isthenatureoftheexistenceofuniversities,andteachersareregardedasinheritorsofsacredideas,communicatorsofacademicknowledge,andguidersofmoraldirections.Theresearchfindingsofthispapercanbeausefulreferencefortheworldwidehighereducationresearch.
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简介:Inordertomeetthedemandsofmodern,information-basedsociety,highereducationinnaturalresourcemanagementneedstobetransformed.Enhancedmobilityofstudentsandstaff,multi-andtransdisciplinaryapproaches,aswellasinnovativeeducationalapproachesarecalledfor.Moreover,theurbancomponentneedstobebetterincorporated,asexemplifiedbytheemergingfieldofurbanforestry.Thispaperrelatestothedevelopmentsinhighereducationwithinthecontextofeducationonurbanforest...