简介：

简介：

简介：在2004年奥林匹克赛事中，中国的李婷，孙甜甜取得了中国网球第一个金牌一女子双打冠军。忘记不了当时李婷挥动着她的BABOLAT（百保力）网拍PureDriveZylon360°激动地拥抱着孙甜甜吵闹着，幸福地哭着的情景。

简介：

简介：ＳｈｏｒｔＤｒｉｖｅＭｅｃｈａｎｉｓｍｆｏｒＦａｒａｄａｙＣｕｐ￥ＺｈａｎｇＧｏｎｇＸｉａｎｇ；ＪｉａｎｇＦａｋｕｉａｎｄＬｏｕＭｅｉｌｉｎｇＴｈｅｎｅｗＥＣＲｓｏｕｒｃｅｂｅａｍｌｉｎｅｗｈｉｃｈｉｓｕｎｄｅｒｃｏｎｓｔｒｕｃｔｉｏｎｎｅｅｄｓｔｈ...

简介：ＰｒａｃｔｉｃａｌＤｒｉｖｅａｎｄＰｒｏｔｅｃｔｉｏｎＣｉｒｃｕｉｔｓｆｏｒｔｈｅＩＧＢＴ①ＧＵＨｅｒｏｎｇ，ＺＨＡＮＧＣｈｕｎｊｉａｎｇ，ＬＩＵＹａｎｍｉｎ（ＹａｎｓｈａｎＵｎｉｖｅｒｓｉｔｙ，Ｑｉｎｈｕａｎｇｄａｏ０６６００４，ＣＨＮ）Ａｂｓｔｒ...

简介：Shingledmagneticrecording(SMR)caneffectivelyincreasethecapacityofharddiskdrives(HDDs).HostawareSMR(HA-SMR)isexpectedtobemorepopularthanotherSMRmodelsbecauseofitsbackwardcompatibilityandnewSMR-specificAPIs.However,anHA-SMRdriveoftensuffersperformancedegradationunderwrite-intensiveworkloadsbecauseoffrequentnon-sequentialwritesbufferedinthediskcache.Thenon-sequentialwritesmainlycomefromupdatewrites,smallrandomwritesandout-of-orderwrites.Inthispaper,weproposeahybridstoragesystemcalledROCOwhichaimstouseasolidstatedrive(SSD)cachetoimprovetheperformanceofanHA-SMRdrive.ROCOreordersout-of-orderwritesbelongingtothesamezoneandusestheSSDcachetoabsorbupdatewritesandsmallrandomwrites.WealsodesignadatareplacementalgorithmcalledCREAfortheSSDcache.CREAfirstconductszone-orientedhot/colddataidentificationtoidentifycold-cachedzonesandhot-cachedzones,andthenevictsdatablocksbelongingtocolderzoneswithhigherprioritiesthatcanbesequentiallywrittenorwrittenthroughhost-sideread-modify-writeoperations.Itgivesthelowestprioritytodatablocksbelongingtothehottest-cachedzonethathavetobenon-sequentiallywritten.ExperimentalresultsshowthatROCOcaneffectivelyreducenon-sequentialwritestotheHA-SMRdriveandimprovetheperformanceoftheHA-SMRdrive.

简介：

简介：1.REPermanentMaterialsChinesedemandforREpermanentmagnetsincreasesat20%peryear.TheoutputofsinteredNdFeBmagnetswillreach70,000tonsin2010,75%oftheworldtotal,withsalesvalueofRMB$26billion.2.RECatalystMaterials

简介：

简介：Firms’transformationfrompassiveenvrionmentalmanagementtoactiveenvironmentalmanagementisthekeytosolvingenvironmentalproblems.Thispaperempiricallystudiestheimpactofenvironmentalmanagementincen-tivesonenvironmentalmanagementthroughmodelconstruction.BasedonthedataandrealityofChina,wecanbuildaconceptmodelofenvironmentalmanagementdrivingmechanism,andputforwardtheoreticalhypothesisthatcanbetested:takethe13environmentalmanagementbehaviors(EMBs)assubstituteofthecomprehensiveness,introducecountingvariables,anduseNBmodel,PossionModelandOrderedProbitmodeltheregressionanalysis.ThetheoryandmethodsbroughtforwardinthispaperwillprovidereferencesforfirmsinChinatofurtherimplementvoluntaryenvironmentalmanagement,andofferadvisesandcountermeasuresforleaderstoimplementenvironmentalmanage-menteffectively.

简介：

简介：IntheMetalsIndustry,interruption-freeprocessestoproducehigh-qualityendproductsareaprerequisite.Themaindrivestogetherwiththemillstandsplayakeyroleinthesuccessofrollingmills.Thecrucialdemandsplacedonthedrivesystemare:high-dynamicperformanceofdriveanditscontrolsystem,abilitytohandletheprocessrelatedoverloads,smoothrunning,highavailability,highefficiency,easyserviceabilityandabilitytointegrateseamlesslywiththeautomationsystems.WithnumerousreferenceinstallationsandmanyyearsofexperienceSiemensVAIhasthewiderexpertiseandtheportfoliotoprovidetherightdriveforeveryapplication.Thispaperexaminesthelatestinnovation,SINAMICSdrivetechnology,forbothnewdriveapplicationsaswellasformodernizingtheexistingdrivesinrollingmillapplicationslikehotstripsmills,platemills,coldrollingmills,andlongrollingmills.

简介：Commercializedcapsule-typeendoscopesmovepassivelybyperistalticwaves(andgravity),whichmakesitdifficultfordoctorstodiagnosetheareasofinterestmorethoroughlyandactively.Toresolvethisproblemofpassivity,itisnecessarytofindaspeciallocomotionprinciple,whichfitsthegastrointestinal(GI)tract.Inthispaper,aleggedlocomotivemechanismwithshapememoryalloy(SMA)actuationbasedontheperistalticprincipleisproposed,andthenthestructureofthelocomotionmechanismisintroduced.Basedonthepreliminaryresults,thedesign,modeling,andfabricationofanSMAmicroactuationconceptforapplicationinanendoscopiccapsulearegiven,aswellastheSMAspringandleggedcomponentdesign,whichisthecoresectionofthesystemdesign.Weusedthepseudo-rigid-bodymodel(PRBM)toanalyzenonlinearandlargedeflectionsoftheSMAleggedcomponent.Thus,aprototypeendoscopewithanSMAspringandsixleggedcomponentswasdesignedandfabricated.Itis15mmindiameterand33mmintotallength,withahollowspacetohouseotherpartsneededforendoscopysuchasacamera,aradiofrequency(RF)module,andsensors.Duringtesting,thelocomotivemechanismwaseffectiveinaplastictubeenvironment.

简介：MrJenkinslivesinatown.Heworksina1.Therearealotofoldwonderfulthingsinit.Helikeshisworkandoftengoestohisofficeontime.

简介：

简介：Theweaknonlinearmodulationofthesurfacewaveofathree-dimensionalimcompressiblefluidwithoutrotation,whichiscontainedinarectangulartroughisstudiedbyusingthemethodofmulti-plescalesperturbationtheory.Theeffectsofviscidandexternaldriveonthemotion,whichmodifiestheLarraza-Puttermanequation,areconsidered.TheresultsareconsistentwiththatofMiles.

简介：TheablativeRichtmyer–Meshkovinstability(ARMI)iscrucialtothesuccessfulignitionimplosionoftheinertialconfinementfusion(ICF)becauseofitsactionastheseedoftheRayleigh–Taylorinstability.InusualICFimplosions,thefirstshockdrivenbyvariousfootsofthepulsesplaysacentralroleintheARMIgrowth.WeproposeanewschemeforrefrainingfromARMIwithapulseofsuccessivepickets.Withthesuccessive-picketpulsedesign,arippledcapsulesurfaceiscompressedbythreesuccessiveshockswithsequentiallystrengtheningintensitiesandablatedstabilization,andtheablativeRichtmyer–Meshkovgrowthismitigatedquiteeffectively.Ournumericalsimulationsandtheoreticalanalysesidentifythevalidityofthisscheme.

简介：Ofthe17rareearthelements(REEs),somehaveprovenrarerthanothers.Neodymiumandpraseodymium(NdPr),twometalsinstrumentaltotherapidlyexpandinggreenenergyandelectricvehicle(EV)sectors,sawthegreatestdemandandpricemovementin2018.Demandforthemetals,whichareusedtomakehigh-strengthmagnetsforwindturbinesandEVengines,isexpectedtogrowasmoreEVsaremanufacturedandasclean-energystrategiesareadopted.

简介：一片片美丽、壮观而又肃穆的天地;一个个仿如与世隔绝的村庄与山峦。世间的喧嚣与浮华被关在一扇无形的大门之外。物欲横流让它们停留在世间的边缘,我们驾驶着别克君越混合动力车,去到别人去不了的地方,开启一条纯净之旅。因为纯净,所以能够听到莲花开放的声音,那是真实,是每个人内心的真相。