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简介：Wepresentahighlyefficientmethodofgeneratingandshapingellipseperfectvectorbeams(EPVBs)withaprescribedellipseintensityprofileandcontinuouslyvariantlinearpolarizationstate.Theschemeisbasedonthecoaxialsuperpositionoftwoorthogonallypolarizedellipselaserbeamsofcontrollablephasevortexservingasthebasevectorcomponents.Thephase-onlycomputer-generatedhologramisspecificallydesignedbymeansofamodifiediterationalgorithminvolvingacomplexamplitudeconstraint,whichisabletogenerateanEPVBwithhighdiffractionefficiencyinthevectoropticalfieldgenerator.WeexperimentallydemonstratethattheefficiencyofgeneratingtheEPVBhasanotableimprovementfrom1.83%intheconventionalcomplexamplitudemodulationbasedtechniqueto11.1%inourmethod.WealsodiscussanddemonstratethesimultaneousshapingofmultipleEPVBswithindependenttunableellipticityandpolarizationvortexinbothtransversal(2D)andaxial(3D)focusingstructures,provingpotentialsinavarietyofpolarization-mediatedapplicationssuchastrappingandtransportationofparticlesinmorecomplexgeometriccircumstances.

简介：ThispaperanalyzesthegovernmentcontrolofbuildingenergyefficiencyinChinafromtheaspectsofpoliciesandregulations,technicalstandards,pilotdemonstrationprojectsandeconomicmeans,andexpoundsthecharacteristicsandproblemsofgovernmentregulationpracticeinChina.Itisfoundthatthegovernmentregulationofbuildingenergyconservationinourcountryhassomeproblems,suchasimperfectsystem,weakincentivepolicy,imperfectmanagementsystem,andthelackofpublicparticipation.Throughthedeepanalysisoftheexistingproblems,itispointedoutthatthefundamentalreasonforthepooroperationofChina’sbuildingenergyefficiencymarketliesinthelackofunderstandingofthebuildingenergyefficiencymarket,thelackofgovernmentadministrativefunctionsandtheweakconsciousnessofthemainbody.

简介：BasedonthedataofthebestMBArankinginChinaselectedbyManagerMagazine,DEAandMalmquistindexwereusedtoevaluatetheefficiencyofMBAprogramsoftop25businessschoolsinChina.TheresultsshowthattheoverallMBAprogramshaveahighvalueontechnicalefficiencyduetothehighpuretechnicalefficiencyandscaleefficiency.Asthetechnicalregressdeepened,thetotalfactorproductivityofMBAprogrampresentsadroppedtendency.TheresultsofANOVAshowthatthelocation,typeandinternationalcertificationhavenosignificanteffectontheefficiency.Accordingtothecrossanalysisoftechnicalefficiencyandtotalfactorproductivity,differentbusinessschoolsshouldadoptdifferentdevelopmentstrategies.

简介：UnliketheEuropeanUnionemissiontradesystem(EUETS),ChinaspilotETSsimplementeddiversifiedpolicydesignsinsteadofusingauniformframework.VarianceratiotestisusedtoevaluatetheEfficientMarketHypothesis(EMH)inChina’scarbontradingmarkets.TheresultsoftwoversionsofvarianceratiotestsindicatethatthecarbontradingmarketinHubeiisconsideredweakformefficient,andthesocialistmarketeconomydoesnotnecessarilyleadtomarketinefficiencyincarbontradingmarkets.ThintradingactivitiesgeneratemarketfrictionsandbiastheEfficientMarketHypothesis(EMH)tests.

简介：TheMinistryofIndustryandInformationTechnologyandtheMinistryofNaturalResourceshaverecentlyissuedthesecondbatchofrareearthmining&productionquotastothesixrareearthgroups(45,000tonsofrareearthsmeltingandseparationproductsand46,500tonsofmineralproducts).Accordingtothenotice,thegovernmentstrictlycontrolsoverallamountofrareearthmining,smeltingandseparationproducts.Thetotalamountofrareearthmining,smeltingandseparationcontrolplansfor2018are120,000tonsand115,000tons,respectively.

简介：Duringeccentriccontractions,muscularforceproductioncapacityisenhancedcomparedtoisometriccontractions.Althoughthisiswellacceptedintermsofmusclemechanics,maximalvoluntaryeccentriccontractionsareassociatedwithneuralinhibitionthatpreventsincreasedforceproductionofinvivohumanmuscles.However,becauseitwasshownthatmaximalvoluntaryeccentricforcescanexceedmaximumisometricforcesbyafactorof1.2-1.4,thisreviewfocusesonthequestionofwhethertheabsenteccentricforceenhancement,asobservedinmanystudies,canunambiguouslybeattributedtoaninherentneuralinhibition.First,wedemonstratethatparticipantfamiliarization,preload,andfasciclebehaviorarecrucialfactorsinfluencingmaximalvoluntaryeccentricforceproduction.Second,weshowthatmusclemechanicssuchasmusclelength,lengtheningvelocity,andstretchamplitudeinteractwhenitcomestomaximalvoluntaryeccentricforceproduction.Finally,wediscussthedivergingfindingsonneuralinhibitionduringmaximalvoluntaryeccentriccontractions.Becausetherewasnoinhibitionofthemajormotorpathwaysinthepresenceofenhancedmaximalvoluntaryeccentricforces,furtherresearchisneededtotesttheconceptofneuralinhibitionandtounderstandwhymaximalvoluntaryforceproductionisreducedcomparedtotheforcecapacityofisolatedmusclepreparations.

简介：在在精力的反应关上到库仑障碍的multinucleon转移的主要进步被考察。在试验性的进步和理论进步的一个短演讲以后，为未知充满中子的重原子核和trans铀原子核的预言的生产十字节被介绍。

简介：服务器的差的精力比例为现代数据中心的低精力效率被看作主要来源。我们发现一个应用程序的不同资源配置导致类似的性能，但是有不同精力消费。当表演等价物资源配置(PERC)，和它的性能范围被称为相等的区域，我们叫这现象(嗯)。基于PERC，为改进精力效率的一个基本想法是为每应用从PERC选择最有效的配置。然而，当几千个应用程序在围住资源的服务器上同时被运行时，获得最佳的答案不能支持每个应用程序。这里，我们建议一个启发式的计划，CPicker，基于基因编程到改进服务者的精力效率。加快集中，CPicker由首先从有高精力的区域选择配置初始化一张高质量的人口变化。试验CPicker与神谕盒子相比与贪婪途径，和不到4%效率损失相比在17%精力效率改进上面获得的表演。

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简介：Naturalgashydrates(NGH)isoneofkeyfuturecleanenergyresources.Itsindustrializeddevelopmentwillhelpremitthehugedemandofglobalnaturalgas,relievetheincreasingpressureoftheenvironment,andplayavitalroleinthegreensustainablegrowthofhumansocieties.Basedonnearlytwodecades'studyingonthereservoircharacteristicsintheSouthChinaSea(SCS)andtheknowledgeofreservoirsystem,theChinaGeologicalSurvey(CGS)conductedthefirstproductiontestonanoptimaltargetselectedinShenhuareaSCSin2017.Guidedbythe"three-phasecontrol"exploitationtheorywhichfocusedonformationstabilization,technologiessuchasformationfluidextraction,welldrillingandcompleting,reservoirstimulating,sandcontrolling,environmentalmonitoring,monitoringandpreventingofsecondaryformationofhydrateswereapplied.Thetestlastedfor60daysfromMay10^thwhenstartingtopump,droppressureandignitetowellkillingonJuly9^th,withgasproductionof3.09×10^5m^3intotal,whichisaworldrecordwiththelongestcontinuousdurationofgasproductionandmaximalgasyield.ThissuccessfultestbringsasignificantbreakthroughonsafetycontrolofNGHproduction.

简介：Today,manydevelopingcountriesarefacingsevereshortageofelectricityproductionintheireconomieswhichresultsintoawideninggapbetweenelectricityproductionandconsumption.Thispaperemploysthree-stepmethodologyofUnitRoot,JohansenCointegration,andVectorErrorCorrectionMechanismtoexaminewhetherthereexistsshort-,long-run,uni-,orbi-directionalcausalityamongeconomicgrowth,electricityproduction,andinflationforthreeSouthAsianeconomiesnamely,India,Pakistan,andBangladeshcoveringtheperiod1973-2014.ThispaperfindstheneutralityhypothesisintheshortrunforIndia,Pakistan,andBangladesh.Forthelongrun,thetestresultindicatesthatdifferenthypothesisexistsforthethreecountriesundertheanalysis.Thisimpliesthatpoliciesandstrategiesforincreasingtheinstalledcapacityofelectricitygenerationcanleadtowardsprosperouseconomicgrowthinthelongrun.

简介：四新triterpenesaponins，和五已知的混合物(5-9)，mandshunosidesF-I(1-4)从铁线莲mandshurica的根和根茎被孤立。他们的结构根据分光镜的证据和水解作用产品被阐明。Bisdesmosidicsaponin(3-9)在51.3%-的范围与抑制比率显示出没有生产的谦虚抑制64.6%在50摩尔

简介：GreenhousehorticulturalproductioncurrentlyrepresentsanimportantandgrowdngsectorofCanada'sfoodandplantproducproductionsystems.Since2006,thevalueofgreenhousevegetablecropsinCanadaexceedsthatoffieldgrowncrops,signalinganimportantshiftinthew-ayfoodiscultivatedinthecountry.Whilemanyfactorshavecontributedtothischange,amajorareaofinnovationincludesthediscoveriesandadvancesmadeinthedevelopmentofcommercialgreenhouseproductionsystemsaswellastheintegrationofbiologicalcontrolstrategiesforsustainablepestmanagement.Withthisfocus,thisreviewoffersabriefoverviewoftheCanadiangreenhouseindustry,includingadescriptivelistofcommonlyusedbiologicalcontrolorganisms,aswellastheroleCanadianresearchhasplayedinthedevelopmentoftheseagents.WealsoaddressthethreatsthatCanadiangreenhouseproducersfacebyinvasivepestsandthecomplicationsthesehavecreatedforthecommercializationofnovelbiologicalcontrolagents.Thisinformationmayserveasaguideforthedevelopmentofparalleltechnologiesandtoolsinotherpartsoftheworldwheregreenhouseproductionisexpanding.

简介：1.ObjectivesAsabout99%ofthenaturalgashydrate(NGH)resourcesarestoredontheseafloor,itisinevitablethatinitsprocessofexplorationandproduction,therewillbegeohazardssuchasmethaneleakage,seabedsubsidence,ecosystemdamageandevenlandslide.Therefore,asetofintegratedsystemsforenvironmentalmonitoringintheprocessofNGHproductionhasbeenproposedintheconsiderationofenvironmentaldisastersthatmayariseintheprocessofhydrateproduction.

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简介：Wepresentthedesignandexperimentofabroadbandopticalparametricchirped-pulseamplifier(OPCPA)whichprovideshighconversionefficiencyandgoodbeamqualityat808nmwavelength.Usingathree-dimensionalspatialandtemporalnumericalmodel,severaldesignconsiderationsnecessarytoachievehighconversionefficiency,goodbeamqualityandgoodoutputstabilityarediscussed.Toimprovetheconversionefficiencyandbroadentheamplifiedsignalbandwidthsimultaneously,thenonlinearcrystallengthandOPCPAparametersareanalyzedandoptimizedwiththeconceptofdissipatingamplifiedidlerbetweenopticalparametricamplification(OPA)oftwocrystalsconfiguration.Intheexperiment,anamplifierconsistingoftwoOPCPAstagesof‘L’typeconfigurationwasdemonstratedbyusingtheoptimizedparameters.Anamplifiedsignalenergyof160mJwasachievedwithatotalpump-to-signalefficiencyof35%(43%efficiencyfortheOPCPAstage2).Theoutputbandwidthofsignalpulsereached80nmandthesignalpulsewascompressedto24fs.Theenergystabilityreached1.67%RMSat3%pumpenergyvariation.TheoptimizedOPCPAamplifieroperatesatarepetitionrateof1Hzandisusedasafront-endinjectionforthemainamplifierofSG-II5PWlaserfacility.