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简介:Intheair-waterquantumkeydistribution(QKD),theirregularseasurfacehassomeinfluenceonthephotonpolariza-tionstate.Thewindisconsideredasthemainfactorcausingtheirregularity,sothemodelofirregularseasurfacebasedonthewindspeedisadopted.Therelationshipsofthequantumbiterrorratewiththewindspeedandtheinitialincidentanglearesimulated.Therefore,themaximumsecuretransmissiondepthofQKDisconfirmed,andthelimita-tionofthewindspeedandtheinitialincidentangleisdetermined.Thesimulationresultsshowthatwhenthewindspeedandtheinitialincidentangleincrease,theperformanceofQKDwillfalldown.Undertheintercept-resendattackcondition,themaximumsafetransmissiondepthofQKDisupto105m.Torealizesafecommunicationsinthesafedivingdepthofsubmarines(100m),theinitialincidentangleisrequestedtobenotexceeding26~,andwiththeinitialincidentan~leincreased,thelimitationofwindspeedisdecreased.
简介:AbstractIn order to effectively implement the Tianjin Biosecurity Guidelines for Codes of Conduct for Scientists, biosecurity awareness-raising and education are essential because if these are not in place scientists will not understand the need for biosecurity codes of conduct. In an effort to assist in the implementation of the guidelines, a small-scale survey was carried out in early 2022 of biosecurity awareness-raising and education projects that have been developed over the last two decades to discover what resources and experience have been accumulated. It is argued that the survey demonstrates that much of what is needed to implement the guidelines effectively has been developed, but that there are specific deficiencies that need to be remedied quickly. In particular, an updated teaching resource covering the core issues related to the Biological and Toxin Weapons Convention (BTWC) and the problem of dual use in scientific research needs to be made widely available and translated into at least the six official United Nations (UN) languages. Additionally, more specialists from the Humanities with expertise in ethics need to become involved in biosecurity awareness-raising and education activities. While advantage should be taken now of the available national, regional and international networks of people involved in related activities, it is suggested that in the longer term cooperation in biosecurity awareness-raising and education will benefit from the development of an equivalent organisation to the International Nuclear Security Education Network (INSEN) organised through the International Atomic Energy Agency (IAEA).
简介:Researchonnewtypesofcastables,pre-castassemblypartsandthermalinsulationmaterialswithgoodresistancetowear,thermalshockanderosion,andlowthermalconductivity,wasdonetosolveproblemsofhighsystemenergyconsumption,crackingandspallingofpartialliningandmismatchoffurnacetopmaterialandhangingmaterialandsoon,causedbyunreasonabledesignofChina'sAl(OH)3dilutephasefluidizedbedroastingfurnacelining.Severaldifficultproblemssuchasthematchingofdifferentmaterials,preservationofexpansionjointsamongdifferentzonesandreasonablemechanicaldistributionofliningweresolved.'Integratedfurnace'conceptwasestablishedincludingrefractoriesR&D,liningstructuredesign,constructionoptimization,furnacewarmingtechnology,initialoperationandliningmaintenancetechnology.Thekeytechnologiesofhigh-efficiencyandenergy-savingforfurnacesweredeveloped.TheseachievementshavebeenappliedtoChina'sAl(OH)3dilutephasefluidizedbedroastingfurnacestoreduceenergyconsumptionby1000MJpertonalumina,enhancethecapacityandreducetheexhaustgasemission.
简介:DuringtheEighthFive-YearPlanperiod,ShaanxiProvinceintensifiedtherestructuringofinvestmentandmacro-controlinfixedassetsinvestmentbyimplementingthepolicyof"limitingtotalamount,readjustingstructure,rectifyingorderandimprovingefficiency".ThewholeprovincerealizedRMB110billioninfixedassetsinvestment,(includingRMB86.5billionbystate-ownedunits,RMB14.23billionthroughloansfromtheconstructionbank,makingup16.5percent),RMB67billionmorethanintheSeventhFive-YearPlanperiod,withanannualincreaseof26.5percent.Thankstothesupport,agroupofmedium-to-largeandkeyprojectshavebeenputinto
简介:SPSS13.0wasusedtoprocessthedataofthe1-6batchofkeyculturalrelicconservationunitspromulgatedbytheStateAdministrationofCulturalHeritageofChina;andmulti-elementevaluationmethodwasusedtocalculatethecompositedistributionindex.ThespatialdistributionofculturalrelicsofprovincesinChinacanbedividedintofourgrades,namely:veryrichareas,richareas,poorareasandverypoorareas;thearticleanalyzesthecharacteristicsofculturalresourcesinspatialandtemporaldistribution.Thepaperholdsthat(1)thedistributionofChina'sculturalrelictourismresourcesisrelativelyconcentrated,differentsharplyfromregiontoregion,withmoreHannation'sheritage,lessrelicsoftheethnicminorities;(2)Henan,Hebei,Shaanxi,ShanxiProvincearethemainregionswithheavydistributionofculturalresources;(3)relicsappearedinspecifictimeperiodsinChina'shistory.MingandQingDynasties,Sui,TangandFiveDynasties,Song,LiaoandJin,theWesternHan,ShangandZhoudynasties,theNewStoneAgearethemajorperiodsproducingmoreculturalrelics.Thispaperalsoanalyzesrelationshipsoftheemergenceofculturalrelicswithproductiontechnology,specifichistoricalprocess,specificgeographicallocation,politicalsystem,religion,nationalculture,customs,architecturalstylesandtechniquesofthetraditionalculturaleducationalsystem.Finally,thepaperdiscussesthedevelopmentandprotectionofheritage.
简介:Bystudyingthetraditionalspectralreflectancereconstructionmethod,spectralreflectanceandtherelativespectralpowerdistributionofalightingsourcearesparselydecomposed,andtheorthogonalpropertyoftheprincipalcomponentorthogonalbasisisusedtoeliminatebasis;thenspectralreflectancedataareobtainedbysolvingasparsecoefficient.Aftertheoreticalanalysis,thespectralreflectancereconstructionbasedonsparsepriorknowledgeoftheprincipalcomponentorthogonalbasisbyasingle-pixeldetectoriscarriedoutbysoftwaresimulationandexperiment.Itcanreducethecomplexityandcostofthesystem,andhascertainsignificancefortheimprovementofmultispectralimageacquisitiontechnology.
简介:Withparametricdown-conversionsources(PDCSs),thenonorthogonaldecoystateprotocolbasedononevacuumandtwoweakdecoystatesispresented.ThedetectioneventsonBob'ssidearedividedintotwogroupsdependingonwhetherAlicegetsatriggerornot:triggeredcomponentsandnontriggeredcomponents.Thetriggeredcomponentsareusedtoestimatethefractionsanderrorratesofsingle-photonandtwo-photonpulses,andthenthefinalsecurekeyrateisdeduced.Besides,bothtriggeredandnontriggeredcomponentsareusedtodeduceamoreaccuratevalueofthekeygenerationrate.Thesimulationofthefinalkeygenerationrateovertransmissiondistanceshowsthatthefirstmethodcanobtainakeygenerationrateclosetothetheoreticallimitoftheinfinitedecoystateprotocol,whilethesecondmethodisbetter.
简介:Background:Accelerometershavebeensuggestedtoprovideadditionalinformationduringthe6-minwalktestwhichmaybeusefulinevaluatingchangesinfunctionalexercisecapacity.TheaimofthestudywastoidentifywhethertheadditionalinformationmeasuredbytheMyWellnessKey~(TM)(MWK)accelerometerduringatreadmill6-minwalktest(t-6MWT)wasrelatedtocurrentlyusedoutcomemeasures.Methods:Fifteenparticipants(9males,6females)performedaself-pacedt-6MWT.RespiratorygasanalysisandwalkingdistanceweremeasuredwhilstwearingtheMWK.Results:Asignificantcorrelationwasestablishedbetweenactivitycountsand6-minwalkdistance(6MWD)(r=-0.847,p<0.001)yetnot6-minwalkwork(6MWW)(r=-0.337,p=0.220).EnergyexpenditureestimatedbytheMWKwasstronglycorrelatedto6MWW(r=0.938,p<0.001)butnot6MWD(r=0.477,p=0.072).TheMWKsignificantlyunderestimatedenergyexpenditure(36.73,CI=33.9-39.7kcal)comparedtogasanalysis(54.35,CI=46.2-61.4kcal)demonstratingpooragreementbetweenthetwoanalyses(Bias=-17.61kcal,Limitsofagreement=-37.4,t2.2kcal).Measurementoftimespentundertakinglight,moderate,andvigorousphysicalactivitywasnotsignificantlydifferent(p>0.05)betweentheMWKandgasanalysis.Conclusion:EstimatedenergyexpenditureprovidedbytheMWKwasstronglycorrelatedto6MWW;however,MWKunderestimatedenergyexpenditureasmeasuredbygasanalysis.TheMWKmayprovideoutcomedatathatsupplementthosecurrentlyprovidedbythe6MWDforfunctionalcapacityassessmentduringthet-6MWT.
简介:会计人员的自我约束,即是作为一名会计人员应如何自觉地按照《会计法》的要求和为人民服务的宗旨,自己约束自己,为国家、集体、职工用好权、掌好权。会计人员如何自我约束,笔者认为江泽民同志所倡导的干部要“自重、自省、自警、自励”的四自原则对会计人员是很适用的。所谓自重,就是注重自己的言行,珍惜自已的名誉。会计人员掌握着比一般人更多的管钱管财的特殊权力,这种权力是人民所赋予的,会计人员理应在自己的岗位上发挥一技一能之长。自重是相对于自轻自贱而言的。在改革开放的今天,在拜金主义、享乐主义不良风气袭来的情况下,我们的确看到有些会计人员自轻自贱。比如,有人不能正确对待手中的权力,以权谋私;有人陶醉于外面的花花