简介：AbstractRecently, death from herpes B virus (Cercopithecine Herpesvirus 1) infection was reported in China, reminding us to be alert to the risk of transmission and infection with herpes B virus. Herpes B virus is a zoonotic pathogen that can cause fatal encephalomyelitis in humans. The virus naturally infects rhesus monkeys, causing diseases like human herpes simplex virus (HSV) infection, which are often asymptomatic or mild in the rhesus macaque. However, herpes B virus infection can be fatal to humans. Without timely treatment, the mortality rate of herpes B virus infection is as high as 70%-80%. To date, approximately 50 cases of human herpes B virus (HBV) infection have been reported worldwide. Most cases are related to direct contact with macaques, such as scratching, biting, or mucosal contact with monkey body fluids or secretions. Although the risk of human-to-human transmission is low, the widespread prevalence of the virus among monkeys, the high mortality of infected persons, and the severe neurological sequelae of survivors render this virus an important zoonotic pathogen that threatens human beings. Biorisk-related training programs for at risk personnel and timely treatment after exposure to the B virus can reduce infection rate and mortality. The early initiation of antiviral therapy prevents severe disease or death after the rapid diagnosis of human B virus disease. Identification of risk factors is essential in controlling the spread of the herpes B virus in the population at risk.

简介：

简介：Magneticforcetransmissionofareciprocatingmotionisstudiedbytheoreticalanalysisandexperiment.Amathematicalmodelforcalculatingthemagneticforceisderivedusingthetheoryofequivalentmagneticcharges.Anexperimentalrigisconstructedtotestthetransmissionandthemodelisverifiedbyexperiment.Effectofthetransmissionparametersonthemagneticforceisanalyzedtheoreticallyfromthemodel,andcharacteristicofthetransmissionisstudiedexperimentally.Sincethetransmissioniswithoutdirectcontactbetweentwoelements,itissuitableforapplicationinanorganism.

简介：传播衬里的极端高电压(UHV)的过量电压现象被EMTDC/PSCAD模拟分析并且验证。指理论分析和传播在中国和UHV传播衬里的额外的高电压(EHV)的操作经验在俄国和日本排队，在传播由保护和控制策略衬里的UHV压制内部过量电压的方法被讨论。通过在自动开关，分流反应堆，摔倒并且关门的电阻，和金属氧化物之中的合作变阻器(MOV)，过量电压能在可接受的水平以内被制止。

简介：

简介：AbstractTransmission network analysis is a crucial evaluation tool aiming to explore the characteristics of the human immunodeficiency virus epidemic, develop evidence-based prevention strategies, and contribute to various areas of human immunodeficiency virus/acquired immunodeficiency syndrome prevention and control. Over recent decades, transmission networks have made tremendous strides in terms of modes, methods, applications, and various other aspects. Transmission network methods, including social, sexual, and molecular transmission networks, have played a pivotal role. Each transmission network research method has its advantages, as well as its limitations. In this study, we established a systematic review of these aforementioned transmission networks with respect to their definitions, applications, limitations, recent progress, and synthetic applications.

简介：Toanalyzetheinfluenceof±400kVQinghai-TibetHVDCtransmissionsystemontransmissionlineprotectionsinQinghaiACpowersystem,aclosed-loopsimulationsystemwasconstructedbycombingHyperSimsystemwithHVDCcontrolprotectiondevices.Variousfaultsondouble-circuit750kVandmulticircuit330kVACtransmissionlinesinQinghaipowersystemweresimulated.TheimpedancecharacteristicsandharmoniccomponentsatQinghaisideofQing-TibetDCtransmissionlinewereanalyzed.TheharmonicproportioninvoltagesandcurrentswerestudiedforfaultsthattookplaceatdifferentlocationsneartheDCsystem.TheinflenceofQing-TibetDCsystemonthedirectionalcomponentsofprotections,differentialprotectionsanddistanceprotectionsofACtransmissionlineswasdiscussedanddrewtheconclusionsthattheDCsytemhadlittleinfluenceondifferentialprotections,whilehadgreatinflenceondirectionalcomponentsanddistanceprotection.TheconclusionscanprovidereferenceforstudyingtheinteractionbetweenACandDCsystems.

简介：AbstractThe emerging Babesia venatorum upsurges as a potential health threat occurring in China and other endemic countries. Few attempts to isolate and culture the Babesia species had been conducted in vitro. We collected the questing Ixodes persulcatus from identified endemic areas and allowed them to feed on the severe combined immunodeficiency (SCID) mice. The positive mice were chosen to provide positive erythrocytes with asexual B. venatorum for continuous culture in mouse or human erythrocytes in vitro, with RPMI 1640 medium and appropriate serum. With B. venatorum in the SCID mice, erythrocytes were cultured in vitro for confirmation by morphological observations with transmission electron microscopes. Sequences of B. venatorum were then identified by way of conventional PCR amplification. Parasitemia counts monitored the growth of B. venatorum on thin blood smears and real-time quantitative PCR in parallel. As expected, B. venatorum positive mice were harvested by sufficient attacks of I. persulcatus ticks. The erythrocytes of the infected mice were then inoculated and successfully cultured in donated erythrocytes from humans and mice in RPMI 1640 culture medium. Active growth of B. venatorum was well demonstrated in human erythrocytes with 3.3 times parasite-load when compared with a mouse under similar conditions. With the increased subcultures, a prolonged period of detectable parasitemia with much higher peak parasitemia and shorter time to reach peak parasitemia were observed in the following subcultures. A new strategy for isolation and in vitro culture of B. venatorum has been provided with a continuous supply of sufficient pathogens to satisfy human babesiosis's testings and clinical therapies.

简介：无

简介：1.GeneralreviewThefirst330kVtransmissionlineinNorthwestChinafromLiujiaxiaHydroPowerStationthroughQinanSubstationtoTangyuSubstationwascommissionedin1972.Intheseventies,accompany-ingthecommissioningofHanchengandQinlingThermalPowerPlantsinShaanxiProvince,the330kVtransmissionlinesfrom

简介：ThetransmissioncapacityofMobileAdHocNetworking(MANET)isconstrainedbythemutualinterferenceofconcurrenttransmissionsbetweennodes.First,thetransmissioncapacityofMANETisstudiedbytheviewofinformationflowbetweennodes.Atthesametime,theproblemthattheinterferencebetweennodesaffectsthetransmissioncapacityofMANETisalsostudiedbythetooloftheeventconflictgraph.Secondly,thepaperpresentsthemethodtocomputethemaximumex-pectantachievablecapacityforthegivenconflictgraph,andconcludesandprovesansufficientcon-ditionthattheinformationflowtransmitsuccessfullybetweennodes.Atlast,theresultsaresimulatedandafittingequationoftransmissioncapacitybetweennodesisgiven.

简介：Atheoreticalapproachisderivedtostudyinteractionoflinearwaterwaveswithanairbubblecurtainusedasapneumaticbreakwater.Modellingofwavetransmissionthroughanaerialbarrierisacomplextaskduetoaneedtocoverprocessesassociatedwithwave-currentinteraction,effectsoftwo-phaseflows,wavedamping,etc..Aninitialboundary-valueproblemissolvedbyapplyinganefficienteigenfunctionexpansionmethodandatime-steppingprocedure.Thederivedsemi-analyticalsolutionisusedtostudytheeffectofbasicparametersofthemodelonwavedissipativepropertiesofthepneumaticbreakwater.Resultsshowthatwavedampingbythebreakwaterismainlyaffectedbyanairflowrate.Theincreasedairdischargeresultsinhighervelocitiesofascendingbubblesandincreasesaerialbarrierwidth.Thisleadstoasubstantialreductionoftransmittedwaveheights,especiallyforwavesofintermediatelengthandshortwaves.Inordertoverifytheapplicabilityofthepresentedtheoreticalapproach,laboratoryexperimentsareconductedinawaveflumefordifferentwaveregimesandpneumaticbreakwatercharacteristics.Theanalysisofawavetransmissioncoefficientcalculatednumericallyandmeasuredinthelaboratoryconfirmsthatthederivedmodelcanbeusedforacertainrangeofwaveconditions.

简介：Anewmethodofcodinganddecodinginthesystemofunderwaterimagetransmissionisintroduced,includingtherapiddigitalfrequencysynthesizerinmultiplefrequencyshiftkeying,imagedatagenerator,imagegrayscaledecoderwithintelligentfuzzyalgorithm,imagerestorationanddisplayonmicrocomputer.

简介：ThereflectionandtransmissionofLambwavesatoverlapjointsareresearchedbythenumericalmethodandtheexperiments.ThenumericalmethodisusedtosimulatethereflectionandtransmissionofLambwavesatweldswithdifferentwidthson2mm-thickstainlesssteelplates.Thereflectionandtransmissioncoefficientsarecalculatedaswell.Whentheweldswidthislessthan4mm,aquasi-linearcorrelationisobservedbetweenthereflectioncoefficientofSOmodeandtheweldwidth.Incontrasttotheweldwidth,boththegapbetweentwoplatesandthereinforcementheightofwelddonothaveobviouseffectonthereflectioncoefficient.Basedontheresults,weproposethattheweldwidthcouldberapidlymeasuredthroughexaminingtheechoamplitudeofSOmode.Experimentsfurtherconfirmthequasilinearcorrelationandthefeasibilityofourproposedmethod.

简介：ThereolutioncharacteristicofGaAs/GaAlAstrransmissionphotocathodeisanimportantparameterinthirdgenerationintensifiers.ThemodulationtransferfunctionofGaAs/GaAlAstransmissionphotocathodeisderivedfromasimpletwo-dimensionaldiffusionequation.Thetheoreticalresolutioncharacteristicofa2μmthickGaAs/GaAlAstransmissionphotocathodeiscalculated.TherelationshipbetweenresolutionandparametersinGaAs/GaAlAstransmissionphotocathodeisdiscussed.AconclusionisshownthatonecandesigntheGaAs/GaAlAstransmissionphotocathodeformaximumquantumefficiency,sincethesacrificeintheresolutiondoesn'tlimitsystemperformances.

简介：ＢｅｎｅｆｉｔｓｏｆＳｅｒｉｅｓＣｏｍｐｅｎｓａｔｉｏｎｉｎＬｏｎｇＴｒａｎｓｍｉｓｓｉｏｎＳｙｓｔｅｍＸ．Ｚ．Ｌｅｉ，Ｄ．ＰｏｖｈＳＩＭＥＮＳＡＧ，ＰｏｗｅｒｔｒａｎｓｍｉｓｓｉｏｎａｎｄＤｉｓｔｒｉｂｕｔｉｏｎＧｅｒｍａｎｙ，Ｄ９１０５０．Ｐ．Ｏ...

简介：万维网上的地图数据的进步传播向用户提供自我适应的策略存取遥远的数据。它不仅加快网转移而且为信息提供一个有效航行指南获得。在这传播的关键技术在服务器地点上是空间数据和组织前的有效多重表示。这份报纸瞄准从三个方面调查一些限制的进步传播：服务器地点上的数据组织，在传播进程和数据的数据控制在联系顾客以后恢复。二策略，也就是联机的地图归纳和离线的地图归纳，为这种进步传播分别地被检验。

简介：AdoublehelixmodelofchargetransportinDNAmoleculeisgivenandthetransmissionspectraoffourDNAsequencesareobtained.ThecalculatedresultsshowthatthetransmissioncharacteristicsofDNAarenotonlyrelatedtothelongitudinaltransportbutalsotothetransversetransportofmolecule.Theperiodicsequencewiththesamecompositionhasstrongerconductionability.Withtheincreasingofbasescomposition,theconductiveabilityreduces,buttheweightofθdirectionrisesinchargetransfer.

简介：ＰｒｏｓｐｅｃｔｏｆＦｕｔｕｒｅＴｒａｎｓｍｉｓｓｉｏｎａｎｄＤｉｓｔｒｉｂｕｔｉｏｎＤｅｖｅｌｏｐｍｅｎｔｉｎＣｈｉｎａＳｈｅｎＧｅｎｃａｉＭｉｎｉｓｔｒｙｏｆＥｌｅｃｔｒｉｃＰｏｗｅｒ１．ＰｒｅｓｅｎｔＳｌａｔｅＤｕｒｉｎｇｔｈｅｒｅｃｅｎｔ１８...

简介：Whenasilicaopticalfiberisusedfortransmittingultraviolet(UV)light,theproblemsassociatedwiththedamageandtransmissiondeteriorationofsilicafiberintheUVregionneedtobesolvedinthefabricationprocess.Inthispaper,animprovedsilicafiberfabricationprocesswaspresentedtoenhanceUVtransmission,whichcombinedtheUVpre-irradiationonhigh-OHconcentrationpreformwithheattreatmentwhiledrawingfiber.Theimpactofthestructuraldefectsandcolorcenterswasdiminishedgreatlybythenewmethodoffabrication.Theexperimentalresultsaccordedwiththetheoreticalanalysis,andtransmissionwasimprovedabout0.4-0.7dB/mforwavelengthfrom350to400nm.