简介：

简介：摘要：由于CRH3A型动车组在网络反馈上进行了简化设计，无法监测故障发生时状态，本文通过在原车组上重新“设计”，在不改变车组控制逻辑、不更换设备、不影响系统功能的前提下，抓取监测反馈数据，及时锁定故障点，节约售后维护成本，也为后续的新型动车组提供了网络监测的设计思路。

简介：

简介：AftertheendoftheColdWar,therehaveemergedaseriesofnewsignificantphenomenaininternationalrelations.First,asaresultofthecollapseoftheformerSovietUnionandthedisintegrationoftheWarsawTreatyOrganization,thereisnolongeracommonenemyforWesternEuropeandtheUS.Second,con-

简介：In2011,Chanproposedanimageauthenticationmethodbyproducingtheparitycheckbitsfrompixelswhosebitshavebeenrearranged.Duetothisrearrangement,thevalueofthemost-significantbitofeachtamperedpixelcanbedeterminedaccordingtoitsparitycheckbits.Withthehelpofthemost-significantbitofthepixel,thepixelcanberecoveredbyselectingtwopossible(7,4)Hammingcodewords.However,ifthedistancebetweentwoHammingcodewordsiswithinacertainrange,incorrectselectionmayoccur.Chan'smethodaddedoneadditionalbittoindicatethecorrectone.Itistrivialthatthismaydegradethequalityoftheauthenticatedimage.Inthispaper,wegroupfourmost-significantbitsintodifferentgroupstoformamappingcodebookandthemappingcodebookisusedtoproduceauthenticationdatainsteadofthe(7,4)Hammingcodebook.Theexperimentalresultsshowthattheproposedmethodhasagreaterabilitytorecovertamperedareas.

简介：在液晶电视中，电源电路输出的各路电压均较低（＋5V、＋12V或＋24V），不能满足高频调谐器所需调谐电压的要求（＋33V）。为此，在调谐电压供电电路中引入了微功率DC／DC（直流／直流）升压变换器其中，LT1615／LT1615-1微功率增强型DC／DC升压变换器最为常见。

简介：

简介：Weexploredthepossibilitiesofwhole-genomeduplication(WGD)inprokaryoticspecies,whereweperformedstatisticalanalysesoftheconfigurationsofthecentralanglesbetweenhomologoustandemrepeats(TRs)onthecircularchromosomes.Atfirst,wedetectedTRsontheirchromosomesandidentifiedequivalenttandemrepeatpairs(ETRPs);here,anETRPisdefinedasapairoftandemrepeatssequentiallysimilartoeachother.ThenwecarriedoutstatisticalanalysesofthecentralangledistributionsofthedetectedETRPsoneachcircularchromosomebywayofcomparisonsbetweenthedetecteddistributionsandthosegeneratedbynullmodels.Intheanalyses,weestimatedaPvaluebyasimulationusingtheKullback–Leiblerdivergenceasadistancemeasurebetweentwodistributions.Asaresult,thecentralangledistributionsfor8outofthe203prokaryoticspeciesshowedstatisticallysignificantdeviations(P<0.05).Inparticular,wefoundoutthecharacteristicfeatureofoneroundofWGDinPhotorhabdusluminescensgenomeandthatoftworoundsofWGDinEscherichiacoliK12.

简介：Inthispaper,weanalyzedtheOneFoundationsreliefandreconstructionactivitiesaftertheYaanearthquake.TheanalysisshowsthattheparticipationofNGOsindisasterreliefactivitieshasundergonedifferentstages.IntheJiujiangearthquake,NGOsparticipationwasintherudimentarystage.IntheWenchuanearthquake,theybecameoneoftheactiveparticipants.IntheYaanearthquake,theyplayedanactiverolethroughacooperationmechanism.ThatmeansNGOshavehadthecapabilityofresourcemobilizationandcooperationwiththemwillimprovedisastermanagementcapacities,especiallyinthenationalsignificantseismicmonitoringandprotectionregions.

简介：Forpredictionoftheextremesignificantwaveheightintheoceanareaswherelongtermwavedataarenotavailable,theempiricalmethodofextrapolatingshorttermdata(1～3years)isusedindesignpractice.Inthispapertwomethodsareproposedtopredictextremesignificantwaveheightbasedonshort-termdailymaxima.AccordingtothedaarecordedbytheOceanographicStationofLiaodongBayattheBohaiSea,itissupposedthatdailymaximumwaveheightsarestatisticallyindependent.Thedatashowthatdailymaximumwaveheightsobeylog-normaldistribution,andthatthenumbersofdailymaximavaryfromyeartoyear,obeyingbinomialdistribution.Basedonthesestatisticalcharacteristics,thebinomial-log-normalcompoundextremumdistributionisderivedforpredictionofextremesignificantwaveheights(50～100years).Forexaminationofitsaccuracyandvalidity,thepredictionofextremewaveheightsisbasedon12years′dataatthisstation,andbasedoneach3years′datarespectively.Theresultsshowthatwithconsiderationofconfidenceintervals,thepredictedwaveheightsbasedon3years′dataareveryclosetothosebasedon12years′data.TheobserveddatainsomeoceanareasintheAtlanticOceanandtheNorthSeashowitisnotcorrecttoassumethatdailymaximumwaveheightsarestatisticallyindependent;theyaresubjecttoMarkovchaincondition,obeyinglog-normaldistribution.Inthispaperananalyticalmethodisderivedtopredictextremewaveheightsinthesecases.AcomparisonofthecomputationsshowsthatthedifferencebetweentheextremewaveheightsbasedontheassumptionthatdailymaximaarestatisticallyindependentandthattheyaresubjecttoMarkovChainconditionissmallerthan10%.

简介：Overthepastfewdecades,extremechangeshaveoccurredinthecharactersofexploitedfishpopulations.Themajorityofthesechangeshaveaffectedthegrowthtraitsoffishlifehistory,whichincludeasmallersize-at-age,anearlierage-at-maturationandamongothers.Currently,thecausesoftheselifehistorytraitschangesstillrequiresystematicanalysesandempiricalstudies.Theexplanationsthathavebeencitedaremerelyexpressedintermsoffishphenotypicadaptation.Ithasbeenclaimedthattheoriginaltraitsoffishcanberecoveredoncetheintensityofexploitationofthefishiscontrolled.Sustainedenvironmentalandfishingpressurewillchangethelifehistorytraitsofmostfishspecies,sothefishindividual’straitsarestillinsmallsize-at-ageandatearlierage-at-maturationinexploitedfishpopulations.Inthispaper,weexpressedourviewofpointsthatfishinggearhasimposedselectivityonfishpopulationsandindividualsasvariousotherenvironmentalfactorshavedoneandsuchchangesareunrecoverable.Accordingtotheexistingtendofexploitedfishindividual’slifehistorytraits,wesuggestedfurtherresearchesinthisfieldandprovidedbettermethodsoffisherymanagementandtherebyfisheryresourcesprotectionthanthoseavailableearly.

简介：Anidiomisaphraseorsentence,whichmeanssomethingdifferentfromthemeaningofseparatewords.Idiomscomefromlong-timeuse.Connectedwiththebackgroundofeconomy,geographicalconditions,customs,stateofmind,etc,idiomsreflectthereallife.Differentpeoplehavebothsimilaranddifferentidioms.Idiomshavetheirownfeatures.Themaremanymethodsintranslatingidioms.Literaltranslation,synonymtranslationandfreetranslationarethemainthree.

简介：TherapidpopulationgrowthhasbeenamajorproblemofBeijing.Itaffectedontransportation,schoolingandhousing.On26thSeptember2011,BeijingPopulationandFamilyPlanningCommissionannouncedthattheywoulddraftpopulationassessmentprovisions.Governmentpolicieswouldbeissuedaccordingtopopulationplansforassessingtheireffectsonpopulationcontrol.

简介：本刊讯近日，在“中国银行业转型问题评估对话”讨论会上，深圳发展银行行长RichardJackson指出，当前银行业已经从产品、销售为主导变革到以客户为主导的时代，银行要从系统架构和业务模式等方面更多地考虑客户需求，并且应该有一套全新的思维方式来考虑IT平台如何能够支持未来银行的发展。

简介：当时秘鲁的邻国如玻利维亚、智利等国军队装备有英国制造的“卡登-洛伊德”轻型坦克，而巴西也装备意大利制造的CV-33型超轻型坦克和较老式的法国造雷诺FT-17/18型坦克。如同伊朗一样，秘鲁计划订购先进的轻型坦克。新式坦克的购人将使秘鲁在这一地区保持更大的军事优势。

简介：

简介：Genesarecontinuallybeingcreatedbytheprocessesofgenomeduplication(ohnolog)andgeneduplication(paralog)Whole-genomeduplicationshavebeenfoundtobewidespreadinplantspeciesandplayanimportantroleinplantevolution.Clearlyun-overlappingduplicatedblocksofwhole-genomeduplicationscanbedetectedinthegenomeofsequencedrice(Oryzasativa).Syntenicohnologpairs(ohnologues)ofthewhole-genomeduplicationsinricewereidentifiedbasedontheirsyntenicduplicatelines.Theparalogsofohnologueswerefurtherscannedusingmulti-roundreciprocalBLASTbest-hitsearching(E＜e-14).Theresultsindicatedthatanaverageof0.55sisterparalogscouldbefoundforeveryohnologueinrice.Theseresultssuggestthatsmall-scaleduplications,aswellaswhole-genomeduplications,playasignificantroleinthetwoduplicatedricegenomes.

简介：<正>InOctoberofthisyear,adesignevaluationmeetingonfeasibilitystudyofUHVDCtransmissionprojectwaspresidedoverbytheStateGridCorporation.Itindicatesthatthecorporationmadeagreatprogressinthepre-engineeringworkofUHVDCtransmission.TheUHVDCtransmissionprojects,whichsendelectricityfromJinshaRiverPhaseI(XiluoduandXiangjiabahydropowerstations)totheCentralandEasternChinaandfromJinping

简介：

简介：用C、Mn系列钢代替低合金钢生产链条用钢LT380,通过成分控制及控冷轧制,保证了产品冷弯及焊接性能满足用户要求,并在不增加生产成本的基础上了,提高了产品的附加值。