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简介：ThefloraandcommunityphysiognomyofdegradedplantationecosystemsonpurplesoilwereinvestigatedinNinghuaCountyofFujianProvince,Chinatounderstandtherelationshipbetweenplantdiversityandecosystemprocesses..Fourdifferentrestorationcommunities(labeledasecologicalrestorationtreatmentI,II,IllandIV)wereselectedbyspace-timereplacementmethodaccordingtotheerosionintensityindegradedpurplesoilecosystem.Theresultsshowedthatthereweretotally86plantspeciesbelongingto78generaand43familiesinthedegradedpurplesoilecosystem.Ofthe15typesofdistributionareainspermatophytegenus,12typeswerefoundinthepurplesoilecosystem.Alongrestorationgradientfromlowtohigh,plantgrowthtypeandlifeformspectrabecameabundantmoreandmore,andthespermatophytegeneraforeachdistributionareatypeandgeneranumbersfordifferentfoliagecharactersincreasedaswell.Itisconcludedthattheplantfloraandphysiognomyinecologicalrestorationprocessbecomemorecomplexanddiverse,indicatingthattheforestecosystemonpurplesoiltendstobemorestable.

简介：GrandpaQin,now74,hasreturnedtowherehehadlivedformorethansixdecadesinthecompanyofhisdaughter.Infrontofhim,theolddilapidatedsceneshavealldisappeared.Theformernine1.9-meter-widelaneshavebecome12six-meter-wideroads.Theformercrowdedcourtyards,11stairsdownthelanes,havecompletelychangedtheiroutlook.TheonlythingsthatseemtohavenotchangedaretheoldBeijingstyleofbluetilesandgraybricksandtheimperialcitywallsnearbythatarethewitnessestoallthesechanges.GrandpaQinisamongthe300householdswhohavereturnedaftertherebuildingprojectwascompleted.Qin’sfamilylivedintheNanchizicommunityforfivegenerations.Thebig

简介：Anefficientmethodfortheidentificationofinfluentialspreadersthatcouldbeusedtocontrolepidemicswithinpopulationswouldbeofconsiderableimportance.Generally,populationsarecharacterizedbyitscommunitystructuresandbytheheterogeneousdistributionsofout-leavinglinksamongnodesbridgingovercommunities.Anewmethodforcommunitynetworkscapableofidentifyinginfluentialspreadersthatacceleratethespreadofdiseaseishereproposed.Inthismethod,influentialspreadersserveastargetnodes.Thisisbasedontheideathat,ink-shelldecompositionmethod,out-leavinglinksandinnerlinksareprocessedseparately.Themethodwasusedonempiricalnetworksconstructedfromonlinesocialnetworks,andresultsindicatedthatthismethodismoreaccurate.Itseffectivenessstemsfromthepatternsofconnectivityamongneighbors,anditsuccessfullyidentifiedtheimportantnodes.Inaddition,theperformanceofthemethodremainedrobustevenwhentherewereerrorsinthestructureofthenetwork.

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简介：Thechangesofmicrobialbiomasscarbon(MBC)andnitrogen(MBN)andmicrobialcommunityinthetopsoiloftheabandonedagriculturallandonthesemi-aridLoessPlateauinChinaduringthenaturalsuccessionwereevaluatedtounderstandtherelationshipbetweenmicrobialcommunityandsoilproperties.MBCandMBNweremeasuredusingfumigationextraction,andmicrobialcommunitywasanalyzedbythemethodoffattyacidmethylester(FAME).ThecontentsoforganicC,totalN,MBC,MBN,totalFAME,fungalFAME,bacterialFAMEandGram-negativebacterialFAMEatthenaturalsuccessionsiteswerehigherthanthoseoftheagriculturalland,butlowerthanthoseofthenaturalvegetationsites.TheMBC,MBNandtotalFAMEwerecloselycorrelatedwithorganicCandtotalN.Furthermore,organicCandtotalNwerefoundtobepositivelycorrelatedwithfungalFAME,bacterialFAME,fungal/bacterialandGram-negativebacterialFAME.Naturalsuccessionwouldbeusefulforimprovingsoilmicrobialpropertiesandmightbeanimportantalternativeforsustainingsoilqualityonthesemi-aridLoessPlateauinChina.

简介：ThispaperexaminesthelivelihoodchallengesexperiencedinRwanjabaLakeshoreCommunityduringtheperiodoflowwaterlevelinLakeVictoriabetween2004and2007andidentifiesthelivelihoodcopingstrategiesthatwereadoptedtoaddressthem.Atotalof55householdswererandomlysampledandthedatacollectionmethodsincludedhouseholdquestionnairesandparticipantobservations.ThedatawereanalyzedusingtheStatisticalPackageforSocialScience(SPSS)andtheresultspresentedwiththehelpofdescriptivestatistics.Thelivelihoodchallengesexperiencedduringthelowlakewaterlevelincludedfishshortage(34.5%),householdfoodscarcity(23.6%),sexforfish(18.2%),familybreakdown(12.7%),increasedtheft(7.2%)andaccidentsduetotheexposedrocksinthelake(3.6%).Thelivelihoodcopingstrategiesadoptedtoredressthechallengesincludedcausallabour(32.7%),maizeroasting(23.6%),sandmining(18.2%),sellingofsnacks(12.7%),sellinghouseholdproperty(9.1%)andresortingshopandmarketcredits(3.6%).Thepaperproposesanumberofrecommendationsforimprovingthelivelihoodofthecommunityrangingfrompolicyreformstothediversificationofactivities.

简介：AbstractThis paper provides ethical guidance for the professionally responsible clinical investigation of maternal-fetal investigation for fetal or neonatal benefit and its transition into clinical practice. We present an ethical framework based on the ethical principles of beneficence, respect for autonomy, and justice, the professional virtue of integrity, and the ethical concept of the fetus as a patient. We identify the implications of this ethical framework for the qualifications that centers for maternal-fetal intervention should satisfy. These centers have the ethical obligation to provide prospective review and oversight of both innovation (an experiment undertaken to benefit an individual patient) and research (an experiment undertaken to create generalizable knowledge). We describe ethically justified criteria for innovation and early-phase research, for randomized clinical trials, and for the responsible transition into clinical practice. We also identify the elements of the informed consent process, including measures to prevent therapeutic misconception by pregnant patients during the informed consent process. The scientific, clinical, and ethical requirements of maternal-fetal investigation are demanding. However, the commitment to safety and quality requires that they be met. Fulfilling this commitment will result in well-documented professionally responsible investigation of maternal-fetal intervention for fetal and neonatal benefit.

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简介：BackgroundTheclinicalcharacteristicsofstrokepatientstreatedwithdoubleanti-platelettherapy(DAPT)afterpercutaneouscoronaryintervention(PCI)isnotclear.MethodsIntotal,2675patientsunderwentPCIandDAPTinGuangdongGeneralHospital,and68outofthemwerehospitalizedduetosuspectedstroke,ofwhom23werediagnosedashavingstroke.Dataofthe23strokepatientswerecollectedandtraditionalriskfactorsassociatedwithstrokewereanalyzedretrospectively.ResultsThemeanageofthesepatientswas75.6±8.7years,and20(87.0%)weremales.Notably,19patientswerecomplicatedwithhypertension,7withdiabetesmellitus,7withprevioushistoryofstroke,nonewithatrialfibrillation(AF)orpatentforamenovale(PFO).Specifically,22patientswerediagnosedwithischemicstroke,and1patientwithhemorrhagicstroke.ConclusionStrokeinpatientstreatedwithDAPTafterPCIwascorrelatedwithadvancedage,gender,hypertension,diabetesmellitus,strokehistory.Longtermelectrocardiography(ECG)maybeneededforthediagnosisofAF,whiletrans-esophagealechocardiography(TEE)maybeneededforPFO.

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简介：当前基于身份(标志)cryptosystem缺乏两大政党的认证和用户的私人钥匙的机制分发。一些基于标志的signcryption计划和基于标志的证实的关键协议协议被介绍了，但是他们不能完全解决这个问题。一个新奇基于标志的认证计划基于基于标志的加密(IBE)和指纹哈希方法被建议在IBE计划解决困难，它包括证实发送者的消息接收装置，证实用户并且把私人钥匙传给他们的信任权威(TA)。而且，计划从终端扩大指纹认证的应用程序到网络并且免于指纹数据制造。指纹认证方法由二个因素组成。这个方法联合一个标志例如，给USB钥匙调音，与用户由混合有指纹特征的一个假散乱数字的指纹回锅肉丁。安全和试验性的效率满足实际应用的要求。

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简介：Inthispaper,firstlywedemonstratetheuseofnodaladmittancematrixtoconvertalow-passband-passfilterbasedonoperationalamplifier(op-amp)toacircuitbasedonasecond-generationcurrentconveyor(CCII).Thistechniqueallowsustogeteightpresumptionsoffiltercircuits.Secondly,wepresentanovelarchitecturecircuitofCCII,whichcanoperateatlowsupplyvoltageof±0.75V.AllsimulationsareperformedbyTSPICEmodels.ThesimulationresultsshowthatthiscircuithasalowimpedanceatterminalX(RX=1.01Ω),averyhighinputimpedanceatterminalY,andwidebandwidthcurrentandvoltage.Thecenterfrequencyoftheproposedfilterisvariableontheinterval[157kHz,196MHz].

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简介：Content-basedrouting(CBR)publish/subscribe(P/S)systemisanimportantclassofdistributedsystems.Thissystemdiffersfromclassicalparadigmsasmessagesareroutedbasedontheircontentratherthantheirdestinationaddress,soastoprovideafine-granularityeventdissemination,andsupportmoreflexibilitydecouplingapplications.Covering-basedroutingisatypicaloptimizationmethodofCBRandhasbeenwidelyusedasabuildingblockinmanydistributedP/Ssystems,foritmaintainsacompactroutingtableandreducesthecostsofcommunicationsandmatchingcomputations.Sofarasweknow,thisoptimizationmethodcanonlybeimplementedonacyclicoverlaynetwork,butcannotbedirectlyutilizedoncyclicnetworks.AstheCBRincyclicsystemsbecomesanewfocusofresearch,developingcovering-basedprotocolsandalgorithmsforcyclicP/Ssystemisbecomingsignificantlyimportant.Thispapercontributesthecycliccovering-basedroutingprotocolwithcorrespondingalgorithmstosupportcovering-basedprotocolincyclicP/Ssystem,andimplementsitinPADRES,adistributedeventmanagementinfrastructurebasedonthepublish/subscribemodel.

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简介：Tosimulatetherumorpropagationprocessononlinesocialnetworkduringemergency,anewrumorpropagationmodelwasbuiltbasedonactiveimmunemechanism.Therumorpropagationmechanismswereanalyzedandcorrespondingparametersweredefined.BAscalefreenetworkandNWsmallworldnetworkthatcanbeusedforrepresentingtheonlinesocialnetworkstructurewereconstructedandtheircharacteristicswerecompared.Agent-basedsimulationswereconductedonbothnetworksandresultsshowthatBAscalefreenetworkismoreconductivetospreadingrumorsanditcanfacilitatetherumorrefutationprocessatthesametime.Rumorspaidattentiontobymorepeopleislikelytospreadquickerandbroaderbutforwhichtherumorrefutationprocesswillbemoreeffective.Themodelprovidesausefultoolforunderstandingandpredictingtherumorpropagationprocessononlinesocialnetworkduringemergency,providingusefulinstructionsforrumorpropagationintervention.