简介：Let(X1,X2,…,Xn)and(Y1,Y2,…Yn)berealrandomvectorswiththesamemarginaldistributions,if(X1,X2,…,Xn)≤c(Y1,Y2,…Yn),itisshowedinthispaperthat∑i=1^nXi≤cx∑i=1^nYiandmax1≤k≤n∑i=1^kXi≤icxmax1≤k≤n∑i=1^kYihold.Basedonthisfact,amoregeneralcomparisontheoremisobtained.

简介：Byexpandingtheperturbationofcovariancematrixinthepowersofer-rorterm,theinfluencefunctionsforfivecanonicalmeasurementsinCCAaredevel-opedandthreesampleversionsaregiven.Forgeneralizedcorrelationcoefficientp_z,theinfluencefunctionisaquadraticformofr.v.z,anditsdistributionisconsidered.ApracticalexampleiUustratestheutilityoftheproposedinfluencefunctions.

简介：Consideringasingle-modelasersystemwithcross-correlatedadditivecolorednoiseandmultiplicativecolorednoise,westudytheeffectsofcorrelationamongnoisesonthenormalizedintensitycorrelationfunctionC(s).C(s)isderivedbymeansoftheprojectionoperatormethod.Theeffectsoftheself-correlationtimeτ_1oftheadditivecolorednoise,τ_2ofthemultiplicativecolorednoise,andtheeffectofthecross-correlationtimeτ_0betweenthetwonoisesonC(s)arediscussedbynumericalcalculation.Forthecaseofpositivecorrelation(λ>0),itisfoundthatwhena_0>0thenormalizedintensitycorrelationfunctionC(s)increaseswiththeincreaseofToorτ_2,andwithvalueofτ_0orτ_2becominglarger,C(s)comestosaturation.Withincreasingtheself-correlationtimeτ_1oftheadditivenoise,aminimumandamaximumwillappearoncurveofC(s)asa_0>0.Ifa_0<0,C(s)decreaseswiththeincreaseofτ_0,τ_1,andτ_2.

简介：AbstractThe low success rates in the treatment of multidrug-resistant tuberculosis (MDR-TB) and extensively drug-resistant TB (XDR-TB), which account for 55% and 34% respectively, led the WHO to conclude that MDR/XDR-TB is a serious public health crisis. However, the virulence of MDR/XDR-Mycobacterium Tuberculosis(Mtb) has not been analyzed in details, which could provide a specific guidance for the control and prevention. In this review, we discuss different aspects of MDR/XDR-Mtb virulence and its relationship to fitness cost by probing the following questions: (1) what mediates the virulence of MDR/XDR-Mtb? (What is the relationship between fitness and virulence of Mtb? (2) Is it possible that drug-resistant Mtb(DR Mtb) can show higher fitness? (3) What is the definite effect on fitness of each drug-resistant mutant? (4) What other important factors affecting fitness in the mutant strain? (5) How to study the virulence of a large number of DR Mtb?And what prevention and control measures will be taken in the future, especially for the high virulent DR Mtb? We therefore summarized the congruent relationship between drug resistance and fitness from the global response-related genes to antibiotic resistance-contributing mutation, provided methods to explore the virulence of DR Mtb. This review may offer some critical information and concise guide to creating strategies for the prevention and control of drug-resistant Mtb.

简介：Objective:Toinvestigatethecorrelationbetweentraumaandpulmonarythromboembolism.Methods:Comminutedfracturesandextensivesoft-tissuecontusionatbothhindlimbsweremadebyafallingweightfromaheightin16rabbits.Lungperfusionscanningwasperformedtoobtaintheradioactivitycountsbeforetrauma,at1h,48hand96haftertrauma.Allthedataweredividedinto4groupsbasedontheabove4timepoints.Therabbitsweresacrificedwhenpositivefindingsonthepulmonaryperfnsionscanningappeared.Theirlungswereharvestedtobeparaffin-embeddedandstainedwithhematoxylin-erosinmethodforhistologicalexaminationofthromboembolism.TherandomizedblockdesignANOVAandthemethodofleastsignificantdifference(LSD)wereusedforstatisticalanalysisoftheradioactivitycounts.Results:Thehistologicalfindingsshowedthatpulmonaryembolismdevelopedin6ofthe16rabbits(37.5%).Fiveofthe6pulmonaryembolismrabbitspresentedneitherclinicalsymptomsnorpositivepulmonaryembolismmanifestationsinthelungperfusionscanning.Asignificantdifferencewasfoundinlungperfusionradioactivitybetweenthepre-traumatic,post-traumatic1hgroupsandpost-traumatic48hand96hgroups(P<0.05).Conclusions:Fracturesofthehindlimbsaccompaniedwithextensivesoft-tissuecontusionmaycausepulmonarymicro-embolismthatisnotsensitivetolungperfusionscanningandtendstohavenoclinicalsymptoms.Pulmonaryembolismdevelopmentmaytakemorethantwodaysaftertrauma.

简介：Thispaperanalyzestherelationshipbetweencapacityanddynamicsinrecurrentcorrelationneuralnetwork,andpointsoutthatinsomeconditionstherecurrentcorrelationneuralnetworkhashighmemorycapacity.Thenthispaperpresentsseveralmethodsforimprovingtheperformance.

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简介：Purpose:Tostudythecorrelationbetweenfunctionalandstructurallossinchronicglaucoma,asdetectedbyFrequencyDoublingTechnology(FDT)andHeilderbergRetinaTomograph(HRT).MaterialandMethods:60eyesof60patientswitheitherocularhypertensionorchronicopen-angleglaucomaunderwentvisualfieldtestingwithbothstandardautomated

简介：Astheevolutionofmobiletechnology,mobiledeviceshavebecomeanessentialtoolinpeople’sdailylife.Moreover,withtherapidgrowthofInternetandmobilenetworks,peoplecaneasilyaccessvariousservicesprovidedbymobileplatforms.Manyservicescanbeexecutedonthemobiledeviceswithvariousmobileapplicationslaunchedtomobileplatforms.Peoplecanchoosewhattheyliketoinstallintheirmobiledevicesandhencemaketheirlifemoreconvenient,entertaining,andproductive.However,therearetoomanymobileapplicationsforuserstochoose.Thegoalofthisresearchistoproposeamethodologywhichcanrecommendtop-Nlistsformobileapplications.Acommentcorrelationmatrixisproposed.Furthermore,arecommendationalgorithmformobileapplicationsbasedonusercommentsandkeyattributesisbuilt.Withtheproposedmethod,itoutperformsGoogleplayandisclosertouserrealfeelings.

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简介：空间关联系数是为对浅水里的健全繁殖的描述的最重要的参数之一。纵的关联长度的频率依赖仍然是一个开的话题。我们在一个浅水实验观察到以波长的单位的纵的关联长度随频率的增加增加。这现象没在出版报纸被看见。理论分析和数字模拟显示底部变细的非线性的频率关系是这现象的主要原因。

简介：Forsomelarge-scaleengineeringstructuresinoperatingconditions,modalparametersestimationmustbaseitselfonresponse-onlydata.Thisproblemhasreceivedaconsiderableamountofattentioninthepastfewyears.Itiswellknownthatthecross-correlationfunctionbetweenthemeasuredresponsesisasumofcomplexexponentialfunctionsofthesameformastheimpulseresponsefunctionoftheoriginalsystem.Sothispaperpresentsatime-domainoperatingmodalidentificationglobalschemeandafrequency-domainschemefromoutput-onlybycouplingthecross-correlationfunctionwithconventionalmodalparameterestimation.Theoutlinedtechniquesareappliedtoanairplanemodeltoestimatemodalparametersfromresponse-onlydata.

简介：ＴＨＥＣＯＲＲＥＬＡＴＩＯＮＳＴＵＤＹＢＥＴＷＥＥＮＰＬＡＳＭＡＶＩＳＣＯＳＩＴＹＡＮＤＦＩＢＲＩＮＯＧＥＮＣＯＡＧＵＬＡＢＩＬＩＴＹＴＨＥＣＯＲＲＥＬＡＴＩＯＮＳＴＵＤＹＢＥＴＷＥＥＮＰＬＡＳＭＡＶＩＳＣＯＳＩＴＹＡＮＤＦＩＢＲＩＮＯＧＥＮＣＯＡＧ...

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简介：Basedonaclassofbipolarsequenceswithtwo-valuesautocorrelationfunctions,anewfamilyofbipolarsequencesisconstructedanditscorrelationspectrumiscalculated.ItisshownthatthenewfamilyisoptimalwithrespecttoWelch'sboundandisdifferentfromthesmallsetofKasamisequences,whilebothofthemhavethesamecorrelationproperties.

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简介：Theprincipleofthespatialcorrelationcharacteristicsofsea-bottombackscatteringwasexpounded.TheKirchhoffmodelisintroducedtosimulatesea-bottombackscatteringandthespatialcorrelationiscalculated.Somesedimentcharacteristicparameters,suchastheratioofsedimentmassdensitytowatermassdensity,theratioofsedimentsoundspeedtowatersoundspeed,theattenuationcoefficientofsoundwaves,thestrengthandexponentofseabottominterfaceroughnessspectrum,areconsideredwhilesimulatingandtheirinfluencesonspatialcorrelationareanalyzed.Byestablishingtheexpressionsofthesedimentcharacteristicparameterswiththelogarithmicsedimentgrainsize,thevariationtendencyofthespatialcorrelationversusthelogarithmicsedimentgrainsizeisobtained.Thewidthofthemajorlobeofthespatialcorrelationfunctionnarrowsasthelogarithmicsedimentgrainsizeincreases.Thecomparisonsbetweensimulateddataandin-situdatacollectedinOctober2007haveproventhattheirspatialcorrelationfunctionwaveformsagreewellunderthesamesedimentcharacteristics.

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简介：TheChinesemainlandisdividedintosometectonicblocksbynearlyNE-andEW-orientatedfaults.MeanwhilestrongearthquakesintheChinesemainlandusuallyclusterintimeandspace.Wecall2earthquakesingroups2.TectonicblocksseparatedbyfaultsandearthquakesingroupsareprominentfeaturesofthetectonicsoftheChi-nesemainland.Correlationbetweenmovementoftectonicblocksandgroupsofearthquakesisdiscussedinthispaper.Theresultsshowthatearthquakesingroupsoftenoccurredatoneorseveralblockboundaryfaults.Thereleasedelasticstrainenergyisbuiltupinthesameperiodsandaroundblocks.Itmeansthatstrongearthquakesingroupsaremainlycausedbymovementofblocks.Fourtypesofblockmovementareidentifiedbasedongroupearthquakes:movementalongasingleboundaryofablock(oracombinedblocks),movementofasingleblock,movementofmulti-blocks,andmovementinblockinteriors.IfweconsiderdistributionofallstrongearthquakesoccurredintheChinesemainland,themovementalongasingleboundaryofablockismorepopularoneinducingstrongearthquakes.Butifweonlyconsiderearthquakesingroupsratherthansingleearthquakesthemovementofablockdominatesamongfourmodes.StatisticswithrespecttogroupearthquakesshowthattheTaihangshanmountainandtheNorthChinablockaremuchactiveintheeasternpartofChinesemainland,andinwesternpartofChinesemainlandtheactiveblocksareSichuan-YunnanandtheKunlun-Songpanones.