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简介：Thenestednesspropertyhasbecomeanincreasinglyimportantmeansfordevisingefficientalgorithmsfornetworklocationproblems.Therehavebeenattemptstoexplorethenestednesspropertyofnetworklocationproblemswithsomespecialcasesoftheconvexorderedmedianobjectives.However,thereislittleresearchonthenestednesspropertyforthoseproblemswiththeconcaveorderedmedianobjectives.ThispaperconstructsatreenetworkTandshowsthatthenestednesspropertycannotholdfortheconcaveorderedmedianproblem,whichfillsagapintheresearchonthenestednessproperty.Finally,theauthorsposeanopenproblemonidentifyingthenestednesspropertyforthecontinuousstrategicorderedmedianproblem.

简介：Fordirectsequencespreadspectrum(DSSS)receivers,thecapabilityofrejectingnarrow-bandinterferencecanbesignificantlyimprovedbyaprocessoffrequency-domaininterferencesuppression(FDIS).Thekeyissueofthisprocessishowtodetermineathresholdtoeliminateinterferenceinthefrequencydomain,whichhasbeenextensivelystudied.However,thesepreviousmethodsaretediousorverycomplex.Asimpleandefficientalgorithmbasedonmediansisproposed.Theeliminationthresholdisonlyrelatedtothemedianbyascalefactor,whichcanbeobtainedbythenumericalanalysis.Simulationresultsshowthatthealgorithmprovidesexcellentnarrow-bandinterferencesuppressionwhileonlyslightlydegradingthesignal-to-noiseratio(SNR).Aone-passalgorithmusinglogarithmicsegmentationisfurtherderivedtoestimatemedianswithlowcomputationalcomplexity.Finally,theFDISisimplementedinafieldprogrammablegatearray(FPGA)ofXilinx.ExperimentsarecarriedoutbyconnectingtheFDISFPGAtoaDSSSreceiver,andtheresultsshowthatthereceiverhasaneffectivecountermeasurefora60dBinterference-to-signalratio(ISR).

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简介：Objective:Toanalyzequantitativelythesynergisticandantagonisticeffectsofcombinedoxymatrine(OMT)and5-fluorouracil(5-GU)onacelllineofhumanlivercancer(HepG2)withmedian-effectprincipleinvitro.Methods:Themedian-effectprincipleandMTTmethodwereusedinthequantitativeanalysisofeffectsofthetwodrugs.Results:Cytotoxicactivityoftheindividualdrugsenhancedasdrugconcentrationincreased.Asfa=0.41,aCIequalto1indicatedadditivity;fa<0.41,aCIlessthan1indicatedsynergy;andfa>0.41,aCIgreaterthan1indicatedantagonism.Thesequenceofadministrationdidnotinfluencethecytotoxicactivityofthecombinedantitumordrugs.Theratioofdrugconcentrationwasafactorthatcaninfluencethekillingeffect.Conclusion:Thecombineddrugsinteraction(CI<1)wassynergisticatlowerconcentrationandantagonisticathigherconcentration.Theratioofdrugconcentrationisafactorthatcaninfluencethekillingeffect.

简介：Thegravityp-medianmodelisanimportantimprovementtothewidely-usedp-medianmodel.However,thereisstilladebateonitsvalidityinempiricalapplications.Previousstudiesevendoubtthesignificanceofthegravityp-medianmodel.UsingacasestudyoftertiaryhospitalsinShenzhen,China,thisstudyre-examinesthedifferencebetweenthegravityp-medianmodelwiththep-medianmodel,bydecomposingthedifferencebetweenthetwomodelsintogravityruleandvariantattraction.Thisstudyalsoproposesamodifiedgravityp-medianmodelbyincorporatingadistancethreshold.Theempiricalresultssupportthevalidityofthegravityp-medianmodel,andalsorevealthatonlywhentheattractionsofcandidatefacilitylocationsarevariablewillthegravityp-medianmodelleadtodifferentresultswiththep-medianmodel.Thedifferencebetweenthemodifiedgravityp-medianmodelandthegravityp-medianmodelisalsoexamined.Moreover,theimpactsofthedistance-decayparameteranddistancethresholdonsolutionsareinvestigated.Resultsindicatethatalargerdistance-decayparametertendstoresultinamoredisperseddistributionofoptimalfacilitiesandasmalleraveragetraveltime,andasmallerdistancethresholdcanbetterpromotethespatialequityoffacilities.Theproposedmethodcanalsobeappliedinstudiesofothertypesoffacilitiesorinotherareas.

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简介：药的效果的研究，kanamycin，在recombinantEscherichiacoli的生长新陈代谢上，B1被对待的细胞的新陈代谢的活动监视的microcalorimeter执行。种recombinantEscherichiacoli房间暂停的力量时间曲线，与不同kanamycin剂量对待，被记录。效果的程度被变化在microcalorimetric曲线的斜坡评估，药行动的动力学从这些变化在到达了他们的最大的价值并且维持了他们的最大的价值的时间被解释。试验性的剂量效果关系遵循集体行动的法律的中部效果的原则：fa/(1?fa)=(D/D50)m。y=lg的一个阴谋[(fa)1?1]?1对x=lgD给斜坡m，D50和R。试验性的结果表明kanamycin的高集中在lg阶段在recombinantEscherichiacoliB1的生长上有禁止的效果，并且在静止时期有支持的效果。而且，microcalorimetry是为在生物学的调节效果的察觉的一个可靠方法，这被表明。

简介：Thisstudyproposesapost-processortoimprovetheharmonicstructureofavowelinanenhancedspeech,enablingthespeechqualitytobeimproved.Initially,aspeechenhancementalgorithmisemployedtoreducethebackgroundnoiseforanoisyspeech.Hencetheenhancedspeechispost-processedbyahybrid-medianfiltertoreducethemusicaleffectofresidualnoise.Sincetheharmonicspectraareimpactedbybackgroundnoiseandaspeechenhancementprocess,thequalityofavowelisdeteriorated.Aharmonicregeneratedmethodisdevelopedtoimprovethequalityofpost-processedspeech.Experimentalresultsshowthattheproposedmethodcanimprovethequalityofpost-processedspeechbyadequatelyregeneratingharmonicspectra.

简介：TheJiamusimcdianmassifislocatcdaboutlittlcXinganlingtoLaoycling,casternHeilongjiangProvince.Beinginaccordwiththediwathcory,thcJiamusipalaco-mcdianmassifdevclopspre-geosyn-clinlarchacansialiccrust.KhondalitescricsinthcJiXidistrictmaybcrcputcdasrcprcscntivc,isotopicageofwbichis25OOMa.ThcrcarethcDongfc

简介：Inthisstudy,ratswereputintotraumaticbraininjury-inducedcomaandtreatedwithmediannerveelectricalstimulation.Weexploredthewake-promotingeffect,andpossiblemechanisms,ofmediannerveelectricalstimulation.Electricalstimulationupregulatedtheexpressionlevelsoforexin-AanditsreceptorOX1Rintheratprefrontalcortex.Orexin-Aexpressiongraduallyincreasedwithincreasingstimulation,whileOX1Rexpressionreachedapeakat12hoursandthendecreased.Inaddition,aftertheOX1Rantagonist,SB334867,wasinjectedintothebrainofratsaftertraumaticbraininjury,fewerratswererestoredtoconsciousness,andorexin-AandOXIRexpressionintheprefrontalcortexwasdownregulated.Ourfindingsindicatethatmediannerveelectricalstimulationinducedanup-regulationoforexin-AandOX1Rexpressionintheprefrontalcortexoftraumaticbraininjury-inducedcomarats,whichmaybeapotentialmechanisminvolvedinthewake-promotingeffectsofmediannerveelectricalstimulation.

简介：Ourpreviousstudieshaveconfirmedthatduringnervetranspositionrepairtoinjuredperipheralnerves,theregeneratednervefibersofmotorneuronsintheanteriorhornofthespinalcordcaneffectivelyrepairdistalnerveandtargetmuscletissueandrestoremusclemotorfunction.Toobservetheeffectofnerveregenerationandmotorfunctionrecoveryafterseveraltypesofnervetranspositionformediannervedefect(2mm),30Sprague-Dawleyratswererandomlydividedintoshamoperationgroup,epineurialneurorrhaphygroup,musculocutaneousnervetranspositiongroup,medialpectoralnervetranspositiongroup,andradialnervemuscularbranchtranspositiongroup.Threemonthsafternerverepair,thewristflexiontestwasusedtoevaluatetherecoveryofwristflexionafterregenerationofmediannerveintheaffectedlimbsofrats.Thenumberofmyelinatednervefibers,thethicknessofmyelinsheath,thediameterofaxonsandthecross-sectionalareaofaxonsintheproximalanddistalsegmentsoftherepairednervesweremeasuredbyosmicacidstaining.Theratioofnewlyproduceddistalmyelinatednervefiberstothenumberofproximalmyelinatednervefiberswascalculated.Wetweightsoftheflexordigitorumsuperficialismusclesweremeasured.Musclefibermorphologywasdetectedusinghematoxylin-eosinstaining.Thecross-sectionalareaofmusclefiberswascalculatedtoassesstherecoveryofmuscles.Resultsshowedthatwristflexionfunctionwasrestored,andthenervegrewintothedistaleffectorinallthreenervetranspositiongroupsandtheepineurialneurorrhaphygroup.Thereweredifferencesinthenumberofmyelinatednervefibersineachgroup.Themagnificationofproximaltodistalnerveswas1.80,3.00,2.50,and3.12inepineurialneurorrhaphygroup,musculocutaneousnervetranspositiongroup,medialpectoralnervetranspositiongroup,andradialnervemuscularbranchtranspositiongroup,respectively.Nevertheless,axondiametersofnewnervefibers,cross-sectionalareasofaxons,thicknessesofmyelinsheath,wet

简介：Earthquakeengineershavemadealotofeffortstoderiveacomprehensivesetofclosedformexpressionsforperformanceevaluationofframes,whicharealreadypresentedinguidelinessuchasSAC/FEMA.Theseanalyticalexpressionshavebeendevelopedtoestimatetheannualprobabilityofexceedingalimitstate.Intheprocessofsuchseismicassessments,someessentialassumptionsareadoptedtosimplifytheprocess.Oneofthesefundamentalassumptionsdeclaresthatdriftdemandatanyseismicintensitylevelfollowsalognormaldistributionarounditsmedian.Toinvestigatethevalidityofthisassumption,thispaperdescribesacasestudyofthetypesoferrorsthatcouldbeproducedbyusingthesamplemedianasthecentraltendency.BasedontheMaximumLikelihoodEstimationmethodaswellasotherstatisticalevidence,thispaperproposestheuseofthesamplegeometricmeaninsteadofthesamplemedianforthecentraltendency.Further,theresultsofseismicreliabilityevaluationsof4sampleframesarecomparedbasedonutilizingboththegeometricmeanandthesamplemedian.Inthisprocess,bothfirstandsecondorderpowerlawfitsofthehazardcurveareimplementedtocomparetheeffectsofhazardestimationandtheselectionofthecentraltendencyonthefinalresults.Itisobservedintheapplicationexamplethatthesamplegeometricmeancouldleadtomoreaccurateresults.

简介：摘要:船舶在航行过程中,最主要的动力来源为轮机,同时轮机还是为船舶出航等提供重要能量的来源,从而为保证船舶的正常工作奠定了坚实的基础。而对船舶轮机安全性进行重点保障则是对其进行检测,但是在当前阶段对其进行检测时仍然存在着较多的问题,这将直接对船舶的行驶安全造成影响。因此,必须加强和提升船舶主机检验水平,检验效率应该利用先进科学技术和合理方法来进行提升,这样才能使得船舶运行能够有效降低风险,运行效率和安全功能也才能得到提升。文章重点对船舶轮机检验中常见的缺陷及排除措施进行探析。

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简介：摘要在建筑材料检验中，检验数据是衡量建筑材料质量的标准。在建筑材料中如何提高检验数据的准确性已经成为相关建筑人员急需要解决的问题。建材的质量关乎工程的质量，而工程选择合格的建材是通过建材检验来进行的，因此该结果对于建材的选择具有直接影响，同时也是其质量的体现，为了避免使用劣质的建筑材料，建材质量检验是一个必须开展的环节。

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简介：摘要：在船舶航行时，轮机是其最大的动力源，同时轮机也是船舶起航等的重要能源，因此，轮机是保障船舶正常运行的重要基础。而对其进行检测是保证船舶轮机安全性的关键，但目前在检测方面还存在很多问题，直接影响到船舶的航行安全。所以，一定要强化并提高船舶主机的检查水平，要采用先进的科技，并采用合理的方法来提高检查的效率，只有这样，才可以有效地减少船舶的操作风险，提高操作效率，提高安全功能。本文着重探讨了在轮船检查过程中，经常出现的问题及其解决方法。