学科分类
/ 23
451 个结果
  • 简介:Terahertz(THz)radiation,whosefrequencyrangesfrom0.1THzto10.0THz,hasrichscience,butlimitedtechnology.Ithaslongbeenconsideredthelastremainingscientificgapintheelectromagneticspectrum.Farfrombeingfullyexploited,itoffersgreatopportunitiesinscience,innovation,newtechnology,andpotentialapplications.

  • 标签:
  • 简介:基因治疗是为网膜的退化疾病的潜在地有效的治疗。定期聚类interspaced短palindromic重复(CRISPR)/CRISPR-associated蛋白质9(Cas9)系统在眼的研究作为一个新编辑染色体的工具被开发了。在研究的最近的进展证明CRISPR/Cas9在在视网膜炎pigmentosa(RP)和leber的vivo产生动物模型以及基因治疗被使用了先天的黑(LCA)。它被与象联系adeno的病毒(AAV)那样的另外的技术结合也为诊所作为一次潜在的尝试显示出并且导致pluripotent干细胞(iPSCs)。在这评论,我们加亮在指向网膜的退化使用CRISPR/Cas9的进一步的前景的主要的点。我们也在治疗网膜的退化疾病强调这种技术的潜在的应用程序。

  • 标签: CRISPR/Cas9 基因治疗 编辑的染色体 网膜的退化 视网膜炎 pigmentosa leber 先天的黑
  • 简介:ThispaperpresentsdesigntheoryandmethodoftheintellectualizedCAI.whichincludestheorganizationandexpressionoftheteachingcontentandtheteachingrequirementdeterminationinteachingprocess,anddevelopsahighlyintellectualizedCA1software.LA-CAI,touseforlinerarithmeticteachingprogram.

  • 标签: CAI intellectualization SOFTWARE
  • 简介:Inthisagecharacterizedbyrapidgrowthinthevolumeofdata,datadeidentificationtechnologieshavebecomecrucialinfacilitatingtheanalysisofsensitiveinformation.Forinstance,healthcareinformationmustbeprocessedthroughdeidentificationproceduresbeforebeingpassedtodataanalysisagenciesinordertopreventanyexposureofpersonaldetailsthatwouldviolateprivacy.Assuch,privacyprotectionissuesassociatedwiththereleaseofdataanddatamininghavebecomeapopularfieldofstudyinthedomainofbigdata.Asastrictandverifiabledefinitionofprivacy,differentialprivacyhasattractednoteworthyattentionandwidespreadresearchinrecentyears.Inthisstudy,weanalyzetheadvantagesofdifferentialprivacyprotectionmechanismsincomparisontotraditionaldeidentificationdataprotectionmethods.Furthermore,weexamineandanalyzethebasictheoriesofdifferentialprivacyandrelevantstudiesregardingdatareleaseanddatamining.

  • 标签: 技术 隐私保护 应用 数据挖掘 敏感信息 个人信息
  • 简介:最近,产生在的许多重要非线性的部分微分方程使用了物理、数学的科学被一条流行途径处理了,所谓的终止功能方法。在这份报纸,我们由分析最近的结果的这个方法的现在的一些缺点出版了报纸。我们也讨论方法的有效性的可能的改进。

  • 标签: 应用物理 进出口 非线性偏微分方程 备注 数学科学 函数法
  • 简介:Firstly,thispaperreviewsHall'stheoryofbootstrapcriticalpoints(Hall,1988)andtheEdgeworthexpansionforthemetrodirectionσ=μ(Fn)ofdirectionaldata(Wu&Deng,1996),andthenappliesHall'sresultstostudysixbootstrapconfidenceintervalsforcircularmeandirectionμ=μ(F).OurresultsshowthatSTUD-intervalandABC-intervalarebothsecond-ordercorrect.ForyonMisespopudationM(μ,k),wefindthatsixbootstrapconfidenceintervalsaxeseeond-ordercorrectliketheapproximatenormalconfidenceinterval,andSTUD-intervalisthird-ordercorrect.

  • 标签: 自助法 临界点 循环平均方向 Hall理论 Edgeworth扩展
  • 简介:Withthedevelopmentofwirelessnetworksandmobilecomputing,moreadvancedapplicationswithcontext-awarenessandadaptabilitytotheirchangingcontextareneeded.However,buildingcontext-awareapplicationsisdifficultduetothelackofadequateinfrastructuresupport.Inthispaper,awebmiddlewarearchitectureforthedevelopmentofcontext-awarenessapplicationsusingnearfieldcommunication(NFC)isproposed.Basedonit,theefficientsupportforacquiring,interpreting,andaccessingcontextisprovided,andtheuser’squalityofexperienceisimproved.Moreover,amobilewebmiddlewareforthetestingandfullrealizationofNFCcontext-awarenessapplicationshasbeendevelopedtogetherwithtwoapplicationexamples.

  • 标签: 应用程序 中间件架构 移动设备 上下文 NFC Web
  • 简介:Theproblemofdecisionmakinginanimpreciseenvironmenthasfoundparamountimportanceinrecentyears.Inthispaper,wedefinevaguesoftrelationandsimilaritymeasureofvaguesoftsets.Usingthesedefinitions,somenovelmethodsofobjectrecognitionfromanimprecisemultiobserverdatahasbeenpresented.Moreover,weintroducethenotionofgeneralizedvaguesoftsetsandstudysomeofitsproperties.Thesimilaritymeasureofgeneralizedvaguesoftsetsisalsopresentedandanapplicationofthismeasureindecisionmakingproblemshasbeenshown.

  • 标签: 模糊 广义 应用 相似性度量 决策问题 对象识别
  • 简介:Ageneralversionoftheinvertedexponentialdistributionisintroduced,studiedandanalyzed.ThisgeneralizationdependsonthemethodofMarshall-Olkintoextendafamilyofdistributions.Somestatisticalandreliabilitypropertiesofthisfamilyarestudied.Inaddition,numericalestimationofthemaximumlikelihoodestimate(MLE)parametersarediscussedindetails.Asanapplication,somerealdatasetsareanalyzedanditisobservedthatthepresentedfamilyprovidesabetterfitthansomeotherknowndistributions.

  • 标签: 可靠性分析 指数分布 应用程序 广义 最大似然估计 数值估计
  • 简介:Hybridorganic-inorganicperovskites(e.g.CH3NH3PbI3)haveattractedtremendousattentionduetotheirpromiseforachievingnext-generationcosteffectiveandhighperformanceoptoelectronicdevices.Thesehybridorganic-inorganicperovskitespossessexcellentopticalandelectronicproperties,includingstronglightabsorption,highcarrierabilities,optimizedchargediffusionlengths,andreducedchargerecombinationetc.,leadingtotheirwidespreadapplicationsinadvancedsolarenergytechnologies(e.g.highefficiencyperovskitesolarcells).However,thereisstillalackofinvestigationsregardingfundamentalpropertiessuchasferroelectricityintheseperovskites.Asconventionalferroelectricceramicsarepreparedathightemperatureandhavenomechanicallyflexibility,low-temperatureproceedandflexibleperovskiteferroelectricshavebecomepromisingcandidatesandshouldbeexploitedforfutureflexibleferroelectricapplications.Here,ferroelectricpropertiesinhybridorganic-inorganicperovskitesandseveralstate-of-theartperovskiteferroelectricsarereviewed.Novelferroelectricapplicationsofhybridorganic-inorganicperovskitesarediscussedaswell,providingguidelineforrealizingfuturehighperformanceandflexibleferroelectricdevices.

  • 标签: FERROELECTRICITY FERROELECTRIC materials FLEXIBLE DEVICES ORGANIC-INORGANIC
  • 简介:Thelaser-inducedrelativisticshockwavesaredescribed.Theshockwavescanbecreateddirectlybyahighirradiancelaserorindirectlybyalaseraccelerationofafoilthatcollideswithasecondstaticfoil.Aspecialcaseofinterestisthecreationoflaser-inducedfusionwherethecreatedalphaparticlescreateadetonationwave.Anovelapplicationissuggestedwiththeshockwaveorthedetonationwavetoigniteapre-compressedtarget.Inparticular,thedeuterium–tritiumfusionisconsidered.Itissuggestedthatthecollisionoftwolaseracceleratedfoilsmightserveasanovelrelativisticacceleratorforbulkmaterialcollisions.

  • 标签:
  • 简介:Ellipticequationistakenasanansatzandappliedtosolvenonlinearwaveequationsdirectly.Morekindsofsolutionsaredirectlyobtained,suchasrationalsolutions,solitarywavesolutions,periodicwavesolutionsandsoon.Itisshownthatthismethodismorepowerfulingivingmorekindsofsolutions,soitcanbetakenasageneralizedmethod.

  • 标签: 椭圆方程 非线性波函数 雅克比椭圆方程 周期波解 量子力学
  • 简介:InthispaperweestablisharesultaboutuniformlyequivalentnormsandtheconvergenceofbestapproximantpairsontheunitaryballforafamilyofweightedLuxemburgnormswithnormalizedweightfunctionsdependingonε,whenε→0.ItisintroducedageneralconceptofPadeapproximantandwestudyitsrelationwiththebestlocalquasi-rationalapproximant.Wecharacterizethelimitoftheerrorforpolynomialapproximation.WealsoobtainanewconditionoveraweightfunctioninordertoobtaininequalitiesinLpnorm,whichplayanimportantroleinproblemsofweightedbestlocalLpapproximationinseveralvariables.

  • 标签: 最佳局部逼近 加权卢森堡范数 勒贝格测度 实函数
  • 简介:Single-IonMicrobeam(SIM)isuniquelycapableofpreciselydeliveringapredefinednumberofchargedparticles(precisedosesofradiation)toindividualcellsorsub-cellulartargetsinsitu.Sincetheearly1990's,therehasbeenanever-increasinginterestindevelopingandapplyingtheSIMtechniquetoproblemsinradiobiologyforstudiesofcellandtissuedamagedbyionizingradiations.PotentialapplicationsforSIMinradiobiologycontinuestogrowandhavebeendiversified.Therearecurrentlymorethan14SIMfacilitiesworldwide,andtheyhavebeeninaconstantstateofevolution.ThispaperreviewsthecurrentstateofSIMresearchworldwideandtherelatedpivotaltechnologicaldevelopmentsinthefieldsofbothbiophysicsandradiobiology.RepresentativeapplicationsandtheperspectiveofSIMarealsointroducedanddiscussed.

  • 标签: 简单离子微光束 放射生物学 带电细胞 研究方向
  • 简介:Inthefarfieldoftheintensitydistributionofthebeamdeliveredbyatwo-stagetransient–collisionalexcitationX-raylaser(XRL),anon-expectedinterferencepatternthatisstablefromshottoshothasbeendiscovered.Itisdemonstratedthattheinterferenceiscausedbytheemergenceofanimaginarysourceintheamplifyingplasma,whichisphasematchedtotheradiationofthegenerator.TheobservedphenomenoniscalledanX-raycoherentmirage.Toexplaintheobtainedresults,anewtheoreticalapproachisdeveloped.ThebasicessentialconditionsforformationoftheX-raymirageareformulated,andpossibleapplicationsarediscussed.Thispaperdetailstheexperiments,includingtheformulationofthenecessaryandsufficientconditionsforformationoftheX-raymirage,andpossibleapplicationsarediscussed.

  • 标签: COHERENT seeded BEAMS MIRAGE PHASE-MATCHING X-RAY
  • 简介:Recentadvancesinoptogeneticshaveestablishedapreciselytimedandcell-specificmethodologyforunderstandingthefunctionsofbraincircuitsandthemechanismsunderlyingneuropsychiatricdisor-ders.However,thefabricationofoptrodes,akeyfunctionalelementinoptogenetics,remainsagreatchallenge.Here,wereportreliableandefficientfabricationstrategiesforchronicallyimplantableoptrodearrays.Toimprovetheperformanceofthefabricatedoptrodearrays,surfacesoftherecordingsitesweremodifiedusingoptimizedelectrochemicalprocesses.Wehavealsodemon-stratedthefeasibilityofusingthefabricatedoptrodearraystodetectseizuresinmultiplebrainregionsandinhibitictalpropagationinvivo.Furthermore,theresultsofthehistologystudyimplythattheelectrodepositionofcompositeconductingpolymersnotablyalleviatedtheinflammatoryresponseandimprovedneuronalsurvivalattheimplant/neural-tissueinterface.Insummary,weprovidereliableandefficientstrategiesforthefabricationandmodificationofcustomizedoptrodearraysthatcanfulfilltherequirementsofinvivooptogeneticapplications.

  • 标签: OPTOGENETICS OPTRODE Neural electrode ELECTRODEPOSITION Optical