简介：Inrecentyears,Chineseacademiahascloselyfollowedtheconceptofthe"middleincometrap".However,whenstudyingthisissue,manyscholars"expanded"thisconceptandraisedsomefalsearguments.Thispaperwillclarifythedefinitionofthe"middleincometrap",pointoutthemisunderstandings

简介：Weconsideronesourceofdecoherenceforaquantumcomputercomposedofmanytrappedionsduetothethermaleffectsofthesysteminthepresenceoflaser-ioninteraction.Theupperlimitofthetemperatureatwhichthelogicalgateoperationscouldbecarriedoutreliablyisgiven,andourresultisagreementwiththeexperiment.

简介：Takotsubosyndrome(TTS)isarecentlyidentifiedacuteheartsyndrome,characterizedbyregionalwallmotionabnormalitiesnotjustifiedbythepresenceofsignificantcoronaryarteryobstruction.Clinically,TTScloselyresemblesacutecoronarysyndromes(ACS)andthereforedifferentialdiagnosismaybeanimportantobstacleforitscorrectclinicalmanagement.TheprevalenceofTTSisestimatedtobearound2%ofacutemyocardialinfarctions,andthenumberofdiagnoseshasincreasedinrecentyears,possiblyreflectingourgrowingunderstandingofthiscondition.GiventhesimilaritiesbetweenTTSandACS,clinicalpresentationinthesepatientsisequivocal.However,numerouspeculiartraitshavebeenobserved,suchasthegreaterprevalenceinpostmenopausalwomenandthepresenceofstressfultriggers.ManypathogenetichypothesesforTTS,suchascatecholamineoverloadandmicrovasculardysfunction,havebeenproposed.Noneofthesehavebeencapableofindependentlyexplainingtheunderlyingmechanisms.ThediagnosticcriteriaproposedbytheHeartFailureAssociationoftheEuropeanSocietyofCardiologyrepresentanovelattempttointroducesemiquantitativeparameters,yetfurtherscientificvalidationisneeded.Contrarytopreviousopinions,TTSisnotalwaysbenign,consideringtherelativelyhighprevalenceofacutecomplications,anestimatedin-hospitalmortalitysimilartothatofacutemyocardialinfarction(1-8%),andasignificantrateofrecurrencesandpersistenceofsymptoms.ClinicalmanagementofTTShasbeenlargelybasedonempiricalexperiencerelatedtoACS,andthereforepharmacologicalstrategiesarepartiallyoverlapping.Anissueoftheutmostimportanceisthelackofrandomizedprospectivedatavalidatingdiagnosticcriteria,riskstratification,andspecifictherapeuticapproaches.

简介：WeproposetwoschemesfortheimplementationofquantumdiscreteFouriertransformintheiontrapsys-tem.Ineachschemewedesignatunabletwo-qubitphasegateasthemainingredient.Theexperimentalimplementationoftheschemeswouldbeanimportantsteptowardcomplexquantumcomputationintheiontrapsystem.

简介：Quantumcomputingrequiresultracoldionsinagroundvibrationalstate,whichisachievedbysidebandcooling.WereportourrecenteffortstowardstheLamb-Dickeregimewhichisaprerequisiteofsidebandcooling.Wefirstanalysethepossibleimperfectioninourlineariontrapsetupandthendemonstratehowtosuppresstheimperfectionbycompensatingtheexcessmicromotionoftheions.Theions,afterthemicromotioncompensation,areestimatedtobeveryclosetotheDoppler-coolinglimit.

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简介：Themainlycharacteristicoftrappingmaterialsisthetrapdepth.Soitissignificanttocalculatethetrapdepthforthetrappingmaterials.Anewmethodofcalculatingtrapdepth,whichisbasedonenergybandandusingrateequationstoanalyzethermoluminescence,wasbroughtforward.Thismethodwhichusestherateequationsoftheprocessandthethermoluminescencecurvecanreplacetraditionalmethodssuchasfirstorderorsecondorderkinetics.ThetrapdepthofSrAl2O4:Eu2+,Dy3+andSr4Al14O25:Eu2+,Dy3+wasestimatedfromtheglowcurve.Thenthenumevicalsolutionofthetrapdepthcanbeobtained.Fromtheresultsofexperimentsandcalculations,thismethodcanaccuratelyindicatethewholeprocess.

简介：三重四极杆质谱仪在定量分析方面较优,而离子阱质谱仪则在定性分析方面较优。QTRAP质谱仪将三重四极杆质谱仪和离子阱质谱仪的功能以一种新的方式结合在一起,既保留了串联四极杆质谱仪的优点,如母离子扫描、中性丢失扫描、选择反应监测的功能,又克服了传统3D离子阱质谱仪诸如低质量截止点（1/3效应）等缺点,是一台集定性与定量功能于一体的质谱仪。该文介绍了QTRAP四极杆-线性离子阱质谱仪的基本原理和分析策略,并简述其在药物代谢研究方面的应用。

简介：InthispaperwestudythesolutionofSATproblemsformulatedasdiscretedecisionanddiscreteconstrainedoptimizationproblems.Constrainedformulationsarebetterthantraditionalunconstrainedformulationsbecauseviolatedconstraintsmayprovideadditionalforcestoleadasearchtowardsasatisfiableassignment.Wesummarizethetheoryofextendedsaddlepointsinpenaltyformulationsforsolvingdiscreteconstrainedoptimizationproblemsandtheassociateddiscretepenaltymethod(DPM).Wethenexaminevariousformulationsoftheobjectivefunction,choicesofneighborhoodinDPM,strategiesforupdatingpenalties,andheuristicsforavoidingtraps.ExperimentalevaluationsonhardbenchmarkinstancespinpointthattrapscontributesignificantlytotheinefficiencyofDPMandforceatrajectorytorepeatedlyvisitthesamesetofornearbypointsintheoriginalvariablespace.Toaddressthisissue,weproposeandstudytwotrap-avoidancestrategies.Thefirststrategyaddsextrapenaltiesonunsatisfiedclausesinsideatrap,leadingtoverylargepenaltiesforunsatisfiedclausesthataretrappedmoreoftenandmakingtheseclausesmorelikelytobesatisfiedinthefuture.Thesecondstrategystoresinformationonpointsvisitedbefore,whetherinsidetrapsornot,andavoidsvisitingpointsthatareclosetopointsvisitedbefore.Itcanbeimplementedbymodifyingthepenaltyfunctioninsuchawaythat,ifatrajectorygetsclosetopointsvisitedbefore,anextrapenaltywilltakeeffectandforcethetrajectorytoanewregion.Itspecializestothefirststrategybecausetrapsarespecialcasesofpointsvisitedbefore.Finally,weshowexperimentalresultsonevaluatingbenchmarksintheDIMACSandSATLIBarchivesandcompareourresultswithexistingresultsonGSAT,WalkSAT,LSDL,andGrasp.TheresultsdemonstratethatDPMwithtrapavoidanceisrobustaswellaseffectiveforsolvinghardSATproblems.

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简介：<正>ThespatialchaosofBose-Einsteincondensatesinacigar-shapedtrapisstudied.Forasystemwithasteadycurrent,weconstructthegeneralsolutionofthe1st-orderequation.Fromtheboundednessconditionofthegeneralsolution,weobtaintheMelnikovfunctionpredictingtheonsetofchaos.Theunpredictabilityofthesystem’sdis-tributionofatomdensityisalsotheoreticallyanalyzed.Fora23Nasystemmeetingtheperturbationoondition,numericalsimulationsshowtheexistenceofchaos,whichisinaccordancewithouranalyticalresults.Numericalsimulationsofa87Rbsystemdissatisfyingtheperturbationconditionalsodemonstratethatthereexistschaosinthesystem.Thecasewithoutacurrentisalsoinvestigated.

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简介：为了建立杧果目标区域扩增多态性（TRAP）标记技术体系，对影响该反应体系的Mg2＋、dNTPs、固定引物浓度、随机引物浓度以及TaqDNA聚合酶等5个因素进行优化。

简介：我们报导nxn“在n的情况中的像连贯的州的解决方案，n”=1,2，...为包括二的系统，相关库仑的离子与一个时间依赖者泛音潜力在一个维的Paultrap限制了。n之一“centre-of-massmotion的准确答案描述一个概括协调状态。为小开车力量，相对运动的napproximatesolutions被构造，它在古典平衡位置附近描述twoions的协调摆动。

简介：把我们展出了的显微镜的光陷井基于在1064nm套住的单个铯原子编码为铯钟的单个qubit说。有高效率的单个qubit初始化，察觉和快州的旋转被表明，这州的操作为量信息处理是关键的。扎根的状态Rabi229.0的跳动的率

简介：地震沉积科学用地震数据是沉积岩石和外形的学习。然而，经常，沉积身体特征不能被描述份量上由于地震分辨率的限制。高决定倒置抵消这限制并且被用于地震沉积科学在复杂地质的条件下面识别微妙的陷井，从而拓宽地震沉积科学的适用的范围。在这篇论文，基于地震沉积科学，地震控制阶段的非线性的随机的倒置被用来在Shengli油矿在Chezhen消沉预言Es3的沙的集团企业水库。厚度和在几个阶段的沙的集团企业身体的沉积微外形地图被钻介绍，几个微妙的陷井被预言并且验证。

简介：甘薯白人的爆发飞，Bemisiatabaci(Gennadius)，biotypeB发生在帝国山谷，在1991的加利福尼亚。昆虫破坏了甜瓜庄稼并且严重损坏了另外的蔬菜，观赏植物和排庄稼。由于对采样技术的需要，我们开发了一个白捕蝇器(说出CC陷井)那能为扩大时间时期在这块地里被离开。我们使用了陷井监视B的人口。tabaci成年人duringyear周围，到在周刊的学习变化的从1996～2002的采样套住昆虫的钩子。B的最大的数字。tabaci成年人在1996被记录，每年通过2002在陷井钩子由继续跟随了年度减少。B的全面衰落。tabaci部分地被归因于一个综合害虫管理(IPM)的采纳在1992开始并且从1996～2002减少了甜瓜公顷的节目。另外的因素可能也贡献了人口减小。季节地，B。tabaci陷井钩子与被建议是影响季节的活动和复制的一个重要因素的减少的最低温度在迟了的夏天和秋天同时发生的事件期间减少了。

简介：Anon-radioisotopic,quantitativeTRAP-basedtelomeraseactivityassaywasestablishedmainlybyusingSYBRGreen-Istaininginsteadofradioisotope.Comparingwithconventionalradioisotopebasedmethod,itwasbetterinreproducibilityandaccuracy.Usingthismethod,wefoundtelomeraseactivitieswereabsentinnormalhumanlivercells,whiledetectedinalloffourhumanhepatomacelllines(BEL-7404,SMMC-7721,QGY-07903andHCCM)withoutsignificantdifferences.

简介：由密度功能的计算，我们调查在一个维的泛音陷井限制的Bose费密混合的地面状态性质。有接触相互作用的波色子和极化的费米子的同类的混合能被Bethe-ansatz方法确切解决。在给地面状态精力密度的准确公式以后，我们采用本地密度的近似决定每个部件的密度分发。相互作用什么时候足够强壮却有限，被显示出随相互作用的增加，全部的密度分发演变到在二个部件之间的像费密的分发和系统展览阶段分离。当在无限的相互作用限制波色子和费米子显示完全一样的像费密的分布并且分阶段执行时，分离消失。