简介：在现有档案分类表基础上，通过分类号扩展，体现档案保管期限，解决困扰档案整理过程中的实际问题。

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简介：Growingevidencehasbeenfoundtosuggestthatearlydevelopmentofthecentralauditorysystemisdependentonacousticstimuli.Peripheraldamagecausedbynoiseexposureandototoxicdrugscaninducefunctionalandanatomicalchangesalongtheauditorypathways.Theinferiorcolliculus(IC)isauniquestructureintheauditorysystemlocatedbetweentheprimaryauditorynucleiofthebrainstemandthethala-mus.DamagetotheICinhibitorycircuitrymayaffectcentralauditoryprocessingandsoundperception.Here,wereviewsomeofthestrikingelectrophysiologicalchangesintheICthatoccurafternoiseexposureandototoxicdrugtreatment.AcommonoccurrencethatemergesintheICafterperipheraldamageishyper-excitabilityofsound-evokedresponse.ThehyperexcitabilityoftheICislikelyrelatedwithreducedinhibi-toryresponsethatrequiresnormalperipheralinputs.Earlyagehearinglosscanresultinalonglastingin-creasedsusceptibilitytoaudiogenicseizurewhichisrelatedtohyperactivityintheICevokedbyloudsounds.OurstudiessuggestthathearinglosscancauseincreasedICneuronresponsivenesswhichmayberelatedtotinnitus,hyperacusis,andaudiogenicseizure.

简介：IntroductionSuddensensorineuralhearingloss(SSNHL)isdefinedasahearinglossofatleast30dBoverthreecontiguousfrequenciesoccurringinlessthan3days[1].VertigoandprofoundhearinglossareconsideredpoorprognosticfactorsinSSNHL[2-4].ThemostcommondiseasesassociatedwithvertigoinSSNHLincludeBPPV,vestibularneu-[3]

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简介：口袋里装有如下所示6张卡片，如果从口袋里任意摸出两张卡片，再把这两张卡片上的数相加，那么结果可能是多少？

简介：Hearinglossandtinnitusareamongthemostcommonconsequencesoflongtermnoiseexposureandre-mainanunder-addressedheathissueinmostdevelopingnationsincludingChina.Therapidindustrializa-tionandlifestylechangesinChinaincreasetheconcernovernoiseexposureandnoiseinducedhearingloss(NIHL).ResearchonNIHLinChinaislimited.ThecurrentpaperreviewsstudiespublishedinEnglishandChineselanguageliteraturesregardingnoiseexposureandNIHLinChina.TheirimplicationontheChi-nesepopulationisdiscussed.ThepossibleutilityofaresearchmodelsuchastheDangerousDecibels?asameanstoincreaseunderstandingofthescopeofNIHLamongtheChinesepopulation,toeducatethegener-alpublicinChina(especiallytheyoung)aboutNIHLanditsprevention,andtostudyeffectsoflanguageandculturalfactorsoninternationalinformationdisseminationandbehavioralinterventionsisproposed.

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简介：2005年，国际纯粹与应用化学联合会（Inter—nationalUnionofPureandAppliedChemistry,IUPAC）与国际纯粹与应用物理联合会（Internation—alUnionofPureandAppliedPhysics,IUPAP）抽调专家成立了联合工作小组（jointworkingparty，JWP），并授权由其确定发现原子数大于111的新元素的声明优先权。

简介：为验证基于TM影像的面向对象分类方法对复杂地区地表覆被信息提取的可行性，以地处西南地区的渝北为例进行实验。利用样本数据对各个波段的光谱特征进行分析，取得对各波段覆被探测能力的初步认识；基于光谱特征的多尺度分割，运用面向对象分类方法对其分类：面向对象的分类方法总精度和Kappa系数分别为88．42g，和0．8547，将其与监督、非监督分类结果对比分析、结果表明，该方法有效抑制了“椒盐”现象，取得较好的分类结果。

简介：WedemonstrateamonolithicsinglefrequencyTm-dopedfiberamplifierwithoutputpowerof51.5W.Asinglefrequencyfiberlaserat1.97μmisamplifiedbyacascadedmasteroscillatorpoweramplifier(MOPA)systemwithall-fiberconfiguration.Theoptical-to-opticalconversionefficiencyofthemainfiberamplifieris45%.Noamplifiedspontaneousemission(ASE)orstimulatedBrillouinscattering(SBS)effectisobservedinthefiberamplifier.Theoutputpowercouldbefurtherscaledbylaunchingmorepumppower.

简介：12月21日，安康张岭鑫洲家园34号、36号、38号住宅楼工程主体结构通过验收，质检、设计、地勘、监理及建设单位在进行了仔细而全面的现场检测后，提出验收意见，一致认为主体结构质量满足设计和规范要求，同意下道工序的施工，并对后续工程施工需注意的问题提出了具体要求。

简介：Hearingloss(HL)isthemostcommonsensorydisorder,affectingallagegroups,ethnicities,andgen-ders.AccordingtoWorldHealthOrganization(WHO)estimatesin2005,278millionpeopleworldwidehavemoderatetoprofoundHLinbothears.Resultsofthe2002NationalHealthInterviewSurveyindicatethatnearly31millionofallnon-institutionalizedadults(aged18andover)intheUnitedStateshavetroublehearing.Epidemiologicalstudieshaveestimatedthatapproximately50%ofprofoundHLcanbeattributedtogeneticcauses.Withover60genesimplicatedinnonsyndromichearingloss,itisalsoanextremelyhet-erogeneoustrait.Recentprogressinidentifyinggenesresponsibleforhearinglossenablesotolaryngologistsandotherclinicianstoapplymoleculardiagnosisbygenetictesting.Theadventofthe$1000genomehasthepotentialtorevolutionizetheidentificationofgenesandtheirmutationsunderlyinggeneticdisorders.ThisisespeciallytrueforextremelyheterogeneousMendelianconditionssuchasdeafness,wherethemuta-tion,andindeedthegene,maybeprivate.Therecenttechnologicaladvancesintarget-enrichmentmethodsandnextgenerationsequencingofferauniqueopportunitytobreakthroughthebarriersoflimitationsim-posedbygenearrays.Theseapproachesnowallowforthecompleteanalysisofallknowndeafness-causinggenesandwillresultinanewwaveofdiscoveriesoftheremaininggenesforMendeliandisorders.Thisre-viewfocusesondescribinggenotype-phenotypecorrelationsofthemostfrequentgenesincludingGJB2,whichisresponsibleformorethanhalfofcases,followedbyothercommongenesandondiscussingtheim-pactofgenomicadvancesforcomprehensivegenetictestingandgenediscoveryinhereditaryhearingloss.

简介：Thewaltzingguineapigmaybeagoodmodeltoinvestigateifgeneticfactorcanchangethesensitivityinnoise-inducedhearingloss.Atotalof34waltzigguineapigswerestudiedandwefoundthatthereisnoanysignificantincreasedsensitivitytonoisetraumaiftheage-inducedhearinglosswasconsideredinwaltz-ingguineapig.

简介：WereportthedepositionofNb2O5filmsonunheatedBK-7glasssubstratesusingremoteplasmasputteringsystem.Theremoteplasmageometryallowspseudoseparationofplasmaandtargetbiasparameters,whichofferscompletedepositionratecontrol.Usingappropriateoxygenflowrates,high-densityandlow-lossNb2O5filmsaredepositedwithratesupto0.49nm/s.Lowerdepositionrates(~0.026nm/s)canalsobeobtainedbyworkingatlowtargetcurrentandvoltageandatlowpressure.Nb2O5filmsdepositedatdifferentrateshavetherefractiveindexofabout2.3andtheextinctioncoefficientaslowas6.9×10-5.

简介：【编者的话】亲爱的同学们，数学学习，你一定非常重视解题，希望提高自己的解题能力吧？是的，解题是数学学习的重要形式．那么，怎样学习解题呢？本刊特辟“举题说法”专栏，通过典型问题的分析与解决，让你经历解题的过程，与你分享解题的心得，共同提高解题的水平．愿本栏目成为你的好朋友．

简介：摘要国际疾病分类系统在国际上经过多次不断的修正编审，是一套较完整的科学分类法，具有专业性强、知识面广、实际操作难等特点。这就要求编码人员要熟练掌握ICD-10的编码规则，特别是优先分类章的使用原则，灵活应用相关书籍的检索功能多方面多途径地查找，并养成详读病案资料的好习惯，遇到疑难问题及时与临床医生沟通，使编码准确率不断提高。

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简介：如果一个命题的题设或结论不唯一确定,有多种可能情况,难以统一解答,就需要按可能出现的各种情况分门别类地加以讨论,最后综合归纳出问题的正确答案,这种解题方法叫做分类讨论法.它是一种比较重要的解题方法,也是近年来中考命题的热点内容之一;要用分类讨论法解答的数学题目,往往具有较强的逻辑性、综合性和探索性,既能全面考查学生的数学能力又能考查学生的思维能力,分类讨论问题充满了数学辨证思想,它是逻辑划分思想在解决数学问题时的具体运用.