简介：Todevelopuniformandseismicenvironment-dependentdesignspectrum,commonaccelerationresponsespectralcharacteristicsneedtobeidentified.Inthispaper,abi-normalizedresponsespectrum(BNRS)isproposed,whichisdefinedasaspectrumofpeakresponseaccelerationnormalizedwithrespecttopeakaccelerationoftheexcitationplottedvs.thenaturalperiodofthesystemnormalizedwithrespecttothespectrumpredominantperiod,Tp.Basedonastatisticalanalysisofrecordsfromthe1999Chi-Chiearthquake,theconventionallynormalizedresponsespectrum(NRS)andtheBNRSareexaminedtoaccountfortheeffectsofsoilconditions,epicentraldistance,hangingwallanddamping.ItisfoundthatcomparedtotheNRS,theBNRSismuchlessdependentonthesefactors.Finally,somesimplerelationshipsbetweentheBNRStoraspecifieddampingratioandthatforadampingratioof5%,andbetweenthespectrapredominantperiodandepicentraldistancefordifferentsoiltypesareprovided.

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简介： <正> YoucouldprobablycountontwohandsthenumberoftimesthatI’veseenthesuncomeup.ItissoforeigntomethatwhenIheardfromexpatsinChinathatoneofthebestlocalsightshadtobeviewedjustaftersunrise,IreallyfeltthatwhateveritwashadtobetrulyspectacularorelseI’dgiveitamiss.ButwhenIwasassuredthatthiswouldbelikecomingtoBeijingandnotseeingTiananmenSquare,Igavein.Anyparkoropenareawoulddo,butIchosetogo

简介：这研究的目的是在1999在中央台湾在ML7.3假装聪明的地震以后为碎片流动(为碎片流动被触发的批评降雨)在降雨阀值分析可变性。有不同地质的条件的二个学习地点在地震区域被调查。Streambed调查被进行连续地监视在1999和2006之间的碎片流动。在7年的学习时期期间，每个碎片流动事件被识别，并且溪流床描绘了。结果证明为碎片流动的降雨阀值只在假装聪明的地震以后是显著地更低的，但是逐渐地恢复了。迄今为止，这降雨阀值仍然是比在地震以前的原来的水平低的。在降雨阀值的这可变性仔细与在碎片流动，它由于山崩很快增加了的开始区域的沉积材料的数量有关正在源于地震。随沉积材料的增加，降雨阀值在跟随假装聪明的地震的第一年期间严重地被降低。然而，重降雨动员了沉积材料，引起碎片流动并且下游地搬运沉积。与在沉积材料的减少，降雨阀值随着时间的过去逐渐地恢复了。而且，碎片流动仅仅在有足够的沉积材料引起重要运动的潜水艇盆发生了。因此，这些结果证实在碎片流动的开始区域的沉积材料是为碎片流动的降雨阀值的一个关键部件。

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简介：BriefIntroductiontoELTECS-Chi-LELTECS-Chi-LisaBritishCouncilChinainternetdiscussiongroupforChineseELT(Englishlanguageteaching)professionalswithaninterestintheteachingofEnglishasaforeignlanguage.LaunchedinForeignLanguageTeaching&ResearchPressbyHelenaKennedyQC,ChairoftheBritishCouncilon9thOctober1998,thenetworkhasnowover150subscribers,amongwhommorethan40arefromtheUK,Belgium,Japanandothercountries.

简介：RosalindBurford:IntroductiontoELTECS-Chi-LIamdelightedtowelcomeyoutoELTECS-Chi-L,anelectronicdiscussionforumforELTprofessionalsinChina.Bytheyear2,000itisestimatedthatonebillionpeoplewillbelearningEnglish.Itisthemainlanguageofbooks,newspapers,internationalbusiness,science,technology,travel,diplomacy,sport,musicandsoon.WhenEnglishissomuchindemanditmakessensetoshareideaswithcolleagues.That’swhytheBritishCouncildecidedtoestablishaninternationalEnglishLanguageContactsScheme-EL-TECSforshort.

简介：当前的实践使用预兆的模型外推长时期的反应系列基于在中等、弱的地震的远地的记录。然而，系列不足够长，数据经常不是可靠的，它意味着地震设计代码不能精确地为长时期的结构定义地震设计要求。近地的记录罪恶假装聪明的地震主要吃惊有大signal-to-noise比率(SNR)，它为学习长时期的加速反应光谱直到20秒使他们合适。来自在原因的差错的120km以内的246个车站的Theacceleration反应系列统计上在这篇论文被分析。long-periodresponse光谱上的距离和地点条件的影响被讨论，并且扩大系列的形状与在中国的地震设计代码指定的标准系列相比。最后，为到代码的未来修订的建议被建议。

简介：太极运动的架势比较平稳舒展，动作要求不僵不拘，符合人体的生理习惯，并且没有忽起忽落的明显变化和激烈的跳跃运动。所以，不同年龄、性别和体质的人，都可以参加锻炼；尤其是对体弱和患有一些慢性病的人，更是一种较好的体疗手段。

简介：文本分类问题中,卡方特征选择是一种效果较好的特征选择方法。计算单词的卡方值时,先计算单词针对每个类别的卡方值,再通过类别概率将卡方值调和平均,作为单词相对于整个训练集合的卡方值,这种全局方法忽视了单词和类别间的相关性。针对这一问题,提出基于类别的卡方特征选择方法。基于类别的方法针对每个类别遴选特征词,特征词数量根据事先设定的阈值、类别的文档数和整个训练集合文档数计算得到,不同类别的特征空间可能包含相同的特征词。采用KNN分类方法,将基于类别的方法与全局方法进行比较,实验结果表明,基于类别的方法能够提高分类器的总体性能。

简介： <正> Purpose:Thepurposeofthepresentstudywastoexaminetheeffectsofa24-weekTaiChiexerciseinterventiononbalanceandotherphysicalchangessuchasflexibilityandreactiontime(RT)amonghealthyoldermales.Methods:Thirty-eightmalesubjectsaged55—65yearswithoutpriorTaiChiexperiencewererecruitedfromalocalcommunityinShanghai,China.A60-minTaiChiexercisesessionwasperformedthreetimesaweekfor24weeks.ChangesinRT,sit-and-reachflexibilityandbalance(staticbalancewitheyesopenandclosedrespectively)weremeasuredbeforeandaftertheTaiChiintervention.Results:Afterthe24-weekTaiChiintervention,thechoiceRT(p<0.05)decreased,andsit-and-reachflexibilityimproved(p<0.01)overthepre-test(7.8±6.2vs.7.1±3.0cm).Swaylength,area,X-axisdeviationamplitudeandK-axisdeviationamplitudeperformancedecreasedsignificantlyaftertheinterventionwithadouble-footstancewitheyesopen(p<0.05).Swaylength,areaandaverageswayspeedshowedastatisticallysignificantdecreaseaftertheinterventionwiththedouble-footstancewitheyesclosed.Inthesingle-footstancewitheyesopencondition,swaylengthandaverageswayspeedshowedastatisticallysignificantdecrease(p<0.05).Conclusion:The24-weekTaiChiexerciseinterventionhadapositiveinfluenceonbalancecontrolinoldermales.

简介：ThephysicalmodeldescribingtheYin-Yangbalanceinthetai-chidiagramviathemeltingandfreezingprocessesinarotatingdevicepresentedinparts1and2isfurtherdevelopedforthecontemporarytai-chidiagramandintheyuan-chidiagram.Thecontemporarytai-chidiagramshowninFig.1isasimplificationformoftheancienttai-chidiagrampresentedinReference[2].Therearetwosemi-circlesformingtheinterfacecurvebetweentheyinandyanginthecontemporarytai-chidiagram.Byknowingthelocationoftheinterfacebetweentheyinandyanginthecontemporarytai-chidiagram,therequirementforthesimulationmodelistofindtheconditiontomatchtheinterfacelocation.Thesimplificationchangesnotonlythestructurebutalsothephysicalinsightoftheancienttai-chidiagram,whichwillbedescribedinthepresentstudy.Theyuan-chidiagramshowninFig.2isthecombinationoftheMasterChen’stai-chidiagrampresentedinReferences[1,2]andthecontemporarytai-chidiagram.Th

简介：TemporalchangesinsiteeffectsareobtainedusingtheHVSR(horizontal-to-verticalspectralratio)methodandstrongmotionrecordsaftertheMw7.6Chi-Chiearthquake,Taiwan.Seismicdatarecordedbetween1995and2010areused,comprising3,708datafrom15stationsadjacenttotheChelungpufault.Temporalfluctuationsaredeterminedbyanalyzingthesiteeffectvariationusingatime–frequencyvariation(TFV)diagrambasedontheseseismicdata.Stationsadjacenttothefaultshowsignificantdisturbancesintheresonancefrequencyat16–26Hz.StationTCU129showsa40%dropinfundamentalfrequencyafterthemainshock,andagradualreturntotheoriginalstateovernineyears.Forstationslocatedfartherfromthefaultzone,suddenchangesintectonicstressplayadominantroleintemporalchangestotheHVSR.Animpactanalysisofthedirectionalfactorconfirmsourfindingthattheproximityofthefaulttoseismicstationshasthemostinfluenceondata.

简介：Alargeearthquake(MW=7.6)occurredinJiji(Chi-Chi),Taiwan,ChinaonSeptember20,1999,andwasfollowedbymanymoderate-sizeshocksinthefollowingdays.TwoofthelargestaftershockswiththemagnitudesofMW=6.1andMW=6.2,respectively,wereusedasempiricalGreen(sfunctions(EGFs)toobtainthesourcetimefunctions(STFs)ofthemainshockfromlong-periodwaveformdataoftheGlobalDigitalSeismographNetwork(GDSN)includingIRIS,GEOSCOPEandCDSN.FortheMW=6.1aftershockofSeptember22,therewere97pairsofphasesclearenoughfrom78recordingsof26stations;fortheMW=6.2aftershockofSeptember25,therewere81pairsofphasesclearenoughfrom72recordingsof24stations.Foreachstation,2typesofSTFswereretrieved,whicharecalledP-STFandS-STFduetobeingfromPandSphases,respectively.Totally,178STFindividualswereobtainedforsource-processanalysisofthemainshock.Itwasnoticedthat,ingeneral,STFsfrommostofthestationshadsimilaritiesexceptthatthoseinspecialazimuthslookeddifferentoroddduetothemechanismdifferencebetweenthemainshockandtheaftershocks;andindetail,theshapesoftheSTFsvariedwithazimuth.BothofthemreflectedthestabilityandreliabilityoftheretrievedSTFs.ThecomprehensiveanalysisofthoseSTFssuggestedthatthiseventconsistedoftwosub-events,thetotaldurationtimewasabout26s,andontheaverage,thesecondeventwasabout7slaterthanthefirstone,andthemoment-rateamplitudeofthefirsteventwasabout15%largerthanthatofthesecondone.

简介：4月8日，第五十三届米兰国际家具展在新米兰国际展览中心盛大开幕，主展馆首次向华人品牌ACFCHIWINGLO敞开了大门。ACFCHIWINGLO是中国ACF设计产业集团与国际著名建筑、空间、家居产品设计大师声志荣先生共同创立的设计师联合品牌。全部产品均由卢志荣先生亲自设计，并在意大利顶级制造工厂中结合现代机械工艺和意大利传统手工技艺精心打造而成，旨在为消费者带来最纯粹的国际设计、意大利工艺、品质的完整体验，成就用家具打造卓越生活的梦想。

简介：Background:Cognitiveimpairmentisprevalentamongolderadultsandresultsindegradedqualityoflifeforolderadults.Asthepopulationages,thismaycauseahugeburdentosociety.Researchhasdemonstratedthatphysicalexerciseisbeneficialtocognitivefunction.Thepurposeofthismeta-analysiswastocriticallyassesstheeffectofTaiChiexerciseonglobalcognitive,executive,andmemoryfunctionsinolderadults.Methods:Afterathoroughelectronicsearchandselection,eightstudieswereincludedinthismeta-analysiswithtwocross-sectionalandsixinterventionstudies.Ninevariablesincludedinthismeta-analysiswere:minimentalstatusexamination(MMSE),Alzheimer’sdiseaseassessmentscale-cognitivesubscale(ADAS-cog),trailmakingtestpartA(TMA),trailmakingtestpartB(TMB),digitspantestforward(DSF),digitspantestbackward(DSB),visualspantestbackward(VSB),verbalfluencytest(VFT),andworddelayrecalltest(WDR).Theeffectsizesandforestplotsoftheseninevariablesweregenerated.Results:Four(MMSE,DSB,VSB,andVFT)outofninevariablesweresignificantlyimprovedafterTaiChiexercisewiththeeffectsizesrangedfrom0.20to0.46(smalltomedium).MMSErepresentedglobalcognitivefunction,andDSB,VSB,andVFTrepresentedmemoryfunction.Conclusion:TaiChiasamind-bodyexercisehasthepositiveeffectsonglobalcognitiveandmemoryfunctions,andmoreconsistentpositiveeffectswerefoundonmemoryfunction,especiallyverbalworkingmemory.

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