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简介：ObjectivesToinvestigatetheeffectsofadrenergicreceptorantagonist(metoprololorprazosin)onmyocardialα1-ARdensityandthechangesofventriculareffectiverefractoryperioddispersion(VERP-D)inrabbitsaftermyocardialinfarction.Methodstwenty-fouradultmaleNewZealandrabbitsweredividedintofourgroupsatrandom:controlgroup(n=6);MIwithplacebogroup(n=6);MIwithmetoprololgroup(n=6);MIwithprazosingroup(n=6).Therabbitsreceivedcorrespondingdrugsforsevendays,beginningatthefirstdayafterMIandmyocardialα1-ARdensityweremeasuredandmeanwhile,myocardialβ-ARwasalsomeasured.ResultsIntheplacebogroup,thedensityofventricularα1-ARwasincreasedincomparisonwithcontrolgroup(α1-ARinnormalregion36.9±0.2vs27.3±0.9fmolmg-1Pro-1,p＜0.01;α1-ARinischemicregion33.0±0.9vs26.6±0.4fmolmg-1pro-1P＜0.01).Inthemetoprololgroup,itwasalsoincreasedincomparisonwithcontrolgroup(α1-ARinnormalregion44.7±1.5vs27.3±0.9fmolmg-1pro-1,P＜0.01;α1-ARinischemicregion33.6±0.5vs26.6±0.4fmolmg-1pro-1,P＜0.01).Meanwhilethedensityofventricularα1-ARinnormalregioninthemetoprololgroupwasincreasedincomparisonwithplacebogroup(44.7±1.5vs36.9±0.2fmolmg-1pro-1,P＜0.01).Whileitdecreasedintheprazosingroupincomparisonwithcontrolgroup(α1-ARinnormalregion22.5±0.6vs27.3±0.9fmolmg-1pro-1,P＜0.01;α1-ARinischemicregion20.9±0.4vs26.6±0.4fmolmg-1pro-1,P＜0.01).VERP-DwasincreasedafterMI(P＜0.01).Aftertreatmentwithmetoprololorprazosin,VERP-Dwasdecreased(P＜0.01).ConclusionsAfteracuteMI,α1-ARofventricularmyocardiumwasupregulated,whichmaybeaccompaniedbyitsactivitation.Thedensityofmyocardialα1-ARbecameupregulatedmoredramaticallytreatedwithmetoprololanddownregulatedwithprazosin.Whentreatedwithmetoprololorprazosin,VERP-Ddecreased.

简介：Ｍｅａｓｕｒｅｍｅｎｔ　ｏｆ　Ｌｉｎｅａｒ　Ｍｏｍｅｎｔｕｍ　Ｔｒａｎｓｆｅｒ　ｉｎ　Ａｒ＋Ｂｉ　ａｎｄ　Ａｒ＋Ａｇ　Ｓｙｓｔｅｍｓ　ａｔ　２５ＭｅＶ／ｕＭｅａｓｕｒｅｍｅｎｔｏｆＬｉｎｅａｒＭｏｍｅｎｔｕｍＴｒａｎｓｆｅｒｉｎＡｒ＋ＢｉａｎｄＡｒ＋...

简介：６０年代中叶建立的４０Ａｒ３９Ａｒ计时技术，已被广泛应用于测定各种矿物岩石的年龄，探讨区域性乃至全球性的重要地质问题。高精度４０Ａｒ３９Ａｒ计时技术的建立，使微钾矿物、流体包裹体４０Ａｒ３９Ａｒ定年成为可能。本文综合了笔者十多年来从事流体包裹体...

简介：Ｈｏｔ　Ｎｕｃｌｅｉ　Ｆｏｒｍａｔｉｏｎ　ａｎｄ　Ｄｅｃａｙ　ｏｆ　４０Ａｒ＋２０９Ｂｉ　ａｎｄ　４０Ａｒ＋１９７Ａｕ　Ｓｙｓｔｅｍ　ａｔ　３０ＭｅＶ／ｕＨｏｔＮｕｃｌｅｉＦｏｒｍａｔｉｏｎａｎｄＤｅｃａｙｏｆ４０Ａｒ＋(２...

简介：Ｉｎｔｅｒｍｅｄｉａｔｅ　Ｍａｓｓ　Ｆｒａｇｍｅｎｔ　Ｅｍｉｓｓｉｏｎ　ｉｎ　Ａｒ＋Ａｇ　ＣｏｌｌｉｓｉｏｎｓＩｎｔｅｒｍｅｄｉａｔｅＭａｓｓＦｒａｇｍｅｎｔＥｍｉｓｓｉｏｎｉｎＡｒ＋ＡｇＣｏｌｌｉｓｉｏｎｓ￥ＷｕＥｎｊｉｕ；ＺｈｅｎｇＪｉｗｅｎ；Ｗ...

简介：为随机的系统的噪音顺序的加权的和的顺序被在概率使用限制理论估计。然后，鞅差别顺序的噪音驾驶的不稳定的ARsystem的状态的分叉率被建立。

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简介：Ａｎａｌｙｓｉｓ　ｏｆ　Ｆｉｓｓｉｏｎ　ｉｎ　Ｒｅａｃｔｉｏｎ　４０Ａｒ＋２０９ＢｉＡｎａｌｙｓｉｓｏｆＦｉｓｓｉｏｎｉｎＲｅａｃｔｉｏｎ４０Ａｒ＋２０９Ｂｉ￥ＺｈａｎｇＣｈｕｎ；ＺｈｅｎｇＪｉｗｅｎ；ＷｕＥｎｊｉｕ；ＹｉｎＳｈｕ...

简介：40Ar-39ArdatingofalbitefromtheMeishanandTaocunirondepositsyieldsplateauagesof122.90±0.16Maand124.89±0.30Ma,andisochronagesof122.60±0.16Maand124.90±0.29Ma,respectively.PhlogopitefromtheZhongshan-Gushanorefieldhasaplateauageof126.7±0.17Maandanisochronageof127.21±1.63Ma.Analysisofregionalgeodynamicevolutionofthemiddle-lowerYangtzeRiverregionsuggeststhattheporphyryirondepositswereformedasaresultoflarge-scalelithospheredelaminationandstrongsinistralstrike-slipmovementoftheTanchengLujiangfaultzone.Thecopper,molybdenumandgolddepositsysteminthemiddle-lowerYangtzeRiverregionwasformedduringthestresstransitionperiodoftheeasternChinacontinent.

简介：让{Xn，n鈮?0}是一个AR(1)过程。让Q(n)是重新可伸缩的范围统计数值，或R/S统计数值为{Xn}它在这份报纸，我们在哪儿为AR(1)为重新可伸缩的范围统计Q(n)显示出重申的对数的一条法律给模型。关键词重新可伸缩范围统计-重申的对数的法律-AR(1)模型先生(2000)题目分类60F15-第一写作的62G20被NSFC(10071072)和SRFDP(200235090)支持。第二个作者被数学的部门的BK21工程支持，Yonsei大学，在POSTECH的KOSEF1999-2-103-001-5和Com2MaC的学科交差的研究节目

简介：本文提出一种对铜锍品位进行预测的新方法,以采集的现场数据为基础,采用系统辨识动态地建立了AR(p)模型与三次指数平滑模型.AR(p)模型要求数据对象是平稳时间序列,而三次指数平滑模型的数据对象具有随机性,考虑到铜锍品位的波动性,本文将二模型按最小二乘法原理,以组合预测误差平方和为目标函数,通过使误差平方和极小化来确定两种预测方法的优化,建立了一种新的组合模型,在三种模型中其预测误差最小.

简介：Byusingthe40Ar-39ArchronologicalmethodtodateK-feldsparfromK-feldspargraniteintheQiaohuotecopperdistrict,theauthorsobtainedaplateauageof274.78±0.44Maandanisochronageof272.7±3.0Ma.BecausethereisnotectonicdeformationoverprintedorhydrothermalalterationintheK-feldspargraniteintrusionafteritsemplacement,the40Ar-39AragerepresentsthecrystallizationageofK-feldsparinK-feldspargranite,i.e.thelatecrystallizationageoftheK-feldspargraniteintrusion,whichindicatesthattheK-feldspargraniteformedintheintraplateextensionalstageduringtheEarlyPermian.Moreover,basedonthespatialrelationshipbetweentheK-feldspargraniteintrusionandcopperorebodies,variationsofcopperoregrade,REEcharacteristicsofK-feldspargraniteandcopperores,andHandOisotopiccompositionsoffluidinclusionsincopperores,themetallogenesisoftheQiaohuotecopperdepositisdirectlyrelatedtointrusiveactivitiesoftheK-feldspargranite,andthusthecrystallizationageofK-feldsparinthegraniteapproximatelyapproachesthemetallogenicepochoftheQiaohuotecopperdeposit.

简介：八十年代中期,笔者一位朋友由亲友在香港买单,国内免税店内提货而得到一套"顶级"组合——美国AR气垫式音箱+NAD功放+JVC卡座,着实让包括笔者在内的许多人羡慕了很长一段时间,也从那时知道了美国老牌音箱——AR。后来通过港台及海外音响刊物及其他资料,逐步了解气垫音箱(即密闭式音箱)和高音单元的磁液冷却技术全部源自AR的发明。八十年代中后期重新投入生产的AR-3a,作为几十年前产品的纪念版,亦曾风靡一时,只可惜在上海未曾见其踪

简介：ThispaperconstructsasetofconfidenceregionsofparametersintermsofstatisticalcurvaturesforAR(q)nonlinearregressionmodels.Thegeometricframeworksareproposedforthemodel.Thenseveralconfidenceregionsforparametersandparametersubsetsintermsofstatisticalcurvaturesaregivenbasedonthelikelihoodratiostatisticsandscorestatistics.Severalpreviousresults,,suchas[1]and[2]areextendedtoAR(q)nonlinearregressionmodels.

简介：Ｓｔｕｄｙ　ｏｎ　ＩＭＦ　Ｅｍｉｓｓｉｏｎ　ｉｎ　３０　ＭｅＶ／ｕ　４０Ａｒ　Ｉｎｄｕｃｅｄ　ＲｅａｔｔｉｏｎｓＳｔｕｄｙｏｎＩＭＦＥｍｉｓｓｉｏｎｉｎ３０ＭｅＶ／ｕ４０ＡｒＩｎｄｕｃｅｄＲｅａｔｔｉｏｎｓ￥ＺｈｕＹｏｎｇｔａｉ；ＸｕＨｕｓ...

简介：Thebeamof35MeV/u~(40)ArwasdeliveredbyHIRFL(HeavyIonResearchFacilityatLanzhou).Atargetof674μg/cm~(2197)Auwasusedintheexperiment.Theexperimentwasmadeattheterminaloflargecylindeicalscatteringchamber,inwhichsixtelescopesareusedtomeasurechargedparticlesemittedintherearandmiddle

简介：ＦｒａｇｍｅｎｔＡｎｇｕｌａｒＤｉｓｔｒｉｂｕｔｉｏｎｓｆｏｒ１０００ＭｅＶ４０（Ａｒ）＋２０９ＢｉＲｅａｃｔｉｏｎ￥ＹｕＸｉａｎ，ＣｈｅｎＫｅｌｉａｎｇ，ＬｉｕＧｕｏｘｉｎｇ，ＺｈａｎｇＪｉｗｅｎ，ＳｕｎＴｏｎｇｙｕ，ＷｕＤｉｎｇ...

简介：将等级路面的不平度视为一零均值的噪声序列通过一个AR模型产生的随机序列,通过求解Yule-Walker方程得出AR模型参数,进而得到路面不平度.经数值算例构造出4个等级的路面不平度,验证了用AR模型构造路面不平度方法的可行性与可靠性.

简介：1引言丙烯酸树脂作为粘接和成膜材料在涂料行业早已大面积使用,显像管用有机涂膜是丙烯酸树脂作为粘合剂用于电真空器件的先例,其重要主份为聚合度(n)控制要求较高的聚甲基丙烯酸异丁酯(Pi-BMA)和聚甲基丙烯酸乙脂(PEMA),我们因生产显像管有机膜而受到启发.