简介：东华门大街是北京城一条不足一公里长的东西向街道，它像一条扁担，一头儿挑着紫禁城，一头儿挑着王府井大街。在东华门大街的东侧有一座古老的庙观建筑-皇恩乔玄贞观。如今这庙院变成了北京的大杂院，人们在古建里过上了现代的生活，原本既富且贵的街道也变得别有韵味。

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简介：TheresistivityofHg0.89Mn0.11Tehasbeenmeasuredbythesuperconductingquantuminterferencedevicemagnetometerinthetemperaturerangefrom5to200Kundertheappliedmagneticfieldof1,2,4and6.5Tesla,respectively,comparedwiththatofno-magneticfield.Theresultsshowthattheresistivityincreaseswithincreaseappliedmagneticfieldathighertemperaturefrom80to200K,butdecreasesatlowertemperaturefrom5to25K.Thereexistsatransitiverangefrom25to80K,wherethevariationoftheresistivityshowsdifferenttendenciesdependingonthestrengthofmagneticfield.Maximumdifferenceofresistivityunder6.5Teslafromthatwithoutmagneticfieldinthetemperaturerangefrom30to200Kisonlyabout5Ω·cm,butitincreasesupto3ordersofmagnitudeat5K.TheanalysisshowsthatthevariationofresistivityofHg0.89Mn0.11Teunderthemagneticfieldisthealgebraicsumofthetransversedirectionmagnetoresistanceeffectandthesp-dexchangeinteractioneffect.TDRMEplaysmajorroleinthehightemperaturerange.However,withthedecreaseoftemperature,theeffectofsp-dEIontheresistivitygraduallyexceedsthatofthetransversedirectionmagnetoresistanceeffectthroughthetransitiverange,andbecomesthedominanteffectinthetemperaturerangefrom5to25K,whichleadstothedramaticdecreaseofresistivity.

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简介：为保护环境而采取的垃圾分类往往隐藏在人眼所看不到的地方。不同类型的垃圾储存在厨房内格柜中，然后倾倒到地下二层。新设计的垃圾分类包以一种全新的方法重新阐释了这种分类方式，这些垃圾分类包以全视图的方式悬挂在墙上。这些袋子是用无纺布制成的，这种材质便于清洗，并且是可回收的。由于集成磁铁的设计，打开袋子只需一只手凭直觉就可以完成，使每日的垃圾分类成为一件非常容易的事。在垃圾包的内里有一个功能性的、可移除的支持物，起到固定垃圾包的作用。当垃圾包的垃圾装满以后．用户可以将垃圾扔到外面的垃圾容器中。

简介：Basedonstatisticsprinciple,randomerrorandsystematicerrorwereconsideredandthevolumetricpropertiesofthetwomixturestypes,namelyAandB,werestatisticallyanalyzedusingdifferentdistributionmethods.Seventy-twosamplesofmixtureAandfifty-twoofmixtureBwerefabricatedusingtheMarshallmethod.Theprobabilitydistributionswerecomparedonthebasisofgoodnessoffit.Weibullmodelwasfoundtobemostappropriatemodelfordescribingtheasphaltmixturesvolumetricpropertiesdistribution.Thetwo-parameterWeibulldistributionfunctionappliedwelltomodelthebulkspecificgravityandvoidsfilledwithasphaltdata,whereas,thethree-parameterWeibulldistributionappearedtobemoreappropriateinthediscussingofairvoidsandvoidsinmineralaggregate.Theexperimetalresultsisrevealedthatcomparedwiththemeanvalue,thepeakvalueofWeibulldistributionwassuggestedasanalternativeandmorepowerfulparameterfordescribingthetestdatadistributioncharacteristic.Theanalysisoftestresultsalsorevealedthatthereweresignificantdifferencesinthevolumetricpropertiesofthetwotestedmixturesforthesameconfidencelevel.Theconfidenceintervaldecreasedwiththedecreasinginreliability.

简介：飞思旗下的子品牌“玛米亚利图”中文名称正式更名为“厉图中画幅”,英文名称为“Mamiyaleaf”不变。Mamiya品牌目前已经被丹麦飞思全资收购,而厉图中画幅产品也将继续以亲民的中画幅产品售卖。目前的厉图中画幅产品可以直接接驳飞思XF机身使用,亦可以搭配技术性要求更高的ALPA相机使用,实现更多功能。

简介：Inthispapertheresultsofahigh-speedtensionexperimentoftheSiC_w/Alcompositehavebeenreportedandasimplifiedtheoreticalmodelhasbeendevelopedtostudythefracturemechanismofcompositesinhigh-speedtension.Thistheoreticalmodelprovidesanewexplanationfortheincreaseofdynamicfracturestrengthofcompositesinhigh-speedtension.

简介：Thesteelreinforcedplasticpipeisakindofgreenenvironmentalprotectionpipelineswithdouble-sidescorrosionresistingandbetterwithstandingtomediumworkingpressure.Thestructureandtechnicalprocessofthispipearedescribedbrieflyinthispaper,andthefiniteelementanalysishasbeendoneforthesakeofunderstandingthedistributionsofstressanddisplacementinsidethispipeunderhydrostaticpressure.Theanalysisresultsareveryimportantforsafetyapplicationofthesteelreinforcedplasticpipe.

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简介：~~《条型码档案001号》@刘家祥

简介：AlN降水和再结晶质地上的一个电场的效果被调查。滚动寒冷的08Al杀死了钢表根据二拍子的圆舞过程在550degC被退火，在各种各样的维持的时间，有或没有使用一个电场。电场支持第二个阶段(AINparticles)的降水，这被发现，加强7纤维并且削弱在recrystallizedspecimens的cc纤维质地部件。对由电场的7纤维质地的加强的可能的解释是第二个阶段艾因河粒子在损坏不同地面向的谷物的情况下支持7纤维的生长。

简介：DensityofmoltenNiandNi-Walloyswasmeasuredinthetemperaturerangeof1773～1873Kwithasessiledropmethod.ThedensityofmoltenNiandNi-Walloystrendstodecreasewithincreasingtemperature.ThedensityandmolarvolumeofthealloystrendtoincreasewithincreasingWconcentrationinthealloys.ThecalculationresultshowsanidealmixingofNi-Walloys.

简介：Machinetoolhasbeenwidelyusedintheproductionofthemilitaryandcivilian.Themachiningprecisionoftheworkpieceisthedirectreflectionforthemachiningperformanceofmachinetool.Withtheimprovementforrequirementofthemachiningprecision,improvingtheaccuracyofmachiningisbecomingimportant.Guidewayandspindlearethekeymotioncomponentsthatdecidedtheshape,therelativepositionandthesurfaceroughnessoftheworkpiece.Inordertoadapttotherequirementsoftheworkpiecemachining,thispaperanalyzestheerrorsofguidewayandspindlethataffecttheaccuracyoftheprocessing,establishesthemotionrelationsforeveryerrorsofguidewayinmachiningprocess,identifiestheregularforthestraightness,bendingoftheguidewayandrotatingerrorofspindlethatinfluencestheworkpiecesurface.Finally,accordingtothecorrelationanalysisofthemeasuredandthesimulationresults,themotionerrorofmachinetoolisidentified,whichlaysthefoundationforimprovingtheaccuracyofmachinetoolinnextstep.

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简介：Thegradingcriterionofblastingclassification,evaluatingindexandthecharacteristicvaluearetakenasmatterelements.First,therelationalfunctionisconstructedaccordingtothegradingcriterion,andthen,thegradeofrockblastingisevaluatedbythecomprehensiverelationaldegree.Theauthorhaspresentedasystemmethodofblastingclassificationofrock.Thepracticalexampleprovesthatitissimpleincalculationandreasonableinevaluation.

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