简介:摘要根据现代照明的需求,本项目采用数字可寻址照明接口(DALI)协议,DALI最大的特点就是单个灯具具有独立地址,通过DALI系统软件可对单灯或任意的灯组进行精确的调光及开关控制,可对同一回路或不同回路上的单个或多个灯具进行独立寻址,从而实现单独控制和任意分组。
简介:Thisstudyinvestigatesdata-processingmethodsandexaminestheprecipitationeffectongravitymeasurementsattheDaligravitynetwork,establishedin2005.High-qualitygravitydatawerecollectedduringfourmeasurementcampaigns.Tousethegravitydatavalidly,somegeophysicalcorrectionsmustbeconsideredcarefully.Wefirstdiscussdata-processingmethodsusingweightedleastsquaresadjustmentwiththeconstraintoftheabsolutegravitydatum.Resultsindicatethatthegravityprecisioncanbeimprovedifallabsolutegravitydataareusedasconstraintsandifcalibrationfunctionsofrelativegravimetersaremodeledwithintheobservationfunction.Usingthisdata-processingscheme,themeanpointgravityprecisionisbetterthan12lgal.Afterdeterminingthebestdata-processingscheme,wethenprocessthegravitydataobtainedinthefourmeasurementcampaigns,andobtaingravitychangesinthreetimeperiods.Resultsshowthatthegravityhasaremarkablechangeofmorethan50lgalinthefirsttimeperiodfromApr–Mayof2005toAug–Septof2007.Tointerpretthelargegravitychange,ameanwatermasschange(0.6minheight)isassumedintheETOPO1topographicmodel.Calculationsoftheprecipitationeffectongravityshowthatitcanreachthesameorderoftheobservedgravitychange.ItisregardedasamainsourceoftheremarkablegravitychangeintheDaligravitynetwork,suggestingthattheprecipitationeffectongravitymeasurementsmustbeconsideredcarefully.
简介:Thereexistintermediatetointermediate-acidshoshoniticrocksdatedat26.3-36.7MaintheEarlyTertiaryextensionalbasinsalongtheNEflankoftheDali-JianchuansectionoftheHonghe-Ailaoshanleft-lateralstrike-slipductileshearzone,wheresomehigh-andmedium-highgrademetamorphosedmaficenclaveshavebeenfound.AccordingtotheP-Tconditionsandmineralassemblagecharacteristics,theenclavesaregroupedintothreetypes:type-Ⅰ,garnetdiopsidite,formedatlowercrustorinthetransitionalsectionbetweenthemantleandthecrustwiththemetamorphicconditionP=(10.47-11.51)×108PaandT=771-932℃;type-Ⅱ,garnet-anddiopside-bearingamphibolite,formedatthedepthofmiddletolowercrustwiththemetamorphiccondition:P=(6-10)×108PaandT=780-830℃;type-Ⅲ,metamorphosedgabbro,formedatrelativelyhigherlevelsthantheabove2typeswithlowermetamorphiccondi-tion.Type-Ⅰandtype-ⅡenclaveshadexperiencedadecompressionalretrogrademetamorphismcausedbytectonicelevationassociatedwiththemetasomatismofSiO2,Na2O-richfluidphasewiththenewequilibratedtemperatureatT=761-778℃.Geochemicalevidenceindicatesthatbothdeep-derivedmaficenclavesandhostrockshavesimilarEMⅡproperties,whicharerelatedtotheinvolvementofsubductedmaterials.Thesustainingsubduction,compressionandstrike-slipductileshearingbetweentheIndiaplateandtheYangtzecratonarethemainconstraintsonthesubcontinentalmantleproperties,interactionbetweencrustandmantle,andtheformationandevolutionofalkali-richmagma.
简介:音响界里,公认好的产品多如牛毛,但能够真正成为经典、为后人所传颂的,却恐怕也只是寥寥可数。这当中,如果细分出书架音箱类的话,必定上榜的,BBCLS3/5a肯定占有一精之地。这对体形只有鞋盒般大小的密闭式近场监听音箱,竟然能够从1974年至1998年间共生产了24年,总产罩超过十万对,至今仍然有获得认证的复刻版面世,可谓缔造了音响界一个永不熄灭的神话。然而,目前市场上有这么一个品牌,