简介:摘要本文围绕低压智能MCC项目罗克韦尔E300电子过载继电器与霍尼韦尔DCS(HoneywellC300)系统通讯问题做了简单描述,自动化DCS系统采用HoneywellC300的系统通过ModbusTCP/IP转EtherNet/IP的Beacon网关与E300进行通讯。前期由于设置等问题导致不能正常通讯,经研究通过测试,本文设置方法解决了根本问题。
简介:《斯巴达300勇士》是根据漫画大师FrankMiller的同名漫画改编的史诗巨片。公元前480年,斯巴达国王Leonidas率领300勇士,在没有祭司祝福,没有议会同意的情况下,独自前往位于斯巴达北部的温泉关(theHotGates)阻击波斯国王Xerxes的十余万大军。300勇士浴血奋战,将波斯大军阻挡在塞尔莫皮莱山口两天两夜。但由于奸细的出卖,300勇士战斗到最后一刻,在波斯大军的箭雨之下湮没在了温泉关,但希腊的各个城邦最终联合起来,勇敢地面对共同的侵略者。最后波斯被击退,希腊终于赢得了胜利。直到今天,斯巴达勇士的"荣誉,责任,光荣,作战和胜利"的信条依然感天动地,300斯巴达勇士让温泉关一役传颂千古。
简介:Theannualseriesofδ13CweremeasuredintreeringsofthreeCryptomeriafortuneidisks(CF-1,CF-2,andCF-3)collectedfromWestTianmuMountain,ZhejiangProvince,China,accordingtocross-datingtreeringages.Therewasnoobviousdecreasingtrendoftheδ13CannualtimeseriesofCF-2before1835.However,from1835to1982thethreetreeringδ13Cannualseriesexhibitedsimilardecreasingtrendsthatweresignificantly(P≤0.001)correlated.Thedistributioncharacteristicsofascatterdiagrambetweenestimatedδ13CseriesofCF-2frommodelingandtheatmosphericCO2concentrationextractedfromtheLawDomeicecorefrom1840to1978wereanalyzedandacurvilinearregressionequationforreconstructingatmosphericCO2concentrationwasestablishedwithR2=0.98.Also,atestofindependentsamplesindicatedthatbetween1685and1839thereconstructedatmosphericCO2concentrationusingtheδ13CseriesofCF-2hadacloserelationshipwiththeLawDomeandSipleicecores,withastandarddeviationof1.98.ThegeneralincreasingtrendofthereconstructedatmosphericCO2concentrationcloselyreflectedthelong-termvariationofatmosphericCO2concentrationrecordedbothbeforeandaftertheIndustrialRevolution.Between1685and1840theevaluatedatmosphericCO2concentrationwasstable,butafter1840itexhibitedarapidincrease.Givenalongerδ13Cannualtimeseriesoftreerings,itwasfeasibletorebuildarepresentativetimeseriestodescribetheatmosphericCO2concentrationforanearlierperiodandforyearsthatwerenotintheicecorerecord.
简介: 小故事大哲学家苏格拉底的学生向他求教,怎样才能修到他那样精深的学问,苏格拉底听后并未直接作答,只是说:"我向大家倡议做一件最简单也是最容易的事,每个人尽量把胳膊往前甩,然后尽量往后甩.……
简介:公元前480年8月,骄阳炙烤着大地。一位全副武装的中年汉子站在希腊北部德摩比利隘口的山岸上,神情冷峻地眺望着海岸。他就是斯巴达国王列奥尼达。
简介:Radiotherapyisacommontreatmentmodalityforheadandneckcancers,nasopharyngealcancers,primarybraintumorsandbrainmetastases.Alargenumberofpatientsintheworldwithprimaryormetastaticbraintumorswillrequirelargevolumeorwholebrainirradiationeveryyear.However,therapeuticirradiationnotonlykillstumorcells,butalsoinjuresnormalbraintissue,whichiscommonlyassociatedwithsignificantfunctionalmorbidityanddecreasedqualityoflifeinpatientstreatedwithbrainradiotherapy[1].
简介:亲爱的读者朋友们,今年第10期盆景赏石版,将是我们《花木盆景》杂志出版的第300期。自1984年创刊以来,24年间,本刊得到了广大读者和作者的大力支持。值