简介:
简介:WiththedevelopmentofWeb2.0,moreandmorepeoplechoosetousetheInternettoexpresstheiropinions.Allthisopinionstogetherintoanewformtextwhichcontainsalotofvaluableemotionalinformation,thisiswhyhowtodealwiththesetextsandanalysistheemotionalinformationissignificantforus.Wegetthreemaintasksofsentimentanalysis,includingsentimentextraction,sentimentclassification,sentimentapplicationandsummarization.Inthispaper,basedontheRsoftware,weintroducedthestepsofsentimentanalysisindetail.Finally,wecollectthemoviereviewsfromtheInternet,anduseRsoftwaretodosentimentanalysisinordertojudgetheemotionaltendencyofthetext.
简介:摘要目的对心房颤动伴长R-R间期动态心电图分析研究。方法随机选取我院救治的心房颤动伴长R-R间期患者57例,做为研究对象,进行24h动态心电图监测。对这57例患者随机分配两组,命名为A、B。结果两组患者发生其他心律失常情况无明显差异,长R-R间期多在夜间发生,考虑与夜间迷走神经张力增高有关,但R-R间期的长短情况不能准确反应房室传导,但能反应f波隐匿传导。结论在进行心房颤动诊断合并房室传导阻滞的诊断中,需要将患者白天活动时的心室率、24h平均心室率和临床症状有机结合起来进行客观分析。准确判断心房颤动是否合并房室传导阻滞对于患者的临床治疗意义重大。
简介:LetB(E,F)bethesetofallboundedlinearoperatorsfromaBanachspaceEintoanotherBanachspaceF,B+(E,F)thesetofalldoublesplittingoperatorsinB(E,F)andGI(A)thesetofgeneralizedinversesofA2B+(E,F).InthispaperweintroduceanunboundeddomainW(A,A^+)inB(E,F)forA2B+(E,F)andA^+2GI(A),andprovideanecessaryandsufficientconditionforT2W(A,A^+).Thenseveralconditionsequivalenttothefollowingpropertyareproved:B=A^+(IF+(T??A)A^+)??1isthegeneralizedinverseofTwithR(B)=R(A^+)andN(B)=N(A^+),forT2W(A,A^+),whereIFistheidentityonF.Alsoweobtainthesmooth(C¥)diffeomorphismMA(A^+,T)fromW(A,A^+)ontoitselfwiththefixedpointA.LetS=fT2W(A,A^+):R(T)\N(A^+)=f0gg,M(X)=fT2B(E,F):TN(X)R(X)gforX2B(E,F)g,andF=fM(X):8X2B(E,F)g.UsingthediffeomorphismMA(A^+,T)weprovethefollowingtheorem:SisasmoothsubmanifoldinB(E,F)andtangenttoM(X)atanyX2S.ThetheoremexpandsthesmoothintegrabilityofFatAfromalocalneighborhooldatAtotheglobalunboundeddomainW(A,A^+).Itseemstobeusefulfordevelopingglobalanalysisandgeomatricalmethodindifferentialequations.
简介:日产和Italdesign首度合作打造了一辆全新的原型车——GT-R50概念车.它以2018日产GT-RNISMO量产车型为蓝本,旨在庆贺GT-R车型以及Italdesign的50周年纪念.日产汽车公司全球设计高级副总裁阿方索·阿尔拜萨(AlfonsoAlbaisa)表示:“你有多少次想要无拘无束地打造一辆GT-R,并真的着手去做?非常难得的是,两个重大的时刻发生了重叠,今年是Italdesign塑造汽车世界的第50个年头,也是日产通过标志性的GT-R激发兴奋的第50个年头,为了庆贺这一伟大的巧合,日产和Italdesign联手打造了这辆定制版的GT-R,以此彰显双方在工程技术上长达50年的领先地位.”GT-R50内外饰的设计由日产设计欧洲分部以及美国分部操刀,Italdesign则负责研发、工程调校以及建造该车.