首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   55篇
  免费   0篇
教育   55篇
  2013年   1篇
  2003年   32篇
  2002年   1篇
  2001年   18篇
  2000年   2篇
  1999年   1篇
排序方式: 共有55条查询结果,搜索用时 0 毫秒
31.
NTRODUCTIONTemperaturefieldchangewillproducether malstressesinstructures.Itiswellknownthatdifferentmaterialsgeneratedifferentstressre sponses ,andthatinsomecases,thermalstress esarelargeenoughtocausestructurefailure .Soitismeaningfulandimportanttostudydy…  相似文献   
32.
INTRODUCTIONAfterthedepositionofMunicipalSolidWaste(MSW) ,thebiodegradableorganicfractionun dergoesaseriesofchemicalandbiochemicaldegradation .Basedontheanalysisoftheemit tedgases,fivedistinctphasesofthelandfillanaerobicdegradationprocess,(i.e.,initialadj…  相似文献   
33.
INTRODUCTIONFibroblastgrowthfactor (FGF)isanangio genicandmitogenicpolypeptidethatcanpromotecellproliferationanddifferentiationinawideva rietyofcelltypes (Goldfarb ,1 990 ;Basilicoetal.,1 992 ) .TheFGFfamilyhasmanymemberswithsimilaraminoacidsequenceandbiologicala…  相似文献   
34.
NTRODUCTIONDiscardednon degradableplasticfilmswide lyusedinfoodpackagingcause“whitepollu tion”totheenvironment.Inrecentyears,theus  相似文献   
35.
INTRODUCTIONAntcolonyalgorithms (Hertz ,etal.,2 0 0 0 ) ,investigatedsystematicallyatfirstinDorigo’sPh .D .dissertation ( 1 992 )astheimi tationofthefood seekingbehaviorinantsociet ies,haveattractedthegreatattentionofre searchersincomprehensivefieldsofsystemopti mizat…  相似文献   
36.
INTRODUCTIONCable stayedbridgesarewidelyappliedinmodernbridgestructuralsystem .Thelargestspanofcable stayedbridgeiscloseto 1 0 0 0mwhenmanynewmaterialsandtechnologiesareapplied.Thestaycablesareimportantbridgestructurecomponentsmostpronetoexhibithighamplitu…  相似文献   
37.
INTRODUCTIONManynonlinearproblems ,suchasnonlinearellipticboundaryvalueconditions,integrationequationinradicaltransfer,optimalsolutioninoperatortheory ,canbededucedtosolvetheequationf(x) =0 ,( 1 )wheref:X→YisaFrechetdifferentiablenon linearoperatorwhichmapsBan…  相似文献   
38.
INTRODUCTIONTheentomophthoraceousfungus,Zoophthoraanhuiensis (Li)Humber,isanaphid specificpathogenonlyknownfromChina .Thisfungalpathogenplaysanimportantroleinthenaturalcontrolofaphidpopulationsinthemiddle lowerreachoftheChangjiangRiverduringautumnandwint…  相似文献   
39.
INTRODUCTIONPhaseconjugationviastimulatedBrillouinscattering (SBS)iswidelyusedinMOPAsystemofpulsedsolid statelasers (Eichleretal.,1997a ;1998;2 0 0 0 ;Offerhausetal.,1996)andothertypesoflasers (Eichleretal.,1996;Kurnitetal.,1989;Filippoetal.,1992 )tocompe…  相似文献   
40.
INTRODUCTIONWewillfirstrecallsomealgebraicdefinitionsthatwillbeusedinthepaper.AhyperstructureisasetHtogetherwithafunction·∶H×H→P  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号