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IntroductionInthecourseofneedleservice ,therearethreepairsoffric tion,whicharemadebetweenneedleandfabric ,tongueandgroove,footandtriangle Themainfailureforsewingneedlesisabrasive Therefore ,wearresistanceisoneofthemostimportantfactorsforsewingneedlestoinf… 相似文献
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Li Tongshuang 《河北大学学报(自然科学版)》1997,(1)
StudiesoftheSynthesisofBiomarkers(Part15〔1〕)Synthesisof1,3-Eicosanedioland1,3-Octacosanediol*LiTongshuang(DepartmentofChemist... 相似文献
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Li Kunpei Sun Min Yan Yinhong School of Life Science Southwest Normal University Chongqing Chongqing Institute of Crop Chongqing 《西南师范大学学报(自然科学版)》1999,(5)
pomoeabatatasLam.belongestothegenusIpomoeaofConvolvulaceae.Itsflowerapparatusismonoecism.Theovaryconsistesoftwoloculesandfourovules.Eachcapsulecontains1to4seeds.Itwasreportedthattheovaryinsomecrossingcombinationshad3loculesand6ovules.Eachcapsulecont… 相似文献
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IntroductionPhotosystemⅡ (PSⅡ )ofhigherplantsisamembraneproteincomplexlocatedinthethylakoidmembrane ,whichconsistsofmorethan 2 0proteins[1] .Itusessolarenergytocarryouttheprimary processesof photosynthesis :chargeseparation ,quinonereduction ,andwateroxidationt… 相似文献
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Current Application of Search Engines and Their Developing Trend 总被引:2,自引:0,他引:2
IntroductionWorldWideWebisoneofthemainservicesonInternet.In1991,thefirstWebsoftwareisworkedoutinordertoaffordasharedtoolofachievementandgroupinformationforitsphysicistsinCERNinSweden .Fromthenon ,thewebtechnologyanditsapplicationsareexpandingatanamazingsp… 相似文献
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Fine Structure of Regenerated Silk Fibroin Solids 总被引:1,自引:0,他引:1
IntroductionSilkfibroin (Bombyxmori)isthepolymerwithtwokindsofcrystalstructure,silkⅠandsilkⅡ[1,2 ] .ThespaceconformationofsilkⅠtakesontheshapeofcrookedhandle ,theintermediateformbetweenα spiralstructureandβ foldedstructure ,andthatofsilkⅡisanti parallelβ folde… 相似文献
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IntroductionTherearemanyconstitutiveequationsforviscoelasticfluids,amongwhichOldroydB,GiesekusandPTT(PhanThienTanner)modelsarewidelyused.Allthesemodelsareanalogoustothespringdashpotmechanicalsystem.Themathematicalbasisofthesemechanicalmodelsisexplainedb… 相似文献
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宋发富 《曲靖师范学院学报》2001,20(4):85-91
I.IntroductionThepurposeoftheessay ,accordingtothewriter,is“todemonstratethatlogic,farfrombeingadry ,pedanticsubject,isaliving ,breathingthing,fullofbeauty,passion ,andtrauma .”ThestoryissetinalawschoolattheuniversityofMinnesota,U .S .A .Theprotagonist,aself -con… 相似文献
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TheStructuralFeatureofEssentiallyDisconnectedCoronoidSystemsChenRongsi(陈荣斯)(CollegeofFinanceandEconomics,FuzhouUniversity,Fuz... 相似文献
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IntroductionChitin ,poly [(1→ 4)NacetylβDglucosamine],isanaturallyabundantpolysaccharideandisoneofthemostimpor tantmaterialsinNature.Coastalareaisamplitudeinourcountryandshrimps ,crabsorothershellfisharecapturedinverylargeamount.Besidestheediblemeat,thereiss… 相似文献
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《河北大学学报(自然科学版)》1997,(1)
UltrastructureofHepatopancreasCelsofMacrobrachiumnipponensisWangWeinaWangAnliWeiXuanhuiGuoMingshen(DepartmentofBiology,HebeiU... 相似文献
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Itknownthatsmallamountsoffluxonthesurfaceofstainlesssteelcanincreasethedepthofweldpene trationinTIGweldingbyafactorofthree[1] .Thisprocessisreferredtoas”ATIG”orTIGweldingacti vatedbyflux .Therehavebeenthreepublishedphys icalmechanismsthatarepossiblecontri… 相似文献
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Ma Shu |hua Wang Dun |cheng Shen Bei |fen Wang Sheng |qi . Institute of Radiation Medicine Academy of Military Medical Sciences B eijing . Institute of Basic Medical Sciences Academy of Military Medical Sciences Beijing 《武汉大学学报:自然科学英文版》2003,8(1):125-129
0 IntroductionLarge scalesequencingandtheapplicationofexpressedsequencetag(EST)technologyhasledtotheidentificationofhundredsandthousandsofgenomicsequencesfromvariousmicrobestomulticellulareukaryotesandplants[1,2 ] .ExpressionanalysisofeachknowngeneorESTusi… 相似文献
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Zhong Ning 《西南师范大学学报(自然科学版)》1996,(5)
Astudyofpsychologicalcharacteristicsofmoderndanceandlatindance¥ZhongNing(DepartmentofMusicalEducation,SouthwestChinaNormalUni... 相似文献
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Takingapanoramicviewofthetwistywayaboutthedevel opmentofthenon governmentalenterprisesofscienceandtechnol ogy (NGEST)inourcountry ,wehavenoticedtheindomitablevi talityandirresistiblepoweroftheseenterprises.NGESTworkwell,because,asasystem ,theirfunctioncomes… 相似文献
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ThestudyonthespacedensitydistributionofAg-UltrafineparticlesDengZhaojing,LiangYiping,LiJian,RenHongxiang(DepartmentofPhysics,... 相似文献
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Yang Huajun male years old master of science. Yang Huajun Yang Qingyuan Qiu Daochi Department of Urban Science Environment Resources Southwest China Normal University 《西南师范大学学报(自然科学版)》1998,(5)
Inthelatetenyears,inChina,withthelandpayingusinginstitutiongoingon,manycitieshavesetthecitylandbasepriceonthebasisofTheoperat... 相似文献