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1.
通过构建适当的概率问题,利用必然事件的概率为1得到恒等式,这样也就完成了对恒等式的证明。  相似文献   

2.
对具有准递减限制的n阶排列进行了进一步的研究,用组合论证的方法给出了一个新的组合恒等式。  相似文献   

3.
利用组合数学的一些技巧给出了切比雪夫多项式的通项表达式,并得到了一些二项式系数,特殊三角函数值的恒等式。  相似文献   

4.
第二类stirling数的又一个恒等式   总被引:1,自引:0,他引:1  
证明一些恒等式,并给出了当n≥10时的第二类stirling数S2(n,n-5)的计算公式.  相似文献   

5.
采用弹塑性增量理论和各向异性问题中的Huber-Mises屈服准则,推出了复合材料层合扁壳弹塑性弯曲分析的加权残值法基本公式,用增量加载和初应力法求解。算例证明,该法收敛较快,具有较好的精度。  相似文献   

6.
IntroductionAir-GroundRanging(AGR)isaroutinetaskofairborneradar.Differentradarsystemsusedif-ferentmethodstoaccomplishAGR.Non-phase-coherentradarsystemusesthemethodofrangegatetotrackthezero-passingpointofthediffer-encesignalinordertoaccomplishAGR.Whil…  相似文献   

7.
IntroductionStampingtechniqueisthemainmeansinproduc-ingtheauto-body[1~3].Traditionally,dieisde-signedandproducedbytheskillfulengineers,dependingontheirexperienceandtrialtech-niquesandreferringtothedocumentofthesimi-lardies.Inaway,itisrandomtoarranget…  相似文献   

8.
IntroductionAir-poweredmotorshavetheadvantagesoflowcost,goodpower-to-weightratio,andintrinsi-calysafeoperation[1].Thesecharac...  相似文献   

9.
介绍了VF-Sepic-PFC电路的工作原理,提出了其主电路和控制电路的设计方法,样机设计和实验证明该方法的正确性。与通用的Boost-PFC电路相比,VF-Sepic-PFC电路无需专用IC,控制电路设计和调试简单;输出电压可以高于也可以低于输入电压峰值,易于实现输入输出隔离。  相似文献   

10.
ON A CONSTANT OF QUASICONFORMAL DEFORMATION   总被引:1,自引:0,他引:1  
IntroductionAcontinuousreal-valuedfunctionf(x)ontherealaxisRissaidtobelongtoZygmundclassΛ(R)ifitsatisfies‖f‖z=supx,t∈Rf(x+t)-2f(x)+f(x-t)t<+∞(1)Acontinuouscomplex-valuedfunctionF(z)iscalledaquasiconformaldeformationifithasgen-eralizedderivationFand…  相似文献   

11.
Earlyaftergram-negativebacteremia(GNB),defectiveregulationofendotoxin-inducedinflammatoryresponsesoftencul-minatesinprogressi...  相似文献   

12.
Uveoscleraldrainageofaqueoushu-mormeansthataqueoushumorpasses,fromanteriorchamber,throughtheinter-stitialspaceoftheciliarymus...  相似文献   

13.
IntroductionThesampled-dataH∞optimalcontrolproblemistominimizetheL2-inducednormfromthecon-tinuous-timedisturbancetothecontinu...  相似文献   

14.
Kashin-Beckdisease(KBD)isanen-demic,chronicosteoarthropathy.Themostofcase-controlstudiesandtrialsofpreventionforKBDinlatelytw...  相似文献   

15.
IntroductionThebucklingdistortionsareoftenobservedinathin-wallweldedstructure.Itisofimportancetopredictandpreventsuchdistortionscausedduringfusionwelding.Comparedwithtradition-alFEManalysis,thethermalandmechanicalbe-haviorsinweldinghavethefollowingch…  相似文献   

16.
Neurotrophin-3(NT-3)isamemberoftheneurotrophinfamilyofstructuralyrelatedproteins〔1〕.Thegeneofhumanneurotrophin-3(hNT-3)isloca...  相似文献   

17.
Tuberculosisofthepancreasisarareclinicalentity.Involvementofthegas-trointestinalsystemocursinabout12per-centofpatientswithmil...  相似文献   

18.
IntroductionForgivenpositiveintegersv,kandλ,abalancedincompleteblockdesignoforderv,blocksizekandindexλ,denotedB(k,λ;v),isapair(X,A)whereXisav-setandAisacollectionofk-sub-sets(calledblocks)ofXsuchthateach2-subsetofXiscontainedinpreciselyλblocks.Let(X,…  相似文献   

19.
Recently,studiesonpathogenofpregnancy-induced-hypertension(PIH)suggestedthatelevationofPFCa2+concentrationwasanimportantfactortoinducePIH.ThestudiesalsofoundthatthePFCa2+ofPIHpatientswasobvi-ouslyhigherthanthatofnormalpregnancy.Butthemasssamplestudyo…  相似文献   

20.
IntroductionTheimportanceofsampled-dataestimationorfilteringisincreasingbecauseoftherapiddevel-opmentinthetechnologyofdigital...  相似文献   

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