| 8 | Chemistry 1,2,4-triazines--Mass spectrometry of 6-azapurines显示文摘FOR the purpose of finding novel antitumor and antivirus medicines and understanding themechanism of the metabolic process involved,several 6-azapurine derivatives were synthe-sized from 1,2,4-triazines.Mass spectrometry plays a key role in the structure | Shi, XL Hu, CF Yue, BZ Cai, MS Cheng, TM | 1997 | Chinese Science Bulletin1997，42，8： | 0 |
| 9 | FINITE ELEMENT ANALYSIS OF A LOCAL EXPONENTIALLYFITTED SCHEME FOR TIME-DEPENDENTCONVECTION-DIFFUSION PROBLEMS显示文摘1.IntroductionConsiderthetime-dependentconvection-diffusionproblemat--Euzx+a(x,t)u.+b(x,t)u^f(x,t),(x,t)E[0,1]x[0,T](1.1)u(0,t)=u(1,t)~0,tE[0,T].(1.2)u(x,0)=u000,xE[0,1],(1.3)a(x,t)2or>0,(1.4)b(x,t)--a.(x,t)/220>0,(1.5)where0SE<<1'(1.1)-(1.5)canbereg... | Yue, XY Jiang, LS Shih, TM | 1999 | Journal of Computational Mathematics1999，17，3： | 0 |
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