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1eBook(2)232003-7-1FANQin-Shan’sEducation&TeachingStudio22312341l30)(=ifrani,,2,1L=s,,2,1L=a0),,(=iiizyxfairi),,(iiiizyx=ralt0)(=ifrani,,1L=s,,1L=at0),(=tfirani,,1L=s,,1L=a0)(=ifrani,,1L=s,,1L=a0)(≤ifra0)(≥ifrani,,1L=s,,1L=a0)(=ifra0),(=irr&ifani,,1L=s,,1L=a40),(=irr&ifani,,1L=s,,1L=a2qn,,2,1LssnN-=3n3n3n3l12r,,,,iinδ=Lriδirdirdtdriδ5δ()12,,,jqjNδ=Ljqδjq12,,,,jqjNδ=LlWFrFrWδ=⋅δ),,2,1(niiL=F11FrnniiiiiW==δ=⋅δ∑∑Mqd;WMqδ=δ),,2,1(mrMrL=,rqd11mmjjjjjWMq==δ=δ∑∑jqδrMWδFrii⋅δ46N10Frniii=⋅δ=∑NFii5n10FrniiiW=δ=⋅δ=∑iFiriδnm110FrnmiijjijWMq==δ=⋅δ+⋅δ=∑∑iFriδjMjjqδ6()12ir,,,inδ=L7ird()12,,,jqjNδ=LiFird()10nxiiyiiziiiFxFyFz=δ+δ+δ=∑()1cos0F,rniiiiiFs=δδ=∑isδiisδjqδ()12,,,iNsfqqqδ=δδδLjqdjqd1823l()1,,jqjNδ=L1012110,jjNqqqqq+δ=δ=δ==δ==δ=LLNlN49(2)eBook23