ࡱ> VXU9 R bjbj=H l  LLL8LL M;(  {#>## :::::::$a= ?X:] #-"N{###:M+ ;M+M+M+#Z  :M+#:M+M+,R08 9 HW L($99;0M;B9?*<?9M+ XH @[ ~ MACROBUTTON DoFieldClick [[~]  O[t^P MACROBUTTON DoFieldClick [Xt^]  -NVwl'Yf[] zUxXNNf[MOe  MACROBUTTON DoFieldClick [f[MOe-Nev]   ] zW MACROBUTTON DoFieldClick [] zW Ty] W{QeT MACROBUTTON DoFieldClick [xvzeT] Ux X u MACROBUTTON DoFieldClick [\OY T] c[Ye^ MACROBUTTON DoFieldClick [[^Y TLy ]  eQf[eg MACROBUTTON DoFieldClick [XXXX] t^ MACROBUTTON DoFieldClick [XX] g e[beg MACROBUTTON DoFieldClick [XXXX] t^ MACROBUTTON DoFieldClick [XX] g  MACROBUTTON DoFieldClick [Title]  Thesis Submitted to China University of Petroleum in partial fulfillment of the requirement for the degree of Engineering Master by  MACROBUTTON DoFieldClick [The Name of Postgraduate]  ( MACROBUTTON DoFieldClick [Subject] ) Tutor: MACROBUTTON DoFieldClick [Professor LI Jing-hai]   MACROBUTTON DoFieldClick Month ,  MACROBUTTON DoFieldClick Year  r R '` X f ,gNXf@bHTNve/fb*NN(W[^c[ 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& & & & & & & & & & & &  = 4 \* ROMAN IV MR & & & & & & & & & & & & & & & & & & & & & & & & 1 ,{xz MACROBUTTON NoMacro ;USQdkY.eQxzh= & & & & & & & & & & & & & & & & 69 x.1 MACROBUTTON NoMacro ;USQdkY.eQxzh= & & & & & & & & & & & & & & & & 71 x.2 MACROBUTTON NoMacro ;USQdkY.eQxzh=& & & & & & & & & & & & & & & & 72 x.2.1 MACROBUTTON NoMacro ;USQdkY.eQxzh=& & & & & & & & & & & & & & & 74 x.2.2 MACROBUTTON NoMacro ;USQdkY.eQxzh= & & & & & & & & & & & & & & 76 ,{yz ~ & & & & & & & & & & & & & & & & & & & & & & & & 79 &{Sh& & & & & & & & & & & & & & & & & & & & & & & & & & & 81 Se.s & & & & & & & & & & & & & & & & & & & & & & & & & 86 DU_A& & & & & & & & & & & & & & & & & & & & & & & & & & & 89 A.1MACROBUTTON NoMacro ;USQdkY.eQxzh=& & & & & & & & & & & & & & & & 90 A.1.1MACROBUTTON NoMacro ;USQdkY.eQxzh=& & & & & & & & & & & & & & 91 "& & & & & & & & & & & & & & & & & & & & & & & & & & & 99 *NN{S0(Wf[gvxvzbg& & & & & & & & & & & & & & & & 100      PAGE 10 [~R:N~[0:g[0y[ N~ 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