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\begin{document} # [- p7 \# E8 [# F5 S' m\begin{CJK*}{GBK}{hei} ( Q: F3 w' V: S * t4 z: d" p5 ~: f\begin{center}+ a5 r6 W1 L1 a" f# R" a) J
{\Large 标题}" j$ F# o: R$ ^: Z5 M. L' N
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\begin{CJK*}{GBK}{song} # M7 r& r+ W2 N2 R* H1 H3 n+ V\begin{center} # v7 T1 }$ C# S! W3 N' ~, ` ?$ v$ \5 i% k$ X# D9 u
摘要 # M! j' g. E3 B% e, g: G: c\end{center}3 v9 ? ?1 Z! q J. ?5 b7 b, j
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这个问题是个数学建模问题 % [' K6 f1 {4 H* |4 P& v, B* _: e& P' E 9 s1 J0 Y9 |) v: Q g0 }7 f5 O/ Y1 V\newpage 2 E, {5 {/ ]4 O. p5 L& @- [, [& x+ P7 G3 K; Q5 c! ^+ h
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\section{问题的重述} $ R8 A% K' Q+ k8 D( {0 b5 t\end{CJK*} * _) ?( s4 O7 D; b! e5 l9 t. c1 r c: E: l2 T/ d
这个问题是一个数学建模问题! }# I* d: |0 q8 y
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\section{问题的分析} 2 H/ G" b/ r/ V N- [\end{CJK*} % c- ^' v9 z# e. d$ m. q7 w ) a- |8 L0 f) W问题的分析 0 g+ j& Q, _- ?) z3 @+ c% K) X\section{符号声明与名词解释} - e: Y6 d" n7 ^符号声明与名词解释 ! ]5 \5 o; M9 }\section{模型的建立}9 T2 h, `$ J! t2 i4 Q9 C& w8 q6 T& v$ ^
\begin{CJK*}{GBK}{kai} / ?# |4 r9 @, [3 F5 c\newtheorem{fangfa}{方法} . H- ^; \) E% N8 @, ]. W% C\newtheorem{dingli}{定理} 9 P! Y. C! v; v) ^- ^& Y2 o\begin{fangfa}' f. j8 Z/ S" }* _5 q
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\section{模型的求解} 7 x9 Z! J% O8 u) J" t* ~- Z\begin{equation} ' l; o, |* y! g( ] _\iiint_{\Omega}\left( \frac {\partial P}{\partial x}+\frac {\partial Q}{\partial y}+\frac {\partial R}{\partial z}\right)! l9 c" c I9 Z( R3 h' f
dv =\mathop{{\int\!\!\!\!\!\int}\mkern-21mu/ l* N3 n) E8 `2 z
\bigcirc}\limits_\Sigma ; Z8 A1 k. J4 C2 k2 Q: D( _ {" ]{Pdydz+Qdxdz+Rdxdy} \label{Gauss} 0 {2 F- |7 G! u: r\end{equation}, H5 E5 \( {2 e0 x( c, {
% n% r+ E e2 D& Y7 T 6 F! t7 B0 z5 [\begin{thebibliography}{99}# P; t6 a) d1 |3 B( ^
3 H+ M. b* V v5 `9 A9 o9 S! ` 2 t" D/ [, s( F$ _# ~1 S. Q\bibitem {leastlose} S.Jay Gould,( p$ Z' C: m6 y7 O' I& |8 U
“Of bamboos,cicadas and the economy of Adam Simith”, \emph{In3 m2 t. |$ ~9 `) J! N
Ever Since Dawin}, Norton 1977 ( H. k$ W+ ?& y& W1 Z$ F3 @\end{thebibliography}3 ~# R" }& |& S