布羅爾-庫普方程組

布羅爾-庫普方程（Broer-Kaup equation）是一二元個非線性偏微分方程組：^[1]

${\displaystyle u_{y,t}+(2*u*u_{x})_{x}+2*v_{xx}-u_{xxy}=0}$

${\displaystyle v_{t}+2*(vu)_{x}+v_{xx}=0}$

解析解

${\displaystyle u(x,y,t)=-(1/2)*_{C}4*(2*_{C}3+_{C}2)/(_{C}2*(_{C}3+2*_{C}2))+_{C}2*cot(_{C}1+_{C}2*x+_{C}3*y+_{C}4*t),v(x,t)=-(1/4)*(2*_{C}2^{4}*_{C}3^{3}+10*_{C}2^{5}*_{C}3^{2}+16*_{C}2^{6}*_{C}3+8*_{C}2^{7}-_{C}2*_{C}4^{2}*_{C}3^{2}-_{C}2^{2}*_{C}4^{2}*_{C}3+_{C}2^{3}*_{C}4^{2}+_{C}4^{2}*_{C}3^{3})/(_{C}2^{3}*(_{C}3^{2}+4*_{C}3*_{C}2+4*_{C}2^{2}))+(1/2)*_{C}4*(-_{C}3^{2}+_{C}2^{2})*cot(_{C}1+_{C}2*x+_{C}3*y+_{C}4*t)/(_{C}2*(_{C}3+2*_{C}2))+(-(1/2)*_{C}3*_{C}2-(1/2)*_{C}2^{2})*cot(_{C}1+_{C}2*x+_{C}3*y+_{C}4*t)^{2}}$

${\displaystyle u(x,y,t)=-(1/2)*_{C}4*(2*_{C}3+_{C}2)/(_{C}2*(_{C}3+2*_{C}2))+_{C}2*coth(_{C}1+_{C}2*x+_{C}3*y+_{C}4*t),v(x,t)=(1/4)*(2*_{C}2^{4}*_{C}3^{3}+10*_{C}2^{5}*_{C}3^{2}+16*_{C}2^{6}*_{C}3+8*_{C}2^{7}+_{C}2*_{C}4^{2}*_{C}3^{2}+_{C}2^{2}*_{C}4^{2}*_{C}3-_{C}2^{3}*_{C}4^{2}-_{C}4^{2}*_{C}3^{3})/(_{C}2^{3}*(_{C}3^{2}+4*_{C}3*_{C}2+4*_{C}2^{2}))+(1/2)*_{C}4*(-_{C}3^{2}+_{C}2^{2})*coth(_{C}1+_{C}2*x+_{C}3*y+_{C}4*t)/(_{C}2*(_{C}3+2*_{C}2))+(-(1/2)*_{C}3*_{C}2-(1/2)*_{C}2^{2})*coth(_{C}1+_{C}2*x+_{C}3*y+_{C}4*t)^{2}}$

${\displaystyle u(x,y,t)=-(1/2)*_{C}4*(2*_{C}3+_{C}2)/(_{C}2*(_{C}3+2*_{C}2))-tan(_{C}1+_{C}2*x+_{C}3*y+_{C}4*t)*_{C}2,v(x,t)=-(1/4)*(2*_{C}2^{4}*_{C}3^{3}+10*_{C}2^{5}*_{C}3^{2}+16*_{C}2^{6}*_{C}3+8*_{C}2^{7}-_{C}2*_{C}4^{2}*_{C}3^{2}-_{C}2^{2}*_{C}4^{2}*_{C}3+_{C}2^{3}*_{C}4^{2}+_{C}4^{2}*_{C}3^{3})/(_{C}2^{3}*(_{C}3^{2}+4*_{C}3*_{C}2+4*_{C}2^{2}))-(1/2)*_{C}4*(-_{C}3^{2}+_{C}2^{2})*tan(_{C}1+_{C}2*x+_{C}3*y+_{C}4*t)/(_{C}2*(_{C}3+2*_{C}2))+(-(1/2)*_{C}3*_{C}2-(1/2)*_{C}2^{2})*tan(_{C}1+_{C}2*x+_{C}3*y+_{C}4*t)^{2}}$

${\displaystyle u(x,y,t)=-(1/2)*_{C}4*(2*_{C}3+_{C}2)/(_{C}2*(_{C}3+2*_{C}2))+tanh(_{C}1+_{C}2*x+_{C}3*y+_{C}4*t)*_{C}2,v(x,t)=(1/4)*(2*_{C}2^{4}*_{C}3^{3}+10*_{C}2^{5}*_{C}3^{2}+16*_{C}2^{6}*_{C}3+8*_{C}2^{7}+_{C}2*_{C}4^{2}*_{C}3^{2}+_{C}2^{2}*_{C}4^{2}*_{C}3-_{C}2^{3}*_{C}4^{2}-_{C}4^{2}*_{C}3^{3})/(_{C}2^{3}*(_{C}3^{2}+4*_{C}3*_{C}2+4*_{C}2^{2}))+(1/2)*_{C}4*(-_{C}3^{2}+_{C}2^{2})*tanh(_{C}1+_{C}2*x+_{C}3*y+_{C}4*t)/(_{C}2*(_{C}3+2*_{C}2))+(-(1/2)*_{C}3*_{C}2-(1/2)*_{C}2^{2})*tanh(_{C}1+_{C}2*x+_{C}3*y+_{C}4*t)^{2}}$

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行波圖

布羅爾-庫普方程具有亮孤波、暗孤波和扭型孤波。

Broer-Kaup equation traveling wave plot

Broer-Kaup equation traveling wave plot

Broer-Kaup equation traveling wave plot

Broer-Kaup equation traveling wave plot

Broer-Kaup equation traveling wave plot

Broer-Kaup equation traveling wave plot

Broer-Kaup equation traveling wave plot

Broer-Kaup equation traveling wave plot

參考文獻

1. 閻振亞著 《複雜非線性波的構造性理論及其應用》 第65頁 科學出版社 2007年

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2. 李志斌編著 《非線性數學物理方程的行波解》 科學出版社
3. 王東明著 《消去法及其應用》 科學出版社 2002
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5. Graham W. Griffiths William E.Shiesser Traveling Wave Analysis of Partial Differential p135 Equations Academy Press
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8. Eryk Infeld and George Rowlands,Nonlinear Waves,Solitons and Chaos,Cambridge 2000
9. Saber Elaydi,An Introduction to Difference Equationns, Springer 2000
10. Dongming Wang, Elimination Practice,Imperial College Press 2004
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12. George Articolo Partial Differential Equations & Boundary Value Problems with Maple V Academic Press 1998 ISBN 9780120644759