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木虫 (小有名气)

[求助] 雅克比椭圆ellipj 已有2人参与

雅克比椭圆[SN,CN,DN] = ellipj(U,M) 其中M是什么?周期是与M有关系。
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木虫 (小有名气)

U=omega*time
M=模数的平方
4楼2017-04-11 10:34:14
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FMStation

至尊木虫 (知名作家)

【答案】应助回帖

感谢参与,应助指数 +1
[SN,CN,DN] = ellipj(U,M) returns the Jacobi elliptic functions SN, CN, and DN
evaluated for corresponding elements of argument U and parameter M.
Inputs U and M must be the same size, or either U or M must be scalar.

https://www.mathworks.com/help/matlab/ref/ellipj.html
2楼2017-04-06 15:48:51
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FMStation

至尊木虫 (知名作家)

【答案】应助回帖

Elliptic functions are functions of two variables.
The first variable might be given in terms of the amplitude φ, or more commonly, in terms of u given below.
The second variable might be given in terms of the parameter m, or as the elliptic modulus k,
where k2 = m, or in terms of the modular angle α, where m =  sin2 α.
https://en.wikipedia.org/wiki/Jacobi_elliptic_functions
3楼2017-04-06 15:51:23
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