曲底 meaning in Chinese

curved bottom

The general forms of the transformed new equation and the coefficients are also given . numerical simulations show that it can be efficiently used in solving the helmholtz equation
数值模拟表明，适当地选取某些非线性局部正交变换来求解在曲底区域中的helmholtz方程，确实可以改善数值求解的效率。
In solving the helmholtz equation in the acoustical waveguides with a curved bottom , slow convergence may occurs when the linear local orthogonal transformation is adopted . in this paper , a class of nonlinear local orthogonal transformations ( nlot ) is proposed . it is an approach to improve the slow convergence mentioned above
本文尝试通过在深度方向选取非线性局部正交变换，将曲底求解区域化为平坦求解区域，然后求解helmholtz方程的办法，来改善用线性(深度方向)局部正交变换时，步进求解时会出现的局部收敛慢的问题。