With the use of ap - proximate zero order Bessel's function, we developed a fast approximate method to speed up the decomposition of plane wave, with its error analysed.
为了提高平面波分解的运算速度，本文借用零阶Bessel函数近似形式提出了一种快速的近似算法，并进行了误差分析。
Discusses the particular solution of m-Bessel equation when m is zero or positive integer which is the primal Bessel function, and solve the approximation of m Bessel function with polynomial forms and FORTRAN algorithm.
探讨了m阶Bessel方程当m为零或正整数时的特解即第一类Bessel函数的形式及其函数值的近似计算问题，并以多项式逼近和FORTRAN语言算法予以解决。
The dark fringes in the photographs represent the roots of the first Bessel function of zero order.
在这些照片上，可以由条纹分布给出一类零阶贝塞尔函数的根值。
One is single-cone sampling tomosynthesis which corresponds to the zero order Bessel window function.
一种是以零阶贝塞尔函数为窗函数，采用单个的采样园锥。
Meanwhile, the correlation function between the symbols can be approximated as zero order Bessel function.
两符号间的相关性可近似为零阶贝塞尔函数。
The time-averaged speckle pattern of vibration can be described as a zero-order bessel function by high frequency modulation.
用数字散斑干涉术时间平均法测得的物体表面稳态振动，可描述为受高频分量调制的零阶Bessel函数。
According to the corresponding relationship between vibration blurred image and static image in frequency domain that is a set of negative ripples appears in spectrums of blurred image corresponding to zero values of the zero order Bessel function a direction and amplitude measurement method is introduced.
根据振动模糊图像和静止图像在频谱上存在的对应关系，即振动模糊图像频谱存在着对应于零阶贝塞尔函数零点的暗纹（贝塞尔条纹）；
Chebyshev Approximation of the Second Kind of Modified Bessel Function of Order Zero
第二类变型Bessel函数的Chebyshev逼近
In this paper, the eigenvalue and eigenfunction are obtained by Bessel function and Legendre Polynomail on sphere coordinates and imply eigenvalue by a class of zero points of calculation.
本文用球坐标，利用Bessel函数和Legendre多项式给出特征函数表达式，并用一族级数的零点来表示特征值。
Utilizing an approximate formula of the first kind zero-order modified Bessel function I 0 (x), an approximate closed form of cumulative distribution function (CDF) of a Rice random variable (RRV) is worked out.
应用第一类零阶修正的贝塞尔函数I0（x）一个近似式，推导Rice随机变量的概率分布函数（CDF）的近似闭式。
Moreover, the quasi-analytical expressions of the relative concentrations at the mobile region and the immobile region are deduced respectively by using Bessel equation, Bessel function and the method of Laplace transform under the initial concentration zero and the first or second boundary condition of a semi-infinite one-dimensional space.
并分别在初始浓度为零，半无限一维空间内第一类边界条件和第二类边界条件下，利用Bessel方程、Bessel函数和Laplace变换法推导出了可动区和不动区溶质相对浓度的准解析表达式。