贝塞尔函数

The phase of the first kind zero-order Bessel function has binary values,zero and π,thus,the distribution of amplitude of vibration can be measured through the phase of reconstructed wave.

第一类零阶贝塞尔函数相位只有0和π两个取值，所以利用再现光场的相位可以确定振幅分布。

Applying the theory of Bessel function, the exact transfer matrix formulae of the asymmetric free vibration of the circular and annular plate elements with uniform thickness can be obtained.

应用贝塞尔函数理论，求得等厚度圆板和环板单元非对称自由振动传递矩阵的正确公式。

Cladding field has been constructed by using the accurate functional form with two approximate parameters:the transverse decay constant in the cladding and the field value at core-cladding interface,which are already known.

包层场用修正贝塞尔函数以及已经求得的两个参量：包层径向衰减常量和场在纤芯-包层界面上的值重新构建。

Theoretical analysis was carried out to achieve the analytical expression for Doppler shift and amplitude of liquid surface wave.

对此进行了理论分析，得到了多普勒频移与液体表面波振幅之间的解析关系式，并利用贝塞尔函数分析了频谱分析图中解调出低频液体表面波频率的可行性，设计并实现了一套液体表面波多普勒相干检测的实验装置。

According to Bessel function and Fourier series theory, generation, magnitude and distribution of voltage harmonic generated by single-phase two-level SPWM inverter and three-phase SPWM inverter are analyzed and calculated particularity and concretely in allusion to inverter-motor system.

然后针对逆变器-电动机系统，利用贝塞尔函数和傅里叶级数理论，分别对单相二阶SPWM逆变器和三相SPWM逆变器的输出电压谐波的产生、大小和分布进行了细致而具体的分析和计算。

All the most commonly used special functions are included: Bessel functions, Fresnel integrals, etc.

所有最常用的特殊功能包括：贝塞尔函数，菲涅耳积分等

The analytical expression of a kind of integral including the product of the sums of two Bessel functions is given for the power calculation.

六、根据研究工作数值计算的需要，给出了一类包含有两个贝塞尔函数的和的积的积分公式。

Making convenience of computation, the calculation method of the spherical Bessel functions for complex arguments is presented.

为便于计算，给出了复宗量的球贝塞尔函数的计算方法。

It may be shownthat the intensity distribution in the diffraction pattern of a series of points equally spaced along a helix is given by the squares of Bessel functions.

这可能是显示的强度分布的衍射图样的一系列点同样距离的沿螺旋给予的平方贝塞尔函数。

Diffraction by helices It may be shownthat the intensity distribution in the diffraction pattern of a series of points equally spaced along a helix is given by the squares of Bessel functions.

衍射螺旋这可能是显示的强度分布的衍射图样的一系列点同样距离的沿螺旋给予的平方贝塞尔函数。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。