查询词典 Bessel

The formula stated that side heat exchange coefficient was a determinant factor of Bessel function's eigenvalue.

给出材料在调制光辐照下温度起伏量的理论公式，表明侧面热交换系数直接影响贝塞耳函数本征值的确定是一个必须考虑的因素。

In chapter 3, the linear approximate method of Bessel function for measuring nanometer vibration is studied. The error of linear approximate is analyzed and the theoretical measurement range of this method is given.

在此基础上，首次提出了一种双光路DSPI振动测量系统，利用退敏感光路使贝塞尔函数线性近似法的测量范围扩大了24倍，由近50nm增至1150nm。

In this paper, based on the Bessel function, an Ordinary Differential Equation was derived for time-domain Green function and its gradients in this paper. A new efficient calculation method based on solving ODE is proposed.

在探索求解精度和计算效率的矛盾中，提出了结合求解常微分方程的节点制表、节点间插值的快速计算Gre en函数的方法并据此开发了一套三维深水时域Green函数的数值计算程序。

By use of the series representation of the Bessel function of the first kind and zero order, the approximate expression of the wave structure function under all conditions of atmospheric turbulence is derived.

由第一类零阶贝塞尔函数的级数展开推导出波结构函数在任意湍流条件下的近似表达式。

For example, karst topography is very approach this mode. We not only discuss the effect relation of dipole field in the mediator, but also in the property of antenna. Imaginaries Bessel function is involved in the process of discussion. because it is very important to the result.

钻孔雷达一般使用偶极天线，所以对偶极天线辐射场正反演问题的研究是目前的当务之急，它直接影响着对钻孔雷达资料的正确解释，对进一步研究钻孔雷达天线的有关特性及钻孔雷达的研制起着非常关键的作用。

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.

通常人们把水平叠加结果看成平面波，这对于通常所用的旅行时信息是正确的，而对于与振幅密切相关的波阻抗反演就不能满足要求了。

This method was based on rotation formula of the current magnetic field and the magnetic fields can be expressed by a double integration about spatial radial coordinate and spatial wave number of Bessel function.

由电流磁场的旋度公式出发，推导了多层介质中点电流源磁场的表达式，其为一个关于空间径向坐标和贝塞尔函数空间波数的二重积分。

In chapter 5, the design of oscillator is discussed. First introduced the condition of how to make circuit oscillate and keep stabilization. And compared the advantage and shortcoming of design oscillator with S parameter or Bessel Function method.

第五章主要是讨论了射频前端关键模块本振源振荡器的设计，分析了反馈振荡器的起振、平衡条件，比较了用晶体管S参数和时域贝塞尔函数法设计振荡器的优缺点，最后以科尔皮兹型振荡器为例用ADS软件进行设计仿真，给出了设计结果。

Theoretical analysis demonstrates that the phase change caused by the shift of illuminated light is ignored in discussion before.In this study,this method is corrected by overlapping a phase factor and a new method is put forward to eliminate the effects of this factor by utilizing the phase characteristics of squared Bessel function.

理论分析发现，以往的讨论忽略了照明光之间位移引起的相位变化，研究通过叠加一个相位因子对此进行了修正，并利用贝塞尔函数平方的相位特点提出了消除该相位因子的办法。

A convenient procedure for drawing Bezier curves, after the selected point will be able to draw the corresponding Bessel function, while the location of the point can be adjusted to adjust the curve.

详细说明：一个方便绘出贝塞尔曲线的程序，选好点之后就能画出相应的贝塞尔函数，同时可以调整点的位置来调整曲线。

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％。