查询词典 modified bessel function

Referring to Bessel function,a calculation equation of temperature distribution in the surface and heat-flow density of wax deposit layer in the laminar flow is deduced,as well as temperature distribution inside.

通过对试验环道上测试段相关数据的测试，对比分析测试段管壁有沉积物和无沉积物时测试段管壁内温度分布的不同表达式，根据能量方程建立了无量纲温度分布方程，利用贝赛尔函数推导出原油在层流状态下沉积层表面温度分布、沉积层热流密度、油流温度分布等相关温度场的计算公式，为研究蜡沉积规律，定性分析管路结蜡层厚度和制定合理的清管方案奠定了理论基础。

The calculating concrete example showed that the difference of results between perturbation method and Bessel function method are relatively.

实例计算证明，摄动法计算的结果与Bessel函数法计算的结果相差较小。

This dissertation has also developed an algorithm for computing Bessel function of high order, which improves the efficiency of the FMM greatly.

同时论文还提出了高阶Bessel函数一个快速算法，这个算法的提出大大提高了FMM的计算效率。论文分析了MEI方法和其它吸收边界条件的思想。

This model was solved by using the methods of separating-variables and Bessel function, and obtained the analytic solution of pressure distribution for one dimension and unsteady state.

并进而提出负压区的存在不仅与反吹的结构有关，而且和多孔介质本身的性质有关。

A straight line may be drawn approximately through the innermost maxima of each Bessel function and the origin.

一条直线可以得出大约通过内心极大每个Bessel函数和原产地。

For example, in the design of antenna, it is always involve the imaginaries Bessel function, so these work are belonged to the base research work, but it is important.

本文对各向异性介质偶极天线辐射场的数值计算的研究以及各向异性介质波参数的数值计算的研究目前还没有文献系统介绍，但这些内容对进一步研究探地雷达辐射场的规律是必不可少的，尤其是传播常数，它在探地雷达的研究中仍然是一个非常重要的公式，对其的深入研究有利于对探地雷达资料的正确解释。

This reactor has asymmetrical heat resource distribution. The Bessel function distribution is at radial direction.

此种堆型具有不均匀内热源的分布（径向为贝塞尔函数分布，轴向为余弦函数分布）。

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 chapter 1, firstly, by using classical analysis methods, such as the introduction of Bessel function and semigroup theory, we transform the pseudo-parabolic equation into an abstract operator equation and achieve the existence and uniqueness of the local solution.

在第一章中，利用经典的分析方法，引入Bessel势函数，将伪抛物型方程转化为抽象算子方程，首先，利用算子半群理论，论证了局部解的存在唯一性。

Molecular Distillation is a kind of high vacuum distillation method, which is suitable for the separation of high boiling, heat sensitivity and viscidity products.

分子蒸馏技术是一种在高真空条件下进行的连续蒸馏过程，适合于分离高沸点、热敏性及具有生物活性的混合物。

They are to the Noughties what yuppies were to the Eighties .

那在六十年代是时髦的，但在八十年代肯定是过时了