查询词典 approximation method

Based on the Lorentz-Mie theory, the single scattering characteristics of multi-dispersed spherical and multi-layered spherical particles are studied. The extinction coefficients, scattering coefficients, single albedos, single scattering phase functions and asymmetry factors of different clouds are presented. Numerical results for single scattering of spherical and non-spherical particles are obtained in the approximation of geometrical optics. The single scattering phase matrixes of non-spherical aerosols are calculated by using the T matrix method.

基于洛伦茨-米理论研究了服从一定尺寸分布的球形和多层球形粒子的单次散射特性，计算了各种不同类型云层的消光系数、散射系数、单次散射反照率、单次散射相函数以及不对称因子；利用几何光学方法计算了球形、非球形粒子的单次散射特性；利用T矩阵方法计算了非球形气溶胶的单次散射相矩阵。

Then 4 approaches are used for solving semiconductor thermoelectric problems are proponed:(1) solve basic semiconductor equations directly,(2) solve heat transfer equation with the fitting expressions of thermoelectric transport,(3) approximation of relaxation interval time,(4) characteristic temperature of thermoelectric-pile method.

随后，提出了求解半导体热电问题的4种方法：①直接求解半导体方程组②驰豫时间近似法③利用温差电输运系数的拟合式来求解导热方程④热电堆特征温度法。

The calculations are based on the transfer-matrix method and a truncating approximation.

采用了转移矩阵方法和截断近似技术。

In this paper, the practical data is analysed and get a good effect. It proves that it is vailed for VTI layers using the approximation moveout formula in this paper. This method has a good foreground.

本文还结合实际资料进行了分析，取得了较好的效果，说明了用本文建立时距曲线拟合公式进行横向各向同性介质多波速度分析是可行的，且具有广阔的发展前景。

A method to make Credal network approximation inference is proposed by computing the joint probability distribution and posterior probability of variables through the above operators.Furthermore its arithmetic is developed by SQL statement.Its validity and efficiency can be showed in the application case.

提出利用上述操作计算Credal网络中各结点联合概率分布和后验概率的方法，从而实现了Credal网络的近似推理，并给出了该近似推理的SQL语言实现算法，算例结果表明该方法是有效的。

This paper considers nonlinear least squares problems,connecting new quasi-newton equations which has a higher-order curvature approximation with factorized quasi-newton method which is symmetric.

本文考虑非线性最小二乘问题，将具有更高的二阶曲率逼近的新拟牛顿方程和具有对称性的针对非线性最小二乘问题的分解方法结合起来。

During the process of consecutive first-order reaction, the trend of the intermediate is largely determined by the ratio of the rate coefficient; therefore this case leads to an important method:steady-state approximation.

在连续反应中，速率系数的比值很大程度上决定了中间产物浓度的走向，并由此引出了一个重要的方法：稳态近似法。

In the thesis, I introduce a new method to calculate the amplitude for gluon radiation on the base of helicity amplitude approximation.

在本文的研究中，我们还介绍了螺旋振幅近似的计算方法，并在此基础上发展了一种计算胶子辐射振幅的新方法。

In traditional analysis method, the harmonic approximation is employed, and an effective capacitance of varactors during one period is calculated by the large-signal nonlinear analysis.

在传统的谐波平衡近似方法中，通过大信号非线性分析方法可以计算出一个周期内可变电容的有效电容值。

We present a linear method for motion estimation by correspondences of two regions in terms of moment tensors and weak perspective approximation.

在用线对应作运动估计的研究中，我们提出了两帧图象内多个平面约束的运动参数估计方法。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。