查询词典 approximating

The new method is a combination of characteristic approximation to handle the convection part, to ensure the high stability of the method in approximating the sharp fronts and reduce the numerical diffusion, a smaller time truncation is gained at the same time, and a mixed finite elementspatial approximation to deal with the diffusion part, the sealer unknown and the adjoint vector function are approximated optimally and simultaneously.

此方法即为对方程的对流项沿流体流动的方向即特征方向进行离散，从而保证格式在流动锋线前沿逼近的高稳定性，消除了数值弥散现象，并得到了较小的时间截断误差；另一方面，对方程的扩散项采用混合元离散，可同时高精度逼近未知函数及其伴随向量函数，理论分析表明，此方法是稳定的，具有最优的L~2逼近精度。

The characteristic approximation is used to handle the convection part along the direc-tion of fluid namely characteristic direction to ensure the high stability of the method in approximating the sharp fronts and reduce the numerical diffusion; The mixed finite element spatial approximation is employed to deal with diffusion part and approximate the scalar unknown and the adjoint vector function optimally and simultaneously; In order to preserve the integral conservation of the method, we introduce the modified characteristic method.

该方法对方程的对流部分沿流体流动的方向即特征方向离散以保证格式在流动的锋线前沿逼近的高稳定性，消除数值弥散现象；对方程的扩散部分采用最低次混合有限元方法离散、同时以高精度逼近未知函数及未知函数的梯度；为保证方法的整体守恒性，在格式中引入修正项。

To cousider the least,we have to establish these facts under some comparablystrong but not the most proper conditions.From [12] and [13],if we suppose thatfis Lipschitz continuous in t,then all the above conditions(H1)-(H3) canbe established to a class of approximating problems of (1)(2).So the followingtheorem can be proved by theorem 5 through approximation process.

这时，我们只好"退而求其次"，在较强的"看来不是最适当的条件"下，来建立这些事实，从[12]和[13]中我们看到，只要加上"〓对t为Lipschitz连续"，则对（1）（2）的逼近问题族，上述条件（H1）-（H3）都可建立起来，从而，通过逼近过程，用定理5就可得到如下的定理。

This algorithm firstly translates arbitrary parameter curves into the piecewise cubic-degree Bezier curves, then using the properties of Bezier curve we can get the tangent vector and the normal vector of every point on the approximation curve, and calculate the approximating offset curve.

此算法先将任意形式的参数曲线转化成分段三次Bézier曲线，利用Bézier曲线的性质容易得到逼近曲线的切向量和法向量，从而计算出其等距逼近曲线。

As a result, we have demonstrated that the best approximating operator and the best approximating of bounded linear operator in H10 and H1a,+∞ are consistent and, at the same time, we have generalized the theorem of the best approximating of bounded linear operator to the more universal H1

然后，我们说明了在这样的索伯列夫空间上定义的样条插值算子和最佳逼近算子是一致的，同时把有界线性算子的最佳逼近定理也推广到了一般的索伯列夫空间H~1a，+∞上去。

In this paper we have discussed the best approximating operator and the best approximating of bounded linear operator in H01 and H1a,+∞.

本文主要讨论了索伯列夫空间H~1a，+∞与H_0~1

Tropical elements have 76 species, approximating to 39.58% of the whole liverwort flora, East Asiatic elements (including Himalaya-Japan, Sino-Himalaya and Sino-Japan) with 75 species, approximating to 39.06%. The proportion of Temperate elements are low, approximating to 10.94% of the whole liverwort flora.

大围山苔类植物区系的主要特点是种类丰富，可以划分为11种地理成分，其中热带成分比例最大(39.58％)，东亚成分略低于热带成分(39.06％)，温带成分较少(10.94％)。

In this paper we investigate the researching state, the developing situation and the prospect for the summability , the strong summability and their relevant approximating oder , strong approximating oder of Cesdro mean - an important linear summation process of the Fourier - Laplace series of functions on sphere.

本文研究了球面上的函数用其Fourier—Laplace级数的一种重要的线性求和法-Cesaro平均来求和与强求和及其相应的逼近与强逼近的阶的研究状况、发展态势和前景展望等。

The parameterization of section contour data is carried out by the method of accumulated chord length, the reasonable math model on the selection of node vector is given, the approximating of NURBS curve to section contour data is carried out by the least square method and the most reasonable number of control point is obtained by the dimidiate algorithm, which makes the approximating of NURBS curve reach the extent of complete automation.

用积累弦长的方法对截面轮廓数据进行参数化；给出了节点矢量选择的合理数学模型；用最小二乘法对截面轮廓数抛进行了NURBS曲线的拟合；二分法寻找最优控制点的算法使NURBS曲线的拟合达到全自动化的程度。

When we study statistical distribution of DCT residues, we found the decreasing speed is too great in the tail of approximating distribution than the real DCT residues distribution if Laplacian distribution is used to model the DCT residues, and this will cause some mismatches in the tail of approximating model.

在采用DCT残差系数作为FGS增强层编码器的信源时，DCT残差系数的统计特性决定着FGS增强层的码率失真特性，而DCT残差系数的统计特性则是由DCT系数的统计分布特性和相应的量化过程所决定的。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。