查询词典 degree of approximation

This paper presents an improved variable stepsize BP learning algorithm by making use of the concept of model approximation degree and by taking advantages of the merits of simulated annealing method.

基于模型逼近度和接受概率的一个变步长快速BP学习算法叶东毅（福州大学计算机科学系福州350002）摘要本文给出模型逼近度的概念。

The magnetic analyzer was C-shape, with the bending radius of 300 mm and the bending angle of 60 degree after hard-edge approximation, and the good-field-region was 6.54 cm.

设计得到的磁分析器为C型磁铁，偏转半径300 mm，硬边近似后偏转角度60°，磁极间隙30 mm，好场区宽度65.4 mm。

Firstly, the function sinx that appears in the simple pendulum equation is replaced with a polynomial of degree 3 using Maclaurin series expansion and Chebyshev polynomial approximation. Subsequently, the resulting equation which is a Duffing type equation is approximately solved with combing Newton's method and the harmonic balance method.

首先，利用Maclaurin展开和Chebyshev多项式加速技术将单摆振动方程中的正弦型恢复力用三次多项式近似代替，得到一个Duffing型方程；然后，将牛顿法与谐波平衡法结合起来建立Duffing方程的解析逼近周期及周期解，从而给出单摆振动的解析逼近解。

Moreover, an offset approximation with high precision is obtained by degree elevation of the direction curve of normal.

因此关于等距曲线、曲面的研究，已成为 CAGD中的一个热门课题。

For the Bezier tensor product surface, recursive degree elevation and subdivision both generate a sequence of control meshes that converge to the underlying Bezier surface, and get the piecewise bilinear approximation of the original surface.

将升阶和子划分算法分别应用于Bézier张量积曲面，会产生一系列的控制网格，得到原曲面的分片双线性逼近。

The optimal or nearly optimal uniform approximation can be obtained for degree reduction of NURBS surfaces by using the method.

实现了NURBS曲面降阶的最佳或近似最佳一致逼近。

The paper bases on competency including personality, attitude, knowledge and skill of competency and so on. It adopts qualitative index and quantitative index and assesses the attitude, achievement, ability and potential across-the-aboard. The paper draws on fuzzy synthesis decision, analytic hierarchy process, fuzzy approximation and factors weight design and so on in fuzzy mathematic by dint of the research about management by objective, 360 degree feedback, key process indication and balance score card. We establish performance assessment index based on competency model and distribute different weigh. We can set the weight of different assessment index. At the same time, we must set assessment relation and corresponding weight considering different people. We also assign different weight to every assessment factors according to the require of corporation. Then we can go on assessing more particularly and compressively.

本论文基于能力素质模型，包括能力的人格、态度、知识和技能等要素，采用定性指标和定量指标，对员工的工作态度、业绩、能力和潜力进行全面考核，通过对目标管理、360度反馈评价法、关键绩效指标和平衡记分卡等考核方法的研究，独创引入模糊数学中的综合评定法、层次分析法、模糊贴近度以及要素权重设计等方法，以能力素质特征模型为基础确立绩效考核指标，利用主观经验法、层次分析法等确定各考核指标的权重，同时考虑到企业中不同人员的考核，还需要定出考核关系及其权重，同时还可以根据企业要求为各考核要素分配权重，这样更详细、更全面的进行考核，并借助软件工程，利用UML建模语言把整个软件系统化、模型化，采用。

In this paper,using the method of,we discuss septic Lacunary interpolation spljne,which is a generalization of,we derive some results on asymptotic representation,approximation degree and saturation

1—[3]讨论了五次缺插值问题，而[4]对它提出了一种分析方法，用这种方法来进一步讨论高次的缺插值问题是成功的，本文就是用这种方法讨论七次的问题，可以得到它的一些渐近式、逼近阶及饱和度的若干结果我们所讨论的七次样条 S_n它满足下列条件

In this paper, the following progress has been discussed:(1) the improved conjugate gradient algorithm which combines the inversion equation;(2) the formulation for velvet gene at all directions and the approximation method of Jacobian matrics based on disturbance method;(3) the model is adjusted by analyzing the influence of damp coefficient and correction factor to inversion result ;(4) the influence of damp coefficient to the resolution of inversion is studied. to some degree, we improved the problem of "barycenter ascending shift" to electric anomalous body in 3-D resistivity inversion.

本文主要讨论了以下几个方面的内容：（1）结合反演方程式改进的共轭梯度算法；（2）基于扰动法的线源Jacobi矩阵的近似计算方法及光滑系数矩阵在各个方向上的光滑因子的计算公式；（3）通过分析阻尼系数与修改量校正量对反演结果的影响，提出了利用校正系数对模型修正量进行校正；（4）较为系统的讨论了阻尼系数λ对反演分辨能力的影响，较好的改善了三维电阻率反演中的电性异常体重心的&上漂&现象。

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。