查询词典 first approximation

This article makes use of the approximation property of Laguerre orthogonal function series to present a Laguerre function approxima te model of linear dynamic systems.The model eliminates the need for assumption of the plant order and the time delay and approaches unknown systems via estimat ing the Laguerre coefficients on-line.

蒋中摘要：利用Laguerre正交函数序列对空间函数的良好逼近特性，建立了线性动态系统的Laguerre函数近似模型，该模型不需要对象的阶次和时延等结构知识，通过在线辨识对象的 Laguerre系数矩阵，能较好地逼近结构未知系统。

In the fifth part, we obtained a solution of the boundary function for the Laplace equation by knowing some of its interior points values of five-point difference approximation.

给出从Laplace方程的解的内点值求边界函数的方法。

According to the result, the confidence region of unknown parameters in single-index models is constructed. Finally, we consider the test of correlation and heterogeneity for hierarchical nonlinear mixed-effects models. According to Laplace approximation expansion of integrated log-quasilikelihood, a class of score test statistics is proposed. Under some very mild conditions, we prove the asymptotic distribution of the test statistics is a standard X~2-distribution. Through a Monte Carlo simulation study, the finite sample performance is examined.

最后，我们研究的第四个问题是分层非线性随机混合效应模型的相关性与异方差性检验问题，依据对数拟积分似然的Laplace近似展开提出了检验统计量，在一些正则条件下，得到了检验统计量的渐近分布是一个标准的χ~2-(来源：d7d7A65BC论文网www.abclunwen.com)分布，通过Monte Carlo模拟研究了其小样本的表现，实例验证了其实际应用。

Lastly, we discuss the energy-band structure of ultracold atoms in optical lattice by means of Green function method and in addition, procure the superfluid-Mott phase transition condition in mean-field approximation which is in agreement with the result in the literature.

最后利用格林函数方法讨论了光格子中超冷原子的能带结构，根据Mott相存在能隙的判据我们在平均场近似下重新得到superfluid-Mott相变条件，该结论与相关文献一致。

Then, in Section 2.2 we will give a survey on recent research activities in Diophantine approximation for formal Laurent series.

在这节里，我们探讨各种情况下的Diophantine逼近并给出相对应的结果。

And the least squares approximation is used. Outcome by different methods is analyzed, which leads to significant conclusions.

对由不同计算得到的结果进行精度分析，得出有 GPS＄＆R4tangatFMM意义的结论。

In this paper, after introducing the meshless method simply, we derive the moving least squares approximation in detail.

本文首先阐述了无网格方法的一般理论，然后详细推导了移动最小二乘近似的构造过程。

The method of least squares approximation for non-circular curve is suggested.

提出了一种利用最小二乘圆弧逼近非圆曲线的方法。

Commonly used algorithm c language, including some classic example, least squares, interpolation and approximation, etc.!

详细说明：常用算法的c语言实现，包括一些经典的比如，最小二乘，插值与逼近等等！

Based on feature points extraction and total least squares approximation, a new method is presented for extracting and vectorizing Street blocks on topographic maps.

提出了特征点提取和总体最小二乘拟合相结合的新方法，对扫描地图上的居民地街区进行提取和矢量化。

When this condition occurs, inbound replication with the source partner is stopped on the destination domain controller and event ID 2042 is logged in the Directory Services event log.

计算机密码学是研究计算机信息加密、解密及其变换的科学，是数学和计算机的交义学科，也是一门新兴的学科。

Instructions: click on the thumbnails to see a larger image, then use the left-right arrow keys to scroll through the slideshow.

使用说明：滑鼠点在小图上即可放大观赏。开启后键盘左右键可用来换照片。