查询词典 covariance function

This method decomposes wave-front phase to a linear combination of orthonormal basis functions, According to the covariance of weight coefficient, a random wave-front phase is realized.

协方差冲激函数产生法对连续波前相位进行冲激函数正交分解，根据正交分解系数的协方差模拟平行光通过大气后的瞬时波前相位。

This needs a set of human resource management information system to help the department managers to handle the daily works, such as Input output works and statement covariance...etc.

同时人力资源部也需要在现有人力资源数据基础上进行数据清理和转换，从而挖掘出对管理者决策更有价值而且综合性更强的信息。

Chapter 3: we construct a general model of covariance-adjusted duration-convexity immunization to hedge the interest rate risk in the situation that the yield curve doesnt parallel shift and then analyse the model in the case of hedging portfolios of two assets and three assets.

第三章建立一个基于协方差调整的一般久期-凸度免疫模型，用于收益率曲线非平行变动情形下对冲利率风险，并用两资产对冲组合和三资产对冲组合进行特例分析。

In this dissertation, we develop the research work of the following three aspects based on existed work.First, using the scale-invariant property of multiscale model, i.e. Markovian among scales, a method of qth-order tree-based for multiscale representation of a class of 1-D stochastic process is presented. The multiscale stochastic model is established. The representation forms of parameter matrices, such as, the state transition matrix, the disturbance matrix, the initial state and the corresponding covariance matrix are deduced in detail. The multiscale sample paths based on distinctive order tree are presented by computer simulation.

本文在已有工作的基础上，开展了以下几个方面的研究工作： 1、根据多尺度模型尺度不变性，即利用尺度间的Markov性，给出了一类1-D随机过程基于一般q阶树的多尺度表示方法，建立了相应的多尺度动态模型，详细推导了多尺度模型中的状态转移阵、扰动阵、初始状态和相应的协方差阵，并通过计算机仿真给出了不同阶树的多尺度采样路径。

We aimed to assess whether metabolic brain imaging combined with spatial covariance analysis could accurately discriminate patients with parkinsonism who had different underlying disorders.

本研究的目的是评估代谢脑显像与空间协方差分析相结合是否能准确的识别有不同潜在病变的帕金森综合征患者。

Point estimation is the estimation of the mean, variance, and covariance of a random variable from sample data.

点估计是样本数据随机变化的方式，差异，协方差的估计。

In first part it pays attention to theory study. Afterwards, based on linear programming, we introduce some properties of conic optimization and its dual problem, which are a kind of especial convex programming. In second part, we apply these theories to practice, such as least-squares problems, polynomial solution and approximating covariance matrices, and other aspects .

第一部分是理论研究：在线性规划的基础上重点介绍了一种特殊的凸规划类型——锥规划及其对偶锥规划，并介绍了锥规划及其对偶锥规划的发展及其性质。

Based on the rules and the facts that covariance matrix is positive definite symmetric matrix, new split-and-merge methods are proposed and the improvements for the SMEM algorithm are designed.

最后在Ueda等人的利用分离合并过程来改善EM算法的思想启发下，具体从用于高斯混合体模型的EM算法出发，得到了一类新的分离合并EM算法，同Ueda等的比较，后者的分离合并方法是一种启发性的过程，前者则是在一定理论指导下的推出的。

The solutions at the equilibrium points of the proposed framework turn out to be globally stable and correspond to several principal or minor eigenvectors of a covariance matrix.

我们提出一个能实现PCA和MCA的统一框架，证明了其全局稳定的最大点，权矢量是输入过程的前p个主分量，而其全局稳定的最小点，权矢量则是输入过程的m个次分量。

In this paper, the authors aim to use quadratic optimization theory in obtaining generalized optimal weights, whereby, the restriction on the covariance matrix is just a mere special case.

本文作者的目标是应用二次优化理论以获得一般情况下的最优权系数，所得结果突破了前述的方差阵的限制。

He became prime minister in 1997 and won international acclaim for his role in the Northern Ireland peace process.

他在1997年成为总理，并且因为在北爱尔兰的和平进程中发挥的作用受到国际社会的赞许。

Mixed Page Sorting Method Using the cuttable user model, this thesis proposes a mixed page sorting method by using cutted user model in server-side and complete user model in client-side.

隐私分级利用的混合式页面排序方法针对个性化搜索中搜索结果排序的问题，本文利用隐私可控开放的用户偏好模型，提出一个在客户端和服务器端分步进行的隐私分级利用的混合式页面排序方法。