查询词典 squares

The simulation results also find that the Quasi-Aitken weighted least squares estimator has a smaller asymptotic variance than least squares estimator.

研究结果显示机率加权最小平方法与Quasi-Aitken机率加权最小平方法的回归参数估计式皆具有不偏性，其中Quasi-Aitken机率加权最小平方法的回归参数估计式的变异最小。

The simulation results show that probability weighted least squares estimator and Quasi-Aitken weighted least squares estimator are unbiased estimators of regression coefficients.

研究方法系采用Monte Carlo模拟方式模拟比较最小平方法、分层加权最小平方法、机率加权最小平方法及Quasi-Aitken机率加权最小平方法在分层不等机率抽样下的表现。

OD estimation was divided into fixed steps, with every step containing a bi-level programming. The upper-level problem was a generalized least squares estimator, while the lower level problem was a stochastic user equilibrium model. Namely, based on generalized least squares estimator and stochastic user equilibrium, a new estimator of the OD matrix was proposed by target matrix and traffic counts updating.

将OD估计分为固定的步数，每一步都是一个双层规划，上层为广义最小二乘估计，下层为随机用户均衡分配模型，即以广义最小二乘估计和随机用户均衡分配模型为基础，通过更新估计模型中目标矩阵和实测路段上的流量来估计OD矩阵。

Partial least squares regression is a new high-dimension-project-based nonparametric analysis method, which is an extension of ordinal least squares to deal with some defects of OLS much more efficiently.

偏最小二乘回归是一种基于高维投影思想的新的非参数回归方法，是对一般最小二乘的改进，比较有效地克服了OLS的部分缺点。

A new least-squares-based algorithm that introduces a within-class scatter with guaranteed classification performance in the design of least squares support vector machines is presented.This algorithm can obtain better correctness that reformulates primal LS-SVM problems with optimality criterion Min w′Mw where w is the weight vector corresponding the primal LS-SVM problems,M is the within-class scatter matrix.

提出了一个新的最小二乘支持向量机算法，该算法向最小二乘支持向量机优化模型中融入了类内散度思想，即用优化准则Min w′Mw对原LS-SVM进行重组合，w为对应LS-SVM中的权向量，M是类内散度矩阵。

The algorithm has following properties: Although the merit function has the form of least squares of a system of overdetermined equations, in the Newton equation of our algorithm, only the coefficient matrix of the system of overdetermined equations is used instead of its product as in Guass-Newton method for solving the least squares problems. That is, our Newton method is more like that for the system of nonlinear equations rather than that for LSPs. The global convergence is obtained for VLCP with vertical block P_0 + R_0 matrix; The local quadratic convergence rate is proved under the condition that the solution is BD-regular; Although there is only a Newton equation in our algorithm, the finite convergence property can be shown if matrix is vertical block P— matrix (without the hypotheses of strict complementarity).

该算法具有下列特点：所构造的价值函数虽然具有超定方程组的最小二乘问题的形式，但在基此建立的Newton算法中，其Newton方程的形式更象非线性方程组的Newton法中的Newton方程，仅利用了超定方程组的系数矩阵本身的信息，避免了一般最小二乘问题的Guass-Newton法中必须计算系数矩阵的乘积的工作量；对竖块P_0+R_0矩阵的垂直线性互补问题，算法具有全局收敛性；在解是BD-正则条件下，证明了算法的局部二次收敛性；虽然算法只含一个Newton方程，但对竖块P-矩阵垂直线性互补问题，算法具有有限步收敛性。

If the reader wants to work out the ratios, it is suggested he/she finds Punnet squares in an old genetics text and makes up one with 8 squares on a side.

如果读者要计算出各种颜色出现的几率，建议他/她在旧遗传学课本里找到Punnet square，然后在一边乘8次方，祝好运！

Based on the theory of least square method,combined with small residual sum of squares and large residual sum of squares,applied with the method of finite difference ,a new algorithm can be concluded .

从最小二乘法基本原理出发，结合大余量算法和小余量算法，运用有限差分的求导方法来求解Hessian矩阵，来推导试井分析中曲线自动拟合的新算法。

These two methods are Levenberg Marquardt Fletcher method and Quasi Newton method which are respectively based on small residual sum of squares and large residual sum of squares bet...

在拉普拉斯空间中进行试井分析是一个有效的方法，我们可以将实测数据经过拉普拉斯变换到拉普拉斯空间中去，然后再在拉普拉斯空间中进行试井分析，这在本文中作了详细论述并且给出了实例。

In recent years, building squares in cites above medium size has upsurged in our country, and in the meantime, some revenant problems have appeared. Nowadays, sustainable development is being emphasized increasingly, so the problems about the environment of city squares are not considered just according to their landscape effect, and their ecological effects are concerned more and more.

近年来，我国中等规模以上的城市兴起了修建城市广场的热潮，随之也暴露出了不少问题，而在日益强调环境可持续发展的今天，城市广场环境反映的问题已不拘泥于对广场景观效果好坏的评价上，考虑广场生态效果的呼声愈来愈高。

Objective:To explore the feasibility of laparoscopy in diagnosing and treating of abdominal diseases.

目的：探讨腹腔镜用以诊断腹部外科疾病及选择治疗方案的可行性。

The lifetime of nylon 1010 and nylon 1010/POSS composites decreased with increasing temperature.

热重-红外联用分析表明尼龙1010在氮气气氛下的降解产物主要为小分子的低聚物，POSS并不改变尼龙1010降解产物的组成。