查询词典 parameter estimation

The paper consists of three parts. First, we give the calculation for every order central moment for the Logistic population, mean vector and covariance matrix of the order statistic of random sample from the Logistic population, and means of several special functions for the order statistic of random sample from the Logistic population. Secondly, we discuss the parameter estimation for the Logistic population. Finally, we solve the question about the goodness-of -fit test for the Logistic population.

研究的主要内容分三部分：第一部分是关于Logistic总体各阶中心矩、样本次序统计量期望向量与协方差阵及若干个特殊的样本次序统计量函数期望的计算问题；第二部分是关于Logistic总体分布参数的估计问题；第三部分是关于Logistic总体的拟合优度检验问题。

An algorithm for weak chirp signal detection and parameter estimation is presented in this paper.

提出一种超低信噪比下 chirp 信号的检测与参数估计方法。

The approach of reliable extraction of conical surface feature and parameter estimation from range images we proposed has solved a difficult issue.

本文提出的圆锥面提取和参数估计方法较好地解决了从深度图象中可靠提取圆锥面的难题。

When using restricted maximum likelihood for parameter estimation, we need to get the minimum of a function. But if the expression of the function is complicated, it is difficult to obtain the derivatives of the function. We introduced conjugate direction method which avoided the derivatives.

在用限制极大似然法估计参数时，需解决函数的极小化问题，而当函数的表达式较为复杂时，将难以获得其偏导数，本文给出的共轭方向法，避开了求导问题。

For the purpose of evaluating the efficacy of description dosage in a clinical trial in which compliance is observed, a new parameter estimation method is proposed for a structure linear model based on the combination of least square and pseudo-likelihood , and under general regular conditions, the consistency and asymptotic normality of the estimators are verified.

为了研究依从性对药物效果的影响，对一种结构线性模型，结合最小二乘和拟似然的思想，提出了一种新的参数估计方法，并在一般的条件下，证明了参数估计的相合性和渐近正态性。

Some improved parameter estimation algorithms are presented , their convergent properties are proved by using the martingale convergence theorem .

围绕这两个方面给出了一些改进的参数估计算法，并用鞅的各种收敛理论对之进行了严格的数学证明。

Combining the probabilistic jumping search of simulated annealing with the geometry search in convex polyhedron of simplex method, this paper proposes a class of effective search strategies for parameter estimation of nonlinear systems.

摘要结合模拟退火的随机概率突跳性搜索和单纯形法的凸多面体几何搜索，提出了非线性系统参数估计的一类有效搜索策略。

The theoretic formulas for cross correlation analysis were derived. 2. According to the frozen model, a transit model and expression formula of flow noise were got. Parameter estimation algorithm was applied in calculating of cross correlation function.

根据凝固模型，建立了流动噪声信号的传递模型，推导出凝固模型时的传递函数的表达式；对两种流动模型情况下，流动噪声的传递进行理论和仿真研究，仿真表明，尽管参数估计法可以消除传感器的涂污现象，但计算量大，速度慢，不能满足实时测量的要求。

A new application to parameter estimation in cubic spline function fitting via genetic algorithms is presented.

介绍了遗传算法的一种新应用——三次样条函数拟合中的参数估计问题。

Based on higher-order cumulant of the received data of array, we discuss theproblem of joint parameter estimation of near-field signal sources.

研究了基于阵列接收数据的高阶累积量的近场信号源参数联合估计问题。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。