查询词典 moments

The explicit expressions of the first two moments and signal-to-noise ratio are obtained when we introduce the asymmetric dichotomous noises to the system.

当采用非对称的分段噪声时，可以得到系统响应的一、二阶矩和信噪比的精确表达式。

We introduce the general sigma point selection framework, and give two kinds of efficient methods: a reducing the computing complexity by decreasing the number of the sigma point; b scaling the sigma points to influence the effects of the higher order moments, then improve the accuracy of the UT; c Convergence analysis of the UKF, when used as an observer for nonlinear deterministic discrete-time system, is presented. Based on the UKF that captures the posterior mean and covariance accurately to the second or third order term (in terms of Taylor series expansion) for any form of nonlinearity, sufficient conditions to ensure local asymptotic convergence are established.

论文介绍了sigma点的一般选取规则，并给出了两种有效的方法：a通过减少sigma点集合的元素的数目来减少计算复杂度，b通过增加参数来逼近泰勒展开的高阶项，从而提高UT变换的精度；c论文研究了UKF算法应用于非线性确定性离散时间系统时的收敛性问题。

Describes general methods of point and interval parameter estimation and the small and large sample properties of estimators: method of moments, maximum likelihood, unbiased estimation, Rao-Blackwell and Lehmann-Scheffe theorems, information inequality, asymptotic relative efficiency of estimators.

点估计和区间估计的一般方法，估计量的小样本和大样本性质：矩法，极大似然估计，无偏估计，Rao-Blackwell 和 Lehmann-Scheffe 理论，信息不等式，渐进相对有效估计量。

It is only in moments of 'excitement' that the economic machine works at full blast.

只在'兴奋'的时刻，经济机器才能全速运行。

Over a cup of tea or after a meal -- at one's leisure; in leisure moments; at one's sparetime

明·汤显祖《牡丹亭·训女》："从今后茶余饭饱破工夫，玉镜台前插架书。"

Certainly there have been moments when that thinking has gone horribly awry — atonal music or molecular gastronomy.

当然，在人类历史上，这种思维方式也会走火入魔——例如无调性音乐或分子分解学。

That's when I discovered why my attacker was charging me only moments earlier.

这次我发现了为什么我的袭击者在一开始的时候攻击我。

It is the color of double happiness, representing joyous moments, auspiciousness, enthusiasm and prosperity.

红色是一种用来描述未来北京的最适合的颜色之一。

It is the the color of double happiness, representing joyous moments, auspiciousness, enthusiasm and prosperity .

红色是双喜临门的颜色，象征着快乐的时刻，吉祥，热情和繁荣。

A theoretical comparison is conducted to demonstrate that when autocorrelation coefficient and moving average coefficient are positive, the safety stock with a variable reorder level is less than that determined by means of moments of demand, but more than that with traditional reorder point approach.

理论分析得出，在需求呈正相关且随机误差项平滑系数为正数时，变化订货点水平确定模型得出的安全库存低于根据时点需求得出的安全库存，而高于传统模型得出的安全库存。

No, it's unnecessary. I don't think I have a fever.

不，没有必要，我想我没有发烧。

We live in a culture of instant gratification.

我们生活在即时满足的文化中。