参数估计

Because of the MA noise model part, the criterion function for ARMAX model identification is not always unimodal and an optimization based algorithm has a potential risk to be stuck at a local minimum.

在 ARMAX模型的辨识中，由于滑动平均噪音模型部分的存在，用以估计 ARMAX模型参数的误差函数不再是单峰的，因而常用的基于最优化的估计算法有被陷入局部最小点的危险。

A method to estimate the variation upper bound of end-to-end delay is proposed. The anycast requests with QoS constraint are supported by measuring, sharing and estimating network parameters between routers and anycast members in a small region.

同时，提出了一种由分段延迟变化估计总体延迟变化上界的方法，通过组成员和路由器之间的小范围网络参数的测量、分享和估计，支持带QoS约束的任播通信请求。

Using R/S analysis, we estimated Hurst Exponent to characterize the long term persistence. Also by analyzing the scaling behavior of zero probability, we estimated self-similar coefficient of Levy stable distribution.

我们使用R/S分析估计了长程相关的特征量赫斯特指数，并通过0概率的标度行为估计了列维稳定分布的自相似参数。

This paper proposed robust characteristic function for real-time flood forecasting system,and established the dynamitic monitor module for rainfall error,and researched dynamitic robust estimation for AR model parameters.

把抗差估计理论引入实时洪水预报系统，提出适合于实时洪水预报系统的抗差特征函数，建立降雨误差的动态监控模式，研究实时修正模型参数的动态抗差估计，结合洪水预报模型，形成具有水文学特点、抗差性强的实时洪水抗差预报系统。

It is found that there are no obvious corresponding signals related to the Slichter modes claimed by Smylie (1992), Smylie et al.(1993) and Courtier et al.(2000) in the product spectral density estimates. Instead, it is found that there exist 8 common significant spectral peaks in the subtidal band in the product spectral density estimates of the SCG gravity data, which may be related to some unknown global geodynamical or geophysical effects. It is very encouraging that the central periods of three peaks of them are estimated accurately as 4.93438 ±0.00186h, 4.42734 ±0.001159h and 4.09269 ±0.00082h, respectively, and in significant accordance with the eigenperiod of the Slichter modes of the solid inner core expected theoretically by Smith (1976) with only differences of 0.4%,-1.4% and 1.0%, respectively.

初步分析结果表明，在积谱密度估计中没有Smylie(1992)，Smylie等(1993)和Courtier等(2000)发现的与内核平动振荡有关的共振信号，但存在与某些未知的全球地球物理或地球动力学效应有关的8个重要的明显公共谱峰，估计了在这些谱峰附近的重力共振参数，其中三个谱峰的中心周期与Smith(1976)理论预测的固体内核Slichter模的本征周期符合得非常好，二者之间的差异分别仅为0.4％，-1.4％和1.0％。

In the present article , we describe an novel EM algorithm to estimate the haplotype frequencies and get some characters of the method .

以此数据为基础，应用改进的EM方法得到参数的估计并得到了估计的标准差。

The maximum-likelihood method is used to estimate the channel parameters after balanced homodyne detection. Then, Alice can change the intensity of optical pulses adaptively according to the estimated noise level, thereby a steady key rate can be obtained.

通过平衡零差检测后，采用最大似然估计法得到了信道参数，进而根据估计的噪声大小自适应调整Alice发送的光脉冲的强度，从而获得稳定的密钥生成率。

The maximum-likelihood method is used to estimate the channel parameters after balanced homodyne detection. Then, Alice can change the intensity of optical pulses adaptively according to the estimated noise level. Finally, a steady key rate can be obtained.

通过平衡零差检测后，采用最大似然估计法得到了信道参数，进而根据估计的噪声大小自适应调整Alice发送的光脉冲的强度，从而获得稳定的码率。

This paper discusses a discrete stochastic Lotka-Volterra competition systemwhere ε_1,κ are i.i.d N(O,1),ε_2,κ are i.i.d N(0,1), p is is revelant coefficient of ε_1,κ and ε_2,κ. Maximum Likelihood Estimation of parameters and asymptotic characteristic of the system are studied.

本论文主要讨论离散随机Lotka-Volterra竞争系统其中ε_1，κ是i.i.d N(0，1，ε_2，κ也是i.i.d N(0，1)，ρ是ε_1，κ与ε_2，κ的相关系数参数的极大似然估计及估计模拟和系统的渐近性。

Especially the latest fast estimation method, then expands it on this base, ratiocinates the recursive algorithm based on extreme order statistics, realizing the dynamic estimation of parameters.

特别是最新的快速估计方法，并在其基础上进行了扩展，推导出基于极端顺序统计量的递推算法，实现了参数的动态估计。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新