查询词典 estimation

Aiming at the signal processing problems that exist in online fault diagnosis for train running gear, based on discussing the principle of characteristic spectrum analysis, a method of full period and uniform angle sampling is applied, which transfers the vibration signal from time domain into angular domain. The angular domain signal is transferred into corresponding characteristic spectrum using FFT. Through spectrum estimation and analysis, fault characteristic spectrum values of running gear components are acquired to distinguish their faults.

在讨论特征分析方法原理的基础上，针对机车走行部故障在线监测过程中存在的信号分析与处理问题，运用整周期等角度采样方法将时域振动信号转换为角域信号，采用FFT变换将角域信号变换为对应的特征频谱，通过谱估计、谱图分析得到机车走行部各零部件的故障特征谱值，再根据该特征谱值识别机车走行部各零部件的故障。

Investigates the problems of joint 2-D angular and frequency estimation based on uniform circular array.

研究均匀圆形阵列的联合二维角度-频率估计问题。

In this paper, a new DOA and angular spread estimation algorithm for incoherently distributed source is proposed.

摘要该文提出了一种新的非相干分布源的DOA和角度扩展估计算法。

By virtue of behavior experience in human society and the characteristics of pervasive computing,in addition,according to dynamic transformation discipline between the lag of trust and the anteriority of service,a trust-based model cascade servers is put forward while trust relatiuon establishment,trust degree estimation and update are depicted.The best server satisfied with the user's request is selected out by means of cascade servers to improve the service of quality and efficiency such as multiple evaluation to trust degree dynamically by direct and indirect methods（the third party's recommendation）,which conquers the disadvantage that a singular equipment can't satisfy the request property and blindfold choice of service.

借鉴人类社会行为关系的规律和普适计算环境的特点，依据信任的滞后性和服务的前瞻性矛盾的动态演化规律，提出普适计算环境中信任关系的建立、信任度的衡量和更新以及基于信任的级联服务模型；通过直接和间接的方法动态地对信任程度进行多角度评估，以级联服务的方式从众多可选择的服务目标中筛选出最符合用户要求的服务，克服了单一设备不能完全满足服务请求属性和服务选择盲目性的缺点，提高服务的质量和效率。

This dissertation deals mainly with the target state estimation theory and application technologies in close-in air-defense and antimissile system.

本文研究了近程防空反导系统中的有关目标状态估计理论与技术，通过分析近程防空反导的国防意义及其所对抗的目标特点和难度，说明了分布式武器系统是对抗近程低空目标的有效措施。

First discarding the thought of fitting by AR model, the ARMA model is fitted by a high order MA model using Gevers-Wouters algorithm on the basis of related functions of ARMA model. Then according to the parameters of the fitted MA model, the ARMA model parameter estimation through solving a system of antipathic linear equations using the least squares method is obtained.

首先摈弃传统的拟合到AR模型的思考方法，而是基于ARMA模型的相关函数用Gevers-Wouters算法对ARMA模型拟合到高阶滑动平均模型；然后在拟合的MA模型参数基础上，用最小二乘算法求解一个不相容的线性方程组，从而估计出ARMA模型参数。

A simple approximate estimation experiential formula of the mixture of the flammable liquids is then put forward.

对多元混合可燃液体闪点的变化规律进行了研究，提出了一个简便的闪点估算经验式。

Simple approximate estimation experiential formula of the mixture of the flammable liquids is then put forward.

bstract 对多元混合可燃液体闪点的变化规律进行了研究，提出了一个简便的闪点估算经验式。

Since both of them are approximate solutions, attention to the estimation of error has to be paid.

由于这两种解法得到的都是近似解，因此近似解的误差不能不让人关注。

After give the example in Angrist and Krueger(1991), I analyze each estimation and approximation method .

然后仔细论述了1991年Angrist和Krueger研究教育程度影响收入水平的例子，对各种估计方法及近似方法进行了比较分析。

"Yes, now you can give yourself airs," she said, you have got what you wanted.

"对了，您现在高兴了，"她说道，这是您所期待的。

Then the LORD said to me: Rebel Israel is inwardly more just than traitorous Judah.

上主于是对我说：＂失节的以色列比失信的犹大，更显得正义。