加权

Second, largely because of the peg of the yuan to the dollar, there altrade-weighted value of the Chinese currency has declined since the beginning of 2002 when the value of the U.S. dollar reached apeak.

第二点，主要是由于人民币钉住美元，自美元价值达到最高点的2002年初开始，中国货币的实际贸易加权价值开始下跌。

Firstly, the isotropic difference templates were introduced to approximate the differential in the ADI-FDTD method, and the weighting coefficients of difference terms were determined for implementing isotropic numerical dispersion; Then the permittivity and permeability were adjusted manually to reduce the numerical dispersion error in any directions. Therefore the simulation accuracy and efficiency can be improved effectively for time domain problems with some finite bandwidths.

该方法在ADI-FDTD方法的差分近似微分中引入各向同性差分模板，并通过确定各向同性差分的加权系数来近似实现各向同性，然后人为修正空间的介质参数来减少各个方向上的数值色散误差，因此在模拟一定带宽的时域问题时可有效提高计算精度和计算效率。

ABSTRACT : This paper studies the tariff of arithmetic mean and weighted mean of China tariff rate, surveys and measures the rationality about tariff policy.

通过对我国关税率的算术平均值和加权平均值的比较，对关税政策的合理性进行了测度与衡量。

AIM: To evaluate the value of diffusion-weighted imaging in ascites diagnosis.

目的： 探讨磁共振扩散加权成像成像在腹水病因诊断中的价值。

In this dissertation, we study the mean value problems of some special number theory functions, relation with some important functions and a series of asymptotic formulas about some hybrid functions.

本文研究了一些特殊数论函数的均值估计问题，以及它们与一些重要函数之间的联系，有关和式的一系列加权均值。

Compared with average weighted and time-window algorithm, this paper introduce an attenuation factor to implement the user interest profile updating algorithm.

3对比平均加权算法、时间窗算法，引入遗忘因子，提出一种符合人的遗忘规律的增量式的用户兴趣模型更新算法。

With this method, the controller of the PWM DC/DC converter is designed. Utilizing augmented matrix to build a tracking control model with no steady error, and through select weighted matrix to perform the no overshoot and dynamic response of system.

通过引入增广矩阵，增加了控制量U*中对误差的积分环节，推导了无静差跟踪控制系统模型；在目标函数的构成参量和形式确定之后，通过选取适当的加权矩阵，实现系统的无超调动态响应。

Based on the characteristic of multi-resolution analysis of wavelet transform, pitch detection algorithm with the combination of wavelet transform and weighted autocorrelation function is proposed here.

3基于小波变换的多分辨率分析特性，提出了小波变换与加权自相关函数相结合的基音检测算法。

This paper presents a new smart antenna algorithm. Based on the characteristic that in CDMA system desired signal is much larger than other signals after despreading, the algorithm uses eigenvectors of each autocovariance matrix of the first element and one of the other elements to form the weight vector.

本文根据CDMA系统的特点提出了一种新的智能天线算法，该算法利用CDMA系统解扩后有用信号远大于其他用户信号的特点，通过求得每根天线与第一根天线的信号相关矩阵的特征向量来确定智能天线的加权系数。

The value of object state obtained from last time is iterated once by Levenberg-Marquardt algorithm, and the iterative value is used as an auxiliary variable to estimate the motion parameters by the weighted least-square method.

该算法将上一时刻的目标估计值进行一次Levenberg-Marquardt迭代而得到的估计值作为辅助变量，进而对目标参数进行加权的最小二乘估计。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐