查询词典 weighted sampling

It is concluded that the precision of these points is attenuated equidistantly as concentric circles. Its center is the weighted average of the coordinates of known points with the radius determined by the precision, the quantity and the distribution of known points. The precision of station points is almost independent of intersection angle, and the precision of known points is almost independent of station point. In some circumstance, the detail points may be more precise.

对测站精度、细部点精度分布规律进行了分析，结果表明：测站精度和细部点精度均呈同心圆向外衰减，圆中心在已知点的加权平均中心上，半径决定于已知点的精度、数量与分布；测站精度与测站的交会角几乎没有关系，细部点精度与测站的位置几乎无关，且可能高于测站精度。

A new color difference formula in RGB color space is achieved by dynamically adjusting the vector distance and angular between a pair of RGB colors.The dynamic coefficient is weighted by the importance of color component.

并根据颜色分量的重要程度用动态系数调整RGB颜色间的空间距离和矢量角度值，从而得到了一种全新的RGB颜色空间的色差度量公式。

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。

Results: All epidermoid cysts presented hyperintense signal.and the arachnoid cyst presented signal like CSF on diffusion-weighted imaging.

结果：所有表皮样囊肿在弥散加权成像上均表现为高信号，蛛网膜囊肿在弥散加权成像上成低信号。

This paper proposes a new method of drawing and designing weighted arborescence, with emphasis on the well distribution and minimizing intercrossing of branches. The principles of two different algorithms of determining local region are designed and discussed.

对赋权树形图的布局与绘制实现方法进行研究，着重讨论在绘图时如何在尽可能少出现交叉的情况下，使得树形舒展而分布均匀问题，提出赋权树形的一种新绘制方法。

The method of area ratio,the area of a circle in sample plot to the whole area of the circle, in which the distributing point is the center and the scale distance is the radius,is defined as the weighted coefficient of edge correction in this paper.

将边缘效应的权重值定义为以分布点为圆心，尺度距离为半径作圆，圆在样地内的面积部分与整个圆面积之比。

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 the thesis, disruption management of the case when the weighted shortest processing time rule is optimal and single machine with assignable due dates is presented.

我们所讨论的重新排序与单纯的将扰动发生后的问题当成一个新的排序问题来求解是不同的。

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。

Smoking cigarettes adds to the Computer Desk Computer manufacturer computer mouse Computer Computerized collar knitter machine Conduit Bodies construction board Container Bag Control Arm Cooking Thermometer general levels of air pollution as well as damaging our health.

吸烟不仅对健康有害，而且增加空气污染程度。香烟雾含有多种有害物质：不仅有致癌化学物质、有某种能阻止氧气进入血液的气体，还有引起血压增高、心速加快的被称为尼古丁的物质。

He is one of my favorite actors.

他是我最喜欢的男演员之一。