抽样比

A study cased in Zhejiang Province, China, showed the fact that the three-phase sampling could produce the highest AFI area estimation precision.

用浙江省实际数据计算的结果表明：三相抽样精度明显比其他估计方法高。

Recognition is done in canonical space. A three image frame sequence, 5:1 down sampling from the video, is converted to a posture sequence by template matching.

经由样板比对的方法将三张影像合为一个姿态变化序列，此影像序列乃从动作视讯5：1减低抽样获得。

Especially, the combined ratio estimator of domain total is investigated under stratified complemental sampling when auxiliary information can be used.

及该方案在分层抽样下的推广，在有辅助信息可用时构造域总量的分层联合比估计，并给出其方差和方差估计公式，同时我们给出了模拟结果，从模拟结果可以看出，给出的方差估计是估计量方差的近似无偏估计。

This paper formed a new method to get the wanted uniform design by computer sampling a number of experiment plan, counting their uniformities and choosing the best one of them as the last experiment plan.

这个试验设计方法，比使用均匀设计表来安排试验更简单直接，而且可以证明，其设计的试验点分布的均匀性，在抽样方案数足够多的情况下高于按均匀设计表来安排的试验。

According to the principle of proportional allocation,a three-stage sampling survey was set up.

应用按比例抽样原理，建立三级抽样框，抽样比为15％的问卷抽样调查。

Simple random sampling, two-phase sampling, auxiliary information, ratio estimator

| 简单随机抽样；二相抽样；辅助信息；比估计

Firstly,the sampling design has great impact on the accuracy of remote sensing classification.There exists great randomicity on the result of points and cluster sample verification on the different Sampling design.On the same sampling design,the stability of point sample verification is higher than that of Cluster sample verification.Secondly,the average accuracy of different sampling designs of multi-point and multi-cluster sample verification can reflect the accuracy characteristic.During the course of point sample verification,stratified sampling's error is lower than others'.During the course of cluster sample verification,systematic sampling and stratified sampling's accuracy are prior to simple random sampling's.

研究结果表明：（1）抽样方式对遥感分类精度评价结果的影响是客观存在的，不同抽样方式下的点样本和群样本检验结果都存在一定的随机性，但同一种抽样方式下，点样本检验精度评估结果的波动幅度小于群样本检验，稳定性比群样本检验要好；（2）不同抽样方式下的多次点样本和群样本检验的平均精度检验结果基本上都能够反映分类图像的精度特征，其中，点样本检验中，分层随机抽样点样本检验效果较好；群样本检验中，系统抽样群样本检验和分层随机抽样群样本检验的效果优于简单随机抽样群样本检验。

On the basis of the statistical characterestics of satellite meteorological infrared cloud charts this paper presents a coding algorithm of "Sub sampling+Modified JPEG+Image enlarging",realizing a compression ratio of 50∶1～100∶1, with the PSNR of 35～40dB and visually unperceptible distortion.

依据GMS卫星红外气象云图的统计特性，提出了一种&亚抽样＋修改的JPEG＋图象放大&的静止图象编码方法，使有失真压缩比在50∶1至100∶1时，恢复图象峰值信噪比在35dB～40dB之间，主观质量无视觉可觉察到的失真。

Even when the results under the two sampling systems were similar,typical mode sam- pling saved substantially cost and labor(by 2/5)and time(by 17/20)over random sampling.

即使两种抽样方法结果相近似，但典型众数抽样在布点、经费、人力及时间等方面比随机抽样为少，仅及随机抽样的3/5与3/20。

We found from experiments that the oversampling Gabor transform can represent image more effectively.

由实验发现，过抽样Gabor变换比临界抽样Gabor变换能更有效的表示图象。

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