查询词典 systematic sampling

What is the sampling distribution of a regression coefficient?

分别回答什么是回归系数，什么是回归系数的样本分布？

A high performance digital IF radar receiver which uses IF echo and COHO joint process algorithm, field sampling, field processing and remote transmission is introduced. Its performance can meet the requirements of modern high performance radar system.

采用中频回波和中频相参信号联合相干处理，现场采样，现场处理，远程传输的体系结构实现了高性能数字中频雷达接收机，其性能可以满足现代高性能雷达系统的需要。

The chromosome preparation procedures with wheat coleoptile cells as sampling objects were preliminarily established.

初步建立起以小麦胚芽鞘为取样对象的体细胞染色体制片方法。

In this sampling, Beijing Lao Cai Chen Food Co., Ltd. of sesame have been detected coliform bacteria exceeded.

在本次抽查中，北京市老才臣食品有限公司的芝麻酱被检测出大肠菌群超标。

This thesis has mainly contributed two results in theory: one is that the covariance matrix is not positive definitive if the number of sampling is least than the number of variables, the other is that the covariance matrix of discrete sample is positive definitive if and only if the sum of every random column vector of data matrix is non I-linear combination.

本论文在理论上，主要得出两个新的结果：ⅰ抽样调查中，若样本的个数少于变量的个数则样本协方差矩阵恒为非正定；ⅱ离散型样本协方差矩阵正定的充要条件是样本资料阵的各随机列向量是非I-线性组合。

Probably he had come down in the world and this sampling was all that was ...

也许他已经落魄，这是所有的采样是。。。

Probably he had come down in the world and this sampling was all that was left him ,from this time when he could afford to come and select his favoritepudding.

也许他来了，在世界上这是采样都留下他，从这个时候，他可以负担得起来，并选择他的favoritepudding 。

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。

It is demonstrated by the system emulation that the system can complete the functions of the high-speed sampling of analog signals, storage and data upload.

经过系统仿真，验证了该系统可以完成对模拟信号的高速采样、存储及数据上传功能。

MethodsA cluster sampling of 1 474 middle-aged intellectuals was measured by the SCL-90 table and was analyzed by the Reliability Analysis, Principal Component Analysis and Analysis of Variance.

方法采用整群抽样方法，应用症状自评量表SCL-90对1474名中年知识分子进行心理状况测评，运用尺度分析、主成分因子分析和方差分析。

Objective:To compare the response control and attention of Schizophrenic patients with that of the healthy controls by Integrated Visual and Auditorycontinuous performance test. To quantitate the impairment of cognitive function in patients, and to explore the relationship between cognitive function and the severity of the disorder.

目的：探讨精神分裂症病人在IVA持续操作测试中的反应控制能力、注意力等，并与健康人进行比较，从而量化精神分裂症病人的认知功能损害，并进一步探讨其认知功能与疾病严重程度的关系。

Main effective factors including subcooling degree, mechanical vibration, gas hydrate reformation, environment temperature, noncondensing gas and surfactant are analyzed.

指出过冷度、机械振动、重复生成水合物、环境温度、不凝性气体、添加剂是影响气体水合物生成的主要因素，还对R152a水合物的放冷进行了实验研究。