查询词典 systematic sampling

To avoid sampling bias, they restricted their analysis to one group of animals—the bivalve molluscs—that fossilise well.

为了防止取样的偏颇，他们将分析的对象限制在一类化石记录保存完备动物——双壳类软体动物。

Events,Operation and Relation of Sets, Classical Probability, Geometrical Probability , Statistical Stability of a Frequency, Axioms of Probability, Conditional Probability, Total Probability Theorem, Bayes' Rule,Independent Events,Independent Repeated Trials, One Dimensional Random Variables, Discrete Random Variables, Distribution Function of a Random Variables , Continuous Random Variables, Normal Distribution, Distribution of a Function of a Random Variable, Multidimensional Random Variables, Joint Distribution Function, Marginal Distribution Function,Discrete Two—Dimensional Random Variables,Continuous Two—Dimensional Random Variables, Independent Random Variables, Distribution of Functions of Random Variables,Expectation,Variance, Covariance, Coefficient of Correlation, Bivariate Normal Distribution, Law of Large Numbers, The Central Limit Theorems, Sample and Population ,Chi—Squared, T and F Distributions , Sampling Distributions , Point Estimation , Interval Estimation , Testing Hypotheses , A Test of Significance for Parameters in a Single Sample From a Normally Distributed Population , A Test of Significance for Parameters in Two Sample From Normally Distributed Populations .

本课程的主要内容：概率的概念与运算、随机变量及其分布、随机变量的数字特征与极限定理、数理统计的基本概念、估计和检验的基本方法，随机事件与概率随机事件、事件的关系与运算、几何概率、统计概率等，条件概率、全概率公式、贝叶斯公式、事件的独立性、二项概率公式，随机变量的概念、离散型随机变量、随机变量的分布函数、连续型随机变量、随机变量函数的分布，多维随机变量及其分布函数、边缘分布函数、随机变量的独立性、二维随机变量函数的分布，数学期望、方差、协方差和相关系数、大数定律、中心极限定理，总体与样本， X 2-分布、 t-分布和 F-分布，统计量及抽样分布，假设检验的基本概念、单个正态总体参数的显著性检验、两个正态总体参数的显著性检验。

The system has the following context: choosing image sampling card, 8253 counter design, speed sensor design, blowgun controlling card design, system module division and computer software flow chart.

其主要内容有：图象采集卡的选取，8253计数器的设计，速度传感器的设计，喷枪控制器的设计，系统模块的划分和计算机软件流程图。

This book gives a brief account of significance and historical development of quality control, emphasizes various types of control charts and acceptance sampling systems and procedures, and gives a brief and direct introduction of probability and statistics.

本书简要概述了质量控制的意义和历史发展过程，重点讲解了各种类型的控制图和抽样检验体系和过程，而对概率和统计知识的介绍非常直观和简单。

Technical parameters and characters of sampling system determine that seismic wave amplitude recorded by seismograph is approximate relative amplitude. Using these data necessarily leads to serious distortion of inverse parameters. So using Born approximation can only obtain the location of interface even if the earth medium is little disturbance.

采集系统特性和技术指标决定了所记录的地震波振幅值为近似的相对振幅，用这样的相对振幅作为地震波参数反演的振幅真值依据，必然导致反演参数值的严重失真。

Help SCMC region QAR to deal with the complaint from bottler. If needed, conduct on-site sampling, testing and analysis.

协同SCMC区域QAR处理装瓶厂投诉，如有需要，进行现场取样、检测和分析。

Methods: The method used direct sampling technique to determinate chloroform, bromodichloromethan, dibromochloromethane, bromoform, which was seperated by tube column, detected by electronic capture detector and determined by inner standard method.

水样直接进样，用毛细管柱色谱分离，电子捕获检测器检测，采用内标法定量，可同时测定水中三氯甲烷、一溴二氯甲烷、二溴一氯甲烷和溴仿。

PICC is of higher performance than PLC, it can more easily solve the problem of sampling bed thickness and the control of electro-magnetic valves and so on in jig automation, buoyage displacement sensor can be sublimated to a complex sensor by means of the dynamic analyze of buoyage displacement signal.

可编程智能卡在过程控制中具有比PLC优越的性能，在跳汰自动化的应用中可更方便地实现床层厚度的采样与电磁风阀控制等工作，通过对浮标位移信号的动态分析可将浮标位移传感器升华为一个可感知多个参数的复合传感器。

Factor of 5 at 200 Hz sampling rate, and by a factor of 10 at 100 Hz

采样率上的滤波效率分别为113，57 和47。

In addition, in the design of software configuration it analyzes the realization of the high-speed data sampling program and intelligent information processing and monitoring. At last it introduces function of sbftware of systems analysis in brief.The operation demonstrates that the brand-new monitoring method of the monitoring system can acquire the operation axis of large-scale rotary kiln by rule and line on the operation position, and it is a break-through in real-time monitoring method.

现场运行表明，该监测系统所采用的全新的监测方法能够在十分恶劣复杂的现场环境中准确地获取大型回转窑的运行轴线参数，对大型回转窑实时监测方法是一种新的突破；同时，采用的特制电涡流传感器及微机软件进行误差补偿极大地提高了监测系统的测量精度：采用的模糊自适应智能滤波方法有效地滤除了本系统恶劣环境下各种干扰因素。

When this condition occurs, inbound replication with the source partner is stopped on the destination domain controller and event ID 2042 is logged in the Directory Services event log.

计算机密码学是研究计算机信息加密、解密及其变换的科学，是数学和计算机的交义学科，也是一门新兴的学科。

Instructions: click on the thumbnails to see a larger image, then use the left-right arrow keys to scroll through the slideshow.

使用说明：滑鼠点在小图上即可放大观赏。开启后键盘左右键可用来换照片。