查询词典 systematic sampling

Using the total cylinder sampling system, the investigation on the morphology and micro-element of particulates from a electronically controlled diesel engine were conducted by a field emission gun transmission electron microscopy, and the results were analyzed by the image technique.

基于电控燃油喷射柴油机的全气缸取样系统，利用场发射透射电子显微镜和图像处理技术，对柴油机燃烧过程中形成微粒的形态特性和微量元素进行了分析。

A fast finite mixture density function based adaptive importance sampling method is proposed to analysis structure failure probability and reliability sensitivity.

提出一种高效的基于混合密度函数的自适应重要抽样法，分析结构的失效概率及偏导型可靠性灵敏度。

For the reliability analysis of implicit limit state function, finite element analysis is a time-consuming process, and it impedes the application of normal importance sampling approach.

对于含有隐式极限状态方程的问题，重要抽样方法将大部分的计算时间用于结构有限元分析，这使得重要抽样的计算效率被大大降低了。

In this paper a new application of genetic algorithm in FIR filter design with frequency sampling method is presented.

摘 要：本文介绍了遗传算法在FIR滤波器设计——频率抽样法中的应用。

As a first approximation, we can assume 6dB per bit during the sampling process.

作为最初的估计，我们假设在采样过程中是6dB／位，因此，在16位线性采样情况下，我们可以得到如下结果

Meanwhile,data sampling of curves were fitted by using Cardinal curve.

一般工程技术人员是通过专业手册查阅曲线获取数据的，致使设计人员的精力过多地浪费在设计过程中烦琐的细节问题上，导致设计效率低。

According to the GST, it is not in fact necessary to sample with one fixed sampling period (1/fs).

根据GST，实际上没有必要以一个固定的采样周期(1／fs)进行采样。

Map strip sampling has no length and width; it also doesn't require the fixed shape of sample. The method provided a convenient way to determine the region for survey and calculated the area of the strip sample, thus resolving problems with calculating the survey area in past work.

地图样带法没有长度和宽度概念，也没有规定样带的既定形状，提供了一种确定调查范围和计算样带面积的便捷方法，解决了过去调查中样带面积计算的难题。

Methodology: Random sampling in the designated sites in the vegetable producing bases was conducted to collect 120 samples; Gas chromatography and gastity joining flocculus were adopted to test residues of 13 kinds of agro-chemicals such as organic Phosphorus,organic Chlorine and Dalmatian Chrysanthemum Ester remaining on vegetables from the producing bases, free markets and wholesale markets of Hezhou ciaty.

采用随机与定点抽样的方法采集贺州市主要蔬菜生产基地及农贸、批发市场中蔬菜样本120份，采用气相色谱和气质联谱法测定其中13种有机磷、有机氯和拟除虫菊酯类农药残留。

The floristics of seed plants in coastal hilly areas of southern Hainan Island was studied on the basis of data of 6 600 m2 sampling plots and route survey.

在对海南岛南端沿海低山丘陵森林植被进行实地调查的基础上，研究了该地区种子植物区系。

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。