查询词典 systematic sampling

The improved method of filter sampling off-line analysis using both parallel plate organic denuder and backup filter has a good agreement with in-situ online measurement.

同时采用平行板有机物扩散吸收管和后置膜的离线分析方法同在线观测的结果具有比较好的一致性。

The purpose of this study was to measure the gaseous inorganic acids / bases and volatile organic compounds emitted during the business of central Taiwan Science Park, and establish the air quality data. Two sampling sites were located in the north and south of the Park. The measuring instrument was the annular denuder system for inorganic acids and bases and the method for VOCs' measurement was according to Taiwan's EPA method NIEA

中文摘要本研究之目的乃在建立中部科学园区之空气品质污染物浓度资料，监测地点为基地北侧的土地公庙及南侧的国安国小，监测污染物包括空气中气状、粒状的无机酸碱及挥发性有机化合物等气体，监测仪器及方法依据则分别为环型扩散采样器及环保署环境检验所公告之NIEA A715.12B方法。

Methods Random cluster sampling method was adopted to select 6593 people of 3 villages as respondents of dermatosis epidemiological investigation.

采用随机整群抽样方法，选择3个自然村的6593人作为调查对象进行皮肤病流行病学调查。

The desorption efficiency was above 85%. The sampling efficiency was 100%.

解吸效率大于85%，采样效率为100%，样品在采样管中稳定时间24小时。

The desorption efficiency was above 85%. The sampling efficiency was 100%. The samples were stable for 24h.

解吸效率大于85%，采样效率为100%，样品在采样管中稳定时间24小时。

At the same time, the sampling method and the algorithm for generating new image is also described detailedly.

同时对参考图像的获取方法及新纹理图像的生成算法进行了详细的描述。

Flow, airway pressure and time was the three fundermental parameters which could detrude correlate respiratory mechanics papameters, time was desided by sampling introduce.

在完成软硬件的设计调试后，通过与呼吸机测试仪的对比验证了本系统能对呼吸力学参数进行实时准确可靠的监测。

Based on hexahedra vector finite element in ANSYS,a new orthogonal-reinforced hexahedra vector element is created by modifying vector basis functions.Due to orthogonality of sampling nodes and orthogonality of integral simultaneously,the new vector element can strengthen diagonal elements' predominance and quicken speed of solving system question group.

在ANSYS采用的六面体矢量单元的基础上，对矢量基函数作了一些增强正交性的修改，使其同时具备采样点正交性和积分正交性，得到了一种新的正交增强六面体矢量单元；这种新单元能增强系统矩阵的对角占优特性，加快系统方程组的求解速度。

A class of affine nonlinear system of single input-single output is investigated. Firstly, the nonlinear system is transformed into an equivalent linear system through a diffeomorphism transformation. The networked control problems for the delays are constant, stochastic and shorter than a sampling period, and long and stochastic are investigated respectively.

针对一类单输入-单输出仿射非线性系统，首先通过微分同胚变换实现了仿射非线性系统的无反馈精确线性化；然后基于精确化线性模型，分别讨论网络延时为常时滞，随机时滞小于一个采样周期和随机长时滞情况的控制问题。

The relation between difference equation and differential equation is studied by analyzing the mechanism in building grey models, and a "bridge" is set up between difference equation and differential equation by sampling theorem and state transition matrix.

通过对灰色系统模型建模机理进行深入剖析，利用采样定理和状态转移矩阵在差分方程和微分方程之间架起一座桥梁，通过算例仿真实验证明了该算法的有效性。

"Second Life is remarkably easy to work with, and is very popular,"

"第二次生命是显着容易的工作，并且很受欢迎，"

For example, we usually assume that materials are homogeneous and isotropic and free of internal defects or flaws.

为了得到适合有限元分析的模型，我们必须经过如图2所示的简化步骤。