抽样

The linear sampling method for the inverse scattering problem of acoustic waves is based on the fact that: a linear integral equation of first kind-far field equation including a parameter has an unbounded solution as the parameter approaches the scattering boundary from inside.

本文在此基础上就Dirichlet边界条件的声波反散射问题，利用积分方程理论严格证明了线性抽样方法对其的可用性，具体数值例子表明该方法是有效的。

Based on Monte-Carlo method working space of the 4-DOF picking manipulator is analyzed in this paper .

利用基于随机抽样的蒙特卡洛方法，对4自由度采摘机械手的工作空间进行了分析。

Furthermore, some new conclusions were drawn for a particular general form, and the general form was extended to the n-dimensional general marginal density function.

针对具体的广义形式，得出了多个新结果，并将密度函数广义形式推广到n维，最后讨论了这一广义形式在舍选抽样中的应用。

At first, a graph about the environment can be built based on the sample data generated from a Markov decision process.

首先，基于马尔可夫决策过程抽样得到的样本数据建立环境的图论描述。

There is no statistical or mathematical formula to establish the right number of samples to be taken during an audit.

没有统计的或者数学的公式可以用来确定审核时候抽样数值多少是正确的。

For results based on the total sample of national adults, one can say with 95% confidence that the maximum margin of sampling error is ±2 percentage points.

对于结果的基础上，总样本国家的成年人，一可以肯定地说， 95 ％的信心，最高幅度，抽样误差是± 2个百分点。

The study uses literature survey, multidimensional scaling analysis, and questionnaire survey. First, the researcher divides visual situated websites into six styles, and randomly chooses samples from these ones. Through on-line questionnaire survey, the study discusses user perception on the eight constructive elements of the interfaces in visual situated websites and on the operation items as "usability","pleasure","interaction","immersion", and "memorability".

本研究采文献调查法、多元尺度法与问卷调查等法，首先将视觉情境式多媒体网页分类为六种风格，并从中挑选代表性样本，以随机抽样进行网路问卷调查，探讨使用者对於视觉情境式多媒体网页介面八项构成元素，以及使用者对操作之「使用性」、「愉悦性」、「互动性」、「沉浸性」、「易记性」等项目的看法。

Methods 129 Zang nationality students and 103 Han nationality students were investigated by the Mental Health Test randomly.

方法采用随机抽样法，抽取了南昌市17中藏班129名和汉班103名学生，使用MHT量表测查其学习生活适应性情况。

In data space, multi-stage anti-aliasing digital filters are designed on the basis of the Nyquist sampling theorem and the minimax criterion to ensure that the observational data are sampled and stored without distortion.

在数存空间内，依据奈奎斯特定理和最大误差最小化的原则，设计多级抗混叠数字滤波器，使实测数据经过滤波器后，达到无失真抽样与存储的目的。

Therefore, the minimum variance and deviation methodology was introduced, based on which, stratified random sampling technology was used for sample design, and thus making an overall assessment more truly on water quality in distributi.

为此提出以最小方差和偏差的方法论，采用分层随机抽样技术进行样本设计，从而对管网水质进行较为真实的全面评价，同时对影响管网水质的因素进行分析。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。