查询词典 sampling method

The two-dimensional sampling using two transects meet at right angles was applied to get quadrat data in this study.The detrended correspondence analysis ordination technique combining pattern analysis method is used for community pattern analysis here.

用垂直相交的两条样带在两个方向上同时取样的二维取样法，获得数据，用DCA排序与格局分析相结合的方法，得到群落不同格局规模斑块的长、宽及面积，实现二维格局研究。

Third, we conducted in-depth interviews of 8 persons in 9 times, who were sampled by quota sampling method.

最后以配额抽样法在研究场域针对调解人、召集人与公正人士共抽样8人做9次的深度访谈，得以架构出研究概念并整理研究发现。

Finally, the paper, taking Congaing Branch of CCRI as a case, analyzes the change of its motivation mechanism for human capital in the course of system transformation and stress is put on the analysis of staff members demands and the reinforcement means to be taken by choosing investigation objectives with mutual-controlled quota sampling method, interview and questionnaire investigation.

最后以煤炭科学研究总院重庆分院作为案例，分析了该院人力资本激励机制在转制过程中的变化，用相互控制配额抽样法选出调查对象，采用面谈和问卷调查相结合，重点分析了职工的需要和采取何种强化手段。

Through literature review and advanced research, this study developed the related scales –"knowledge sharing intention scale,""team culture scale" and "service innovation performance scale." Using the quota sampling method, questionnaires were distributed to 36 international tourism hotels. Six hundred twenty one valid surveys were returned from 23 hotels.

研究者透过文献与前导研究，发展出本研究之相关量表-「知识分享意愿量表」、「团队文化量表」及「服务创新表现量表」，以配额抽样方式对36家国际观光旅馆进行问卷施测，有效问卷共回收621份（共23家）。

On the basis of comparison of several algorithms of the calculation of unstable resonator"s mode. Fast Fourier transform method is chosen in this paper. The model of multi-layer distribution of gain is established. Sampling granularity in real space used in FFT, quotient of guard band and distance between subsections are made certain respectively. The convergence criterion of root-mean-square of plural y which is the quotient of the optical field"s distributions separated by one pass is established. Under the circs of multi-kind of distribution of gain and different measurement of distortion, the output optical field distribution is calculated.

在比较了各种计算腔模方法的基础上，根据角谱传播理论，选择FFT算法，建立谐振腔内多层增益分布模型，分别确定了FFT算法的空间采样间隔、保护带系数和分段计算的距离，选取光场往返一次之比的均方根值收敛准则，计算多种增益分布、不同镜面变形时的谐振腔输出光场分布，同时计算该光场的远场分布和传输有限距离之后的分布。

According to the characteristics presented by armed helicopters during cruising or searching for ground targets, this paper has established the mean-square deviation stationary random model of helicopter tracks. It is an important method to decorrelate the measure noise by estimating the parameters of the color noise online. Kalman filtering and forecasting have been made with helicopter tracks. The simulated study has been carried out on helicopter tracks under the condition of color noise. It is very difficult to get an accurate and reliable prediction when the data is very limited. The paper make use of the theory of grey system to resolve the problem of prediction of helicopter tracks, establishing the GM model of grey systems and the cumulative residual error model of n degree, then correcting the GM forecast model. In the period of sampling, GM model and residual error model have been established on line to improve prediction precision.

结合武装直升机在巡航或搜索地面目标的特点，给出直升机航迹模型为协方差平稳随机模型，在线估计有色噪声参数，对测量噪声去相关，对直升机航迹进行卡尔曼滤波与预估，最后对有色噪声条件下的航迹进行了仿真研究；在数据非常有限的情况下，准确地预测又很困难，本文提出了用灰色系统理论解决直升机航迹预测问题，建立了灰色系统GM预测模型和n次累加残差模型并对GM预测模型进行修正，在每个采样期间内，实时在线建立GM预测模型和残差模型以提高预测精度。

Methods Using random sampling method,the patients were divided into two groups and each group had 25 cases.

采用随机抽样法将患者分成两组，每组25例。

Methods Individual interviews and random sampling method was applied.

采用个别访谈和随机抽样的方法。

Methods Stratified random sampling method was adopted to select 4077 peasant workers from 10 enterprises to conduct questionnaire survey.

采用分层随机抽样的方法对10家企业4077名农民工的职业危害相关知识进行问卷调查。

Using random sampling method to improve the classifier in the non-equilibrium generalization performance on data sets.

使用随机抽样的方法以提高分类器在非平衡数据集上的泛化性能。

Many will continue to choose to live in duality and in conflict.

许多人将继续选择活在二元对立性和冲突中。

I find that students of the University of Physical Education all wear sportswear at first sight.

我发现：体育大学的学生乍一看，都是穿运动衣，大家都一样