查询词典 sampling method

Then the effect of different target extraction algorithms on grating lobes was discussed in detail, a modified method based on 'abnegation method' was developed, which can achieve the optimal result in case of high sampling , simulation results prove that it is feasible.

对舍弃法进行了改进，改进后的舍弃法对自相关函数栅瓣较小的线性调频步进信号在采样率足够高的情况下，可以达到最优的处理结果，仿真结果证明了理论分析的正确性。

The method based on the frequency sampling is taken from the interpolation theory. The method based on the Chebyshev best uniform approximation theory can control the precision of approximation by limiting parameters.

频率采样脉冲波形设计法源于数值逼近理论插值法，所得脉冲波形有确定解析式；Chebyshev最佳一致逼近脉冲波形设计法属于均匀一致逼近，逼近程度能够利用参数进行限定。

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。

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。

We propose a unified method to approximate important geometric attributes, including normal vector, gauss curvature, mean curvature, principal curvatures and principal directions on point sampled surface. Based on MLS projection our method is robust to noise and stable to the sampling density.

曲面的微分性质包括法向量和切平面、高斯曲率、平均曲率、主曲率和主方向，在计算机图形学、机器视觉和计算机辅助设计等领域发挥了重要的作用，比如曲面绘制、内外测试、曲面重建、曲面简化、去除曲面噪声和模型分割等。

This thesis contributes to geometry compression in the following aspects: Proposes a method of progressive spherical mesh parameterization based on local parameterization by directly projecting the deleted vertices to its neighborhood. Based on spherical mesh paramterization, an adaptive subdivision remeshing method by progressivly redistributing of sampling points is proposed, by this means, the main geometry information of the original mesh can be captured with only a small amount of samples, it can also be used in mesh simplification. By regarding attributes binded on mesh vertices as geometry signals and transferring them onto a uint sphere by means of spherical mesh parameterization, meshes with different attributes are compressed with spherical wavelet successfully with high compression rate. As a kind of lossy geometry compression technique, two mesh simplification algorthimes are also presented in this thesis.

归纳起来，本文的主要贡献有：提出了以直接投影局部参数化方法为基础的网格累进球面参数化方法；在网格球面参数化方法的基础之上，提出了一种基于累进优化布点方案的网格细分采样方法，该方法可以用很少的采样点就可以捕获到网格的主要特征，因此我们也将其用于后面的网格简化工作当中；通过将网格顶点上定义的各种属性看成几何信号，并以网格球面参数化为手段将几何信号迁移到单位球面上，从而成功地实现了用球面小波对各种几何信号的压缩；作为一种有损压缩方法，本文还提出了基于统一距离的网格简化算法和基于重采样的网格简化算法。

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。

Inverse Distance Weighted method is sensitive to the distance and circle distributions are found around sampling point. IDW is an accurate interpolation method in case of the field information diffused from some center points.

距离反比法插值对距离比较敏感，出现很多以采样点为中心的圆形分布，在以点为中心呈扩散状分布的农田信息，采用距离反比法具有较好的插值效果。

Firstly a qualitative criterion for determining the space between adjacent sections in the sampling process and Gaussian smoothing algorithm is proposed. Then a topological reconstruction method is given. At last a new reconstruction method based on the similarity between adjacent sections is proposed.

首先提出了确定断层间距的定性方法和数据平滑处理的高斯方法，然后给出了一种拓扑重构方法，最后提出了一种基于相邻层轮廓相似性的曲面重构新方法。

First, sequential tomograms of the hip are obtained from a CT scan; secondly, an accurate and automatic method is used to extract the profile of the acetabulum; thirdly, a hybrid method is utilized to gather fiducial marks on the acetabulum; fourthly, bulky error sampling points are removed. Finally, an ellipsoid fitting method is used to fit the ellipsoid model of the femoral head. Two male sufferers with different necrosis extents are chosen as experimental subjects for contrastive simulation.

首先利用一种精确的自动分割方法在髋骨部位CT序列图像中提取髋臼轮廓；然后使用基于等距栅格采样法与辐条式采样法相结合的混合采样法得到髋臼凹面的空间坐标点集，并剔除其中的误差采样点；最后采用基于二次曲面一般方程的方法拟合原始股骨头椭球面模型。

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。