以下为句子列表：
英文: Abstract: The characteristics of wavelet transform and its significance in image edge extraction are presented.The detailed steps for the extended target centroid calculation with wavelet transform are described.Extracting target(airplane) centroid coordi
中文: 文摘:介绍了小波变换的特点及其在图象边缘提取中的意义,说明了扩展目标用小波变换进行目标形心计算的详细步骤,并以飞机图象为目标在不同图象模糊程度及背景噪音情况下用小波变换进行了目标形心坐标提取,比较了不同图象模糊程度及背景噪音情况下目标形心坐标提取的精度,展示了小波变换在扩展目标跟踪技术中应用的前景。
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英文: By analyzing the model of radio wave propagation loss, this paper provides a weighted centroid localization algorithm that uses coefficients, which are decided by the influence of beacons to unknown nodes, to prompt localization accuracy.
中文: 文中通过对无线电传播路径损耗模型的分析，提出了加权质心定位算法，用信标节点对未知节点的不同影响力来确定加权因子，以提高定位精度。
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英文: For every point on contour curves, the support area and support radius were first calculated based on actual distance of adjacent pixels, end points were obtained with linear interpolation technique; Next, the distance between point and its centroid of su
中文: 摘要首先基于相邻像素间的欧氏距离计算出轮廓曲线上每一点的支持区域及支持半径，用线性插值得到支持区域的端点；然后求得支持区域的质心，以曲线上的点和其相应的支持区域质心之间的距离作为特征响应筛选出候选特征点；最后将具有局部极大特征强度的点作为多边形的顶点。
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英文: For the contaminant plume examined in this synthetic example study the spatial second moments defining the spread of the contaminant plume around its centroid increase with the enlargement of the variance of hydraulic conductivity distribution, while the
中文: 实例研究表明，污染物在含水层中运移过程中污染羽的展布范围（二阶矩）随着渗透系数空间变异方差的增大而扩大，而污染羽在空间上的质心位置（一阶矩）基本不受方差的影响，仅取决于渗透系数随机场的均值大小。
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英文: Study on an automatic selection method for spot centroid detection window of Hartman wavefront sensor
中文: 哈特曼波前传感器光斑质心探测窗口的自动确定方法研究
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