The digital images are composed of griddling with fixed space between each other, so the simplest chain codes is following the verge and give the direction-value to the linked line of every two adjacent pixels. 数字图像一般是按固定间距的网格采集的,所以最简单的链码是跟踪边界并赋给每2个相邻像素的连线1个方向值。
Calculation formula used for double wires welding is deduced based on twin ellipse heat source model and suitable finite member model is built and calculation workload is efficiently reduced with transitional griddling partition technology. 以双椭球形热源模型为基础,推导出用于双丝焊的计算公式,建立了合适的有限元模型,用过渡网格划分技术有效减少了计算工作量。