目前，红细胞边缘形态的检测一般都是利用传统的边缘检测方法，如边缘临近一阶或二阶方向导数法，利用简单的方法来检测边缘。
At present, the methods of edge detection of erythrocyte are using traditional theory such as edge one-order or second-order orient differential coefficient and using simple methods to detect edge.
本文在简单介绍了有机非线性光学和极化的原理后，综述了聚合物二阶非线性光学材料的研究进展。
After a brief introduction to the principles of organic nonlinear optics and the procedures of poling, the progresses of polymeric second order nonlinear optical materials are reviewed.
二阶系统的设计极为简单，三阶系统需采用伴随因子法设计，当应用于同步电机的的励磁调节设计时，所得到的小信号性能指标能充分满足国际标准的推荐要求。
The design of 2 order system is very simple, 3 order system have to use the adjoin factor method. Based on models of these control systems, the small sign…
详细推导了在极坐标系下的谱元方法的具体计算公式，求解了极坐标系下的简单椭圆型二阶偏微分方程；
The formulas of the spectral element method in polar coordinate are induced and described in detail. Spectral element method is a high-order weighted residual technique.
详细推导了在极坐标系下的谱元方法的具体计算公式，求解了极坐标系下的简单椭圆型二阶偏微分方程；
The formulas of the spectral element method in polar coordinate are induced and described in detail. Spectral element method is a high-order weighted residual technique.
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