constant adj. 1.恒定不变的,固定的,稳定的,恒久的;继续不断的。 2.不屈不挠的,坚韧的。 3.忠实的,有节操的。 be constant in love 忠贞不渝的爱情。 two days of constant rain 两天接连下雨。 constant to one's duty 忠于职守。 constant wind 恒风。 n. 【数、物】常数,恒量;恒定(值);(常)系数,率;【语法】(转换语法用语)定项。 the circular constant圆周率。 adv. -ly
The radiation loss was obtained from the imaginary part of the complex propagation constant and the transition loss was calculated by two - dimension overlap integral method 基于计算得到的直弯波导的模场分布,采用二维重叠积分法计算了两者连接时的过渡损耗。
Based on the semi - vector wave equation under cylindrical coordinate system , the mode distribution and complex propagation constant in bent waveguides were computed by a finite difference method with perfectly matched layer ( pml ) boundary condition 摘要以柱坐标下的半矢量波动方程为基础,采用基于完美匹配层( pml )边界条件的有限差分方法,对弯曲波导进行模式求解,进而得到波导弯曲引起的辐射损耗。