in order to solve the problem, the calculation formula of microwave attenuation constant and phase constant of weakly ionized dusty plasma was deduce.

为了解决这一矛盾，在尘埃等离子体理论基础上，导出了弱电离尘埃等离子体的微波衰减常数和相位常数计算公式。

the attenuation constant is in proportion to the density of the scattering dots, and also increased with the laser beam energy that records the information dots.

结果表明，波导侧面散射光强沿传导光传播方向的分布呈指数衰减规律，其衰减常数与信息符密度成正比，还随记录信息所用的激光束能量的加大而增长。

the attenuation constant causing by radiation is obtained.

首次获得了由于辐射引起的衰减常数；

propagation characteristic of uhf radio wave in rectangle , circle and arched tunnels is studied in this paper and the computing equation for attenuation constant is deduced.

研究uhf频段的无线电波在矩形、圆形和拱形隧道中的传播特性，推导了衰减常数的计算公式。

as an example, the operation frequency of tt&c and data transmission(ttc&dt) and the attenuation constant of electromagnetic wave through the blackout zone are estimated.

作为一次练习，估算了测控通信系统的工作频率、电波穿过「黑障」区的衰减常数；

furthermore, the formulae of transmitted power, loss power, attenuation constant and equivalent impedance for tm and te modes are deduced.

此外，推导出波导tm、te模的传输功率、损耗功率、衰减常数、等效阻抗等特征参数的边界元公式。

there is a heavy attenuation property and there exist sensitive relationships of increase function between attenuation constant and frequency, porosity, osmotic coefficient;

具有强衰减性，衰减系数与频率、孔隙度和渗透系数间存在敏感的增函数关系；