propagation constant

it may be equivalent described as in terms of medium parameters ( electric/ magnetic dipole moment, permittivity, permeability), or in terms of transmission-line parameters ( impedance/ admittance, propagation constant, characteristic impedance).

它或可等效的应用介质参量（电/磁偶极距、介电常数、磁导率）来描述，或可等效的应用传输线参量（阻抗／导纳、传播常数、特征阻抗）来研究分析。

By using the equations for the stable propagation period of constant amplitude loading fatigue cracks, the fatigue life of the welded box girders of bridge gantry cranes is estimated.

以等幅载荷疲劳裂纹稳定扩展阶段的计算公式为基础，针对起重机承受随机载荷的特点，运用时间循环法，估算了桥门式起重机焊接箱形梁的疲劳裂纹扩展寿命。

Monte Carlo method has been developed to estimate the chain propagation constant and exchange reaction constant. In average, one exchange reaction will occur after approximate six monomer molecules insert into the growing chain.

应用Monte Carlo方法模拟聚合反应中链增长和链交换反应速率常数，结果表明每一个活性中心接受约6个单体插入后发生链转移反应结束该聚合链增长。

Determination of Propagation Constant from Phase Information of Standing Waves

利用驻波相位信息确定传播常数

Under the condition that the propagation constant k> 0, the paraxial expression for ultrashort pulsed Gaussian beams with constant diffraction length in a dispersive medium is derived eliminating the spatial singularity.

提出存在于光束传输中的隐含条件k＞0式，得到等衍射脉冲高斯光束在色散介质中的无非光束行为的傍轴传输方程。

By using the angular spectrum and complex analytic signal representations, the analytic propagation expression and its Fourier spectrum for ultrashort Gaussian pulsed beams with constant waist width in the far field are derived.

利用角谱法和复解析信号法推导出了等束宽超短高斯脉冲光束在远场的解析传输公式及其傅里叶谱。

The values of k, chain propagation rate constant ( kp) and chain transfer rate constant ( Ktr) increased with the increase of polymerization temperature.

链增长速率常数和链转移速率常数均随聚合温度的升高而增大。