The relation of directions of phase constant and attenuation constant in conductive media;

The electric properties of coaxial cable, such as its characteristic impedance, screening attenuation, attenuation constant, and loss of echo wave, are related to the physical mechanism of the skim effective resistance, electromagnetic field, distribution par.

By the experiments,factors that effect decay of residual chlorine that happens in bulk water are analyzed and observed that the bulk decay constant changes associated with the water temperature,initial chlorine concentration,and total organic carbon.

In this paper laser excited(excitation at 266nm) fluorescence decay constants of YAP:Ce scintillation crystals with different sizes and various Ce~(3+)dopant concentrations were measured.

The characteristic impedance,acoustic theory,absorption coefficient and decay constant of the sound absorption functional rubber were introduced,and their research progress and applications were investigated.

Analysis of attenuation coefficient and cutoff character in waveguide by finite difference method;

We compared the theoretical attenuation coefficients of THz radiations with different incident frequencies in hollow circular waveguides with a bore diameter of 2mm with different metallic coating films of Au,Pb and Ni,and,for a given incident frequency,calculated the relationships between attenuation coefficients of the dominant mode TE11 and the bore diameters of hollow wav.

This paper describes the application of finite difference method and Fortran program to obtaining the cutoff frequency and attenuation coefficient in isosceles right triangular waveguide and pentagonal waveguide.