Estimation method of oxygen consumption coefficient K_1 in water quality model;

Through parallel biological experiment,the article discusses the interrelation of the oxygen consumption coefficient and the ratio of CBOD and NBOD .

The results reveal that the power spectrum curve in the inertial subrange for the forest CL can be expressed by a power law, but the power exponential is less than -2/3; turbulent scale in the forest CL tends to decrease; the dissipation coefficient in the upper forest CL is greater than that in the lower forest CL; momentum and momentum flux decrease with the in.

The dissipative coefficient was introduced and used as an index to ev.

The effects of the length,position and loss coefficient of the fiber that connects the LPGs on the cascaded LPG spectral characteristics are discussed.

For the polymeric electro optic waveguide, approximate expressions of propagation constant and loss coefficient are derived by using perturbation theory according to coupled mode theory of the ideal optic waveguide, thereby complicated complex calculations for finding the solution of eigenvalue can be simplified to simple real calculations.

By theoretical calculation, the wave-length range and K value at nr <1, as well as loss coefficient, a= 0.