Studies on ecological amplitude of reed to the environmental gradient of water depth;

Research on Ecological Amplitude of Nutrition Restrictive Factors in the Changjiang and Jialing Rivers Interjunction in Chongqing;

In order to study the relationship of nutrition and algae,and search after the mechanism of eutrophication,the ecological amplitude principle is used to study the nutrition restrictive factors.

First the relations between random coefficients and the stable amplitude of the self-exited vibration are built up by numerical calculation and a BP network, then the statistical property of the stable amplitude can be calculated directly by num.

First, the equation for limit length of slope buckling failure in all cases, considering the component vertical to rock layer due to gravity, was established by using modality amplitude equation of equilibrium stability derived by post-buckling energy criterion.

In accordance with deformed specifities of all kinds of bedding rock slope,this paper studied the regions nearby equilibrium bifurcation point, limit lengths of slope buckling failure and evolutions along equilibrium path by using modality amplitude equation of equilibrium stability built on post-buckling energy criterion.

This scheme can greatly reduce sampling frequency,eliminate the effect of the parasitic amplitude modulation and overcome the carrier frequency drift.