The mathematical model method is used to simulate the frequency dispersion and amplitude distribution for fifteen Jurassic coal seams in Datong coalfield.

The first and the third flexure models and their amplitude distribution of piezoelectric beam are tested.

With the traditional estimation of parameters of amplitude distribution for radar clutter, the whole region scattering clutter is under consideration.

Meanwhile, we analyse some methods of clutter series production that submits amplitude distribution and power spectrum distribution,presenting the approach of each model simulation.

This paper summarizes the statistical models of radar clutters,including amplitude distribution and power spectrum models,as well as the corresponding types of clutter,analyses some methods of generating clutter series that submit to amplitude distribution and power spectrum distribution,and presents the simulation process of each model.

Some comments and arguments on the distribution amplitude of Bc mesons are given.

QCD running coupling constant and different pion distribution amplitudes are explored in detail.

To prove the validity of our method, we place our focus on comparing the effects of different distribution amplitudes on the prediction of physical observables.

To solve the fatigue life prediction problem of structures under bi-modal stress power spectral density in the frequency domain,this article presents a model of rainflow amplitude distribution of bi-modal stress power spectral density and provides a method to estimate its parameters.