This paper is the first report on daily and month changes of its court-calling and use the result of investigation to estimate the adult density through calling characters.

Low-density fiber shaped objects were prepared by adopting different materials (shaving and fiber)and different hot-pressing methods (conventional hot-pressing and microwave hot-pressing),and the products prepared were examined.

In this paper,interfacial internal waves in N-layer density-stratified fluid with background current were investigated by using a perturbation method,and the second-order asymptotic solutions of the velocity potentials and the second-order Stokes wave solutions of the associated elevations of the interfacial internal waves were presented based on the small amplitude wave theory.

Investigation of density consist of coal by use of the technique of solid-liquid fluidization;

8%, tensile intension and fiexural strength of nucleated polypropylene resin increases 15%, flexural modulus increases 35% and crystallization peak temperature increases 10 ℃ as well as nucleation density calculated from nonlinear Volterra integral equation increases 10.

The influence of micro powder grain size of diamond used to substrate abrasive surface pretreatment on the diamond nucleation density is large on single crystal silicon substrate,but it is not too large on W and WC 6%Co cemented ca.

The nucleation density was three orders higher than it on smooth silicon substrate with no pretreatment.