By using the accurate inequalities of the electron density at the nucleus and radial expectation values for atomic systems derived by Gálvez and Porras, we separately construct two sets of precise criterion of the wave function, they are another precise criterion independent of energy to test quality of the wave function.

The large-stone asphalt mixes(LSAM) are used as flexible base on the Yichang-Changyang test section of the west expressway of Shanghai to Chengdu,and the nuclear density apparatus is used to detect the compactness of LSAM pavement.

In this paper,some problems have been successfully solved encountered in the fields of the Qin Shen high speed railway construction when the CPN MC 3 PORTAPROBE(Nuclear Density Apparatus) was used to test the effectiveness of roller compaction.

Differentiation and analysis on the comparative relation between the nuclear densimeter and sand replacement method;

The author proposed some advice on the application of nuclear densimeter for reference.

Study of atomic average covalence electron density in EET;

Calculation of electron density on γ-Fe(111),Co(0001),Ni(111),C(0001) crystal plane and valence electron structure analysis of catalyst action;

Experimental research on electron density in solid-rocket motor plume;

In order to provide a plasma environment of high energy and low density, vertical and parallel microwave input models are designed at the entrance of the plasma source to increase electronic density and temperature.

The numerical results show that the electronic energy spectrum is shifted, the chemical potential is not equal to the atomic energy level, the electronic density at each lattice point is changed, and the variation of electronic density at surfa.

On the base of the ionospheric occultation data from COSMIC system,we analyzed the max electronic density of ionospheric F2 layer(NmF2)over seismic preparation zone from April to the end of May.