In this paper, we prove another claim of Hong stating that 270 is the secondleast primitive singular number.

The interaction and energies of mesic atom and hyperon atom of both the strange exotic atoms are further studied.

Using program of singular function to calculate internal forces of bending pole;

There is a mistake about singular function calculation in the book of "Electric Circuit",which is widely used as the textbook by many colleges.

By means of singular functions, the equations of moment, torque and bending section modulus are given and the general expressions are derived for calculating the torsional stress, angle and deflection of the shaft under complex loads.

Method of establishing the deflection curve of a beam by singularity functions;

Study of the elastic mechanics problem in narrow rectanglar girder by the singularity function;

Based on the improved story analysis model that is used to be widespread, the author sets up a new model with rigid-suspended-joints in core-tube suspended structure, and deduces flank-displacement rigidity matrix used singularity function.

In this paper, some existence results of solution of following an elliptic equation with singular coefficients -u-μu|x| 2=u 2 *-1+λu q-1|x| σ,x∈Ω;u>0,x∈Ω;u=0,x∈Ω are studied by virtue of Hardy inequality and the Mountain Pass Geometry.

The existence of biharmonic problem with sub-critical exponent and singular coefficient Δ~2u-μu[]|x|~s=f(x)u~(q-1)+u~(p-1) are proved by using the mountain pass theorem and Sobolev—Hardy inequality.

The existence of solutions for a class of critical elliptic equations with singular coefficient is,under certain conditions, discussed by using variational methods and Hardy inequality, two sufficientconditions for existence of solutions are obtained.