On the research of induced subgraph of the set of vertices of odd degree,a method was obtained.

The number of limit cycles of generalized Liénard system surrounding multiple singular points;

Discussion on functional sampling near limit point of listable singular points;

On the Existence and Uniqueness of Limit Cycles for Lienard-Type Eqations with Multiple Singular Points;

Aiming at the problem of the odd point in the calculation of rotors torsional vibration characteristics by using the improved Riccati method, this paper presents a new viewpoint about how to confirm and remove the lost root and the added root of equation.

The odd point of plane differential systems =-y+δx+axy+my 2+ly 2n+1 , =G(x), is studied.

Application of Creen formula with singularity in the boundary of integral domain;

To resolve this problem that the original methods can′t efficiently distinguish MECG interference from EHG signal,this paper applies the method based on the singularity check of wavelet transform and the signal reconstruction of modulus maxima to remove the MECG interference in EHG signal, by using wave characteristics of MECG interference.

Three-dimensional source distribution theory is used to calculate the wave forces of immobile floating bodies,and the problem of singular points in different Green function is solved.

According to the property of the singular points, we construct a direct methods for Determining the positions of a class of turning simple bifurcation points.

The method for correction of singular points of wells and the calculation method of well row replaced by a ditch in the numerical FEM and FDM computations were proposed in this paper.