Force analysis and calculation of workover string in the slanted and horizontal well are the basis of designing and checking string strength, selecting tools an
Honeycomb panel is consisted of 3 layers that are double-faced sheets and honeycomb-shaped core. It is highly desirable for ship, railway, and aerospace industr
This paper investigates four classes of functions with a single discontinuous point. We give the sufficient and necessary conditions under which the second orde
In this paper, we study properties of solutions to doubly nonlinear reaction-diffusion systems with variable density and source. We demonstrate the possibilitie