Introduction.Lamentations remain an enduring national treasure of the Mordovian ethnos.They do not only offer the richest cultural and historical information, but also represent a living existence of the past in modern times.Based on the research and the folklore material, it gives a generalized characteristic of poetic devices and visual and expre
Recent years have seen the widespread use of a new gob-side entry retaining technology, namely, automatic roadway forming based on roof cutting and pressure relief.However, because of the complex geological conditions, stability control methods for the surrounding rock remain unexplored.In this paper, through theoretical analysis, field socksmith s
In this article, we will investigate a retarded van der Pol-Duffing oscillator with multiple field recordings dry hop pet nat delays.At first, we will find conditions for which Bogdanov-Takens (B-T) bifurcation occurs around the trivial equilibrium of the proposed system.The center manifold theory has been used to extract second order normal form o