The influence of pore characteristics on rock fragmentation mechanism by high-voltage electric pulse

High-voltage electric pulse(HVEP) is an innovative low-energy and high-efficiency technique.However, the underlying physics of the electrical breakdown within the rock, and the coupling mechanism between the various physical fields involved in HVEP still need to be further understood. In this study, we establish a 2D numerical model of multi-physical field coupling of the electrical breakdown of porous rock with randomly distributed pores to investigate the effect of pore characteristics(porosit...     

三菱FX系列PLC的定时分析

定时器是PLC编程时使用最广泛的编程元件之一,定时器的正确合理使用,是PLC正确完成控制任务的关键.就定时器的定时精度、使用和定时器延时OFF的方法做了较为详细的分析.