In view of the setting of twice crossing in the intersections which use the all-in-one design for the nonmotorised transport,this paper has analyzed the influence of the signal operating modes on mobile,bicycle and pedestrian crossing.

Authors analyzed the twice crossing from the use of spacetime resource and pedestrian delay,and built the formula of pedestrian delay based on the design of signal system for pedestrian crossing.

Features of brine refinement process and secondary filtration process in Wuhan Gehua Group Co.

Distorsion,corrosion,erosion and abrasion mechanisms,concerning the faulty section,of the boiler s secondary superheater were studied by on-site measurements and by samples,cut from the tubes.

The treatment process after the action of secondary overvoltage protective device of bushing type current transformer of 500kV shunt reactor is analyzed in brief,and it is proposed that the unsuitable location of secondary overvoltage protective device will bring many difficulties to the safe operation and maintenance of power grid.