The process and mechanism of ion nitriding with pure nitrogen were studied by way of continuous nitrogen supply simultaneously with vacuum pumping and furnace shutdown after intermittent nitrogen supply,respectively,under cathode voltage of 500,600,650 and 700 V.

In consideration of the problems of low efficiency of walking-beam pumping units and electric energy stolen in the oilfields, a new device, which is power saving and electricity-stealing prevention, is developed for voltage regulation and intermittent power supply for the walking-beam pumping units.

:duty ratio,frequency and polarization potential of cathodic protection (CP) by intermittent power supply on effectiveness of protection for carbon steels were investigated by experimental methods.

As for those problems mentioned above,a method of intermittent power supply of constant voltage source is introduced in this paper,which.

But in the middle and lower reaches of Chang-Jiang river,because it is not very cold in winter,the research indicates the insulated inner wall can improve the comfortableness of the human body in the room with intermitting heating.

Directing against the relationship between the thermal comfortableness of human bodies and the room and the inner wall temperature, a mathematical model was proposed and tested for the room temperature response to the intermitting heating in a room with walls built with composite materials.

Model of the intermittent heating process of a hot water heating system;

Initial investment and operating cost are calculated for continuous heating and intermittent heating of different buildings in different places to establish the economical operation of heating sys-tems and the required capacity of necessary equipment,find out the more economical way to run the heating system and corresponding economical equipment capacity.

This paper introduces several continuous supply and intermittent supply orientated amputators for reel material of packing machine.

By simulating the infiltration of intermittent application dynamically, the infiltra-tion mechanism of surge irrigation and the quantitative index describing the effect of surgeirrigation are studied.