Through analyzing the power flow in a switch network, a calculation method and formula and its program block diagram of conductance ratio of every switch are put forward in this paper.

NKJ-1 model crop drought resistance identification instrument was manufactured on the basis of continuous rising temperature conductance method (CRTC). Put forward first by Chen Yuquan etc.

For the water volume fraction measurement of oil-in-water flow, the mathematical model for the forward problem of sensitivity field in the ring-shape four-electrode conductance sensor was analyzed.