According to this proposition, the author of this text attempts to analyze the execution strength of our government and put forward the corresponding suggestive measure; Especially in socialist new period, under the leadership of the scientific development view of " human-oriented , develop harmoniously ", as one administrative researcher , the author want to seek truth from facts, especially from the practical problem to the people and the things which closely relate to the people,so as to improve the people's living standard , the trust sense and the pride sense to our government.

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This text introduce a sort of new pattern soft switch PFC circuit .First, analyze the develop course of the on-off power supply. Second, relate the harm of humorous wave to the commonality electricity net. Third, present the topology and the principium chart of the soft switch PFC and analyze it .At last ,set the parameter and simulates the converter of with matlab simulation. more over ,get the hold of well voltage and current wave , minish the spoilage of the circuit, enhance the efficience of the circuit, meet the demand of the miniaturization and viridity.

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Basing on the mechanism of the kinetic electron emission, we analyze the factors which relate to the kinetic emission yield, and finally get the relation between kinetic electron emission and impacting velocity in theory.

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