The optimal logic design method of the relay combination step circuits is presented from the goal in economy,reliability and convenience for maintenence.

New method testing the double fault of combinational circuits based on Boolean partial derivative.;

An algebraic method for detecting single fault of combinational circuits based on D algorithm;

Test set compaction for combinational circuit based on compact genetic algorithm;

Evolutionary Design of Combinational Circuits Based on Improved Genetic Programming;

A genetic algorithm was used for test generation, and the experimental results on some combinational circuits demonstrate the f.

The fault coverages achieved by the test generation procedures based on genetic algorithms are smaller than the deterministic test generation procedures for combinational circuits.

With the growth of the scale of integrated circuits,the design for test for combinatorial circuit in the chip and particularly in the SOC is becoming more and more important.

An engineering calculating method for the static characteristics of hybrid step motors is presented.

Based on an overall review of related papers published at home andabroad about the step motor subdivision control theory and technology, thisdissertation designs a fully digital three-phase hybrid step motorsubdivision drive system, which based on the digital signal processorTMS320LF2407A, to avoid the vibration and noise of hybrid step motor atlow frequency.