On the basis of introducing matrix code disk, the determination methods ofcode track pattern directions of nomal and non-normal matrix code disks are analyzed, the testing methods of errors of the phase relations between matrix disk code tracks and between different circles-angle magnitude and line magnitude comparing methods described, and finally a discussion on measurement errors is given.

This paper proposes a scheme of 4x3 matrix keyboard based on embedded Linux and S3C2440 CPU.

This paper proposes a scheme of matrix keyboard based on embedded Linux.

Designing 4×4 matrix keyboard controls with single chip AT89C2051,it conveniently realizes 2421 code and so on other coded forms as the procedure partial modifies slightly,and it also may expand the BCD code output in this circuit foundation.

This design uses EM78P451 to take the keyboard matrix and the correspondence signal code,launches by the 2FSK modulation way the 27M modulated carrier wave signal;Receives the part then uses MC3361to take the receive module,demodulates the signal after the MA6135 decoding to be able to communicate with computer directly.

This paper researches the mechanism of matrix code,discusses algorithm skeleton and characteristics,comparatively fully depicts selection,crossover and mutation operators which are often used in matrix-coded genetic algorithm,and introduces some future research work as well.

It expatiates on the progesses in matrix-coded genetic algorithm research field,researches the mechanism,discusses algorithm skeleton and characteristic,and introduces some future research work.

Study on optimization of matrix encoding in auto-generating test paper system based on genetic algorithm;

One space field information hiding algorithm based on matrix encoding

Genetic algorithm with matrix encoding, different mutate operator, crossover operator and the selection operator based on order rank selection algorithm was applied to solve the problem.