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A new research of identification strategy based on particle swarm optimization and least square
Tong ZHANG, Yahui WANG, Anli YE, Jian WANG, Jianchao ZENG
Front Elect Electr Eng Chin. 2009, 4 (3): 313-317.
https://doi.org/10.1007/s11460-009-0047-5
Within the heat and moisture system that is complex in the air-conditioning rooms of large space building, the existence of delay makes the stability cushion reduced, which thereby makes the estimated parameters more complex. In this paper, particle swarm optimization (PSO) is integrated with least square (LS) to improve least squares (short for PSOLS). LS, optimized by PSO, identifies the heat and moisture system parameters of the existence of delay in the air-conditioning rooms by sampling input and output data. In view of this delay system, the identification is an effective solution to nonlinear system which LS can not identify directly. The simulation results show that PSOLS is quite effective, and its global optimization has great potential.
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Design of tooth color measurement system based on silicon double P-N junction color sensor
Zengliang SHI, Dali LIU, Yu WANG, Xi CHEN, Shiying BAI, Jingwei XU
Front Elect Electr Eng Chin. 2009, 4 (3): 318-322.
https://doi.org/10.1007/s11460-009-0045-7
Working principles of silicon double P-N junction color sensor are introduced and a color measurement system to distinguish tooth color difference is designed in this paper. This system consists of silicon double P-N junction, a small optical fiber probe, signal process circuit and an MSP430FG439 single-chip system. Small in size, this system can measure different parts of the tooth in a fast and convenient way with high-accuracy. Thus, this system will be very promising in building prosthodontics and tooth fabrication.
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