The calculating theory of tactical target such as the best baseline and undershooting quantity under blinking jamming and the best flickering period are analyzed.

A pulse xenon light source used for 3CCD camera photographic system is designed, the spectral features and trigger mode of the light source are introduced, and the important parameters including flash duration and flash frequency are also calculated.

Effect of photoperiod on marine microalgae Prorocentrum donghaiense;

Effects of temperature and photoperiod on diapause of housefly larvae;

Effects of interaction of photoperiod and nitrogen on activities of enzymes of carbon and nitrogen metabolism of Huanong No.1 ensilage corn;

and Phaeodactylum triconutum were cultured in modified f/2 medium, and the influence of light-dark cycle on the production of extracellular polysaccharide was investigated.

The design method and its techniques of the sugarcane light period room and hybridization greenhouse are presented, the affect of the greenhouse construction to its indoor environment is also discussed.