The paper analysed the current approaches for illuminant direction estimation, presented two improved approaches for illuminant direction estimation: improved Pentland s approach and approach of weighted mean.

Effects of light and aeration on competition between Microcystis aeruginosa and Scenedesmus quadricauda and phosphorus release at the water-sediment interface;

Effect of lights on the metmyoglobin reduction activity and color stability during chilled pork storage;

Circadian rhythms and light responses of clock gene and arylalkylamine N-acetyltransferase gene expressions in the pineal gland of rats;

Effects of temperature and irradiance on growth of two strains of marine diatoms;

Effect of irradiance and phosphate on growth of nanophytoplankton and picophytoplankton;

Effect of Temperature,Irradiance and Population Interaction on the Growth of Phytoplankton of East China Sea;

Effects of salinity, temperature and light intensity on the growth and toxin production of Phaeocystis globosa;

Effect of Light Intensity、Temperature、Carbon Source and Vaccination Density on the Growth of Nannochloris oculata;

Effect of light intensity on the growth of cinnamomum pauciflorum seedlings;

Effect of illumination on removal efficiency of nitrogen and phosphorus in immobilized algal-bacterial reactor;

Effects of lead and illumination on black patina of zinc plating;

Study on Marginal Effect Caused by Illumination through the Difference between the Marginal Plants of South and North Maize Fields;