STUDY ON THE EFFECTIVE TREATING PERIOD FOR POLLEN CHROMOSOME DOUBLING OF POPULUS TOMENTOSA×P.BOLLEANA Study on influencing factors of valid patents of compound traditional Chinese medicines for cardiovascular and cerebrovascular diseases on base of regression analysis A Study on Identification of Yi Nationaiity‘s Secret Recipe for Treating Snakebites Effects of Wood Dyeing with Microwave Processing Mechanism of "treating heart and brain with same methods" based on data science Studies on Year-cycle Changes of Leaf Nutrient Status from Camphor Tree Studies on Year-cycle Changes of Leaf Nutrient Status from Camphor Tree