Physical anti-collision in RFID systems：theory and practice physical anti-collision in rfid systems Physical activity promotion of adolescents: theory and practice China real estate index system theory and practice National innovation ecosystem: theory and practice Physical anti-collision in RFID systems 并列题名：Physical activity promotion of adolescents: theory and practice Fiscal policy in China：theory and practice 并列题名：National innovation ecosystem: theory and practice Information systems theory and practice