Since ancient times, China has been a major agricultural country and is now the world's top food producer. With second largest population in world, it of great relevance to investigate factors influencing grain production. In this paper, we look at main that affect yield. A simple multiple linear regression analysis was used develop model with fertiliser application, sown area, flooded farm mac...

objective: the purpose of this research was to investigate the role of the media, perfectionism, and difficulties in emotion regulation in prediction of muscle dysmorphia symptoms.  methods: in this research, 240 male body-builders were selected from five gyms in gorgan (north of iran). they were required to answer muscle dysmorphia disorder inventory (mddi), multidimensional perfectionism scal...

Aiming at the unreasonable problem of current football tactical analysis, this paper studies application method multiple regression in analysis. Build a rehearsal model, optimize player information and analysis management functions, analyze status. Using to choose appropriate position players, make attack defense plan. At same time, tactics can better select optimal plan, ensure rationality sel...