The influence of corn plant spacing on mechanical harvesting was analyzed. Corn flexible model was established through the flexible body module of ADAMS by using virtual prototype. Mechanical dynamics simulation was performed. Plant spacing was suggested to a significant positive correlation on the efficiency of mechanical harvesting. During mechanical harvesting, weight loss is dependent on plant spacing. The optional range of corn plant spacing was between 0.15m and 0.2m according to the simulation results.

Abstract. The different ways of fresh air into the indoor, different forms of organization, will affect the indoor comfort. Meanwhile, it can affect the quality of indoor air. The test of the fresh air system mainly involves the indoor temperature and humidity with and without return air. Based on various air organization conditions, the best scheme is put forward. In this work, the influence of the air inlet location on the indoor air quality is studied, and the indoor thermal environment of the room is optimized under the condition of the fresh air supplied.

Abstract. To optimize and control the indoor air distribution and quality, theindoor temperature and humidity were measured based on indoor fresh air system.The one measurementwas indoor temperature and humidity in both cases of return air and without return air in winter respectively. The other was indoor temperature and humidity in both cases of return air and without return air in summer respectively. In additional,the test room environment was simulated using the finite element analysis software of ANSYS.Through setting a variety of air organization operating modes,the best solution of indoor air flow could be obtained.