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Articles by MA Ming
Total Records ( 2 ) for MA Ming
  Zhang Qing , Yang Lei , Zhao Hang , Miao Qian , Yang Rongchao , Ma Ming and Dong Fuwen
  Most modern tobacco industries have chambers to evaluate the quality of tobacco samples. In the academe, this chamber should also produce a low pressure likely to the atmospheric pressure in high altitude area. A ventilation system should be used in the chamber to controlling the tobacco smoke. This study aims at the air flow distribution of a ventilation system of the chamber with the low pressure and assessing its controlling effect on tobacco smoke. Computational Fluid Dynamic method is applied for the simulation of air flow field and smoke moving path in a condition of low pressure in the chamber. Furthermore, a distance-data acquisition system is set up in the camber to monitor the air velocities of six particular positions close to inlets or outlets. The numerical simulating results in this study can show us the effect of the air flow distribution and air flow velocity in the chamber, which can be proved validity by the results from the distance-data acquisition system. In this case, the locations of the inlets and outlets of ventilation system may be the key factor in the design of the ventilation system. It can be also concluded that the better air flow distribution may decrease the turbulent circuit and reduce the dust deposit in the corners of the chamber.
  MEI Yu , MA Ming , HU Bao-wen , Dusan Brinkhuizen and Tamas Szekely
  The nest-site selection of White-crowned Penduline Tit Remiz coronatus in Northern Xinjiang was studied from April to July in 2008. It has special nesting behavior. The nest has a pocket pouch size, with a delicate structure. Research of the nest, using the method of total area investigation, included searching for nests carefully, combined with tag plotting method, and drawing the nest distribution map. In total 125 nests were found in the field, nesting on willow, poplar, birch and other hardwood trees near lakes and rivers. 68.80% of nest trees were willows Salix spp. The average height of nests was 5.3±2.5 m. The nests were located in the lower part of arbor (about 1/3), about 70% of nests less than 30 meters from river. Study of the nest-site selection, used a quadrate survey to investigate the parameters of nest-site characteristics. The principal component analysis indicated that there were four factors affecting the nest-site selection of the White-crowned Penduline Tit. They were: 1. canopy (including diameter of nest tree and canopy cover above nest), 2. nest tree species (including species of nest tree and arbor, height of nest tree and nest in the tree), 3. position or site (including distance to river and nest orientation ), 4. food and nest material (including canopy cover under nest).
 
 
 
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