“联轴器强度计算”教学实践

联轴器强度计算是知识前后贯通的综合练习。通过联轴器的强度计算，综合运用所学的剪切、挤压、扭转等知识，全面分析、计算联轴器的强度问题，使学生初步掌握合理设计的方法，提高学生的综合分析、解决问题的能力。     

树木物候簇群分析方法的应用研究

依据树木物候多个形态学特征的综合性质,应用数学分析模型对不同树木的物候期进行多元的数量化分类处理,找出树种生态物候类群间相似相异的亲缘关系,并从生态型学的角度划分出相应的树木生态对策物候表现型.     

Numerical Study of FLow and Heat Transfer in Rectangular CHannel with Dimpled SUrface

This authors uses a physical model of the rectangular channel with dimpled surface to simulate the flow and heat transfer situation. On the basis of actual flow and heat transfer in the channel, it made the interrelated hypothesizes and built up the math model. They adopted the turbulent model, appliy the algorithm to resolve the pressure-velocity coupling and use the experimental data model to check up the feasibility of the model. By the study, the thesis shows the principle of the flow and heat transfer in narrow channel with a dimple surface and gets the factors and the conditions that affect the flow and heat transfer. The results show that the geometry structure and rank distributing of dimple affect the capability of heat transfer evidently. When Reynolds number is low, the capability of heat transfer becomes better as the number increases, and when Reynolds number is bigger than a critical point, there is a little influence.     

基于FANS的温室风机通风性能测试

试验采用Fans assessment numeration system(FANS)为现场监测系统,利用位置上下移动持续运行的螺旋桨风速计和静压传感器对风机通风性能进行测试。试验共测定3个玻璃温室内3种类型共9个排风风机在不同工况下静压5.0~61.5 Pa范围内的通风量和能源消耗。结果显示,风机防护网的存在及清洁状况对通风量的影响低于5%;塑料百叶窗风机比相同配置的铝制百叶窗风机通风量和能效分别平均高13.1%、15.1%;参数完全相同的风机能效差异最高达12.7%;胶带驱动的风机转速减少16.1%时通风量平均降低38.7%;温室内静压超过30 Pa时风机能耗显著增加。