The impact of shrub coverage and height on surface wind and aerodynamic parameters is systematically studied through field study and fixed observation.
通过野外实地调查和定位观测，系统研究了灌木林盖度和高度对地表风况及空气动力学参数的影响。
Therefore, to research and perfect the theory study and calculating method of temperature field in concrete box-girder basing on long-term observation data is the purpose of this dissertation.
论文旨在混凝土公路箱梁桥温度场的长期观测数据基础上深入研究并完善公路桥梁混凝土箱梁温度场的理论与计算方法。
Adopting the method of case study out of field research, numerous first-hand and vivid materials were collected by on-the-spot observation and semi-structure interview.
采用实地研究中的个案调查方法，利用现场观察和半结构访谈收集了大量的第一手鲜活资料。
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