The mechanism and methods of viscosity drag reduction are briefly discussed. Some of its applications for saving energy and materials, improving efficiency or reducing noise and vibration are given.
本文综述了几种粘性减阻方法及其减阻的机理，联系了其在水相、油相中节约能源、材料，提高速度和效率等方面的应用。
Presents the design methods of air conditioning water system, air distribution of rendition hall, air exhaust system, noise reduction, vibration isolation and automatic control.
分析了该音乐厅空调负荷的特点及其计算过程，介绍了空调水系统、演奏大厅气流组织、排风系统、空调系统消声和减振、空调自控的设计方法。
The present nonlinear model reduction methods unfit for nonlinear benchmark buildings as their vibration equations belong to non-affine system.
非线性 基准建筑物的振动方程属于非仿射 系统，目前的非线性模型降阶方法不能采用。
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