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In recent years, in addition to traditional noise reduction measures targeting aircraft engine and airframe noise sources, increasing attention has been paid to engine–airframe installation noise control and noise abatement flight procedure technologies. In terms of installation noise control, this paper provides an overview of the generation mechanisms, influencing factors, and control techniques for jet and fan installation noise, as well as the application of computational aeroacoustics methods in noise mechanism analysis and prediction. For noise abatement procedures, the principles, applicable conditions, and effectiveness of standard departure procedures NADP 1/2 (Noise Abatement Departure Procedure), continuous climb/descent operations, and derated takeoff are introduced. The integration of performance−based navigation and multi−objective optimization is highlighted as a promising approach to achieving the coordinated optimization of noise reduction and flight performance. This paper systematically reviews the progress and development trends of these two key noise reduction approaches, aiming to contribute to the realization of the "Quiet China" initiative.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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