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| 1 | Development of acoustic liner in aero engine: A review显示文摘Noise reduction for aircraft engine has attracted great concern due to the strict noise control regulation nowadays. Conventional perforated sheet-over-honeycomb acoustic liners have been widely used to attenuate turbofan engine noise. To dampen the broadband noise and resist the harsh service conditions with high temperature and pressure in modern turbofan engine,new acoustic liner concepts are proposed and evaluated in the latest decade. In this review,available studies regarding the recent development of liners are gathered. The paper starts with the introduction of acoustic absorption mechanism of local-reacting and extended-reacting liners. The progress of novel passive liners(e.g.,mesh-cap liner,variable-depth liner,metal foam liner,hybrid liner,etc.) is summarized. Furthermore,adaptive liners with tunable geometry dimension or bias flow are illustrated in details.Metamaterial is also mentioned as a hot candidate in the next generation of acoustic liners. Finally,this review identifies benefits and some technical challenges with the goal of unveiling the potential of novel acoustic liner technologies in aero engine. | MA XuQiang SU ZhengTao | 2020 | Science China(Technological Sciences)2020，63，12： | 5 |
| 2 | Monolithic homogeneous integrated miniaturized triboelectric nanogenerator with an inner air cavity for energy harvesting显示文摘To realize the high-efficiency acquisition of environmental mechanical energy,traditional triboelectric nanogenerators(TENGs)based on contact-separation consist of two separate triboelectric layers.Their large contact-separation gap increases the overall volume of the device,making it difficult to realize miniaturization and flexibility.This work,therefore,presents a fully enclosed all-in-one-shaped flexible TENG(FEAST)with an air cavity using rubber mixing and high-temperature vulcanization.The air pressure inside the enclosed air cavity facilitates effective contact-separation of the FEAST.The homogeneous integration between the triboelectric layer and the electrode layer enhances structural firmness without using extra spacer materials.The developed FEAST presents excellent mechanical durability even after 10000 cycles.By increasing the active contact area between the triboelectric materials,a maximum peak-peak output voltage,current,and power density of 130 V,1.1μA,and277 m W/m^(2),respectively,were obtained with an effective stress area of 1 cm2.Moreover,the fully enclosed structure ensures that the output performance is not affected by the external environment.The FEAST was fixed onto the sole of a shoe to demonstrate its applicability in harvesting mechanical energy from human motions.Overall,the developed method provides a simple approach for optimizing the structure of TENGs and is compatible with large-scale manufacturing. | HOU XiaoJuan ZHANG ShengNan YU JunBin YANG ChangJun ZHANG Ning HE Jian CHOU XiuJian | 2021 | Science China(Technological Sciences)2021，64，3： | 3 |
| 3 | 氟西汀联用氯米帕明治疗强迫症的临床研究显示文摘采用病例对照和自身对照的研究方法,对氟西汀联用氯米帕明与氟西汀单用治疗强迫症(OCD)的疗效及副作用进行8周的临床对照现察,以探讨难治性强迫症的治疗对策。结果显示联用组的疗效明显优于氟西汀单用组,副作用联用组略重于单用组,但无统计学差异。提示难治性强迫症可用氟西汀联用氯米帕明治疗。 | 刘绍梅 | 2000 | 山东精神医学2000，13，2： | 0 |
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