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| 1 | 缩比发动机喷嘴热喷流噪声试验显示文摘为深入了解涡扇发动机喷流噪声特性,验证喷流噪声降噪方法,建立发动机喷流噪声数据库,在法国国家航天航空研究中心的CEPRA19声学风洞开展了缩比发动机喷嘴热喷流噪声试验测试工作。针对发动机热喷流模拟系统,设计加工了面积比(外涵喷嘴面积与内涵喷嘴面积之比)为5和7的两种喷嘴构型试验模型。通过减小高温区域单个零件长度尺寸和零件壁厚的方法,降低热膨胀对模型尺寸的影响。在声学风洞中完成了不同工况条件下两种面积比圆形喷嘴和锯齿形喷嘴的远场噪声特性测试。通过对远场测量噪声频谱进行分析,发现随着来流速度的增大喷流噪声会减小,采用锯齿形喷嘴设计在中低频喷流噪声水平降低,在高频噪声水平有所增加。 | 张颖哲 倪大明 Incheol LEE 林大楷 杨志刚 | 2018 | 航空学报2018，39，12： | 3 |
| 2 | 基于模态发生器的进气道风扇噪声及声衬降噪实验显示文摘为研究发动机进气道风扇噪声特性及声衬降噪效果,使用模态发生器提供声源,采用固定麦克风阵列和旋转扫描耙装置测量进气道内噪声信号,进而利用周向和径向模态分解方法得到声模态幅值,对影响模态分解结果的关键因素进行了研究。对周向模态在时域内进行分解,得到幅值和相位的时变特性。最后完成了2套声衬实验件降噪效果测试。结果表明:模态发生器提供的声源可获得风扇噪声的主要模态特征,包括模态幅值、旋转角速度等;满足采样定理条件,径向模态n=0情况下模态发生器产生的主模态和扬声器数量无关;使用旋转扫描耙装置测量声模态,旋转扫描耙的采样位置数对测量结果影响可忽略;在设计频率下,声衬降噪效果良好。模态发生器提供的进气道风扇噪声源可用于对声衬设计方法进一步实验验证。 | 张涛 林大楷 张颖哲 LEE Incheol | 2021 | 航空动力学报2021，36，2： | 2 |
| 3 | Deep-learning-based gas identification by timevariant illumination of a single micro-LEDembedded gas sensor显示文摘Electronic nose(e-nose)technology for selectively identifying a target gas through chemoresistive sensors has gained much attention for various applications,such as smart factory and personal health monitoring.To overcome the crossreactivity problem of chemoresistive sensors to various gas species,herein,we propose a novel sensing strategy based on a single micro-LED(μLED)-embedded photoactivated(μLP)gas sensor,utilizing the time-variant illumination for identifying the species and concentrations of various target gases.A fast-changing pseudorandom voltage input is applied to the μLED to generate forced transient sensor responses.A deep neural network is employed to analyze the obtained complex transient signals for gas detection and concentration estimation.The proposed sensor system achieves high classification(~96.99%)and quantification(mean absolute percentage error~31.99%)accuracies for various toxic gases(methanol,ethanol,acetone,and nitrogen dioxide)with a single gas sensor consuming 0.53 mW.The proposed method may significantly improve the efficiency of e-nose technology in terms of cost,space,and power consumption. | Incheol Cho Kichul Lee Young Chul Sim Jae-Seok Jeong Minkyu Cho Heechan Jung Mingu Kang Yong-Hoon Cho Seung Chul Ha Kuk-Jin Yoon Inkyu Park | 2023 | Light(Science & Applications)2023，12，5： | 1 |
| 4 | Character- istics of auto - ignition and micro - explosion behavior of a single droplet of water - in - fuel 显示文摘 | Incheol Jeong Kynug - Hwan Lee Jaesoo Kim | 2008 | Journal of Mechanical Science and Technology2008，22，1： | 1 |
| 5 | Involvement of mixed function oxidase systems in polychlorinated biphenyl metabolism by plant cells显示文摘 | Incheol Lee John S. Fletcher | 1992 | Plant Cell Reports1992，，2： | 1 |
| 6 | Characteristics of auto-ignition and micro-explosion behavior of a single droplet of water-in-fuel显示文摘 | Incheol Jeong Kyung-Hwan Lee Jaesoo Kim | 2008 | Journal of Mechanical Science and Technology2008，22，1： | 1 |
| 7 | Photocatalytie oxidation of microcystin-LR in fluidized bed reactor having TiO2- coated activated carbon 显示文摘 | Lee Dongkeun Kim Sungchul Cho Incheol | 2004 | Separation and Purification Technol- ogy2004，34，： | 1 |
| 8 | A model-scale test on noise from single-stream nozzle exhaust geometries in static conditions显示文摘A model-scale test with single-stream nozzle exhaust geometries was carried out at the anechoic chamber of Beihang University in Beijing, China. The spectral characteristics are investigated, and the effects of the following parametric variations are reported in this paper: impact of nozzle operating conditions on spectra; impact of the presence of a plug; and effectiveness of chevron configurations for noise mitigation. The measurement shows that the change of pressure values has more impact on spectra than the change of temperature values. The spectral change due to pressure is shown at all band numbers for unheated conditions whereas it is more pronounced at highfrequency ranges for heated conditions. An impact of the presence of a plug is also clearly observed.The reduction of noise is moderate up to band number of 35, and becomes more significant at higher band numbers. It is observed that chevron nozzles are more efficient at high pressure and temperature values. It is expected that the quantified analysis will be used to develop an empirical model of single jet noise, which will be the baseline for the development of prediction of noise from turbofan engines of high bypass ratios. | Incheol LEE Yingzhe ZHANG Dakai LIN | 2018 | Chinese Journal of Aeronautics2018，31，12： | 0 |
| 9 | Risk factors for computed tomography interpretation discrepancy in emergently transferred patients显示文摘Radiologic imaging is a diagnostic tool that greatly affects patient outcomes,[1]and with the recent development of imaging technology,advanced imaging tests such as computed tomography(CT)have gained widespread accessibility in hospitals.In particular,CT is essential in the evaluation of patients in low-level emergency departments(EDs)because of its ability to answer clinical questions accurately and quickly.[2] | Hyun Sim Lee Jinwoo Myung Min Ji Choi Hye Jung Shin Incheol Park Sung Phil Chung Ji Hoon Kim | 2022 | World Journal of Emergency Medicine2022，13，1： | 0 |
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