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	Study on Acoustic Characteristics of Environmental Noise in Low Pressure Enclosed Spaces 会议论文 OAI收割 Dalian, China, 2023-09-23 作者: Li, Biao; Zhang, Haifeng; Qiao, Tiezhu; Li, Jingxia; Fang, Yao \| 收藏 \| 浏览/下载：10/0 \| 提交时间：2024/04/08 Low atmospheric pressure Sound pressure level Pitch frequency 1/3rd octave
	Orthogonal experiment and analysis of power spectral density on process parameters of pitch tool polishing 期刊论文 OAI收割 OPTICAL REVIEW, 2017, 卷号: 24, 期号: 1, 页码: 1-10 作者: Meng, Kai; Wan, Yongjian; Wu, Fan; Shen, Lijun; Wu, Hsing-Yu \| 收藏 \| 浏览/下载：31/0 \| 提交时间：2018/11/20 Pitch tool polishing Orthogonal experiment Power spectral density Spatial frequency error
	Lattice Boltzmann Simulations of a pitch-up and pitch-down maneuver of a span-wise flexible wing in a free stream flow Read More: http://arc.aiaa.org/doi/abs/10.2514/6.2012-300 会议论文 OAI收割 50th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition, Nashville, TN, United states, JAN 09-12, 2012 作者: Qi DW; He GW(何国威); Liu YM 收藏 \| 浏览/下载：60/0 \| 提交时间：2013/02/26 Aerospace engineering Deformation Exhibitions Flexible wings Reynolds number Rigidity Vortex flow Aerodynamic forces Chord-based Reynolds number Flexural rigidities Free stream Free-stream flow Lattice boltzmann Leading-edge vortices Lift coefficient Lift force Particle methods Pitch rate Power efficiency Reduced frequency Three dimensional space Time-periods Tip edge Trailing edges Trailing vortex
	Autocollimation form dual-frequency laser diffraction grating interferometer design and analysis (EI CONFERENCE) 会议论文 OAI收割 2010 International Conference on Computer, Mechatronics, Control and Electronic Engineering, CMCE 2010, August 24, 2010 - August 26, 2010, Changchun, China Wang C.-G. 收藏 \| 浏览/下载：40/0 \| 提交时间：2013/03/25 Propose a new measurement system of autocollimation form laser grating heterodyne interferometer. Take grating diffraction and polarization optics as theoretical foundation second furthermore combined with electronics knowledge to analyze the system. First make use of autocollimation diffraction of grating measurement information obtained by dual-frequency laser belongs to ac signal the interferometer measurement system take grating pitch as measuring datum the structure is simple possess great gain and high signal-noise ratio therefore stable completely overcome the disadvantages of DC level drift caused by light intensity variation of single-frequency laser system can achieve nanometer resolution. 2010 IEEE. reduce the impact of environmental factors easy to install and debug measurement error is small
	Characteristics of ZnMgO-based metal-semiconductor-metal photodetectors (EI CONFERENCE) 会议论文 OAI收割 International Symposium on Photoelectronic Detection and Imaging, ISPDI 2007: Photoelectronic Imaging and Detection, September 9, 2007 - September 12, 2007, Beijing, China 作者: Zhang J.; Li B.; Li B.; Li B.; Zhao Y. 收藏 \| 浏览/下载：25/0 \| 提交时间：2013/03/25 In recent years ZnMgO semiconductor alloys with a direct bandgap tunable between 3.37 eV and 7.8 eV become one of the most suitable materials for the fabrication of ultraviolet detectors. In this paper we have fabricated metal-semiconductor-metal photodetectors on 1-m thick Zn 0.8Mg0.2O films. The interdigital metal electrodes are 500 m long and 5 m wide with an interelectrode spacing 2 m 5 m and 10 m respectively. Zn0.8Mg0.2O films were grown on quartz by ratio frequency magnetron sputtering at 500C. Dark current spectral responsivity and pulse response were carried out for the devices with different finger pitches. All the photodetectors showed the peak responsivity at 330 nm and the ultraviolet-visible rejection ratio (R330 nm/R400 nm) is more than four orders of magnitude at 3 V bias. For the device with 2 m finger pitch the detectivity was calculated as 4.21011 cm Hz 1/2/W at 330 nm. Furthermore the transient response measurement for all devices revealed similar rise time of 10 ns. The 90%-10% fall times are 130 ns 170 ns and 230 ns for the devices with different finger pitches of 2 m 5 m and 10 m respectively..