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ON THE EXISTENCE OF INVARIANT TORI IN NON-CONSERVATIVE DYNAMICAL SYSTEMS WITH DEGENERACY AND FINITE DIFFERENTIABILITY 期刊论文 OAI收割
DISCRETE AND CONTINUOUS DYNAMICAL SYSTEMS, 2019, 卷号: 39, 期号: 7, 页码: 4225-4257
作者: Li, Xuemei; Shang, Zaijiu

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收藏 | 浏览/下载：36/0 | 提交时间：2020/01/10

Invariant torus small frequency degeneracy finite differentiability

Learning joint space–time–frequency features for EEG decoding on small labeled data 期刊论文 OAI收割
Neural Networks, 2019, 卷号: 114, 页码: 67-77
作者: Feng XS(封锡盛)

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收藏 | 浏览/下载：124/0 | 提交时间：2019/04/13

Brain-computer interfaces Convolutional neural network Joint space–time–frequency feature learning Subject-to-subject weight transfer Small labeled data

Design of an acoustic target classification system based on small-aperture microphone array 期刊论文 iSwitch采集
Ieee transactions on instrumentation and measurement, 2015, 卷号: 64, 期号: 7, 页码: 2035-2043
作者: Huang, Jingchang; Zhang, Xin; Guo, Feng; Zhou, Qianwei; Liu, Huawei

收藏 | 浏览/下载：29/0 | 提交时间：2019/05/10

Acoustic classification system Gaussian mixture model Mel-frequency cepstrum coefficients Microelectromechanical systems Noise Small-aperture array

Laser cleaning of neutral attenuator plate based on low power laser diode (EI CONFERENCE) 会议论文 OAI收割
2nd International Conference on Energy, Environment and Sustainable Development, EESD 2012, October 12, 2012 - October 14, 2012, Jilin, China
作者: Chen Y.; Li L.

收藏 | 浏览/下载：31/0 | 提交时间：2013/03/25

Laser cleaning is a non-contact green and environmental cleaning method which can effectively remove particulate contaminations of sizes as small as 0.1 m without damage to the optics. But most laser cleaning devices are large and heavy also expensive due to using large lasers such as CO2 laser YAG Laser etc. In this work a low power LD was tried to clean fingerprint and dust contaminated on the surface of the attenuator glasses plates. In the laser cleaning experiment with low power diode the fingerprint grease can be efficient to be cleaned but there is no evident effect for cleaning inorganic dust. The cleaning different degree of fingerprint contaminations was investigated at the variable laser parameters including laser power and irradiation time. An optical microscope was used to analyze the cleaning effect. The results show that low power LD can effectively remove the fingerprint on the surface of absorptive-type attenuator glass plates. On the premise that the attenuator optics glasses are not damaged the cleaning area increases with the increase of radiation time and laser power. The cleaning area doesn't change much with the variation of laser frequency when the other parameters are the same. (2013) Trans Tech Publications Switzerland.

Structural design for lightweight off-axis TMA space telescope (EI CONFERENCE) 会议论文 OAI收割
2011 2nd International Conference on Digital Manufacturing and Automation, ICDMA 2011, August 5, 2011 - August 7, 2011, Zhangjiajie, Hunan, China
作者: Li Z.; Li Z.

收藏 | 浏览/下载：36/0 | 提交时间：2013/03/25

A kind of small space telescope with 1m focal length was designed. By adopting finite element analysis technique the structure of the space telescope was analyzed. The analysis results indicate that the surface profile accuracy of the mirrors reach to RMS 8.0nm with the working circumstances 4C uniform temperature change and space micro-gravity the base frequency of the structure was 115 Hz. It shows that the designed structure has sufficiently high dynamic and static stiffness and thermal dimensional stabiLity. This space optical telescope is very suitable for little satellite application. 2011 IEEE.

Dynamics Scenarios of Dual-Beam Optically Injected Semiconductor Lasers 期刊论文 OAI收割
ieee journal of quantum electronics, 2011, 卷号: 47, 期号: 6, 页码: 762-769
Qi XQ; Liu JM

收藏 | 浏览/下载：76/4 | 提交时间：2011/07/05

Dual-beam injection optical injection period-one state radio over fiber semiconductor laser dynamics SMALL-SIGNAL ANALYSIS FREQUENCY-CONVERSION LIGHT INJECTION SUBJECT MODULATION BANDWIDTH LOCKING OSCILLATION AM

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：32/0 | 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

Modulation transfer function in seeker camera limits resulting from missile flutter caused by aerodynamic force (EI CONFERENCE) 会议论文 OAI收割
2010 2nd International Conference on Industrial Mechatronics and Automation, ICIMA 2010, May 30, 2010 - May 31, 2010, Wuhan, China
作者: Zhang X.; Zhang X.; Zhang X.

收藏 | 浏览/下载：26/0 | 提交时间：2013/03/25

The imaging quality of seeker in flight mode has been evaluated through analyzing the effects of missile flutter on optical modulation transfer function (MTF) of the optical system. Firstly the data of transverse vibration has been processed to eliminate the trend term caused by the trajectory then obtained the displacement with two times trapezoidal integration. For the side rotation the high frequency noise interference in the data has been filtered by using five-point moving average method. Took this model as the quivering rule between the object and the image and then analyzed the effects of the transverse vibration and the side rotation on imaging quality through MTF. By calculation the r.m.s value of the image motion caused by missile transverse vibration is 0.026mm and the side rotation angle is 0.0044 . Through the establishment of two modulation transfer functions (MTF) of image random vibration and linear vibration the results show that the image quality had declined and the effect of transverse vibration on image quality is obvious. Through improving the rigidity of the missile and selection of small focal length optical system and shorten the time of exposure can improve the imaging quality of the seeker. 2010 IEEE.

Modelling a small-size unmanned helicopter using optimal estimation in the frequency domain 期刊论文 OAI收割
Intelligent Systems Technologies and Applications, 2010, 卷号: 8, 期号: 1-4, 页码: 70-85
作者: Song DL(宋大雷); Qi JT(齐俊桐)

收藏 | 浏览/下载：14/0 | 提交时间：2012/05/29

small-size unmanned helicopter helicopter model optimal estimation hover frequency domain

Frequency-Pushing Effect in Single-Mode Diode Laser Subject to External Dual-Beam Injection 期刊论文 OAI收割
ieee journal of quantum electronics, 2010, 卷号: 46, 期号: 5, 页码: 796-803
作者: Wang LX; Ke JH

收藏 | 浏览/下载：84/6 | 提交时间：2011/07/05

Dual lasers four-wave mixing frequency-pushing effect injection-locked diode laser optical frequency conversion SMALL-SIGNAL ANALYSIS CAVITY SEMICONDUCTOR-LASERS OPTICAL-INJECTION NONLINEAR DYNAMICS LIGHT INJECTION CONVERSION LOCKING MODULATION BANDWIDTH FEEDBACK