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Chinese Academy of Sciences Institutional Repositories Grid
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Uniqueness and Direct Imaging Method for Inverse Scattering by Locally Rough Surfaces with Phaseless Near-Field Data 期刊论文  OAI收割
SIAM JOURNAL ON IMAGING SCIENCES, 2019, 卷号: 12, 期号: 1, 页码: 119-152
作者:  
Xu, Xiaoxu;  Zhang, Bo;  Zhang, Haiwen
  |  收藏  |  浏览/下载:59/0  |  提交时间:2020/01/10
Improvement on algae and turbidity removal in an integrated flotation and sedimentation unit using side flow-inclined plate settlers: evidence from a full-scale field experiment 期刊论文  OAI收割
JOURNAL OF WATER SUPPLY RESEARCH AND TECHNOLOGY-AQUA, 2018, 卷号: 67, 期号: 1, 页码: 84-98
作者:  
Chai, Xin;  Zhang, Ruijian;  Sun, Zhimin;  Cui, Bin;  Ren, Pengfei
  |  收藏  |  浏览/下载:82/0  |  提交时间:2019/06/17
Improvement on algae and turbidity removal in an integrated flotation and sedimentation unit using side flow-inclined plate settlers evidence from a full-scale field experiment 期刊论文  OAI收割
JOURNAL OF WATER SUPPLY RESEARCH AND TECHNOLOGY-AQUA, 2018, 卷号: 67, 期号: 1, 页码: 84-98
作者:  
Zhang, Ruijian;  Sun, Zhimin;  Cui, Bin;  Ren, Pengfei;  Du, Zhili
  |  收藏  |  浏览/下载:71/0  |  提交时间:2019/06/18
Algorithm research of target acquisition for TV tracking system based on Sliding Mode Control (EI CONFERENCE) 会议论文  OAI收割
2010 3rd International Conference on Advanced Computer Theory and Engineering, ICACTE 2010, August 20, 2010 - August 22, 2010, Chengdu, China
Wu P.; Gao H.-B.
收藏  |  浏览/下载:27/0  |  提交时间:2013/03/25
Target acquisition algorithm based on Sliding Mode Control (SMC) is proposed for TV tracking system. Target acquisition capability and performance are both improved  attributing to overcoming the deficiencies of traditional linear control. In this paper  sliding surface with variable coefficient and continuous control law without switching is introduced in the SMC controller design. The improved SMC shows better performance compared to basic SMC  and full-field acquisition with rapid response and non-overshoot is achieved. The simulation of acquisition shows that  the system can acquire a target passing through the view field of 1.53 in the width with an uniform speed of 15 /s  while the whole process is in a short settling time and chattering-free  and the reaching segment has no overshoot. 2010 IEEE.  
A high-speed acquisition and processing system of the laser speckle signal on the magnetic fluid (EI CONFERENCE) 会议论文  OAI收割
International Symposium on Photoelectronic Detection and Imaging 2009: Laser Sensing and Imaging, June 17, 2009 - June 19, 2009, Beijing, China
作者:  
Sun Y.;  Sun Y.;  Wan Q.-H.
收藏  |  浏览/下载:27/0  |  提交时间:2013/03/25
In order to achieve the dynamical detection and real-time analysis of the movement status of the magnetic fluid  according to the difficulties of the detection of the magnetic fluid  established a high-speed acquisition and processing system of laser speckle signal on the magnetic fluid. First of all  the FPGA (EP2C8T144C8N) drived the linear array CCD(TCD1501D) to scan in the corresponding time sequence given by the computer  collected the laser speckle interferometric image in rapid change on the surface of the magnetic fluid  which followed the movement of the magnetic fluid  and the signal collected by CCD was converted into the digital data through the high-speed A/D convertor and stored into the internal buffer FIFO of the FPGA  whose width and depth were designed by the user as required. Then  the FPGA sent the digital signal of the laser speckle interferometric images into the computer through the USB2.0 highspeed differential bus  whose transmission rate can reach 480Mb/s in theory. Finally  the distribution of the laser speckle on the magnetic fluid was messy and random  which carried certain information about the surface of the magnetic fluid  based on the theories of the statistic correlation and the subdivision of images  analysing and processing the laser speckle interferometric images  indirectly got the movement status of the magnetic fluid under the electromagnetic field. The experimental results show that: the High Speed Acquisition and Processing System has the advantage of full-court  non-contact  non-invasive  high-precision and high reliability and so on. The detection resolution of high speed acquisition and processing system is superior to 1m and the sample rate is 3Msps  which basically meets the requirements of the magnetic fluid movement state detection. 2009 SPIE.  
Compressive behavior of 64% porosity NiTi alloy: An experimental study 期刊论文  OAI收割
Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing, 2009, 卷号: 515, 期号: 1-2, 页码: 117-130
Z. Q. Guo; H. Xie; F. L. Dai; H. C. Qiang; L. J. Rong; P. W. Chen; F. L. Huang
收藏  |  浏览/下载:29/0  |  提交时间:2012/04/13
High-power InGaAs/GaAs VCSEL's two-dimension arrays (EI CONFERENCE) 会议论文  OAI收割
ICO20: Lasers and Laser Technologies, August 21, 2005 - August 26, 2005, Changchun, China
作者:  
Liu Y.;  Wang L.-J.;  Wang L.-J.;  Liu Y.;  Liu Y.
收藏  |  浏览/下载:26/0  |  提交时间:2013/03/25
Selectively oxidized InGaAs/GaAs vertical -cavity surface-emitting lasers (VCSEL) array at an emission wavelength of 980nm was reported. A 16 elements array with 200m aperture size (250m center spacing) of individual elements shows a CW output power of 1.21 W at room temperature  resulting in 1 KW/cm2 average optical power density. The device threshold current is 1.32A The lasing peak wavelength is 981.9 nm  the full width at half-maximum is 0.7 nm  and the far-field divergence angle is about 17.The characteristics of a single device with a active region diameter of 800m is compared with that of a 2-D array with active region diameter of individual clement of 200m. These two kinds of devices have the same total lasing area. At the same current injection  the single device has a higher threshold and a higher output power than the array. The red shift of single device is more obvious than that of the array's.