中国科学院机构知识库网格系统: 检索

Control of a 3-RRR Planar Parallel Robot Using Fractional Order PID Controller 期刊论文 OAI收割
International Journal of Automation and Computing, 2020, 卷号: 17, 期号: 6, 页码: 822-836
作者: Auday Al-Mayyahi; Ammar A. Aldair; Chris Chatwin

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收藏 | 浏览/下载：24/0 | 提交时间：2021/02/22

3-RRR planar parallel robot Cayley-Menger determinants inverse kinematic model bilateration fraction order proportional integral derivate (PID) controller bat optimization algorithm.

Blind deblurring from single motion image based on adaptive weighted total variation algorithm 期刊论文 OAI收割
IET SIGNAL PROCESSING, 2016, 卷号: 10, 期号: 6, 页码: 611-618
Wen, J; Zhao, JS; Cailing, W; Yan, SX; Wang, W

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收藏 | 浏览/下载：27/0 | 提交时间：2016/12/09

image restoration image motion analysis inverse problems blind image deblurring method adaptive weighted total variation algorithm single motion image structure blur kernel estimation point spread function ringing artefact removal higher-order partial derivative ill-posed inverse problem latent image restoration

Improved method of target detection on optoelectronic hybrid joint transform correlator in cluttered scences (EI CONFERENCE) 会议论文 OAI收割
2011 3rd International Conference on Mechanical and Electronics Engineering, ICMEE 2011, September 23, 2011 - September 25, 2011, Hefei, China
作者: Yang L.; Yang L.

收藏 | 浏览/下载：22/0 | 提交时间：2013/03/25

A classical joint transform correlator (JTC) usually yields large correlation sidelobes as well as a large correlation peak width strong zero-order peak and low diffraction efficiency which make the detection ability of JTC lower. To overcome these difficulties firstly a joint power spectrum (JPS) subtraction technique in Fourier plane was proposed where reference image power spectrum and object image power spectrum are subtracted from the JPS before inverse Fourier-transform operation it is obvious that the modified JPS removes the zero-order term. Secondly a fringe-adjusted filter (FAF) was presented to suppress sidelobes and noises. The modified JPS is multiplied by a FAF before the inverse Fourier-transform operation to obtain the cross-correlation peak. Computer simulations demonstrated the improved method can obviously remove zero-order diffraction and effectively suppress the sidelobes and noises compared with classic JTC and then improve the detection ability for JTC. Experimental results presented the sharp correlation peak and also confirmed the method effectiveness. (2012) Trans Tech Publications Switzerland.

生物自发荧光三维断层成像方法研究 学位论文 OAI收割
工学博士, 中国科学院自动化研究所: 中国科学院研究生院, 2011
作者: 刘凯

收藏 | 浏览/下载：94/0 | 提交时间：2015/09/02

分子影像光学成像生物自发荧光断层成像前向数理模型重建算法逆问题高阶近似模型多模态融合 molecular imaging optical imaging bioluminescence tomography forward math-physical model reconstruction algorithm inverse problem higher-order approximation model multimodality fusion

Multi-focus image fusion algorithm based on adaptive PCNN and wavelet transform (EI CONFERENCE) 会议论文 OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Advances in Imaging Detectors and Applications, May 24, 2011 - May 26, 2011, Beijing, China
Wu Z.-G.; Wang M.-J.; Han G.-L.

收藏 | 浏览/下载：78/0 | 提交时间：2013/03/25

Being an efficient method of information fusion image fusion has been used in many fields such as machine vision medical diagnosis military applications and remote sensing.In this paper Pulse Coupled Neural Network (PCNN) is introduced in this research field for its interesting properties in image processing including segmentation target recognition et al. and a novel algorithm based on PCNN and Wavelet Transform for Multi-focus image fusion is proposed. First the two original images are decomposed by wavelet transform. Then based on the PCNN a fusion rule in the Wavelet domain is given. This algorithm uses the wavelet coefficient in each frequency domain as the linking strength so that its value can be chosen adaptively. Wavelet coefficients map to the range of image gray-scale. The output threshold function attenuates to minimum gray over time. Then all pixels of image get the ignition. So the output of PCNN in each iteration time is ignition wavelet coefficients of threshold strength in different time. At this moment the sequences of ignition of wavelet coefficients represent ignition timing of each neuron. The ignition timing of PCNN in each neuron is mapped to corresponding image gray-scale range which is a picture of ignition timing mapping. Then it can judge the targets in the neuron are obvious features or not obvious. The fusion coefficients are decided by the compare-selection operator with the firing time gradient maps and the fusion image is reconstructed by wavelet inverse transform. Furthermore by this algorithm the threshold adjusting constant is estimated by appointed iteration number. Furthermore In order to sufficient reflect order of the firing time the threshold adjusting constant is estimated by appointed iteration number. So after the iteration achieved each of the wavelet coefficient is activated. In order to verify the effectiveness of proposed rules the experiments upon Multi-focus image are done. Moreover comparative results of evaluating fusion quality are listed. The experimental results show that the method can effectively enhance the edge details and improve the spatial resolution of the image. 2011 SPIE.

Stability control of quad-rotor based on explicit model following with inverse model feedforward method (EI CONFERENCE) 会议论文 OAI收割
2011 IEEE International Conference on Mechatronics and Automation, ICMA 2011, August 7, 2011 - August 10, 2011, Beijing, China
Bai Y.; Gong X.; Hou Z.; Tian Y.

收藏 | 浏览/下载：22/0 | 提交时间：2013/03/25

The quad-rotor is expected to carry out many different tasks. It is hoped that the quad-rotor can have different characteristics according to the different mission requirements. For this reason a flight stability augmentation control system based on explicit model following with inverse model feedforward control method is proposed in this paper. This control system is composed of an explicit model an inverse model and a feedback controller module. In order to calculate an inverse model of the coupled multivariable aircraft system a feedback linearization loop is also applied to this control system. At last simulations are performed to show the effectiveness of the designed stability augmentation control system in the presence of external disturbance and model uncertainty. The influence of explicit model to the characteristics of quad-rotor is also indicated in a contrast simulation result. 2011 IEEE.

A method of estimating computational complexity based on input conditions for N-vehicle problem 期刊论文 OAI收割
ACTA MATHEMATICAE APPLICATAE SINICA-ENGLISH SERIES, 2010, 卷号: 26, 期号: 1, 页码: 1-12
作者: Xia, Xi; Cui, Jin-chuan

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收藏 | 浏览/下载：19/0 | 提交时间：2018/07/30

Complexity of computation combinatorial optimization N-vehicle problem permutations inverse order

A quasi-residuals method in sliced inverse regression 期刊论文 OAI收割
STATISTICS & PROBABILITY LETTERS, 2004, 卷号: 66, 期号: 2, 页码: 205-212
作者: Tian, MZ; Li, GY

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收藏 | 浏览/下载：18/0 | 提交时间：2018/07/30

quasi-residuals sliced inverse regression order statistics concomitant

Spectrum distribution of the sedond order generalized distributed parameter systems 期刊论文 OAI收割
APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION, 2003, 卷号: 24, 期号: 10, 页码: 1224-1232
作者:

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收藏 | 浏览/下载：18/0 | 提交时间：2018/07/30

second order generalized distributed parameter system spectrum distribution hilbert space generalized inverse one of bounded linear operatiors

EXACT SOLUTION FOR QUANTUM DAVEY-STEWARTSON-I SYSTEM 期刊论文 OAI收割
PHYSICAL REVIEW LETTERS, 1990, 卷号: 65, 期号: 26, 页码: 3227
PANG, GD; PU, FC; ZHAO, BH

收藏 | 浏览/下载：16/0 | 提交时间：2013/09/17

INVERSE SCATTERING EVOLUTION-EQUATIONS 1ST-ORDER SYSTEMS PLANE