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浏览/检索结果: 共42条，第1-10条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择题名升序题名降序提交时间升序提交时间降序作者升序作者降序发表日期升序发表日期降序 Adaptive Fuzzy Asymptotic Tracking Control of State-Constrained High-Order Nonlinear Time-Delay Systems and Its Applications 期刊论文  OAI收割 IEEE TRANSACTIONS ON CYBERNETICS, 2022, 卷号: 52, 期号: 3, 页码: 1671-1680 作者:  Wu, You;  Xie, Xue-Jun;  Hou, Zeng-Guang   |  收藏  |  浏览/下载：32/0  |  提交时间：2022/07/25 Adaptive fuzzy asymptotic tracking control  feasibility conditions  full-state constraints  high-order nonlinear time-delay systems   The energy-preserving time high-order AVF compact finite difference scheme for nonlinear wave equations in two dimensions 期刊论文  OAI收割 APPLIED NUMERICAL MATHEMATICS, 2021, 卷号: 170, 页码: 298-320 作者:  Hou, Baohui;  Liang, Dong   |  收藏  |  浏览/下载：20/0  |  提交时间：2022/04/02 AVF method  CFD operator  Time high-order  Energy conservation  Convergence  Nonlinear wave equations   Theoretical exploration of harmonic emission and attosecond pulse generation from H-2(+) in the presence of terahertz pulse 期刊论文  OAI收割 MODERN PHYSICS LETTERS B, 2016, 卷号: 30, 期号: 17 作者:  Liu, Hang;  Feng, Liqiang   |  收藏  |  浏览/下载：20/0  |  提交时间：2019/06/20 High-order Harmonic Generation  Non-born-oppenheimer Time-dependent Schrodinger Equation  Attosecond Pulse  Terahertz Pulse   Time-Domain Numerical Solutions of Maxwell Interface Problems with Discontinuous Electromagnetic Waves 期刊论文  OAI收割 ADVANCES IN APPLIED MATHEMATICS AND MECHANICS, 2016, 卷号: 8, 期号: 3, 页码: 353-385 Zhang, Y; Nguyen, DD; Du, KW; Xu, J; Zhao, S   |  收藏  |  浏览/下载：34/0  |  提交时间：2016/12/09 Maxwell's equations  finite-difference time-domain (FDTD)  discontinuous Galerkin time-domain (DGTD)  transverse magnetic (TM) and transverse electric (TE) systems  high order interface treatments  matched interface and boundary (MIB)   Robust high-order space-time conservative schemes for solving conservation laws on hybrid meshes 期刊论文  OAI收割 JOURNAL OF COMPUTATIONAL PHYSICS, 2015, 卷号: 281, 页码: 375-402 作者:  Liu KX;  Shen H;  Shen, H (reprint author), Hong Kong Polytech Univ, Dept Mech Engn, Kowloon, Hong Kong, Peoples R China.;  Zhang DL(张德良);  Wen CY   |  收藏  |  浏览/下载：30/0  |  提交时间：2015/03/17 Space-time Conservation Element And Solution Element (Ce/se) Method  High-order Accuracy  Hybrid Meshes  Unstructured Meshes   High-order harmonic generation spectra and isolated attosecond pulse generation with a two-color time delayed pulse 期刊论文  OAI收割 journal of electron spectroscopy and related phenomena, 2012, 卷号: 185, 期号: 1-2, 页码: 39-46 作者:  Feng, Liqiang;  Chu, Tianshu 收藏  |  浏览/下载：18/0  |  提交时间：2013/10/11 High-order harmonic generation  Isolated attosecond pulse  Delay time effect  Two-color held   Color filtering method for CFA images based on gradient (EI CONFERENCE) 会议论文  OAI收割 International Conference on Communication Systems and Network Technologies, CSNT 2012, May 11, 2012 - May 13, 2012, Rajkot, Gujrat, India 作者:  Wang Y.;  Wang Y.;  Wang Y.;  Wang Y.;  Wang Y. 收藏  |  浏览/下载：32/0  |  提交时间：2013/03/25 Single-sensor digital cameras capture image by covering the sensor surface with a color filter array(CFA) such that each sensor pixel only samples one of three primary color values  three color is R(red)  G(green) and B(blue). To render a full-color image  need an interpolation process commonly referred to as CFA demosaicking  is required to estimate the other two contributions for producing a full-color image. But  the noise in imaging sensors not only corrupts the color filter array  at the same time introduces artifacts during the color interpolation step and influence quality of images. In order to acquire high quality full-color images  adopt a sort of viable and effective interpolation algorithm based on gradient  at the time of removing the noise  reserve image border and detail information clearly. 2012 IEEE.   Embedded image grabber and processing system based on camera link (EI CONFERENCE) 会议论文  OAI收割 2012 World Automation Congress, WAC 2012, June 24, 2012 - June 28, 2012, Puerto Vallarta, Mexico 作者:  Wang Z.;  Zhao Y.;  Zhao Y.;  Zhao Y. 收藏  |  浏览/下载：33/0  |  提交时间：2013/03/25 In order to realize real-time measurement based on image  proposes a design project of embedded image grabber and processing system based on camera link interface. The system adopts FPGA+DSP structure design. DSP used to process the image and send out processing results to external. FPGA adopts modularize design. It contains camera link interface module  image memory module  DSP connection module and so on. The experiment results show that the system design flexibility  small cubage  high real-time image processing  and can fulfil the requirement of real-time measurement. 2012 TSI Press.   High-order harmonics extension and isolated attosecond pulse generation in three-color field: Controlling factors 期刊论文  OAI收割 physics letters a, 2011, 卷号: 375, 期号: 41, 页码: 3641-3648 作者:  Feng, Liqiang;  Chu, Tianshu 收藏  |  浏览/下载：21/0  |  提交时间：2012/07/09 High-order harmonic generation  Time-dependent Schrodinger equation  Single isolated attosecond pulse  Laser parameter  Three-color laser field   Design of motion compensation mechanism of satellite remote sensing camera (EI CONFERENCE) 会议论文  OAI收割 International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications, May 24, 2011 - May 26, 2011, Beijing, China Gu S.; Yan Y.; Xu K.; Jin G. 收藏  |  浏览/下载：47/0  |  提交时间：2013/03/25 With the development of aerospace remote sensing technology  the ground resolution of remote sensing camera enhances continuously. Since there is relative motion between camera and ground target when taking pictures  the target image recorded in recording media is moved and blurred. In order to enhance the imaging quality and resolution of the camera  the image motion had to be compensated. In order to abate the effect of image motion to image quality of space camera and improve the resolution of the camera  the compensation method of image motion to space camera is researched. First  the reason of producing drift angle and adjustment principle are analyzed in this paper. This paper introduce the composition and transmission principle of image motion compensation mechanism. Second  the system adopts 80C31 as controller of drift angle  and adopts stepping motor for actuators  and adopts absolute photoelectric encoder as the drift Angle measuring element. Then the control mathematical model of the image motion compensation mechanism are deduced  and it achieve the closed-loop control of the drift angle position. At the last  this paper analyses the transmission precision of the mechanism. Through the experiment  we measured the actual precision of the image motion compensation mechanism  and compared with the theoretical analysis. There are two major contributions in this paper. First  the traditional image motion compensation mechanism is big volume and quality heavy. This has not fit for the development trend of space camera miniaturization and lightweight. But if reduce the volume and quality of mechanism  it will bring adverse effects for the precision and stiffness of mechanism. For this problem  This paper designed a image motion compensation that have some advantages such as small size  light weight at the same time  high precision  stiffness and so on. This image motion compensation can be applicable to the small optics cameras with high resolution. Second  the traditional mechanism control need to corrected  fitting and iterative for the control formula of mechanism. Only in this way  we can get the optimal control mathematical model. This paper has high precision of the control formula derived. It can achieve the high precision control without fitting  It also simplify the difficulty of control mathematical model establishment. This paper designed the range of adjusting of image motion compensation mechanism between -5 +5. Based on choosing-5  -4  -3  -2  -1  0  +1  +2  +3  +4  +4 as the expectation value of the imaginary drift angle  we get ten groups of the fact data in adjusting drift angle measured. The test results show that the precision of the drift angle control system can be achieved in 1. It can meet the system requirements that the precision of the control system is less than 3'  and it can achieve the high-precision image motion compensation. 2011 SPIE.