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浏览/检索结果: 共13条，第1-10条 帮助

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Non-inertial computational framework for long-distance shock-driven object dynamics 期刊论文  OAI收割
COMPUTERS & FLUIDS, 2025, 卷号: 286, 页码: 106474
作者:  Wang DG(王大高);  Han GL(韩桂来);  Liu MK(刘美宽);  Li ZX(李宗贤)
  |  收藏  |  浏览/下载：6/0  |  提交时间：2024/12/02
A hybrid many-objective cuckoo search algorithm 期刊论文  OAI收割
SOFT COMPUTING, 2019, 卷号: 23, 期号: 21, 页码: 10681-10697
作者:  Cui, Zhihua;  Zhang, Maoqing;  Wang, Hui;  Cai, Xingjuan;  Zhang, Wensheng
  |  收藏  |  浏览/下载：47/0  |  提交时间：2020/03/30
Mechanism of competitive growth during directional solidification of a nickel-base superalloy in a three-dimensional reference frame 期刊论文  OAI收割
Acta Materialia, 2012, 卷号: 60, 期号: 9, 页码: 3965-3975
X. B. Meng; Q. Lu; X. L. Zhang; J. G. Li; Z. Q. Chen; Y. H. Wang; Y. Z. Zhou; T. Jin; X. F. Sun; Z. Q. Hu
收藏  |  浏览/下载：24/0  |  提交时间：2013/02/05
Non-linear compensation algorithm of LOS locating in aerial remote sensor (EI CONFERENCE) 会议论文  OAI收割
2011 International Conference on Electronic and Mechanical Engineering and Information Technology, EMEIT 2011, August 12, 2011 - August 14, 2011, Harbin, China
作者:  Li J.;  Li Y.;  Li Y.;  Li Y.;  Li Y.
收藏  |  浏览/下载：34/0  |  提交时间：2013/03/25
A non-linear light-of-sight(LOS) locating compensation algorithm for certain aerial remote sensor is presented in this paper. The LOS locating system is composed of two main components  which are an inertial reference frame to provide coarse LOS locating and a 2-axis Fast Steering Mirror to remove the frame's residual error. The azimuth and elevation of LOS are both affected by the FSM two-degree-of-freedom rotation  which should be dealt with to raise the accuracy of LOS location. This paper extrapolates LOS locating algorithm of FSM by coordinate transformation  and gives corresponding deviation analysis for different LOS poiting angles. It is found that the angle deviation grows rapidly with range of FSM's travel enlarging  so the deviation must be eliminated. Through the data analysis for deviation  a non-linear compensation algorithm is proved effective to reduce the error of LOS significantly. Taking LOS changing in [-3 deg  3 deg] as an example  two analytic expressions are given  and the LOS locating accuracy rises by 34 times compared with non-linear compensation unused  and the cross coupling of LOS loating is 0.08%. 2011 IEEE.  
Visual quality assessment for web videos 期刊论文  OAI收割
JOURNAL OF VISUAL COMMUNICATION AND IMAGE REPRESENTATION, 2010, 卷号: 21, 期号: 8, 页码: 826-837
作者:  Xia, Tian;  Mei, Tao;  Hua, Gang;  Zhang, Yong-Dong;  Hua, Xian-Sheng
  |  收藏  |  浏览/下载：25/0  |  提交时间：2019/12/16
Non-uniformity correction in multi-CCD imaging system (EI CONFERENCE) 会议论文  OAI收割
2010 2nd International Conference on Mechanical and Electronics Engineering, ICMEE 2010, August 1, 2010 - August 3, 2010, Kyoto, Japan
Tao M.; Ren J.
收藏  |  浏览/下载：27/0  |  提交时间：2013/03/25
The non-uniformity phenomenon exists in each channel of multi-CCD imaging systems. The factors which lead to the problem are complex. The conventional calibrating algorithms can not consider all of these factors and have poor effects. According to the characters of multi-CCD imaging systems  a non-uniformity correction method based on the scene was proposed by adopting the traditional two-point correction theories. The correction coefficient of each channel image can be calculated via the linear relation between the two neighboring pixel lines in the two-channel images. Compared with the conventional two-point calibration and multi-point calibration methods  contrastive calibrating results were obtained. This method does not need any standard lighted image as reference source  which provides a real time way for calibrating the multi-CCD imaging systems in practical applications. 2010 IEEE.  
Nonlinear control design for system with mechanical resonance based on two tracking-differentiators (EI CONFERENCE) 会议论文  OAI收割
2010 IEEE International Conference on Mechatronics and Automation, ICMA 2010, August 4, 2010 - August 7, 2010, Xi'an, China
作者:  Li J.;  Li Y.;  Li Y.;  Li Y.;  Li Y.
收藏  |  浏览/下载：22/0  |  提交时间：2013/03/25
A nonlinear control strategy for controlling a motion system with mechanical resonance is presented in this paper. A mathematical model of the servo system is derived according to the parameters of an actual system. By using two Tracking-Differentiators  reference input and system output are tracked and their differential signals are given simultaneously. A nonlinear PD control law in velocity loop is designed based on non-smooth feedback. The simulation results show that the control law is superior remarkably in performance to linear PD control law and the classical PID control law. Tracking-Differentiator resolves the contradiction between rapidity and overshoot of system response. The nonlinear PD control law improves system dynamic performance and intensifies the ability of disturbance rejection. The control design achieved in this paper makes the servo system more robust. 2010 IEEE.  
Construction of mm-level terrestrial reference frame 期刊论文  OAI收割
CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION, 2009, 卷号: 52, 期号: 11, 页码: 2704-2711
作者:  Song Shu-Li;  Zhu Wen-Yao;  Xiong Fu-Wen;  Gao Jun
收藏  |  浏览/下载：22/0  |  提交时间：2015/08/18
Expanded Q4 Quality Assessment for Pan-Sharpened MultiSpectral Image 会议论文  OAI收割
Geoinformatics 2008 and Joint Conference on Gis and Built Environment: Advanced Spatial Data Models and Analyses, Parts 1 and 2, Bellingham
Wang Zhongwu; Zhao Zhongming
收藏  |  浏览/下载：15/0  |  提交时间：2014/12/07
On applying the extended intrinsic mean spin tensor to modelling the turbulence in non-inertial frames of reference 期刊论文  iSwitch采集
Science in china series g-physics mechanics & astronomy, 2008, 卷号: 51, 期号: 11, 页码: 1691-1706
作者:  Huang YuNing;  Ma HuiYang;  Xu JingLei
收藏  |  浏览/下载：35/0  |  提交时间：2019/05/10