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浏览/检索结果: 共15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 Relativistic HPIC-LBM and its Application in Large Temporal-spatial Turbulent Magnetic Reconnection. Part I. Model Development and Validation 期刊论文  OAI收割 Applied Mathematical Modelling, 2020, 卷号: 78, 页码: 932-967 作者:  Zhu BJ(朱伯靖);  Yan, Hui;  Zhong, Ying;  Chen, Jingkun;  Du, Yunfei   |  收藏  |  浏览/下载：181/0  |  提交时间：2019/10/22 Relativistic HPIC-LBM  3D LTSTMR  Oblique instability  Turbulent acceleration mechanism  Magnetic fluctuation-induced self-generating-organization region  Plasma turbulence-induced self-feeding-sustaining region  2.5D/3D Magnetic reconnection model   Electron acceleration in interaction of magnetic islands in large temporal-spatial turbulent magnetic reconnection 期刊论文  OAI收割 Earth and Planetary Physics, 2019, 卷号: 3, 期号: 1, 页码: 17-25 作者:  Zhu BJ(朱伯靖);  Yan H(颜辉);  David.A.Yuen;  Shi YL(石耀霖)   |  收藏  |  浏览/下载：76/0  |  提交时间：2019/01/07 Hybrid Particle Acceleration Mechanism  Large Temporal-spatial Turbulent Magnetic Reconnection  Hydro-dynamic-kinetic Model   Relativistic HPIC-LBM and its application in large temporal-spatial turbulent magnetic reconnection. Part II. Role of turbulence in the flux rope interaction 期刊论文  OAI收割 Applied Mathematical Modelling, 2019 作者:  Zhu BJ(朱伯靖);  Yan, Hui;  Zhong, Ying;  Chen, Jingkun;  Du, Yunfei   |  收藏  |  浏览/下载：77/0  |  提交时间：2019/05/31 Relativistic Hpic-lbm  3d Ltstmr  Oblique Instability  Turbulent Acceleration Mechanism  Slipping Magnetic Reconnection (1 St Type Mr)  Magnetic Field Line Break-rejoin Magnetic Reconnection (2nd Type Mr)  Magnetic Energy Conversion   Fast density clustering strategies based on the k-means algorithm 期刊论文  OAI收割 PATTERN RECOGNITION, 2017, 卷号: 71, 页码: 375-386 作者:  Bai, Liang;  Cheng, Xueqi;  Liang, Jiye;  Shen, Huawei;  Guo, Yike   |  收藏  |  浏览/下载：43/0  |  提交时间：2019/12/12 Cluster analysis  Density-based clustering  Acceleration mechanism  Approximate algorithm  k-means   Particle Acceleration and Emission Processes in Mrk 421 期刊论文  OAI收割 PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN, 2013, 卷号: 65, 期号: 5 作者:  Cao G(曹刚);  Wang JC(王建成) 收藏  |  浏览/下载：20/0  |  提交时间：2016/04/06 acceleration of particles  galaxies: BL Lacertae objects: individual: Mrk 421  galaxies: jets  gamma-rays: theory  radiation mechanism: non-thermal   Mechanisms and Simulation of Accelerated Shrinkage of Continental Glaciers: A Case Study of Urumqi Glacier No. 1 in Eastern Tianshan, Central Asia 期刊论文  iSwitch采集 JOURNAL OF EARTH SCIENCE, 2011, 卷号: 22, 期号: 4, 页码: 423-430 作者:  Li, Zhongqin;  Li, Huilin;  Chen, Yaning 收藏  |  浏览/下载：27/0  |  提交时间：2019/10/08 glacier  acceleration of recession  Urumqi Glacier No. 1  mechanism   The research on adaptive measurement of angular acceleration for photoelectric servo turntable (EI CONFERENCE) 会议论文  OAI收割 2011 International Conference on Mechatronic Science, Electric Engineering and Computer, MEC 2011, August 19, 2011 - August 22, 2011, Jilin, China 作者:  Guo J.;  Chen J.;  Guo J. 收藏  |  浏览/下载：21/0  |  提交时间：2013/03/25 The paper proposes a new measurement method of angular acceleration for photoelectric servo turntable. Piezoelectric angular acceleration sensor is used to measure angular acceleration directly  Adaptive FIR filter based on LMS algorithm is established on DSP  by which angular acceleration signal can be filtered and corrected errors adaptively  then angular acceleration signals can be measured adaptively. This method avoids measurement errors and calculation noise by computing angular acceleration indirectly  thus improving measurement precision and making measurement results better than traditional methods. The gotten angular acceleration can be sent to servo control mechanism as feed forward control signals to improve control effects of servo turntable significantly. 2011 IEEE.   Analyse the angular velocity estimation errors of -- filter based on high sampling rate (EI CONFERENCE) 会议论文  OAI收割 2011 2nd International Conference on Mechanic Automation and Control Engineering, MACE 2011, July 15, 2011 - July 17, 2011, Inner Mongolia, China 作者:  Zhang Y. 收藏  |  浏览/下载：31/0  |  提交时间：2013/03/25 In order to get angular velocity of stabilization servo mechanism from angular position sensors  -- filter based on high sampling rate was established  model and error characteristics were analyzed. With the hypothesis of constant acceleration  -- filter and its angular velocity transfer function were deduced. Combing with optimum parameters  the effects of and sample rate on the error characteristics were evaluated. According to the requirements of stabilization servo mechanism  the frequency characteristics of angular velocity transfer function are analyzed  and the filter parameters are designed. The experimental which filter tracked and smoothed sinusoidal signal  the results show that when the cutoff frequency of angular velocity loop is 44.9rad/s  sampling period and parameters are 0.08ms and 0.01279 respectively  the phase leading of angular position is 70. -- filter tracked sinusoidal signals with maximum angular velocity(30/s) and maximum angular acceleration(30/s2)  the error of angular velocity estimation was 0.053/s. In the engineering of electro-optical stabilization servo mechanism  -- filter can reduce noise effectively  and reached the requirement of platform angular velocity estimation. Also it is one of the effective methods to get angular velocity from angular position sensors. 2011 IEEE.   The angular velocity estimation principal of -- filter based on high sampling rate (EI CONFERENCE) 会议论文  OAI收割 2011 2nd International Conference on Mechanic Automation and Control Engineering, MACE 2011, July 15, 2011 - July 17, 2011, Inner Mongolia, China 作者:  Zhang Y. 收藏  |  浏览/下载：28/0  |  提交时间：2013/03/25 In order to get angular velocity of stabilization servo mechanism from angular position sensors  -- filter and its angular velocity transfer function were predigested. Combing with optimum parameters  -- filter based on high sampling rate was established  the effect of and sample rate on filter nature frequency were evaluated. According to the requirements of stabilization platform  the principle of steady and transient tracking filter differential were proved. With the hypothesis of constant acceleration  the frequency characteristics of angular velocity transfer function were analyzed  three-dimensional Kalman filter was simplified  and the filter parameters were designed. The results show that when the spectrum of input signal was lower than 6rad/s  parameters was 0.02  and sampling period were 0.08ms and 0.1ms respectively  the filter can realize differential exactly  when the spectrum was 9rad/s  the precision was no less than 1.1%  the phase leading of angular position was no less than 70  the natural frequency should be higher than the cut-off frequency of stabilization platform was two or three times. In the engineering of electro-optical stabilization servo mechanism  -- filter has properties of tracking differential  and reached the requirement of platform angular velocity estimation. Also it is one of the effective methods to get angular velocity from angular position sensors. 2011 IEEE.   The ionospheric up-flowing He+ ion distribution in the magnetosphere 期刊论文  OAI收割 Journal of Atmospheric and Solar-Terrestrial Physics, 2009, 卷号: 71, 期号: 16, 页码: 1630-1635 Shi, J. K.; Guo, J. G.; Torkar, K.; Liu, Z. X. 收藏  |  浏览/下载：31/0  |  提交时间：2014/04/30 Ionosphere  Up-flowing He+ ions  Inner magnetosphere  Distribution  satellite-observations  acceleration  magnetotail  mechanism  plasma  model