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浏览/检索结果: 共37条，第1-10条 帮助

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A high-order modified finite-volume method on Cartesian grids for nonlinear convection-diffusion problems 期刊论文  OAI收割
COMPUTATIONAL & APPLIED MATHEMATICS, 2020, 卷号: 39, 期号: 3, 页码: 20
作者:  Du, Yulong;  Wang, Yahui;  Yuan, Li
  |  收藏  |  浏览/下载：19/0  |  提交时间：2020/09/23
A High-Order Modified Finite Volume WENO Method on 3D Cartesian Grids 期刊论文  OAI收割
COMMUNICATIONS IN COMPUTATIONAL PHYSICS, 2019, 卷号: 26, 期号: 3, 页码: 768-784
作者:  Du, Yulong;  Yuan, Li;  Wang, Yahui
  |  收藏  |  浏览/下载：54/0  |  提交时间：2020/01/10
An improved unstructured WENO method for compressible multi-fluids flow 期刊论文  OAI收割
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS, 2016, 卷号: 82, 期号: 3, 页码: 113-129
作者:  Zheng HW(郑洪伟);  Zhao WG(赵文赓)
收藏  |  浏览/下载：25/0  |  提交时间：2016/12/08
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
High order weighted essentially nonoscillatory WENO-eta schemes for hyperbolic conservation laws 期刊论文  OAI收割
JOURNAL OF COMPUTATIONAL PHYSICS, 2014, 卷号: 269, 期号: 1, 页码: 355-385
作者:  Fan, Ping
收藏  |  浏览/下载：25/0  |  提交时间：2014/08/28
High order weighted essentially nonoscillatory WENO-eta schemes for hyperbolic conservation laws 期刊论文  OAI收割
Journal of Computational Physics, 2014, 卷号: 269, 页码: 355-385
作者:  Fan P
收藏  |  浏览/下载：40/0  |  提交时间：2014/06/19
Structural design of large aperture rectangular mirror for space telescope (EI CONFERENCE) 会议论文  OAI收割
2nd International Conference on Civil Engineering and Transportation, ICCET 2012, October 27, 2012 - October 28, 2012, Guilin, China
作者:  Li Z.;  Li Z.
收藏  |  浏览/下载：41/0  |  提交时间：2013/03/25
Structural design of large aperture mirror is one of the key technologies for space telescope development. To meet the requirements of high stiffness  strength and thermal dimensional stability  some factors such as support scheme  materials selection  lightweight design and flexible support design were taken into account. The three supports location of the mirror was determined according to the modal analytical solution. By adjusting the parameters of flexure hinge  influences of gravity  assembly stress and thermal stress on the mirror were reduced obviously. Finite element analysis (FEA) results indicate that the surface accuracy reach to rms10.2nm and 10.8nm under the gravity along optical axis direction and 5C uniform temperature rise respectively  the fundamental frequency of the mirror component is 268Hz. Dynamics test shows that the first order natural frequency is 256Hz  which shows an error less than 5% compared to FEA results. (2013) Trans Tech Publications  Switzerland.  
Implementation and verification of high-order accurate discontinuous Galerkin method on 2-D unstructured grids 会议论文  OAI收割
International Symposium on Mechatronics and Applied Mechanics, ISMAM 2013, Nanjing, China, MAY 15-16, 2013
作者:  Zhao WG(赵文赓);  Zheng HW(郑洪伟)
收藏  |  浏览/下载：28/0  |  提交时间：2014/02/24
A new algorithm for solving the best-fit sphere of optical aspherical surface (EI CONFERENCE) 会议论文  OAI收割
2nd International Conference on Advances in Materials and Manufacturing, ICAMMP 2011, December 16, 2011 - December 18, 2011, Guilin, China
作者:  Lin J.;  Lu M.
收藏  |  浏览/下载：38/0  |  提交时间：2013/03/25
To solve the best-fit sphere (BFS) accurately is one of the technological keys for the generating and testing of optical aspherical surfaces. This paper presents a new algorithm for solving the BFS of aspherical surfaces to suppress some deficiencies in the existing BFS algorithms. In the proposed approach  it is not only suitable for the conic surface  a BFS is constructed  but also for higher order aspheres. The obtained asphericity and material removal function is more suitable for the machining and test. (2012) Trans Tech Publications  which passes through both sides of endpoints in the section o -?xy of the aspherical surfaces  Switzerland.  the center of the BFS is shifted along the x-axis  and its radius of curvature is automatically computed. The variable step size method is proposed to speed up the convergence of the iteration. Through numerically solving the BFS of conic and cubic surface  the advantages of the proposed approach are verified. The results show that the proposed approach is of rapid convergence  and high accuracy  
Design and experimental research of a new type focus mechanism used in space-based telescope (EI CONFERENCE) 会议论文  OAI收割
2012 9th IEEE International Conference on Mechatronics and Automation, ICMA 2012, August 5, 2012 - August 8, 2012, Chengdu, China
作者:  Wang D.
收藏  |  浏览/下载：34/0  |  提交时间：2013/03/25
The position of focal plane will be changed because of temperature fluctuation and vacuum environment. In order to make the telescope work well  positioning accuracy of the mechanism is 0.008mm. The performance satisfies the need of precision  a focusing mechanism is needed. To majority of large space-based telescopes  and the scheme design is reasonable and practicable. 2012 IEEE.  the general way to do this would be to use a reflector  which was located in the backfocal distance. One of typical schemes of this mechanism was introduced  however  because of the big axial size  the mechanism can't be used when the size of the enclosure was limited. A new type of focusing mechanism was introduced  which has such advantages of small size  high accuracy and low mass. The design and test methods had been discussed. According to the results  the repeatability positioning accuracy is 0.0025mm