中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
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浏览/检索结果: 共9条,第1-9条 帮助

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Energy-preserving fully-discrete schemes for nonlinear stochastic wave equations with multiplicative noise 期刊论文  OAI收割
JOURNAL OF COMPUTATIONAL PHYSICS, 2022, 卷号: 451, 页码: 20
作者:  
Hong, Jialin;  Hou, Baohui;  Sun, Liying
  |  收藏  |  浏览/下载:34/0  |  提交时间:2022/04/29
Numerical study and acceleration of LBM-RANS simulation of turbulent flow 期刊论文  OAI收割
CHINESE JOURNAL OF CHEMICAL ENGINEERING, 2018, 卷号: 26, 期号: 1, 页码: 31-42
作者:  
Shu, Shuli;  Yang, Ning
  |  收藏  |  浏览/下载:38/0  |  提交时间:2018/06/11
Preservation of physical properties of stochastic Maxwell equations with additive noise via stochastic multi-symplectic methods 期刊论文  OAI收割
JOURNAL OF COMPUTATIONAL PHYSICS, 2016, 卷号: 306, 页码: 500-519
作者:  
Chen, Chuchu;  Hong, Jialin;  Zhang, Liying
  |  收藏  |  浏览/下载:21/0  |  提交时间:2018/07/30
Practical aspects of p-multigrid discontinuous galerkin solver for steady and unsteady rans simulations 期刊论文  iSwitch采集
International journal for numerical methods in fluids, 2015, 卷号: 78, 期号: 11, 页码: 670-690
作者:  
Jiang, Zhenhua;  Yan, Chao;  Yu, Jian;  Yuan, Wu
收藏  |  浏览/下载:38/0  |  提交时间:2019/05/09
Tomographic TR-PIV measurement of coherent structure spatial topology utilizing an improved quadrant splitting method 期刊论文  OAI收割
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY, 2012, 卷号: 55, 期号: 10, 页码: 1863-1872
作者:  
Yang SQ;  Jiang N(姜楠);  Jiang, N
收藏  |  浏览/下载:28/0  |  提交时间:2013/01/18
Analysis of a diffractive microlens using the finite-difference time-domain method (EI CONFERENCE) 会议论文  OAI收割
作者:  
Liu Y.;  Liu H.;  Liu H.;  Liu H.;  Liu Y.
收藏  |  浏览/下载:27/0  |  提交时间:2013/03/25
The finite-difference time-domain (FDTD) method is used as rigorous electromagnetic analysis model to calculate the field for a diffractive microlens (DML). The FDTD is used for the entire solution rather than using a near- to far-field propagation method to obtain the far-field energy distribution  thus  all the results are vector based. We derived a formula to calculate the magnitude of electric field  which is time dependent and can be used to graphically show the light wave propagation and focusing process through a DML. Both the comparison and the integral methods are presented to obtain wave amplitude in full solution space  and the distribution of light energy behind a DML is illustrated based on the wave amplitude. The formula of diffractive efficiency of the DML is derived from a time-averaged Ponyting vector  which can indicate the propagation direction of light energy. Application of these formulations in the analysis of a DML example demonstrates the high accuracy and efficiency of our method. 2010 Society of Photo-Optical Instrumentation Engineers.  
Modulation transfer function measurement of sampled imaging systems in field test (EI CONFERENCE) 会议论文  OAI收割
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, April 26, 2010 - April 29, 2010, Dalian, China
作者:  
Yang L.;  Zhang J.;  Zhang J.;  Zhang J.;  Wang J.
收藏  |  浏览/下载:30/0  |  提交时间:2013/03/25
A digital mirror device (DMD) based light projector was developed as the target generator in modulation transfer function (MTF) measurement. In order to overcome the sampling-scene phase effect in MTF measurement of sampled imaging systems  a method using random targets is introduced to yield a phase-averaged MTF. The main potential problem of implementing this method is the fact that the stationary assumption of the random targets may be vitiated in practical measurement  especially in field test due to the ill condition. We provide an efficient model-independent way of analyzing and isolating the spectral contents arising from these additional contributions to MTF measurement. Algorithms with adaptive parameter selection were also developed for spectral estimation of the test image in order to overcome the challenge brought by the size limit of the test matrices for one certain field of view derived from the isoplantic region. The MTF measurement of a CCD video imager is used to demonstrate the measurement technique and illustrate the benefits over other methods. In order to validate the results  comparisons have been made between MTF measurements of imager implemented using this method and bar target direct measurements. 2010 Copyright SPIE - The International Society for Optical Engineering.  
Averaged estimation of functional-coefficient regression models with different smoothing variables 期刊论文  OAI收割
STATISTICS & PROBABILITY LETTERS, 2007, 卷号: 77, 期号: 4, 页码: 455-461
作者:  
Zhang, Riquan;  Li, Guoying
  |  收藏  |  浏览/下载:29/0  |  提交时间:2018/07/30
Non-parametric time series models for hydrological forecasting SCI/SSCI论文  OAI收割
2007
作者:  
Xia J.
收藏  |  浏览/下载:26/0  |  提交时间:2012/06/08