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浏览/检索结果: 共11条，第1-10条 帮助

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Combination of time domain-system matrix and x-space methods to reconstruct magnetic particle images with isotropic resolution 期刊论文  OAI收割
PHYSICS IN MEDICINE AND BIOLOGY, 2024, 卷号: 69, 期号: 3, 页码: 13
作者:  Shan, Shihao;  Zhang, Chenglong;  Yin, Lin;  Yang, Xiaoli;  Yu, Dexin
  |  收藏  |  浏览/下载：33/0  |  提交时间：2024/02/20
An optimized three-dimensional time-space domain staggered-grid finite-difference method 期刊论文  OAI收割
FRONTIERS IN EARTH SCIENCE, 2023, 卷号: 10, 页码: 18
作者:  Liu, Wei;  Wang, Wei;  You, Jiachun;  Cao, Junxing;  Wang, Haibo
  |  收藏  |  浏览/下载：30/0  |  提交时间：2023/02/27
An optimized three-dimensional time-space domain staggered-grid finite-difference method 期刊论文  OAI收割
FRONTIERS IN EARTH SCIENCE, 2023, 卷号: 10, 页码: 18
作者:  Liu, Wei;  Wang, Wei;  You, Jiachun;  Cao, Junxing;  Wang, Haibo
  |  收藏  |  浏览/下载：22/0  |  提交时间：2023/02/27
Measurement of complex terahertz dielectric properties of polymers using an improved free-space technique 期刊论文  OAI收割
MEASUREMENT SCIENCE AND TECHNOLOGY, 2017, 卷号: 28, 期号: 4, 页码: 8
作者:  Chang, Tianying;  Zhang, Xiansheng;  Yang, Chuanfa;  Sun, Zhonglin;  Cui, Hong-Liang
  |  收藏  |  浏览/下载：19/0  |  提交时间：2018/03/15
Acoustic wave equation modeling based on implicit finite difference operators in the time-space domain 期刊论文  OAI收割
CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION, 2016, 卷号: 59, 期号: 4, 页码: 1491-1497
作者:  Chen Dong;  Liang Wen-Quan;  Xin Wei;  Yang Chang-Chun
  |  收藏  |  浏览/下载：22/0  |  提交时间：2017/11/22
Comparison of numerical dispersion for finite-difference algorithms in transversely isotropic media with a vertical symmetry axis 期刊论文  OAI收割
JOURNAL OF GEOPHYSICS AND ENGINEERING, 2015, 卷号: 12, 期号: 1, 页码: 108-113
作者:  Liang, Wen-Quan;  Wang, Yan-Fei;  Yang, Chang-Chun
  |  收藏  |  浏览/下载：15/0  |  提交时间：2018/09/26
Comparison of numerical dispersion for finite-difference algorithms in transversely isotropic media with a vertical symmetry axis 期刊论文  OAI收割
JOURNAL OF GEOPHYSICS AND ENGINEERING, 2015, 卷号: 12, 期号: 1, 页码: 108-113
作者:  Liang, Wen-Quan;  Wang, Yan-Fei;  Yang, Chang-Chun
  |  收藏  |  浏览/下载：17/0  |  提交时间：2018/09/26
Acoustic wave equation modeling with new time-space domain finite difference operators 期刊论文  OAI收割
CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION, 2013, 卷号: 56, 期号: 10, 页码: 3497-3506
作者:  Liang Wen-Quan;  Yang Chang-Chun;  Wang Yan-Fei;  Liu Hong-Wei
  |  收藏  |  浏览/下载：18/0  |  提交时间：2018/09/26
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.  
Rigorous vector analysis of diffractive microlens by using of finitedifference time-domain method (EI CONFERENCE) 会议论文  OAI收割
2009 International Conference on Optical Instruments and Technology, OIT 2009, October 19, 2009 - October 22, 2009, Shanghai, China
作者:  Liu Y.;  Liu H.;  Liu H.;  Liu H.;  Liu Y.
收藏  |  浏览/下载：32/0  |  提交时间：2013/03/25
We use finite difference time domain (FDFD) method as rigorous vector analysis model to simulate the focusing process of diffractive microlens (DML). Differing with most analysis model which the near field distributions are calculated by FDTD and then far field are obtained by using of propagation method  we obtain the fields in whole computational space by using of FDTD only. The advantages are that all the results are vector based and the computational time is saved greatly. In this paper  we present two methods to obtain wave amplitude  one is comparison method  and the other is integral method. Depending on wave amplitude in the whole computational space  one can conveniently obtain distributions of electric field intensity and calculate the time-average Poynting vector. We also present the formulation for calculating diffractive efficiency of DML based on time-average Poynting vector which denotes energy flow. As demonstration  a DML is analyzed by using of these algorithms. The time depended graphic results of FDTD show the process of wave propagation. The distribution of electric field intensity illustrates the focusing of the normal incident light. The focus pattern in the focal plane is also show. The diffractive efficiency of the DML is calculated by using of the energy flow method in this paper. The results show the high accuracy and efficiency of the model. 2009 SPIE.