中国科学院机构知识库网格系统: 检索

CLDRNet: A Difference Refinement Network Based on Category Context Learning for Remote Sensing Image Change Detection 期刊论文 OAI收割
IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING, 2024, 卷号: 17, 页码: 2133-2148
作者: Wan, Ling; Tian, Ye; Kang, Wenchao; Ma, Lei

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收藏 | 浏览/下载：20/0 | 提交时间：2024/02/20

Feature extraction Task analysis Remote sensing Transformers Deep learning Semantics Support vector machines Category context learning (CCL) clustering learning (CL) difference map refinement (DMR) optical remote sensing image change detection (CD)

Evidence for WW/WZ vector boson scattering in the decay channel $\ell\nu$qq produced in association with two jets in proton-proton collisions at $\sqrt{s} =$ 13 TeV 期刊论文 OAI收割
PHYSICS LETTERS B, 2022, 卷号: 834, 页码: 137438
作者: CMS Collaboration

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收藏 | 浏览/下载：20/0 | 提交时间：2023/11/09

p p: colliding beams vector boson: pair production dijet: associated production W: pair production Z0: associated production vector boson: scattering parton: distribution function p p: scattering transverse momentum: missing-energy W: hadronic decay Z0: hadronic decay parton: transverse momentum muon quantum chromodynamics CMS electroweak interaction electron dijet: mass spectrum final state: ((n)jet lepton) CERN LHC Coll rapidity: difference signature phase space channel cross section: measured experimental results 13000 GeV-cms

Optimized pseudo-analytical method for decoupled elastic wave equations 期刊论文 OAI收割
CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION, 2017, 卷号: 60, 期号: 9, 页码: 3555-3573
作者: Feng Hai-Xin; Yan Jun; Liu Hong; Sun Jun; Wang Zhi-Yang

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收藏 | 浏览/下载：24/0 | 提交时间：2017/11/24

Second-order time difference scheme Elastic wave equations Vector wavefield decomposition Low-rank decomposition Optimized pseudo-analytical method

Phenology-based Spartina alterniflora mapping in coastal wetland of the Yangtze Estuary using time series of GaoFen satellite no. 1 wide field of view imagery 期刊论文 OAI收割
JOURNAL OF APPLIED REMOTE SENSING, 2017, 卷号: 11
作者: Ai, Jinquan

收藏 | 浏览/下载：63/0 | 提交时间：2017/09/05

phenology-based mapping normalized difference vegetation index time series classification support vector machine invasive plant species training sample sizes

Preventing numerical oscillations in the flux-split based finite difference method for compressible flows with discontinuities, II 期刊论文 OAI收割
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS, 2016, 卷号: 80, 期号: 5, 页码: 306-316
作者: He ZW; Zhang YS; Li XL(李新亮); Tian BL

收藏 | 浏览/下载：30/0 | 提交时间：2016/03/21

contact discontinuity material interface finite difference method flux vector splitting local characteristic decomposition equation of state WENO

Preventing numerical oscillations in the flux-split based finite difference method for compressible flows with discontinuities 期刊论文 OAI收割
JOURNAL OF COMPUTATIONAL PHYSICS, 2015, 卷号: 300, 页码: 269-287
作者: He ZW; Zhang YS; Li XL(李新亮); Li L; Tian BL

收藏 | 浏览/下载：45/0 | 提交时间：2016/01/08

Compressible flows Contact discontinuity Material interface Numerical oscillations Finite difference method Flux vector splitting WENO

Feature Coding via Vector Difference for Image Classification 会议论文 OAI收割
USA, 2012
作者: Zhao, Xin; Yu, Yinan; Huang, Yongzhen; Huang, Kaiqi; Tan, Tieniu

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收藏 | 浏览/下载：14/0 | 提交时间：2016/12/30

Image Classiﬁcation Feature Coding Vector Difference Additive Kernel

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：28/0 | 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.

Assessment of surface roughness by use of soft x-ray scattering (EI CONFERENCE) 会议论文 OAI收割
Soft X-Ray Lasers and Applications VIII, August 4, 2009 - August 6, 2009, San Diego, CA, United states
Yan-li M.; Yong-gang W.; Shu-yan C.; Bo C.

收藏 | 浏览/下载：29/0 | 提交时间：2013/03/25

A soft x-ray reflectometer with laser produced plasma source has been designed which can work from wavelength 8nm to 30 nm and has high performance. Using the soft x-ray reflectometer above the scattering light distribution of silicon and zerodur mirrors which have super-smooth surfaces could be measured at different incidence angle and different wavelength. The measurement when the incidence angle is 2 degree and the wavelength is 1 lnm has been given in this paper. A surface scattering theory of soft x-ray grazing incidence optics based on linear system theory and an inverse scattering mathematical model is introduced. The vector scattering theory of soft x-ray scattering also is stated in detail. The scattering data are analyzed by both the methods above respectively to give information about the surface profiles. On the other hand both the two samples are measured by WYKO surface profiler and the surface roughness of the silicon and zerodur mirror is 1.3 nm and 1.5nm respectively. The calculated results are in quantitative agreement with those measured by WYKO surface profiler which indicates that soft x-ray scattering is a very useful tool for the evaluation of highly polished surfaces. But there still some difference among the results of different theory and WYKO and the possible reasons of such difference have been discussed in detail. 2009 SPIE.