中国科学院机构知识库网格
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Effects of machine learning models and spatial resolution on land cover classification accuracy in Dali County, Shaanxi, China 期刊论文  OAI收割
INTERNATIONAL JOURNAL OF AGRICULTURAL AND BIOLOGICAL ENGINEERING, 2025, 卷号: 18, 期号: 1, 页码: 245-259
作者:  
Shi, Yu;  Jin, Ning;  Wu, Bingyan;  Wang, Zekun;  Wang, Shiwen
  |  收藏  |  浏览/下载:15/0  |  提交时间:2025/04/21
Numerical Method for Horizontal and Vertical Spatial Resolutions of Seismic Acquisition Geometries in Complex 3D Media 期刊论文  OAI收割
IEEE ACCESS, 2020, 卷号: 8, 页码: 116544-116555
作者:  
Wei, Wei;  Fu, Li-Yun;  Su, Jun;  Liu, Guozhang;  Sun, Weijia
  |  收藏  |  浏览/下载:45/0  |  提交时间:2020/08/03
Dynamics of cold pulses induced by super-sonic molecular beam injection in the EAST tokamak 期刊论文  OAI收割
NUCLEAR FUSION, 2019, 卷号: 59, 期号: 4, 页码: 6
作者:  
Liu, Yong;  Shi, Yuejiang;  Zhang, Tao;  Zhou, Chu;  Zou, Xiaolan
  |  收藏  |  浏览/下载:24/0  |  提交时间:2020/07/14
Comparative Analysis on Two Schemes for Synthesizing the High Temporal Landsat-like NDVI Dataset Based on the STARFM Algorithm 期刊论文  OAI收割
ISPRS International Journal of Geo-Information, 2015, 卷号: 4, 期号: 3, 页码: 1423-1441
作者:  
Li, Ainong;  Zhang, Wei;  Lei, Guangbin;  Bian, Jinhu
收藏  |  浏览/下载:43/0  |  提交时间:2015/12/21
Evaluation of spatial upscaling methods based on remote sensing data with multiple spatial resolutions (EI CONFERENCE) 会议论文  OAI收割
Satellite Data Compression, Communications, and Processing VIII, August 12, 2012 - August 13, 2012, San Diego, CA, United states
Ren R.; Gu L.; Cao J.; Chen H.; Sun J.
收藏  |  浏览/下载:29/0  |  提交时间:2013/03/25
In most applications of remote sensing data  special spatial information is required from a finer to a coarser spatial resolution with appropriate upscaling methods. The purpose of this paper is to compare and evaluate current spatial upscaling methods using MODIS remote sensing data with multiple spatial resolutions. In the research  Northeast China was selected as the study area. MODIS data with spatial resolutions of 250 m (2 bands) and 500 m (7 bands) were used as the test data. Through using the selected upscaling methods  the Band 1 and Band 2 data of MODIS were scaled up from 250 m to 500 m spatial resolution. On the basis of land cover characteristics of Northeast China  the MODIS data located in the study area was classified into the five land cover types  including water  grasslands  forests  farmlands and bare lands using maximum likelihood method. The land cover classification results were further compared with MODIS Land Cover Type product. Finally  Structural Similarity (SSIM) was selected to evaluate the effects of these upscaling methods. The research can provide more useful information for spatial scaling transformation in remote sensing data applications. 2012 SPIE.  
A new method of image reconstruction with high resolution in X-ray coded aperture imaging (EI CONFERENCE) 会议论文  OAI收割
Laser-Generated, Synchrotron, and Other Laboratory X-Ray and EUV Sources, Optics, and Applications II, August 2, 2005 - August 4, 2005, San Diego, CA, United states
作者:  
Sun Y.;  Sun Y.
收藏  |  浏览/下载:22/0  |  提交时间:2013/03/25
In the processing diagnosis of the inertia confinement fusion (ICF)  the ring coded aperture imaging technique is applied in order to gain high space and time resolutions simultaneously. The key of acquiring high spatial resolution is how to obtain a point spread function of an imaging system. The common method is the firsthand projection method which is an approximate one. The x-ray diffraction effect is neglected in the method  so the resolution of reconstructed image is decreased. We have derived the point spread function (PSF) of the ring coded aperture from scalar diffraction theory. And the Wiener filter is fabricated on the basis of the PSF. In National Key Laboratory of Laser Fusion  at China Academy of Engineering Physics  the imaging experiment on the diagnosis of ICF is completed using the ring coded aperture plate with inner diameter d1 = 250m and outer diameter d2 = 260m . The obtained coded image is processed by the Wiener filter which diffractive effect is considered. The processed results have shown that resolution and modulation contrast of acquired image are evidently better than the results obtained by the firsthand projection method.