中国科学院机构知识库网格系统: 检索

Fine-resolution estimation for urban surface water pollution susceptibility with multi-modal earth observation data 期刊论文 OAI收割
ENVIRONMENTAL RESEARCH LETTERS, 2024, 卷号: 19, 期号: 6, 页码: 9
作者: Shao, Mengmeng; Xie, Xiao; E, Chao; Li, Jingzhong; Ren, Wanxia

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收藏 | 浏览/下载：32/0 | 提交时间：2024/07/24

multi-modal earth observation data very-high-resolution UAV image deep learning surface water pollution susceptibility water quality

CMT: Cross Mean Teacher Unsupervised Domain Adaptation for VHR Image Semantic Segmentation 期刊论文 OAI收割
IEEE Geoscience and Remote Sensing Letters, 2021, 卷号: 0, 期号: 0, 页码: 1-5
作者: Liang Yan; Bin Fan; Shiming Xiang; Chunhong Pan

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收藏 | 浏览/下载：31/0 | 提交时间：2021/06/15

Cross mean teacher (CMT) self-training (ST) semantic segmentation unsupervised domain adaptation (UDA) very-high-resolution (VHR) image

An Impartial Semi-Supervised Learning Strategy for Imbalanced Classification on VHR Images 期刊论文 OAI收割
SENSORS, 2020, 卷号: 20, 期号: 22
作者: Sun, Fei; Fang, Fang; Wang, Run; Wan, Bo; Guo, Qinghua

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收藏 | 浏览/下载：16/0 | 提交时间：2022/03/01

image classification class imbalance impartial semi-supervised learning strategy (ISS) extreme gradient boosting (XGB) very-high-resolution (VHR)

Urban Change Detection Based on Dempster-Shafer Theory for Multitemporal Very High-Resolution Imagery 期刊论文 OAI收割
REMOTE SENSING, 2018, 卷号: 10, 期号: 7, 页码: 18
作者: Luo, Hui; Liu, Chong; Wu, Chen; Guo, Xian

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收藏 | 浏览/下载：18/0 | 提交时间：2019/05/23

very high-resolution image change detection data fusion D-S theory

Estimating aboveground biomass using Pleiades satellite image in a karst watershed of Guizhou Province, Southwestern China 期刊论文 OAI收割
Journal of Mountain Science, 2018, 卷号: 15, 期号: 5, 页码: 1020-1034
作者: Yin-ming Guo; Jian Ni; Li-bin Liu; Yang-yang Wu; Chun-zi Guo; Xin Xu; Qiao-lian Zhong

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收藏 | 浏览/下载：35/0 | 提交时间：2019/05/09

Aboveground Biomass Secondary Karst Forest Artificial Neural Network Vegetation Indices Very High Resolution Satellite Image

Estimating aboveground biomass using Pleiades satellite image in a karst watershed of Guizhou Province, Southwestern China 期刊论文 OAI收割
JOURNAL OF MOUNTAIN SCIENCE, 2018, 卷号: 15, 期号: 5, 页码: 1020-1034
作者: Guo, YM; Ni, J; Liu, LB; Wu, YY; Guo, CZ

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收藏 | 浏览/下载：18/0 | 提交时间：2020/09/29

Aboveground biomass Secondary karst forest Artificial neural network Vegetation indices Very high resolution satellite image

Comparing Machine Learning Classifiers for Object-Based Land Cover Classification Using Very High Resolution Imagery 期刊论文 OAI收割
REMOTE SENSING, 2015, 卷号: 7, 期号: 1, 页码: 153-168
作者: Qian, Yuguo; Zhou, Weiqi; Yan, Jingli; Li, Weifeng; Han, Lijian

收藏 | 浏览/下载：17/0 | 提交时间：2016/03/03

object-based classification machine learning classifiers very high resolution image urban area tuning parameters

A new low-bandwidth and wireless transmission scheme for CCd image (EI CONFERENCE) 会议论文 OAI收割
2012 International Symposium on Photonics and Optoelectronics, SOPO 2012, May 21, 2012 - May 23, 2012, Shanghai, China
作者: Zhang Y.

收藏 | 浏览/下载：35/0 | 提交时间：2013/03/25

The CCD (Charge-coupled Device) image sensor with its high resolution is capable of providing high definition image. However transmission requires high bandwidth which makes it very difficult to process and transmit in a long distance. The purpose of this paper is to propose a new method to process and transmit CCD image which can guarantee a low-bandwidth and long-distance data transmission. The innovation is that the transmission content of CCD image data can be flexibly selected and compressed firstly which will reduce the transmission data. Then it is processed on the base of communication protocol so that it can be fit for wireless transmission. At last it is transformed into wireless signal and transmitted using 3G technology. As a result the paper presents a wireless transmission scheme with the rate of 1.5Mbps for CCD image. 2012 IEEE.

Nanoscale patterns made by using a 13.5-nm Schwarzschild objective and a laser produced plasma source (EI CONFERENCE) 会议论文 OAI收割
Optical Micro- and Nanometrology IV, April 16, 2012 - April 18, 2012, Brussels, Belgium
作者: Wang X.; Wang X.; Wang X.; Wang Z.; Wang Z.

收藏 | 浏览/下载：37/0 | 提交时间：2013/03/25

Lithium fluoride (LiF) crystal is a very promising candidate as nanometer resolution EUV and soft X-ray detector. Compared with other EUV and soft X-ray detectors charge coupled device and photographic films LiF crystal has high resolution large field of view and wide dynamic range. In this paper using LiF crystal as EUV detector and a Schwarzschild objective (SO) working at 13.5nm as projection optics mesh images with 4.2 m 1.2 m and 800 nm line width and pinhole patterns with 1.5m diameter are acquired in projection imaging mode and direct writing mode respectively. Fluorescence intensity profiles of images show that the resolution of mesh image is 900 nm and the one of pinhole image is 800 nm. In the experiments a spherical condense mirror based on normal incidence type is used to eliminate the damage and contamination on the masks (mesh and pinhole) caused by the laser plasma and the energy density is not decreased compared with that the masks are close to the plasma. The development of the SO the alignment of the objective and the imaging experiments are also reported. 2012 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).

Study on spectrograph for ionosphere: A broadband imaging instrument prototype for far-ultraviolet (EI CONFERENCE) 会议论文 OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications, May 24, 2011 - May 26, 2011, Beijing, China
作者: Wang S.-R.; Lin G.-Y.; Yu L.

收藏 | 浏览/下载：36/0 | 提交时间：2013/03/25

Current research on space-based exploration for the ionosphere needs more advanced technologies. Because the spectral signals in the ionosphere distributing basically in the far-ultraviolet waveband are very weak. Usual spectrometer structures and detectors such as CCD can't receive enough information. Based on this principle of atmospheric sounding the imaging spectrometer prototype for ionosphere detection application was designed to solve the problem. This prototype consists of the telescope and the imaging spectrometer. The simple structure and small number of mirrors can help higher transmission efficiency be achieved and weak signals detection be implemented. The telescope is an off-axis parabolic mirror and the spectrometer is a modified Czerny-Turner spectral imaging system. Modified Czerny-Turner spectrometer contains a spherical mirror a fixed plane grating and a toroidal mirror. By adjusting the incident angle to the collimating mirror and using toroidal mirror coma and astigmatism were corrected well. We also optimize distances between the grating to the focusing mirror and the focusing mirror to the image plane to improve disadvantages of traditional Czerny-Turner structure. Designed results demonstrate that aberrations are substantially corrected and high image quality can be obtained in broad waveband. The photon counting Wedge-Strip-Anode detector with micro-channel planes as the receiving plane is accepted for the instrument prototype. The other photon counting 2-D detector responding well for weak light such as Cross-Delay line detector and MAMA detector can also be used for detection. The calibration and performances testing system is made of a vacuum system a deuterium lamp a monochrometer and the instrument prototype. Results obtained from the experiment show that the spectral resolution is 2.4 nm and the spatial resolution is 80 m. The other calibration experiments are running. The technology of the spectrometer prototype is important for the research and applications of ionosphere remote sensing. 2011 SPIE.