中国科学院机构知识库网格系统: 检索

Towards interpreting machine learning models for understanding the relationship between vegetation growth and climate factors: A case study of the Anhui Province, China 期刊论文 OAI收割
ECOLOGICAL INDICATORS, 2024, 卷号: 167
作者: Bao, Nana; Peng, Kai; Yan, Xingting; Lu, Yanxi; Liu, Mingyu

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收藏 | 浏览/下载：13/0 | 提交时间：2024/11/20

Vegetation index Climate Machine learning Interpretable methods Anhui Province

A novel Greenness and Water Content Composite Index (GWCCI) for soybean mapping from single remotely sensed multispectral images 期刊论文 OAI收割
REMOTE SENSING OF ENVIRONMENT, 2023, 卷号: 295, 页码: 16
作者: Chen, Hui; Li, Huapeng; Liu, Zhao; Zhang, Ce; Zhang, Shuqing

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收藏 | 浏览/下载：43/0 | 提交时间：2023/10/09

Soybean mapping methods Automatic crop mapping Sentinel-2 Short-wave infrared (SWIR) Normalized difference vegetation index (NDVI)

Comparison of Forest Restorations with Different Burning Severities Using Various Restoration Methods at Tuqiang Forestry Bureau of Greater Hinggan Mountains 期刊论文 OAI收割
REMOTE SENSING, 2023, 卷号: 15, 期号: 10, 页码: 16
作者: Zhao, Guangshuai; Xu, Erqi; Yi, Xutong; Guo, Ye; Zhang, Kun

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收藏 | 浏览/下载：29/0 | 提交时间：2023/10/09

forest fire forest restoration remote sensing index Landsat-5 data burning severity restoration methods

A holistic assessment of water quality condition and spatiotemporal patterns in impounded lakes along the eastern route of China's South-to-North water diversion project 期刊论文 OAI收割
WATER RESEARCH, 2020, 卷号: 185, 页码: 14
作者: Qu, Xiao; Chen, Yushun; Liu, Han; Xia, Wentong; Lu, Ying

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收藏 | 浏览/下载：54/0 | 提交时间：2021/01/15

Water quality assessment Water quality index (WQI) Spatiotemporal patterns Multiple statistical methods, South-to-North water diversion projects (SNWDP)

Constraining the X-Ray-Infrared Spectral Index of Second-timescale Flares from SGR 1935+2154 with Palomar Gattini-IR 期刊论文 OAI收割
The Astrophysical Journal, 2020, 卷号: 901, 页码: L7
作者: HXMT

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收藏 | 浏览/下载：27/0 | 提交时间：2022/02/08

Radio transient sources Magnetars Soft gamma-ray repeaters 2008 992 1471 Astrophysics - High Energy Astrophysical Phenomena Astrophysics - Instrumentation and Methods for Astrophysics Abstract: The Galactic magnetar SGR 1935+2154 has been reported to produce the first example of a bright millisecond-duration radio burst (FRB 200428) similar to the cosmological population of fast radio bursts (FRBs). The detection of a coincident bright X-ray burst represents the first observed multiwavelength counterpart of an FRB. However, the search for similar emission at optical wavelengths has been hampered by the high inferred extinction on the line of sight. Here, we present results from the first search for second-timescale emission from the source at near-infrared (NIR) wavelengths using the Palomar Gattini-IR observing system in the J band, enabled by a novel detector readout mode that allows short exposure times of ?0.84 s with 99.9% observing efficiency. With a total observing time of ?12 hr (?47,728 images) during its 2020 outburst, we place median 3Ҡlimits on the second-timescale NIR fluence of ?18 Jy ms (13.1 AB mag). The corresponding extinction-corrected limit is ?125 Jy ms for an estimated extinction of A_J = 2.0 mag. Our observations were sensitive enough to easily detect an NIR counterpart of FRB 200428 if the NIR emission falls on the same power law as observed across its radio to X-ray spectrum. We report nondetection limits from epochs of four simultaneous X-ray bursts detected by the Insight-HXMT and NuSTAR telescopes during our observations. These limits provide the most stringent constraints to date on fluence of flares at 10¹⁴ Hz, and constrain the fluence ratio of the NIR emission to coincident X-ray bursts to R_NIR ? 0.025 (fluence index ?0.35).

Propagation of Near-infrared Light in Skin Tissue and the Design of Optical Fiber Detection Structure 期刊论文 OAI收割
Guangzi Xuebao/Acta Photonica Sinica, 2018, 卷号: 47, 期号: 1
作者: Gao, Jing; Han, Guang; Lu, Qi-Peng

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收藏 | 浏览/下载：27/0 | 提交时间：2019/09/17

Tissue engineering Infrared devices Intelligent systems Light Light propagation Light sources Model buildings Monte Carlo methods Near infrared spectroscopy Optical fibers Optical properties Photons Refractive index Structural design Tissue

Risk assessment of heavy metals in soil of Tongnan District (Southwest China): evidence from multiple indices with high-spatial-resolution sampling 期刊论文 OAI收割
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH, 2017, 卷号: 24, 期号: 25, 页码: 20282-20290
作者: Ma, Yongmei; Jia, Zhongmin; Li, Siyue; Ma, Yongmei; Jia, Zhongmin

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收藏 | 浏览/下载：31/0 | 提交时间：2018/03/05

Index methods Ecological risk assessment Igeo EF RI

全国生态系统最终产品与服务及其生态经济价值评估 学位论文 OAI收割
博士后, 北京: 中国科学院研究生院, 2015
作者: 戴子云

收藏 | 浏览/下载：177/0 | 提交时间：2016/07/14

陆地生态系统生态系统产品与服务指标体系评估方法，terrestrial ecosystems ecosystem goods and services index system evaluation methods

Baseflow characteristics in alpine rivers - a multi-catchment analysis in Northwest China SCI/SSCI论文 OAI收割
2015
作者:

收藏 | 浏览/下载：49/0 | 提交时间：2015/12/09

Baseflow index Recession constant Snowmelt Glacier melt Streamflow regional estimation separation methods conceptual-model flow separation water-balance basin regression streamflow index discharge

IoT-SVKSearch: A real-time multimodal search engine mechanism for the internet of things 期刊论文 OAI收割
International Journal of Communication Systems, 2014, 卷号: 27, 期号: 6, 页码: 871-897
Ding, Zhiming (1); Chen, Zhikui (2); Yang, Qi (3)

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收藏 | 浏览/下载：35/0 | 提交时间：2014/12/16

search engines index methods sensor networks spatial-temporal databases internet of things information retrieval for big data