中国科学院机构知识库网格系统: 检索

Identifying large-area mangrove distribution based on remote sensing: A binary classification approach considering subclasses of non-mangroves 期刊论文 OAI收割
INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION, 2022, 卷号: 108, 页码: 17
作者: Zhao, Chuanpeng; Qin, Cheng-Zhi

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收藏 | 浏览/下载：28/0 | 提交时间：2022/09/21

Binary classification Feature selection Subclass settings Google Earth Engine Mangrove distribution

Identifying large-area mangrove distribution based on remote sensing: A binary classification approach considering subclasses of non-mangroves 期刊论文 OAI收割
INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION, 2022, 卷号: 108, 页码: 17
作者: Zhao, Chuanpeng; Qin, Cheng-Zhi

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收藏 | 浏览/下载：29/0 | 提交时间：2022/09/21

Binary classification Feature selection Subclass settings Google Earth Engine Mangrove distribution

Deep Category-Level and Regularized Hashing With Global Semantic Similarity Learning 期刊论文 OAI收割
IEEE TRANSACTIONS ON CYBERNETICS, 2021, 卷号: 51, 期号: 12, 页码: 6240-6252
作者: Chen, Yaxiong; Lu, Xiaoqiang

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收藏 | 浏览/下载：47/0 | 提交时间：2022/01/26

Semantics Binary codes Image retrieval Force Machine learning Cybernetics Benchmark testing Category-level semantics deep feature similarity deep hashing image retrieval

Features Combined Binary Descriptor Based on Voted Ring-Sampling Pattern 期刊论文 OAI收割
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY, 2020, 卷号: 30, 期号: 10, 页码: 3675-3687
作者: Liu, Hongmin; Zhang, Qianqian; Fan, Bin; Wang, Zhiheng; Han, Junwei

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收藏 | 浏览/下载：26/0 | 提交时间：2021/01/07

Histograms Feature extraction Encoding Task analysis Fans Computational efficiency Memory management Binary descriptor combined features gradient feature intensity feature ring-sampling pattern voting strategy

Learning blur invariant binary descrip for face recognition 期刊论文 OAI收割
Neurocomputing, 2020, 卷号: 404, 页码: 34-40
作者: Zhao, Chen; Li, Xuelong; Dong, Yongsheng

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收藏 | 浏览/下载：35/0 | 提交时间：2020/06/02

Blur robust face recognition Feature learning Binary descriptor

Efficient nearest neighbor search in high dimensional hamming space 期刊论文 OAI收割
PATTERN RECOGNITION, 2020, 卷号: 99, 页码: 11
作者: Fan, Bin; Kong, Qingqun; Zhang, Baoqian; Liu, Hongmin; Pan, Chunhong

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收藏 | 浏览/下载：61/0 | 提交时间：2020/03/30

Binary feature Feature matching Approximate nearest neighbor search Scalable image matching

Deep Heterogeneous Hashing for Face Video Retrieval 期刊论文 OAI收割
IEEE TRANSACTIONS ON IMAGE PROCESSING, 2020, 卷号: 29, 页码: 1299-1312
作者: Qiao, Shishi; Wang, Ruiping; Shan, Shiguang; Chen, Xilin

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收藏 | 浏览/下载：25/0 | 提交时间：2020/12/10

Face Covariance matrices Task analysis Binary codes Kernel Manifolds Feature extraction Face video retrieval deep heterogeneous hashing Riemannian kernel mapping structured matrix backpropagation

An underlying clock in the extreme flip-flop state transitions of the black hole transient Swift J1658.2-4242 期刊论文 OAI收割
Astronomy and Astrophysics, 2020, 卷号: 641, 页码: A101
作者: HXMT

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收藏 | 浏览/下载：59/0 | 提交时间：2022/02/08

accretion accretion disks black hole physics X-rays: binaries time Astrophysics - High Energy Astrophysical Phenomena Abstract:
Aims: Flip-flops are top-hat-like X-ray flux variations, which have been observed in some transient accreting black hole binary systems, and feature simultaneous changes in the spectral hardness and the power density spectrum (PDS). They occur at a crucial time in the evolution of these systems, when the accretion disc emission starts to dominate over coronal emission. Flip-flops remain a poorly understood phenomenon, so we aim to thoroughly investigate them in a system featuring several such transitions.
Methods: Within the multitude of observations of Swift J1658.2-4242 during its outburst in early 2018, we detected 15 flip-flops, enabling a detailed analysis of their individual properties and the differences between them. We present observations by XMM-Newton, NuSTAR, Astrosat, Swift, Insight-HXMT, INTEGRAL, and ATCA. We analysed their light curves, searched for periodicities, computed their PDSs, and fitted their X-ray spectra, to investigate the source behaviour during flip-flop transitions and how the interval featuring flip-flops differs from the rest of the outburst.
Results: The flip-flops of Swift J1658.2-4242 are of an extreme variety, exhibiting flux differences of up to 77% within 100 s, which is much larger than what has been seen previously. We observed radical changes in the PDS simultaneous with the sharp flux variations, featuring transitions between the quasi-periodic oscillation types C and A, which have never been observed before. Changes in the PDS are delayed, but more rapid than changes in the light curve. Flip-flops occur in two intervals within the outburst, separated by about two weeks in which these phenomena were not seen. Transitions between the two flip-flop states occurred at random integer multiples of a fundamental period of 2.761 ks in the first interval and 2.61 ks in the second. Spectral analysis reveals the high and low flux flip-flop states to be very similar, but distinct from intervals lacking flip-flops. A change of the inner temperature of the accretion disc is responsible for most of the flux difference in the flip-flops. We also highlight the importance of correcting for the influence of the dust scattering halo on the X-ray spectra.

Texture Classification in Extreme Scale Variations Using GANet 期刊论文 OAI收割
IEEE TRANSACTIONS ON IMAGE PROCESSING, 2019, 卷号: 28, 期号: 8, 页码: 3910-3922
作者: Chen, Xilin; Liu, Li; Chen, Jie; Zhao, Guoying; Fieguth, Paul

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收藏 | 浏览/下载：61/0 | 提交时间：2019/08/16

Texture descriptors rotation invariance local binary pattern (LBP) feature extraction texture analysis

Spotting micro-expressions on long videos sequences 会议论文 OAI收割
Lille, France, May 14, 2019 - May 18, 2019
作者: Li, Jingting; Soladié, Catherine; Séguier, Renaud; Wang, Su-Jing; Yap, Moi Hoon

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收藏 | 浏览/下载：65/0 | 提交时间：2019/11/08

Baseline results - Cross validation - Facial movements - Feature differences - Local binary patterns - Micro-expressions - Temporal pattern - Temporal windows