中国科学院机构知识库网格系统: 检索

Bayesian Network Structure Learning Approach Based on Searching Local Structure of Strongly Connected Components 期刊论文 OAI收割
IEEE ACCESS, 2022, 卷号: 10, 页码: 67630-67638
作者: Zhong, Kunhua; Chen, Yuwen; Zhang, Ju; Qin, Xiaolin

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收藏 | 浏览/下载：35/0 | 提交时间：2022/08/22

Bayes methods Approximation algorithms Search problems Directed graphs Heuristic algorithms Periodic structures Random variables Bayesian network structure learning hill climbing search strongly connected component

One-Shot Neural Architecture Search: Maximising Diversity to Overcome Catastrophic Forgetting 期刊论文 OAI收割
IEEE TRANSACTIONS ON PATTERN ANALYSIS AND MACHINE INTELLIGENCE, 2021, 卷号: 43, 期号: 9, 页码: 2921-2935
作者: Zhang, Miao; Li, Huiqi; Pan, Shirui; Chang, Xiaojun; Zhou, Chuan

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收藏 | 浏览/下载：72/0 | 提交时间：2021/10/26

Computer architecture Training Optimization Neural networks Search methods Australia Germanium AutoML neural architecture search continual learning catastrophic forgetting novelty search

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：28/0 | 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).

Large dynamic range Shack–Hartmann wavefront measurement based on image segmentation and a neighbouring-region search algorithm 期刊论文 OAI收割
Optics Communications, 2019, 卷号: 450, 页码: 190-201
作者: Gao, Zeyu; Li, Xinyang; Ye, Hongwei

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收藏 | 浏览/下载：30/0 | 提交时间：2021/05/06

Shack-Hartmann wavefront sensor Dynamic range Wavefront measurement Centroiding methods Image segmentation Search algorithm

Improvement of correlation-based centroiding methods for point source Shack-Hartmann wavefront sensor 期刊论文 OAI收割
OPTICS COMMUNICATIONS, 2018, 卷号: 411, 页码: 187-194
作者: Li, Xuxu; Li, Xinyang; wang, Caixia

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收藏 | 浏览/下载：34/0 | 提交时间：2019/08/23

Shack-Hartmann wavefront sensor Centroiding methods Correlation methods Point source Fast search algorithms

Detection of hyperspectral small targets based on projection pursuit optimized by bee colony 期刊论文 OAI收割
yi qi yi biao xue bao/chinese journal of scientific instrument, 2016, 卷号: 37, 期号: 6, 页码: 1347-1355
作者: Wu, Yiquan; Zhou, Yang; Long, Yunlin

收藏 | 浏览/下载：34/0 | 提交时间：2016/10/12

Algorithms Discriminant analysis Evolutionary algorithms Higher order statistics Image analysis Image processing Image reconstruction Independent component analysis Motion compensation Nearest neighbor search Optimization Particle swarm optimization (PSO) Pixels Principal component analysis Remote sensing Spectroscopy Statistical methods

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

Features extraction and matching of teeth image based on the SIFT algorithm (EI CONFERENCE) 会议论文 OAI收割
2012 2nd International Conference on Computer Application and System Modeling, ICCASM 2012, July 27, 2012 - July 29, 2012, Shenyang, China
作者: Wang X.; Wang X.; Wang X.

收藏 | 浏览/下载：36/0 | 提交时间：2013/03/25

Using of SIFT algorithm in the image of teeth model can detect the features of the teeth image effectively. In this approach first search over all scales and image locations by using a difference-of-Gaussian function to identify potential interest points that are invariant to scale and orientation. Second select keypoints based on measures of their stability and a detailed model is fit to determine location and scale at each candidate location. Third assign one or more orientations to each keypoint location based on local image gradient directions. Last measure the local image gradients at the selected scale in the region around each keypoint. And then use the KNN algorithm to match the features. Through lots of experiments and comparing with other feature extraction methods this method can detect the features of the teeth model effectively and offer some available parameters for 3D reconstruction of the teeth model. the authors.

Personalized Search Strategies for Spatial Information on the Web 期刊论文 OAI收割
IEEE INTELLIGENT SYSTEMS, 2012, 卷号: 27, 期号: 1, 页码: 12-20
作者: Yang, Yanwu

收藏 | 浏览/下载：27/0 | 提交时间：2015/08/12

Semantics Intelligent systems Search methods Taxonomy Search engines Web search Information retrieval Spatial coherence spatial information retrieval personalized search spatial web personalization spatial proximity

Optimal design of a 7 T highly homogeneous superconducting magnet for a Penning trap 期刊论文 OAI收割
CHINESE PHYSICS C, 2010, 卷号: 34, 期号: 7, 页码: 978-982
作者:

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收藏 | 浏览/下载：18/0 | 提交时间：2011/04/20

Penning trap linear programming magnet design nonlinear optimization methods pattern search