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Session-based recommendation systems(SBRS) are more suitable for the current e-commerce and streaming media recommendation scenarios and thus have become a hot topic. The data encountered by SBRS is typically highly sparse, which also…

信息检索 · 计算机科学 2023-08-31 Zihan Wang , Gang Wu , Haotong Wang

Contrastive pretraining is well-known to improve downstream task performance and model generalisation, especially in limited label settings. However, it is sensitive to the choice of augmentation pipeline. Positive pairs should preserve…

计算机视觉与模式识别 · 计算机科学 2025-06-17 Melanie Roschewitz , Fabio De Sousa Ribeiro , Tian Xia , Galvin Khara , Ben Glocker

The increasing penetration of photovoltaic systems in the power grid makes it vulnerable to cloud shadow projection. Real-time cloud segmentation in ground-based infrared images is important to reduce the noise in intra-hour global solar…

图像与视频处理 · 电气工程与系统科学 2021-05-28 Guillermo Terrén-Serrano , Manel Martínez-Ramón

Recently, various contrastive learning techniques have been developed to categorize time series data and exhibit promising performance. A general paradigm is to utilize appropriate augmentations and construct feasible positive samples such…

机器学习 · 计算机科学 2024-10-11 Qianying Ren , Dongsheng Luo , Dongjin Song

Decades of in-situ solar wind measurements have clearly established the variation of solar wind physical parameters. These variable parameters have been used to classify the solar wind magnetized plasma into different types leading to…

太阳与恒星天体物理 · 物理学 2024-09-17 Tom Narock , Sanchita Pal , Aryana Arsham , Ayris Narock , Teresa Nieves-Chinchilla

A two-stage training paradigm consisting of sequential pre-training and meta-training stages has been widely used in current few-shot learning (FSL) research. Many of these methods use self-supervised learning and contrastive learning to…

计算机视觉与模式识别 · 计算机科学 2022-09-20 Zhanyuan Yang , Jinghua Wang , Yingying Zhu

Among the eruptive activity phenomena observed on the Sun, the most technology threatening ones are flares with associated coronal mass ejections (CMEs) and solar energetic particles (SEPs). Flares with associated CMEs and SEPs are produced…

Solar energetic particle (SEP) events pose severe threats to spacecraft, astronaut safety, and aviation operations. Accurate SEP forecasting remains a critical challenge in space weather research due to their complex origins and highly…

空间物理 · 物理学 2026-05-04 Yian Yu , Yang Chen , Lulu Zhao , Kathryn Whitman , Ward Manchester , Tamas Gombosi

In this paper, we introduce a novel method designed to enhance label efficiency in satellite imagery analysis by integrating semi-supervised learning (SSL) with active learning strategies. Our approach utilizes contrastive learning together…

计算机视觉与模式识别 · 计算机科学 2024-06-26 David Pogorzelski , Peter Arlinghaus , Wenyan Zhang

A deep learning network, Long-Short Term Memory (LSTM) network, is used in this work to predict whether the maximum flare class an active region (AR) will produce in the next 24 hours is class $\Gamma$. We considered $\Gamma$ are $\ge M$,…

太阳与恒星天体物理 · 物理学 2020-05-27 Xiantong Wang , Yang Chen , Gabor Toth , Ward B. Manchester , Tamas I. Gombosi , Alfred O. Hero , Zhenbang Jiao , Hu Sun , Meng Jin , Yang Liu

Contrastive Learning (CL) performances as a rising approach to address the challenge of sparse and noisy recommendation data. Although having achieved promising results, most existing CL methods only perform either hand-crafted data or…

信息检索 · 计算机科学 2023-11-22 Xiuyuan Qin , Huanhuan Yuan , Pengpeng Zhao , Junhua Fang , Fuzhen Zhuang , Guanfeng Liu , Victor Sheng

Solar flares commonly have a hot onset precursor event" (HOPE), detectable from soft X-ray observations. Detecting this requires subtraction of pre-flare fluxes from the non-flaring Sun prior to the event, fitting an isothermal emission…

太阳与恒星天体物理 · 物理学 2024-07-08 Hugh S. Hudson

Long-term forecasting presents unique challenges due to the time and memory complexity of handling long sequences. Existing methods, which rely on sliding windows to process long sequences, struggle to effectively capture long-term…

机器学习 · 计算机科学 2024-03-26 Junwoo Park , Daehoon Gwak , Jaegul Choo , Edward Choi

Citrus, as one of the most economically important fruit crops globally, suffers severe yield depressions due to various diseases. Accurate disease detection and classification serve as critical prerequisites for implementing targeted…

计算机视觉与模式识别 · 计算机科学 2025-07-16 Jun Chen , Yonghua Yu , Weifu Li , Yaohui Chen , Hong Chen

Solar radio observation is an important way to study the Sun. Solar radio bursts contain important information about solar activity. Therefore, real-time automatic detection and classification of solar radio bursts are of great value for…

天体物理仪器与方法 · 物理学 2025-02-07 Siqi Li , Guowu Yuan , Jian Chen , Chengming Tan , Hao Zhou

We investigate the use of Long Short-Term Memory (LSTM) and Decomposition-LSTM (DLSTM) networks, combined with an ensemble algorithm, to predict solar flare occurrences using time-series data from the GOES catalog. The dataset spans from…

机器学习 · 计算机科学 2025-09-18 Zeinab Hassani , Davud Mohammadpur , Hossein Safari

The field of generating recommendations within the framework of causal inference has seen a recent surge, with recommendations being likened to treatments. This approach enhances insights into the influence of recommendations on user…

信息检索 · 计算机科学 2023-08-21 Guanglin Zhou , Chengkai Huang , Xiaocong Chen , Xiwei Xu , Chen Wang , Liming Zhu , Lina Yao

We present the results from the first ensemble prediction model for major solar flares (M and X classes). The primary aim of this investigation is to explore the construction of an ensemble for an initial prototyping of this new concept.…

空间物理 · 物理学 2016-01-20 J. A. Guerra , A. Pulkkinen , V. M. Uritsky

The existing flare prediction primarily relies on photospheric magnetic field parameters from the entire active region (AR), such as Space-Weather HMI Activity Region Patches (SHARP) parameters. However, these parameters may not capture the…

太阳与恒星天体物理 · 物理学 2024-10-28 Xuebao Li , Xuefeng Li , Yanfang Zheng , Ting Li , Pengchao Yan , Hongwei Ye , Shunhuang Zhang , Xiaotian Wang , Yongshang Lv , Xusheng Huang

Solar flares are driven by release of the free magnetic energy and its conversion to other forms of energy -- kinetic, thermal, and nonthermal. Quantification of partitions between these energy components and their evolution is needed to…

太阳与恒星天体物理 · 物理学 2023-08-02 Gregory D. Fleishman , Gelu M. Nita , Galina G. Motorina