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The impact of the El Ni\~no-Southern Oscillation (ENSO) on the extratropics is investigated in an idealized, reduced-order model that has a tropical and an extratropical module. Unidirectional ENSO forcing is used to mimick the atmospheric…

大气与海洋物理 · 物理学 2021-07-07 Stéphane Vannitsem , Jonathan Demaeyer , Michael Ghil

We introduce a scaling strategy for Explicit Policy-Conditioned Value Functions (EPVFs) that significantly improves performance on challenging continuous-control tasks. EPVFs learn a value function V({\theta}) that is explicitly conditioned…

机器学习 · 计算机科学 2025-02-18 Nico Bohlinger , Jan Peters

Reinforcement learning for control over continuous spaces typically uses high-entropy stochastic policies, such as Gaussian distributions, for local exploration and estimating policy gradient to optimize performance. Many robotic control…

机器学习 · 计算机科学 2024-04-03 Ya-Chien Chang , Sicun Gao

Accurate long-range forecasting of the El \Nino-Southern Oscillation (ENSO) is vital for global climate prediction and disaster risk management. Yet, limited understanding of ENSO's physical mechanisms constrains both numerical and deep…

We aim to analyze the behaviour of a finite-time stochastic system, whose model is not available, in the context of more rare and harmful outcomes. Standard estimators are not effective in making predictions about such outcomes due to their…

统计方法学 · 统计学 2022-07-29 Evan Arsenault , Yuheng Wang , Margaret P. Chapman

In Earth sciences, unobserved factors exhibit non-stationary spatial distributions, causing the relationships between features and targets to display spatial heterogeneity. In geographic machine learning tasks, conventional statistical…

计算机视觉与模式识别 · 计算机科学 2025-02-11 Siqi Du , Hongsheng Huang , Kaixin Shen , Ziqi Liu , Shengjun Tang

Accurately quantifying uncertainty in predictions and projections arising from irreducible internal climate variability is critical for informed decision making. Such uncertainty is typically assessed using ensembles produced with physics…

机器学习 · 计算机科学 2026-02-09 Parsa Gooya , Reinel Sospedra-Alfonso , Johannes Exenberger

Accurate forecasting is important for cost-effective and efficient monitoring and control of the renewable energy based power generation. Wind based power is one of the most difficult energy to predict accurately, due to the widely varying…

计算工程、金融与科学 · 计算机科学 2016-11-17 Adnan Anwar , Abdun Naser Mahmood

Wind farms can be regarded as complex systems that are, on the one hand, coupled to the nonlinear, stochastic characteristics of weather and, on the other hand, strongly influenced by supervisory control mechanisms. One crucial problem in…

应用统计 · 统计学 2021-01-22 Tobias Braun , Matthias Waechter , Joachim Peinke , Thomas Guhr

Weather forecasting is a crucial task for meteorologic research, with direct social and economic impacts. Recently, data-driven weather forecasting models based on deep learning have shown great potential, achieving superior performance…

大气与海洋物理 · 物理学 2024-08-26 Lihao Gan , Xin Man , Chenghong Zhang , Jie Shao

Reinforcement Learning with Verifiable Rewards (RLVR) has emerged as an important paradigm for unlocking reasoning capabilities in large language models, exemplified by the success of OpenAI o1 and DeepSeek-R1. Currently, Group Relative…

机器学习 · 计算机科学 2026-01-08 Shijie Zhang , Kevin Zhang , Zheyuan Gu , Xiang Guo , Rujun Guo , Shaoyu Liu , Guanjun Jiang , Xiaozhao Wang

The growing complexity of Edge Video Analytics (EVA) facilitates new kind of intelligent applications, but creates challenges in real-time inference serving systems. State-of-the-art (SOTA) scheduling systems optimize global workload…

分布式、并行与集群计算 · 计算机科学 2025-07-25 Lucas Liebe , Thanh-Tung Nguyen , Dongman Lee

Increasing climate change and habitat loss are driving unprecedented shifts in species distributions. Conservation professionals urgently need timely, high-resolution predictions of biodiversity risks, especially in ecologically diverse…

定量方法 · 定量生物学 2025-12-03 Hammed A. Akande , Abdulrauf A. Gidado

Short-term forecasting models typically assume the availability of input data (features) when they are deployed and in use. However, equipment failures, disruptions, cyberattacks, may lead to missing features when such models are used…

机器学习 · 统计学 2025-06-30 Akylas Stratigakos , Panagiotis Andrianesis

Due to the non-stationary nature, the distribution of real-world multivariate time series (MTS) changes over time, which is known as distribution drift. Most existing MTS forecasting models greatly suffer from distribution drift and degrade…

机器学习 · 计算机科学 2024-04-03 Hui He , Qi Zhang , Kun Yi , Kaize Shi , Zhendong Niu , Longbing Cao

Decision-makers rely on weather forecasts to plant crops, manage wildfires, allocate water and energy, and prepare for weather extremes. Today, such forecasts enjoy unprecedented accuracy out to two weeks thanks to steady advances in…

Time series forecasting underpins vital decision-making across various sectors, yet raw predictions from sophisticated models often harbor systematic errors and biases. We examine the Forecast-Then-Optimize (FTO) framework, pioneering its…

机器学习 · 计算机科学 2025-06-17 Jinhang Jiang , Nan Wu , Ben Liu , Mei Feng , Xin Ji , Karthik Srinivasan

In the past decades, clean and renewable energy has gained increasing attention due to a global effort on carbon footprint reduction. In particular, Saudi Arabia is gradually shifting its energy portfolio from an exclusive use of oil to a…

机器学习 · 统计学 2024-12-11 Kesen Wang , Minwoo Kim , Stefano Castruccio , Marc G. Genton

For the purpose of Monte Carlo scenario generation, we propose a graphical model for the joint distribution of wind power and electricity demand in a given region. To conform with the practice in the electric power industry, we assume that…

统计方法学 · 统计学 2021-11-30 René Carmona , Xinshuo Yang

Hybrid training methods for large language models combine supervised fine tuning (SFT) on expert demonstrations with reinforcement learning (RL) on model rollouts, typically at the sample level. We propose Entropy Gated Selective Policy…

机器学习 · 计算机科学 2026-02-04 Yuelin Hu , Zhengxue Cheng , Wei Liu , Li Song