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相关论文: Solving the $H_{0}$ tension in $f(T)$ Gravity thro…

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With the rise of neural networks in various domains, multi-task learning (MTL) gained significant relevance. A key challenge in MTL is balancing individual task losses during neural network training to improve performance and efficiency…

机器学习 · 计算机科学 2024-08-16 Lukas Kirchdorfer , Cathrin Elich , Simon Kutsche , Heiner Stuckenschmidt , Lukas Schott , Jan M. Köhler

A new dynamic latent space eigenmodel (LSM) is proposed for weighted temporal networks. The model accommodates integer-valued weights, excess of zeros, time-varying node positions (features), and time-varying network sparsity. The latent…

统计方法学 · 统计学 2026-04-15 Roberto Casarin , Matteo Iacopini , Antonio Peruzzi

We present model independent reconstructions of quintessence and the Swampland conjectures (SC) using both Machine Learning (ML) and cosmography. In particular, we demonstrate how the synergies between theoretical analyses and ML can…

宇宙学与河外天体物理 · 物理学 2021-03-31 Rubén Arjona , Savvas Nesseris

One of the biggest challenges in cosmology, the Hubble Tension, requires independent measurements of $H_0$, and strong lensing with time-delay cosmography is a promising avenue. The inclusion of spatially resolved kinematic data helps break…

星系天体物理 · 物理学 2026-02-10 Vishal Verma , Quinn Minor

Datasets in engineering applications are often limited and contaminated, mainly due to unavoidable measurement noise and signal distortion. Thus, using conventional data-driven approaches to build a reliable discriminative model, and…

机器学习 · 统计学 2020-04-14 Xihaier Luo , Ahsan Kareem

The Hubble Tension is a well-known issue in modern cosmology that refers to the apparent disagreement in inferences of the Hubble constant $H_0$ as found through low-redshift observations and those derived from the $\Lambda$CDM model…

宇宙学与河外天体物理 · 物理学 2024-03-22 Joshua Ange , Joel Meyers

Time series prediction is challenging due to our limited understanding of the underlying dynamics. Conventional models such as ARIMA and Holt's linear trend model experience difficulty in identifying nonlinear patterns in time series. In…

统计方法学 · 统计学 2025-11-13 Thu Nguyen , Lam Si Tung Ho

Multi-task learning (MTL) considers learning a joint model for multiple tasks by optimizing a convex combination of all task losses. To solve the optimization problem, existing methods use an adaptive weight updating scheme, where task…

机器学习 · 计算机科学 2024-07-22 Yifei He , Shiji Zhou , Guojun Zhang , Hyokun Yun , Yi Xu , Belinda Zeng , Trishul Chilimbi , Han Zhao

The dominant uncertainty in the current measurement of the Hubble constant ($H_0$) with strong gravitational lensing time delays is attributed to uncertainties in the mass profiles of the main deflector galaxies. Strongly lensed supernovae…

宇宙学与河外天体物理 · 物理学 2022-01-12 Simon Birrer , Suhail Dhawan , Anowar J. Shajib

In recent years, the modified theory of gravity known as $f(Q)$ gravity has drawn interest as a potential alternative to general relativity. According to this theory, the gravitational force is determined by a function of the so-called…

广义相对论与量子宇宙学 · 物理学 2024-03-13 Pooja Vishwakarma , Parth Shah

Using a correspondence between the f(T)-gravity with the power-law entropy corrected version of the holographic dark energy model, we reconstruct the holographic f(T)-gravity model with power-law entropy correction. We fit the model…

广义相对论与量子宇宙学 · 物理学 2013-11-06 K. Karami , S. Asadzadeh , A. Abdolmaleki , Z. Safari

Fifth forces are ubiquitous in modified theories of gravity. In this paper, we analyze their effect on the Cepheid-calibrated cosmic distance ladder, specifically with respect to the inferred value of the Hubble constant ($H_0$). We…

宇宙学与河外天体物理 · 物理学 2023-09-06 Marcus Högås , Edvard Mörtsell

We search for viable f(R) theories of gravity, making use of the equivalence between such theories and scalar-tensor gravity. We find that models can be made consistent with solar system constraints either by giving the scalar a high mass…

天体物理学 · 物理学 2008-11-26 Thomas Faulkner , Max Tegmark , Emory F. Bunn , Yi Mao

Machine learning (ML) techniques applied to quantum many-body physics have emerged as a new research field. While the numerical power of this approach is undeniable, the most expressive ML algorithms, such as neural networks, are black…

量子物理 · 物理学 2021-11-25 Anna Dawid , Patrick Huembeli , Michał Tomza , Maciej Lewenstein , Alexandre Dauphin

Alterations of the gravity Lagrangian introduced in modified torsion gravity theories---also referred to as $f(T)$ gravity---allows for an accelerated expansion in a matter dominated Universe. In this framework, the cosmic speed up is…

宇宙学与河外天体物理 · 物理学 2014-04-23 Stefano Camera , Vincenzo F. Cardone , Ninfa Radicella

Science-based simulation tools such as Finite Element (FE) models are routinely used in scientific and engineering applications. While their success is strongly dependent on our understanding of underlying governing physical laws, they…

机器学习 · 计算机科学 2021-03-31 Navid Zobeiry , Anoush Poursartip

Strongly lensed supernovae are a promising new probe to obtain independent measurements of the Hubble constant (${H_0}$). In this work, we employ simulated gravitationally lensed Type Ia supernovae (glSNe Ia) to train our machine learning…

天体物理仪器与方法 · 物理学 2025-04-16 Gonçalo Gonçalves , Nikki Arendse , Doogesh Kodi Ramanah , Radosław Wojtak

Decaying dark matter models generically modify the equation of state around the time of dark matter decay, and this in turn modifies the expansion rate of the Universe through the Friedmann equation. Thus, a priori, these models could solve…

宇宙学与河外天体物理 · 物理学 2023-07-04 Andreas Nygaard , Emil Brinch Holm , Thomas Tram , Steen Hannestad

We investigate the application of hybrid quantum tensor networks to aeroelastic problems, harnessing the power of Quantum Machine Learning (QML). By combining tensor networks with variational quantum circuits, we demonstrate the potential…

Bayesian reinforcement learning (BRL) is a method that merges principles from Bayesian statistics and reinforcement learning to make optimal decisions in uncertain environments. As a model-based RL method, it has two key components: (1)…

机器学习 · 统计学 2025-06-03 Shreya Sinha Roy , Richard G. Everitt , Christian P. Robert , Ritabrata Dutta