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14,353 papers

#machine learning Preprint Open access Oct 2026

Lesion-DDPM: Lesion-Enhanced 3D Diffusion for MS MRI Synthesis

3D FLAIR MRI is widely recommended as one of the standard MRI sequences for brain imaging in multiple sclerosis (MS), but publicly available MS datasets remain relatively small and vary across scanners, acquisition protocols, and lesion patterns. This scarcity and variability hinder the development of robust neuroimagi...

Weidong Zhang, Yongchan Jung, Shafayat Mowla Anik et al. · 0 citations
#machine learning Preprint Open access Oct 2026

Unsupervised Identification and Removal of Spurious Correlations During Fine-Tuning

Fine-tuning a pretrained language model on a curated dataset can produce spurious correlations between the fine-tuning task and unintended latent factors---such as misaligned personas or political slant---that the curation procedure has entangled with the task. The model can latch onto these spurious correlations, lead...

Ciar\'an M. Gilligan-Lee, Joseph Egan, Yuchen Zhu et al. · 0 citations
#machine learning Preprint Open access Oct 2026

Is TabPFN the Silver Bullet for Insurance Pricing?

Modelling claim frequency and severity for non-life insurance pricing predominantly relies on generalised linear models (GLMs), with gradient-boosted machines as the leading machine learning alternative. Tabular foundation models (TFMs) present a fundamentally different inference paradigm. By pre-training on large coll...

Bruno Deprez, Wouter Verbeke, Tim Verdonck · 0 citations
#machine learning Preprint Open access Oct 2026

Cross-View Attention Fusion Net: A Prior-Guided Dual-View Representation Learning for Cardiac Output Estimation from Short-Term PPG Signals

Accurate cardiac output (CO) estimation from photoplethysmography (PPG) is promising for unobtrusive hemodynamic monitoring, but remains difficult since CO is jointly determined by cardiac function and vascular tone. Conventional feature-based models use physiologically meaningful PPG descriptors, yet depend on accurat...

Yaowen Zhang, Bo Cui, Libera Fresiello et al. · 0 citations
#machine learning Preprint Open access Oct 2026

Stochastic Compositional Optimization via Hybrid Momentum Frank--Wolfe

Stochastic compositional optimization minimizes $F(f(x), x)$ over a compact convex set when the inner map $f$ is available only through noisy samples. We propose Hybrid Momentum Stochastic Frank--Wolfe, a projection-free method for outer functions $F$ that are jointly convex and Lipschitz but not necessarily differenti...

El Mahdi Chayti, Mohamad Fakhouri · 0 citations
#machine learning Preprint Open access Oct 2026

Vision2Code: A Multi-Domain Benchmark for Evaluating Image-to-Code Generation

We study whether vision-language models (VLMs) can reconstruct structured, graphics-based images by writing executable code to generate them. Existing benchmarks on image-to-code generation are generally limited in the domains they cover, rely on reference source code for evaluation, and do not provide metrics to quant...

Ajay Vikram Periasami, Junlin Wang, Bhuwan Dhingra · 0 citations
#machine learning Preprint Open access Oct 2026

Fairness-Guided DQN-Based TXOP Control for NR-U/Wi-Fi Coexistence

New Radio operating in unlicensed spectrum (NR-U) and Wi-Fi employ different contention parameters and channel-occupancy durations, which can produce severe coexistence imbalance. This correspondence develops a fairness-guided deep Q-network (DQN) that adjusts the NR-U transmission opportunity (TXOP) using the observed...

Po-Heng Chou, Yi-Fang Yu, Shou-Yu Chen et al. · 0 citations
#machine learning Preprint Open access Oct 2026

Occam's Razor is Only as Sharp as Your ELBO

The marginal likelihood, also known as the evidence, is regarded as a mathematical embodiment of Occam's razor, enabling hyperparameter selection that avoids overfitting. The evidence lower bound (ELBO) objective from variational inference has also been used for similar purposes. In this paper, we define a signal-to-no...

Ethan Harvey, Geoff Pleiss, Michael C. Hughes · 0 citations
#machine learning Preprint Open access Oct 2026

MVNN: A Measure-Valued Neural Network for Learning McKean-Vlasov Dynamics from Particle Data

Collective behaviors that emerge from interactions are fundamental to numerous biological systems. To learn such interacting forces from observations, we introduce a measure-valued neural network that infers measure-dependent interaction (drift) terms directly from particle-trajectory observations. The proposed archite...

Liyao Lyu, Xinyue Yu, Hayden Schaeffer · 0 citations
#machine learning Preprint Open access Oct 2026

Locally Private Parametric Methods for Change-Point Detection

We study parametric change-point detection under local differential privacy, focusing on the offline localization of a single change point in a sequence of independent observations.~In the non-private setting, we derive improved finite-sample accuracy guarantees for a generalized likelihood-ratio estimator using martin...

Anuj Kumar Yadav, Cemre Cadir, Yanina Y. Shkel et al. · 0 citations
#machine learning Preprint Open access Oct 2026

RanSOM: Second-Order Momentum with Randomized Scaling for Constrained and Unconstrained Optimization

Second-order momentum corrects the lag of momentum behind the current gradient with a Hessian-vector product (HVP), but existing corrections need either a Lipschitz Hessian or extra forward and backward passes at an auxiliary point. We show that randomizing the step length removes this trade-off: if the step is exponen...

El Mahdi Chayti, Mohamad Fakhouri · 0 citations
#machine learning Preprint Open access Oct 2026

Fast Rates for Nonstationary Weighted Risk Minimization

Weighted empirical risk minimization is a common approach to prediction under distribution drift. This article studies its out-of-sample prediction error under nonstationarity. We provide a general decomposition of the excess risk into a learning term and an error term associated with distribution drift, and prove orac...

Tobias Brock, Thomas Nagler · 0 citations

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Microsoft Research Blog Oct 12, 2026

Simulating student learning for better AI tutoring

StudentSim is a research system for evaluating and improving AI tutoring tools before they are tested with learners. It models how individuals may engage with tutors, giving feedback to improve tutor performance across subjects like chess, writing, and mathematics. The post Simulating student learning for better AI tutoring appeared first on Microsoft Research.

MIT News · Artificial Intelligence Oct 7, 2026

Discovering the value of humanistic inquiry

Students in MIT’s Concourse program delve deeply into the human condition, debate challenging questions, and learn to develop judgment about issues that can’t be quantified.

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