Retrieval-augmented generation

Retrieval pipelines, vector search, chunking and reranking: how models are grounded in a corpus instead of their weights.

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arXiv AI
Sep 15

Diversified and Perceptible Counterfactual Examples Leveraging Expert Knowledge

The paper introduces DiCEf, a variant of the DiCE counterfactual example generator that incorporates expert knowledge expressed as a fuzzy linguistic vocabulary. By embedding continuous data into this linguistic domain, DiCEf personalises counterfactual explanations to be linguistically perceptible while maintaining minimal cost, sparsity, and diversity. Experimental results on a real‑world dataset demonstrate that this approach yields semantically meaningful counterfactuals for the explainee.

By Akram Bensalem (IMT Atlantique - INFO), Fahima Djelil (Lab-STICC\_MOTEL, IMT Atlantique - INFO), Marie-Jeanne Lesot (IMT Atlantique - INFO, Lab-STICC, Lab-STICC\_MOTEL), Gr{\'e}gory Smits (IMT Atlantique - INFO, Lab-STICC, Lab-STICC\_MOTEL)
arXiv Computer Vision
Sep 15

Reliable Egocentric Action Anticipation via Temporal Reliability Suppression and Compositional Graph Decoding

The paper presents a lightweight framework for reliable egocentric action anticipation that tackles two failure modes caused by temporal corruption: unreliable temporal evidence during encoding and implausible verb‑noun compositions during decoding. It introduces Temporal Reliability Suppression (TRS), which predicts per‑frame suppression scores to penalize encoder attention and weight temporal pooling, and Robust Verb‑Noun Graph (RVG), which re‑ranks verb‑noun pairs using a PMI‑based compatibility graph derived from training labels. Experiments with corruption‑augmented training show that TRS+CA+RVG achieves 29.1% average corrupted accuracy and 88.2% relative robustness across six corruptions, while dramatically reducing rare verb‑noun predictions from 15.4% to 1.1%. whyItMatters":"The approach improves the robustness of wearable action anticipation systems to real‑world challenges such as missing frames, masking, and sensor noise, which are common in egocentric video settings."

By Mahsa Mohammadi, Sareh Rowlands
arXiv Computer Vision
Sep 15

Weakly Supervised Spatial Grounding for Discriminative Attention-Based Ultrasound-Histopathology Alignment in Prostate Cancer Grading

arXiv:2609.15150v1 Announce Type: new Abstract: Unpaired cross-modal distillation transfers grade structure from histopathology into a micro-ultrasound (micro-US) encoder by aligning a pooled needle-...

By Obed Korshie Dzikunu, Emma Willis, Mohammad Mahdi Abootorabi, Mohamed Harmanani, Zhuoxin Guo, Ferdinand Luger, Adam Kinnaird, Brian Wodlinger, Parvin Mousavi, Purang Abolmaesumi
arXiv AI
Sep 15

Dynamic Learning Solutions: A System for Personalized Educational Video Generation

Dynamic Learning Solutions is an automated pipeline that transforms NCERT textbook PDFs into interactive video explanations. Users upload a PDF and ask a question; the system retrieves relevant content, generates a multi-scene script, creates images with Stable Diffusion, animates them with DynamiCrafter, and adds synchronized narration via Google Text‑to‑Speech. The result is a coherent, textbook‑aligned video that turns static material into an engaging learning experience.

By Siddhanth Sridhar, Shreya Chaurasia, Baddela Sai Yaswantha Reddy, Deepak Parmar, Shylaja S S
arXiv Machine Learning
Sep 14

Physics-Informed Conformal Prediction: Embedding PDE Consistency into Distribution-Free Uncertainty Quantification for Neural Operators

Physics-Informed Conformal Prediction (PI‑CP) embeds PDE residuals into the nonconformity score of split conformal prediction, yielding distribution‑free prediction intervals with provable coverage that adapt spatially to physics violations. The method demonstrates consistent 89‑91% coverage across six physics scenarios, outperforming MC Dropout and Deep Ensembles, while Fourier Neural Operators (FNO) achieve superior accuracy over CNN and DeepONet. Additionally, the authors prove that FNO’s translation equivariance limits its ability to solve PDEs with Dirichlet boundary conditions, and show that adding coordinate channels can reduce error by up to 63×.

By Michael Chin
arXiv Computation and Language
Sep 14

Not All Speech Is Intent: Adaptive Self-Correcting Inference Layer for Post-ASR False Wake-Up

The paper introduces ASCIL, a post‑ASR correction framework that re‑evaluates wake‑up intent by combining acoustic embeddings, linguistic cues, device context, and past misclassifications. ASCIL interprets both implicit (hesitation, disengagement, silence) and explicit (cancellation, repetition) signals as noisy indicators of misclassification, enabling online pattern updates without manual annotation. On a proprietary dataset of 3,667 interactions, ASCIL reduces errors by up to 54.27% relative on a session‑disjoint subset and 24.39% at a 0.90 threshold, while adding less than 60 ms of latency and improving intentional acceptance rates.

By Preeti Saraswat, Divya Neelagiri, Anil Yadav
arXiv Machine Learning
Sep 14

Representation Before Training: A Practical Benchmark for Generative Medical Event Model Tokenization

The study benchmarks tokenization choices for generative medical event models, evaluating quantization granularity, reference-range anchoring, code–value fusion, numeric and temporal encodings, and native versus harmonized event representations. Using Llama and Qwen architectures, 156 models were trained and assessed on early hospitalization data, showing that fusing codes with value deciles and using event-order or admission-relative RoPE embeddings improved predictive performance. The Common Longitudinal Intensive Care Unit Data Format (CLIF) reduced token count by 30.8% while enhancing outcomes in most families.

By Inhyeok Lee, Luke Solo, Michael C. Burkhart, Bashar Ramadan, Sahil Sethi, Sarah Jabbour, William F. Parker, Brett K. Beaulieu-Jones