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

Decoupling Error Attribution in Cloud-Native Graph-RAG: A Data Integrity Diagnostic Framework

The paper introduces a three‑layer diagnostic framework that separates errors in Graph‑RAG systems into reasoning loss, Knowledge Graph defects, and Cypher generation errors. Experiments on a spatio‑temporal ecological KG from southeastern Tibet show that data integrity issues, especially structural defects, are the main cause of performance drops, reducing accuracy from 0.93 to 0.39. The study also identifies a Parametric Knowledge Masking Effect where LLMs hide retrieval path failures, masking over 70 % of query generation errors and raising the risk of false negatives in automated monitoring.

By Shuai Yan, Yuhang Wu, Xiaodong Huang, Ke Wang
arXiv AI
Sep 15

Adaptive Conformal Redistribution for Inter-class Transitional Uncertainty in Medical Image Classification

The paper introduces AdaConRed, a label‑free post‑conformal decision rule that transforms ambiguous conformal prediction sets into single class assignments for medical image classification. It employs a five‑stage pipeline—vision‑language generative augmentation, a frozen DermFoundation encoder, a lightweight MLP classifier, an entropy‑modulated margin‑aware nonconformity score, and a reassignment step for transitional samples—to improve accuracy on OSCC and ISIC benchmarks. Results show notable gains in malignant class accuracy while maintaining overall performance.

By Saibal Ghosh, Samarup Bhattacharya, Sanjoy Kumar Saha, Umapada Pal, Tapabrata Chakraborti
arXiv AI
Sep 15

ProtoCAM: Interpretable Few-Shot Mask-Guided Prototypical Learning for Breast Lesion Classification in Ultrasound Imaging

ProtoCAM is an explainable few‑shot learning framework for classifying breast lesions in ultrasound images. It combines mask‑guided feature encoding, prototypical metric learning, and gradient‑based visual explanations to leverage limited annotated data. Evaluated on the BUSI dataset, ProtoCAM achieved a macro F1‑score of 0.910 in a 3‑way 5‑shot setting, outperforming standard supervised CNNs, with ResNet18 reaching 91.65% under 15‑shot conditions.

By Ashkan Ebadi
arXiv AI
Sep 15

Empirical Evaluation of Open-Source Large Language Models for Retrieval-Augmented Generation in ESG Domain

The paper evaluates seven open‑source large language models for retrieval‑augmented generation in the ESG reporting domain, using 498 real‑world ESG reports from EU‑listed companies and 100 synthetic QA pairs. Performance is measured with RAGAS metrics, showing strong retrieval scores but variable generation quality, especially in faithfulness and factual correctness. The results highlight significant differences across model architectures and underscore the need for domain‑specific fine‑tuning to improve factual accuracy.

By Motaz Saad, Anna Borrelli, Ivan Gentile, Kianna Kazemi, Francesco Piccialli, Antonella Longo
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

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 AI
Sep 15

Multimodal-Multiresolution Foundation Model for Lunar Remote Sensing

The paper introduces a multimodal foundation model for lunar remote sensing, trained from scratch on SomBench—a dataset of nearly two million co‑registered tile bundles across 11 modalities at 1 m and 100 m resolutions. The model extends the TerraMind masked‑token architecture with lunar‑specific features such as explicit acquisition geometry and joint training of two spatial scales, and employs FlexiViT patch embeddings for adaptable patch sizes. Evaluation on crater detection, irregular mare patch segmentation, and polar ice prospectivity regression shows that the pretrained model matches or surpasses ImageNet‑pretrained baselines, with notable label efficiency and effective adaptation via LoRA.

By Paolo Fraccaro, Gabby Nyirjesy, Daniela Szwarcman, Himanshu Patil, Vishal Gaur, Rohit Lal, Rachel A. Slank, Geoffrey Dawson, Hiyam Debary, Michael K. Barker, Andrew Annex, Vishnu Viswanathan, Zachary Morse, Ethan I. Schaefer, Nikolaos Dionelis, Ankur Kumar, Campbell D. Watson, Manil Maskey, Rebekah I. Dawson-Rigas, Juan Bernab\'e-Moreno, Rahul Ramachandran, Sujit Roy