الباحثون

Naren Ramakrishnan

المنشورات 6

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Overcoming Prior Barriers: Supervised Fine-Tuning under Long-Tail Distribution

Haohui Wang, Jiahao Xu, Wangzhi Zhan وآخرون · 2026

Supervised fine-tuning (SFT) adapts pretrained large language models (LLMs) to downstream tasks, but the required concepts can receive substantially different levels of pretrained support. Frequent concepts are more likely to be well learned, whereas rare concepts may remain weakly represented. We introduce a novel not …

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DOGS: Design-Space Sampling for Prompt-Driven Logo Generation

Ganyu Zou, Chen Dai, Nathan Self وآخرون · 2026

Prompt optimization for text-to-image (T2I) generation has been pursued almost entirely as text rewriting, in which a short user brief is expanded into a longer, model-preferred token sequence. We argue that such a language-space formulation is ill-suited to structured visual design tasks such as logo creation, where a …

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Compositional Concept Erasure in Text-to-Image Diffusion Models via Hierarchically Grounded Semantic Surgery

Chen Dai, Ganyu Zou, Nathan Self وآخرون · 2026

Removing copyrighted, unsafe, or user-specified concepts from a deployed text-to-image diffusion model is now a practical requirement. Weight-editing methods can suppress fixed targets, but they require per-target retraining and modify the model checkpoint. Training-free methods, on the other hand, are deployment-frien …

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EpiWorld: Grounding LLM Policy Agents in Epidemiological World Models

Zeeshan Memon, Yiqi Su, Kai Shu وآخرون · 2026

Epidemic intervention policies are textual artefacts that human decision-makers interpret, justify, and revise through natural language, making large language models a natural candidate for epidemic policy reasoning. A naive LLM, however, lacks the epidemic dynamics needed to project intervention consequences, the quan …

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DataWeave: Deploying Human-LLM Analytics for Exploratory Structured Data Analysis

Data journalism, the practice of using data analysis to surface newsworthy stories, depends increasingly on the ability of reporters and investigative journalists to uncover trends, disparities, and accountability narratives. In practice, exploring large structured datasets remains slow and brittle: journalists must na …

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Graph World Models for Constrained Epidemic Policy Planning

Yiqi Su, Rashed Shelim, Lingyi Wang وآخرون · 2026

Epidemic policy planning often requires coordination between geographical regions, taking into account mobility-driven spillovers and how to make use of limited resources. Existing methods either lack action-conditioned models of coupled dynamics or cannot guarantee per-period feasibility. We present EpiMind, a graph w …

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