Search Results for author: Andi Zhang

Found 11 papers, 1 papers with code

Your Finetuned Large Language Model is Already a Powerful Out-of-distribution Detector

no code implementations7 Apr 2024 Andi Zhang, Tim Z. Xiao, Weiyang Liu, Robert Bamler, Damon Wischik

We revisit the likelihood ratio between a pretrained large language model (LLM) and its finetuned variant as a criterion for out-of-distribution (OOD) detection.

Language Modelling Large Language Model +3

Falsehoods that ML researchers believe about OOD detection

no code implementations23 Oct 2022 Andi Zhang, Damon Wischik

An intuitive way to detect out-of-distribution (OOD) data is via the density function of a fitted probabilistic generative model: points with low density may be classed as OOD.

Out of Distribution (OOD) Detection

Out-of-Distribution Detection with Class Ratio Estimation

no code implementations8 Jun 2022 Mingtian Zhang, Andi Zhang, Tim Z. Xiao, Yitong Sun, Steven McDonagh

In this work, we propose to unify density ratio based methods under a novel framework that builds energy-based models and employs differing base distributions.

Out-of-Distribution Detection Out of Distribution (OOD) Detection

A Dual-fusion Semantic Segmentation Framework With GAN For SAR Images

no code implementations2 Jun 2022 Donghui Li, Jia Liu, Fang Liu, Wenhua Zhang, Andi Zhang, Wenfei Gao, Jiao Shi

With the better representation capability of optical images, we propose to enrich SAR images with generated optical images via the generative adversative network (GAN) trained by numerous SAR and optical images.

Image Segmentation Segmentation +1

On the Out-of-distribution Generalization of Probabilistic Image Modelling

2 code implementations NeurIPS 2021 Mingtian Zhang, Andi Zhang, Steven McDonagh

Out-of-distribution (OOD) detection and lossless compression constitute two problems that can be solved by the training of probabilistic models on a first dataset with subsequent likelihood evaluation on a second dataset, where data distributions differ.

Out-of-Distribution Generalization Out of Distribution (OOD) Detection

Memory-augmented Neural Machine Translation

no code implementations EMNLP 2017 Yang Feng, Shiyue Zhang, Andi Zhang, Dong Wang, Andrew Abel

Neural machine translation (NMT) has achieved notable success in recent times, however it is also widely recognized that this approach has limitations with handling infrequent words and word pairs.

Machine Translation NMT +1

Flexible and Creative Chinese Poetry Generation Using Neural Memory

no code implementations ACL 2017 Jiyuan Zhang, Yang Feng, Dong Wang, Yang Wang, Andrew Abel, Shiyue Zhang, Andi Zhang

It has been shown that Chinese poems can be successfully generated by sequence-to-sequence neural models, particularly with the attention mechanism.

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