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Direct Preference Optimization (DPO) have emerged as a popular method for aligning Large Language Models (LLMs) with human preferences. While DPO effectively preserves the relative ordering between chosen and rejected responses through…

Computation and Language · Computer Science 2025-06-05 Lin Sun , Chuang Liu , Peng Liu , Bingyang Li , Weijia Lu , Ning Wu

As declarative query processing techniques expand in scope --- to the Web, data streams, network routers, and cloud platforms --- there is an increasing need for adaptive query processing techniques that can re-plan in the presence of…

Databases · Computer Science 2014-09-23 Mengmeng Liu , Zachary G. Ives , Boon Thau Loo

Automated question quality rating (AQQR) aims to evaluate question quality through computational means, thereby addressing emerging challenges in online learnersourced question repositories. Existing methods for AQQR rely solely on…

Computation and Language · Computer Science 2021-11-22 Lin Ni , Qiming Bao , Xiaoxuan Li , Qianqian Qi , Paul Denny , Jim Warren , Michael Witbrock , Jiamou Liu

Open-domain question answering (QA) aims to find the answer to a question from a large collection of documents.Though many models for single-document machine comprehension have achieved strong performance, there is still much room for…

Computation and Language · Computer Science 2020-06-11 Mantong Zhou , Zhouxing Shi , Minlie Huang , Xiaoyan Zhu

Dealing with distribution shifts is one of the central challenges for modern machine learning. One fundamental situation is the covariate shift, where the input distributions of data change from training to testing stages while the…

Machine Learning · Computer Science 2024-05-28 Yu-Jie Zhang , Zhen-Yu Zhang , Peng Zhao , Masashi Sugiyama

Open Domain Question Answering (ODQA) within natural language processing involves building systems that answer factual questions using large-scale knowledge corpora. Recent advances stem from the confluence of several factors, such as…

Computation and Language · Computer Science 2024-06-21 Akchay Srivastava , Atif Memon

The aim of this study is to understand what are the collective actions of architecture practitioners when grouping floor plan designs. The understanding of how professionals and students solve this complex problem may help to develop…

We provide a unified framework using which we design scalable dynamic adaptive video streaming algorithms based on index based policies (dubbed DAS-IP) to maximize the Quality of Experience (QoE) provided to clients using video streaming…

Networking and Internet Architecture · Computer Science 2016-12-20 Rahul Singh , P. R. Kumar

Answering complex logical queries on incomplete knowledge graphs is a challenging task, and has been widely studied. Embedding-based methods require training on complex queries, and cannot generalize well to out-of-distribution query…

Machine Learning · Computer Science 2023-06-08 Yushi Bai , Xin Lv , Juanzi Li , Lei Hou

Retrieval-Augmented Large Language Models (LLMs), which incorporate the non-parametric knowledge from external knowledge bases into LLMs, have emerged as a promising approach to enhancing response accuracy in several tasks, such as…

Computation and Language · Computer Science 2024-03-29 Soyeong Jeong , Jinheon Baek , Sukmin Cho , Sung Ju Hwang , Jong C. Park

While there has been substantial progress in text comprehension through simple factoid question answering, more holistic comprehension of a discourse still presents a major challenge (Dunietz et al., 2020). Someone critically reflecting on…

Computation and Language · Computer Science 2022-10-18 Wei-Jen Ko , Cutter Dalton , Mark Simmons , Eliza Fisher , Greg Durrett , Junyi Jessy Li

The behavior decision-making subsystem is a key component of the autonomous driving system, which reflects the decision-making ability of the vehicle and the driver, and is an important symbol of the high-level intelligence of the vehicle.…

Machine Learning · Computer Science 2024-12-31 Zixiang Wang , Hao Yan , Changsong Wei , Junyu Wang , Minheng Xiao

We consider dynamic pricing algorithms as applied to the online set cover problem. In the dynamic pricing framework, we assume the standard client server model with the additional constraint that the server can only place prices over the…

Data Structures and Algorithms · Computer Science 2024-09-24 Max Bender , Aum Desai , Jialin He , Oliver Thompson , Pramithas Upreti

The class of direct preference optimization (DPO) algorithms has emerged as a promising approach for solving the alignment problem in foundation models. These algorithms work with very limited feedback in the form of pairwise preferences…

Machine Learning · Computer Science 2026-02-03 Luca Viano , Ruida Zhou , Yifan Sun , Mahdi Namazifar , Volkan Cevher , Shoham Sabach , Mohammad Ghavamzadeh

Questions that require counting a variety of objects in images remain a major challenge in visual question answering (VQA). The most common approaches to VQA involve either classifying answers based on fixed length representations of both…

Artificial Intelligence · Computer Science 2018-03-05 Alexander Trott , Caiming Xiong , Richard Socher

Ranking algorithms are fundamental to various online platforms across e-commerce sites to content streaming services. Our research addresses the challenge of adaptively ranking items from a candidate pool for heterogeneous users, a key…

Machine Learning · Computer Science 2024-06-10 Jingyuan Wang , Perry Dong , Ying Jin , Ruohan Zhan , Zhengyuan Zhou

Amid historically low response rates, survey researchers seek ways to reduce respondent burden while measuring desired concepts with precision. We propose to ask fewer questions of respondents and impute missing responses via probabilistic…

Applications · Statistics 2019-06-19 Chelsea Zhang , Sean J. Taylor , Curtiss Cobb , Jasjeet Sekhon

Query reformulations have long been a key mechanism to alleviate the vocabulary-mismatch problem in information retrieval, for example by expanding the queries with related query terms or by generating paraphrases of the queries. In this…

Information Retrieval · Computer Science 2020-07-17 Xiao Wang , Craig Macdonald , Iadh Ounis

Question answering (QA) has been the subject of a resurgence over the past years. The said resurgence has led to a multitude of question answering (QA) systems being developed both by companies and research facilities. While a few…

Artificial Intelligence · Computer Science 2016-11-09 Ricardo Usbeck , Jonathan Huthmann , Nico Duldhardt , Axel-Cyrille Ngonga Ngomo

Questions Under Discussion (QUD) is a versatile linguistic framework in which discourse progresses as continuously asking questions and answering them. Automatic parsing of a discourse to produce a QUD structure thus entails a complex…

Computation and Language · Computer Science 2023-11-03 Yating Wu , Ritika Mangla , Greg Durrett , Junyi Jessy Li