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In this work, we study two simple yet general complexity classes, based on logspace Turing machines, which provide a unifying framework for efficient query evaluation in areas like information extraction and graph databases, among others.…

数据结构与算法 · 计算机科学 2021-06-24 Marcelo Arenas , Luis Alberto Croquevielle , Rajesh Jayaram , Cristian Riveros

Document-based Visual Question Answering poses a challenging task between linguistic sense disambiguation and fine-grained multimodal retrieval. Although there has been encouraging progress in document-based question answering due to the…

计算与语言 · 计算机科学 2023-10-20 Jieting Long , Zewei Shi , Penghao Jiang , Yidong Gan

A graph spanner is a fundamental graph structure that faithfully preserves the pairwise distances in the input graph up to a small multiplicative stretch. The common objective in the computation of spanners is to achieve the best-known…

数据结构与算法 · 计算机科学 2019-02-25 Merav Parter , Ronitt Rubinfeld , Ali Vakilian , Anak Yodpinyanee

Definition Extraction (DE) is one of the well-known topics in Information Extraction that aims to identify terms and their corresponding definitions in unstructured texts. This task can be formalized either as a sentence classification task…

计算与语言 · 计算机科学 2020-05-01 Amir Pouran Ben Veyseh , Franck Dernoncourt , Dejing Dou , Thien Huu Nguyen

A systematic review identifies and collates various clinical studies and compares data elements and results in order to provide an evidence based answer for a particular clinical question. The process is manual and involves lot of time. A…

We are presenting a set of multilingual text analysis tools that can help analysts in any field to explore large document collections quickly in order to determine whether the documents contain information of interest, and to find the…

计算与语言 · 计算机科学 2007-05-23 Camelia Ignat , Bruno Pouliquen , Ralf Steinberger , Tomaz Erjavec

Dynamic trees are a well-studied and fundamental building block of dynamic graph algorithms dating back to the seminal work of Sleator and Tarjan [STOC'81, (1981), pp. 114-122]. The problem is to maintain a tree subject to online edge…

数据结构与算法 · 计算机科学 2023-06-16 Daniel Anderson , Guy E. Blelloch

Eliciting preferences from human judgements is inherently imprecise, yet most decision analysis methods force a single priority vector from pairwise comparisons, discarding the information embedded in inconsistencies. We instead leverage…

综合经济学 · 经济学 2026-02-27 Salvatore Greco , Sajid Siraj , Michele Lundy

We consider constrained optimization problems with a nonsmooth objective function in the form of mathematical expectation. The Sample Average Approximation (SAA) is used to estimate the objective function and variable sample size strategy…

最优化与控制 · 数学 2022-08-09 Natasa Krejic , Natasa Krklec Jerinkic , Tijana Ostojic

The task of automatic text summarization produces a concise and fluent text summary while preserving key information and overall meaning. Recent approaches to document-level summarization have seen significant improvements in recent years…

计算与语言 · 计算机科学 2022-12-07 Gonçalo Raposo , Afonso Raposo , Ana Sofia Carmo

Extractive models usually formulate text summarization as extracting fixed top-$k$ salient sentences from the document as a summary. Few works exploited extracting finer-grained Elementary Discourse Unit (EDU) with little analysis and…

计算与语言 · 计算机科学 2023-03-14 Yuping Wu , Ching-Hsun Tseng , Jiayu Shang , Shengzhong Mao , Goran Nenadic , Xiao-Jun Zeng

Distributed representation learned with neural networks has recently shown to be effective in modeling natural languages at fine granularities such as words, phrases, and even sentences. Whether and how such an approach can be extended to…

计算与语言 · 计算机科学 2016-10-27 Qian Chen , Xiaodan Zhu , Zhenhua Ling , Si Wei , Hui Jiang

Unsupervised text embeddings extraction is crucial for text understanding in machine learning. Word2Vec and its variants have received substantial success in mapping words with similar syntactic or semantic meaning to vectors close to each…

计算与语言 · 计算机科学 2018-05-30 Furong Huang , Animashree Anandkumar

We consider the problem of computing the convolution of two long vectors using parallel processing units in the presence of "stragglers". Stragglers refer to the small fraction of faulty or slow processors that delays the entire computation…

信息论 · 计算机科学 2017-05-11 Sanghamitra Dutta , Viveck Cadambe , Pulkit Grover

In this work we study preprocessing for tractable problems when part of the input is unknown or uncertain. This comes up naturally if, e.g., the load of some machines or the congestion of some roads is not known far enough in advance, or if…

数据结构与算法 · 计算机科学 2015-10-20 Stefan Fafianie , Stefan Kratsch , Voung Anh Quyen

Document image segmentation is crucial for document analysis and recognition but remains challenging due to the diversity of document formats and segmentation tasks. Existing methods often address these tasks separately, resulting in…

计算机视觉与模式识别 · 计算机科学 2025-04-08 Xiao-Hui Li , Fei Yin , Cheng-Lin Liu

With the rapid increase in the volume of Big data of this digital era, fax documents, invoices, receipts, etc are traditionally subjected to compression for the efficiency of data storage and transfer. However, in order to process these…

计算机视觉与模式识别 · 计算机科学 2014-10-15 Mohammed Javed , P. Nagabhushan , B. B. Chaudhuri

Capturing the compositional process which maps the meaning of words to that of documents is a central challenge for researchers in Natural Language Processing and Information Retrieval. We introduce a model that is able to represent the…

计算与语言 · 计算机科学 2014-06-17 Misha Denil , Alban Demiraj , Nal Kalchbrenner , Phil Blunsom , Nando de Freitas

Fully understanding narratives often requires identifying events in the context of whole documents and modeling the event relations. However, document-level event extraction is a challenging task as it requires the extraction of event and…

计算与语言 · 计算机科学 2021-05-11 Kung-Hsiang Huang , Nanyun Peng

A rapid growth of web documents due to heavy use of World Wide Web necessitates efficient techniques to efficiently classify the document on the web. It is thus produced High volumes of data per second with high diversity. Automatically…

计算与语言 · 计算机科学 2020-06-03 Alireza Saleh Sedghpour , Mohammad Reza Saleh Sedghpour