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Hierarchical reinforcement learning (HRL) improves the efficiency of long-horizon reinforcement-learning tasks with sparse rewards by decomposing the task into a hierarchy of subgoals. The main challenge of HRL is efficient discovery of the…

Machine Learning · Computer Science 2025-07-08 Sadegh Khorasani , Saber Salehkaleybar , Negar Kiyavash , Matthias Grossglauser

In applications where categorical labels follow a natural hierarchy, classification methods that exploit the label structure often outperform those that do not. Un-fortunately, the majority of classification datasets do not come…

In many large-scale classification problems, classes are organized in a known hierarchy, typically represented as a tree expressing the inclusion of classes in superclasses. We introduce a loss for this type of supervised hierarchical…

Computer Vision and Pattern Recognition · Computer Science 2024-11-26 Nicolas Urbani , Sylvain Rousseau , Yves Grandvalet , Leonardo Tanzi

Convolutional neural networks (CNNs) are a representative class of deep learning algorithms including convolutional computation that perform translation-invariant classification of input data based on their hierarchical architecture.…

Machine Learning · Computer Science 2023-03-14 Zihao Guo , Yueying Cao

Multi-label text classification involves extracting all relevant labels from a sentence. Given the unordered nature of these labels, we propose approaching the problem as a set prediction task. To address the correlation between labels, we…

Computation and Language · Computer Science 2024-03-15 Du Xinkai , Han Quanjie , Sun Yalin , Lv Chao , Sun Maosong

Hierarchical clustering is a popular unsupervised data analysis method. For many real-world applications, we would like to exploit prior information about the data that imposes constraints on the clustering hierarchy, and is not captured by…

Data Structures and Algorithms · Computer Science 2018-07-17 Vaggos Chatziafratis , Rad Niazadeh , Moses Charikar

Mining a set of meaningful topics organized into a hierarchy is intuitively appealing since topic correlations are ubiquitous in massive text corpora. To account for potential hierarchical topic structures, hierarchical topic models…

Computation and Language · Computer Science 2020-07-21 Yu Meng , Yunyi Zhang , Jiaxin Huang , Yu Zhang , Chao Zhang , Jiawei Han

Taxonomy is a hierarchically structured knowledge graph that plays a crucial role in machine intelligence. The taxonomy expansion task aims to find a position for a new term in an existing taxonomy to capture the emerging knowledge in the…

Computation and Language · Computer Science 2022-04-27 Suyuchen Wang , Ruihui Zhao , Xi Chen , Yefeng Zheng , Bang Liu

Algorithmic classifications of research publications can be used to study many different aspects of the science system, such as the organization of science into fields, the growth of fields, interdisciplinarity, and emerging topics. How to…

Digital Libraries · Computer Science 2021-01-01 Peter Sjögårde , Per Ahlgren , Ludo Waltman

Hypernymy, textual entailment, and image captioning can be seen as special cases of a single visual-semantic hierarchy over words, sentences, and images. In this paper we advocate for explicitly modeling the partial order structure of this…

Machine Learning · Computer Science 2016-03-02 Ivan Vendrov , Ryan Kiros , Sanja Fidler , Raquel Urtasun

Over the past decade, deep neural networks have proven to be adept in image classification tasks, often surpassing humans in terms of accuracy. However, standard neural networks often fail to understand the concept of hierarchical…

Computer Vision and Pattern Recognition · Computer Science 2022-06-15 Amitangshu Mukherjee , Isha Garg , Kaushik Roy

Hierarchical classification addresses the problem of classifying items into a hierarchy of classes. An important issue in hierarchical classification is the evaluation of different classification algorithms, which is complicated by the…

Artificial Intelligence · Computer Science 2015-04-01 Aris Kosmopoulos , Ioannis Partalas , Eric Gaussier , Georgios Paliouras , Ion Androutsopoulos

To make good decisions in the real world people need efficient planning strategies because their computational resources are limited. Knowing which planning strategies would work best for people in different situations would be very useful…

Artificial Intelligence · Computer Science 2021-02-02 Saksham Consul , Lovis Heindrich , Jugoslav Stojcheski , Falk Lieder

Analyzing the readability of articles has been an important sociolinguistic task. Addressing this task is necessary to the automatic recommendation of appropriate articles to readers with different comprehension abilities, and it further…

Information Retrieval · Computer Science 2021-03-09 Changping Meng , Muhao Chen , Jie Mao , Jennifer Neville

This paper studies the problem of detecting novel or unexpected instances in text classification. In traditional text classification, the classes appeared in testing must have been seen in training. However, in many applications, this is…

Machine Learning · Computer Science 2020-09-24 Qi Qin , Wenpeng Hu , Bing Liu

Scene text detection and document layout analysis have long been treated as two separate tasks in different image domains. In this paper, we bring them together and introduce the task of unified scene text detection and layout analysis. The…

Computer Vision and Pattern Recognition · Computer Science 2022-06-06 Shangbang Long , Siyang Qin , Dmitry Panteleev , Alessandro Bissacco , Yasuhisa Fujii , Michalis Raptis

We present an approach to automatically classify clinical text at a sentence level. We are using deep convolutional neural networks to represent complex features. We train the network on a dataset providing a broad categorization of health…

Computation and Language · Computer Science 2017-04-25 Mark Hughes , Irene Li , Spyros Kotoulas , Toyotaro Suzumura

Reading comprehension is a challenging task in natural language processing and requires a set of skills to be solved. While current approaches focus on solving the task as a whole, in this paper, we propose to use a neural network `skill'…

Computation and Language · Computer Science 2017-11-13 Todor Mihaylov , Zornitsa Kozareva , Anette Frank

A class or taxonomic hierarchy is often manually constructed, and part of our knowledge about the world. In this paper, we propose a novel algorithm for automatically acquiring a class hierarchy from a classifier which is often a large…

Machine Learning · Computer Science 2021-12-03 Kai Kang , Fangzhen Lin

This work investigates how the traditional image classification pipelines can be extended into a deep architecture, inspired by recent successes of deep neural networks. We propose a deep boosting framework based on layer-by-layer joint…

Computer Vision and Pattern Recognition · Computer Science 2015-08-12 Zhanglin Peng , Ya Li , Zhaoquan Cai , Liang Lin
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