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We propose a novel document generation process based on hierarchical latent tree models (HLTMs) learned from data. An HLTM has a layer of observed word variables at the bottom and multiple layers of latent variables on top. For each…

Computation and Language · Computer Science 2019-07-01 Peixian Chen , Zhourong Chen , Nevin L. Zhang

Multi-label classification (MC) is a standard machine learning problem in which a data point can be associated with a set of classes. A more challenging scenario is given by hierarchical multi-label classification (HMC) problems, in which…

Machine Learning · Computer Science 2022-10-05 Eleonora Giunchiglia , Thomas Lukasiewicz

In this paper, we propose a novel approach based on cost-sensitive ensemble weighted extreme learning machine; we call this approach AE1-WELM. We apply this approach to text classification. AE1-WELM is an algorithm including balanced and…

Information Retrieval · Computer Science 2018-05-18 Ming Li , Peilun Xiao , Ju Zhang

Large language models produce powerful text embeddings, but their causal attention mechanism restricts the flow of information from later to earlier tokens, degrading representation quality. While recent methods attempt to solve this by…

Computation and Language · Computer Science 2025-11-20 Xueying Ding , Xingyue Huang , Mingxuan Ju , Liam Collins , Yozen Liu , Leman Akoglu , Neil Shah , Tong Zhao

Due to the complex label hierarchy and intensive labeling cost in practice, the hierarchical text classification (HTC) suffers a poor performance especially when low-resource or few-shot settings are considered. Recently, there is a growing…

Computation and Language · Computer Science 2023-05-29 Ke Ji , Yixin Lian , Jingsheng Gao , Baoyuan Wang

Text categorization is the task of assigning labels to documents written in a natural language, and it has numerous real-world applications including sentiment analysis as well as traditional topic assignment tasks. In this paper, we…

Computation and Language · Computer Science 2020-03-05 Changzeng Fu , Chaoran Liu , Carlos Toshinori Ishi , Yuichiro Yoshikawa , Hiroshi Ishiguro

In this paper, we propose the Hierarchical Document Transformer (HDT), a novel sparse Transformer architecture tailored for structured hierarchical documents. Such documents are extremely important in numerous domains, including science,…

Machine Learning · Computer Science 2024-07-12 Haoyu He , Markus Flicke , Jan Buchmann , Iryna Gurevych , Andreas Geiger

Multi-label Text Classification (MLTC) is the task of categorizing documents into one or more topics. Considering the large volumes of data and varying domains of such tasks, fully supervised learning requires manually fully annotated…

Computation and Language · Computer Science 2022-10-28 Ziwen Liu , Josep Grau-Bove , Scott Allan Orr

In order to learn quickly with few samples, meta-learning utilizes prior knowledge learned from previous tasks. However, a critical challenge in meta-learning is task uncertainty and heterogeneity, which can not be handled via globally…

Machine Learning · Computer Science 2019-11-19 Huaxiu Yao , Ying Wei , Junzhou Huang , Zhenhui Li

A great variety of text tasks such as topic or spam identification, user profiling, and sentiment analysis can be posed as a supervised learning problem and tackle using a text classifier. A text classifier consists of several subprocesses,…

Computation and Language · Computer Science 2017-09-18 Eric S. Tellez , Daniela Moctezuma , Sabino Miranda-Jímenez , Mario Graff

The peer merit review of research proposals has been the major mechanism for deciding grant awards. However, research proposals have become increasingly interdisciplinary. It has been a longstanding challenge to assign interdisciplinary…

Information Retrieval · Computer Science 2023-02-23 Meng Xiao , Ziyue Qiao , Yanjie Fu , Hao Dong , Yi Du , Pengyang Wang , Hui Xiong , Yuanchun Zhou

Extreme Multilabel Text Classification (XMTC) is a text classification problem in which, (i) the output space is extremely large, (ii) each data point may have multiple positive labels, and (iii) the data follows a strongly imbalanced…

Machine Learning · Computer Science 2021-12-15 Mohammadreza Qaraei , Rohit Babbar

The current state-of-the-art model HiAGM for hierarchical text classification has two limitations. First, it correlates each text sample with all labels in the dataset which contains irrelevant information. Second, it does not consider any…

Computation and Language · Computer Science 2021-04-13 Zhongfen Deng , Hao Peng , Dongxiao He , Jianxin Li , Philip S. Yu

Hierarchical Text Classification (HTC) involves assigning documents to labels organized within a taxonomy. Most previous research on HTC has focused on supervised methods. However, in real-world scenarios, employing supervised HTC can be…

Computation and Language · Computer Science 2026-05-18 Qianbo Zang , Christophe Zgrzendek , Igor Tchappi , Afshin Khadangi , Johannes Sedlmeir

In this paper, we propose a multi-label classification framework to detect multiple speaking styles in a speech sample. Unlike previous studies that have primarily focused on identifying a single target style, our framework effectively…

Audio and Speech Processing · Electrical Eng. & Systems 2025-09-19 Miseul Kim , Seyun Um , Hyeonjin Cha , Hong-goo Kang

Extreme multi-label text classification utilizes the label hierarchy to partition extreme labels into multiple label groups, turning the task into simple multi-group multi-label classification tasks. Current research encodes labels as a…

Computation and Language · Computer Science 2023-03-03 Li Wang , Ying Wah Teh , Mohammed Ali Al-Garadi

Soft attention is a critical mechanism powering LLMs to locate relevant parts within a given context. However, individual attention weights are determined by the similarity of only a single query and key token vector. This "single token…

Computation and Language · Computer Science 2025-07-14 Olga Golovneva , Tianlu Wang , Jason Weston , Sainbayar Sukhbaatar

Hierarchy is a common and effective way of organizing data and representing their relationships at different levels of abstraction. However, hierarchical data dependencies cause difficulties in the estimation of "separable" models that can…

Information Retrieval · Computer Science 2016-09-05 Mostafa Dehghani , Hosein Azarbonyad , Jaap Kamps , Maarten Marx

This work describes an automatic text classification method implemented in a software tool called NETHIC, which takes advantage of the inner capabilities of highly-scalable neural networks combined with the expressiveness of hierarchical…

Artificial Intelligence · Computer Science 2026-03-13 Luigi Lomasto , Rosario Di Florio , Andrea Ciapetti , Giuseppe Miscione , Giulia Ruggiero , Daniele Toti

International Classification of Diseases (ICD) coding is the task of assigning ICD diagnosis codes to clinical notes. This can be challenging given the large quantity of labels (nearly 9,000) and lengthy texts (up to 8,000 tokens). However,…

Computation and Language · Computer Science 2023-09-19 Junwen Duan , Han Jiang , Ying Yu