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"Topic": models, code, and papers

Condensés de textes par des méthodes numériques

Dec 09, 2012
Juan-Manuel Torres-Moreno, Patricia Velázquez-Morales, Jean-Guy Meunier

Since information in electronic form is already a standard, and that the variety and the quantity of information become increasingly large, the methods of summarizing or automatic condensation of texts is a critical phase of the analysis of texts. This article describes CORTEX a system based on numerical methods, which allows obtaining a condensation of a text, which is independent of the topic and of the length of the text. The structure of the system enables it to find the abstracts in French or Spanish in very short times.

* Conf\'erence JADT 2002, Saint-Malo/France. 12 pages, 7 figures 

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Adaptation and Self-Organization in Evolutionary Algorithms

Jul 03, 2009
James M Whitacre

Abbreviated Abstract: The objective of Evolutionary Computation is to solve practical problems (e.g. optimization, data mining) by simulating the mechanisms of natural evolution. This thesis addresses several topics related to adaptation and self-organization in evolving systems with the overall aims of improving the performance of Evolutionary Algorithms (EA), understanding its relation to natural evolution, and incorporating new mechanisms for mimicking complex biological systems.

* PhD Thesis 

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Linear Segmentation and Segment Significance

Sep 15, 1998
Min-Yen Kan, Judith L. Klavans, Kathleen R. McKeown

We present a new method for discovering a segmental discourse structure of a document while categorizing segment function. We demonstrate how retrieval of noun phrases and pronominal forms, along with a zero-sum weighting scheme, determines topicalized segmentation. Futhermore, we use term distribution to aid in identifying the role that the segment performs in the document. Finally, we present results of evaluation in terms of precision and recall which surpass earlier approaches.

* Proceedings of 6th International Workshop of Very Large Corpora (WVLC-6), Montreal, Quebec, Canada: Aug. 1998. pp. 197-205 
* 9 pages, US Letter, 4 figures. Software License can be found at http://www.cs.columbia.edu/nlp/licenses/segmenterLicenseDownload.html 

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Exploring Thematic Coherence in Fake News

Dec 17, 2020
Martins Samuel Dogo, Deepak P, Anna Jurek-Loughrey

The spread of fake news remains a serious global issue; understanding and curtailing it is paramount. One way of differentiating between deceptive and truthful stories is by analyzing their coherence. This study explores the use of topic models to analyze the coherence of cross-domain news shared online. Experimental results on seven cross-domain datasets demonstrate that fake news shows a greater thematic deviation between its opening sentences and its remainder.

* 10 pages, 1 figure, to be published in Proceedings of the 8th International Workshop on News Recommendation and Analytics (INRA 2020) 

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Partial differential equation regularization for supervised machine learning

Oct 03, 2019
Adam M Oberman

This article is an overview of supervised machine learning problems for regression and classification. Topics include: kernel methods, training by stochastic gradient descent, deep learning architecture, losses for classification, statistical learning theory, and dimension independent generalization bounds. Implicit regularization in deep learning examples are presented, including data augmentation, adversarial training, and additive noise. These methods are reframed as explicit gradient regularization.

* 16 pages, 5 figures 

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Random Projection and Its Applications

Oct 09, 2017
Mahmoud Nabil

Random Projection is a foundational research topic that connects a bunch of machine learning algorithms under a similar mathematical basis. It is used to reduce the dimensionality of the dataset by projecting the data points efficiently to a smaller dimensions while preserving the original relative distance between the data points. In this paper, we are intended to explain random projection method, by explaining its mathematical background and foundation, the applications that are currently adopting it, and an overview on its current research perspective.


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Improved 2D Keypoint Detection in Out-of-Balance and Fall Situations -- combining input rotations and a kinematic model

Dec 22, 2021
Michael Zwölfer, Dieter Heinrich, Kurt Schindelwig, Bastian Wandt, Helge Rhodin, Joerg Spoerri, Werner Nachbauer

Injury analysis may be one of the most beneficial applications of deep learning based human pose estimation. To facilitate further research on this topic, we provide an injury specific 2D dataset for alpine skiing, covering in total 533 images. We further propose a post processing routine, that combines rotational information with a simple kinematic model. We could improve detection results in fall situations by up to 21% regarding the [email protected] metric.

* extended abstract, 4 pages, 3 figures, 2 tables 

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Investigating the Effect of Emoji in Opinion Classification of Uzbek Movie Review Comments

Aug 02, 2020
Ilyos Rabbimov, Iosif Mporas, Vasiliki Simaki, Sami Kobilov

Opinion mining on social media posts has become more and more popular. Users often express their opinion on a topic not only with words but they also use image symbols such as emoticons and emoji. In this paper, we investigate the effect of emoji-based features in opinion classification of Uzbek texts, and more specifically movie review comments from YouTube. Several classification algorithms are tested, and feature ranking is performed to evaluate the discriminative ability of the emoji-based features.

* 10 pages, 1 figure, 3 tables 

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An Influence-based Clustering Model on Twitter

Nov 19, 2018
Abbas Ehsanfar, Mo Mansouri

This paper introduces a temporal framework for detecting and clustering emergent and viral topics on social networks. Endogenous and exogenous influence on developing viral content is explored using a clustering method based on the a user's behavior on social network and a dataset from Twitter API. Results are discussed by introducing metrics such as popularity, burstiness, and relevance score. The results show clear distinction in characteristics of developed content by the two classes of users.

* INFORMS 13th Data Mining and Decision Analytics Workshop 

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A Summary of the 4th International Workshop on Recovering 6D Object Pose

Oct 09, 2018
Tomas Hodan, Rigas Kouskouridas, Tae-Kyun Kim, Federico Tombari, Kostas Bekris, Bertram Drost, Thibault Groueix, Krzysztof Walas, Vincent Lepetit, Ales Leonardis, Carsten Steger, Frank Michel, Caner Sahin, Carsten Rother, Jiri Matas

This document summarizes the 4th International Workshop on Recovering 6D Object Pose which was organized in conjunction with ECCV 2018 in Munich. The workshop featured four invited talks, oral and poster presentations of accepted workshop papers, and an introduction of the BOP benchmark for 6D object pose estimation. The workshop was attended by 100+ people working on relevant topics in both academia and industry who shared up-to-date advances and discussed open problems.

* In: Computer Vision - ECCV 2018 Workshops - Munich, Germany, September 8-9 and 14, 2018, Proceedings 

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