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"Topic": models, code, and papers

Investigating Antigram Behaviour using Distributional Semantics

Jan 15, 2019
Saptarshi Sengupta

Language is an extremely interesting subject to study, each day presenting new challenges and new topics for research. Words in particular have several unique characteristics which when explored, prove to be astonishing. Anagrams and Antigrams are such words possessing these amazing properties. The presented work is an exploration into generating anagrams from a given word and determining whether there exists antigram relationships between the pairs of generated anagrams in light of the Word2Vec distributional semantic similarity model. The experiments conducted, showed promising results for detecting antigrams.

* 4 pages 

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GraphVAE: Towards Generation of Small Graphs Using Variational Autoencoders

Feb 09, 2018
Martin Simonovsky, Nikos Komodakis

Deep learning on graphs has become a popular research topic with many applications. However, past work has concentrated on learning graph embedding tasks, which is in contrast with advances in generative models for images and text. Is it possible to transfer this progress to the domain of graphs? We propose to sidestep hurdles associated with linearization of such discrete structures by having a decoder output a probabilistic fully-connected graph of a predefined maximum size directly at once. Our method is formulated as a variational autoencoder. We evaluate on the challenging task of molecule generation.

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The formal-logical characterisation of lies, deception, and associated notions

Dec 28, 2016
Toni Heidenreich

Defining various dishonest notions in a formal way is a key step to enable intelligent agents to act in untrustworthy environments. This review evaluates the literature for this topic by looking at formal definitions based on modal logic as well as other formal approaches. Criteria from philosophical groundwork is used to assess the definitions for correctness and completeness. The key contribution of this review is to show that only a few definitions fully comply with this gold standard and to point out the missing steps towards a successful application of these definitions in an actual agent environment.

* Literature review prepared as a student at King's College London 

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Stochastic Collapsed Variational Inference for Sequential Data

Dec 05, 2015
Pengyu Wang, Phil Blunsom

Stochastic variational inference for collapsed models has recently been successfully applied to large scale topic modelling. In this paper, we propose a stochastic collapsed variational inference algorithm in the sequential data setting. Our algorithm is applicable to both finite hidden Markov models and hierarchical Dirichlet process hidden Markov models, and to any datasets generated by emission distributions in the exponential family. Our experiment results on two discrete datasets show that our inference is both more efficient and more accurate than its uncollapsed version, stochastic variational inference.

* NIPS Workshop on Advances in Approximate Bayesian Inference, 2015 

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Toward Fuzzy block theory

May 15, 2008
H. Owladeghaffari

This study, fundamentals of fuzzy block theory, and its application in assessment of stability in underground openings, has surveyed. Using fuzzy topics and inserting them in to key block theory, in two ways, fundamentals of fuzzy block theory has been presented. In indirect combining, by coupling of adaptive Neuro Fuzzy Inference System (NFIS) and classic block theory, we could extract possible damage parts around a tunnel. In direct solution, some principles of block theory, by means of different fuzzy facets theory, were rewritten.


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The ALVIS Format for Linguistically Annotated Documents

Sep 24, 2006
Adeline Nazarenko, Erick Alphonse, Julien Derivière, Thierry Hamon, Guillaume Vauvert, Davy Weissenbacher

The paper describes the ALVIS annotation format designed for the indexing of large collections of documents in topic-specific search engines. This paper is exemplified on the biological domain and on MedLine abstracts, as developing a specialized search engine for biologists is one of the ALVIS case studies. The ALVIS principle for linguistic annotations is based on existing works and standard propositions. We made the choice of stand-off annotations rather than inserted mark-up. Annotations are encoded as XML elements which form the linguistic subsection of the document record.

* Proceedings of the fifth international conference on Language Resources and Evaluation, LREC 2006 (2006) 1782-1786 

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5G from Space: An Overview of 3GPP Non-Terrestrial Networks

Mar 16, 2021
Xingqin Lin, Stefan Rommer, Sebastian Euler, Emre A. Yavuz, Robert S. Karlsson

We provide an overview of the 3rd generation partnership project (3GPP) work on evolving the 5G wireless technology to support non-terrestrial satellite networks. Adapting 5G to support non-terrestrial networks entails a holistic design spanning across multiple areas from radio access network to services and system aspects to core and terminals. In this article, we describe the main topics of non-terrestrial networks, explain in detail the design aspects, and share various design rationales influencing standardization.

* 8 pages, 5 figures, 1 table, submitted for publication 

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Adversarial trading

Dec 16, 2020
Alexandre Miot

Adversarial samples have drawn a lot of attention from the Machine Learning community in the past few years. An adverse sample is an artificial data point coming from an imperceptible modification of a sample point aiming at misleading. Surprisingly, in financial research, little has been done in relation to this topic from a concrete trading point of view. We show that those adversarial samples can be implemented in a trading environment and have a negative impact on certain market participants. This could have far reaching implications for financial markets either from a trading or a regulatory point of view.

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Comparator-adaptive Convex Bandits

Jul 16, 2020
Dirk van der Hoeven, Ashok Cutkosky, Haipeng Luo

We study bandit convex optimization methods that adapt to the norm of the comparator, a topic that has only been studied before for its full-information counterpart. Specifically, we develop convex bandit algorithms with regret bounds that are small whenever the norm of the comparator is small. We first use techniques from the full-information setting to develop comparator-adaptive algorithms for linear bandits. Then, we extend the ideas to convex bandits with Lipschitz or smooth loss functions, using a new single-point gradient estimator and carefully designed surrogate losses.

* 15 pages 

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X-WikiRE: A Large, Multilingual Resource for Relation Extraction as Machine Comprehension

Aug 15, 2019
Mostafa Abdou, Cezar Sas, Rahul Aralikatte, Isabelle Augenstein, Anders Søgaard

Although the vast majority of knowledge bases KBs are heavily biased towards English, Wikipedias do cover very different topics in different languages. Exploiting this, we introduce a new multilingual dataset (X-WikiRE), framing relation extraction as a multilingual machine reading problem. We show that by leveraging this resource it is possible to robustly transfer models cross-lingually and that multilingual support significantly improves (zero-shot) relation extraction, enabling the population of low-resourced KBs from their well-populated counterparts.

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