Results 31 to 40 of about 2,583,497 (320)

Using bag-of-concepts to improve the performance of support vector machines in text categorization [PDF]

open access: yes, 2004
This paper investigates the use of concept-based representations for text categorization. We introduce a new approach to create concept-based text representations, and apply it to a standard text categorization collection. The representations are used as
Cöster, Rickard, Sahlgren, Magnus
core   +3 more sources

Underestimated Cost of Targeted Attacks on Complex Networks

open access: yesComplexity, 2018
The robustness of complex networks under targeted attacks is deeply connected to the resilience of complex systems, which is defined as the ability to make appropriate response to the attack. In this paper, we study robustness of complex networks under a
Xiao-Long Ren   +3 more
doaj   +1 more source

Representationer av aids

open access: yesKulturella Perspektiv, 2000
From this perspective our knowledge of the world is mediated through representations provided by language. The text interpellates the subject, by way of making her a specific subject with a specific social position.
Anne-Charlotte Ek
doaj   +1 more source

Orthographic input and phonological representations in learners of Chinese as a foreign language. [PDF]

open access: yes, 2006
This paper provides evidence that the second language orthographic input affects the mental representations of L2 phonology in instructed beginner L2 learners. Previous research has shown that orthographic representations affect monolinguals' performance
Bassetti, Benedetta
core   +1 more source

Combinatorial representations

open access: yesJournal of Combinatorial Theory, Series A, 2013
This paper introduces combinatorial representations, which generalise the notion of linear representations of matroids. We show that any family of subsets of the same cardinality has a combinatorial representation via matrices. We then prove that any graph is representable over all alphabets of size larger than some number depending on the graph.
Cameron, PJ, Gadouleau, M, Riis, S
openaire   +3 more sources

Worker representation

open access: yesSSRN Electronic Journal, 2022
We define worker representation, identify the factors that determine demand for it among workers and employers, discuss difficulties in supplying worker representation, and reflect on the implications of worker representation for worker welfare and the behavior and performance of employers.
Bryson, A., Forth, J.
openaire   +4 more sources

Black Box Galois Representations [PDF]

open access: yes, 2018
We develop methods to study $2$-dimensional $2$-adic Galois representations $\rho$ of the absolute Galois group of a number field $K$, unramified outside a known finite set of primes $S$ of $K$, which are presented as Black Box representations, where we ...
Argáez-García, Alejandro   +1 more
core   +2 more sources

Floquet Energies and Quantum Hall Effect in a Periodic Potential

open access: yes, 1998
The Quantum Hall Effect for free electrons in external periodic field is discussed without using the linear response approximation. We find that the Hall conductivity is related in a simple way to Floquet energies (associated to the Schroedinger equation
Dana I.   +3 more
core   +1 more source

Naturality and Induced Representations [PDF]

open access: yes, 2000
We show that induction of covariant representations for C*-dynamical systems is natural in the sense that it gives a natural transformation between certain crossed-product functors.
Echterhoff, Siegfried   +3 more
core   +3 more sources

Representation is representation of similarities

open access: yesBehavioral and Brain Sciences, 1998
Advanced perceptual systems are faced with the problem of securing a principled (ideally, veridical) relationship between the world and its internal representation. I propose a unified approach to visual representation, addressing the need for superordinate and basic-level categorization and for the identification of specific instances of familiar
openaire   +3 more sources

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