Results 21 to 30 of about 15,972 (152)
Heuristic and Cost-based Optimization for Diverse Provenance Tasks
, 2018 A well-established technique for capturing database provenance as annotations on data is to instrument queries to propagate such annotations. However, even sophisticated query optimizers often fail to produce efficient execution plans for instrumented ...
Gawlick, Dieter +6 more
core +1 more source
Provenance for Aggregate Queries [PDF]
, 2011 We study in this paper provenance information for queries with aggregation. Provenance information was studied in the context of various query languages that do not allow for aggregation, and recent work has suggested to capture provenance by annotating ...
Amsterdamer, Yael +2 more
core +4 more sources
Algebraic Properties of Valued Constraint Satisfaction Problem [PDF]
, 2015 The paper presents an algebraic framework for optimization problems expressible as Valued Constraint Satisfaction Problems. Our results generalize the algebraic framework for the decision version (CSPs) provided by Bulatov et al. [SICOMP 2005].
A Bulatov +11 more
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On Defining SPARQL with Boolean Tensor Algebra [PDF]
, 2015 The Resource Description Framework (RDF) represents information as subject-predicate-object triples. These triples are commonly interpreted as a directed labelled graph. We propose an alternative approach, interpreting the data as a 3-way Boolean tensor.
Metzler, Saskia, Miettinen, Pauli
core +1 more source
Robotic Needle Steering for Percutaneous Interventions: Sensing, Modeling, and Control
Advanced Intelligent Systems, EarlyView.This review examines recent advances in robotic needle steering for percutaneous interventions, highlighting closed‐loop sensing, physics‐informed tissue‐needle interaction modeling, and real‐time trajectory planning and control. It synthesizes innovations in deep learning, fiber‐optic feedback, and adaptive control strategies, and outlines emerging ...
Fangjiao Zhao +5 more
wiley +1 more source
On orthogonal projections related to representations of the Hecke algebra on a tensor space
Journal of Mathematical Physics, 2022 We consider the problem of finding orthogonal projections P of a rank r that gives rise to representations of the Hecke algebra HN(q) in which the generators of the algebra act locally on the Nth tensor power of the space Cn. It is shown that such projections are global minima of a certain functional.
openaire +3 more sources
Deductive Optimization of Relational Data Storage
, 2020 Optimizing the physical data storage and retrieval of data are two key database management problems. In this paper, we propose a language that can express a wide range of physical database layouts, going well beyond the row- and column-based methods that
Feser, John K. +3 more
core +1 more source
The Curriculum Journal, EarlyView.Abstract This study explored how lecturers in a post‐92 UK university conceptualise and enact decolonial curriculum principles within their teaching and programme design. Drawing on semi‐structured interviews with academic staff across multiple disciplines, the research adopts a qualitative, phenomenologically informed approach to examine the interplay
Reece Sohdi
wiley +1 more source
A Learning Model with Memory in the Financial Markets
International Journal of Finance &Economics, EarlyView.ABSTRACT Learning is central to a financial agent's aspiration to gain persistent strategic advantage in asset value maximisation. The implicit mechanism that transforms this aspiration into an observed value gain is the speed of error corrections (demonstrating, an agent's speed of learning) whilst facing increased uncertainty.
Shikta Singh +6 more
wiley +1 more source
Algebraic structures of quantum projective field theory related to fusion and braiding. Hidden additive weight [PDF]
Journal of Mathematical Physics, 1994 The interaction of various algebraic structures describing fusion, braiding, and group symmetries in quantum projective field theory is the object of investigation in this article. Structures of projective Zamolodchikov algebras, their representations, spherical correlation functions, correlation characters and enveloping quantum projective field ...
openaire +2 more sources