Results 211 to 220 of about 372 (252)
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective Early risk stratification may support clinical decision‐making in spontaneous intracerebral hemorrhage (ICH). We aimed to develop and internally validate HAGIV, a score integrating frequency of imaging markers (FIM), a time‐adjusted non‐contrast computed tomography (CT) metric of hematoma expansion, with established predictors for 90‐
Lei Song +10 more
wiley +1 more source
General notions of indexability for queueing control and asset management [PDF]
Annals of Applied Probability, 2011 We develop appropriately generalized notions of indexability for problems of dynamic resource allocation where the resource concerned may be assigned more flexibility than is allowed, for example, in classical multi-armed bandits. Most especially we have
Kevin D Glazebrook
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Testing indexability and computing Whittle and Gittins index in subcubic time
Mathematical Methods of Operations Research, 2023 Whittle index is a generalization of Gittins index that provides very efficient allocation rules for restless multi-armed bandits. In this work, we develop an algorithm to test the indexability and compute the Whittle indices of any finite-state restless
Nicolas Gast +2 more
exaly +3 more sources
Indexability-Based Dataset Partitioning
Lecture Notes in Computer Science, 2019 Indexing exploits assumptions on the inner structures of a dataset to make the nearest neighbor queries cheaper to resolve. Datasets are generally indexed at once into a unique index for similarity search.
Ubaldo Ruiz +2 more
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Dynamic Indexability and the Optimality of B-Trees
Journal of the ACM, 2012 One-dimensional range queries, as one of the most basic type of queries in databases, have been studied extensively in the literature. For large databases, the goal is to build an external index that is optimized for disk block accesses (or I/Os).
Ke Yi
exaly +2 more sources
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An Index Is an Index Is an Index?
Schmalenbach Business Review, 2001Before June 1999, Deutsche Borse AG published two parallel index values, one calculated from floor prices and the other from Xetra prices. Since 1999, Deutsche Borse has calculated the DAX blue-chip index and the MDAX mid-cap index using only the prices of the electronic trading system Xetra.
Freihube, Thorsten, Theissen, Erik
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On two-dimensional indexability and optimal range search indexing
, 1999 Summarization: In this paper we settle several longstanding open problems in theory of indexability and external orthogonal range search ing In the rst part of the paper we apply the theory of indexability to the problem of twodimensional range search ...
Lars Arge +2 more
exaly +1 more source
Dynamic indexability and lower bounds for dynamic one-dimensional range query indexes
, 2009 The B-tree is a fundamental external index structure that is widely used for answering one-dimensional range reporting queries. Given a set of N keys, a range query can be answered in O(logBN/M + K/B ) I/Os, where B is the disk block size, K the output ...
Ke Yi
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