作者：
Iida, FumiyaPfeifer, RolfSteels, LucKuniyoshi, YasuoUniversity of Zurich
Artificial Intelligence Laboratory Department of Informatics Andreasstr. 15 Zurich Switzerland Vrije Universiteit Brussel
Artificial Intelligence Laboratory and Sony Computer Science Laboratory Department of Informatics Pleinlaan 2 Brussels Belgium University of Tokyo
School of Information Science and Technology Dept. of Mechano-Informatics Laboratory for Intelligent Systems and Informatics Engineering Bldg. 8 7-3-1 Hongo Bunkyo-kuTokyo Japan
In this paper, we present a method of recognizing inclined, rotated characters. First we construct an eigen sub-space for each category using the covariance matrix which is calculated from a sufficient number of rotat...
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Finding all the occurrences of a twig pattern specified by a selection predicate on multiple elements in an XML document is a core operation for efficient evaluation of XML queries. Holistic twig join algorithms were ...
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ISBN:
(纸本)0127224424
Finding all the occurrences of a twig pattern specified by a selection predicate on multiple elements in an XML document is a core operation for efficient evaluation of XML queries. Holistic twig join algorithms were proposed recently as an optimal solution when the twig pattern only involves ancestordescendant relationships. In this paper, we address the problem of efficient processing of holistic twig joins on all/partly indexed XML documents. In particular, we propose an algorithm that utilizes available indices on element sets. While it can be shown analytically that the proposed algorithm is as efficient as the existing state-of-the-art algorithms in terms of worst case I/O and CPU cost, experimental results on various datasets indicate that the proposed index-based algorithm performs significantly better than the existing ones, especially when binary structural joins in the twig pattern have varying join selectivities.
Recently, a new class of data-intensive application becomes widely recognized where data is modeled best as transient open-end streams rather than persistent tables on disk. It leads to a new surge of research interes...
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For successful design and building real-time system and analysis of the designed model is required. Especially for a real-time system, timing constraints and deadlines appears to be critical parameters. This analysis ...
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For successful design and building real-time system and analysis of the designed model is required. Especially for a real-time system, timing constraints and deadlines appears to be critical parameters. This analysis can reveal critical sections, in completeness of the specification and ambiguous behaviour of the designed system. This paper represents a methodology for design real-time systems, verification technique and their capability for verification of real-time requirements with time-bounded constraints(e.g. time limits).
Simultaneous multithreading (SMT) attempts to attain higher processor utilization by allowing instructions from multiple independent threads to coexist in a processor and compete for shared resources. Previous studies...
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The Interface Specification of HLA defines sets of services to support realization of distributed simulations and RTI is software that implements these services. Time Management of RTI provides a transparent time mana...
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The Interface Specification of HLA defines sets of services to support realization of distributed simulations and RTI is software that implements these services. Time Management of RTI provides a transparent time management mechanism for distributed interactive simulation to ensure that federates using varied local time management mechanisms in a federation could run harmoniously. In this paper we research on time advance mechanism of distributed interactive simulation based on HLA/RTI in detail and design a simulation system to discuss problems in Time Management. At last simulation results is given.
E-government would be a lot easier if it could be handled like e-business. Unfortunately there are organizational and legal obstacles that make it virtually impossible. The security level needed for public administrat...
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Reactively steered antenna arrays (RESAAs) can be steered electronically by varying their load impedances. To maximize radiation efficiency, the load impedance must be reactive to avoid ohmic losses. A simple means to...
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The effect of inverter ripple current on fuel cell stack performance is not well understood. This paper provides a first-order examination of the impact of inverter load dynamics on SOFC fuel cell operation. Previous ...
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ISBN:
(纸本)0791836681
The effect of inverter ripple current on fuel cell stack performance is not well understood. This paper provides a first-order examination of the impact of inverter load dynamics on SOFC fuel cell operation. Previous work using steady-state fuel cell loading has shown that DC-current loading itself results in degradation of the fuel cell, albeit in ways yet to be fully understood. This result suggests that the varying reactant conditions that result from ripple may modify degradation processes, and, therefore, the lifetime of the cells. This paper investigates these conditions through the use of a dynamic one-dimensional model for the detailed mass transport occurring within the electrode of a cell. In this work, the inverter load is imposed as a boundary condition to the transient model. Results show the behavior of the reactant concentrations within the stack electrodes under inverter loads with frequencies between 60 Hz and 1250 Hz. It is concluded that a ripple factor of less than 6% be used to ensure minor impact to the conditions at the electrode-electrolyte interface.
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