Models in testing are important for describing, understanding, and managing tests. In the automotive domain, AUTOSAR is an important standard to model components of electronic control units. AUTOSAR, however, lacks in...
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The multilevel inverters (MLIs) are classified into three topologies such as Diode Clamped, Flying Capacitor and Cascade Multilevel Inverter (CMLI). CMLI topologies include two kind of structure that is named symmetri...
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ISBN:
(纸本)9781467363914
The multilevel inverters (MLIs) are classified into three topologies such as Diode Clamped, Flying Capacitor and Cascade Multilevel Inverter (CMLI). CMLI topologies include two kind of structure that is named symmetric and asymmetric topologies. Asymmetric Cascade MLI (ACMLI) topologies consist of unequal DC sources. Many modulation techniques have been used in ACMLI topology such as Multi-Carrier PWM (MC-PWM), Space Vector PWM and Selective Harmonic PWM. The MC-PWM technique is achieved by four different types. In this study, MC-PWM techniques which are named Phase Disposition PWM, Phase Opposition Disposition PWM, Alternate Phase Opposition Disposition PWM and Phase Shifted PWM have been compared. It is uncovered that Phase Opposition Disposition PWM technique is more convenient in terms of Total Harmonic Distortion of output voltage and current signals and in terms of the quality of power factor in ACMLI which is performed in this study.
This paper presents a fault-tolerant middleware for private storage services based on a client-server model. A client-side API split files into redundant chunks, which are encoded/decoded, anonymized, and distributed ...
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An approach to the word sense disambiguation (WSD) relaying on the WordNet synsets is proposed. The method uses semantically tagged glosses to perform a process similar to the spreading activation in semantic network,...
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Popular web search engines tend to improve the relevance of their result pages, but the search is still keyword-oriented and far from "understanding" the queries' meaning. In the article we propose an in...
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作者：
Li LiComputer Aided Architectural Design
Institute for Technology in Architecture (ITA) Department for Architecture ETH Zurich Zurich 8092 Switzerland Urban Architectural Lab
Architectural Design Institute of Southeast University Nanjing 210096 China
Genetic Algorithm （GA） is widely adopted in optimization and the improvement of its optimization performance is attracting many researchers＇ attentions. In solving practical probtems in the process of architectural...
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Genetic Algorithm （GA） is widely adopted in optimization and the improvement of its optimization performance is attracting many researchers＇ attentions. In solving practical probtems in the process of architectural design, the ways of converting design problems into mathematical models that can be addressed by GA are of great significance in achieving final optimal results. However, no such rute that can be applied to such conversion has been devetoped so far. In general, problems which can be addressed by GA can be divided into combinatorial problems and numerical probtems. In this paper, by means of attempting to disintegrate a complicated architectural probtem into combinatorial and numericat probtems, the author discusses feasibitity and practicality of sotving these two types of problems simultaneousty utitizing GA and discloses both advantages and disadvantages of GA by comparing with other algorithms.
Visualization of Wikipedia categories using Self Organizing Maps shows an overview of categories and their relations, helping to narrow down search domains. Selecting particular neurons this approach enables retrieval...
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This paper studies SofEA, an architecture for distributing evolutionary algorithms (EAs) across computer networks in an asynchronous and decentralized way. SofEA is based on a pool architecture which is implemented us...
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ISBN:
(纸本)9781450311786
This paper studies SofEA, an architecture for distributing evolutionary algorithms (EAs) across computer networks in an asynchronous and decentralized way. SofEA is based on a pool architecture which is implemented using an object store interacting asynchronously with several clients. The fact that each client is autonomous leads to a complex behavior that will be examined in this paper, so that the design can be validated, rules of thumb can be extracted and the limits of scalability found. We will show how, beyond the usual measures employed in EA, specific measures such as the number of conicts across clients can give us hints on the algorithm behavior, and how implementation details can change not only the running time, but also the behavior of the evolutionary algorithm itself. By using these measures we try to find ideal values for parameters such as the simultaneous number of individuals evaluated by a client or the way these are chosen from the pool. Copyright 2012 ACM.
This work introduces a novel access control solution for infrastructures composed of highly constrained devices which provide users with services. Low energy consumption is a key point in this kind of scenarios given ...
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In recent years, embedded systems based on microprocessors have progressed significantly. This fact allows to use powerful operating systems and programming languages with a high level of abstraction which facilitates...
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