منابع مشابه
islanding detection methods for microgrids
امروزه استفاده از منابع انرژی پراکنده کاربرد وسیعی یافته است . اگر چه این منابع بسیاری از مشکلات شبکه را حل می کنند اما زیاد شدن آنها مسائل فراوانی برای سیستم قدرت به همراه دارد . استفاده از میکروشبکه راه حلی است که علاوه بر استفاده از مزایای منابع انرژی پراکنده برخی از مشکلات ایجاد شده توسط آنها را نیز منتفی می کند . همچنین میکروشبکه ها کیفیت برق و قابلیت اطمینان تامین انرژی مشترکان را افزایش ...
15 صفحه اولAnalytic methods for uniform hypergraphs∗†
This paper presents some analytic methods for studying uniform hypergraphs. Its starting point is the spectral theory of 2-graphs, in particular, the largest and the smallest eigenvalues λ and λmin of 2-graphs. First, these two parameters are extended to weighted uniform hypergraphs; second, the eigenvalues-numbers λ and λmin are extended to eigenvalues-functions λ(p) and λ (p) min, which also ...
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In this paper, we define some new homomorphism-monotone parameters for hypergraphs. Using these parameters, we extend some graph homomorphism results to hypergraph case. Also, we present some bounds for some well-known invariants of hypergraphs such as fractional chromatic number,independent numer and some other invariants of hyergraphs, in terms of these parameters.
متن کاملDirected hypergraphs: A tool for researching digraphs and hypergraphs
In this paper we introduce the concept of directed hypergraph. It is a generalisation of the concept of digraph and is closely related with hypergraphs. The basic idea is to take a hypergraph, partition its edges non-trivially (when possible), and give a total order to such partitions. The elements of these partitions are called levels. In order to preserve the structure of the underlying hyper...
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The Regularity Method for hypergraphs is a newly emerging technique that grew out of the famous Regularity Lemma of Szemerédi for graphs [53]. The purpose of this Focused Research Group was to bring together the experts who developed the Regularity Method for hypergraphs with some other leading researchers in extremal hypergraph theory, so that all participants could learn the technical details...
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ژورنال
عنوان ژورنال: Algorithmica
سال: 2015
ISSN: 0178-4617,1432-0541
DOI: 10.1007/s00453-015-9977-x