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Bibliographic Details
Main Author:	Sergio Luis Pérez-Pérez
Format:	Artículo científico
Language:	es
Published:	Instituto Politécnico Nacional 2012
Subjects:	Computación paseos aleatorios sobre gráficas Selección aleatoria de árboles generadores matrices de transición en cadenas de Markov distribuciones de probabilidad en vecindades de vértices
Online Access:	https://www.redalyc.org/articulo.oa?id=61524670008
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Selección aleatoria de árboles generadores en gráficas Sergio Luis Pérez-Pérez Guillermo Benito Morales-Luna Feliú Davino Sagols-Troncoso Computación paseos aleatorios sobre gráficas Selección aleatoria de árboles generadores matrices de transición en cadenas de Markov distribuciones de probabilidad en vecindades de vértices Existen diversos procedimientos para seleccionar aleatoriamente árboles generadores en gráficas conexas no dirigidas, con tiempos esperados de ejecución entre los órdenes y en los peores casos, donde es el número de vértices en la gráfica. En este trabajo realizamos la localización efectiva y eficiente de árboles generadores mediante paseos aleatorios sobre dichas gráficas, con la finalidad de obtener un equilibrio entre el diámetro del árbol, la valencia de los vértices internos y el número de hojas de los árboles obtenidos. Para esto, proponemos el uso de diversas matrices de transición en cadenas de Markov, considerando diferentes distribuciones de probabilidad para las vecindades de vértices involucradas en el paseo aleatorio. 2012 artículo científico 1405-5546 https://www.redalyc.org/articulo.oa?id=61524670008 es http://www.redalyc.org/revista.oa?id=615 Computación y Sistemas application/pdf Instituto Politécnico Nacional Computación y Sistemas (México) Num.4 Vol.16

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// Anecdotal testing Today and Yesterday seems to indicate destroy() // is called by the garbage collector and everything is good. // Something to keep in mind though. return 0; } /** * Write function that is called when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ public function write($sessId, $data): bool { if ($this->writesDisabled) { return true; } return $this->saveSession($sessId, $data); } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ abstract protected function saveSession($sessId, $data): bool; }

* * @return void */ public function writeClose() { // The assumption is that we're using PHP's ext/session. // session_write_close() will actually overwrite $_SESSION with an // empty array on completion -- which leads to a mismatch between what // is in the storage object and $_SESSION. To get around this, we // temporarily reset $_SESSION to an array, and then re-link it to // the storage object. // // Additionally, while you _can_ write to $_SESSION following a // session_write_close() operation, no changes made to it will be // flushed to the session handler. As such, we now mark the storage // object isImmutable. $storage = $this->getStorage(); if (! $storage->isImmutable()) { $_SESSION = $storage->toArray(true); session_write_close(); $storage->fromArray($_SESSION); $storage->markImmutable(); } } /** * Attempt to set the session name * * If the session has already been started, or if the name provided fails * validation, an exception will be raised. * * @param string $name * @return SessionManager * @throws Exception\InvalidArgumentException */ public function setName($name) { if ($this->sessionExists()) { throw new Exception\InvalidArgumentException( 'Cannot set session name after a session has already started'

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