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Bibliographic Details
Main Author:	Yolanda Llosas Albuerne
Format:	Artículo científico
Language:	es
Published:	Universidad de Oriente 2005
Subjects:	Ingeniería Matriz DAFO redes neuronales control de procesos
Online Access:	https://www.redalyc.org/articulo.oa?id=445543748008
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COMPARACIÓN DE LAS FORTALEZAS Y DEBILIDADES DE LOS ESQUEMAS DE CONTROL DE PROCESOS CON REDES NEURONALES Yolanda Llosas Albuerne Jorge Pardo Gómez Margarita Goire Castilla Mónica Mulet Hing Ingeniería Matriz DAFO redes neuronales control de procesos En este trabajo se realiza la conformación de la matriz DAFO para cada uno de los cuatro casos planteados, es decir, los dos estudios basados en el control de hornos aplicando las RNA en la Fábrica de Cemento “José Mercerón”, y los dos que corresponden al horno de precalentamiento F101 de la Refinería de Petróleo “Hermanos Díaz” de Santiago de Cuba, de los cuales se hace una comparación a partir de los objetivos. 2005 artículo científico 0041-8420 https://www.redalyc.org/articulo.oa?id=445543748008 es http://www.redalyc.org/revista.oa?id=4455 Tecnología Química application/pdf Universidad de Oriente Tecnología Química (Cuba) Num.3 Vol.XXV

if (filemtime($filename) + $maxlifetime < time()) { unlink($filename); $count++; } } return $count; } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ protected function saveSession($sessId, $data): bool { $sessFile = $this->path . '/sess_' . $sessId; if ($handle = fopen($sessFile, 'w')) { $return = false; // Lock the file for exclusive access to avoid issues with multiple // processes writing session simultaneously: if (flock($handle, LOCK_EX)) { $return = fwrite($handle, $data); // Make sure that there's no trailing data by truncating the file to // the correct length: ftruncate($handle, strlen($data)); fflush($handle); flock($handle, LOCK_UN); } fclose($handle); if ($return !== false) { return true; } } // If we got this far, something went wrong with the file output... // It is tempting to throw an exception here, but this code is called // outside of the context of exception handling, so all we can do is // echo a message.

// 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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