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Bibliographic Details
Main Author:	Hernán Fajardo Heras
Format:	Artículo científico
Language:	es
Published:	Universidad Politécnica Salesiana 2014
Subjects:	Ingeniería plagio freeLing Detección MultiWordNet plataforma plagio
Online Access:	https://www.redalyc.org/articulo.oa?id=505554817005
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PlaM-DeP: una plataforma modular para el desarrollo y evaluación de algoritmos de detección de plagio académico Hernán Fajardo Heras Manuel Barrera Maura Vladimir Robles Bykbaev Cristian Timbi Sisalima Eduardo Calle Ortiz Ingeniería plagio freeLing Detección MultiWordNet plataforma plagio En este trabajo se presenta un modelo de plataforma de software para desarrollar y evaluar los algoritmos de detección de plagio. La plataforma se basa en un diseño modular escalable, que implementa un con- junto de servicios que posibilitan realizar automática- mente tareas como: análisis sintáctico y semántico a través de WordNet y Freeling, extracción automática de texto de múltiples formatos de archivos (PDF, Word y texto), extracción de contenido de páginas web (empleando algunos motores de búsqueda como Google, Yandex, Yahoo, Bing), el almacenamiento, la carga y el uso de algoritmos de detección de plagio. Estos servicios permiten a un programador desarro- llar el código centrando el esfuerzo en el diseño del algoritmo y la base matemática/estadística. Actual- mente, la plataforma se probó usando varias consultas de texto (n-gramas), y los resultados de rendimiento son prometedores. 2014 artículo científico 1390-650X https://www.redalyc.org/articulo.oa?id=505554817005 es http://www.redalyc.org/revista.oa?id=5055 Ingenius. Revista de Ciencia y Tecnología application/pdf Universidad Politécnica Salesiana Ingenius. Revista de Ciencia y Tecnología (Ecuador) Num.11

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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