Alireza Yari

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Automatic document classification due to its various applications in data mining and information technology is one of the important topics in computer science. Classification plays a vital role in many information management and retrieval tasks. Document classification, also known as document categorization, is the process of assigning a document to one or(More)
Identifying topics and concepts associated with a set of documents is a critical task for information retrieval systems. One approach is to associate a query with a set of topics selected from a fixed ontology or vocabulary of terms. The core idea of this research is using Wikipedia articles and associated pages to make a topic ontology for this purpose.(More)
Statistical n-gram language modeling is applied in many domains like speech recognition, language identification, machine translation, character recognition and topic classification. Most language modeling approaches work on n-grams of words. In this paper, we employ language models classifier based on word level n-grams for Persian text classification. The(More)
Prevalent use of human language in computer systems and language oriented document processing, especially in the web, caused creating the need of designing mechanisms for developing natural language processing. In this paper, a survey in Natural Language Processing Laboratory has been done and a proposed framework for its development is suggested. Achieving(More)
Accumulation of existing web documents on the Internet from one side and rapid changes of these pages and their exponential growth made their manually organizing and retrieving almost impossible. Therefore it is necessary to have a system that can automatically put these pages into the related classes to provide their results for the applied tools to be(More)
Today the Internet in almost all ethnic groups and cultures is found and the Web pages are developing very quickly in most countries and different languages. Considering the size and incoherent available information in the Internet has made the use of search engines obvious and necessary. Since search engines pay less attention to the linguistics and(More)
The need for Information Security in organizations, regardless of their type and size, is being addressed by emerging standards and recommended best practices. The various standards and practices which evolved in recent years and are still being developed and constantly revised, address the issue of Information Security from different angles. This paper(More)
For the first incumbent operator it is very important to understand how to react when the second operator comes to the market. In this paper which is prepared for preliminary study of GSM market in Iran, we have studied five MENA markets according to the similarity point of view. This paper aims at analyzing the impact of second entrants in selected markets(More)
Using current systems together and integrate them with new ones is necessary for rapid and optimum development of web based systems. Increasing the volume and growth rate of Web information, beside of the current developments in Information Retrieval media shows the importance of developing and improvement of these systems. In this paper, a cheap, simple(More)