With the development of VLSI and further richer available on-chip resources, a new challenge in the research field of computer architecture is how to transform the increment of resources into actual promotion of computing power. However, the traditional architecture such as superscalar and VLIW is hard to scale,due to increasing wire delay and design complexity
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Software testing is the key technology to guarantee the software quality and reliability. In recent decade, along with the development of software technology and the increase of the software system scale, the software becomes more complex, and therefore software testing is becoming more and more important. Currently, software testing has become the research focus.Various specific
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With the development of computer and Web technology,more and more information is stored and transmitted by them.On the aspect of information storage the relational database is one of the most mature and the most widely-used technology, while XML provides an excellent intermediate-tool to exchange data.For the application process of using XML as a format of
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Low utilization efficiency of spectrum, which is caused by fixed spectrum allocation scheme, is the bottleneck of wireless communication systems. The Cognitive Radio (CR) technology is proposed by Joseph Mitola and refers to a smart radio that has the ability to sense the external environment, learn from the history and make intelligent decisions to adjust
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With the rapid development of computer software and hardware, high-performance computing has been gradually applied to an increasing number of fields. Parallel computing is an important technical way to achieve high performance. Parallelization for serial pro-grams, a significant method of parallel computing, can be mainly divided into three parts: dependency analysis, alias analysis, and data
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Nowadays, as the software scale enlarging and the requirement changing frequently, to develop software becomes more and more complex. The idea of Agile Programming reduces the workload for developers in a certain way. But when the schema of database on which application relies changes, developers always have to investigate all code to find where the
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With XML becoming standard for data representation and exchange on the Web, XML data is enhancing greatly by Web exchanging and processing data , it requests more to XML database schema. Similar to relational database, if XML schema designing is not good, it will cause abnormity for inserting, deleting and updating data too. The harm
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With the rapid development of the Internet, a large number of Web data emerges on the Internet. The Web data formats as XML documents. It becomes an important research topic of database, how to store effectively and process large XML documents, and how to retrieve information from them. The research work in this thesis revolved
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As important data stored center of information systems, database has always been attack target. Traditional prevention and protection centric database security mechnisms, such as cryptography, identification, access control, firewall and multi-level security mechinisms, put emphases on inspection of user identification and permission constraints, and can not prevent all attacks and abuses of inner normal users.
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Evolutionary Testing (ET) is an emerging and promising technology for automatic test data generation. The main idea of ET is to reformulate the problem of test data generation as an evolutionary search, and then the test data can be generated with the help of evolutionary algorithm.In ET, the test data generation process is guided by
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