The prime focus in artificial intelligence is on creating machines that can exhibit some form of intelligence. Accurate mathematical models neither always exist nor can they be derived for all complex environments because the domain may not be ...

Document re-ranking is a middle module in information retrieval system. It’s expected that more relevant documents with query appear in higher rankings, from which automatic query expansion can benefit, and it aims at improving the performance of the ...

Automatic indexing is the foundation and core technology of automatic documents processing. Currently most of the documents don’t have Keywords, and manual indexing consumes too much time and laborious, it is also highly subjective. This paper discusses ...

Data mining techniques have been successfully applied in intrusion detection because they can detect both misuse and anomaly. One of the unsupervised ways to define anomalies is by saying that anomalies are not concentrated, which depend on the density ...

Enlightened by the knowledge of ecological environment and population competition, we proposed a Competitive Coevolutionary Genetic Algorithm (CCGA) based on ecological population competition mode for multiobjective optimization problems. In the ...

A traditional PID regulator is usually used to control water level of pressurizer in modern reactors. For such a non-linear and complex time-varying control system, PID regulator is often shown by the large amount of overshoot and long setting time ...

Metamodels based on responses from designed (numerical) experiments may form efficient approximations to functions in engineering analysis. They can improve the efficiency of Engineering Optimization substantially by uncoupling computationally expensive ...