Normal residual is one of the usual assumptions of autoregressive models but in practice sometimes we are faced with non-negative residuals case. In this paper we consider some autoregressive models with non-negative residuals as competing models and we have derived the maximum likelihood estimators of parameters based on the modified approach and EM algorithm for the competing models. Also,...

On the basis of the polyclonal selection algorithm, an improved polyclonal selection algorithm based on negative selection is put forward in this paper. Inspired by the diversity and auto-tolerance of the negative selection, the population diversity is increased by the clone deletion and clone supply to improve the polyclonal selection algorithm. Finally, the optimization design of the crane bo...

The Negative selection Algorithm (NSA) is one of the important methods in field Immunological Computation (or Artificial Immune Systems). Over years, some progress was made which turns this algorithm into an efficient approach to solve problems different domain. This review takes account these signs during last decade and categorizes those based on characteristics performances. Our study shows ...