Abstract. Following the work of Stephens and coworkers on the coarse-grained dynamics of genetic systems, we work towards a possible generalisation in the context of genetic algorithms, giving as examples schemata, genotype-phenotype mappings, and error classes in the Eigen model. We discuss how the dynamics transforms under a coarse-graining, comparing and contrasting different notions of inva...

Correctly choosing rock-breaking bit is critical in oil drilling. The optimal model of selecting a bit has been established based on the Factor Analysis Theory. Through selecting primitive variables, and using SPSS (Statistical Package for the Social Sciences) to get factor loading matrix, factor rotation and factor score, we have reasonably evaluated and optimized the selection of rock-breakin...

The bit-rock interaction considerably affects the dynamics of a drill string, thus choosing suitable model and identifying its parameters considering uncertainties is crucial. This paper proposes procedure to estimate four models, one which new, at same time select most model, given available field data. approximate Bayesian computation (ABC) used for this purpose. An posterior probability dens...

In this pap er we present the results of simple co-evolut ionary models that simulate the tempora l development of a populati on of interact ing bit strings . Each bit st ring is decoded into funct ional groups called "genes." The indi vidu als participate in a pro cedure similar to t he Darwini an principle, that is, random int eraction (in which the genes det ermine the fitness of an ind ivid...

In this paper, we propose a new lightweight block cipher named RECTANGLE. The main idea of the design of RECTANGLE is to allow lightweight and fast implementations using bit-slice techniques. RECTANGLE uses an SPnetwork. The substitution layer consists of 16 4×4 S-boxes in parallel. The permutation layer is composed of 3 rotations. As shown in this paper, RECTANGLE offers great performance in b...

In this paper, we propose an enhanced method of initializing the quantization parameter (QP) in H.264 rate control algorithm based on image quality balance of GOP (Group of Pictures) using support vector machines (SVMs). Primarily, we analyze characteristics of some typical video sequences by motion vectors. And then we choose four video sequences with different characteristics and computer the...