Abstract:This paper proposes a two-dimension numerical representation of protein, which considers the symmetry of nucleotides in the double helix structure of the DNA sequence and the composition rule of nucleotides of the codon. Cosic’s one dimensional resonant recognition model (RRM) is a physico-mathematical model. The RRM uses signal processing method to indentify the information of protein sequence. Combined the two-dimensional numerical representation of protein with the Fourier transform theory of vector sequence, we put forward the higher-dimensional resonance recognition model (HD-RRM). The results show that the two-dimensional numerical representation proposed and the HD-RRM are effective when they are applied to distinguish the similarity of dual protein sequences.

Abstract:In order to improve the performance of cumulant-based identification algorithm existing timing error, a modified algorithm which has better stability and higher recognition probability is presented. Firstly, model of mixed signals is used in cumulant expression. Then, effects of unknown parameters, such as over sampling ratio, timing error and based-band pulse-shaping function are all analyzed quantitatively. Further, an improving method which can reduce the effects of factors that affect performance of recognition obviously is given. The experiment results show the validity of the modified algorithm.

Abstract:Deploying vertical linear array in deep-sea being of excellent hydrological conditions has great significance for passive localization. But existing equipment’s structural pressure resistance and deployment difficulties make the sea trial impossible. Deep-sea behaviors in the same acoustic environments with anechoic tank, which makes it’s feasible for similar experiments using shorter linear array in anechoic tank. Firstly, the setting of two crucial parameters, precision of time delay estimation and array aperture, are demonstrated to provide reference for designing vertical linear array and tank similar experiment platform. Secondly, experiment approach and the method of processing experiment data are presented. Lastly, using experiment data, this paper forecasted localization precision and effective distance performance of vertical linear array deployed in deep-sea.