Abstract In this document, we study the construction of codes LDPC quasi cyclic based on a protograph. In addition to their large perimeters, the presented codes take profit from the advantages of bass coding and decoding complexity. The aim of this article is to make an improvement on the implementation of quasi-cyclic LDPC codes. Thus to respect the structure of the... In this document, we study the construction of codes LDPC quasi cyclic based on a protograph. In addition to their large perimeters, the presented codes take profit from the advantages of bass coding and decoding complexity. The aim of this article is to make an improvement on the implementation of quasi-cyclic LDPC codes. Thus to respect the structure of the basic protograph we use an arithmetic progression to determine in advance the positions of certain nodes of control in the derived graph, which turn to some extent amounts generating a new model while proceeding to an enlarging of the basic protograph. Once this new model conceived we apply the usual techniques to build in an optimal way the derived graph. Read More Read Less

Abstract In this paper, we present a method of segmentation of the images colors by leaning on the statistical nature of the image. This method is designed to answer the problem of detection road signs in an image taken by means of a sensor embarked on a vehicle on natural conditions. The presented method exploits only the information of color type,... In this paper, we present a method of segmentation of the images colors by leaning on the statistical nature of the image. This method is designed to answer the problem of detection road signs in an image taken by means of a sensor embarked on a vehicle on natural conditions. The presented method exploits only the information of color type, whose new presentation of color we give by means of a statistical entitled technique “Principal Component Analysis” to have a strong uncorrelatedness between the components establishing the space of color. Read More Read Less

Abstract The work presented in this article is interested in a modeling of a humanoid robot. A new approach based on the synthesis of previous work and the analysis of human walking is proposed. The prototype is a humanoid robot designed to 18 DOF divided by six DOF in the arm, five DOF in the foot and a height of 172... The work presented in this article is interested in a modeling of a humanoid robot. A new approach based on the synthesis of previous work and the analysis of human walking is proposed. The prototype is a humanoid robot designed to 18 DOF divided by six DOF in the arm, five DOF in the foot and a height of 172 cm of a humanoid. The modeling approach chosen is the Denavit Hartenberg, we considered the kinematic chain as a simple joint chain .In this paper, we will present the mechanical construction, direct geometric modeling, inverse geometric modeling and animation in building an upper humanoid robot in virtual environment. Read More Read Less

Abstract The QRS complex of the ECG signal is the reference point for the most ECG applications. In this paper, we aim to describe the design and the implementation of an embedded system for detection of the QRS complexes in real-time. The design is based on the notorious algorithm of Pan & Tompkins, with a novel simple idea for the decision... The QRS complex of the ECG signal is the reference point for the most ECG applications. In this paper, we aim to describe the design and the implementation of an embedded system for detection of the QRS complexes in real-time. The design is based on the notorious algorithm of Pan & Tompkins, with a novel simple idea for the decision stage of this algorithm. The implementation uses a circuit of the current trend, i.e. the FPGA, and it is developed with the Xilinx design tool, System Generator for DSP. In the authors’ view, the specific feature, i.e. authenticity and simplicity of the proposed model, is that the threshold value is updated from the previous smallest peak; in addition, the model is entirely designed simply with MCode blocks. The hardware design is tested with five 30 minutes data records obtained from the MIT-BIH Arrhythmia database. Its accuracy exceeds 96%, knowing that four records among the five represent the worst cases in the database. Read More Read Less