Advanced Materials Research Vols. 631-632

Abstract: According to the invariance property of the BCH code and Euclidean algorithm to calculate the greatest common factor (GCF) between code group and its cyclic shift code group. There is a method by using the degree distribution probability sum function of the greatest common factor to recognize the code length of BCH code. On this basis, the GCF can be extracted of the greatest degree distribution probability from the sum function, with the generator polynomial obtained by decomposing the GCF. The simulation results show that this method can achieve the recognition probability above 95% with BER of 4×10-3，and the high BER is much better to recognize the short codes.

Abstract: A Secure Strategy for Location-Based Wireless Sensor N A cluster-based secure strategy for wireless sensor networks is proposed. The two-dimension sensing area comprises a number of clusters, each of which contains four small squares called cells. The WSNs structure is a two-layer structure. The upper layer consists of all cluster heads and the lower layer consists of all ordinary sensors managed by their cluster heads. The cluster heads establish their pairwise keys through utilizing a key pre-distribution scheme based on cluster head identifications and the ordinary sensors establish their pairwise keys through employing a dynamic key management strategy based on exclusion-based systems (EBSs). Analysis and comparison show this scheme enhances the WSNs security, decreases WSNs communication consumption, saves cluster head and sensor energy expenditure, and prolongs the lifetime of both cluster heads and ordinary sensors.etworks

Abstract: An efficient pre-processing algorithm for removing uniform noise is proposed. Local image statistic information and human visual perception are used to classify the pixels in the filter window. According to the elements number of each cluster, all pixels are divided to noise-free clusters or fuzzy clusters. Through cluster method, almost all noise pixels are identified and then restored. Finally, we choose some commonly used filters to test our algorithm. The experimental results tell that our approach can enhance those filters’ capability of suppressing impulse noise effectively. Due to the proposed algorithm can decrease the noise density effectually and keep image details, it can be introduced into many existing uniform noise filtering techniques.

Abstract: The outline is one of the easiest and immediate methods to expresses people’s image of object, records and acquires the inspiration and the design that will be lost during a wink. The 3D modeling based on the outline adopts the computers’ strong power of technologies to sculpt. It demands not only grasping the NURBS and the polygon modeling technology, but also the sound sculpting base and good understanding of the space structure. To the 3D modeling method based on the irregular outline, this paper analyzes an a-ka role model, come up with the modeling method of 3D geometry reference, and make the a-ka model with this method. At last the model through the fit designing program is finished.

Abstract: This paper clarifies the basic idea of design and construct for non-isomorphism block. The method of using standard edge matrix to structure block design is proposed, the whole process to design and construct (14, 8, 7, 4, 3) and (18, 9, 8, 4, 3) is introduced. It uses the side of each column of the standard edge matrix exactly, and also constitutes a complete graph by arranging the edge of complete graph to the initial matrix and re-arranging it to the standard edge matrix. According to the set of edge in standard edge matrix, 14 blocks of designing (14,8,7,4,3) and 18 blocks of designing (18,9,8,4,3) are obtained. Finally, it proved the number of design non-isomorphism (14, 8, 7, 4, 3) is 5, and (14, 8, 7, 4, 3) is 1.

Abstract: Digital factory is a new form of organization of production. To meet the urgent needs of three-dimensional digital design and manufacture in business, the paper put forward the new digital factory concept and foundation .On the based of MBD(Model based Definition) , the phase of integrated design information, process information and manufacturing information were integrated, the data, organizational model were researched, which realized he paperless management of digital design and manufacturing. Finally, the practical application was the validation to theoretical in an enterprise. The results showed that digital factory achieved the optimal management of product design and manufacturing process.

Abstract: In this study, the Adomian's decomposition method (ADM) is applied to the STF system. This method has been tested on the STF system which is a three-dimensional system of ODE with quadratic nonlinearities. A computer based Matlab program has been developed in order to solve the STF system. Chaotic and non-chaotic behavior of the system has been analyzed graphically and finally a comparison as well as accuracy between two systems has been made in two-step sizes with detail.

Abstract: To enhance the rate of lumber cutting output and save the production cost, a new intelligent manufacture system is developed. Considering the requirements of wood surface defects detection and optimal layout, the overall structure is established. The system has six function modules, there are cutting task module, laser scanning images processing module, defects identify module, optimal layout module, machining plan module and data manage module. According to laser scanning, images processing and defects identify programs help manufacturer to get profile data, acquire profile image, extract features, and identify lumber defects. Optimal layout module gives an intelligent program to decide the maximum number of cutting board pieces and shows operator the visualized layout. Two examples are shown which apply algorithms to obtain the optimal layouts for lumber cutting. The intelligent manufacturing system helps people detect lumber defects, make the optimal machining plan and cutting material online quickly.

Abstract: I proposed a method of using full-custom design 32 × 32 multiplier to enhance performance, reduce the power consumption and the area of layout. I use improved Wallace tree structure for partial product compression, truncated beyond the 64 part of the plot and the look-ahead logarithmic adder using Radix-4 Kogge-Stone tree algorithm raise the multiplier performance. In the design of Booth2 encoding circuit and compression circuit, I use a transmission gate logic design with higher speed and smaller area. I also use Euler path method and heuristic Euler path method to reduce the layout area. The design use SMIC 0.18μm 1P4M CMOS process, with a layout area of 0.1684mm2. In a large number of test patterns, simulation results show that the computation time of a 32 × 32 multiplication is less than 3.107ns.

Abstract: A new aerobics intelligent motion capture system using MEMS is proposed based on analyzing key technology of recent human motion capture system which is most benefit for intelligent tutoring system. Architecture of aerobics intelligent motion capture system is designed. And core technology solutions of the system including large-scale aerobics tutoring and training motion data obtain system, multi-position micro-electro-mechanical sensors system based on wireless network and multi-source data fusion and processing system with high-frequency real-time data transmission system are put forward.