Advanced Materials Research Vols. 424-425

Abstract: In this paper，lower polyethylene(LDPE) was melt to graft maleie anhydride (MAH) in reactive extruder by using dicumyl peroxide(DCP) and benzoyl peroxide(BPO) as the initiator. It can be found that MAH has been grafted to LDPE large molecular chain using by infrared spectrum and graft rate measurement. Orthogonal experiments were employed to confirm the influences of initiator, MAH and LDPE. The results showed that the reaction graft ratio firstly increased，then began to decrease with the increasing of the contents of MAH and initiator. The maximum shear strength was at 2.12MPa when graft polymer was used to adhesive the board of aluminum and polyethylene. The graft rate of graft polymer was at 15.68%.

Abstract: The combination of image features with singular value decomposition algorithm and digital watermarking algorithm based on wavelet transform respectively makes possible the advancement from pixel watermarking to content watermarking, which effectively solves the contradiction between perceptibility and robustness of conventional watermarking algorithm. Therefore, stronger robustness and lower perceptibility of watermarking are achieved. This paper first gives a review on conventional singular-value-decomposition-based digital watermarking algorithm, and then makes a thorough analysis of its respective features, advantages and defects. Improved feature extraction schemes of digital watermark which combine image features with SVD algorithm as well as the application algorithm in feature extraction based on improved SVD algorithm are put forward for the comparative analysis of corresponding principles and processing effects. The experimental results indicate that the content-based (instead of pixel-based) watermarking algorithm can better satisfy the perceptibility and robustness of digital watermarking, with huge application potentials and more development space

Abstract: The Firing Tables Compiling of a new type of the very low altitude interception device is studied in this paper. Based on the analysis of drag coefficient identification during the date processing of the Firing Tables experiment, and the theoretical trajectory correction, then according to the defects of the traditional methods for the Compilation of Firing Tables, a new method of determining the correction data is developed which replaces the simple data with the correction function. This method will reduce the error to an obvious degree.

Abstract: Increasing the velocity and distributing density of fragments through asymmetrical initiation is an efficient way to improve the damage capacity of warheads. This paper will do research on warhead with double layers of fragments under asymmetrical initiation and analyze how the thickness of charge between the two layers will affect the velocity and distribution of directional fragments. Compared with single layer fragments under symmetrical initiation, if the thickness between the two layers is properly disposed, double layers fragments under asymmetrical initiation can double the density of fragments and get a higher fragment velocity in the definite direction simultaneously, which will improve the damage capacity of warheads

Abstract: The paper presents a method used to model rock as continuous media with discontinuous joints. The Monte-Carlo method is employed in simulating the joint network of jointed rock mass based on certain principles, and the calculation method on the mechanical persistence ratio is studied, furthermore, some research on the influential factors on the persistence ratio is performed, and the values of some empirical parameters are obtained, which assured the stability of the results.

Abstract: From analyzing the characters of depth first search algorithm， we proposed a new map coloring algorithm. The proposed algorithm overcomes the disadvantage of other algorithms in the field of Map-coloring, and the results show that the proposed algorithms can solve the problem of coloring administrative map efficiently and obtain optimal solutions

Abstract: It is generally recognised that bioinformatics analysis plays a important role in the study of genes and proteins. Here in this article we intend to report some bioinformation about the nucleotide sequence of DEV(Duck virus enteritis）US2 gene.We used DNAstar7.1 software、Primer5.0 and some online websites (e.g.NCBI、BepiPred)to analysis the potential bioinformation in nucleotide of this gene. These results indicated that DEV should be placed in a single cluster within the subfamily Alphaherpesvirinae,and nucleotide sequence of DEV-CHv US2 have 100% similarities with other six strains of DEV US2 gene sequences with sequence alignment and so on.To date,little information on DEV US2 gene has been found,so we provide some materials information for further research.

Abstract: With the development of Electronic Business, It is very necessary to optimize EB platform based on dynamic cache. Based the features and performance requirements of EB site, we can set a cache server in front of Web server to speed up the response speed of user access by the dynamic content caching; and through certain strategies to ensure that the replacement and updating of the content from user is the latest, it will improve Web server running under the peak load capacity, and reduce latency dynamic content access, so it is a good solution to optimize EB platform.

Abstract: In this article,we intend to provide readers with some bioinformation of DEV Us2 protein,for little information of this protein has been cited online.Us2 protein encoded by the DEV-US2 gene is one of the DEV tegument proteins. Like most members of the alphaherpesvirinae,the genes in the US region of its genome are well conserved,which means that both the major DEV protein Us2 and alphaherpesvirinae protein Us2 possess the similar functions.Us2 protein sequence analysis indicates that the protein possesses typical characteristics of tegument protein.The precursor Us2 consists of 239 amino acids and exhibits a molecular mass of 34 kDa. In conclusion,all the datas and consequences will provide a basis for further functional study of the DEV-Us2 protein and provide necessary datas for the new type clinical diagnosis of DEV and the development of new DEV vaccine.

Abstract: This paper proposes a new feature recognition framework based on extensible rules, dividing recognition into two steps of extraction of model information and matching manufacturing features. The model information contains geometrical information and non-geometrical information. A new concept of mate rule and a neutral platform are introduced in matching of manufacturing features. Matching templates are established by combining mate rules in the neutral platform. Manufacturing features are recognized by matching geometrical information with templates. Attributes of manufacturing features are obtained from restructured non-geometrical information. The process and result of recognition is represented through a shaft part.