Applied Mechanics and Materials Vol. 610

Abstract: Volume rendering is a kind of important technology of 3D data volume rendering, which can display the internal structures and the shapes of the data cubes more vividly than the surface rendering and the technique for surface extraction from a volume. However, volume rendering algorithm is very complex, in order to solve the efficient problem of volume rendering of massive data,this paper introduces the real-time volume rendering technology which is based on GPU acceleration, and puts forward a method of fast hybrid volume rendering based on FBO to solve the problem that the data and the conventional primitives can be rendered on the same screen. At present, this method has been applied to the three-dimensional geological interpretation of comprehensive mapping system, which realizes that the three-dimensional attribute body and stratigraphy, fault surface can be shown at the same time, and improves the quality and efficiency of the interpretation work.

Abstract: With the "Digital Earth" concept being put forward, people are starting to focus on geospatial information technology. Traditional manual building modeling process is gradually eliminated by history due to cumbersome and inefficient work. With massive data storage and processing technologies emerging and improving, people begin to explore building point cloud data measured by laser radar technology and to use point cloud data processing software for further building boundary extraction. In the model boundary extraction process, the use of prototype with the model fit is a good, clear and easy programming algorithm and triangulation algorithm.

Abstract: There are a variety of different scripts in the world. Almost every country have there own languages and scripts which can distinguish from each other in different aspects. It is very essential to identify different scripts in multi-lingual, multi-script document. In recent years, different kinds of approaches have been developed for script identification and gotten promising results. In this paper, an overview of the script identification is proposed under different categories: script systems, extracted features and classification methods. Earlier researches and future property of this field is discussed. It is very obvious that, the research in this area is not so satisfied and still more research is to be done.

Abstract: While the rapid development of Internet technology and communication technology, SSL VPN (security socket Layer Virtual Private Network) as a new remote access technology about network application layer, not only based on the proven SSL protocol, but meet the needs of most of network users. In recent years, enterprise networks have been widely used. However, due to its structure so that all access and calculation must be processed through VPN service, which appeared insufficient memory, computing speed to keep up with other issues. This article proposed some improvement based on these issues, using the improved algorithm to encrypt the ellipse. Keywords- SSL; VPN; Ellipse algorithm

Abstract: Aiming at the problems of extremely sparse of user-item rating data and poor recommendation quality, we put forward a collaborative filtering recommendation algorithm based on cloud model, item attribute and user data which combined with the existing literatures. A rating prediction algorithm based on cloud model and item attribute is proposed, based on idea that the similar users rating for the same item are similar and the same user ratings for the similar items are similar and stable. Through compare and analysis this paper’s and other studies experimental results, we get the conclusion that the rating prediction accuracy is improved.

Abstract: Windows 8 is the latest release of Microsoft operating system, the user interface, function and safety have been greatly improved. The user privilege has played a part in operating system security, which can greatly prevent worm programs. The Windows 8 privilege management inherits from Windows Vista’s UAC (User Account Control) system and improved it. Now there are two types of method to elevate user privilege, one is aim at the UAC in Ring 3 mode, the other is attack the kernel of operating system in Ring 0 mode. This paper is primarily analyzing and testing these methods.

Abstract: Due to the special nature of electronic data, we need to create a complete copy of the raw disks before computer forensics. There is two ways to create a copy. One is copy from Disk to disk, another is disk mirroring. The former capacity of the copy disk has fixed while image file of the latter is highly compressed already. Neither any of them can add the forensic analysis evidence; it will be handed over to the court as a whole set of evidence. This will affect the completeness and admissibility of the evidence. In this thesis, we will take the disk mirroring and storage technology into consideration by using the Compound Document storage technology, by this way we can add the evidence into the evidence copy which makes an “evidence gathered” effect. At the same time, it can highly compressed the original evidence, save the capacity and ensure the safety of the data.

Abstract: Dongba hieroglyph among Naxi ethnic minority is the only globally recognized hieroglyph still in use. Dongba ancient manuscripts are registered on the list of Memory of the World by UNESCO. In order to secure the inheritance and communication of Dongba Manuscripts, we analyze the obstacles encountered in the process of inheritance and communication. We apply IT to construct a digital and network-oriented international Dongba Manuscripts information sharing platform to collect, sort out, extract and disseminate digitalized information of Dongba Manuscripts hieroglyph. Environment and technology support should be provided to carry out remote academic research and exchanges through the international sharing platform. Efforts should be made to seek digital channels to rescue and inherit Memory of the World, Dongba Manuscripts.

Abstract: Multiple-valued logic is an extended form of Boolean logic. In daily life, people often encounter the problem about the multiple-valued logic. With further study on Boolean logic, multiple-valued logic has been paid more and more attention by researchers. This paper achieves the operation of AND gate in three-valued logic by using the DNA hairpin structure. The experiment makes the DNA hairpin structure as the basic structure, and the molecular beacon as the input signal, and at last judges the logical results according to the intensity of fluorescence and gel electrophoresis. This method has the advantages that it has high sensitivity, good feasibility, and it is easy to observe. In addition, this method reduces the hybrid competition to a certain extent, and it is a new attempt to the research on multiple-valued logic.

Abstract: In this paper, on the basis of in-depth study of data warehouse, OLAP, data mining and other key technologies, according to the characteristics of the Jpeen customer relationship management (Jpeen_CRM), developed a Web-based customer relationship management system. First of all, research the demand for Jpeen company and create Jpeen_CRM data warehouse. Second, create the OLAP multidimensional cube which is applied to the analysis of customer transactions. Using the decision tree algorithm to create mining models for customers to choose glasses, and gives pruning optimize decision tree. Using decision tree to classify users and recommend them the hot products they prefer. Finally, realize the Jpeen_CRM on J2EE platform, provide a decision support for Jpeen company to better serve customers and make the company itself have the advantages in a competitive environment.