Advanced Materials Research Vols. 605-607

Abstract: With the development of the city, the traffic congestion and traffic accidents on the urban road increase frequently. Using traffic modeling and analysis to improve the traffic conditions become more important. Now, using the traffic flow model to study the traffic problems has made many achievements. However, traffic flow model cannot be a good choice for describing the relations of the traffic element at a specific moment, but these relations are indeed significant for forecasting traffic status from that moment on. In this paper, a graph model for the static traffic was studied, and then analyzed the feature of a graph substructure for traffic congestion at one moment. We propose an effective frequent subgraph mining algorithm to find the frequent substructure that represent traffic congestion status in a graph. Our mining algorithm can enhance the efficiency of finding the congestion subgraph. Analyzing the proportion of the congestion subgraph in a graph for traffic to forecast the traffic status at that moment later, thus to find ways to improve traffic conditions.

Abstract: This article does a further research on the technologies of cloud computing and intelligent public transportation, designs a human-centered intelligent public transportation system, improves the connection between passengers and vehicles, vehicles and vehicles. Technologies of BeiDou messaging, capacity sensor, RFID and Web are used to improve the intelligence of public transportation information platform. This article makes an architecture design in intelligent transportation based on cloud computing and uses the embedded system as the core. The architecture allows passengers to obtain needed vehicles’ information through various services whenever and wherever, and strongly supports intelligent control and schedule of multi-vehicles and multi-lines. The system lays a good foundation for the intelligent city.

Abstract: With the development of information technology and business model innovation, cloud computing has become a new user experience and business model. This paper first introduced the concept of cloud computing features and cloud computing system architecture, and then as the private cloud data center applications in colleges and universities an example, analysised the value of private cloud for the university data center, private cloud key technology and implementation details, and finally Indicates that a private cloud computing the future development trends and the application mode of school-enterprise cooperation private cloud.

Abstract: Nowadays, document retrieval was an important way of academic exchange and achieving new knowledge. Choosing corresponding category of database and matching the input key words was the traditional document retrieval method. Using the method, a mass of documents would be got and it was hard for users to find the most relevant document. The paper put forward text quantification method. That was mining the features of each element in some document, which including word concept, weight value for position function, improved weights characteristic value, text distribution function weights value and text element length. Then the word’ contributions to this document would be got from the combination of five elements characteristics. Every document in database was stored digitally by the contribution of elements. And a subject mapping scheme was designed in the paper, which the similarity calculation method based on contribution and association rule was firstly designed, according to the method, the documents in the database would be conducted text clustering, and then feature extraction method was used to find class subject. When searching some document, the description which users input would be quantified and mapped to some class automatically by subject mapping, then the document sequences would be retrieved by computing the similarity between the description and the other documents’ features in the class. Experiment shows that the scheme has many merits such as intelligence, accuracy as well as improving retrieval speed.

Abstract: With the rapid development of multimedia technology, multimedia teaching, as an advanced teaching method, is widely used in teaching, and leads teaching reform of colleges and universities. Multimedia teaching software greatly improves class effect by graphic illustrations and combination of dynamics and statics. But now there are also some problems about multimedia teaching software, such as poor universality, simple design, electronic blackboard, lack of artistry and interactivity, the paper puts forward evaluation principles and three-level evaluation index system of multimedia software for teaching, which have some reference value and realistic significance.

Abstract: Identity management systems in Internet belong to different circles of trust and it is difficult to set up trust relationship among Identity Providers (IdPs) or Service Providers (SPs) which are located in different circles of trust. This paper proposes a distributed trust federation framework to solve the problem and its efficiency is analyzed with several experiments. It uses IdPs which belong to multiple Circles of Trust (CoTs) as relay entities to set up trust relationship among CoTs. The proposed framework is effective to extend the trust federation of identity management systems and thus improve easy of use for users in Internet..

Abstract: Teaching method of project is a teaching activity through the implementation of a project. Operating systems course is a highly theoretical course, and there are some problems using traditional teaching methods. The teaching method of project combines theory and practice of teaching in the classroom. Through assistance of the demonstration system and virtual experimental platform, this trains students’ ability to solve practical problems and improves the overall effectiveness of teaching.

Abstract: Under the premise of the software trustworthiness’s understanding is in the grey level, the Software Trustworthiness Measurement get many people’s attention. Use normal method to complete software trustworthiness measure is very hard. By deeply research on the Grey Relational Analysis (GRA) and Software Trustworthiness Measurement Indicator Systems, this paper brings up the Software Trustworthiness Measurement algorithm based on Grey Relational Analysis (GRA), and gives out instances. Experiments showed that this algorithm has theoretical and practical values.

Abstract: Propose an information hiding method to embed information into the FIB, directory structure, short stream, Document Summary Information stream and Data stream of Microsoft Office Word, Excel and PowerPoint documents. Experiment results show that the method has high volume of information hiding and good invisibility. The maximum information hiding rate can reach 30 percent. As the robustness of this algorithm is to be improved, the algorithm can be just applied to detect the change of the original document.