Applied Mechanics and Materials Vols. 220-223

Abstract: In order to identify potential and effective intrusion detection rules, and improve the detection rate of intrusion detection system, this paper combines the concept lattice with intrusion detection technology and proposes a anomaly intrusion detection system based on concept lattice theory. The system first pre-treats those collected data, regulates data and builds concept lattice using the minimal set of attributes which are obtained by attribute reduction. And it analyzes the implication relations between concepts and obtains non-redundant classification rules. The anomaly intrusion detection model based compared with other tests can easily get training data. Experimental results show the model reduces the computation amount to achieve classification, improves the intrusion detection rate and effectively controls the false detection rate.

Abstract: Focused on the disadvantages of some current constrained optimization algorithm, glowworm swarm multi-objective optimization algorithm ( GSMOA） is proposed in this paper. The main character of this algorithm conforms to feasibility rules and adapts self- adaptive penalty function to search feasible solutions. This algorithm has been tested on 4 standard functions and it shows that the proposed algorithm has more advantage in the convergence rate and the solution precision.

Abstract: The contour point interpolation, contour tracking, contour connection, and linear iterative curve fitting algorithms were studied by the grid method. Emphasis was on solving the degenerate points and ambiguous contour line connection problems. The results show using these methods can accomplish smooth contour drawing based on discrete data points.

Abstract: In RFID system, reducing the frequency of collisions is very important for fast tag identification. In this paper, we proposed a pre-split anti-collision algorithm based on binary tree algorithm. The proposed scheme pre-splits the tags into different groups before the reader detects the first tag. Simulation results indicate that the modified algorithm can achieve much better performance than the conventional one.

Abstract: Considering the weaknesses existing in the present topic crawling strategies, this paper puts forward a new method which is based on Wikipedia and the analysis of page similarity. Firstly, the topic is described via Wikipedia. Then, handle the downloaded web. Finally, calculate the priorities of the links through text relativity and analysis of the web links. The result indicates that this new method is better than the traditional in terms of searching results and topic relativity and is worth popularizing.

Abstract: Clips classification, Hierarchical tree, low-level descriptors. Video sections Abstract. In this paper, we propose an approach with hierarchical tree for clips classification in broadcast soccer video. In this method, video frames are firstly classified and grouped into sections, and the sections are divided into clips. Then we can use the low-level descriptors to classify the clips. Low-level descriptions include color, motion descriptor and edge descriptor. Experiments on real soccer video programs show the encouraging results.

Abstract: Orthogonal Frequency Division Multiplexing (OFDM) is a multi-carrier communication system and the system is very sensitive to synchronization errors. The problem that synchronization is not accurate can reduce the system performance largely. Based on the research of Schmidl & Cox and Minn algorithms, the paper proposed an improved timing synchronization algorithm by using the new training sequence in the frequency domain. The improved algorithm eliminates the peak platform problem and side lobe peak problem of the conventional synchronization algorithms in this article. The simulation at MATLAB shows that the improved algorithm overcomes the problems of the conventional algorithms and the timing judgment curve of the improved algorithm also has a very sharp peak at the timing synchronization position, compared with the conventional algorithm. So, the timing synchronization performance of the algorithm is better.

Abstract: With the development and formation of networked and digital campus, the characteristic of diversification and complicated have been founded in student’s learning behavior. At the same time, for more broad application of web technology, promoted the ascension of teaching effect and reformation on education teaching method. In this paper a new evaluation analysis model about student's study quality based on web was proposed, and in this model, and in this model the correlation analysis algorithm has been used to verified the danamic relationship between analysis model and student performance, with the description of core technology in this model the validity and practicability of teaching quality monitoring process in the level student was proved.

Abstract: As a typical problem of graph theory, Single-Source Shortest Path(SSSP) has a wide range of applications and research. The traditional MapReduce framework such as Hadoop has been applied to SSSP problem. However, in this way, it may need writing and reading the disk frequently, transmitting data largely, beacuse of SSSP’s iterative. Haloop is a parallel programming framework which makes an improvement based on Hadoop framework, and adapts itself to iterative programming. Hence, this article represents the SSSP problem with an iterative way firstly, and then we put forward the implementation mechanism of SSSP algorithm based on Haloop. Though testing and analyzing, the implementation based on Haloop obviously improves the efficiency of program execution, compared with the traditional realization mechanism.

Abstract: By using the ANSYS/LS-DYNA software, to get trajectory map, overload curve of projectile penetrating and depth curves after doing numerical simulation of projectile oblique penetration course targets at head shape of 30 ° and 60 ° cone angle, and also in parabolic separately. The simulation results summarize the law of motion and motion characteristics of projectile head shape, when it obliquely penetrates into the soil, which puts forwards some references for projectile designs.