Advanced Materials Research Vols. 271-273

Abstract: Digital management of PetroChina Changqing Oilfield Company (PCOC) was a modern management mode for "three-low" oil and gas reservoir economic development. Based on the establishment of digital management "three terminals and five systems", supported by digital technology, we set up one unified platform for production operation management, production operation scheduling, and emergency response and rescue, which provided an efficient collaborative work environment for management decision-making and scientific research. Combined digital technology with management, we promoted a shift in terms of labor organization structure, production organization and production operation mode.

Abstract: In order for undergraduates to master basic skills of computer technology, the grades in C language be evaluated as the important indicator of the level of a college computer basic education. This paper exploits the data from a cohort of the Jianghan University undergraduates to explore the extent to which the impacts of the evaluation index are specific to grades in C language. Using regression techniques, the paper tries to provide some references for colleges to improve the basic education of computer.

Abstract: On the basic of studying the present technical situation of home and abroad about computer aided History Matching of the reservoir numerical simulation and digesting, absorbing technology, we studied and optimized highly effective algorithm fit for the aided History Matching. At the same time, we designed the software interface and frame and function module, developed the independent aided History Matching software named CAPHE, thus formed aided history methods suitable for our independent reservoir simulator-PBRS. By using of the software in practical some oil simulation blocks, CAPHE can significantly increase History Matching efficiency in the reservoir simulation.

Abstract: The article systematically analyzes the method of knowledge representation, introduce the basic concepts of the ontology, the ontology-based knowledge representation method of E-government. The focus is examining the E-government Ontology Modeling Language, OWL language, and then propose the principle of build E-government Ontology. It is including the ontology construction method, build tools and build.

Abstract: To analysis the characteristics of undergraduate curriculum for networks engineering major, this paper explores the technical features and capacity needs, and divided the professional direction of networks engineering into three basic directions according to the life cycle. The research results show that the construction of professional knowledge should be as the guiding ideology of undergraduate curriculum design. At the end, a specific curriculum has proposed to improve the ability for the student of the network engineering, which is organized by the knowledge relationship among the core courses.

Abstract: To improve the overall performance of image fusion, this paper proposes a Bacterial Foraging Algorithm (BFA) based method. First, this method selects several objective standards to construct an index representing the overall performance of fused images. Second, after the source images were decomposed by Contourlet transform, we obtain the coefficients of low-frequency and high-frequency in Contourlet domain. Then, the swarm intelligence of BFA is introduced to determine the proportions of high-frequency coefficients, i.e. the optimal weights. Finally, we use the high-frequency coefficients fused by the optimal weights and the average of low-frequency coefficients to reconstruct the optimal fused image. Experimental results show that the method not only can provide with good visual effects, but also is superior to eight widely-used methods.

Abstract: Due to the large amount of calculation and high time-consuming in traditional grayscale matching, this paper combines artificial fish algorithm of swarm intelligence with edge detection and the operation of bitwise exclusive or, and presents a fast method on feature matching. The method regards the problem of image matching as a process of searching the optimal solution. In order to provide artificial fish swarm algorithm with an appropriate fitness function, the operation of bitwise exclusive or and addition is employed to deal with the edge information extracted from the template image and the searching image. Then the best matching position is gradually approaching by swarming, following and other behaviors of artificial fish. Experimental results show that the proposed method not only significantly shortens the matching time and guarantees the matching accuracy, but also is robust to noise disturbance.

Abstract: It uses virtual reality and visualization technology to develop the coal mine production 3d visualization platform, providing strong management and technical support means for coal mine production is one of the main research aspects of Digital coal mine. This paper starts from the status of coal virtual environment research, the function this System should have and the relevant technology of the SOA, providing three layers of architecture of service oriented 3d visual information platform of coalmine virtual environment system。It details the engineering construction ideas of 3d visual information platform of coalmine virtual environment，and also details All levels function model and the related services protocol architecture.

Abstract: Aimed at the prime state problem about dynamic object position in the field, the statistical method is used to analyze distributing rule on dynamic object area position. Through studying the distributing theory on the dynamic object position, measuring the coordinate date of dynamic object and using statistical method such as hypotheses on normal distribution, hypotheses on exponential distribution, hypotheses on Raleigh distribution and hypotheses on the parameter, the distributing rule on dynamic object position is found. Based on the result of discussing each one test significance level, the distributing of dynamic object position can be is seen as hypotheses on exponential distribution in the level of significance.

Abstract: PWM (Pulse width modulation) has been widely used in power converter control. This paper is the development of a high-frequency PWM generator architecture for power converter control using FPGA and CPLD ICs. The proposed architecture is based on a special design synchronous binary counter and can be easily interfaced to a microcontroller or DSP system. The resulting PWM frequency depends on the target FPGA or CPLD device speed grade and the duty cycle resolution requirements.