Applied Mechanics and Materials Vols. 63-64

Abstract: To improve efficiency of information engineering surveillance, expert system was introduced. First, describes the theory of expert system and the necessity of expert system for information engineering surveillance; Second, designed the system architecture, analysis how to store the cases of the system and describes a case retrieval algorithm, introduce information entropy, compute information gain; Finally, make an better Nearest neighbor algorithm method, the improved algorithm has overcome the traditional K-NN method’s inadequate.

Abstract: This paper evaluates reliability of binary directed tree-structured systems based on terminal failure limit-value. For the difficult problem with complex structures and directed transitive relation, the paper describes nodes in the tree system using set algebra, and uses set operations to compute a combinational mode of failed nodes, and then describes it with family of sets. On that basis, an effective algorithm is shown, and a numerical example is given to illustrate the algorithm obtained in the paper.

Abstract: In this paper， we introduce a food production and packaging system. This system includes many processes, namely, mixing, blending, molding, drying, packaging, and relates to multiple devices. To ensure the quality of food production and packaging, it needs coordination of all procedures and controls based on process requirements to achieve different objectives, so we use PLC centralized control in the food production and packaging system. According to the control object, we allocated the PLC address and choose the PLC of Siemens S7-200. On the basis of control tasks, we designed a control flowchart and programmed for PLC control system of Siemens S7-200 using STEP7-MICRO/WIN programming software .The practical applications have proved the good results.

Abstract: We build up a multi-objective location model of emergency logistics center location, The model combined the construction cost of emergency logistics center with the point of shortest distance from the emergency needs of the logistics center to the limited demand, so that meet the different deployment strategies. We get satisfactory results in the practical by using parametric programming method for solving multi-objective model and verifying for the analysis of examples of this multi-objective decision. The model take into account the cost, efficiency and fairness, combined with the traditional model of coverage (covering model, gravity model and the P-median model).To meet the city's emergency different deployment strategy, the multi-objective location model solve and verify by the parametric programming method and some examples.

Abstract: When the cell pack is tested, it need low ripple charging current to ensure the tester accuracy. It is very necessary to set proper DC filter which has excellent filtering characteristic and wide input/output range. The inner resistance of a cell pack is very small but the system is indefinite. If the DC filter is designed by the type of traditional matched filter, the flat-fading would inevitably occur. This would reduce the power transmission efficiency. This paper discussed the design philosophy of the non-matched filter and proposed a non-matched Chebyshev DC filter design method aimed at the special resistive-capacitive property of the cell pack. The method is proved to be correct and feasible by simulation.

Abstract: Petroleum industry is a pivotal component of a country’s industry, which can provide fuel oil and gasoline to guarantee the running of the whole economy system. By using the history data of petroleum industry in different geographic nations, we can get the difference between countries. To measure the petroleum development level, we collected the corresponding data of petroleum production, consumption, oil export net, oil import net and refining capability of different nations. To calculate the using efficiency of different nations, the comprehensive evaluation named DEA is applied in this paper to in the view of multiple inputs and outputs system. By using the results of comprehensive evaluation and international comparison, the gap analysis between China and other nations are obtained as conclusions.

Abstract: With the development of human resource management, the function of human resource becomes more prominent in performance management in enterprises. By using strategic and coherent approach, we can measure the performance of employees which individually and collectively contribute to the achievement of the objectives of the business. Because human resource management (HRM) is a multiple dimensional system, the HRM performance evaluation should be taken peer variables into account. So, we proposed a peer appraisal method, denoted as TOPSIS, to evaluate the performance of human resource in enterprises. Before we applied TOPSIS methodology, the indexes for measuring the HR performance should be identified firstly. Based on the basic traits of HRM, the indexes are identified by grey correlation analysis. A peer performance evaluation frame based on grey theory and TOPSIS methodology is proposed in this paper. Using the HRM performance evaluation frame, we applied in 45 scientific material enterprises in Jilin province and drew corresponding constructive conclusions.

Abstract: Beating degree can not be measured on-line, study shows that beating degree is associated with pulp consistency, pulp flow rate, pressure of inlet pulp, the energy consumption of refining, the refining time etc. A beating degree’s soft-sensing model based on fbp algorithm was established .It was applied in beating degree’s control successfully. The actual result shows that this method can realize beating degree’s accurate measurement and lays the foundation for beating degree’s optimal control.

Abstract: In intelligence materials system, sensor nodes may typically scattered around the targeted surveillance area. Therefore, all nodes within such network are responsible for collect and route data from sensors to receivers. Along with the development of intelligent materials databases, communication speed and efficiency may strongly affect the performance of distributed multi-database system. This paper firstly introduces a p2p distributed multi-database system architecture and its characteristics, moreover explains the node communication mechanism. Secondly, it proposes a protocol with its 4-layer structure and respectively explains the layer design ideas and functionalities. Finally, by analyzing the transmission efficiency and speed, the paper proposes the practicability and validity of protocol.

Abstract: This paper proposes an optimal control method to achieve the path tracking mission for the vision based intelligent vehicle. After the access of road trajectory, path tracking task is achieved by the intelligent vehicle automatic steering devices. The angle deviation and lateral deviation relative to the target path can be controlled in the smaller range by state feedback optimal control. A car model contained road information is established for the achievement of intelligent vehicle path tracking and automatic steering. Some values of the variables needed for the control system are obtained by sensors mounted on the car, and achieve the path tracking by the optimal state feedback controller. The algorithm proposed has been validated by simulations. It can make the lateral deviation within the expected range stability. And also the lateral acceleration meets the ride comfort requirements.