Advanced Materials Research Vols. 383-390

Abstract: Virtual Private Network (VPN) is a logic network established on top of a public packet switched network. Previous research works on VPN mainly focused on security issues, such as tunneling, encryption/decryption and authentication. To guarantee that customers’ QoS requirements specified by customers can be met, the network service provider needs to reserve enough network resources on the network, and allocate/manage them in an optimal way. Traffic engineering algorithms can be used by the network service provider to establish multiple VPNs in an optimal way, while meeting customers’ QoS requirements. Previous works on VPN traffic engineering focus on meeting bandwidth guarantees, however, for some network applications, such as VOIP and IPTV, meeting delay requirement is one of another vital issue. To our knowledge until now, issues about traffic engineering for establishing VPNs meeting both bandwidth and delay requirements have not been investigated. In this paper, we proposed a novel VPN traffic engineering algorithm for establishing hose model VPNs with delay requirements. According to experimental simulations conducted our algorithm achieved better performance compared to previous ones.

Abstract: Soakage agent in glass fiber production is critically, the stability of its quality is directly related to the stability of the glass fiber quality. According to the characteristics of the soakage glass in fiber agent production process, this paper is mainly introduced the multi-sensor information collection for the soakage agent process parameters, and is proposed to use PLC programming, PID control and fuzzy control harmony methods to achieve the real-time automatic control preparation process of the soakage agent in adding water of amount, adding oil of amount, temperature control, liquid level control, viscosity test and many other parameters . The practical application of the automatic control system is reliable, accurate, real time.

Abstract: Based on the grain orbit model, this paper built the raceway turbulent mathematical model on the consider of various factors, such as coke pyrogenation, water evaporation, coke burning, air turbulent and other chemical reactions in BF raceway, and used the secondary development of CFX software to complete the numerical simulation of the mathematical model and to analyze the state in a visualization way. The distribution rule of the gas flow is that the flow is poor in the center of BF and the flow is high in the BF fringe. The results of the numerical resolution were confirmed by the BF experiments. This study provided data support for optimizing the BF operating system.

Abstract: The optimal nonholonomic motion planning for spacecraft multibody system is researched. The attitude motion equations of spacecraft multibody system take on nonholonomic constraint without outside force. The control of system can be converted to the nonholonomic motion planning problem for a driftless system. Based on modified-Newton method, the optimal control algorithm of controlling spacecraft to desired attitude is accepted by optimal control algorithm and Ritz approximation theory. Quaternion is used to describe the kinematics equation, which avoids the singularity and has the benefit of small calculation and high precision. At last, numerical simulations of spacecraft with two reaction fly wheels has proved of the approach to be effective.

Abstract: For the status quo that monitoring system for mechanical equipment has limited ability to integrate information and make decision, designed the model of wireless monitoring system for mechanical equipment based on multi-Agent technology, discussed means to exchange information and communication principle among each Agent, proposed method to adjust performance parameters and task data for inference results of decision-making-Agent based on BP neural network control algorithm, realized automatic and intelligent monitoring for mechanical equipment performance.

Abstract: The CAN-Bus technology in the automotive body control module applications is discussed, A experimental platform is designed for CAN-Bus network test in laboratory environment, which is based on the CAN-Bus network structure in a certain type of automotive

Abstract: This approach to system analysis, understanding and analysis of optimization of the object, clear logistics optimization objectives, the establishment of the model reflect the actual logistics process to determine the operating model of a variety of data, evaluation of logistics optimization program performance, continuous improvement of logistics optimization program; study supply logistics center in strategy and optimization, explicit location decision-making in logistics management and its influencing factors, to determine the regional distribution centers and the number of distribution centers. The basis of these studies, as Yanzhou mining group for material distribution lines and distribution centers optimize settings to improve the coal group on the efficiency and effectiveness of material delivery.

Abstract: The reliability of the nuclear power plant DCS is analyzed using Markov process to establish a mathematical model. And the initial use of the model on the three indicators of reliability parameters of nuclear power plants is calculated. The results showed that the model is correct,reliable and error rate is 9×10^-10.DCS applies to preliminary analysis of the reliability of nuclear power DCS. Nuclear power plant DCS reliability is high enough, the minimum time of continuous operation is up to 66667 h, compared to conventional control methods more safe and reliable.

Abstract: Piping engineering, which involves a plenty of materials and has a large-scale construction work quantity, is an important part of chemical engineering, and how to make a good cost control of it is very important for the success of chemical project. Based on the Cybernetics and Systems science, this paper has established a whole process covered cost control model and proposed the control system for the piping engineering, and the related control strategies have been also proposed on this basis. Finally, combined with some cases, this paper analyzed the application of the whole process covered cost control methods in the chemical piping engineering.

Abstract: It is a new design and manufacturing method which forming medical image data processing technology and multi-point forming technology for titanium alloy cranial prosthesis digital design and manufacturing. First, the head of the CT data of patients according to medical image segmentation approach to the skull and scalp, brain image segmentation boundaries, using registration method to segment the skull CT image registration, and application of 3D visualization technology in patients with skull reconstruction of the mathematical model. Then on this basis, the use of thin-plate spline interpolation in accordance with the health side of the skull surface extension of the transition to be a mathematical model of the skull prosthesis. Finally, the mathematical model of the skull prosthesis passed to the multi-point forming CAD / CAM software system, so that multi-point forming the basic body to adjust the upper and lower press out the skull prosthesis forming surface, and processing the required titanium alloy cranial prosthesis. The technical solution of the skull repair system prepared in the presence of low precision machining, production costs are high, long cycle and so on, while improving the prosthesis fit and the precision of the edge defects.