Advanced Materials Research Vol. 705

Abstract: To meet requirements of time data dynamic growth , and reflect the different effect to the different segment of time series over time, a new method of piecewise linear representation, called tangent piecewise aggregate approximation (TPAA) is proposed based on hyperbolic tangent function. The method can not only meet requirements of time data dynamic growth, but also reflect time property of the time series. Compared with the existing methods, TPAA method can effectively query time series online.

Abstract: The paper analyses the basic exposure signal and types of X-ray machine, then propose a reusable pulse exposure timing control mechanism for X-ray machine, using of SCM program. It completes synchronization of X-ray machine pulse exposure and image capture.

Abstract: This paper introduces an intrusion detection system which uses IPV6 principle to work out a new intrusion mode so that the intrusion behaviors could be identified. This system adopts the intrusion features to analyze the consistency and deviations which is different from the common methodology which utilizes the historic data for this purposes. A Snort system is proposed to test the Network Intrusion Detection System (NIDS) that is based on IPV6.

Abstract: A real-time interactive smart energy system is designed based on the internet of things and cloud computing, which is composed of Smart Meters, Smart Terminals, Smart Power Plugs and Cloud computing service system. Combining with Smart Gird property and the internet of things technology, the smart energy system provides the full range interaction of Power companies-Internet of things equipments-cooperation between the equipments. Meanwhile, the offline decision mode is supported by the expert system and the online decision mode is provided by the Cloud computing service system, making it both reliable and real-time in transaction processing. Eventually, the smart energy system can achieve real-time visualization, diversified interaction, smart interaction and scientific decision-making.

Abstract: The function projective synchronization of nonautonomous chaotic system with a new type of scaling function is investigated. The scaling function factor discussed in this paper is a new kind of function which contains the state variable. Obviously, this kind of scaling function is complicated than former ones. Based on modified active control, the general method of this synchronization is proposed. In numerical simulation, the heavy symmetric gyroscope system is taken as the instance to demonstrate the validity of the controller and the feasibility of the proposed synchronization.

Abstract: In geophysical prospecting area, the issue how to obtain high precision and low scale geomagnetic charts has been a research focus all the times. In this article, the application based on normal Kriging method can be interpolation proved. Through interpolation and evaluation for the original geomagnetic grid based on Kriging algorithm, the new geomagnetic grid can be estimated by the way of data's transitivity. After that, the geomagnetic chart with high precision and low scale can finally be drawn. At the same time, its feasibility upon this sort of method has been verified.

Abstract: Large cable-network antennas are typical flexible space structures, which will inevitably generate deformations under various disturbances from out space. To avoid the degradation of shape accuracy due to deformations, it is imperative to find effective approaches to implement shape control for such antennas. In this paper, a novel application of smart piezoelectric rods that are mounted in the ring truss supporting structure of the antenna is presented to solve the shape control problem. The control mechanism is to generate displacements in opposite direction to resist primal deformations by using the direct piezoelectric effect of piezoceramic materials. Based on the genetic algorithm, optimal locations of the smart piezoelectric rods used for shape control is analyzed in the study. Numerical results demonstrate that the present shape control approach with appropriate placement of smart piezoelectric rods is feasible and effective.

Abstract: The previous studies show that the transverse distribution of pressure and temperature in microscale Poiseuille flow cannot be predicted by Navier-Stokes equation with the slip boundary condition. In this paper, we analyzed the planar microchannel force-driven Poiseuille flow by high order continuum model. The super-Burnett constitutive relations were used and the nonlinear ordinary differential Equations of higher-orders were obtained by the hypothesis of parallel flow. With a perturbations theory, we linearized the equations and obtained the analytic solutions. The results show that the solutions can capture the temperature dip which is the same as the DSMC result. However, we also find that the temperature profile near the wall does always not match with the DSMC result. Especially, the difference in the qualitative exists when the Knudsen number is large enough. The non-equilibrium effect near the wall such as Knudsen layer can not be described entirely by continuous model even with high order constitutive relations and this confines the extension of the continuous model such as super-Burnett one.

Abstract: In order to apply the PTO pulse function of Siemens PLC in a more systematic, convenient and effective way, this thesis adopts the position control wizard to generate envelop and control subroutine. The thesis also makes detailed descriptions and case discussions on the four subroutines of PTO0_CTRL, PTO0_RUN, PTO0_MAN, PTO0_LDPOS, and the results show that using the position control wizard can not only generate envelop and control subroutine conveniently but also bring convenience to the application of the subroutine. Especially, the parameters of the four subroutines interact both independently and mutually. If we make a deeper research on the parameters, we can master their relations further more and apply them more proficiently.

Abstract: With the rapidly developing of Internet, the problem of network security is getting more and more serious gradually. Most of the root cause is in connection with illegal host access. The source address validation improvement (SAVI) is a technology to realize the source address validation in the access network. Illegal access of the user can be safe and effective control from the access layer by SAVI. SAVI has positive significance in the use of the ipv6 campus network.