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With the development of internet, the network connection between Industrial Control System (ICS) and public internet has been becoming more and more closely. What's more, the traditional IT system attacks have been spread to ICS and become more frequently. However, the traditional security analysis of IT system is not enough to be applied to ICS. In this paper, we present a tool called Attack Path...
TOFD (Time of Flight Diffraction), one of the most advanced technologies in the field of NDT (Nondestructive Testing), is widely used in science and industry to evaluate the properties of material, component or system without causing damage. Experiments on TOFD show that signal is greatly disturbed by the noise received by the receiving probe. Based on the performance analysis of four different kinds...
Probabilistic Safety Assessment (PSA) has been widely used in nuclear safety and reliability field in recent years. PSA is playing a positive role in these fields and the analysis programs are also in rapid development, but the model created by one program cannot be used in another, so the results are difficult to be cross verified. A universal method is develped based on Open-PSA platform to solve...
The introduction of communication systems to power system controllers have brought in another layer of complexity in their design and operation. In this paper a Plug-in Hybrid Electric Vehicle (PHEV) charging facility is studied. A linearized model of the facility is built including both the dc/dc and dc/ac converters of the Distributed Energy Resources (DER). In addition, a control strategy that...
We describe an active contour based local energy minimization point distribution, behavior of orientation, relaxation iterative algorithm that estimates feature points of static target in image sequence. In our approach, we build a contour model of a target to get some of low-energy points kernels. The use of snake based line model results in more reliable convergence of the point local energy minimization...
Energy consumption is not well balanced for all sensor nodes in most of the energy efficient routing protocols for wireless sensor networks (WSNs). In this paper, we optimize each individual distance so that all sensor nodes consume their energy at similar rate. After the theoretically analysis of hotspot based on certain energy and traffic models, we propose our Distance-based Energy Aware Routing...
The first non-parallel operating AC/DC system with series capacitor being constructed in China is hybrid of the Hulunbeier-Liaoning ±500 kV HVDC lines and Yimin-Fengtun 500 kV AC transmission system. Its subsynchronous oscillation problem become complex because of the mutual effect of series capacitor compensation and HVDC. In order to analyze the SSO characteristic of this new grid structure, six...
This article focuses on the stabilization, using PID controllers, of second-order systems with a pair of complex poles plus time-delay. The parameters constraint of the controlled plant for the existence of a stabilizing PID controller is first provided. And the stabilizing range of proportional-gain is derived in terms of a version of Hermite-Biehler Theorem applicable to quasi- polynomial. Then,...
This paper presents a novel failure analysis and prioritization method, which takes the advantages of both fuzzy and Bayesian reasoning to deal with some of the drawbacks concerning the use of the conventional failure mode and effects analysis (FMEA) technique. The method is proposed to extend the previously developed fuzzy rule-based bayesian reasoning (FuRBaR) approach to a wider context, where...
This article addresses the stability analysis for TCP networks with proportional-integral (PI) AQM scheme based on a graphical necessary and sufficient stability criterion. A linearized second-order fluid-flow TCP model is adopted and the stability region is drawn in the proportional-integral gain space of PI AQM strategy. Then, we relate the network parameters with the PI controller parameters, and...
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