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Computing a prioritized set of vulnerabilities to patch is important for system administrators to determine the order of vulnerabilities to be patched that are more critical to the network security. One way to assess and analyze security to find vulnerabilities to be patched is to use attack representation models (ARMs). However, security solutions using ARMs are optimized for only the current state...
There are circulating currents among the parallel inverters. Based on the existing researches on circulating currents, an accurate model of switching frequency circulating current is proposed in this paper. Moreover, the relationships between the circuit parameters and switching frequency circulating current are investigated and analyzed in detail. Based on the analytical results, favorable design...
The paper presents a novel Modal and Domain Decomposition approach for fast and accurate analysis of high-speed Printed Circuit Boards (PCBs) and electronic packages. This combined method overcomes both the accuracy limitations of the classic Modal Decomposition Method and the significant performance limitations encountered with any 3D full-wave method. The proposed combined method utilizes an Integral...
With the development of the Internet, online shopping has become a symbol of the times. The delivery, as the most critical part is also developed rapidly. The study of the relationship between online shops, express delivery and customer satisfaction has become a hot topic. This article analyzed the impact of online shops and express service quality from the perspective of customer satisfaction, taking...
Gift cards are widely used by many enterprises nowadays for products promotion. Gift cards are used not only for a basket of goods, but also for some specific kinds of goods. In this paper, we characterize consumers' purchasing behavior according to descending consumers' reservation price, then develop a model to derive the optimal purchase amount threshold and gift card value. We find that offering...
Decrease in state of health (SoH) of a battery is a measure of end of battery life. Also available battery capacity is dependent on battery life either. Thus accurate estimation of SoH and cycle number of a battery are very important. In this study a method was proposed in order to estimate battery cycle number using ECE 15 driving cycle. Also another method to obtain SoH of a battery using the cycle...
This paper presents a parameterized, dynamic model of Moog D671 hydraulic servovalve. The valve is a 4/3, center closed configuration. The model is developed based on first principles and is compared to a dynamic model in the form of a Simulink S-function made available by Moog Inc. The model is developed as part of a system level modeling, simulation, and analysis activity at Clemson University's...
Structural methods in model-based fault diagnosis applications are simple and efficient tools for finding candidates for residual generation. However, the structural methods do not take model uncertainties and information about fault behavior into consideration. This may result in selecting residual generators with bad performance to be included in the diagnosis system. By using the Kullback-Leibler...
Garbage collection plays a central role of flash-based solid state drive performance, in particular, its endurance. Analytical modeling is an indispensable instrument for design improvement as it demonstrates the relationship between SSD endurance, manifested as write amplification, and the algorithmic design variables, as well as workload characteristics. In this paper, we improve recent advances...
This paper proposes a theoretical study supporting the use of simplified single-diode photovoltaic (PV) models to accurately reproduce the behaviour of PV generators. In particular, a newly defined parameter is introduced, which allows to classify PV modules according to the possibility to neglect either the series- or the shunt resistance in the circuit model. On such a basis, equations allowing...
In hydrogeology, estimating aquifer permeability is an important issue. This can be useful in understanding the flow of pollutants from one area of an aquifer to another. For this aquifer analysis sake, the Hydrogeological Experimental Site of Poitiers (France) covering a limestone aquifer is an appropriate instrumented test bed enabling measurement of hydraulic responses of a series of observation...
Cloud computing is becoming popular as the next infrastructure of computing platform. However, with data and business applications outsourced to a third party, how to protect cloud data centers from numerous attacks has become a critical concern. In this paper, we propose a clusterized framework of cloud firewall, which characters performance and cost evaluation. To provide quantitative performance...
Instructional activities should allow applying the knowledge acquired in the day by day and in real situations. Different studies evidence the potential impact of video games on learning, however very few empirical studies that focus on continuous assessment. On the other hand, because the variables that influence the achievement of learning objectives are different levels becomes complex to validation...
From the perspective of securities analyst, an important information intermediary in stock market, this paper uses a questionnaire survey and the structure equation model and discussed public investor satisfaction to securities analysts' information service. The result of empirical research shows that: first, factor having the greatest positive effect on investor satisfaction is the analysts' service...
The 4G standard Long Term Evolution (LTE) utilizes discontinuous reception (DRX) to extend the user equipments battery lifetime. DRX permits an idle UE to power off the radio receiver for two predefined sleep period and then wake up to receive the next paging message. Two major basic power saving models proposed to data are the 3GPP ETSI model and industrial DRX model proposed by Nokia. While previous...
Water injection exploration is a primary technology to ensure crude oil production. Especially during the mid to late term of oil field development, no water injection means no crude production. Therefore, oilfield companies set up large injection pump station and pipe network system to guarantee normal operation and increasing production. Simulation evaluation, optimized running management and automatic...
The accuracy of traditional model-based fault detection of coal mine water level sensor is easily influenced by modeling errors and disturbances of complex mine environment, which cause underreporting or false alarms. In order to solve the problem, this paper presents a fault detection method of principal component cluster analysis for the coal mine water level sensor. The method gets the sample set...
Time dependent hereditary properties of complex materials are well described by power-laws with real order exponent. This experimental observation and analogous electrical experiments, yield a description of these properties by using fractional-order operators. In this paper, elasto-viscous and visco-elastic behaviors of fractional order hereditary materials are firstly described by using fractional...
When the wave piercing catamaran is sailing in the ocean at a high speed, longitudinal motion might bring some adverse effects on its performance. The vertical acceleration generated makes the passengers and crew sick and the catamaran will be in a short-time failure. On general conditions, a ride control system is adopted to solve these problems. Firstly, a pitching and heaving motion model for the...
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