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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...
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...
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...
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...
This work considers message coding on a transport layer of data network using error correcting codes. Initially transport coding was presented with constant coding rate [1]. This work suggests usage of variable coding rate by recoding messages on some intermediate nodes of data network. The work contains analysis of recoding efficiency based on analytical model and simulation of Kleinrock network...
Analytical models of stress and deformxation of through-silicon vias (TSV), relative to numerical ones, have the advantage of being inexpensive to evaluate and in providing insight. They have the additional advantage of allowing one to embed them in ECAD tools for real time design decisions. Motivated by this reasoning, in this paper, an analytical model for the three-dimensional state of stress in...
This paper is concerned with the evaluation model of emergency capability evaluation for the ship at sea. The goal of our work is to find the human reasons leading to the poor ship emergency capability, and then improve the team cooperation ability in emergency to avoid the vessel accidents. In this paper, firstly, according to the special attitude of the ship on sailing, the emergency capability...
Integration of informatization and industrialization has been taken as an effective way of Chinese industrial transformation and upgrading, it is also the evitable choice to adjust the economic structure and the mode of economic development. Owing to the complexity of the integration of the two, we put forward the definition of the integration system. By analyzing the complexity and self-organization...
Crane is one of the indispensable tools in the engineering application, and it is one of the multi-axial drag lifting work systems. In this paper, the idea of distributed physical net modeling is adopted to the modeling and simulation of simplified multi-axial drag lifting work system which is based on DC motor, a way of applying in the practical application is put forward. After building a model...
Cloud computing and service computing can be integrated into a distributed computing platform which provides a set of services to their users. Different services could cooperate with each other to accomplish more intricate tasks. However, third-party cloud services may cause failures or quality violation of workflow applications. Especially in some critical business scenarios, service performance...
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