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For a grid-connected voltage source converter (VSC), a LCL-filter is often applied to attenuate the switching harmonics. However, when the LCL-filter based VSC connected to a weak grid, the stability of the system may be impacted due to harmonic resonance and deteriorated voltage waveform at the point of common coupling. Hence controller design for the VSC becomes more challenging. This paper studies...
Pricing process is significant for the development of SaaS industry, which has not largely researched yet. Aiming at exploring a ripe pricing strategy system for SaaS, we mainly consider cost, the choice of pricing model, and customization as the key elements influencing the price, especially customization (on-demand service). To help decision makers set a sensible pricing strategy, we build our Optimal...
With the constant improvement of software complexity, the safety has become an important factor in software development and use. Especially in aviation, safety accidents usually lead to serious personal injuries and economic losses. As a mathematical modeling and analyzing tool, Petri Net can serve as effective means in analyzing system safety during the software development stage. The traditional...
This paper presents a novel control scheme for the multi-body semi-active suspension system. The proposed scheme is composed of two parts: a multi-body model of the semi-active suspension system and a genetic algorithm-based fuzzy logic controller. With the fast development of computers, multi-body model and multi-body systems dynamics are applied to a broad variety of engineering problems. In this...
Vertical-axis turbine (hereafter VAT) is the common and key equipment in tidal-current turbine generator systems in recent years, with the characteristics of the main axis perpendicular to the flow direction, the blade parallel to the main axis. The kinetic energy of water stream is absorbed by VAT, translated into mechanical energy and then into electric energy. The hydrodynamic performance of VAT...
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