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This paper explore the odevity coordinate to conduct virtual space vector modulation for the neutral point clamped inverter. It deduced the mathematical expressions of the duty ratio of six sectors and presented a unified space vector sequence. This modulation simplifies the calculation and eliminates the difference between sectors of virtual space vector algorithm as well as removes the low frequency...
Risk assessment is the core as well as the most difficult and time-consuming part in real estate project investment and decision-making. In this paper, on the basis of project investment risk assessment methods widely used at home and abroad currently, combined with modern fuzzy mathematical theory and methodology, a network model appropriate for the investment risk assessment of the overall process...
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