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A model predictive control (MPC) strategy for a three-phase three-level neutral point clamped (NPC) grid-connected inverter is discussed. Conventional two-level inverters are effective when a symmetric fault occurs. But when a three-phase unbalanced fault occurs, they will generate errors and introduce delay in the power system because of the complex design or the neglected negative-sequence component...
The vast interconnectivity of devices in the Internet of Things (IoT) and Cyber-Physical systems under wireless environments facilitates information exchange, but challenges network security. In this paper, cooperative beamforming for secure communications is studied in wireless cyber-physical systems, where two legitimate devices communicate with the help of amplify-and-forward (AF) relays, and the...
In order to solve the complex problem of evaluation of logistics capability in E-commerce environment, an index system model of logistics capability is established based on the method of Fuzzy-AHP in this paper. The results show that the method of Fuzzy-AHP is a powerful and flexible multi-criteria decision-making tool for dealing with complex problems where both qualitative and quantitative aspects...
The number of vehicles hitting the road each day is rapidly increasing, and several problems, such as traffic congestion or driver safety, can no longer be solved in the same fashion as before. Intelligent transportation systems could potentially solve part of these problems, but prototyping, designing and testing cooperative smart vehicles is a cumbersome task. This paper presents a realistic simulator,...
Periodic defected ground structures (PDGS) are the structures that are etched periodically on their ground plane, which can be used to prohibit the propagation of electromagnetic waves within a certain band of microwave frequency. PDGS with defected triangles can be used to prohibit the propagation of electromagnetic waves within a certain band of microwave frequencies. The precise transmission parameters...
Research and development activities (R&D) as the core competitiveness in the high-tech enterprises play an extremely important role and far-reaching significance. If the high-tech enterprises want to realize the effective management to the R&D activities, and improve their success rate and economic benefits, it is necessary to conduct a scientific evaluation for the R&D performance. To...
Collision avoidance systems (CAS) are an emerging automotive safety technology that assists drivers in avoiding collisions. They monitor the dynamic traffic and vehicle information in real time and assess the current threat level to decide if warnings should be issued to the driver or automatic braking is needed to avoid collisions. Several measures have previously been defined for threat assessment...
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