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In this paper, we proposed a new routing protocol for Unmanned Aerial Vehicles (UAVs) that equipped with directional antenna. We named this protocol Directional Optimized Link State Routing Protocol (DOLSR). This protocol is based on the well known protocol that is called Optimized Link State Routing Protocol (OLSR). We focused in our protocol on the(More)
This RFID technology has brought a revolution in data collection, thus putting forward real time constraints in middleware architectural design. This paper introduces complex event processing, an emerging technology for building and managing information systems, to discover, understand and report the meaningful events within processing streams. It discusses(More)
Due to the switching operation, the pulse-width modulation (PWM) converters are inherent time-variant systems with comprehensive dynamics. The generalized state-space averaging (GSSA) method is an approach to model them as time-invariant systems, defined by a set of differential equations and capable of representing circuit waveforms. This paper proposes a(More)
A networked control method for multi-inverter parallel system is proposed in this paper. Current-sharing control strategy and communication design are described. TOD (Try-Once-Discarded) scheduling mode is used to realize the real-time and accurate transmission, and the Joint scheduling algorithm of TOD is implemented to predict the networked control system(More)
The emerging smart grid system requires high speed communication Technology. Among all the proposed Technology, the powerline communication solution seems to be most appropriate. This paper presents the noise characteristic and transmits characteristic of the power line channel at first, then establish the basic power line channel model according to(More)
Aiming at the problem of constructing huge amounts of projected databases in PrefixSpan algorithm, this paper proposes an Improved PrefixSpan algorithm for Mining Sequential Patterns, called BLSPM algorithm (based on bi-level Sequential Patterns Mining). The algorithm use duplicated projection and certain specific sequential patterns pruning, reduce the(More)
In this paper, two power-sharing strategies of the fast networked control system for inverter parallel operation is proposed, which differs in transmission signals of power. Because of the rapidity of control period, the transmission time-delay can not be ignored. After the description of implementation method and mathematical modeling of systems, two(More)
In this paper, on the basis of the analysis of power line channel characteristic,we firstly build a power line channel mode. And then, we elaborate the spectrum theory and its main performance indexes. At last, the direct sequence spread spectrum communication system is build by MATLAB/Simulink using the power line channel mode. The simulation results prove(More)
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(More)