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System performance on cognitive femtocell network depends on power control method. Therefore, power control comparison between DPC and PCG is needed. Result showed that DPC had higher convergence rate than PCG but maximum values of DPC was only equal to SINR target. The proposed PCG at the convergent condition was able to exceed the SINR target, yet it had higher power than the previous PCG which...
The small wind turbines (SWTs) provide a lot of alternative power for electrical devices. In this study, the reasons for the weak efficiency of SWTs in charge applications of batteries are investigated and suggested structures to enhance the output power of the wind turbines are discussed. The study methodology is based on defining various study cases combining structural and operational parameters...
Update summarization can be a daunting task in automatic text summarization. It aims to distill evolved messages from a collection of new articles, under the assumption that the reader has already browsed the previous articles. In this paper, a number of state-of-the-art approaches were reviewed for extracting update summarization and then a method called DPC-TS was proposed. This approach is derived...
This work presents the control of active and reactive power, regardless, of DFIG (Double Field Induction Generator) typically used in electrical energy production and particularly in wind turbines. The machine is connected to a public network and operates as a generator. Its rotor is powered by a voltage of two-level inverter. We offer the control of the DFIG by two strategies, the first is based...
One of the most commonly used control methods for three phase converters is the so-called Direct Power Control (DPC), which is based on an appropriate selection of converter switching states via predefined switching table. One important feature of Direct Power Control strategy is the variable switching frequency due to the absence of Pulse Widths Modulation (PWM) block. However, a PWM generator can...
There is now general acceptance that the burning of fossil fuels is having a significant influence on the global climate. In this scenario renewable energies will have to contribute in energy diversity and security of supply. That the world's ever knows a similar rising need of energy. Wind energy is a promising technology and becomes more and more interesting player on the market of energy production...
in this paper a new Direct Power Control method of the Doubly Fed Induction Machine without the use of rotor position sensors is presented. The method is based on estimating the stator flux in the rotor reference frame, and then applying the correct rotor voltages to obtain the desired rotor flux and power. Estimation of the rotor position is done by comparing the measured values with the estimated...
In present work curing kinetics of UV-initiated cationic photo-polymerization of EPICLON series epoxy resin HP-820 and key cure process parameters, such as the extent of cross-linking and conversion, polymerization rate and the order of reactions have been studied by Photo-Differential Scanning Calorimetry (DPC). Different kinetics analysis results, including enthalpy of the reaction, induction time,...
It has been shown recently that dirty paper coding (DPC) achieves optimum sum-rate capacity in a multi-antenna broadcast channel with full channel state (CSI) information at the transmitter. With only partial feedback, random beamforming (RBF) is able to match the sumrate of DPC for large number of users. However, in the presence of spatial correlation, RBF incurs an SNR hit as compared to DPC. In...
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