We prove that in a locally finite variety that has definable principal congruences (DPC), solvable congruences are nilpotent, and strongly solvable congruences are strongly abelian. As a corollary of the arguments we obtain that in a congruence modular variety with DPC, every solvable algebra can be decomposed as a direct product of nilpotent algebras of prime power size.

In this thesis, we introduce two distinct approaches – distance-aware scheduling and 2layer discrete power control (DPC), which are able to enhance the transmission capacity of a large-scale wireless ad hoc network. Transmission capacity is an area spectrum efficiency metric of a wireless ad hoc network with an outage constraint. The motivation of studying these two approaches is to investigate...

In this paper an iterative technique for sequential mobile power updates in 3G WCDMA networks based on Relaxation Method has been presented. The obtained algorithm is distributed and has the same complexity as the popular DPC (distributed power control) algorithm, which is based on Gauss-Seidel iterations, and which assumes simultaneous power updates for all mobiles that use the same frequency ...

– This paper presents theory, simulation and experimental verification of a new direct power control (DPC) method in comparison with the conventional switching table based method. In the presented strategy, hysteresis comparators and switching table are replaced by a PWM modulator. The required converter voltage in each sampling period is directly calculated based on measured currents and volta...

This paper discusses a control system for the converter of doubly fed induction generator (DFIG) driven by wind energy. The DFIG consists two main parts; rotor side (RSC) and grid (GSC). Two advanced methods GSC are presented here in this paper; vector strategy based on pulse width modulation (PWM) direct power (DPC). DPC is switching table voltage selection. In addition to position, quadrature...

Energy efficiency is a measure of performance in wireless networks. Therefore, controlling the transmitter power at a given node increases not only the operating life of the battery but also the overall system capacity by successfully admitting new links between a source and a destination. It is essential to find effective means of power control of point-to-point, broadcasting and multicasting ...

Recently, direct power control (DPC) based proportional-integral (PI) controllers have become dominant for doubly fed induction generators (DFIGs) due to its simplicity and good dynamic response. But this strategy gives a high total harmonic distortion (THD) of the voltage large ripple. In paper, new DPC method (called as NDPC-4L-NSVPWM) is proposed on four-level neural space vector pulse width...

In this paper, a direct power control (DPC) approach is proposed for grid-tied AC MG’s photovoltaic (PV) voltage source inverter (VSI) to regulate directly active and reactive powers by modulating microgrid’s (MG) point of common coupling (PCC) voltage. The PCC modulated (PVM) theory-based DPC method (PVMT-DPC) composed nonlinear PVM, damping, conventional feedforward feedback PI controllers. F...