In this paper, we develop a new method to produce explicit formulas for the number fG(n) of rooted spanning forests in circulant graphs G = Cn(s1,s2,…,sk) and C2n(s1,s2,…,sk,n). These are expressed through Chebyshev polynomials. We prove that both cases can be represented form p a(n)2, where a(n) is an integer sequence certain natural depending on parity n. Finally, find asymptotic formula Mahl...

Abstract: This paper presents a recent popular power inverter which is impedance source or Z-source inverter (ZSI) and the comparison and analysis of two conventional PWM techniques of Z-source inverter. Due to the impedance network it couples inverter main circuit to the power source thus providing special features that can overcome the limitations of traditional voltage source inverter (VSI) ...

This paper presents an algorithm which converts combinational circuits into pipelined datu paths under considerotion of U given clock priod. The approach minimizes the number of registers which is achieved by a recursive procedure selecting jor each pipeline level those circuit parts where U register location satisfies the timing constraints. The selection is based on an as-soon-as-possible and...

This paper presents an efficient power conditioning system for PV power system generation. The proposed Photovoltaic Power Conditioning System (PVPCS) used a single-stage single-phase Z-Source Inverter (ZSI) integrate with a relatively new evolutionary optimization algorithm known as the Differential Evolution (DE) as the Maximum Power Point (MPP) Tracker. Utilization of single-stage power cond...

In this paper the Space Vector Control Scheme is implemented for a Wind Energy System using Three Level Impedance Source Inverter (ZSI). The wind energy system uses a Self Excited Induction generator (SEIG) which is the most emerging application in the field of Wind Energy Conversion System (WECS). The proposed system is modelled with a generator-side Diode Bridge Rectifier and a Stand-Alone si...