in this paper, a new circuit is proposed for step-up z-source inverter based on qzsi (quasi-z-source inverter). the proposed topology inherits all advantages of the conventional topology. the proposed topology in comparison with conventional topology reduces the st (shoot-through) duty cycle by over 25% at the same voltage boost factor. theoretical analysis of the proposed qzsi in the st and no...

let  be a graded ring and  be a graded -module. we define a topology on graded prime spectrum  of the graded -module  which is analogous to that for , and investigate several properties of the topology.

in this paper, a pointwise pseudo-metric function on the l-realline is constructed. it is proved that the topology induced by this pointwisepseudo-metric is the usual topology.

In the context of longitudinally boost-invariant Bjorken flow with transverse expansion, we use three different numerical methods to analyze emergence attractor solutions in an ideal gas massless particles exhibiting constant shear viscosity entropy density ratio $\eta / s$. The fluid energy is initialized using a Gaussian profile plane, while $\chi = \mathcal{P}_L \mathcal{P}_T$ between longit...

We study phase shifts of the propagating slow waves in coronal loops invoking effects thermal conductivity, compressive viscosity, radiative losses and heating-cooling imbalance. derive a general dispersion relation solve it to determine density temperature perturbations relative velocity their dependence on equilibrium parameters ($\rho_0$, $T_0$). estimate difference ($\Delta \phi$) between i...

Abstract Consider an analytic Hamiltonian system near its invariant torus $\mathcal T_0$ carrying zero frequency. We assume that the Birkhoff normal form of at is convergent and has a particular form: it function non-degenerate quadratic part. prove in this case there canonical transformation—not just formal power series—bringing into form.

In this paper, a new circuit is proposed for step-up Z-source inverter based on QZSI (quasi-Z-source inverter). The proposed topology inherits all advantages of the conventional topology. The proposed topology in comparison with conventional topology reduces the ST (Shoot-through) duty cycle by over 25% at the same voltage boost factor. Theoretical analysis of the proposed qZSI in the ST and no...

In this paper, a new topology for cascaded multilevel inverter based on quasi-Z-source converter is proposed. In the proposed topology the magnitude of output DC voltage is not limited to the sum of magnitude of DC voltage sources. Moreover, the reliability of the circuit due to capability of short circuit by Z-source network is increased. The quasi-Z- source converter in different modes is ana...

Due to the favorable performance of structural topology optimization to create a proper understanding in the early stages of design, this issue is taken into consideration from the standpoint of research or industrial application in recent decades. Over the last three decades, several methods have been proposed for topology optimization. One of the methods that has been effectively used in stru...

In this paper a new topology for Dynamic Voltage Restorer (DVR) with high frequency link is proposed. This topology is able to compensate different types of voltage disturbances such as voltage sag, voltage swell and voltage harmonics. According to the obtained equations, this topology operates as a controllable current source to charge the series capacitor. Due to using High Frequency Transfor...