In the system with multi-sources and multi-loads, the shunt active power(SAPF) filter could not work effectively by the reason of difficulty to detect the all the load current or source current by an ...APF. Aiming to solve the problem, this paper presents a novel control algorithm of APF based on PCC voltage detection without current detection. The paper analyzes the relationship between the PCC voltage and the load harmonic current, and focuses on the research about the control algorithm. Simulations for the shunt active power filter are implemented and the experimental results confirm the theoretical analysis.
Motivated by the fact that septuple-atomic-layer MnBi$_2$Te$_4$ can be
structurally viewed as the combination of double-atomic-layer MnTe
intercalating into quintuple-atomic-layer Bi$_2$Te$_3$, we ...present a general
approach of constructing twelve septuple-atomic-layer $\alpha_i$- and
$\beta_i$-$MA_2Z_4$ monolayer family (\emph{i} = 1 to 6) by intercalating
MoS$_2$-type $MZ$$_2$ monolayer into InSe-type A$_2$Z$_2$ monolayer. Besides
reproducing the experimentally synthesized $\alpha_1$-MoSi$_2$N$_4$,
$\alpha_1$-WSi$_2$N$_4$ and $\beta_5$-MnBi$_2$Te$_4$ monolayer materials,
another 66 thermodynamically and dynamically stable $MA_2Z_4$ were predicted,
which span a wide range of properties upon the number of valence electrons
(VEC). $MA_2Z_4$ with the rules of 32 or 34 VEC are mostly semiconductors with
direct or indirect band gap and, however, with 33 VEC are generally metal,
half-metal ferromagnetism, or spin-gapless semiconductor upon whether or not an
unpaired electron is spin polarized. Moreover, we propose
$\alpha_2$-WSi$_2$P$_4$ for the spin-valley polarization,
$\alpha_1$-TaSi$_2$N$_4$ for Ising superconductor and $\beta_2$-SrGa$_2$Se$_4$
for topological insulator.
The ability to tune magnetic orders, such as magnetic anisotropy and topological spin texture, is desired in order to achieve high-performance spintronic devices. A recent strategy has been to employ ...interfacial engineering techniques, such as the introduction of spin-correlated interfacial coupling, to tailor magnetic orders and achieve novel magnetic properties. We chose a unique polar-nonpolar LaMnO3/SrIrO3 superlattice because Mn (3d)/Ir (5d) oxides exhibit rich magnetic behaviors and strong spin-orbit coupling through the entanglement of their 3d and 5d electrons. Through magnetization and magnetotransport measurements, we found that the magnetic order is interface-dominated as the superlattice period is decreased. We were able to then effectively modify the magnetization, tilt of the ferromagnetic easy axis, and symmetry transition of the anisotropic magnetoresistance of the LaMnO3/SrIrO3 superlattice by introducing additional Mn (3d) and Ir (5d) interfaces. Further investigations using in-depth first-principles calculations and numerical simulations revealed that these magnetic behaviors could be understood by the 3d/5d electron correlation and Rashba spin-orbit coupling. The results reported here demonstrate a new route to synchronously engineer magnetic properties through the atomic stacking of different electrons, contributing to future applications.
Motivated by the fact that septuple-atomic-layer MnBi\(_2\)Te\(_4\) can be structurally viewed as the combination of double-atomic-layer MnTe intercalating into quintuple-atomic-layer ...Bi\(_2\)Te\(_3\), we present a general approach of constructing twelve septuple-atomic-layer \(\alpha_i\)- and \(\beta_i\)-\(MA_2Z_4\) monolayer family (\emph{i} = 1 to 6) by intercalating MoS\(_2\)-type $MZ$$_2\( monolayer into InSe-type A\)_2\(Z\)_2\( monolayer. Besides reproducing the experimentally synthesized \)\alpha_1\(-MoSi\)_2\(N\)_4\(, \)\alpha_1\(-WSi\)_2\(N\)_4\( and \)\beta_5\(-MnBi\)_2\(Te\)_4\( monolayer materials, another 66 thermodynamically and dynamically stable \)MA_2Z_4\( were predicted, which span a wide range of properties upon the number of valence electrons (VEC). \)MA_2Z_4\( with the rules of 32 or 34 VEC are mostly semiconductors with direct or indirect band gap and, however, with 33 VEC are generally metal, half-metal ferromagnetism, or spin-gapless semiconductor upon whether or not an unpaired electron is spin polarized. Moreover, we propose \)\alpha_2\(-WSi\)_2\(P\)_4\( for the spin-valley polarization, \)\alpha_1\(-TaSi\)_2\(N\)_4\( for Ising superconductor and \)\beta_2\(-SrGa\)_2\(Se\)_4$ for topological insulator.
Interfacial magnetism at transition-metal oxide interfaces is of tremendous interest. The emergence of ferromagnetism and a matrix-dependent charge transfer between Co and Mn ions in the ...interdiffusion region of compressively strained LaMnO
3
-LaCoO
3
superlattices (SLs) were studied. The SLs exhibit considerable ferromagnetism, which is negligible in both constituents. This is explained by the matrix-dependent charge transfer between Co and Mn ions. That is, the valence state of diffused Co ions into LaMnO
3
shifts from 3+ to 2+ by adopting one electron from Mn
3+
, inducing the same amount of Mn
4+
, while the Mn ions that diffuses into LaCoO
3
remains Mn
3+
.
Matrix-dependent charge transfer effect was induced by the interplay between intrinsic and extrinsic effect in transition-metal oxides superlattices, which could be used to site-selectively modulate the electronic and magnetic states.
Using a lattice model based on Monte Carlo simulations, we study the role of
the reproduction pattern on the fate of an evolving population. Each individual
is under the selection pressure from the ...environment and random mutations. The
habitat ("climate") is changing periodically. Evolutions of populations
following two reproduction patterns are compared, asexual and sexual. We show,
via Monte Carlo simulations, that sexual reproduction by keeping more
diversified populations gives them better chances to adapt themselves to the
changing environment. However, in order to obtain a greater chance to mate, the
birth rate should be high. In the case of low birth rate and high mutation
probability there is a preference for the asexual reproduction.
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