This study aimed to develop a three-phase permanent-magnet synchronous motor drive system with improvement in current harmonics. Considering the harmonic components induced electromotive force of motor, offline response (EMF) was measured for fast Fourier analysis, main were obtained, and voltage required reduce corresponding direct (d-axis) quadrature (q-axis) axes calculated. In closed-loop c...

A smooth coupling is implemented between the grid and doubly fed induction generator-based wind turbines (DFIG-WTs) during voltage imbalance. The nonlinear characteristics of a grid-connected DFIG-WT system may increase stresses on mechanical electrical components turbines. Such difficulties are greatly increased periods Consequently, in this paper, new control scheme proposed to regulate DFIGs...

Nonreciprocal responses of noncentrosymmetric quantum materials attract recent intensive interests, which is essential for the rectification function in diodes. A breakthrough discovery superconducting diode effect. The principle to enlarge effect highly desired guide design diode. Here, we study theoretically Josephson junction S/FI/S (S: $d$-wave superconductor, FI: ferromagnetic insulator) o...

We study multiplier theorems on a vector-valued function space, which is generalization of the results Calderón and Torchinsky, Grafakos, He, Honzík, Nguyen, an improvement result Triebel. For $$0\frac{d}{s-(d/\min {(1,p,q)}-d)}$$ , then $$\begin{aligned} \big \Vert \{\big ( m_k \widehat{f_k}\big )^{\vee }\big \}_{k\in {\mathbb {Z}}}\big _{L^p(...

‎The present paper is devoted to the existence and uniqueness result of the fractional evolution equation $D^{q}_c u(t)=g(t,u(t))=Au(t)+f(t)$‎ ‎for the real $qin (0,1)$ with the initial value $u(0)=u_{0}intilde{R}$‎, ‎where $tilde{R}$ is the set of all generalized real numbers and $A$ is an operator defined from $mathcal G$ into itself‎. Here the Caputo fractional derivative $D^{q}_c$ is used i...

We construct quantum MDS codes with parameters $$ [\![ q^2+1,q^2+3-2d,d ]\!] _q$$ for all $$d \leqslant q+1$$ , \ne q$$ . These are shown to exist by proving that there classical generalised Reed–Solomon which contain their Hermitian dual. constructions include many were previously known but in some cases these new. go on prove if $$d\geqslant q+2$$ then is no $$[n,n-d+1,d]_{q^2}$$ code contain...

I let q ∈ {0, 1} and d ∈ {0, 1} be query and document vectors, dimensions indicating word occurrence for dictionaries of size Q and D I score function f(q,d) = qWd = ∑Q i=1 ∑D j=1 qiWijdj , where W ∈ RQ×D is a matrix of word associations between query and document dictionaries I R is a set of tuples (q,d+,d−), document d being more relevant for query q than d− I relevance rank rq,d, rank di ere...

the prime graph $gamma(g)$ of a group $g$ is a graph with vertex set $pi(g)$, the set of primes dividing the order of $g$, and two distinct vertices $p$ and $q$ are adjacent by an edge written $psim q$ if there is an element in $g$ of order $pq$. let $pi(g)={p_{1},p_{2},...,p_{k}}$. for $pinpi(g)$, set $deg(p):=|{q inpi(g)| psim q}|$, which is called the degree of $p$. we also set $d(g):...

One of the interesting problems in coding theory is to determine the valuenq(k, d) which denotes the smallest number n such that an [n, k,d]q code existsfor given k, d and q.For k ≤ 5, there are many results for q ≤ 5 and for k = 6, the results areconcentrated in the ternary code ([1],[3]). In this talk, we concentrated in theproblem to find the exact value nq(6, d)....