نتایج جستجو برای: co pi matrix
تعداد نتایج: 725636 فیلتر نتایج به سال:
This paper presents the comparison of performance between PI and PID control scheme of Matrix Converter fed Induction Motor Drive. For the performance comparison modeling and simulation is done for both PI and PID control scheme of Matrix Converter, controlling the Induction Motor Drive. Simulation model consists a three phase matrix converter, an induction motor, a field oriented controller an...
We use results from the theory of algebras with polynomial identities (PI algebras) to study the witness complexity of matrix identities. A matrix identity of d× d matrices over a field F is a non-commutative polynomial f(x1, . . . , xn) over F, such that f vanishes on every d×d matrix assignment to its variables. For any field F of characteristic 0, any d > 2 and any finite basis of d× d matri...
Phytic acid (PA) is a major source of inorganic phosphate (Pi) in the soil; however, the plant lacks the capacity to utilize it for Pi nutrition and growth. Microbial phytases constitute a group of enzymes that are able to remobilize Pi from PA. Thus, the use of these phytases to increase the capacity of higher plants to remobilize Pi from PA is of agronomical interest. In the current study, we...
In this paper, a statcom without any energy storage devices is proposed to compensate network voltage during disturbances. This statcom utilizes a matrix converter in its topology which eliminates the DC-link capacitor of conventional statcom. The modulation method for matrix converter which is used in this paper is space vector modulation. There are some methods to improve power quality for se...
In this paper, we gives an upper bound estimation of the spectral norm for matrices A and B such that the entries in the first row of n×n r-circulant matrix A = Circr(a1, a2, . . . , an) and n×n symmetric r-circulant matrix B = SCircr(a1, a2, . . . , an) are ai = Pi or ai = P 2 i or ai = Pi−1 or ai = P 2 i−1, where {Pi}i=0 is Padovan sequence. At the last section, some illustrative numerical ex...
شناسایی حروف نوشتاری و نوری نقش مهمی در کاربردهای جدیدی مثل پزشکی و حمل و نقل و سیستم های امنیتی دارد. تاکنون سیستم های شناسایی حروف مختلفی ارائه شده است که هرکدام در یک زمینه کاربردی بکار می روند.در این پایان نامه یک روش جدی برای شناسایی حروف انگلیسی بر مبنای ماتریس gray level co-occurrence matrix (glcm) ارائه شده است.ماتریس glcm بطور وسیعی در کاربرد دسته بندی بافت استفاده می شود. بعد از یک سر...
The synthesis of a cyclometallated Pt(II) thiolate carbonyl complex Pt(thpy)(CO)(mts), (thpy = 2-(2'-thienyl)-pyridinate, mts = methylthiosalicylate) is reported. A combination of emission and time-resolved infrared (TRIR) techniques revealed for both Pt(thpy)(CO)(mts) and its chloride analogue Pt(thpy)(CO)Cl the predominant intra 2-(2'-thienyl)-pyridinate 3pi pi* character of the lowest electr...
A homogeneous solution of Co(II) in acetate buffer at pH 7 is found to be an efficient water oxidation catalyst (WOC) showing significantly greater current density than Co(II) in phosphate buffer (Co-Pi) under identical conditions owing to the higher solubility of the former. When electrodeposited on ITO/FTO electrodes it forms acetate bound cobalt(II)-oxide materials (Co-Ac-WOC) showing a cata...
Upon detachment from the extracellular matrix, epithelial cells enter into programmed cell death, a phenomenon known as anoikis, ensuring that they are unable to survive in an inappropriate location. Activated ras oncogenes protect cells from this form of apoptosis. The nature of the survival signals activated by integrin engagement and usurped by oncogenic Ras are unknown: here we show that in...
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