نتایج جستجو برای: rectangular
تعداد نتایج: 22497 فیلتر نتایج به سال:
— Let x1, x2, . . . , xn be the zeroes of a polynomial P (x) of degree n and y1, y2, . . . , ym be the zeroes of another polynomial Q(y) of degree m. Our object of study is the permanent per(1/(xi − yj))1≤i≤n,1≤j≤m, here named “Scott-type” permanent, the case of P (x) = x − 1 and Q(y) = y + 1 having been considered by R. F. Scott. We present an efficient approach to determining explicit evaluat...
Packing rectangular shapes into a rectangular space is one of the most important discussions on Cutting & Packing problems (C;P) such as: cutting problem, bin-packing problem and distributor's pallet loading problem, etc. Assume a set of rectangular pieces with specific lengths, widths and utility values. Also assume a rectangular packing space with specific width and length. The objective fu...
The theory of generalized locally Toeplitz (GLT) sequences is a powerful apparatus for computing the asymptotic spectral distribution square matrices An arising from discretization differential problems. Indeed, as mesh fineness parameter n increases to â, sequence {An}n often turns out be GLT sequence. In this paper, motivated by recent applications, we further enhance developing full rectan...
Rectangular waveguide is one of the earliest types of transmission lines. Rectangular waveguide can be produced by hot extrusion process. In this paper, the hot extrusion process of CuZn5 rectangular waveguide was investigated by Finite Element Method (FEM). In addition, Genetic Algorithm (GA) was used to optimize the die geometry and process conditions to achieve the lowest magnitude of extrus...
In this research, mechanical buckling of rectangular plates of functionally graded materials (FGMs) is considered. Equilibrium and stability equations of a FGM rectangular plate under uniform in-plane compression are derived. For isotropic materials, convergent buckling loads have been presented for non-uniformly compressed rectangular plates based on a rigorous superposition fourier solution f...
the methods which are used to analyze microstrip antennas, are divited into three categories: empirical methods, semi-empirical methods and full-wave analysis. empirical and semi-empirical methods are generally based on some fundamental simplifying assumptions about quality of surface current distribution and substrate thickness. thses simplificatioms cause low accuracy in field evaluation. ful...
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