Results 1 to 10 of about 2,430,570 (319)
Exact solution of the robust knapsack problem.
Comput Oper Res, 2013 We consider an uncertain variant of the knapsack problem in which the weight of the items is not exactly known in advance, but belongs to a given interval, and an upper bound is imposed on the number of items whose weight differs from the expected one. For this problem, we provide a dynamic programming algorithm and present techniques aimed at reducing
Monaci M, Pferschy U, Serafini P.
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On the Exact Solution for the Schrödinger Equation
ParticlesFor almost 75 years, the general solution for the Schrödinger equation was assumed to be generated by an exponential or a time-ordered exponential known as the Dyson series.
Yair Mulian
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Analytical and Numerical Solution of Heat Transfer Equation in Rectangular Composite Fins [PDF]
Mechanics of Advanced Composite Structures, 2022 Today, the use of composites has received widespread attention due to their special properties that cannot be found in alloys. Kevlar-Epoxy composite is one of the most widely used materials. In this paper, we analyze the heat transfer in rectangular fin
Mohsen Hajinejad Sorkhi +1 more
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Exact and Approximate Solutions for Some Classes of the Inhomogeneous Pantograph Equation
Axioms, 2023 The standard pantograph delay equation (SPDDE) is one of the famous delay models. This standard model is basically homogeneous in nature and it has been extensively studied in the literature. However, the studies on the general inhomogeneous form of such
A. A. Al Qarni
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EXACT INFLATIONARY SOLUTIONS [PDF]
International Journal of Modern Physics D, 1998 We present a new class of exact inflationary solutions for the evolution of a universe with spatial curvature, filled with a perfect fluid, a scalar field with potential V±(ϕ) = λ(ϕ2 ± δ2)2 and a cosmological constant Λ. With the V+(ϕ) potential and a negative cosmological constant, the scale factor experiments a graceful exit.
Merced Montesinos-Velásquez +2 more
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Exact solution for granular flows [PDF]
International Journal for Numerical and Analytical Methods in Geomechanics, 2012 SUMMARYIn this paper, we present the exact solution of the Riemann problem for the nonlinear one‐dimensional so‐called shallow‐water or Saint‐Venant equations with friction proposed by SAVAGE and HUTTER to describe debris avalanches. This model is based on the depth‐averaged thin layer approximation of granular flows over sloping beds and takes into ...
Faccanoni, Gloria, Mangeney, Anne
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EXACT SOLUTION OF THE PROBLEM OF DEFLECTION OF A TRUSS WITH AN ARBITRARY NUMBER OF PANELS IN THE MAPLE SYSTEM [PDF]
Stroitel’stvo: Nauka i Obrazovanie, 2017 This article presents the formulae derived for statically determinate flat truss under load evenly distributed in the lower boom depending on the number of panels. The truss lattice with lowering diagonals is symmetric with respect to the middle.
Kirsanov Mikhail Nikolaevich
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ANALYSIS OF THE DEFLECTION OF A TRUSS WITH A DECORATIVE LATTICE [PDF]
Stroitel’stvo: Nauka i Obrazovanie, 2019 Introduction. A scheme is proposed for a planar symmetric statically determinate beam truss with a rectilinear lower belt, struts, multidirectional braces and a polygonal outline of the upper belt.
Mikhail N. Kirsanov
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New Anisotropic Exact Solution in Multifield Cosmology
Universe, 2021 In the case of two-scalar field cosmology, and specifically for the Chiral model, we determine an exact solution for the field equations with an anisotropic background space.
Andronikos Paliathanasis
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Exact solutions in massive gravity [PDF]
Classical and Quantum Gravity, 2013 17 pages, 4 figures.
Gustavo Niz +3 more
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