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Start Over Coverage 307-321

1. On the oscillation of certain neutral difference equations.

Creator:
Grace, S.R. and Hamedani, G.G.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
nonlinear neutral difference equations, oscillation, asymptotic behavior, oscillatory solutions, and asymptotic behavior of solutions
Language:
English
Description:
Various new criteria for the oscillation of nonlinear neutral difference equations of the form Δi (xn — x n - h) + qn\xn~g\c sgns n -9 =0 , i = 1,2,3 and c > 0, are established.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

2. Optimisation of building structures I (DBSO)

Creator:
Plšek, Jan and Štěpánek, Petr
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
optimization, building, structures, and RBSO
Language:
English
Description:
The contribution deals with a deterministic-based structural optimisation (DBSO). The instroductory part of the paper covers a short overview of optimisation algorithms applicable to deterministic-based problems, general DBSO formulation and a target function(s) pattern for structural design. The following part gives attention to particular problem of general RC (reinforced concrete) cross-sectional design subjected to normal force and bending moments (ULS, i.e. ultimate limit state), where basic cross-sectional characteristics (cross-sectional dimensions, steel bars profiles and types of materials constitute an optimisation space with discrete attributes. The target function (including economical and ecological aspects) and principle problem solution(s) is defined and an illlustrative numerical example of a simple rectangular cross-section design is presented. The solution approach is further augmented to RC frame structures problems and a numerical example of a collector tube design is presented. and Obsahuje seznam literatury
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public