scholarly journals Computationally‐efficient design optimisation of antennas by accelerated gradient search with sensitivity and design change monitoring

2019 ◽  
Vol 14 (2) ◽  
pp. 165-170 ◽  
Author(s):  
Anna Pietrenko‐Dabrowska ◽  
Slawomir Koziel
Keyword(s):  
Efficient Design ◽  
Gradient Search ◽  
Computationally Efficient ◽  
Design Optimisation ◽  
Design Change ◽  
Accelerated Gradient ◽  
Change Monitoring

Design optimisation for cold-formed steel residential roof truss using genetic algorithm

2018 ◽  
Vol 15 (5) ◽  
pp. 575-583
Author(s):  
Ka Yee Kok ◽  
Hieng Ho Lau ◽  
Thanh Duoc Phan ◽  
TIina Chui Huon Ting
Keyword(s):  
Genetic Algorithm ◽  
Industrial Application ◽  
Steel Structures ◽  
Single Type ◽  
Efficient Design ◽  
Design Optimisation ◽  
Content Type ◽  
Roof Truss ◽  
Cold Formed Steel ◽  
Multi Level

Purpose This paper aims to present the design optimisation using genetic algorithm (GA) to achieve the highest strength to weight (S/W) ratio, for cold-formed steel residential roof truss. Design/methodology/approach The GA developed in this research simultaneously optimises roof pitch, truss configurations, joint coordinates and applied loading of typical dual-pitched symmetrical residential roof truss. The residential roof truss was considered with incremental uniform distributed loading, in both gravitational and uplift directions. The structural analyses of trusses were executed in this GA using finite element toolbox. The ultimate strength and serviceability of trusses were checked through the design formulation implemented in GA, according to the Australian standard, AS/NZS 4600 Cold-formed Steel Structures. Findings An optimum double-Fink roof truss which possess highest S/W ratio using GA was determined, with optimum roof pitch of 15°. The optimised roof truss is suitable for industrial application with its higher S/W ratio and cost-effectiveness. The combined methodology of multi-level optimisation and simultaneous optimisation developed in this research could determine optimum roof truss with consistent S/W ratio, although with huge GA search space. Research limitations/implications The sizing of roof truss member is not optimised in this paper. Only single type of cold-formed steel section is used throughout the whole optimisation. The design of truss connection is not considered in this paper. The corresponding connection costs are not included in the proposed optimisation. Practical implications The optimum roof truss presented in this paper is suitable for industrial application with higher S/W ratio and lower cost, in either gravitational or uplift loading configurations. Originality/value This research demonstrates the approaches in combining multi-level optimisation and simultaneous optimisation to handle large number of variables and hence executed an efficient design optimisation. The GA designed in this research determines the optimum residential roof truss with highest S/W ratio, instead of lightest truss weight in previous studies.

scholarly journals Computationally efficient design of directionally compliant metamaterials

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Lucas A. Shaw ◽  
Frederick Sun ◽  
Carlos M. Portela ◽  
Rodolfo I. Barranco ◽  
Julia R. Greer ◽  
...  
Keyword(s):  
Efficient Design ◽  
Computationally Efficient

scholarly journals Efficient design optimisation for UAV-enabled mobile edge computing in cognitive radio networks

2020 ◽  
Vol 14 (15) ◽  
pp. 2509-2515
Author(s):  
Yu Pan ◽  
Xinyu Da ◽  
Hang Hu ◽  
Lei Ni ◽  
Ruiyang Xu ◽  
...  
Keyword(s):  
Cognitive Radio ◽  
Cognitive Radio Networks ◽  
Radio Networks ◽  
Edge Computing ◽  
Mobile Edge Computing ◽  
Efficient Design ◽  
Design Optimisation

Derivational Economy in Syntax and Semantics

2017 ◽  
Author(s):  
Željko Bošković ◽  
Troy Messick
Keyword(s):  
Syntactic Structure ◽  
Universal Grammar ◽  
Minimalist Program ◽  
Efficient Design ◽  
Computationally Efficient ◽  
Computational System ◽  
Language Faculty ◽  
Generative Theory ◽  
Guiding Principles ◽  
Syntactic Dependencies

Economy considerations have always played an important role in the generative theory of grammar. They are particularly prominent in the most recent instantiation of this approach, the Minimalist Program, which explores the possibility that Universal Grammar is an optimal way of satisfying requirements that are imposed on the language faculty by the external systems that interface with the language faculty which is also characterized by optimal, computationally efficient design. In this respect, the operations of the computational system that produce linguistic expressions must be optimal in that they must satisfy general considerations of simplicity and efficient design. Simply put, the guiding principles here are (a) do something only if you need to and (b) if you do need to, do it in the most economical/efficient way. These considerations ban superfluous steps in derivations and superfluous symbols in representations. Under economy guidelines, movement takes place only when there is a need for it (with both syntactic and semantic considerations playing a role here), and when it does take place, it takes place in the most economical way: it is as short as possible and carries as little material as possible. Furthermore, economy is evaluated locally, on the basis of immediately available structure. The locality of syntactic dependencies is also enforced by minimal search and by limiting the number of syntactic objects and the amount of structure accessible in the derivation. This is achieved by transferring parts of syntactic structure to the interfaces during the derivation, the transferred parts not being accessible for further syntactic operations.

Computationally Efficient Design and Optimization Approach of PMa-SynRM in Frequent Operating Torque–Speed Range

2018 ◽  
Vol 33 (4) ◽  
pp. 1776-1786 ◽  
Author(s):  
Carlos Lopez-Torres ◽  
Antonio Garcia ◽  
Jordi-Roger Riba ◽  
Gerhard Lux ◽  
Luis Romeral
Keyword(s):  
Optimization Approach ◽  
Efficient Design ◽  
Computationally Efficient ◽  
Design And Optimization ◽  
Speed Range
Sign in / Sign up

Export Citation Format

Share Document