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Variable-length capabilities as a solution to the small-object problem

Edward F. Gehringer
1979 Proceedings of the seventh symposium on Operating systems principles - SOSP '79  
This is achieved by a generalization of tagged memory to encompass extended data types; and by the use of variable-length capabilities, which can be very short if they are close to the object they reference  ...  This paper presents a scheme for representing both large and small entitles In a computation, down to Integers and character strings, as objects.  ...  Fabry provided detailed comments which helped improve the clarity of the presentation.  ... 
doi:10.1145/800215.806581 dblp:conf/sosp/Gehringer79 fatcat:yqryq5wulvgr7jjsvxtf7fri7i

Artificial Immune System Based Local Search for Solving Multi-Objective Design Problems

Adel M. El-Refaey
2017 American Journal of Neural Networks and Applications  
inductance and minimum volume as the objective functions.  ...  The proposed approach uses Local search, dominance principle and feasibility to identify solutions that deserve to be cloned.  ...  In the two design problems the proposed approach explore large objective space that other evolutionary algorithms. to the (nonempty) feasible region (set) S, which is a subset of the decision variable  ... 
doi:10.11648/j.ajnna.20170303.11 fatcat:yxvqji5ypndq5jzkbze7xhxm4i


2013 International Journal of Power System Operation and Energy Management  
The objective of OPF is defined that not only to minimize total generation cost but also to improve the bus voltage profile..  ...  In this method, the individual is the binary-coded representation that contains a mixture of continuous and discrete control variables, and crossover and mutation schemes are proposed to deal with continuous  ...  The GAOPF method is not sensitive to the starting points and capable to determining the global optimum solution to the OPF for a range of constraints and objective functions.  ... 
doi:10.47893/ijpsoem.2013.1072 fatcat:ohshopxacngydikxhr5yt434ru

Optimization of Open Canal Cross Sections by Differential Evolution Algorithm

Mustafa Turan, Mehmet Yurdusev
2011 Mathematical and Computational Applications  
It is observed that differential evolution algorithm can be well applicable to the problem and capable of giving the global optima.  ...  As such, they may require substantial amount of investment depending on its length and cross section. Therefore, cross section design should be carried out on an optimization basis.  ...  DEFINITION OF THE PROBLEM The solution to an optimization problem aims to find global optima.  ... 
doi:10.3390/mca16010077 fatcat:in7v6pk7tvejzdn6z2ffjjdmgm

Evolutionary-Computation Based Risk Assessment of Aircraft Landing Sequencing Algorithms [chapter]

Wenjing Zhao, Jiangjun Tang, Sameer Alam, Axel Bender, Hussein A. Abbass
2010 IFIP Advances in Information and Communication Technology  
So far, MEBRA has only been applied to a limited number of problems. Here we demonstrate its viability to efficiently detect hot spots in an algorithm's problem space.  ...  In particular, we find that the variable-length chromosome representation of aircraft scheduling sequence scenarios converges fast and finds all relevant risk patterns associated with the use of FCFS and  ...  This indicates that the variable-length patterns are some sort of building blocks in this problem and that it is more efficient to evolve building blocks directly than to evolve the solution vector as  ... 
doi:10.1007/978-3-642-15234-4_25 fatcat:g2ndwthixrgxnpe2l44mo2pjie

Scheduling in Single-Hop Multiple Access Wireless Networks with Successive Interference Cancellation

2014 IEEE Wireless Communications Letters  
We first formulate the optimal scheduling as a Linear Programming (LP) problem where each variable represents the time allocated to a subset of the links sorted according to their decoding order for SIC  ...  Since the LP formulation requires a high number of variables exponential in the decoding capability of the receiver, we propose a Column Generation Method (CGM) based heuristic algorithm.  ...  The schedule length then further decreases as the decoding capability of the receiver increases but with diminishing improvements.  ... 
doi:10.1109/wcl.2014.012114.130807 fatcat:pytp74ydpfg3tc5r7n7kxvsdhe

Examination of multi-objective optimization method for global search using DIRECT and GA

Luyi Wang, Hiroyuki Ishida, Tomoyuki Hiroyasu, Mitsunori Miki
2008 2008 IEEE Congress on Evolutionary Computation (IEEE World Congress on Computational Intelligence)  
A number of multi-objective genetic algorithms (MOGAs) have been developed to obtain Pareto optimal solutions for multi-objective optimization problems.  ...  In this paper, we propose an optimization method called NSDIRECT-GA to conduct a global search over as much as possible of the design variable space, which improves the reliability of the obtained Pareto  ...  Therefore, it is necessary to consider a mechanism to perform a global search of the design variable space as much as possible, and to improve the reliability of the obtained Pareto solutions.  ... 
doi:10.1109/cec.2008.4631125 dblp:conf/cec/WangIHM08 fatcat:tm23ogkz5nfjhhogn3iinuiccm


Mutawkil Suliman
2011 International Conference on Aerospace Sciences and Aviation Technology  
The capability of these algorithms to determine highly efficient and robust missile aerodynamic designs is demonstrated by giving a variety of design variables and constraints.  ...  The use of genetic algorithms with the aid of the panel method to determine highefficiency missile aerodynamic shape has been examined.  ...  So it is better than the traditional search method by its capability to evolve the candidate solution and its ability to solve both single and multi-objective (goal) problems.  ... 
doi:10.21608/asat.2011.27138 fatcat:6zi6qgp2f5dndhnldl4dr5exga

Wireless Heterogeneous Transmitter Placement Using Multiobjective Variable-Length Genetic Algorithm

Chuan-Kang Ting, Chung-Nan Lee, Hui-Chun Chang, Jain-Shing Wu
2009 IEEE Transactions on Systems Man and Cybernetics Part B (Cybernetics)  
This paper presents a novel multiobjective variable-length genetic algorithm to solve this problem.  ...  The problem of placing wireless transmitters to meet particular objectives, such as coverage and cost, has proven to be NP-hard.  ...  ACKNOWLEDGMENT The authors would like to thank the reviewers and the Associate Editor for their valuable comments and suggestions, and C.K.  ... 
doi:10.1109/tsmcb.2008.2010951 pmid:19362914 fatcat:b7ny6dedzjhilc7s3mjmmisplq

Topology Optimization Approach for the Determination of the Multiple-Configuration Morphing Wing Structure

Daisaku Inoyama, Brian P. Sanders, James J. Joo
2008 Journal of Aircraft  
Finally, side constraints are applied to design variables as in the standard topology optimization problem, in which design variables are allowed to vary from a small positive number p “unity.  ...  Suppose the objective of a problem is to achieve a shape-matching of a single target point.  ... 
doi:10.2514/1.29988 fatcat:vr7gyzy3wve55l3khgfvo5jyzy

Mathematical optimization and the synchronizing properties of encodings

Larry E. Stanfel
1988 Information and Computation  
In particular it is shown how to formulate the requirement that a code be anagrammatic and the requirement for minimal synchronizing delay as linear integer programming problems.  ...  Several examples, solved by a commercially available linear/integer programming package, are included. s@?  ...  ACKNOWLEDGMENTS The author is indebted to Shawn DePierri for her diligence in programming the complex string manipulations necessary to generate the optimization problems and to compute synchronizing delays  ... 
doi:10.1016/0890-5401(88)90045-4 fatcat:4uqy2y7dg5azlkigq6bgauzmni

Multi-Objective Optimization of Multimedia Packet Scheduling for Adhoc Networks Through Hybridized Genetic Algorithm

R Muthu Selvi, R.Rajaram
2011 The International Journal of Multimedia & Its Applications  
This paper presents a new approach to optimize the schedule of the variable length multimedia packets in Ad hoc networks using hybridized Genetic Algorithm (HGA).Existing algorithm called Virtual Deadline  ...  HGA overcomes the problem of updating the service constraints that leads to the increased time complexity.  ...  variable packet length and the minimum number of packets that must be serviced for a given window are the conflicting objectives, HGA is able to find an optimal solution and it produces an optimized scheduling  ... 
doi:10.5121/ijma.2011.3309 fatcat:m2urczdhbjhmzebdnmvudbklcu

GAPRUS—genetic algorithms based pipe routing using tessellated objects

Sunand Sandurkar, Wei Chen
1999 Computers in industry (Print)  
Representation of the objects and pipes in the tessellated format offers huge benefits in computation as well as usage.  ...  A nondeterministic optimization approach based on Genetic Algorithms is proposed to generate pipe routing solution sets with a good searching efficiency.  ...  ACKNOWLEDGEMENTS The authors wish to thank Matthew Wall at Massachusetts Institute of Technology for letting us use GALib (Genetic Algorithm Library) for this research.  ... 
doi:10.1016/s0166-3615(98)00130-4 fatcat:tpkmarwjtfdk5eleaz3yn5elei

An Evolutionary Computational Approach for Designing Micro Hydro Power Plants

Alejandro Tapia Córdoba, Daniel Gutiérrez Reina, Pablo Millán Gata
2019 Energies  
The problem is formulated in both single-objective (minimization of the cost) and multi-objective (minimization of the cost and maximization of the generated power) modes, the Pareto dominance being studied  ...  This paper proposes a Genetic Algorithm (GA) to address the problem of finding the optimal layout for an MHPP based on real scenario data, obtained by means of a set of experimental topographic measurements  ...  In addition, the GA approach is capable of addressing a more complex and realistic problem, where the penstock diameter is also considered as a design variable.  ... 
doi:10.3390/en12050878 fatcat:nlolzbhvejdhhn5kugbrzyei54

Students' Mathematisation in Solving Mathematical Literacy Problems with Space and Shape Contents

Lestariningsih, S M Amin, A Lukito, M Lutfianto
2018 Journal of Physics, Conference Series  
Students' mathematisation was a principal process in solving mathematical literacy problem with space and shape contents, so it was important to emerge students' mathematisation in the mathematical classroom  ...  procedures) and indirect (mathematical reasoning) to obtain mathematical solutions, 3) summarising the results obtained from the counting operations that have been performed, and the last 4)stating that  ...  Acknowledgment We would like to thank Ministry of Higher Education and Research on a doctoral dissertation research grant.  ... 
doi:10.1088/1742-6596/1108/1/012083 fatcat:urfqf62sirckzkhirimaaujlsu
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