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- research-articleJune 2020
If unsure, shuffle: deductive sort is Θ(MN3), but O(MN2) in expectation over input permutations
GECCO '20: Proceedings of the 2020 Genetic and Evolutionary Computation ConferencePages 516–523https://doi.org/10.1145/3377930.3390246Despite significant advantages in theory of evolutionary computation, many papers related to evolutionary algorithms still lack proper analysis and limit themselves by rather vague reflections on why making a certain design choice improves the ...
- research-articleJune 2020
The node weight dependent traveling salesperson problem: approximation algorithms and randomized search heuristics
GECCO '20: Proceedings of the 2020 Genetic and Evolutionary Computation ConferencePages 1286–1294https://doi.org/10.1145/3377930.3390243Several important optimization problems in the area of vehicle routing can be seen as variants of the classical Traveling Salesperson Problem (TSP). In the area of evolutionary computation, the Traveling Thief Problem (TTP) has gained increasing ...
- research-articleJune 2020
Constraint handling within MOEA/D through an additional scalarizing function
GECCO '20: Proceedings of the 2020 Genetic and Evolutionary Computation ConferencePages 595–602https://doi.org/10.1145/3377930.3390240The Multi-Objective Evolutionary Algorithm based on Decomposition (MOEA/D) has shown high-performance levels when solving complicated multi-objective optimization problems. However, its adaptation for dealing with constrained multi-objective ...
- research-articleJune 2020
New search operators for node-depth based encoding
GECCO '20: Proceedings of the 2020 Genetic and Evolutionary Computation ConferencePages 734–741https://doi.org/10.1145/3377930.3390238Node-Depth Based Encoding is a representation for Evolutionary Algorithms applied to problems modelled by trees, storing nodes and their respective depths in an appropriately ordered list. This representation was highlighted by the results obtained, ...
- research-articleJune 2020
A study on graph representations for genetic programming
GECCO '20: Proceedings of the 2020 Genetic and Evolutionary Computation ConferencePages 931–939https://doi.org/10.1145/3377930.3390234Graph representations promise several desirable properties for Genetic Programming (GP); multiple-output programs, natural representations of code reuse and, in many cases, an innate mechanism for neutral drift. Each graph GP technique provides a ...
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- research-articleJune 2020
Genetic algorithm for the weight maximization problem on weighted automata
GECCO '20: Proceedings of the 2020 Genetic and Evolutionary Computation ConferencePages 699–707https://doi.org/10.1145/3377930.3390227The weight maximization problem (WMP) is the problem of finding the word of highest weight on a weighted finite state automaton (WFA). It is an essential question that emerges in many optimization problems in automata theory. Unfortunately, the general ...
- research-articleJune 2020
GeneCAI: genetic evolution for acquiring compact AI
GECCO '20: Proceedings of the 2020 Genetic and Evolutionary Computation ConferencePages 350–358https://doi.org/10.1145/3377930.3390226In the contemporary big data realm, Deep Neural Networks (DNNs) are evolving towards more complex architectures to achieve higher inference accuracy. Model compression techniques can be leveraged to efficiently deploy these compute-intensive ...
- research-articleJune 2020
A deep learning approach to predicting solutions in streaming optimisation domains
GECCO '20: Proceedings of the 2020 Genetic and Evolutionary Computation ConferencePages 157–165https://doi.org/10.1145/3377930.3390224In the field of combinatorial optimisation, per-instance algorithm selection still remains a challenging problem, particularly with respect to streaming problems such as packing or scheduling. Typical approaches involve training a model to predict the ...
- research-articleJune 2020
Analysis of the performance of algorithm configurators for search heuristics with global mutation operators
GECCO '20: Proceedings of the 2020 Genetic and Evolutionary Computation ConferencePages 823–831https://doi.org/10.1145/3377930.3390218Recently it has been proved that a simple algorithm configurator called ParamRLS can efficiently identify the optimal neighbourhood size to be used by stochastic local search to optimise two standard benchmark problem classes. In this paper we analyse ...
- research-articleJune 2020
Program synthesis as latent continuous optimization: evolutionary search in neural embeddings
GECCO '20: Proceedings of the 2020 Genetic and Evolutionary Computation ConferencePages 359–367https://doi.org/10.1145/3377930.3390213In optimization and machine learning, the divide between discrete and continuous problems and methods is deep and persistent. We attempt to remove this distinction by training neural network autoencoders that embed discrete candidate solutions in ...
- research-articleJune 2020
A tight lower bound on the expected runtime of standard steady state genetic algorithms
GECCO '20: Proceedings of the 2020 Genetic and Evolutionary Computation ConferencePages 1323–1331https://doi.org/10.1145/3377930.3390212Recent progress in the runtime analysis of evolutionary algorithms (EAs) has allowed the derivation of upper bounds on the expected runtime of standard steady-state GAs. These upper bounds have shown speed-ups of the GAs using crossover and mutation ...
- research-articleJune 2020
A biased random key genetic algorithm applied to the VRPTW with skill requirements and synchronization constraints
GECCO '20: Proceedings of the 2020 Genetic and Evolutionary Computation ConferencePages 717–724https://doi.org/10.1145/3377930.3390209We applied a Biased Random Key Genetic Algorithm (BRKGA) to solve the Vehicle Routing Problem with Time Windows and Synchronization Constraints. Additionally, both vehicles and clients are skilled, and each client can require up to two distinct skills ...
- research-articleJune 2020
Synthesis through unification genetic programming
GECCO '20: Proceedings of the 2020 Genetic and Evolutionary Computation ConferencePages 1029–1036https://doi.org/10.1145/3377930.3390208We present a new method, Synthesis through Unification Genetic Programming (STUN GP), which synthesizes provably correct programs using a Divide and Conquer approach. This method first splits the input space by undergoing a discovery phase that uses ...
- research-articleJune 2020
Adaptive augmented evolutionary intelligence for the design of water distribution networks
GECCO '20: Proceedings of the 2020 Genetic and Evolutionary Computation ConferencePages 1116–1124https://doi.org/10.1145/3377930.3390204The application of Evolutionary Algorithms (EAs) to real-world problems comes with inherent challenges, primarily the difficulty in defining the large number of considerations needed when designing complex systems such as Water Distribution Networks (...
- research-articleJune 2020
Designing parallelism in surrogate-assisted multiobjective optimization based on decomposition
GECCO '20: Proceedings of the 2020 Genetic and Evolutionary Computation ConferencePages 462–470https://doi.org/10.1145/3377930.3390202On the one hand, surrogate-assisted evolutionary algorithms are established as a method of choice for expensive black-box optimization problems. On the other hand, the growth in computing facilities has seen a massive increase in potential computational ...
- research-articleJune 2020
An approach to assess swarm intelligence algorithms based on complex networks
GECCO '20: Proceedings of the 2020 Genetic and Evolutionary Computation ConferencePages 31–39https://doi.org/10.1145/3377930.3390201The growing number of novel swarm-based meta-heuristics has been raising debates regarding their novelty. These algorithms often claim to be inspired by different concepts from nature but the proponents of these seldom demonstrate whether the novelty ...
- research-articleJune 2020
On the choice of the parameter control mechanism in the (1+(λ, λ)) genetic algorithm
GECCO '20: Proceedings of the 2020 Genetic and Evolutionary Computation ConferencePages 832–840https://doi.org/10.1145/3377930.3390200The self-adjusting (1 + (λ, λ)) GA is the best known genetic algorithm for problems with a good fitness-distance correlation as in OneMax. It uses a parameter control mechanism for the parameter λ that governs the mutation strength and the number of ...
- research-articleJune 2020
Variable reduction for surrogate-based optimization
GECCO '20: Proceedings of the 2020 Genetic and Evolutionary Computation ConferencePages 1177–1185https://doi.org/10.1145/3377930.3390195Real-world problems such as computational fluid dynamics simulations and finite element analyses are computationally expensive. A standard approach to mitigating the high computational expense is Surrogate-Based Optimization (SBO). Yet, due to the high-...
- research-articleJune 2020
Improving neuroevolutionary transfer learning of deep recurrent neural networks through network-aware adaptation
GECCO '20: Proceedings of the 2020 Genetic and Evolutionary Computation ConferencePages 315–323https://doi.org/10.1145/3377930.3390193Transfer learning entails taking an artificial neural network (ANN) that is trained on a source dataset and adapting it to a new target dataset. While this has been shown to be quite powerful, its use has generally been restricted by architectural ...
- research-articleJune 2020
Segmented initialization and offspring modification in evolutionary algorithms for bi-objective feature selection
GECCO '20: Proceedings of the 2020 Genetic and Evolutionary Computation ConferencePages 444–452https://doi.org/10.1145/3377930.3390192In classification, feature selection mainly aims at reducing the dataset dimensionality and increasing the classification accuracy, which also results in higher computational efficiency than using the original full set of features. Population-based meta-...