The Experts below are selected from a list of 36 Experts worldwide ranked by ideXlab platform
Jonathan Page - One of the best experts on this subject based on the ideXlab platform.
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Solving High-Order Boolean Parity Problems with Smooth Uniform Crossover, Sub-Machine Code GP and Demes
Genetic Programming and Evolvable Machines, 2000Co-Authors: Riccardo Poli, Jonathan PageAbstract:We propose and study new search operators and a novel node representation that can make GP fitness landscapes smoother. Together with a tree evaluation method known as Sub-machine-code GP and the use of demes, these make up a recipe for solving very large parity problems using GP. We tested this recipe on parity problems with up to 22 input variables, solving them with a very high success probability.
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Smooth uniform Crossover, Sub-machine code GP and demes: a recipe for solving high-order Boolean parity problems
1999Co-Authors: Riccardo Poli, Jonathan Page, William B. LangdonAbstract:We describe a recipe to solve very large parity problems using GP. The recipe includes: smooth uniform Crossover (a Crossover operator inspired by our theoretical research), Sub-machine-code GP (a technique to speed up fitness evaluation in Boolean classification problems), and interacting demes (Sub-populations) running on separate workstations. We tested this recipe on parity problems with up to 22 input variables, solving them with a very high success probability.
Riccardo Poli - One of the best experts on this subject based on the ideXlab platform.
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Solving High-Order Boolean Parity Problems with Smooth Uniform Crossover, Sub-Machine Code GP and Demes
Genetic Programming and Evolvable Machines, 2000Co-Authors: Riccardo Poli, Jonathan PageAbstract:We propose and study new search operators and a novel node representation that can make GP fitness landscapes smoother. Together with a tree evaluation method known as Sub-machine-code GP and the use of demes, these make up a recipe for solving very large parity problems using GP. We tested this recipe on parity problems with up to 22 input variables, solving them with a very high success probability.
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Smooth uniform Crossover, Sub-machine code GP and demes: a recipe for solving high-order Boolean parity problems
1999Co-Authors: Riccardo Poli, Jonathan Page, William B. LangdonAbstract:We describe a recipe to solve very large parity problems using GP. The recipe includes: smooth uniform Crossover (a Crossover operator inspired by our theoretical research), Sub-machine-code GP (a technique to speed up fitness evaluation in Boolean classification problems), and interacting demes (Sub-populations) running on separate workstations. We tested this recipe on parity problems with up to 22 input variables, solving them with a very high success probability.
William B. Langdon - One of the best experts on this subject based on the ideXlab platform.
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Smooth uniform Crossover, Sub-machine code GP and demes: a recipe for solving high-order Boolean parity problems
1999Co-Authors: Riccardo Poli, Jonathan Page, William B. LangdonAbstract:We describe a recipe to solve very large parity problems using GP. The recipe includes: smooth uniform Crossover (a Crossover operator inspired by our theoretical research), Sub-machine-code GP (a technique to speed up fitness evaluation in Boolean classification problems), and interacting demes (Sub-populations) running on separate workstations. We tested this recipe on parity problems with up to 22 input variables, solving them with a very high success probability.
Adam Dalton - One of the best experts on this subject based on the ideXlab platform.
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The Sub-genres of fantasy literature : where does 'metaphysical fantasy', as exemplified by A.J. Dalton's novel 'Empire of the Saviours', sit in relation to traditional 'high fantasy' and other second-world Sub-genres of fantasy literature?
2018Co-Authors: Adam DaltonAbstract:Drawing upon academic and critical literature, the introduction to this exegesis considers how J.R.R. Tolkien’s The Lord of the Rings (1954) became the ‘norm’ in modern second-world fantasy. Just as Tolkien’s ‘high fantasy’ mediated the fantasies of the sociohistorical periods that preceded it (James, 2012), so Subsequent fantasy authors and Sub-genres have inherited from and had to react against ‘high fantasy’ in order to discover their own definitions and distinct voices, styles and relevance. Thus, the introduction argues, in order to define and demonstrate the distinct nature of second-world ‘metaphysical fantasy’, of which Empire of the Saviours (2011) is a defining novel, this exegesis is required to show how the second-world ‘epic fantasy’ of the 1980s and 90s inherited from and reacted against ‘high fantasy’, and how ‘metaphysical fantasy’ in turned inherited from and reacted against the ‘epic fantasy’ Sub-genre. There is also a discussion of how competing Sub-genre definitions within academia and the publishing industry have complicated the debate. The first chapter considers the sociohistorical context of the development of the various Sub-genres of fantasy literature, moving from the ‘high fantasy’ of Tolkien’s The Lord of the Rings, through the nature-based fantasy of the 1960s, to the ‘swords and planets’ sci-fi Crossover Sub-genre of the 1970s, to the ‘epic fantasy’ of the 1980s and 90s, to the ‘urban fantasy’, ‘flintlock fantasy’, ‘steampunk’ and ‘comedic fantasy’ of the new millennium, to the ‘dark fantasy’ and ‘metaphysical fantasy’ (the latter established by my various novels) of the mid to late 2000s, to the ‘grimdark fantasy’ and ‘dystopian YA’ of the 2010s. The chapter shows how each Sub-genre is informed by and reacts to its own sociohistorical moment and that each Sub-genre in large part derives its distinctiveness from that unique moment. The second chapter considers how second-world ‘metaphysical fantasy’ in large part derives its definition and particular motifs from a ‘Millennial’ sociohistorical moment. The chapter then analyses how ‘metaphysical fantasy’ is distinctly informed by, reacts to and differs from the preceding Sub-genre of second-world ‘epic fantasy’. Finally, the chapter considers how Subsequent second-world ‘grimdark fantasy’ is informed by, reacts to and differs from ‘metaphysical fantasy’. The third chapter sets out how my novel Empire of the Saviours further exemplifies ‘metaphysical fantasy’ and has served to establish the Sub-genre as a distinct and valuable contribution to the wider genre of fantasy. Drawing upon Empire of the Saviours, the chapter identifies further literary features and themes (other than those detailed in the second chapter) that are unique to the ‘metaphysical fantasy’ Sub-genre.
Fang Jun-an - One of the best experts on this subject based on the ideXlab platform.
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The Choice of Turbulence Models in Numerical Simulation of Secondary Flow in Bypass Crossover Sub of Horizontal Wells
Science Technology and Engineering, 2009Co-Authors: Fang Jun-anAbstract:Numerical calculations are performed by three different turbulence models(i.e.standard k-e model,RNG k-e model and RSM model) to simulate the secondary flow in the bypass Crossover Sub of the horizontal wells.The numerical simulation results are analyzed and compared with the experiment results.It is shown that the results based on the RSM model agree well with the experiment results and the flow characteristic of the secondary flow in bypass Crossover Sub of horizontal wells.