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{1530} |
ref: -2017
tags: deep neuroevolution jeff clune Uber genetic algorithms
date: 02-18-2021 18:27 gmt
revision:1
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Deep Neuroevolution: genetic algorithms are a competitive alternative for training deep neural networks for reinforcement learning* Uber AI labs; Jeff Clune.
The result is indeed surprising, but it also feels lazy -- the total effort or information that they put into writing the actual algorithm is small; as mentioned in the introduction, this is a case of old algorithms with modern levels of compute. Analogously, compare Go-Explore, also by Uber AI labs, vs Agent57 by DeepMind; the Agent57 paper blithely dismisses the otherwise breathless Go-Explore result as feature engineering and unrealistic free backtracking / game-resetting (which is true..) It's strange that they did not incorporate crossover aka recombination, as David MacKay clearly shows that recombination allows for much higher mutation rates and much better transmission of information through a population. (Chapter 'Why have sex'). They also perhaps more reasonably omit developmental encoding, where network weights are tied or controlled through development, again in an analogy to biology. A better solution, as they point out, would be some sort of hybrid GA / ES / A3C system which used both gradient-based tuning, random stochastic gradient-based exploration, and straight genetic optimization, possibly all in parallel, with global selection as the umbrella. They mention this, but to my current knowledge this has not been done. | ||||
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PMID-4708761 Design, Fabrication, and In Vivo Behavior of Chronic Recording Intracortical Microelectrodes
____References____ Salcman, Michael and Bak, Martin J. Design, Fabrication, and In Vivo Behavior of Chronic Recording Intracortical Microelectrodes Biomedical Engineering, IEEE Transactions on BME-20 4 253 -260 (1973) | ||||
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PMID-27705958 Chronic in vivo stability assessment of carbon fiber microelectrode arrays.
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PMID-28084398 Highly Stable Glassy Carbon Interfaces for Long-Term Neural Stimulation and Low-Noise Recording of Brain Activity
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Various microelectrode patents:
Microelectronics:
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ref: -0
tags: Anna Roe optogenetics artificial dura monkeys intrinisic imaging
date: 09-30-2013 19:08 gmt
revision:3
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PMID-23761700 Optogenetics through windows on the brain in nonhuman primates
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PMID-19963267 Quantitative analysis of the tissue response to chronically implanted microwire electrodes in rat cortex.
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IEEE-4065599 (pdf) Comments on Microelectrodes
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PMID-20577628[0] Seven years of recording from monkey cortex with a chronically implanted multiple electrode.
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PMID-1256090[0] A new chronic recording intracortical microelectrode
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PMID-19486899[0] Toward a comparison of microelectrodes for acute and chronic recordings.
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PMID-21654037[0] In vivo deployment of mechanically adaptive nanocomposites for intracortical microelectrodes
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PMID-16045910[0] Neuronal cell loss accompanies the brain tissue response to chronically implanted silicon microelectrode arrays.
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ref: COLLIAS-1957.05
tags: histology microelectrode vasulature
date: 01-23-2013 23:56 gmt
revision:4
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PMID-13429398[0] Histopathological changes produced by implanted electrodes in cat brains; comparison with histopathological changes in human and experimental puncture wounds.
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ref: -0
tags: microelectrode array flexible PDMS via interconnect Georgia
date: 01-04-2013 00:33 gmt
revision:0
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IEEE-6197244 (pdf) A PDMS-Based Integrated Stretchable Microelectrode Array (isMEA) for Neural and Muscular Surface Interfacing | ||||
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ref: -0
tags: active filter design Netherlands Gerrit Groenewold
date: 02-17-2012 20:27 gmt
revision:0
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IEEE-04268406 (pdf) Noise and Group Delay in Actvie Filters
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http://infinite-interface.net/ -- a neuroscientist at University of Southern California. Many thoughtful, informative posts. | ||||
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IEEE-4120642 (pdf) Mechanical Factors in the Design of Chronic Recording Intracortical Microelectrodes ____References____ Goldstein, Seth R. and Salcman, Michael Mechanical Factors in the Design of Chronic Recording Intracortical Microelectrodes Biomedical Engineering, IEEE Transactions on BME-20 4 260 -269 (1973) | ||||
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ref: GULD-1964.07
tags: platinum iridium microelectrode eltrolytic etching original
date: 01-03-2012 19:05 gmt
revision:2
[1] [0] [head]
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PMID-14199966[0] A Glass-covered platinum microelectrode
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ref: bookmark-0
tags: teflon PTFE bonding metal polytetrafluoroethylene tetraflouroethylene
date: 0-0-2006 0:0
revision:0
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http://pslc.ws/mactest/ptfeidea.htm block copolymer: http://en.wikipedia.org/wiki/Copolymer |