{"id":132166,"date":"2018-01-25T08:46:20","date_gmt":"2018-01-25T08:46:20","guid":{"rendered":"https:\/\/\/la-synapse-artificielle-du-mit-premiere-etape-vers-un-cerveau-artificiel\/"},"modified":"2018-01-25T08:46:20","modified_gmt":"2018-01-25T08:46:20","slug":"la-synapse-artificielle-du-mit-premiere-etape-vers-un-cerveau-artificiel","status":"publish","type":"post","link":"https:\/\/www.ecinews.fr\/fr\/la-synapse-artificielle-du-mit-premiere-etape-vers-un-cerveau-artificiel\/","title":{"rendered":"La synapse artificielle du MIT premi\u00e8re \u00e9tape vers un cerveau artificiel?"},"content":{"rendered":"<p><span id=\"result_box\" lang=\"fr\"><span title=\"The team has built a small chip with artificial synapses using silicon germanium.\">L&rsquo;\u00e9quipe a construit une petite puce avec des synapses artificielles en utilisant du silicium-germanium. <\/span><span title=\"In simulations, the researchers found that the chip and its synapses could be used to recognize samples of handwriting, with 95 percent accuracy.\n\n\">Dans des simulations, les chercheurs ont d\u00e9couvert que la puce et ses synapses pouvaient \u00eatre utilis\u00e9es pour reconna\u00eetre des \u00e9chantillons d&rsquo;\u00e9criture, avec une pr\u00e9cision de 95%.<\/span><br \/>\n<span title=\"Most neuromorphic chip designs attempt to emulate the synaptic connection between neurons using two conductive layers separated by a switching medium.\">La plupart des conceptions de puces neuromorphiques tentent d&rsquo;\u00e9muler la connexion synaptique entre les neurones en utilisant deux couches conductrices s\u00e9par\u00e9es par un milieu de commutation. <\/span><span title=\"When a voltage is applied, ions move in the switching medium to create conductive filaments, similarly to how the weight of a synapse changes.\n\n\">Lorsqu&rsquo;une tension est appliqu\u00e9e, les ions se d\u00e9placent dans le milieu de commutation pour cr\u00e9er des filaments conducteurs, de la m\u00eame mani\u00e8re que le poids d&rsquo;une synapse change.<\/span><\/span><\/p>\n<p><span id=\"result_box\" lang=\"fr\"><span title=\"In this architecture is it difficult to control the flow of ions in existing designs as there are many possible paths.\">Dans cette architecture, il est difficile de contr\u00f4ler le flux d&rsquo;ions dans les conceptions existantes car il existe de nombreux chemins possibles. <\/span><span title=\"\u201cOnce you apply some voltage to represent some data with your artificial neuron, you have to erase and be able to write it again in the exact same way,\u201d said Jeehwan Kim, asst professor in the departments of Mechanical Engineering and Materials Science and Engineering\">\u00ab\u00a0Une fois que vous appliquez une certaine tension pour repr\u00e9senter certaines donn\u00e9es avec votre neurone artificiel, vous devez effacer et \u00eatre capable de le r\u00e9-\u00e9crire exactement de la m\u00eame mani\u00e8re\u00a0\u00bb, a d\u00e9clar\u00e9 Jeehwan Kim, professeur aux d\u00e9partements de g\u00e9nie m\u00e9canique et science des mat\u00e9riaux. <\/span><span title=\", and a principal investigator in MIT's Research Laboratory of Electronics and Microsystems Technology Laboratories.\">et chercheur principal au Laboratoire de recherche du MIT de technologie de l&rsquo;\u00e9lectronique et des microsyst\u00e8mes. <\/span><span title=\"\u201cBut in an amorphous solid, when you write again, the ions go in different directions because there are lots of defects,\u201d he said.\">\u00ab\u00a0Mais dans un solide amorphe, quand vous r\u00e9-\u00e9crivez, les ions vont dans des directions diff\u00e9rentes \u00e0 cause de nombreux d\u00e9fauts dans la structure\u00a0\u00bb, a-t-il dit. <\/span><span title=\"\u201cThis stream is changing, and it\u2019s hard to control.\">\u00ab\u00a0Ce flux changer, et c&rsquo;est difficile \u00e0 contr\u00f4ler. <\/span><span title=\"That\u2019s the biggest problem \u2014 nonuniformity of the artificial synapse.\u201d\n\n\">C&rsquo;est le plus gros probl\u00e8me: la non-uniformit\u00e9 de la synapse artificielle. \u00ab\u00a0<\/span><\/span><\/p>\n<p><span id=\"result_box\" lang=\"fr\"><span title=\"Instead of using amorphous materials as an artificial synapse, Kim and his colleagues used single-crystal silicon and created a precise, one-dimensional line defect, or dislocation, through the silicon, through which ions could predictably flow.\n\n\">Au lieu d&rsquo;utiliser des mat\u00e9riaux amorphes comme synapse artificielle, Kim et ses coll\u00e8gues ont utilis\u00e9 du silicium monocristallin et on cr\u00e9\u00e9 une ligne de unidimensionnelle pr\u00e9cise, ou une dislocation, \u00e0 travers le silicium, \u00e0 travers lequel les ions peuvent circuler de mani\u00e8re pr\u00e9visible.<\/span><\/span><br \/>\n&nbsp;<\/p>\n<p><span lang=\"fr\"><span title=\"The team then grew a lattice of silicon germanium on top of the silicon wafer.\">L&rsquo;\u00e9quipe a ensuite fait cro\u00eetre un treillis de silicium germanium sur le dessus de la plaquette de silicium. <\/span><span title=\"Silicon germanium\u2019s lattice is slightly larger than that of silicon, and Kim found that together, the two perfectly mismatched materials can form a funnel-like dislocation, creating a single path through which ions can flow.\n\n\">Le r\u00e9seau du silicium-germanium est l\u00e9g\u00e8rement plus grand que celui du silicium, et Kim a d\u00e9couvert que, ensemble, les deux mat\u00e9riaux&nbsp; peuvent former une dislocation en forme d&rsquo;entonnoir, cr\u00e9ant un seul chemin \u00e0 travers lequel les ions peuvent circuler.<\/span><\/span><br \/>\n<span id=\"result_box\" lang=\"fr\"><span title=\"The neuromorphic chip consists of artificial synapses made from silicon germanium (SiGe), each around 25nm in size.\">La puce neuromorphique est constitu\u00e9e de synapses artificielles en silicium germanium (SiGe), chacune d&rsquo;une taille d&rsquo;environ 25 nm. <\/span><span title=\"The team applied voltage to each synapse and found that all synapses exhibited more or less the same current, or flow of ions, with about a 4 percent variation between synapses \u2014 a much more uniform performance compared with synapses made from amorphous material.\n\n\">L&rsquo;\u00e9quipe a appliqu\u00e9 une tension \u00e0 chaque synapse et a constat\u00e9 que toutes les synapses pr\u00e9sentaient plus ou moins le m\u00eame courant, ou flux d&rsquo;ions, avec une variation d&rsquo;environ 4% entre les synapses &#8211; une performance beaucoup plus uniforme par rapport aux synapses faites de mat\u00e9riaux amorphes.<\/span><\/p>\n<p><span title=\"They also tested a single synapse over multiple trials, applying the same voltage over 700 cycles, and found the synapse exhibited the same current, with just 1 percent variation from cycle to cycle.\">Ils ont \u00e9galement test\u00e9 une synapse unique sur plusieurs essais, en appliquant la m\u00eame tension sur 700 cycles, et ont trouv\u00e9 que la synapse pr\u00e9sentait le m\u00eame courant, avec seulement 1% de variation d&rsquo;un cycle \u00e0 l&rsquo;autre. <\/span><span title=\"\u201cThis is the most uniform device we could achieve, which is the key to demonstrating artificial neural networks,\u201d said Kim.\n\n\">\u00ab\u00a0C&rsquo;est le dispositif le plus uniforme que nous puissions atteindre, qui est la cl\u00e9 pour d\u00e9montrer les r\u00e9seaux neuronaux artificiels\u00a0\u00bb, a d\u00e9clar\u00e9 Kim.<\/span><\/span><br \/>\n&nbsp;<\/p>\n<hr \/>\n<p><span id=\"result_box\" lang=\"fr\"><span title=\"As a final test, Kim\u2019s team explored how its device would perform if it were to carry out actual learning tasks such as recognizing samples of handwriting.\">En tant que test final, l&rsquo;\u00e9quipe de Kim a explor\u00e9 comment son dispositif fonctionnerait s&rsquo;il devait effectuer des t\u00e2ches d&rsquo;apprentissage r\u00e9elles telles que la reconnaissance d&rsquo;\u00e9chantillons d&rsquo;\u00e9criture manuscrite. <\/span><span title=\"The team ran a computer simulation of an artificial neural network consisting of three sheets of neural layers connected via two layers of artificial synapses with the properties of the actual neuromorphic chip.\">L&rsquo;\u00e9quipe a ex\u00e9cut\u00e9 une simulation informatique d&rsquo;un r\u00e9seau neuronal artificiel compos\u00e9 de trois couches neurales reli\u00e9es par deux couches de synapses artificielles avec les propri\u00e9t\u00e9s de la puce neuromorphique r\u00e9elle. <\/span><span title=\"They fed into their simulation tens of thousands of samples from a handwritten recognition dataset commonly used by neuromorphic designers, and found that their neural network hardware recognized handwritten samples 95 percent of the time, compared to the 97 percent accuracy of existing software algorithms.\n\n\">Ils ont introduit dans leur simulation des dizaines de milliers d&rsquo;\u00e9chantillons \u00e0 partir d&rsquo;un ensemble de donn\u00e9es de reconnaissance manuscrites couramment utilis\u00e9es par les concepteurs neuromorphes, et ont trouv\u00e9 que leur mat\u00e9riel de r\u00e9seau neuronal reconnaissait des \u00e9chantillons manuscrits 95% du temps compar\u00e9 \u00e0 un r\u00e9sultat de 97% pour les algorythmes existants.<\/span><\/span><\/p>\n<p><span id=\"result_box\" lang=\"fr\"><span title=\"The team is in the process of building a working neuromorphic chip that can carry out handwriting-recognition tasks.\">L&rsquo;\u00e9quipe est en train de construire une puce neuromorphique fonctionnelle capable de r\u00e9aliser des t\u00e2ches de reconnaissance d&rsquo;\u00e9criture manuscrite. <\/span><span title=\"Beyond handwriting, the artificial synapse design will enable much smaller, portable neural network devices that can perform complex computations that currently are only possible with large supercomputers.\n\n\">Au-del\u00e0 de l&rsquo;\u00e9criture manuscrite, la conception \u00e0 base de synapses artificielles va permettre de cr\u00e9er des dispositifs de r\u00e9seaux neuronaux portables beaucoup plus petits capables de r\u00e9aliser des calculs complexes qui ne sont actuellement possibles qu&rsquo;avec de grands supercalculateurs.<\/span><\/p>\n<p><span title=\"\u201cUltimately we want a chip as big as a fingernail to replace one big supercomputer,\u201d said Kim.\">\u00ab\u00a0En fin de compte, nous voulons cr\u00e9er une puce de la taille d&rsquo;un ongle pour remplacer un grand supercalculateur\u00a0\u00bb, a d\u00e9clar\u00e9 Kim. <\/span><span title=\"\u201cThis opens a stepping stone to produce real artificial hardware.\u201d\">\u00ab\u00a0Cela ouvre un tremplin pour produire du vrai hardware artificiel.\u00a0\u00bb<\/span><\/span><\/p>\n<p><a href=\"http:\/\/www.mit.edu\">www.mit.edu<\/a><\/p>\n<p><strong>La R\u00e9daction vous conseille aussi:<\/strong><\/p>\n<p><a href=\"http:\/\/www.electronique-eci.com\/news\/accelerer-lintelligence-artificielle-avec-la-nouvelle-puce-autoapprentissage-intel\"><strong>Acc\u00e9l\u00e9rer l\u2019intelligence artificielle avec la nouvelle puce \u00e0 autoapprentissage Intel<\/strong><\/a><\/p>\n<p><a href=\"http:\/\/www.electronique-eci.com\/news\/facebook-investit-dans-station-f-pour-promouvoir-lia\">Facebook investit dans Station F pour promouvoir l&rsquo;IA<\/a><\/p>\n<p><strong>Related stories in English:<\/strong><\/p>\n<ul>\n<li><a href=\"http:\/\/www.eenewspower.com\/news\/transistors-cannot-enable-very-low-power-iot-could-memristors-do-job\">TRANSISTORS CANNOT ENABLE VERY LOW-POWER IOT, COULD MEMRISTORS DO THE JOB?<\/a><\/li>\n<li><a href=\"http:\/\/www.electronics-eetimes.com\/news\/ibm-unveils-cognitive-computing-chips-mimic-brain-cells\">IBM UNVEILS COGNITIVE COMPUTING CHIPS THAT MIMIC BRAIN CELLS<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Des chercheurs du MIT aux \u00c9tats-Unis ont con\u00e7u une synapse artificielle dont on peut contr\u00f4ler avec pr\u00e9cision la force d&rsquo;un courant \u00e9lectrique qui la traverse, de la m\u00eame mani\u00e8re que les ions circulent entre les neurones. La conception est une \u00e9tape majeure vers la construction de puces neuromorphiques portables de faible puissance utilis\u00e9es pour la reconnaissance de formes.<\/p>\n","protected":false},"author":22,"featured_media":132167,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[883],"tags":[913,890],"domains":[47],"ppma_author":[1149],"class_list":["post-132166","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technologies","tag-materials-processes-fr","tag-powermanagement-fr","domains-electronique-eci"],"acf":[],"yoast_head":"<title>La synapse artificielle du MIT premi\u00e8re \u00e9tape vers un cerveau...<\/title>\n<meta name=\"description\" content=\"Des chercheurs du MIT aux \u00c9tats-Unis ont con\u00e7u une synapse artificielle dont on peut contr\u00f4ler avec pr\u00e9cision la force d&#039;un courant \u00e9lectrique qui la...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.ecinews.fr\/fr\/wp-json\/wp\/v2\/posts\/132166\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"La synapse artificielle du MIT premi\u00e8re \u00e9tape vers un cerveau artificiel?\" \/>\n<meta property=\"og:description\" content=\"Des chercheurs du MIT aux \u00c9tats-Unis ont con\u00e7u une synapse artificielle dont on peut contr\u00f4ler avec pr\u00e9cision la force d&#039;un courant \u00e9lectrique qui la traverse, de la m\u00eame mani\u00e8re que les ions circulent entre les neurones. 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