{"id":56370,"date":"2020-02-11T00:00:00","date_gmt":"2020-02-10T21:00:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/kak-energetik-izuchal-nejroseti-i-obzor-na-besplatnyj-kurs-udacity-intro-to-tensorflow-for-deep-learning"},"modified":"2020-02-18T14:04:38","modified_gmt":"2020-02-18T11:04:38","slug":"kak-energetik-izuchal-nejroseti-i-obzor-na-besplatnyj-kurs-udacity-intro-to-tensorflow-for-deep-learning","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/news\/kak-energetik-izuchal-nejroseti-i-obzor-na-besplatnyj-kurs-udacity-intro-to-tensorflow-for-deep-learning","title":{"rendered":"Kuidas elektrik \u00f5ppis neurov\u00f5rke ja \u00fclevaade tasuta kursusest \"Udacity: Sissejuhatus TensorFlow'sse s\u00fcva\u00f5ppimiseks\"","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Kogu oma teadliku elu olen ma olnud elektrik (ei, praegu ei r\u00e4\u00e4gi ma kaheldavate omadustega joogist). <\/p>\n<p>Ma ei ole kunagi eriti ustavalt huvitatud olnud infotehnoloogia maailmast ja isegi maatriksite korrutamine on mulle pigem v\u00f5\u00f5ras. Ja mul polnud seda kunagi vaja, et anda teile \u00fclevaade minu t\u00f6\u00f6 spetsiifikast, jagan ma \u00fche suurep\u00e4rase loo. Kord palusin ma oma kolleegidel teha Excelis t\u00f6\u00f6d \u2013 tabelit, pool t\u00f6\u00f6p\u00e4eva m\u00f6\u00f6dus ja ma l\u00e4hen nende juurde, ja nad istuvad ja summeerivad andmeid kalkulaatoriga, jah, jah, tavalise musta kalkulaatoriga, kus on nupud. Nii et millest me siis r\u00e4\u00e4gime, kui teema on aga neuronv\u00f5rgud?.. Seega ei olnud mul kunagi erilisi eelduseid IT maailma sukeldumiseks. Kuid nagu \u00f6eldakse, \"kus meid pole, seal on h\u00e4sti\", mu s\u00f5brad r\u00e4\u00e4kisid mulle pidevalt lisarealoo, neuronv\u00f5rkude ja programmeerimiskeelte (peamiselt Python) kohta.<\/p>\n<p>Kasutuselt n\u00e4gi see s\u00f5nades \u00fcsna lihtne v\u00e4lja, ja ma m\u00f5tlesin, miks mitte omandada see maagiline kunst, et rakendada seda oma tegevusvaldkonnas.<\/p>\n<p>Selles artiklis j\u00e4tn ma k\u00f5rvale oma katsed \u00f5ppida Pythonit ja jagan teiega oma muljeid Udacity tasuta TensorFlow kursusest.<\/p>\n<p><img decoding=\"async\" alt=\"Kuidas elektrik \u00f5ppis neurov\u00f5rke ja \u00fclevaade tasuta kursusest &quot;Udacity: Sissejuhatus TensorFlow&#039;sse s\u00fcva\u00f5ppimiseks&quot;\" src=\"\/wp-content\/uploads\/2020\/02\/d8955ee8fd84fe551521a7675f425073.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<h2> Sissejuhatus<\/h2>\n<p>\nEsiteks tasub m\u00e4rkida, et p\u00e4rast 11 aastat elektrit\u00f6\u00f6stuses, kui sa tead ja saad teha k\u00f5ike, isegi natuke rohkem (oma kohustuste raames), \u00f5ppimine t\u00e4iesti uute asjade juurde \u2013 \u00fchelt poolt tekitab see suurt entusiashmi, kuid teisalt \u2013 osutub see f\u00fc\u00fcsiliseks valuks \"hammaste peas\".<\/p>\n<p>Ma ei m\u00f5ista siiani t\u00e4ielikult k\u00f5iki programmeerimise ja masin\u00f5ppe p\u00f5hikontseptsioone, seega ei tohiks mind rangelt hukka m\u00f5ista. Loodan, et minu artikkel on huvitav ja kasulik sellistele inimestele nagu mina \u2013 kaugelt tarkvaraarendusest.<\/p>\n<p>Enne kui liigun kursuse \u00fclevaate juurde, \u00fctlen, et selle \u00f5ppimiseks on vajalik v\u00e4hemalt minimaalne Python'i teadlikkus. V\u00f5ib lugeda paar raamatut algajatele (ma hakkasin veel Stepic'is kursust l\u00e4bima, kuid ei ole seda veel l\u00f5puni \u00f5ppinud). <\/p>\n<p>TensorFlow kursuses ei tule keerulisi struktuure, kuid on vajalik m\u00f5ista, miks raamatukogud imporditakse, kuidas m\u00e4\u00e4ratletakse funktsioon ja miks sellele midagi antakse.<\/p>\n<h2> Miks TensorFlow ja Udacity? <\/h2>\n<p>\nMinu \u00f5ppe peamine eesm\u00e4rk oli \u00f5ppida tuvastama elektriseadmete elementide fotosid n\u00e4rviv\u00f5rkude abil. <\/p>\n<p>Valisin TensorFlow, kuna olin sellest oma s\u00f5pradelt kuulnud. Ja nagu ma aru sain, on see kursus piisavalt populaarne.<\/p>\n<p>P\u00fc\u00fcdsin alustada ametlikust <noindex><a rel=\"nofollow\" href=\"https:\/\/www.tensorflow.org\/tutorials\"> juhendist <\/a><\/noindex>.<\/p>\n<p>Ja seisime silmitsi kahe probleemiga.<\/p>\n<ul>\n<li>\u00d5ppematerjale on palju ja need on segamini. Koostada v\u00e4hemalt m\u00f5ningane terviklik pilt piltide tuvastamise \u00fclesande lahendamisest oli mulle v\u00e4ga raske. <\/li>\n<li>Enamik minu vajalikest artiklitest ei ole vene keelde t\u00f5lgitud. Nii on juhtunud, et lapsena \u00f5ppisin saksa keelt ja n\u00fc\u00fcd, nagu paljud n\u00f5ukogude lapsed, ei oska ma ei saksa ega inglise keelt. Loomulikult olen ma p\u00fc\u00fcdnud oma teadlikku elu jooksul inglise keelt \u00f5ppida, kuid sain hakkama ligikaudu nii nagu pildil. <\/li>\n<\/ul>\n<p>\n<img decoding=\"async\" alt=\"Kuidas elektrik \u00f5ppis neurov\u00f5rke ja \u00fclevaade tasuta kursusest &quot;Udacity: Sissejuhatus TensorFlow&#039;sse s\u00fcva\u00f5ppimiseks&quot;\" src=\"\/wp-content\/uploads\/2020\/02\/44250d475745cf02ee7126e31f695c3b.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nKaevates edasi ametlikul veebilehel, leidsin soovituse l\u00e4bida <noindex><a rel=\"nofollow\" href=\"https:\/\/www.tensorflow.org\/resources\/learn-ml\/basics-of-machine-learning\/\"> \u00fcks kahest veebikursusest<\/a><\/noindex>.<\/p>\n<p>Kuna ma aru sain, oli Courseras kursus tasuline, kuid kursuse <noindex><a rel=\"nofollow\" href=\"https:\/\/www.udacity.com\/course\/intro-to-tensorflow-for-deep-learning--ud187\"> Udacity: Sissejuhatus TensorFlow s\u00fcgavale \u00f5ppimisele<\/a><\/noindex> v\u00f5is l\u00e4bida \"tasuta, see t\u00e4hendab kingitusena\".<\/p>\n<h2> Kursuse sisu<\/h2>\n<p>\nKursus koosneb 9 \u00f5ppetunnist. <\/p>\n<p>Esimene osa on sissejuhatav, seal r\u00e4\u00e4gitakse, milleks see \u00fcldse vajalik on.<\/p>\n<p>\u00d5ppetund nr 2 osutus minu lemmikuks. See oli piisavalt lihtne, et seda m\u00f5ista, ja samas n\u00e4itas teaduse imesid. L\u00fchidalt, selles \u00f5ppetunnis, lisaks p\u00f5hiteabele n\u00e4rviv\u00f5rkude kohta, demonstreerivad loojaid, kuidas \u00fchekihiliste n\u00e4rviv\u00f5rkude abil lahendada \u00fclesanne, milleks on temperatuuri teisendamine Fahrenheiti kraadidest Celsiuse kraadidesse.<\/p>\n<p>See on t\u00f5eliselt v\u00e4ga arusaadav n\u00e4ide. Siiani m\u00f5tlen, kuidas v\u00e4lja m\u00f5elda ja lahenda sarnane \u00fclesanne, kuid ainult elektri jaoks.<\/p>\n<p>Kahjuks j\u00e4in edasi liikuma, kuna tundmatud asjade \u00f5ppimine tundmatul keelel on \u00fcsna keeruline. Aitas see, et leidsin Habrest <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/453482\/\">kursuse t\u00f5lke vene keelde<\/a><\/noindex>.<\/p>\n<p>T\u00f5lge on tehtud kvaliteetselt, Colab'i p\u00e4evikud on samuti t\u00f5lgitud, seega piilusin edasi nii originaali kui ka t\u00f5lget.<\/p>\n<p>\u00d5ppetund nr 3 on tegelikult ametliku TensorFlow juhendi materjalide \u00fcmberpandud versioon. Selles \u00f5ppetunnis \u00f5pime koos mitmekihilise n\u00e4rviv\u00f5rguga klassifitseerima riidepildid (andmekogum Fashion MNIST).<\/p>\n<p>Tunnid number 4 kuni number 7 on samuti \u00f5petuse \u00fcmberkirjutus. Kuid kuna need on korralikult koostatud, pole vajadust iseseisvalt uurida \u00f5pistimise j\u00e4rjestust. Nendes tundides r\u00e4\u00e4gitakse meile l\u00fchidalt \u00fclipeentest n\u00e4rviv\u00f5rkudest, kuidas suurendada \u00f5ppe t\u00e4psust ja s\u00e4ilitada mudel. Samuti lahendame me samal ajal kasside ja koerte pildil klassifitseerimise \u00fclesande.<\/p>\n<p>Tund number 8 on hoopis eraldi kursus, seal on teine \u00f5petaja ja kursus on \u00fcsna mahukas. Tund on p\u00fchendatud ajas\u00fcsteemidele. Kuna see mind praegu ei huvita, vaatasin seda kiiruselt \u00fcle.<\/p>\n<p>Kursuse l\u00f5petab tund number 9, mis kutsub \u00fcles minema tasuta kursusele TensorFlow lite'i kohta.<\/p>\n<h2> Mida meeldis ja ei meeldinud<\/h2>\n<p>\nAlustan plussidest:<\/p>\n<ul>\n<li> Kursus on tasuta <\/li>\n<li> Kursus on TensorFlow 2 kohta. M\u00f5ned \u00f5pikuid, mida olen n\u00e4inud, ja m\u00f5ned kursused internetis olid TensorFlow 1 kohta. Ei tea, kui suur vahe on, aga meeldiv on \u00f5ppida ajakohast versiooni. <\/li>\n<li> Kursuse videote \u00f5petajad ei h\u00e4iri (kuigi vene versioonis loetakse mitte nii energiliselt kui originaalis) <\/li>\n<li> Kursus ei v\u00f5ta palju aega<\/li>\n<li> Kursus ei tekita masendust ja lootusetust. Kursuse \u00fclesanded on lihtsad ja alati on olemas vihje Colab'ist \u00f5ige lahenduse n\u00e4ol, kui midagi ei ole selge (aga mulle ei olnud selge hea osa \u00fclesandeid) <\/li>\n<li> \u00dchtegi installimist pole vaja, k\u00f5ik kursuse laborit\u00f6\u00f6d saab teha brauseris<\/li>\n<\/ul>\n<p>\nN\u00fc\u00fcd miinused:<\/p>\n<ul>\n<li> Praktiliselt pole kontrollmaterjale. Ei teste, ei \u00fclesandeid, mitte midagi, et kuidagi kursuse omandamist kontrollida <\/li>\n<li> Mul ei t\u00f6\u00f6tinud k\u00f5ik m\u00e4rkmikud \u00f5igesti. Minu arvates kolmandas tunnis originaalkursusest inglise keeles andis Colab vea ja ma ei teadnud, mida sellega teha <\/li>\n<li> Mugav on vaadata ainult arvutis. V\u00f5ib olla, et ma ei suutnud l\u00f5puni aru saada, aga ma ei leidnud Udacity rakendust oma nutitelefonile. Ja mobiiliversioon veebilehe ei ole adaptiivne, st peaaegu kogu ekraani ala v\u00f5tab men\u00fc\u00fc navigeerimiseks ja p\u00f5hisisu n\u00e4gemiseks tuleb libistada paremale v\u00e4lja vaatamisalast. Samuti ei saa videoid telefonis vaadata. 6-tollisel ekraanil ei n\u00e4e sa suurt midagi selgelt.<\/li>\n<li>M\u00f5ned asjad kursuses selgitatakse mitu korda, kuid t\u00f5eliselt vajalikud teemad pakkep\u00f5histe v\u00f5rkude kohta j\u00e4\u00e4vad puudulikuks. Ma ei saanud aru, mis on globaalse eesm\u00e4rgi osa harjutustes (n\u00e4iteks, milleks on vajalik Max Pooling). <\/li>\n<\/ul>\n<p><\/p>\n<h2> Elulookirjeldus<\/h2>\n<p>\nKindlasti olete juba aru saanud, et ime ei juhtunud. P\u00e4rast selle l\u00fchikese kursuse l\u00e4bimist ei ole v\u00f5imalik t\u00f5eliselt m\u00f5ista, kuidas neuronv\u00f5rgud t\u00f6\u00f6tavad.<\/p>\n<p>Loomulikult ei suutnud ma p\u00e4rast seda iseseisvalt lahendada oma \u00fclesannet fotode klassifitseerimisel jaotusseadmete l\u00fclitite ja nuppude osas. <\/p>\n<p>Aga kokkuv\u00f5ttes on kursus kasulik. See n\u00e4itab, mida saab teha TensorFlow abil ja millises suunas edasi liikuda. <\/p>\n<p>Arvan, et pean esmalt \u00f5ppima Python'i aluseid ja lugema vene keeles raamatuid neuronv\u00f5rkude toimimise kohta, enne kui hakkan TensorFlow'ga tegelema.<\/p>\n<p>L\u00f5petuseks tahaksin t\u00e4nada oma s\u00f5pru, et nad edendasid mind esimese artikli kirjutamisel 'Habr' lehele ja aitasid selle vormistamisel.<\/p>\n<p>P.S. Olen r\u00f5\u00f5mus teie kommentaaride ja iga konstruktiivse kriitika \u00fcle.<br \/>\n<br \/>Allikas: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/487950\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412\u0441\u044e \u0441\u0432\u043e\u044e \u0441\u043e\u0437\u043d\u0430\u0442\u0435\u043b\u044c\u043d\u0443\u044e \u0436\u0438\u0437\u043d\u044c, \u044f \u0431\u044b\u043b \u044d\u043d\u0435\u0440\u0433\u0435\u0442\u0438\u043a\u043e\u043c (\u043d\u0435\u0442, \u0441\u0435\u0439\u0447\u0430\u0441 \u0440\u0435\u0447\u044c \u043d\u0435 \u0438\u0434\u0435\u0442 \u043e \u043d\u0430\u043f\u0438\u0442\u043a\u0435 \u0441 \u0441\u043e\u043c\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u043c\u0438 \u0441\u0432\u043e\u0439\u0441\u0442\u0432\u0430\u043c\u0438). \u042f \u043d\u0438\u043a\u043e\u0433\u0434\u0430 \u043e\u0441\u043e\u0431\u043e \u043d\u0435 \u0438\u043d\u0442\u0435\u0440\u0435\u0441\u043e\u0432\u0430\u043b\u0441\u044f \u043c\u0438\u0440\u043e\u043c \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u043e\u043d\u043d\u044b\u0445 \u0442\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u0439, \u0434\u0430 \u0438 \u0434\u0430\u0436\u0435 \u043c\u0430\u0442\u0440\u0438\u0446\u044b \u044f \u0432\u0440\u044f\u0434 \u043b\u0438 \u043d\u0430 \u043b\u0438\u0441\u0442\u043e\u0447\u043a\u0435 \u0441\u043c\u043e\u0433\u0443 \u043f\u0435\u0440\u0435\u043c\u043d\u043e\u0436\u0438\u0442\u044c. \u0414\u0430 \u0438 \u043d\u0435 \u043d\u0443\u0436\u043d\u043e \u043c\u043d\u0435 \u044d\u0442\u043e \u0431\u044b\u043b\u043e \u043d\u0438\u043a\u043e\u0433\u0434\u0430, \u0447\u0442\u043e\u0431\u044b \u0432\u044b \u043f\u043e\u043d\u0438\u043c\u0430\u043b\u0438 \u043d\u0435\u043c\u043d\u043e\u0433\u043e \u043e \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0435 \u043c\u043e\u0435\u0439 \u0440\u0430\u0431\u043e\u0442\u044b, \u043c\u043e\u0433\u0443 \u043f\u043e\u0434\u0435\u043b\u0438\u0442\u044c\u0441\u044f \u0437\u0430\u043c\u0435\u0447\u0430\u0442\u0435\u043b\u044c\u043d\u043e\u0439 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-56370","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0412\u0441\u044e \u0441\u0432\u043e\u044e \u0441\u043e\u0437\u043d\u0430\u0442\u0435\u043b\u044c\u043d\u0443\u044e \u0436\u0438\u0437\u043d\u044c, \u044f \u0431\u044b\u043b \u044d\u043d\u0435\u0440\u0433\u0435\u0442\u0438\u043a\u043e\u043c (\u043d\u0435\u0442, \u0441\u0435\u0439\u0447\u0430\u0441 \u0440\u0435\u0447\u044c 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