{"id":72898,"date":"2020-03-05T20:42:08","date_gmt":"2020-03-05T17:42:08","guid":{"rendered":"https:\/\/prohoster.info\/blog\/administrirovanie\/kak-otkryt-kommentarii-i-ne-potonut-v-spame"},"modified":"2020-03-05T20:42:08","modified_gmt":"2020-03-05T17:42:08","slug":"kak-otkryt-kommentarii-i-ne-potonut-v-spame","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/administrirovanie\/kak-otkryt-kommentarii-i-ne-potonut-v-spame","title":{"rendered":"Kuidas avada kommentaarid ja mitte sp\u00e4mmi uppuda","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><img decoding=\"async\" alt=\"Kuidas avada kommentaarid ja mitte sp\u00e4mmi uppuda\" src=\"\/wp-content\/uploads\/2020\/03\/46627a51e5d6ab7f27495d51b1f93252.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nKui sinu t\u00f6\u00f6ks on midagi kaunist luua, siis ei olegi sellest v\u00e4ga palju r\u00e4\u00e4kida, sest tulemus on k\u00f5igile silme ees. Kui aga sa kustutad kirju aedadelt, siis ei pane keegi su t\u00f6\u00f6d t\u00e4hele, kuni aiad n\u00e4evad head v\u00e4lja v\u00f5i kuni sa ei kustuta midagi vale.<\/p>\n<p>Igasugune teenus, kus saab j\u00e4tta kommentaare, arvustusi, saata s\u00f5numeid v\u00f5i laadida \u00fcles pilte, satub varem v\u00f5i hiljem r\u00fcnnakute, petmise ja roppuste probleemide ette. Seda ei saa v\u00e4ltida, kuid sellega tuleb v\u00f5idelda. <\/p>\n<p>Minu nimi on Mihhail, ma t\u00f6\u00f6tan Antispami meeskonnas, mis kaitseb Yandexi teenuste kasutajaid selliste probleemide eest. Meie t\u00f6\u00f6 on harva n\u00e4htav (ja h\u00e4sti!), seega t\u00e4na r\u00e4\u00e4gin sellest rohkem. Sa saad teada, millal on modereerimine kasutu ja miks t\u00e4psus ei ole ainus selle efektiivsuse m\u00f5\u00f5dik. Samuti r\u00e4\u00e4gime roppusest kasside ja koerte n\u00e4itel ja sellest, miks on vahel kasulik \"m\u00f5elda nagu roppuse r\u00e4\u00e4kija\". <br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><br \/>\nYandexis tekib j\u00e4rjest rohkem teenuseid, kus kasutajad avaldavad oma sisu. Sa saad esitada k\u00fcsimuse v\u00f5i kirjutada vastuse Yandex.Q-s, arutada \u00f5ue uudiseid Yandex.Kvartalis, jagada liiklusolusid Yandex.Mapides. Aga kui teenuse publik kasvab, muutub see petturite ja r\u00e4mpspostitajate jaoks atraktiivseks. Nad tulevad ja t\u00e4idavad kommentaarid: pakuvad kerget teenimist, reklaamivad imelikke vahendeid ja lubavad sotsiaalseid toetusi. R\u00e4mpspostitajate t\u00f5ttu kaotavad m\u00f5ned kasutajad raha, teised aga soovi veeta aega hoolitsemata, r\u00e4mpsuga kaetud teenuses.<\/p>\n<p>Ja see ei ole ainus probleem. Me p\u00fc\u00fcame mitte ainult kaitsta kasutajaid petturite eest, vaid ka luua mugava suhtluskeskkonna. Kui inimesed kommentaarides puutuvad kokku roppuse ja solvangutega, on t\u00f5en\u00e4oliselt nad lahkumas ja ei tule enam tagasi. Seega tuleb ka sellega osata v\u00f5idelda. <\/p>\n<h3>Puhtaid Veeb<\/h3>\n<p>\nKuidas see meil tihti juhtub, s\u00fcndisid esimesed arengud Otsingus, osas, mis v\u00f5itleb r\u00e4mpsposti vastu tulemuses. Umbes k\u00fcmme aastat tagasi tekkis seal t\u00e4iskasvanud sisu filtreerimise \u00fclesanne peres\u00f5bralikuks otsimiseks ja p\u00e4ringuteks, mis ei eelda vastuseid kategooriast 18+. Nii tekkisid esimesed k\u00e4sitsi koostatud porno ja roppuse s\u00f5nastikud, mida t\u00e4iendati anal\u00fc\u00fctikute poolt. Peamine \u00fclesanne oli klassifitseerida p\u00e4ringud nende vahel, kus t\u00e4iskasvanud sisu on lubatud ja kus mitte. Selle \u00fclesande t\u00e4itmiseks koguti m\u00e4rgendus, ehitati heuristikad ja treeniti mudeleid. Nii tekkisid esimesed arendused soovimatute sisu filtreerimiseks.<\/p>\n<p>Aja jooksul hakkas Yandexis ilmuma UGC (kasutajate genereeritud sisu) \u2014 s\u00f5numid, mida kirjutavad kasutajad ise, ja Yandex lihtsalt avaldab need. \u00dclaltoodud p\u00f5hjustel ei olnud paljusid s\u00f5numeid v\u00f5imalik publitseerida niisama \u2014 n\u00f5uti modereerimist. Siis otsustati luua teenus, mis pakuks kaitset r\u00e4mpsposti ja pahategijate eest k\u00f5igi Yandexi UGC-toodete jaoks ja kasutaks arendusi soovimatu sisu filtreerimiseks Otsingus. Teenus nimetati \"Puhtaks Veebiks\". <\/p>\n<h3>Uued \u00fclesanded ja abiliste abi<\/h3>\n<p>\nEsialgu t\u00f6\u00f6tas meil vaid lihtne automaatika: teenused saatsid meile tekstid ning me jooksutasime neile l\u00e4bi roppuse s\u00f5nastikud, pornograafia s\u00f5nastikud ja regulaaravaldised \u2014 anal\u00fc\u00fctikud koostasid k\u00f5ik k\u00e4sitsi. Kuid teenust hakati aja jooksul rakendama \u00fcha rohkemates Yandexi toodetes ja me pidime \u00f5ppima, kuidas uute probleemidega toime tulla. <\/p>\n<p>Tihti avaldavad kasutajad arvustuse asemel m\u00f5ttetut t\u00e4htede kogumit, p\u00fc\u00fcdes endale saavutusi t\u00f5sta, m\u00f5nikord reklaamivad nad oma ettev\u00f5tet konkurendi arvustustes, ja m\u00f5nikord lihtsalt segavad organisatsioone, kirjutades n\u00e4iteks lemmikloomapoest: \u201eKenas valmistatud kala!\u201d. V\u00f5ib-olla \u00f5pib kunagi tehisintellekt ideaalset m\u00f5istma iga teksti, kuid praegu suudab automaatika vahel inimestest halvemini hakkama saada. <\/p>\n<p>Selge on, et k\u00e4sitsi m\u00e4rgendamiseta ei saa siin hakkama, ja nii lisasime meie s\u00fcsteemile teise astme \u2014 saatmine inimeste k\u00e4sitsi kontrollimiseks. Siia kuulusid need avaldatud tekstid, mille kohta klassifikaator probleeme ei tuvastanud. Sellise \u00fclesande mastaape v\u00f5ib kergesti ette kujutada, seet\u00f5ttu ei lasknud me end ainult hindajatest aidata, vaid kasutasime ka \"rahva tarkust\", s.o. p\u00f6\u00f6rdusime appi tolooker'ite poole. Just nemad aitavad meil tuvastada seda, mida masin on t\u00e4helepanuta j\u00e4tnud, ja selle kaudu koolitavad meid. <\/p>\n<h3>Nutikas vahem\u00e4lu ja LSH-hashing<\/h3>\n<p>\nVeel \u00fcks probleem, millega me kommentaaride t\u00f6\u00f6tlemisel silmitsi seisisime, oli r\u00e4mpspost, t\u00e4psemalt selle maht ja leviku kiirus. Kui Yandex.Regioni publik kiiresti kasvas, ilmusid sinna sp\u00e4mmerid. Nad \u00f5ppisid v\u00e4ltima regulaatorite kontrolli, kergelt muutes teksti. R\u00e4mpsposti leidsime ja k\u00f5rvaldasime loomulikult, kuid Yandexi ulatuses v\u00f5is isegi viie minuti jooksul avaldatud sobimatu s\u00f5numit n\u00e4ha sadu inimesi. <\/p>\n<p><img decoding=\"async\" alt=\"Kuidas avada kommentaarid ja mitte sp\u00e4mmi uppuda\" src=\"\/wp-content\/uploads\/2020\/03\/0cd9d7d50706ad32344dca0e90ff9da9.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nSee, muidugi, ei rahuldanud meid, ja me rakendasime nutikat teksti vahem\u00e4lu p\u00f5hjal LSH (<noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/Locality-sensitive_hashing\">locality-sensitive hashing<\/a><\/noindex>). See the process works like this: we normalized the text, removing links and segmenting it into n-grams (sequences of n letters). Next, we computed hashes from the n-grams, which were then used to construct the document's LSH vector. The idea is that similar texts, even with slight modifications, would transform into similar vectors. <\/p>\n<p>This solution allowed us to reuse classifiers' and moderators' verdicts for similar texts. In a spam attack, once the first message passed the check and was cached with a verdict of 'spam,' all new similar messages, even if modified, received the same verdict and were automatically deleted. Later, we learned to train and automatically retrain spam classifiers, but this 'smart cache' has remained with us and still helps us frequently.<\/p>\n<h3>Classifier of good texts<\/h3>\n<p>\nKahe tuleb v\u00f5itlemisest sp\u00e4mmi vastu, olime t\u00e4heldanud, et 95% meie sisust modereeritakse k\u00e4sitsi: klassifikaatorid reageerivad ainult rikkumistele ja enamus tekstidest on head. Koormatame tolokaatoreid, kes 95 juhul 100-st annavad hinnangu \u201eK\u00f5ik OK\u201c. Pidi hakkama tegelema harjumatute t\u00f6\u00f6dega \u2014 looma hea sisu klassifikaatoreid, \u00f5nneks on selle ajaga piisavalt m\u00e4rgistusi kogunenud.<\/p>\n<p>Esimene klassifikaator n\u00e4gi v\u00e4lja selline: lemmatiseerime teksti (toome s\u00f5nad algvormi), viskame v\u00e4lja k\u00f5ik teenindavad osakesed ja rakendame ettevalmistatud \u201ehead lammutuse s\u00f5nastikku\u201c. Kui tekstis on k\u00f5ik s\u00f5nad \u201ehead\u201c, siis ei sisalda kogu tekst rikkumisi. Erinevates teenustes t\u00f5i selline l\u00e4henemine kohe 25%-35% seadistusautomaatikast. Loomulikult ei ole selline l\u00e4henemine ideaalne: ei ole raske kombineerida mitut s\u00fc\u00fctut s\u00f5na ja saada v\u00e4ga solvav v\u00e4ljend, kuid see lubas meil kiiresti j\u00f5uda heale automatiseerimise tasemele ja andis aega keerukamate mudelite \u00f5petamiseks.<\/p>\n<p>J\u00e4rgmised heade tekstide klassifikaatorite versioonid on juba sisaldanud nii lineaare kui ka otsustuspuid ning nende kombinatsioone. N\u00e4iteks proovime ebaviisakuste ja solvangute m\u00e4rgistamiseks kasutada BERT n\u00e4rviv\u00f5rku. Siin on oluline m\u00f5ista s\u00f5na t\u00e4hendust kontekstis ja s\u00f5nade vahelist seost erinevates lausetes, millega BERT h\u00e4sti toime tuleb. (Muide, hiljuti r\u00e4\u00e4givad kolleegid uudistes <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/yandex\/blog\/479662\/\">olen r\u00e4\u00e4kinud<\/a><\/noindex>, kuidas tehnoloogiat kasutatakse ebatavalise \u00fclesande, n\u00e4iteks pealkirjade vigade leidmise jaoks.) L\u00f5puks \u00f5nnestus automatiseerida kuni 90% voost, s\u00f5ltuvalt teenusest. <\/p>\n<h3>T\u00e4psus, t\u00e4ielikkus ja kiirus<\/h3>\n<p>\nKuna edasi liikuda, tuleb m\u00f5ista, millist kasu toovad erinevad automaatsed klassifikaatorid, muudatused neis, samuti see, kas k\u00e4sitsi kontrollide kvaliteet ei halvene. Selle jaoks kasutame t\u00e4psuse ja t\u00e4ielikkuse n\u00e4itajaid. <\/p>\n<p>T\u00e4psus on vale otsuste osakaal k\u00f5igi halva sisu otsuste seas. Mida k\u00f5rgem on t\u00e4psus, seda v\u00e4hem valeh\u00e4ireid esineb. Kui t\u00e4psust t\u00e4helepanuta j\u00e4tta, on teoreetiliselt v\u00f5imalik eemaldada kogu r\u00e4mps ja roppus, v\u00f5ttes samaaegselt kaasa pool headest s\u00f5numitest. Teisest k\u00fcljest, kui toetuda ainult t\u00e4psusele, on parim tehnoloogia see, mis mitte kedagi ei tuvasta. Seet\u00f5ttu on olemas ka katvuse n\u00e4itaja: halva sisu osakaal tuvastatud halva sisu kogumahu seas. Need kaks m\u00f5\u00f5dikut tasakaalustavad \u00fcksteist. <\/p>\n<p>Kasutamiseks m\u00f5\u00f5dame iga teenuse kogu sisendvoogu ja anname sisuproovid ekspertidele hindamiseks, et v\u00f5rrelda masinlahendustega. <\/p>\n<p>Kuid on veel \u00fcks oluline n\u00e4itaja. <\/p>\n<p>Olen varem maininud, et mitteaktsepteeritavat s\u00f5numit v\u00f5ivad 5 minutiga n\u00e4ha sajad inimesed. Seet\u00f5ttu arvestame, mitu korda oleme halba sisu inimestele n\u00e4idanud, enne kui selle peidame. See on oluline, sest pole piisav t\u00f6\u00f6tada kvaliteetselt \u2014 tuleb t\u00f6\u00f6tada ka kiiresti. Kui ehitasime roppuse kaitset, tajusime seda t\u00e4ielikult. <\/p>\n<h3>Roppuse vastane n\u00e4ide kassidest ja koertest<\/h3>\n<p>\nL\u00fchike luuleline k\u00f5rvalep\u00f5ige. Keegi v\u00f5ib \u00f6elda, et roppused ja solvangud ei ole nii ohtlikud kui pahatahtlikud lingid ja ei ole nii h\u00e4irivad kui r\u00e4mpspost. Kuid meie eesm\u00e4rk on s\u00e4ilitada mugavad suhtlemistingimused miljonite kasutajate jaoks, ning inimesed ei taha naasta kohtadesse, kus neid solvatakse. Pole t\u00e4htis, et roppuste ja solvangute keelamine on kirjas paljude kogukondade reeglites, sealhulgas ka Habr's. Aga las ma ei kaldun k\u00f5rvale. <\/p>\n<p>Roomikeelne s\u00f5nastik ei suuda hallata kogu vene keele rikkust. Kuigi on vaid neli p\u00f5hijoont, saab neist moodustada tohutu hulga s\u00f5nu, millega ei saa mingite regulaarsete v\u00e4ljenditega hakkama. Lisaks saab s\u00f5nu osaliselt kirjutada transkriptsioonina, asendada t\u00e4hti sarnaste kombinatsioonide v\u00f5i s\u00fcmbolitega, \u00fcmber paigutada t\u00e4hti, lisada t\u00e4hiseid jne. M\u00f5nikord ei saa konteksti puudumisel \u00fcldse m\u00e4\u00e4rata, mida kasutaja roppuses m\u00f5tles. Austame Habr reegleid, seet\u00f5ttu demonstreerime seda mitte elusate n\u00e4idete, vaid kasside ja koerte abil. <\/p>\n<p><img decoding=\"async\" alt=\"Kuidas avada kommentaarid ja mitte sp\u00e4mmi uppuda\" src=\"\/wp-content\/uploads\/2020\/03\/1cbb2b02e7c996753465a64cb6ac9657.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n\"Miau,\" \u00fctles kass. Kuid me m\u00f5istame, et kass \u00fctles midagi muud...<\/p>\n<p>Oleme hakanud m\u00f5tlema meie s\u00f5nastiku \"h\u00e4guse sobitamise\" algoritmide ja nutikama eelt\u00f6\u00f6tluse peale: viisime l\u00e4bi transliteratsiooni, liitsime t\u00fchikud ja punctuation, otsisime mustreid ning kirjutasime nendele eraldi regulaaravaldisi. Selline l\u00e4henemine andis tulemusi, kuid sageli v\u00e4hendas see t\u00e4psust, j\u00e4ttes soovitud t\u00e4ielikkuse saavuttamata.<\/p>\n<p>Siis otsustasime \"m\u00f5elda nagu roppused\". Me hakkasime ise andmetesse m\u00fcra lisama: liigutades t\u00e4hti, genereerides tr\u00fckivigu, asendades t\u00e4hed sarnastega jne. Algset m\u00e4rgistust saime, rakendades roppuste s\u00f5nastikke suurtele tekstikorpusitele. Kui v\u00f5tta \u00fcks lause ja v\u00e4\u00e4rata seda mitmel moel, saab juba palju lauseid. Sellise l\u00e4henemisega saab treeningu valimi kasvatada k\u00fcmneid kordi. J\u00e4\u00e4kis vaid \u00f5petada sellel saagil mingit korralikku mudelit, arvesse v\u00f5ttes konteksti. <\/p>\n<p><img decoding=\"async\" alt=\"Kuidas avada kommentaarid ja mitte sp\u00e4mmi uppuda\" src=\"\/wp-content\/uploads\/2020\/03\/48bbde39deacacc39a60bcb07379ca90.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nL\u00f5pliku lahenduse kohta on veel vara r\u00e4\u00e4kida. Katsetame endiselt l\u00e4henemisi selle probleemi lahendamiseks, kuid n\u00e4eme juba, et lihtne m\u00e4rkide konvolutsiooniv\u00f5rk mitmest kihist \u00fcletab selgelt s\u00f5nastikke ja regulaaravaldise: tulemuseks on nii t\u00e4psuse kui t\u00e4ielikkuse suurenemine.<\/p>\n<p>Muidugi m\u00f5istame, et alati leidub viise isegi k\u00f5ige arenenuma automaatika \u00fcletamiseks, eriti kui m\u00e4ng on nii kaasahaarav: kirjutada nii, et rumal masin ei m\u00f5istaks. Siin, nagu ka r\u00fcnnakute t\u00f5rjumisel, ei ole meie eesm\u00e4rk h\u00e4vitada v\u00f5imalust kirjutada midagi sobimatut, vaid teha nii, et m\u00e4ng ei oleks vaeva v\u00e4\u00e4rt.<\/p>\n<p>Oma arvamuse jagamine, suhtlemine ja kommenteerimine on lihtne. Kaugemale, turvaliste, mugavate tingimuste ja austava suhtumise saavutamine on palju keerulisem. Ilma selleta ei saa \u00fckski kogukond areneda.<br \/>\n<br \/>Allikas: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/yandex\/blog\/490836\/\">habr.com<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041a\u043e\u0433\u0434\u0430 \u0442\u0432\u043e\u044f \u0440\u0430\u0431\u043e\u0442\u0430 \u2014 \u0441\u043e\u0437\u0434\u0430\u0432\u0430\u0442\u044c \u0447\u0442\u043e-\u0442\u043e \u043a\u0440\u0430\u0441\u0438\u0432\u043e\u0435, \u043e \u043d\u0435\u0439 \u043c\u043e\u0436\u043d\u043e \u043e\u0441\u043e\u0431\u0435\u043d\u043d\u043e \u043d\u0435 \u0440\u0430\u0441\u0441\u043a\u0430\u0437\u044b\u0432\u0430\u0442\u044c, \u043f\u043e\u0442\u043e\u043c\u0443 \u0447\u0442\u043e \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442 \u0443 \u0432\u0441\u0435\u0445 \u043f\u0435\u0440\u0435\u0434 \u0433\u043b\u0430\u0437\u0430\u043c\u0438. \u0410 \u0432\u043e\u0442 \u0435\u0441\u043b\u0438 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