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異常検知ライブラリを作った話
tsurubee
November 18, 2017
Technology
0
640
異常検知ライブラリを作った話
ライブラリの特徴:特異スペクトル変換による変化点検知
tsurubee
November 18, 2017
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Transcript
ҟৗݕϥΠϒϥϦ Λ࡞ͬͨ भ %BUB4DJFOUJTU.FFU6Q
ࣗݾհ ా തจ ʢ!UTVSVCFFʣ ΤϯδχΞྺɿ ͪΐ͍ େֶͷઐ߈Խֶ લ৬ফ࢜ झຯےτϨ ʢಛʹϕϯνϓϨεʣ
ࠓճͷ༰ɾɾ લʹθϩ͔ΒϓϩάϥϛϯάΛ࢝Ίͨࢲ͕ɺ ϊϦͱؾ߹͍ͰҟৗݕϥΠϒϥϦΛ࡞ͬͨ ɾҟৗݕʹ͍ͭͯ ɾϥΠϒϥϦΛ࡞ͬͨഎܠ ɾ࣮ΞϧΰϦζϜ ɾϦΞϧλΠϜҟৗࢹͷσϞ ͳͲͳͲɾɾ
ҟৗݕͱʁ
େଟͷσʔλͱৼΔ͍͕ ҟͳΔσʔλΛݕग़͢Δٕज़ σʔλϚΠχϯά نଇੑ ҟৗ σʔλͷࢁ
ҟৗݕͷԠ༻ྫ ίϯϐϡʔλΠϧε%PT߈ܸͷૣظൃݟ ηΩϡϦςΟ ނো༧ஹݕ ػց ྲྀߦͷݕɾ৽τϐοΫͷൃݟɾ ϢʔβߦಈͷมԽݕ ϚʔέςΟϯά
ҟৗσʔλྫ ʙͦͷ̍
ҟৗσʔλྫ ʙͦͷ̍ ҟৗʂ
ҟৗʂ if value > 120: print('ERROR!') JGจͰݕͰ͖ͦ͏ʂ ҟৗσʔλྫ ʙͦͷ̍
ҟৗσʔλྫ ʙͦͷ̎
Կ͔ҟৗ͕ى͖ͯΔ ҟৗʹ͍Ζ͍Ζ͋Δ ҟৗσʔλྫ ʙͦͷ̎
ҟৗݕͷྨ ֎Εݕ มԽݕ ҟৗݕ ٸܹͳৼΔ͍ͷมԽΛݕ ࣌ܥྻϞσϧ ଞͱେ͖͘ҟͳΔΛݕ ಠཱϞσϧ
ҟৗݕͷྨ ֎Εݕ มԽݕ ҟৗݕ ࠓճίονͷʂ ٸܹͳৼΔ͍ͷมԽΛݕ ࣌ܥྻϞσϧ ଞͱେ͖͘ҟͳΔΛݕ ಠཱϞσϧ
ҟৗݕϥΠϒϥϦ ʹ͍ͭͯ
ͳͥ࡞͔ͬͨ ͍ͭͷ͔ɺٕज़Λ͍͜ͳ͢ଆͰͳ͘ ࡞ΔଆʹͳΓ͍ͨ ϚΠϯυతഎܠ σʔλαΠΤϯεతഎܠ ϏδωεͷݱʹᷓΕΔ࣌ܥྻσʔλ ʢྫ͑ɺച্σʔλɾΞΫηεϩάͳͲʣ ͷมԽͷஹީΛ͍ͪૣ͘ݕ͍ͨ͠
࡞ͬͨͷ ಛʢڧΈʣԿʁ #BOQFJʢ൪ฌʣ ɿ1ZUIPOҟৗݕύοέʔδ "ಛҟεϖΫτϧมʹΑΔ࣌ܥྻσʔλͷมԽݕ ಛఆͷ֬ΛԾఆ͍ͯ͠ͳ͍ͨΊɺ ᶃଟ༷ͳมԽʹؤڧʹରԠͰ͖ɺ ᶄύϥϝʔλνϡʔχϯά͕༰қͳ มԽݕ͕Մೳ
ಛҟεϖΫτϧม ࣌ࠁ ཤྺߦྻ" ςετߦྻ# ओ෦ۭؒ ",''', ( ",''', ( มԽ
શମΠϝʔδ ʮೖػցֶशʹΑΔҟৗݕ ʕ3ʹΑΔ࣮ફΨΠυʯͷਤ Λࢀߟʹ࡞ աڈଆͱݱࡏଆͷߦྻಉ࢜ͷ৯͍ҧ͍ͷେ͖͞ΛఆྔԽ
มԽͷఆٛ ಛҟղʹΑΔಛύλʔϯͷநग़ 9 6 7 ಛҟ্ҐͷࠨಛҟϕΫτϧΛ NຊऔΓग़͢ աڈଆ ݱࡏଆ
( ͷ࠷େಛҟ) 4 ֊SΛͭNºOߦྻ9 N O S S O S มԽ
#BOQFJͷ͍ํ ҟৗݕ ϋΠύʔύϥϝʔλʢXʣɿεϥΠυ૭ͷαΠζ ΠϯϓοτʢEBUBʣϦετܕ/VN1Z BSSBZͳͲͷσʔλྻ ΞτϓοτʢSFTVMUTʣΠϯϓοτͱಉ͡αΠζͷ/VN1Z BSSBZ git clone https://github.com/tsurubee/banpei.git
cd banpei pip install . Πϯετʔϧ import banpei model = banpei.SST(w=50) results = model.detect(data) ˞ͨͬͨ̏ߦʂ
#BOQFJʹΑΔपҟৗݕ
#PLFIͱͷ࿈ܞʹΑΔ ϦΞϧλΠϜҟৗࢹ ͷઓ
#PLFIͱʁ IUUQTCPLFIQZEBUBPSHFOMBUFTU ɾ*OUFSBDUJWFWJTVBMJ[FUJPO ɾ/PWFMHSBQIJDT ɾ4USFBNJOH EZOBNJD MBSHFEBUB ɾ/POFFEUPXSJUF+BWBTDSJQU ରܕՄࢹԽڥΛఏڙ͢Δ1ZUIPOϥΠϒϥϦ IUUQTXXXTMJEFTIBSFOFUDPOUJOVVNJPIBTTMFGSFFEBUBTDJFODFBQQTXJUICPLFIXFCJOBS
σ Ϟ
• ʮಛҟεϖΫτϧมʹΑΔपҟৗݕʯ IUUQTZPVUVCFF'7/,"7U/1 • ʮಛҟεϖΫτϧมʹΑΔ͖ͷมԽݕʯ IUUQTZPVUVCF@XPVC-"I9L :PV5VCFʹσϞಈըΛެ։͍ͯ͠·͢ʂ
(JU)VCʹެ։͍ͯ͠·͢ʂ IUUQTHJUIVCDPNUTVSVCFFCBOQFJ
ϒϩάॻ͍͍ͯ·͢ʂ IUUQTHJUIVCDPNUTVSVCFFCBOQFJ
ࠓޙͷల l ಛҟεϖΫτϧมͷߴԽʹΑΔߋͳΔ ϦΞϧλΠϜੑͷٻ l ҟৗ௨ػೳͷ࣮ʹΑΔ࣮༻ੑͷ্ ͋ͱɺ৽ͨͳΞϧΰϦζϜ࣮͍ͨ͠ɾɾ
1ZUIPOίϛϡχςΟ ʹ͍ͭͯ
1Z'VLVPLBͬͯ·͢ʂ ݄ʹ-5ΠϕϯτΛ։࠵༧ఆͰ͢ʂ
1Z$PO ,ZVTIVΓ·͢ʂ ελοϑืूதʂ ڵຯ͕͋Δํ࠙ձͰ͓͔͚͍ͩ͘͞ʂ IUUQLZVTIVQZDPOKQ
͝ਗ਼ௌ͋Γ͕ͱ͏ ͍͟͝·ͨ͠ʂ