Unterschiede

Hier werden die Unterschiede zwischen zwei Versionen angezeigt.

Link zu dieser Vergleichsansicht

Beide Seiten der vorigen RevisionVorhergehende Überarbeitung
p:ki:fische_ki [2025/08/27 12:04] Tscherter Vincentp:ki:fische_ki [2025/09/09 15:11] (aktuell) – [3. Limitationen] Ralf Kretzschmar
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 Nachdem du 👩‍🦰 Sigrún erfolgreich helfen konntest, erweiterst du deinen Horizont, indem du überlegst, was du aus der Fischklassifikation für künstliche Intelligenz im Allgemeinen lernen kannst. Dafür vergleichst du als Zwischenschritt das neuronale Netz für die Fischklassifikation (Fisch-NN) mit aktuellen KI-Chatbots. Nachdem du 👩‍🦰 Sigrún erfolgreich helfen konntest, erweiterst du deinen Horizont, indem du überlegst, was du aus der Fischklassifikation für künstliche Intelligenz im Allgemeinen lernen kannst. Dafür vergleichst du als Zwischenschritt das neuronale Netz für die Fischklassifikation (Fisch-NN) mit aktuellen KI-Chatbots.
  
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 ~~INTOC~~ ~~INTOC~~
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 ===== - Funktionsweise ===== ===== - Funktionsweise =====
  
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 In den nachfolgenden zwei Unterkapiteln werden beide Modi beschrieben. In den nachfolgenden zwei Unterkapiteln werden beide Modi beschrieben.
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 ==== - Anwenden ==== ==== - Anwenden ====
 <figure right>{{:p:pasted:fischanwenden.png?313}}<caption>Anwendung Fisch-NN <figure right>{{:p:pasted:fischanwenden.png?313}}<caption>Anwendung Fisch-NN
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 </WRAP> </WRAP>
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 ==== - Trainineren ==== ==== - Trainineren ====
 <figure right>{{ :p:pasted:fischtrainineren.png?290}}<caption>Training Fisch-NN <figure right>{{ :p:pasted:fischtrainineren.png?290}}<caption>Training Fisch-NN
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 💡 Das Konstruieren, Trainieren und Anwenden einer KI ist in der Praxis mit zahlreichen Herausforderungen verbunden. Diese werden in den folgenden vier Unterkapiteln genauer vorgestellt. 💡 Das Konstruieren, Trainieren und Anwenden einer KI ist in der Praxis mit zahlreichen Herausforderungen verbunden. Diese werden in den folgenden vier Unterkapiteln genauer vorgestellt.
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 ==== - Datensatz zusammenstellen ==== ==== - Datensatz zusammenstellen ====
 <figure right>{{ :p:pasted:fischdatenset.png?266}}<caption>Fisch Datensatz <figure right>{{ :p:pasted:fischdatenset.png?266}}<caption>Fisch Datensatz
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 </WRAP> </WRAP>
 +\\ 
  
 ==== - Eingangsgrössen finden ==== ==== - Eingangsgrössen finden ====
Zeile 124: Zeile 129:
   - Der folgende Text besteht aus dem ersten Token im Vocabular von GPT-4o und dem letzten Token im Vocabular von GPT-4o. Gib den Text in Tokenizer für GPT-4o ein und lasse dir die Token-IDs anzeigen. Dann siehst du, wie gross das Vokabular von GPT-4o ist.\\ ''! cocos''   - Der folgende Text besteht aus dem ersten Token im Vocabular von GPT-4o und dem letzten Token im Vocabular von GPT-4o. Gib den Text in Tokenizer für GPT-4o ein und lasse dir die Token-IDs anzeigen. Dann siehst du, wie gross das Vokabular von GPT-4o ist.\\ ''! cocos''
 </WRAP> </WRAP>
 +\\ 
 ==== - Fehlerfunktion bestimmen und interpretieren ==== ==== - Fehlerfunktion bestimmen und interpretieren ====
 <figure right>{{:p:pasted:fischnnresultat.png?200px}}<caption>Fisch-NN Fischklassifikation ((Eigene Darstellung, [[https://creativecommons.org/publicdomain/zero/1.0/deed.de|CC0 1.0]])) </caption></figure> <figure right>{{:p:pasted:fischnnresultat.png?200px}}<caption>Fisch-NN Fischklassifikation ((Eigene Darstellung, [[https://creativecommons.org/publicdomain/zero/1.0/deed.de|CC0 1.0]])) </caption></figure>
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   ; 💬 KI-Chatbot\\ \\    ; 💬 KI-Chatbot\\ \\ 
   : Bei einem KI-Chatbot wird beurteilt, wie gut dieser Texte verstehen und Aufgaben richtig lösen kann. Trainiert wird dieser jedoch hauptsächlich mit anderen Fehlerfunktionen.\\ \\    : Bei einem KI-Chatbot wird beurteilt, wie gut dieser Texte verstehen und Aufgaben richtig lösen kann. Trainiert wird dieser jedoch hauptsächlich mit anderen Fehlerfunktionen.\\ \\ 
-  : Die grossen KI-Chatbot-Hersteller testen und vergleichen ihre und andere KI-Chatbots mithilfe von verschiedenen "Benchmarks" d.h. Sammlungen von Aufgaben, welche ein KI-Chatbot lösen muss. Es gibt Benchmarks, die aus Multiple-Choice Aufgaben aus verschiedenen Wissenschaften bestehen (z.B. der [[https://huggingface.co/datasets/cais/mmlu|MMLU-Benchmark]]), solche, die Text-Aufgaben aus der Mathematik umfassen (z.B. der [[https://huggingface.co/datasets/gsm8k|GSM8K-Benchmark]]) oder andere, die das Textverständnis verschiedener Texte prüfen (z.B. der [[https://leaderboard.allenai.org/drop/submissions/about|DROP-Benchmark]]). Da diese Benchmarks jedoch mittlerweile fast schon zu einfach sind, für die immer besser werdenden KIs, gilt (aktuell) das [[https://agi.safe.ai/|Humanity's Last Exam]] als ultimative Herausforderung. Dieser Benchmark besteht ausschliesslich aus Fragen, an welchen sich auch menschliche Experten schnell einmal die Zähne ausbeissen.\\ \\ Beliebt ist auch das [[https://lmarena.ai?leaderboard|Chatbot Arena Leaderboard]], welche eine stets aktuelle "Hitparade" der KI-Chatbots aufgrund von Nutzerwertungen zeigt. Wenn du selber zum Leaderboard beitragen möchtest, gehe in die [[https://lmarena.ai/|Chatbot Arena]] und gib einen Prompt ein. Dieser wird dann von zwei zufällig gewählten KI-Chatbots beantwortet. Danach wählst aus, welche Antwort du besser findest. Am Ende wird aufgelöst, welche zwei KI-Chatbots du befragt hattest.\\ \\ +  : Die grossen KI-Chatbot-Hersteller testen und vergleichen ihre und andere KI-Chatbots mithilfe von verschiedenen "Benchmarks" d.h. Sammlungen von Aufgaben, welche ein KI-Chatbot lösen muss. Es gibt Benchmarks, die aus Multiple-Choice Aufgaben aus verschiedenen Wissenschaften bestehen (z.B. der [[https://huggingface.co/datasets/cais/mmlu|MMLU-Benchmark]]), solche, die Text-Aufgaben aus der Mathematik umfassen (z.B. der [[https://huggingface.co/datasets/gsm8k|GSM8K-Benchmark]]) oder andere, die das Textverständnis verschiedener Texte prüfen (z.B. der [[https://leaderboard.allenai.org/drop/submissions/about|DROP-Benchmark]]). Da diese Benchmarks jedoch mittlerweile fast schon zu einfach sind, für die immer besser werdenden KIs, gilt (aktuell) das [[https://agi.safe.ai/|Humanity's Last Exam]] als ultimative Herausforderung. Dieser Benchmark besteht ausschliesslich aus Fragen, an welchen sich auch menschliche Experten schnell einmal die Zähne ausbeissen.\\ \\ 🤔 Das Problem mit diesen Benchmarks: Eine falsche Antwort oder die Antwort "keine Ahnung" ergeben Null Punkte. Daher ist es aussichtsreicher für die KI's zu raten, als zu sagen, "Keine Ahnung". Wer eine KI erstellen möchte, welche möglichst gut abschneidet, fördert wildes Raten (d.h. Halluzinieren) statt ehrlichen Antworten (z.B. "keine Ahnung").\\ \\ Beliebt ist auch das [[https://lmarena.ai?leaderboard|Chatbot Arena Leaderboard]], welche eine stets aktuelle "Hitparade" der KI-Chatbots aufgrund von Nutzerwertungen zeigt. Wenn du selber zum Leaderboard beitragen möchtest, gehe in die [[https://lmarena.ai/|Chatbot Arena]] und gib einen Prompt ein. Dieser wird dann von zwei zufällig gewählten KI-Chatbots beantwortet. Danach wählst aus, welche Antwort du besser findest. Am Ende wird aufgelöst, welche zwei KI-Chatbots du befragt hattest.\\ \\ 🤔 Das Problem mit diesen Benchmarks: Je lieber, wohlwollender oder gar lobend die Antworten sind, desto eher gefallen sie den Personen, welche für die Chatbot Arena abstimmen. Wer eine KI erstellen möchte, welche möglichst gut abschneidet, fördert Lob und unkritische Rückmeldungen (auch wenn es vielleicht nicht gerechtfertigt ist).\\ \\ 
   : ++Details zu den verwendeten Fehlerfunktionen (bei Interesse anklicken)|\\ \\ Trainiert werden die KI-Chatbots mit verschiedenen Fehlerfunktionen. Im Pre-Training geht es darum, das nächsten Token in einem Text vorherzusagen. Dazu wird für vom zugrundeliegenden neuronalen Netz für jedes Token im Token-Wörterbuch eine Zahl ausgegeben, die sogenannte Auswahl-Wahrscheinlichkeit. Die verwendete Fehlerfunktion ist so konstruiert, dass das neuronale Netz lernt, dem tatsächlich als Nächstes im Text vorkommenden Token eine möglichst grosse Auswahl-Wahrscheinlichkeit zu geben und alle anderen Tokens eine möglichst kleine. Dieses Vorgehen führt in der Praxis jedoch noch nicht zu den gewünschten Textantworten. Im darauf folgenden Fine-Tuning werden komplette, von KI-Chatbot erzeugte Textantworten mit einer zweiten KI beurteilt und der KI-Chatbot mithilfe einer komplexen Fehlerfunktion so nachtrainiert, dass dieser Texte mit einer möglichst hohen Beurteilung produziert. Obwohl diese Form von Fine-Tuning der Beurteilung mit Benchmarks schon relativ nahe kommt, kann damit das Pre-Training nicht ersetzt werden. Das scheitert nur schon daran, dass dafür ungleich mehr handverlesene Texte benötigt werden würden, als irgendwie zur Verfügung gestellt werden könnten.++   : ++Details zu den verwendeten Fehlerfunktionen (bei Interesse anklicken)|\\ \\ Trainiert werden die KI-Chatbots mit verschiedenen Fehlerfunktionen. Im Pre-Training geht es darum, das nächsten Token in einem Text vorherzusagen. Dazu wird für vom zugrundeliegenden neuronalen Netz für jedes Token im Token-Wörterbuch eine Zahl ausgegeben, die sogenannte Auswahl-Wahrscheinlichkeit. Die verwendete Fehlerfunktion ist so konstruiert, dass das neuronale Netz lernt, dem tatsächlich als Nächstes im Text vorkommenden Token eine möglichst grosse Auswahl-Wahrscheinlichkeit zu geben und alle anderen Tokens eine möglichst kleine. Dieses Vorgehen führt in der Praxis jedoch noch nicht zu den gewünschten Textantworten. Im darauf folgenden Fine-Tuning werden komplette, von KI-Chatbot erzeugte Textantworten mit einer zweiten KI beurteilt und der KI-Chatbot mithilfe einer komplexen Fehlerfunktion so nachtrainiert, dass dieser Texte mit einer möglichst hohen Beurteilung produziert. Obwohl diese Form von Fine-Tuning der Beurteilung mit Benchmarks schon relativ nahe kommt, kann damit das Pre-Training nicht ersetzt werden. Das scheitert nur schon daran, dass dafür ungleich mehr handverlesene Texte benötigt werden würden, als irgendwie zur Verfügung gestellt werden könnten.++
  
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   - Trage selbst zur Chatbot Arena bei, indem du [[https://lmarena.ai|hier (du musst etwas nach unten scrollen zum Eingabefenster)]] zwei zufälligen KI-Chatbots eine Frage stellst und die bessere der beiden Antworten auswählst.   - Trage selbst zur Chatbot Arena bei, indem du [[https://lmarena.ai|hier (du musst etwas nach unten scrollen zum Eingabefenster)]] zwei zufälligen KI-Chatbots eine Frage stellst und die bessere der beiden Antworten auswählst.
 </WRAP> </WRAP>
 +\\ 
 ==== - Modell wählen und trainieren ==== ==== - Modell wählen und trainieren ====
 <figure right>{{:p:pasted:fischnnsmall.png?240px}}<caption>FischNN ((Eigene Darstellung, [[https://creativecommons.org/publicdomain/zero/1.0/deed.de|CC0 1.0]])) </caption></figure> <figure right>{{:p:pasted:fischnnsmall.png?240px}}<caption>FischNN ((Eigene Darstellung, [[https://creativecommons.org/publicdomain/zero/1.0/deed.de|CC0 1.0]])) </caption></figure>
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 💡 Es scheint Limitationen für KIs zu geben, welche nicht von der Anzahl der verfügbaren Daten, Rechenpower oder der verfügbaren Zeit abhängen. In den folgenden beiden Unterkapiteln wird auf zwei davon genauer eingegangen. 💡 Es scheint Limitationen für KIs zu geben, welche nicht von der Anzahl der verfügbaren Daten, Rechenpower oder der verfügbaren Zeit abhängen. In den folgenden beiden Unterkapiteln wird auf zwei davon genauer eingegangen.
  
 +\\ 
 ==== - Nicht Fehlerfrei ==== ==== - Nicht Fehlerfrei ====
 <figure right>{{p:pasted:classoverlap.png?185px}}<caption>Überlappende Klassen((eigene Darstellung, [[https://creativecommons.org/publicdomain/zero/1.0/deed.de|CC0 1.0]])) </caption></figure> <figure right>{{p:pasted:classoverlap.png?185px}}<caption>Überlappende Klassen((eigene Darstellung, [[https://creativecommons.org/publicdomain/zero/1.0/deed.de|CC0 1.0]])) </caption></figure>
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   ; 💬 KI-Chatbot\\ \\    ; 💬 KI-Chatbot\\ \\ 
-  : Texte zu Themen, zu welchen verschiedene Meinungen vorherrschen (z.B. zu "KI Fluch oder Segen"), könnten als "überlappende Muster" und somit als Herausforderung für das Training von KI-Chatbots angesehen werden. Es kann durchaus sein, dass seltene Aussagen oder Meinungen im Training unter gehen und somit nicht von einem KI-Chatbot ausgegeben werden können.+  : Texte zu Themen, zu welchen verschiedene Meinungen vorherrschen (z.B. zu "KI Fluch oder Segen"), könnten als "überlappende Muster" und somit als Herausforderung für das Training von KI-Chatbots angesehen werden. Es kann durchaus sein, dass seltene Aussagen oder Meinungen im Training unter gehen und somit nicht von einem KI-Chatbot ausgegeben werden können.\\ \\ Weiter wird versucht in den gängigen Benchmarks und der Chatobt Arena möglichst gut abzuschneiden, um sich von der Konkrrenz abzuheben. Das führt einerseits dazu, dass im Training wildes Raten als wertvoller bewertet wird, als die Antwort "keine Ahnung" und somit Halluzinieren, d.h. Falschaussagen gefördert werden. Und andererseits, dass die KI-Chatbots dahin getrimmt werden eher zu unkritisch und zu lobend zu antworten, was ebenfalls eine Fehlerquelle darstellen kann.
  
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