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Case Adaptation

Case Adaptation. Sources: Chapter 8 www.iiia.csic.es/People/enric/AICom.html www.ai-cbr.org. New problem. Selected case. Solution. Adaptation knowledge. Adaptation. Adaptation. Classes of Adaptation. Transformational Analogy Substitutional Adaptation Feedback based constraint based

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Case Adaptation

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  1. Case Adaptation Sources: Chapter 8 www.iiia.csic.es/People/enric/AICom.html www.ai-cbr.org

  2. New problem Selected case Solution Adaptation knowledge Adaptation Adaptation

  3. Classes of Adaptation • Transformational Analogy • Substitutional Adaptation • Feedback based • constraint based • Compositional adaptation • Generative Solution Adaptation • Transformational Analogy • Derivational Analogy

  4. Substitutional Adaptation • Let C = (P,S); A problem P and a solution S • Adaptation problem: • Given • A problem P’ • A case C such that P is similar to P’ • Search a substitution  such that (S) solves P’ •  is not a substitution in the traditional sense

  5. Example Support for PC sale: • Cases are configuration episodes of PCs • User specifies his/hers requirements • System selects best PC (CCBR) and change some components Example rules (Substitutional Adaptation): If (query.application = ‘database’ and case.diskSpace < 2GB) then target. diskSpace 4GB

  6. Example (2) Example rules (Substitutional Adaptation): If (query.application = ‘games’ and case.application  ‘games’) then AddObject target.addJoystick AddObject target.addSound Other rules to configure joystick and sound

  7. CaseB (old) CaseA (new) Car type: sport Color: red Seating: 2 Valves: 48 Type: 5.7L Model name: name1 Price: 200,000 Year: 2003 Feedback: not successful Cause: price is too high Car type: sport Color: red Seating: 2 Valves: 48 Type: 5.7L Model name: name1 Price: 200,000 Year: 2003 Feedback: successful Retrieve Copy Adapt CaseC (adapted) Car type: sport Color: red Seating: 2 Valves: 40 Type: 3.6L Model name: name 2 Price: 150,000 Year: 2000 Feedback: successful Substitutional Feedback-based

  8. Substitutional Constraint-based CaseB (old) CaseA (new) Case ID: 456 Speed: high Price: middle Usage: sport Antitheft performance: middle Model Name: Toyota Sedan 07 Price: 10,500 Antitheft system: Product A Case ID: 123 Speed: high Price: middle Usage: sport Antitheft performance: high Model Name: Toyota Sedan 07 Price: 10,500 Antitheft system: Product A Retrieve Copy adapt CaseC (adapted) Case ID: 123 Speed: high Price: middle Usage: sport Antitheft performance: high Model Name: Toyota Sedan 07+ Price: 11,000 Antitheft system: Product B Constraint: Antitheft performance: high Antitheft performance: product B Price: +500

  9. 1 2 n … (P’,S’) (P,C) Compositional Adaptation • Let C = (P,S); A problem P and a solution S • Adaptation problem: • Given • A problem P’ • A case C such that P is similar to P’ • Search a sequence of substitutions 1, …, nsuch that: S’ is a solution for P’

  10. 1 2 n … (P’,S’) (P,C) Adaptation Operators (2) • Reminds you of anything? Planning/rule-based reasoning! • Roles of operators/rules: • General knowledge about the domain Adaptation knowledge

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