Presentation on "Knowledge acquisition & validation"
- 1. PRESENTATION ON KNOWLEDGE ACQUISITION AND VALIDATION Presented by: ADITYA SARKAR MBA/40076/2019 BIT Mesra Extension Centre Lalpur , Ranchi
- 2. WHAT IS KNOWLEDGE ACQUISITION? Knowledge acquisition is process of extracting , structuring and organising knowledge from one or more sources. It may also include acquiring knowledge from other sources such as books , technical manuscripts and drawings. It includes elicitation, collection, analysis, modelling and validation of knowledge. It facilitates the assimilation of knowledge and experiences of different specialties.
- 3. PROBLEMS IN KNOWLEDGE ACQUISITION Unaware of Knowledge used Unable to verbalize the knowledge May provide irrelevant knowledge May provide incomplete knowledge May provide incorrect knowledge May provide inconsistent knowledge
- 4. THE TASKS IN KNOWLEDGE ACQUISITION Different Tasks involved are: 1) COLLECT 2) INTERPRET 3) ANALYZE 4) DESIGN
- 5. ISSUES WITH KNOWLEDGE ACQUISITION Most knowledge rest with experts so cannot be extracted directly Continuously changing the nature of knowledge Sometimes the knowledge are sub contious An expert is not always correct No single expert knows everything Lack of time and unwillingness to cooperate Incomplete collection of knowledge elicitation method Lack of recognising specific knowledge when mixed up with irrelevant data.
- 7. TECHNIQUES ON KNOWLEDGE ACQUISITION Interviewing - Structured - Semi structured - Unstructured Protocol Analysis Onsite observation Problem Description Manual methods Semi automatic method Automatic methods Induction
- 8. KNOWLEDGE REPRESENTATION Shows the representation of a knowledge. Knowledge components should be represented in such a way that operations storage, retrieval, inference, and facilitated without disturbing the required characteristics of knowledge. Characteristics: I. Should be able to infer new knowledge II. Should be able to provide reasoning and explanation. Types i. Factual ii. Procedural
- 9. KNOWLEDGE VALIDATION Process of testing to determine whether the knowledge in an artificial intelligence system is correct and whether the system performs with an acceptable level of accuracy. Also called as knowledge verification. It act as a component of knowledge engineering process.
- 10. KNOWLEDGE PUBLISHING It is the use of weblogs by knowledge workers or researchers to make their observations, ideas , insights and reactions to other's writing public. Knowledge publishing group is a publication house that publishes scholarly articles from all fields of fundamental and applied research. Tools of knowledge publishing 1) Offline 2) Online
- 11. KNOWLEDGE ENGINEERING It is a field of artificial intelligence that tries to emulate the judgement and behaviour of human expert in the given field. Hence we can say that it is a process of understanding and representing human knowledge in data structures, semantic models , etc
- 12. CONCLUSION Recognition of the central role of knowledge acquisition in the development of ES is an unavoidable prerequisite for any knowledge engineering project. If domains are defined and experts chosen with this in mind, a project's chances for success will be greatly increased. Once an appropriate domain is identified and a cooperative, available expert with the necessary stamina is found, then the practical approaches to knowledge acquisition outlined should be of help. Knowledge acquisition is integrally tied to how the mind organizes and represents information. ... The most important property of knowledge is that it is organized semantically; therefore, learning methods should enhance meaningful study of new information.