1 / 10

10 if interest rates=FALL then stock market=RISE

10 if interest rates=FALL then stock market=RISE 20 if interest rates=RISE then stock market=FALL 30 if dollar exchange rate=FALL then interest rates=RISE 40 if dollar exchange rate=RISE then interest rates=FALL 50 if fedint=FALL AND FEDMON=ADD then inerest rates=FALL.

lester-shaw
Download Presentation

10 if interest rates=FALL then stock market=RISE

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 10 if interest rates=FALL then stock market=RISE 20 if interest rates=RISE then stock market=FALL 30 if dollar exchange rate=FALL then interest rates=RISE 40 if dollar exchange rate=RISE then interest rates=FALL 50 if fedint=FALL AND FEDMON=ADD then inerest rates=FALL dollar exchange rate=FALL R30 interestrate=RISE R20 stock market=FALL

  2. 10 if interest=FALL then stock=RISE 20 if interest=RISE then stock market=FALL 30 if dollar=FALL then interest=RISE 40 if dollar=RISE then interest=FALL 50 if fedint=FALL AND FEDMON=ADD then inerest =FALL 1 interest 2 3 4 5 interest 6 7 8 9 dollar 10 11 12 13 dollar 14 15 16 17 fedint 18 fedmon forward chaining… ?dollar=rise I NI value interest dollar fedint fedmon stock variable list knowledge base clause variable list rule no clause no clause variable pointer conclusion variable queue

  3. 10 if interest=FALL then stock=RISE 20 if interest=RISE then stock market=FALL 30 if dollar=FALL then interest=RISE 40 if dollar=RISE then interest=FALL 50 if fedint=FALL AND FEDMON=ADD then inerest =FALL 1 interest 2 3 4 5 interest 6 7 8 9 dollar 10 11 12 13 dollar 14 15 16 17 fedint 18 fedmon forward chaining… ?dollar=rise I NI value interest dollar fedint fedmon stock Rise I variable list knowledge base clause variable list interest 1 40 rule no clause no 13 clause variable pointer conclusion variable queue

  4. 10 if interest=FALL then stock=RISE 20 if interest=RISE then stock market=FALL 30 if dollar=FALL then interest=RISE 40 if dollar=RISE then interest=FALL 50 if fedint=FALL AND FEDMON=ADD then inerest =FALL 1 interest 2 3 4 5 interest 6 7 8 9 dollar 10 11 12 13 dollar 14 15 16 17 fedint 18 fedmon forward chaining… ?dollar=rise I NI value Fall interest dollar fedint fedmon stock I Rise I I Rise variable list knowledge base clause variable list stock 1 10 rule no clause no 1 clause variable pointer conclusion variable queue

  5. Decision nodes Backward Chaining less than 2 years Do not offer applicant a position 9 Average less than 3.5 How many years experience does applicant have? 7 Do not offer applicant a position 2 No Offer applicant a position in service engineering 10  2 Does applicant have a degree? 1 applicant possibly qualifies for a position 3 What’s applicant’s overall average? 5 Yes Yes average  3.5 Did applicant make an important discovery? 4 Offer applicant a position in product engineering 8 Offer applicant a position in research 6 Yes Yes

  6. Goals (conclusions) Subconclusion Backward Chaining less than 2 years Do not offer applicant a position 9 Average less than 3.5 How many years experience does applicant have? 7 Do not offer applicant a position 2 No Offer applicant a position in service engineering 10  2 Does applicant have a degree? 1 applicant possibly qualifies for a position 3 What’s applicant’s overall average? 5 Yes Yes average  3.5 Did applicant make an important discovery? 4 Offer applicant a position in product engineering 8 Offer applicant a position in research 6 Yes Yes

  7. Variable Conditions IF part Backward Chaining less than 2 years Do not offer applicant a position 9 Average less than 3.5 How many years experience does applicant have? 7 Do not offer applicant a position 2 No Offer applicant a position in service engineering 10  2 Does applicant have a degree? 1 applicant possibly qualifies for a position 3 What’s applicant’s overall average? 5 Yes Yes average  3.5 Did applicant make an important discovery? 4 Offer applicant a position in product engineering 8 Offer applicant a position in research 6 Yes Yes

  8. Backward Chaining…Creating a knowledge base (conversion to IF-THEN rules) No IF applicant has a degree = yes, THEN applicant possibly qualifies for a position = yes Does applicant have a degree? 1 applicant possibly qualifies for a position 3 Yes

  9. Backward Chaining…Creating a knowledge base (conversion to IF-THEN rules) • Choose a conclusion node of the decision tree. Record it. • Choose a decision node with a connecting branch to the left of the node you chose in step 1. Record that node • Continue doing step 2 until either there are no more nodes to the left or until a conclusion node is reached. If a conclusion node is reached record it and stop. IF there are no more nodes, stop. • Each decision node in the path is the variable part of an IF clause. The value associated with the branch is the condition. All connected clauses use the logical AND. • The conclusion becomes the THEN part

  10. Backward Chaining…Creating a knowledge base (conversion to IF-THEN rules) conclusion IF DEGREE = YES AND DISCOVERY = YES THEN POSITION = RESEARCH Did applicant make an important discovery? 4 Does applicant have a degree? 1 Offer applicant a position in research 6 Yes Yes

More Related