5. Пример использования системы

Рассмотрим пример построения ЭС по выбору мобильного телефона. ЭС позволяет получить несколько результатов запроса, в разной степени удовлетворяющих условиям, задаваемым пользователем. Определяются компромиссные варианты, используя механизмы обработки весов получаемых ответов на некое количество «наводящих» вопросов. Тип обработки и вес каждого ответа заданы с учетом особенностей темы, с которой работает система, и позволяют подбирать наиболее адекватные варианты ответов.

Для вычисления степени удовлетворения условиям использована схема сложения вероятностей независимых событий с ранжированием от –100 до +100. Поскольку разные вопросы могут иметь большее или меньшее значение при выборе телефона, то ответы на вопросы отличаются по весу. Помимо этого, модели, обладающие более редкими характеристиками, при их выборе получают несколько большую вероятность. Варианты, не набравшие 60/100, отбрасываются.

В табл. 2.1 приведен список квалификатор и некоторые из правил, описывающие действия системы при выбранных пользователем условиях.

Таблица 2.1

Квалификаторы	Некоторые из правил
Qualifier #1 Select the price range for your telephone? not more than $130 $130-$200 $200-$300 $300-$400 more $400	RULE NUMBER: 1 IF: Select the price range for your telephone? Not more than $130 THEN: Alcatel One Touch Club – Probability=50/100 and Ericsson T10s – Probability=50/100 and Ericsson A1018s – Probability=50/100 and Motorola CD 930 – Probability=50/100 and Siemens A35 – Probability=50/100 and – Probability=50/100
Qualifier #2 Select the size for you telephone? not more then 110mm 110-120mm more 120mm	RULE NUMBER: 8 IF: Select the size for you telephone? more 120mm THEN: Alcatel one Touch Club – Probability=20/100 and Ericsson A1018s – Probability=20/100 and Motorola CD 930 – Probability=20/100 and Motorola L7089 – Probability=20/100 and Motorola Timeport 250 – Probability=20/100 and Nokia 3210 – Probability=20/100 and Nokia 6250 – Probability=20/100 and Nokia 7110 – Probability=20/100 and Panasonic GD93 – Probability=20/100
Qualifier #3 Weight? not more then 90g 90-140g more 140g	RULE NUMBER: 11 IF: Weight? more 140g THEN: Alcatel one Touch Club – Probability=20/100 and Ericsson T10s – Probability=20/100 and Ericsson T18s – Probability=20/100 and Motorola CD 930 – Probability=20/100 and Nokia 3210 – Probability=20/100 and Nokia 6250 – Probability=20/100 and Nokia 7110 – Probability=20/100 and Ericsson A1018s – Probability=20/100
Qualifier #4 The work time in standby mode? near 5 days 5-10 days more 10 days	RULE NUMBER: 14 IF: The work time in standby mode? more 10 days THEN: Nokia 3210 – Probability=40/100 and Nokia 3310 – Probability=40/100 and Nokia 6250 – Probability=40/100 and Nokia 7110 – Probability=40/100
Qualifier #5 Call duration? 3-4 hour 4-5 hour 5-6 hour more 6 hour	RULE NUMBER: 18 IF: Call duration? more 6 hour THEN: Ericsson T20s – Probability=50/100 and Nokia 3310 – Probability=20/100 and Siemens S35i – Probability=20/100 and Siemens SL45 – Probability=20/100
Qualifier #6 Antenna? out-antenna a built-in antenna	RULE NUMBER: 20 IF: Antenna? a built-in antenna THEN: Nokia 3210 – Probability=10/100 and Nokia 3310 – Probability=10/100 and Nokia 6250 – Probability=10/100 and Nokia 8210 – Probability=10/100 and Nokia 8850 – Probability=10/100 and Siemens M35i – Probability=10/100 and Siemens S35i – Probability=10/100 and Siemens SL45 – Probability=10/100
Qualifier #7 Flip? No N/active Active	RULE NUMBER: 22 IF: Flip? N/active THEN: Ericsson T10s – Probability=25/100 and Samsung SGH N100 – Probability=25/100
Qualifier #8 Alarm? Yes No	RULE NUMBER: 25 IF: Alarm? No THEN: Siemens A35 – Probability=15/100 and Siemens C25 – Probability=15/100
Qualifier #9 Vibro? Yes No	RULE NUMBER: 27 IF: Vibro? No THEN: Alcatel One Touch 300 and – Probability=5/100 and Alcatel One Touch Club – Probability=5/100 and Benefon Twin+ – Probability=5/100 and Ericsson A1018s – Probability=5/100 and Nokia 3210 – Probability=5/100 and Bosh GSM 909 Dual S – Probability=5/100 and Siemens A35 – Probability=5/100 and Siemens C25 – Probability=5/100
Qualifier #10 Calculator? Yes No	RULE NUMBER: 29 IF: Calculator? No THEN: Alcatel One Touch 300 and – Probability=10/100 and Ericsson A1018s – Probability=10/100 and Motorola CD 930 – Probability=10/100 and Siemens A35 – Probability=10/100 and Siemens C25 – Probability=10/100
Qualifier #11 Speaker phone? Yes No	RULE NUMBER: 30 IF: Speaker phone? Yes THEN: Ericsson T18s – Probability=10/100 and Ericsson A20s – Probability=10/100 and Panasonic GD90 – Probability=10/100 and Panasonic GD92 – Probability=10/100 and Panasonic GD93 – Probability=10/100 and Siemens SL45 – Probability=10/100
Qualifier #12 Voice dialing? Yes No	RULE NUMBER: 32 IF: Voice dialing? Yes THEN: Ericsson T18s – Probability=15/100 and Ericsson T20s – Probability=15/100 and Motorola L7089 – Probability=15/100 and Nokia 3310 – Probability=15/100 and Nokia 3310 – Probability=15/100 and Samsung SGH A100 – Probability=15/100 and Siemens S35i – Probability=15/100 and Siemens SL45 – Probability=15/100 and Nokia 8210 – Probability=15/100 and Nokia 8850 – Probability=15/100 and Ericsson T28s – Probability=15/100
Qualifier #13 IR-port? Yes No	RULE NUMBER: 34 IF: IR-port? Yes THEN: Motorola L7089 – Probability=40/100 and Motorola Timeport 250 – Probability=40/100 and Nokia 6250 – Probability=40/100 and Nokia 7110 – Probability=40/100 and Nokia 8850 – Probability=40/100 and Nokia 8210 – Probability=40/100 and Siemens SGH A100 – Probability=40/100 and Siemens S35i – Probability=40/100 and Siemens SL45 – Probability=40/100
Qualifier #14 WAP? Yes No	RULE NUMBER: 36 IF: WAP? Yes THEN: Benefon Q – Probability=30/100 and Ericsson T20s – Probability=30/100 and Motorola Timeport 250 – Probability=30/100 and Nokia 6250 – Probability=30/100 and Nokia 7110 – Probability=30/100 and Panasonic GD93 – Probability=30/100 and Samsung SGH N100 – Probability=30/100 and Siemens M35i – Probability=30/100 and Siemens S35i – Probability=30/100 and Siemens SL45 – Probability=30/100
Qualifier #15 Display? less 4 str 4 str 5 str more 5 str	RULE NUMBER: 41 IF: Display? more 5 str THEN: Benefon Q – Probability=20/100 and Nokia 7110 – Probability=30/100 and Nokia 8850 – Probability=30/100 and Panasonic GD92 – Probability=30/100 and Siemens S35i – Probability=30/100 and Siemens SL45 – Probability=30/100

Пример работы с системой

1. Select the price range for your telephone? not more than $130

2. Select the size for you telephone? 110-120mm

3. Weight? more 140g

4. The work time in standby mode? near 5 days

5. Call duration? 4-5 hour

6. Antenna? out-antenna

7. Flip? No

8. Alarm? No

9. Vibro? No

10. Calculator? No

11. Speaker phone? No

12. Voice dialing? No

13. IR-port? No

14. WAP? No

15. Display? less 4 str

Результат:

1. Siemens C25 93

2. Siemens A35 91

3. Ericsson A1018s 82

4. Motorola CD 930 79

5. Alcatel One Touch Club 73

6. Ericsson T10s 73

7. Nokia 3310 71

8. Benefon Twin+ 70

9. Bosh GSM 909 Dual S 70