1. Information Retrieval Demo Program 1 組別 : 第一組 組員 : 陳文鏘 黃慶順 鄒修銘

2. Outline  Program Architecture  Platform  Indexing Method  Time & Space  Search Time

3. Program Architecture …. Documents Parser 1.Tokens 2.Stop words Stopwords.txt Stemming Pre- index DBMS (Inverted File) JSP Query Retrieve

4. Outline  Program Architecture  Platform  Indexing Method  Time & Space  Search Time

5. Platform  CPU : Intel Celeron 500  RAM: 448MB  OS: Windows 2000  Language: Java (JDK 1.3)  Web Server: Orion 1.5.2 A J2EE application server  DBMS:MSSQL 2000

6. Outline  Program Architecture  Platform  Indexing Method  Time & Space  Search Time

7. Indexing Method  Inverted File in DBMS Index termDoc. Number informationd2, d5, d11,d63… retrievald2, d5,d8,d14….. …… DBMS

8. Outline  Program Architecture  Platform  Indexing Method  Time & Space  Search Time

9. Time & Space  Building Time  12 hours and 54 mins  Building Space  original docs: 161 MB  inverted file in DBMS: 595 MB

10. Outline  Program Architecture  Platform  Indexing Method  Time & Space  Search Time

11. Search Time  Using Web interface (Java Servlet)  5~40 secs