MODERN INFORMATION RETRIEVAL

1. DESIGN, ANALYSIS AND IMPLEMENTATION OF AN INFORMATION RETRIEVAL SYSTEM (Enterprise Search) Using C++ and PHP Maheshwaran Janarthanan Narendran Hariparanthaman Team i Explore

9. Query Retrieved Results Corpus of Data Spell Checker and Auto Correction Indexer Redefined Barrels (Inverted Index) Query Processor MEGA INDEX BLOCK (Forward Index, File Meta Index, Positional Index, bi gram, N gram index, okapi++ indexes) Query Logs 3 Tier Architectural View of I Explore USER Data presentation layer PHP Data Processing layer C++ Data Storage layer MySQL, Flat files

12. Algorithm 1.Input the signals from the Input units to MCU 2.Input signals from nearby weapon system to MCU 3.Compare the input signals with standard data in memory 4.The required signals are given to the Tran receiver of weapon matrix 5.Selection of weapons 6.Angling of weapons 7.Calculation of time 8.Input from the timer given to the weapon

14. Spelling correction 1.Input the signals from the Input units to MCU 2.Input signals from nearby weapon system to MCU 3.Compare the input signals with standard data in memory 4.The required signals are given to the Tran receiver of weapon matrix 5.Selection of weapons 6.Angling of weapons 7.Calculation of time 8.Input from the timer given to the weapon

15. Performance Analysis Comparison of various models without Query Expansion techniques Execution time Statistics: Model MAP R Precision No of relevant docs returned P 5 P 10 Boolean 0.0773 0.1477 13 0.2 0.2 VSM 0.0587 0.0916 17 0.12 0.12 Okapi 0.1028 0.1536 25 0.22 0.18 Optimum (Okapi ++) 0.1769 0.2215 36 0.34 0.29 Model Metallica(sec) (for 10 queries) Boolean 14 VSM 16 Okapi 15 Optimum 15

16. Performance Analysis Okapi ++ with Cognizance algorithm : Disk space comparison: Query Expansion Technique MAP R precision No of relevant documents retrieved P 5 P 10 Title + description 0.2078 0.2517 42 0.4 0.33 Title + narration 0.2104 0.2555 47 0.42 0.34 Title + narration + description 0.2021 0.25 43 0.4 0.31 Index Size (in bytes) Positional Index 242, 109, 895 Variable block Index 139, 266, 798

19. Queries ? ? ?