Keywords: Information Retrieval; optimization; Accelerated particle swarm intelligence algorithm; Bat algorithm; Query Expansion I. OBJECTIVE The objective of this paper is to compare various optimization algorithms in information retrieval domain. The researchers have used various optimization algorithms to solve the problems for information retrieval. Here we have studied various information retrieval optimization algorithms. Different algorithms have been implemented on different sets of databases like MEDLINE database, Web database etc. We are comparing these algorithms based on effectiveness.
II. INTRODUCTION A. Information RetrievalDuring the last decade the information over the web have increased and optimization of information retrieval effectiveness has driven the quality of the results over the web, People are more trusting and preferring web search as a source of information. Information retrieval has come out of academic discipline to become the basis of most preferred and reliable source of information. The field of information retrieval began with scientific library records and scientific publications; it spread rapidly in other domains like journalism, lawyers and medical fields. Information retrieval then spread in web information access. The information retrieval provides solution in finding relevant information in unstructured information [5].
B. Optimization (Swarm Intelligence)The researchers have used number of optimization technique in information retrieval domain. There are various models of IR and methods for optimization. Here we are concentrating on one of stochastic optimization technique called swarm intelligence. Swarm intelligence is the study of computational systems inspired by the 'collective intelligence'. Collective Intelligence emerges through the working together of large numbers of similar agents in the environment. Schools of fish, flocks of birds, and colonies of ants are some the examples. The property of swarm intelligence is self-organization, decentralization and distribution throughout the environment. The problems are solved in nature like foraging for food, prey evading, and colony relocation through SI. The information is stored and transferred by the means of agents such as proximity in fish and birds, pheromones in ants and dancing in bees [1] [6].