Web search engines have stored in their logs information about users since they started to
operate. This information often serves many purposes. The primary focus of this survey is on …

Web search providers often include search services for domain-specific subcollections,
called verticals, such as news, images, videos, job postings, company summaries, and artist …

Search engines rely on searching multiple partitioned corpora to return results to users in a
reasonable amount of time. In this paper we analyze the standard two-tier architecture for …

Server selection is an important subproblem in distributed information retrieval (DIR) but has
commonly been studied with collections of more or less uniform size and with more or less …

Metasearch is to utilize multiple other search systems (called component search systems) to
perform simultaneous search. A metasearch engine is a search system that enables …

In order to objectively evaluate the traffic safety performance of intersection, this study puts
forward an intersection safety evaluation model based on BN which treats the expertspsila …

Source selection deals with the problem of selecting the most appropriate information
sources from the set of, usually non-intersecting, available document collections. On the …

A peer-to-peer server network system consists of a large number of autonomous servers
logically connected in a peer-to-peer way where each server maintains a collection of …

The centralized web search paradigm introduces several problems, such as large data traffic
requirements for crawling, index freshness problems and problems to index everything. In …

Resource selection, also called server selection, collection selection or database selection,
is a foundational problem in distributed information retrieval (DIR). This paper introduces a …