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Specific applications of search algorithms include: Problems in combinatorial optimization, such as: . The vehicle routing problem, a form of shortest path problem; The knapsack problem: Given a set of items, each with a weight and a value, determine the number of each item to include in a collection so that the total weight is less than or equal to a given limit and the total value is as ...
Most search engines employ methods to rank the results to provide the "best" results first. How a search engine decides which pages are the best matches, and what order the results should be shown in, varies widely from one engine to another. [35] The methods also change over time as Internet usage changes and new techniques evolve.
In the context of search engines, query expansion involves evaluating a user's input (what words were typed into the search query area, and sometimes other types of data) and expanding the search query to match additional documents. Query expansion involves techniques such as: Finding synonyms of words, and searching for the synonyms as well
Online search is the process of interactively searching for and retrieving requested information via a computer from databases that are online. [1] Interactive searches became possible in the 1980s with the advent of faster databases and smart terminals. [ 1 ]
Ranking of query is one of the fundamental problems in information retrieval (IR), [1] the scientific/engineering discipline behind search engines. [2] Given a query q and a collection D of documents that match the query, the problem is to rank, that is, sort, the documents in D according to some criterion so that the "best" results appear early in the result list displayed to the user.
Tips to help your search: • Select your search terms carefully. Use specific, descriptive words instead of general ones. For example, searching for blueberry pancake recipes instead of recipes increases your chances of finding blueberry pancake recipes. • To find an exact phrase, put quote marks around your search terms.
This example of the Pareto principle (or 80–20 rule) allows search engines to employ optimization techniques such as index or database partitioning, caching and pre-fetching. In addition, studies have been conducted into linguistically-oriented attributes that can recognize if a web query is navigational, informational or transactional.
AOL offers a large variety of searching, navigating and reading features that make it easier to digest info and news. There are different customization features, searching tips and ways to access information that you need to know about to maximize your ability to find the info you want or need. Navigate features