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Dwell Time (filtration)
Dwell time may refer to: * Dwell time (filtration), the time a fluid remains in contact with an active filter medium. * Dwell time (GNSS) * Dwell time (information retrieval), the time a user remains at a search result after a click * Dwell time (military), the time personnel spend in home station between deployments * Dwell time (radar), the time that an antenna beam spends on a target * Dwell time (transportation), the time a vehicle spends at a scheduled stop without moving * Service time, in queueing theory {{Disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dwell Time (filtration)
Dwell time may refer to: * Dwell time (filtration), the time a fluid remains in contact with an active filter medium. * Dwell time (GNSS) * Dwell time (information retrieval), the time a user remains at a search result after a click * Dwell time (military), the time personnel spend in home station between deployments * Dwell time (radar), the time that an antenna beam spends on a target * Dwell time (transportation), the time a vehicle spends at a scheduled stop without moving * Service time, in queueing theory {{Disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dwell Time (GNSS)
The dwell time in GNSS is the time required to test for the presence of a satellite signal for a certain combination of parameters. A search process detects whether a GNSS satellite is present or not in an area of the sky, based on correlation of a received signal with a reference signal stored in the receiver. The dwell times are associated with the performance of a certain detector A sensor is a device that produces an output signal for the purpose of sensing a physical phenomenon. In the broadest definition, a sensor is a device, module, machine, or subsystem that detects events or changes in its environment and sends .... They can be classified into single dwell times, when the decision is taken in one step, and multiple dwell times,Lohan2004 when the decision is taken in two or more steps. References Works cited * N. Couronneau, P.J. Duffett-Smith, and A. Mitelman, Calculating Time-to-First-Fix, GPS World, Nov 2011 (GPS World 2011) * E.S. Lohan, A. Lakhzouri, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dwell Time (information Retrieval)
In information retrieval, dwell time denotes the time which a user spends viewing a document after clicking a link on a search engine results page (SERP). Dwell time is the duration between when a user clicks on a search engine result, and when the user returns from that result, or is otherwise seen to have left the result. It is a relevance indicator of the search result correctly satisfying the intent of the user. Short dwell times indicate the user's query intent was not satisfied by viewing the result. Long dwell times indicate the user's query intent was satisfied. Google Google LLC () is an American Multinational corporation, multinational technology company focusing on Search Engine, search engine technology, online advertising, cloud computing, software, computer software, quantum computing, e-commerce, ar ... has used dwell time in page ranking. References Information retrieval evaluation Internet search engines {{web-software-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dwell Time (military)
In the military, dwell time is the amount of time that service members spend in their home station between deployments to war zones. It is used to calculate the deploy-to-dwell ratio. Dwell time is designed to allow service members a mental and physical break from combat and to give them time with their families. It is an important component of long term military readiness. History From the early days of the Global War on Terrorism until 2011, dwell time for American service members was reduced to a maximum of 12 months for most service members, increasing the deploy-to-dwell ratio to over 1:1 (15 months vs 12 months). "Dwell time at home stations became nothing more than getting ready for the next deployment." In October, 2011, the United States Department of Defense The United States Department of Defense (DoD, USDOD or DOD) is an executive branch department of the federal government charged with coordinating and supervising all agencies and functions of the government di ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dwell Time (radar)
Dwell time (''TD'') in surveillance radar Radar is a detection system that uses radio waves to determine the distance (''ranging''), angle, and radial velocity of objects relative to the site. It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, w ... is the time that an antenna beam spends on a target. The dwell time of a 2D–search radar depends predominantly on * the antenna's horizontal beam width ''θAZ'', and * the turn speed ''n'' of the antenna (in rotations per minute or rpm, i.e. 360 degrees in 60 seconds = multiplied by a factor of 6). Dwell time is calculated by: :T_D = \frac \quad\quad \text References {{CC-notice , cc=bysa3 , url=http://www.radartutorial.eu/01.basics/Dwell%20Time%20and%20Hits%20per%20Scan.en.html , author(s)=Christian Wolff Radar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dwell Time (transportation)
In transportation, dwell time or terminal dwell time refers to the time a vehicle such as a public transit bus or train spends at a scheduled stop without moving. Typically, this time is spent boarding or deboarding passengers, but it may also be spent waiting for traffic ahead to clear, trying to merge into parallel traffic, or idling time in order to get back on schedule. Dwell time is one common measure of efficiency in public transport, with shorter dwell times being universally desirable. Rail systems Dwell times are particularly important for a rail system. Rail headways increase where the dwell times are high. Dwell times are an important focus for rail systems; a reduction in a dwell time can often result in a reduced headway. Passengers who want to board and alight from a train need time to do so. Almost always passengers disembark first, and then passengers waiting on a platform board. A variety of different factors determine how long this takes, including the size of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
