Difference between revisions of "Epoch"
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Depending on context, '''epoch''' can refer to: | Depending on context, '''epoch''' can refer to: | ||
==Period of time== | ==Period of time== | ||
| − | * a distinctive [[historical | + | * a distinctive [[historical]] period or era |
| − | * a unit of the [[geologic | + | * a [[unit]] of the [[Geologic Timescale|geologic timescale]], less than a period and greater than an age |
| − | * a phase in the [ | + | * a [[phase]] in the [http://institute.daynal.org/archives/extended_reference/cosmology/tufts.html development of the universe] with distinctive properties |
==Moment in time== | ==Moment in time== | ||
| − | An '''Epoch''' signifies a significant event, time, or moment which is chosen as a new [[origin]] for time measurements, usually as the delimiting factor of an [[era]]: | + | An '''Epoch''' signifies a significant [[event]], [[time]], or [[moment]] which is chosen as a new [[origin]] for time [[measurements]], usually as the delimiting factor of an [[Milieu|era]]: |
| − | * References to such may include | + | * [[References]] to such may include Epochal date, Epochal [[event]], Epochal [[moment]] |
| − | + | * epoch (astronomy, and Epochal moment regard a precise moment in time for which [[celestial]] coordinates or [[orbital]] elements are specified. | |
| − | * | ||
===Time benchmark in Computing=== | ===Time benchmark in Computing=== | ||
| − | * a step in the training process of an [[artificial neural network]]. | + | * a step in the [[training]] [[process]] of an [[artificial]] [[neural network]]. |
| − | * | + | * Unix epoch] |
| − | + | [[Category: History]] | |
| − | + | [[Category: General Reference]] | |
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Revision as of 14:14, 21 March 2010
Depending on context, epoch can refer to:
Period of time
- a distinctive historical period or era
- a unit of the geologic timescale, less than a period and greater than an age
- a phase in the development of the universe with distinctive properties
Moment in time
An Epoch signifies a significant event, time, or moment which is chosen as a new origin for time measurements, usually as the delimiting factor of an era:
- References to such may include Epochal date, Epochal event, Epochal moment
- epoch (astronomy, and Epochal moment regard a precise moment in time for which celestial coordinates or orbital elements are specified.
Time benchmark in Computing
- a step in the training process of an artificial neural network.
- Unix epoch]
