“persistence”的概念、定义、翻译、参考文献-科学参考

persistence

Computer

The property of data that continues to exist after a process accessing it has finished. The term is usually used for data that is preserved when the computer is switched off, and when the notation for accessing it is substantially the same as for other data. Persistence shows that the existence of a data item is distinct from its accessibility, which is determined by the scope of its declaration. By implication, persistent data is preserved in backing store, and special techniques are often needed to store and access the data values and to mark their creation and destruction.

Electronics and Electrical Engineering

1. The time interval after excitation during which a phosphor continues to emit light (see luminescence), particularly the phosphor on the screen of a cathode-ray tube. The magnitude of the luminance with respect to time after excitation of a luminescent screen is a persistence characteristic. The persistence depends on the nature of the phosphor and for luminescent screens is commonly chosen to be less than the persistence of the image on the human retina (about 0.1 seconds); it can however vary from fractions of a second to several years.
2. A faint luminosity observed after the passage of an electric discharge through certain gases; it can last for several seconds.

Geology and Earth Sciences

Continuation of an anomaly beyond its expected limits in time or space.

Geography

The persistence of a landform varies with the magnitude and recurrence interval of the event which brought it about. Calver and Anderson (2004, TIBG 29, 1) suggest the terms static persistence where ‘spatial positioning is constant, [and there is] virtually no change in the feature over time’, and dynamic persistence where ‘the type of feature remains in evidence…but individual representations are formed and/or degrade’. See also Wilcock and Iverson, eds (2003) Geophys. Monog. Ser. 135.

Economics

In times series analysis, the presence of strong serial correlation, or autocorrelation.

单词	persistence
释义	persistence Computer The property of data that continues to exist after a process accessing it has finished. The term is usually used for data that is preserved when the computer is switched off, and when the notation for accessing it is substantially the same as for other data. Persistence shows that the existence of a data item is distinct from its accessibility, which is determined by the scope of its declaration. By implication, persistent data is preserved in backing store, and special techniques are often needed to store and access the data values and to mark their creation and destruction. Electronics and Electrical Engineering 1. The time interval after excitation during which a phosphor continues to emit light (see luminescence), particularly the phosphor on the screen of a cathode-ray tube. The magnitude of the luminance with respect to time after excitation of a luminescent screen is a persistence characteristic. The persistence depends on the nature of the phosphor and for luminescent screens is commonly chosen to be less than the persistence of the image on the human retina (about 0.1 seconds); it can however vary from fractions of a second to several years. 2. A faint luminosity observed after the passage of an electric discharge through certain gases; it can last for several seconds. Geology and Earth Sciences Continuation of an anomaly beyond its expected limits in time or space. Geography The persistence of a landform varies with the magnitude and recurrence interval of the event which brought it about. Calver and Anderson (2004, TIBG 29, 1) suggest the terms static persistence where ‘spatial positioning is constant, [and there is] virtually no change in the feature over time’, and dynamic persistence where ‘the type of feature remains in evidence…but individual representations are formed and/or degrade’. See also Wilcock and Iverson, eds (2003) Geophys. Monog. Ser. 135. Economics In times series analysis, the presence of strong serial correlation, or autocorrelation.
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