Terms that are on use on this site.
There are 493 entries in this glossary.D
| Term | Definition |
|---|---|
| D/A |
Converter Short for digital-to-analog converter. This is a device that
changes a digitally coded word into its equivalent quantized analog
voltage or current. Just like the A/D device, there are very high-speed
D/A's available, capable of converting at data rates up to 1 GHz. |
| Dark factory |
A completely automated factory floor with no labour. |
| Data |
all information of computer operations directed by the detailed instructions of the program. |
| Data acquisition system |
any instrument or computer that acquires data from sensors via
amplifiers, multiplexers, and any necessary analog to digital
converters. |
| Data collection |
the act of bringing data from remote points to a central location, and its organization into understandable information. |
| Data element |
A single, atomic piece of data that cannot be subdivided and still retain any meaning. The terms "data item" and "field" are often used synonymously with data element. |
| Data Management |
The process by which the reliability, timeliness and accessibility of an organization??s data base is assured. |
| Data space |
where data reside. |
| Data warehouse |
A database for query and analysis, as opposed to a database for processing transactions. Separating the two functions improves flexibility and performance. |
| Database |
a collection of structured information. |
| dB (Decibel) |
20 times the log to the base 10 of the ratio of two voltages. Every 20 dBs correspond to a voltage ratio of 10, every 10 dBs to a voltage ratio of 3.162. For instance, a CMR of 120 dB provides voltage noise rejection of 1,000,000/1. An NMR of 70 dB provides voltage noise rejection of 3,162/1. |
| DBMS |
Database Management Systems access data stored in a database and
present multiple data views to end users and application programmers. |
| DC |
Direct current; an electric current flowing in one direction only and substantially constant in value. |
| DCOM |
Distributed COM |
| DCS |
Distributed Control System is a real-time control system for continuous and batch process applications. |
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