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Orders of magnitude (time) An order of magnitude of time is usually a decimal prefix or decimal order-of-magnitude quantity together with a base unit of time, like a microsecond or a million years. In some cases, the order of magnitude may be implied (usually 1), like a "second" or "year". In other cases, the quantity name implies the base unit ...
Example of a single industrial control loop; showing continuously modulated control of process flow. Piping and instrumentation diagram of pump with storage tank.
Characteristic impedance A transmission line drawn as two black wires. At a distance x into the line, there is current phasor I (x) traveling through each wire, and there is a voltage difference phasor V (x) between the wires (bottom voltage minus top voltage). If is the characteristic impedance of the line, then for a wave moving rightward, or for a wave moving leftward. Schematic ...
Several signals (Zs 1, Zs 6, Zs 7 and Zs 8) were introduced to speed up operation; they replace written orders which take some time, even if transmitted by telephone or train radio (they are written down as heard, and read back, awaiting confirmation).
In open-loop control, the control action from the controller is independent of the "process output" (or "controlled process variable"). A good example of this is a central heating boiler controlled only by a timer, so that heat is applied for a constant time, regardless of the temperature of the building.
An example of a formal specification (in Spanish) using the Z notation, with named schema boxes, including declarations and predicates. The Z notation / ˈzɛd / is a formal specification language used for describing and modelling computing systems. [1] It is targeted at the clear specification of computer programs and computer-based systems in ...
In astronomy, a syzygy (/ ˈsɪzədʒi / SIZ-ə-jee; from Ancient Greek συζυγία (suzugía) 'union, yoke') [1] is a roughly straight-line configuration of three or more celestial bodies in a gravitational system. [2] The word is often used in reference to the Sun, Earth, and either the Moon or a planet, where the latter is in conjunction ...
In computing, tar is a computer software utility for collecting many files into one archive file, often referred to as a tarball, for distribution or backup purposes. The name is derived from "tape archive", as it was originally developed to write data to sequential I/O devices with no file system of their own, such as devices that use magnetic tape. The archive data sets created by tar ...