block signal system
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block signal — noun also block signal system : a fixed signal at the entrance of a block to govern railroad trains entering and using that block compare block system 2 * * * block signaling. a fixed railroad signal governing the movements of trains entering and … Useful english dictionary
Block signal — (Railroads) One of the danger signals or safety signals which guide the movement of trains in a block system. The signal is often so coupled with a switch that act of opening or closing the switch operates the signal also. [Webster 1913 Suppl.] … The Collaborative International Dictionary of English
Automatic Block Signal — Basic Automatic Block Signals = Automatic Block Signal, or ABS, systems consist of a series of signals that govern blocks of track between the signals. The signals are automatically activated by the conditions of the block beyond the signal.… … Wikipedia
Signal (computing) — A signal is a limited form of inter process communication used in Unix, Unix like, and other POSIX compliant operating systems. Essentially it is an asynchronous notification sent to a process in order to notify it of an event that occurred. When … Wikipedia
Block (telecommunications) — In telecommunications a block is one of: * A group of bits or digits that is transmitted as a unit and that may be encoded for error control purposes. * A string of records, words, or characters, that for technical or logical purposes are treated … Wikipedia
Block matrix pseudoinverse — is a formula of pseudoinverse of a partitioned matrix. This is useful for decomposing or approximating many algorithms updating parameters in signal processing, which are based on least squares method. Derivation Consider a column wise… … Wikipedia
Signal passed at danger — (SPAD), in railway terminology, describes an event where a train has run beyond its allocated signal block without authority, as indicated by a lineside signal showing danger (typically a red light). It is a term primarily used within the British … Wikipedia
Block-ZF-Verteilung — LNB zerlegt mit zwei ZF Ausgängen in Satblock Technik. (Integrierter Multischalter) Eine Satblock Verteilung ist eine häufig eingesetzte Variante der Gebäudeverkabelung, bei der eine Rundfunkempfangsanlage den Gemeinschaftsbetrieb mehrerer… … Deutsch Wikipedia
Signal-flow graph — A signal flow graph (SFG) is a special type of block diagram[1] and directed graph consisting of nodes and branches. Its nodes are the variables of a set of linear algebraic relations. An SFG can only represent multiplications and additions.… … Wikipedia
Signal box — A signal box or signal cabin is a building from which railway signals and points are controlled. The term signal cabin is used in Ireland, parts of Scotland and in Australia while in North America, the term interlocking tower predominates.… … Wikipedia
