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English-Polish dictionary for engineers. 2013.
English-Polish dictionary for engineers. 2013.
Alternating current — (green curve). The horizontal axis measures time; the vertical, current or voltage. In alternating current (AC, also ac) the movement of electric charge periodically reverses direction. In direct current (DC, also dc), the flow of electric charge … Wikipedia
Alternating decision tree — An Alternating Decision Tree (ADTree) is a machine learning methodfor classification. The ADTree data structure and algorithmare a generalization of decision trees and have connections to boosting. ADTrees were introduced by Yoav Freund and Llew… … Wikipedia
Automorphisms of the symmetric and alternating groups — In group theory, a branch of mathematics, the automorphisms and outer automorphisms of the symmetric groups and alternating groups are both standard examples of these automorphisms, and objects of study in their own right, particularly the… … Wikipedia
History of electromagnetism — The history of electromagnetism, that is the human understanding and recorded use of electromagnetic forces, dates back over two thousand years ago, see Timeline of electromagnetism. The ancients must have been acquainted with the effects of… … Wikipedia
War of Currents — In the War of Currents era (sometimes, War of the Currents or Battle of Currents ) in the late 1880s, George Westinghouse and Thomas Edison became adversaries due to Edison s promotion of direct current (DC) for electric power distribution over… … Wikipedia
Electricity — (from the Greek word ήλεκτρον, (elektron), meaning amber, and finally from New Latin ēlectricus , amber like ) is a general term that encompasses a variety of phenomena resulting from the presence and flow of electric charge. These include many… … Wikipedia
Stephen Butterworth — (1885 1958) was a British physicist who invented the Butterworth filter [Stephen Butterworth (1930) On the theory of filter amplifiers, Experimental Wireless and the Wireless Engineer , vol. 7, pp. 536 541.] , a class of electrical circuits that… … Wikipedia
Determinant — This article is about determinants in mathematics. For determinants in epidemiology, see Risk factor. In linear algebra, the determinant is a value associated with a square matrix. It can be computed from the entries of the matrix by a specific… … Wikipedia
Invention of radio — Great Radio Controversy redirects here. For the album by the band Tesla, see The Great Radio Controversy. Contents 1 Physics of wireless signalling 2 Theory of electromagnetism … Wikipedia
Skew-symmetric graph — In graph theory, a branch of mathematics, a skew symmetric graph is a directed graph that is isomorphic to its own transpose graph, the graph formed by reversing all of its edges. The isomorphism is required to be an involution without any fixed… … Wikipedia
Electrotherapy (cosmetic) — Cosmetic Electrotherapy micro current machine together with a selection of electrodes, made by Silver Fox (China) Cosmetic electrotherapy is a range of beauty treatments that uses low electric currents passed through the skin to produce several… … Wikipedia