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  2. Two-stroke engine - Wikipedia

    en.wikipedia.org/wiki/Two-stroke_engine

    Animation of a two-stroke engine. A two-stroke (or two-stroke cycle) engine is a type of internal combustion engine that completes a power cycle with two strokes of the piston (one up and one down movement) in one revolution of the crankshaft in contrast to a four-stroke engine which requires four strokes of the piston in two crankshaft revolutions to complete a power cycle.

  3. Two- and four-stroke engines - Wikipedia

    en.wikipedia.org/wiki/Two-_and_four-stroke_engines

    The M4+2 engine, also known as the double-piston internal combustion engine, is a type of internal combustion engine invented by Polish patent holder Piotr Mężyk. [1] The M4+2 engine took its name from a combination of two-stroke engines and four-stroke engines. The two-stroke combustion engine is characterized by a simple construction and ...

  4. Two-stroke power valve system - Wikipedia

    en.wikipedia.org/wiki/Two-stroke_power_valve_system

    A stroke is the action of a piston travelling the full length of its cylinder.In a two-stroke engine, one of the two strokes combines primarily the intake stroke and the combustion stroke, while the other stroke primarily combines the compression stroke and the exhaust stroke, though technically since both ports are exposed during both the combustion and compression strokes, some reversion ...

  5. Split-single engine - Wikipedia

    en.wikipedia.org/wiki/Split-single_engine

    An example of this arrangement was used on the 1953-1969 Puch 250 SGS. Early engines using a "side-by-side" layout (with the carburetor in the "normal" place behind the cylinder) had similar lubrication and pollution problems to conventional two-stroke engines of the era, however the revised designs after World War II addressed these problems.

  6. Text corpus - Wikipedia

    en.wikipedia.org/wiki/Text_corpus

    An example of annotating a corpus is part-of-speech tagging, or POS-tagging, in which information about each word's part of speech (verb, noun, adjective, etc.) is added to the corpus in the form of tags. Another example is indicating the lemma (base) form of each word. When the language of the corpus is not a working language of the ...

  7. List of text corpora - Wikipedia

    en.wikipedia.org/wiki/List_of_text_corpora

    The TenTen Corpus Family – comparable web corpora of target size 10 billion words. These corpora are available in the corpus management system Sketch Engine, currently, there exist TenTen corpora for more than 30 languages (such as English TenTen corpus, [38] Arabic TenTen corpus, [39] Spanish TenTen corpus, [40] Russian Tenten corpus, [41 ...

  8. Internal model (motor control) - Wikipedia

    en.wikipedia.org/wiki/Internal_model_(motor_control)

    In the subject area of control theory, an internal model is a process that simulates the response of the system in order to estimate the outcome of a system disturbance. The internal model principle was first articulated in 1976 by B. A. Francis and W. M. Wonham [1] as an explicit formulation of the Conant and Ashby good regulator theorem. [2]

  9. Bourke engine - Wikipedia

    en.wikipedia.org/wiki/Bourke_engine

    The Bourke engine was an attempt by Russell Bourke, in the 1920s, to improve the two-stroke internal combustion engine. Despite finishing his design and building several working engines, the onset of World War II , lack of test results, [ 1 ] and the poor health of his wife compounded to prevent his engine from ever coming successfully to market.