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Dfr Px826
{{disambiguation ...
DFR may refer to: * Cosworth DFR, a 1987 race car engine * Dean Forest Railway, Gloucestershire, England * Decreasing failure rate * Deutscher Frauenring, a political advocacy organisation in Germany * Dihydroflavonol 4-reductase, an enzyme class * Divergence-from-randomness model, in information retrieval * Dounreay Fast Reactor, Scotland * Dual fluid reactor The Dual Fluid Reactor is a reactor concept of the Canadian company Dual Fluid Energy Inc. combining the advantages of the molten salt reactor with those of the liquid metal cooled reactor, it is supposed to reach the criteria for reactors of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cosworth DFR
The DFV is an internal combustion engine that was originally produced by Cosworth for Formula One motor racing. The name is an abbreviation of ''Double Four Valve'', the engine being a V8 development of the earlier four-cylinder FVA, which had four valves per cylinder. Its development in 1967 for Colin Chapman's Team Lotus was sponsored and funded by major American automotive manufacturer Ford. For many years it was the dominant engine in Formula One, with the whole engine program funded by Ford's European division, Ford Europe and engines badged as "Ford" for Formula One championship races. DFVs were widely available from the late 1960s to the mid 1980s and were used by every specialist team in F1 during this period with the exception of Ferrari, Alfa Romeo, Renault, BRM and Matra, who all designed, produced and ran their own engines. Variants of this engine were also used in other categories of racing, including CART, Formula 3000 and sports car racing. The engine is a 90°, 2, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dean Forest Railway
The Dean Forest Railway is a long heritage railway that runs between Lydney and Parkend in the Forest of Dean, Gloucestershire. The route was part of the former Severn and Wye Railway which ran from Lydney to Cinderford. The society that operates the line started steam locomotive operations in 1971, and bought the trackbed and line from British Rail in 1986, reaching Lydney Junction in 1995 and Parkend in 2005. Trains are operated by both steam and heritage diesel locomotives, and heritage diesel multiple units. The Dean Forest Railway has been given the former Griffithstown Station building. Its removal was completed in June 2016, and is expected to be placed at the new upcoming Speech House Road. CrossCountry are now providing a combined fare for travel to Lydney mainline station (on CrossCountry services only) and then onto the Dean Forest Railway. The Dean Forest Railway plans to extend its heritage services a further through/into the middle of the Royal Forest at Sp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Decreasing Failure Rate
Failure rate is the frequency with which an engineered system or component fails, expressed in failures per unit of time. It is usually denoted by the Greek letter λ (lambda) and is often used in reliability engineering. The failure rate of a system usually depends on time, with the rate varying over the life cycle of the system. For example, an automobile's failure rate in its fifth year of service may be many times greater than its failure rate during its first year of service. One does not expect to replace an exhaust pipe, overhaul the brakes, or have major transmission problems in a new vehicle. In practice, the mean time between failures (MTBF, 1/λ) is often reported instead of the failure rate. This is valid and useful if the failure rate may be assumed constant – often used for complex units / systems, electronics – and is a general agreement in some reliability standards (Military and Aerospace). It does in this case ''only'' relate to the flat region of the b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Deutscher Frauenring
Deutscher Frauenring e.V. (DFR) is a non-partisan political advocacy organisation and the leading women's organization in Germany, founded in 1949 in Bad Pyrmont to promote the interests of women in all areas of society. During the Cold War, it only existed in West Germany (including West Berlin). The association is a member of the International Alliance of Women, an NGO with general consultative status with the United Nations. It has state chapters in all 16 states, 40 local branches and around 50,000 members. It published the journal ''Grüne Reihe''. Deutscher Frauenring traditionally belongs to the movement often referred to as the "bourgeois-liberal" women's rights movement and thus stands in a broad and inclusive liberal feminist tradition. In modern times, Deutscher Frauenring takes an intersectional Intersectionality is an analytical framework for understanding how aspects of a person's social and political identities combine to create different modes of discrimin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dihydroflavonol 4-reductase
In enzymology, a dihydrokaempferol 4-reductase () is an enzyme that catalyzes the chemical reaction :cis-3,4-leucopelargonidin + NADP+ \rightleftharpoons (+)-dihydrokaempferol + NADPH + H+ Thus, the two substrates of this enzyme are cis-3,4-leucopelargonidin and NADP+, whereas its 3 products are (+)-dihydrokaempferol, NADPH, and H+. This enzyme belongs to the family of oxidoreductases, specifically those acting on the CH-OH group of donor with NAD+ or NADP+ as acceptor. The systematic name of this enzyme class is cis-3,4-leucopelargonidin:NADP+ 4-oxidoreductase. Other names in common use include dihydroflavanol 4-reductase (DFR), dihydromyricetin reductase, NADPH-dihydromyricetin reductase, and dihydroquercetin reductase. This enzyme participates in flavonoid biosynthesis. Function Anthocyanidins, common plant pigments, are further reduced by the enzyme dihydroflavonol 4-reductase (DFR) to the corresponding colorless leucoanthocyanidins. DFR uses dihydromyricetin ( am ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Divergence-from-randomness Model
In the field of information retrieval, divergence from randomness, one of the first models, is one type of probabilistic model. It is basically used to test the amount of information carried in the documents. It is based on Harter's 2-Poisson indexing-model. The 2-Poisson model has a hypothesis that the level of the documents is related to a set of documents which contains words occur relatively greater than the rest of the documents. It is not a 'model', but a framework for weighting terms using probabilistic methods, and it has a special relationship for term weighting based on notion of eliteness. Term weights are being treated as the standard of whether a specific word is in that set or not. Term weights are computed by measuring the divergence between a term distribution produced by a random process and the actual term distribution. Divergence from randomness models set up by instantiating the three main components of the framework: first selecting a basic randomness model, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dounreay Fast Reactor
Dounreay (; gd, Dùnrath) is a small settlement and the site of two large nuclear establishments on the north coast of Caithness in the Highland area of Scotland. It is on the A836 road west of Thurso. The nuclear establishments were created in the 1950s. They were the Nuclear Power Development Establishment (NPDE) for the development of civil fast breeder reactors, and the Vulcan Naval Reactor Test Establishment (NRTE), a military submarine reactor testing facility. Both these no longer perform their original research functions and will be completely decommissioned, some of which has been in progress for a while. The two establishments have been a major element in the economy of Thurso and Caithness, but this will decrease with the progress of decommissioning. The NPDE will enter an interim care and surveillance state by 2036, and become a brownfield site by 2336. An announcement in July 2020 that the Nuclear Decommissioning Authority (NDA) will be taking over direct ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
