| 单词 | thermal efficiencies |
| 释义 | thermal /thûrˈməl/adjective
ORIGIN: Fr thermal, from Gr thermē heat thermalizaˈtion or thermalisaˈtion noun therˈmalize or therˈmalise transitive verb To reduce the kinetic energy and speed of (fast neutrons) in a nuclear reactor intransitive verbTo undergo thermalization thermˈally adverb thermal agitation noun (physics) The random movements of free electrons in a conductor, caused by thermal energy and producing noise signals which may be noticeable in some circumstances thermal barrier noun Heat barrier thermal capacity noun (physics) The amount of heat required to raise the temperature of a system through one degree thermal conductivity noun (physics) A measure of the rate of flow of thermal energy through a material in the presence of a temperature gradient thermal conductor noun A material that allows the flow of heat through it by conduction thermal diffusion noun (physics) A process in which a temperature gradient in a mixture of fluids tends to establish a concentration gradient thermal dissociation noun The splitting of certain molecules into simpler molecules by heat, followed by recombination on cooling thermal efficiency noun (engineering) (of a heat engine) the ratio of the work done by the engine to the mechanical equivalent of the heat supplied in the steam or fuel thermal imaging noun The visualization of objects, substances, etc by detecting and processing the infrared energy they emit, used in medical thermography and to locate bodies underground thermal neutron noun (physics) A neutron of very low speed and hence very low energy, responsible for various types of nuclear reaction, incl fission thermal noise noun (electronics) Noise arising from random movements of electrons in conductors and semiconductors, limiting the sensitivity of electronic amplifiers and detectors thermal printer noun (computing) An old form of dot matrix printer using heated pins to fix images on heat-sensitive paper thermal reactor noun A nuclear reactor in which fission is induced mainly by low-energy neutrons thermal shock noun Stress, often resulting in fracture, occurring when a body is subjected to sudden changes in temperature thermal signature noun The characteristic appearance of a substance or object when viewed with thermal-imaging equipment thermal springs plural noun Natural springs of hot water |
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