| 词汇 | emissivity |
| 释义 | emissivity noun[ U ] physics specializeduk /ˌem.ɪˈsɪv.ə.ti/ us /ˌem.əˈsɪv.ə.t̬i/ the ability of an object to emit(= send out) heat, compared to the heat emitted by a black object of the same temperature : 发射率 This machine measures the emissivity of the surface of Venus.这台机器测量金星表面的发射率。 These new houses offer residents energy-saving amenities such as low emissivity glass windows. Related word emit Low emissivity glass reflects interior heat back into the room. The amount of radiation emitted is partly determined by the emissivity of the material. This sensor is used to measure emissivity. The metal was painted black to enhance its emissivity. Emitting and ejecting carbon emissions discharge displace displaced eject ejection ejector emission expel expulsion exude give something off loose low emission zone send something out shed shedding spew toss unhoused Examples of emissivityemissivity Shown is the ratio of the total continuum emissivity and its maximum at 800 nm. In order to compare the results of these experiments to theoretical predictions of the hydrodynamic response, the target temperature, pressure, reflectivity, emissivity, and electrical conductivity have to be measured. The latter was calculated using values of emissivity for the tubes of 0-15 and for the wire of 0.095 which were obtained from property tables. Its list includes domestic heating controls, draught-proofing materials, loft insulation, cavity wall insulation, hot water tank jackets and low-emissivity glazing. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 This work has confirmed that low-emissivity glazing, used in conjunction with high performance framing systems, provides the potential for significant energy savings. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 The next improvement of the code will be to take into account the temporal integration, the emissivity in each cell and the saturation. The copper specimen was painted black on the sides to enhance its emissivity for the infrared thermograph study. The embedded energy of several sheets of glass and of low emissivity coatings needs to be examined. To properly contrast the calculations at different atom densities, we have divided each emissivity by the atom density and by the time of propagation. Newly formed dust also appears to have a higher value of emissivity than dust in the general interstellar medium. Recent observations using balloon-borne experiments have shown that the emissivity of dust appears to be a strong function of dust temperature and of gas density. In principle, an increase in temperature as well as an increase in pressure increases the emissivity over the total visible spectrum. Lower wall emissivity will increase the stopping potential. In the fourth section we extend the analysis to the parabolic case and to case of nonlinear material properties (temperature-dependent conductivity or emissivity). In this paper, several restrictions on geometry, topology, boundary conditions and emissivity coefficients have been removed. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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