The composition and generalized block diagram of the State Primary Standard of the unit of relative permittivity and unit of relative permeability in the frequency range 1 MHz – 18 GHz and methods of reproduction and transfer of the unit are considered. Measurement equations for all the standard ...
materials 智能材料nanoengineered materials 纳米材料工程 Metals are extremely good conductor of electricity and hear, and are not transparent to visible light：a polished metal surface has a lustrous appearance.金属是电和热的良导体,并且不能透过可见光:一个磨光的金属表面具有一个光泽的外形。
Dimensionless physical quantities represent a specific physical quantity. Consider using the physical quantitiesvelocity_factor,refractive_index,relative_permeability,strain,Reynolds_number, andlogical. Some of these physical quantities,strainandReynolds_number, have corresponding units. To specify units for the...
reduction in energy intensity and material use per unit of GDP (relative decoupling) and absolute declines of a few pollutants. daccess-ods.un.org 经合 组织的高收入国家略微减少了国内生产总值单位能源密集 程度和 材料 使用(相对 脱钩),并绝对减少了一些污染物。 daccess-ods.un.org Calculation ...
Apparatus for measuring the relative permeability of a core having a saturation measuring unit, and method for measuring the relative permeability of the core using the apparatus a manometer for measuring the difference in pressure of the fluids between the front end and the rear end of the core...
5 columnExtRadiusexternal radius of each conductor in meters. 6 columnCondResistresistivity of the conductor in ohms-meter. 7 columnCondPermrelative permeability of the conductor in pu. 8 columnInsulRadiusexternal radius of insulation in meters. Set tonanif bare conductor. ...
Rock typing plays a crucial role in the prediction of reservoir parameters, particularly permeability in uncored intervals8. The process of coring from multiple wells is frequently necessary and crucial in acquiring fundamental data about the area. Nevertheless, the process of extracting core samples ...
G. Central noradrenergic regulation of cerebral blood flow and vascular permeability. Proc. Natl Acad. Sci. USA 72, 3726–3730 (1975). Article CAS PubMed PubMed Central Google Scholar Tan, C. O. Anticipatory changes in regional cerebral hemodynamics: a new role for dopamine? J. Neurophysiol...
Capillary pressure(h),saturation(S) and relative permeability(k)are three important parameters in study on multiphase flow in porous media,which are main measurement parameters in laboratory experiments,and determination of c. 本文从室内试验和模型关系两个方面综述了土壤中NAPL s、水和气所组成的多相流...
density of electric charge C× m-3 electric current density j A× m-2 electrical conductivity S× m-1 molar conductivity S× m2 × mol-1 dielectric constant e F× m-1 magnetic permeability µ H× m-1 (intensity) of the electric field F, E V× m-1 (intensity) of the magnetic fi...