山顶可休息
发表于 2025-3-23 11:34:35
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允许
发表于 2025-3-23 14:23:15
New Standards of Mass,ram is likely to be redefined in relation to Planck’s constant. The work in progress discussed in this chapter aims to determine Planck’s constant by means of a watt balance and the Avogadro constant by counting the number of atoms in a mass standard of monocrystalline silicon .Si (XRCD method). For
精致
发表于 2025-3-23 20:14:05
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GRAVE
发表于 2025-3-24 00:25:07
Single Electron Tunneling,. We discuss the attempts to construct a direct-current standard with SET junctions and explain why the results are unsatisfactory. We also describe two SET systems of more practical importance: the electron-counting capacitance standard (ECCS) and the Coulomb blockade thermometer (CBT).
MOTTO
发表于 2025-3-24 04:34:44
New Standards of Mass,the results obtained by different methods should agree. Apart from the two methods mentioned above, we discuss the development of a mass standard based on the accumulation of heavy metal ions of gold (.Au) and bismuth (.Bi).
Malcontent
发表于 2025-3-24 09:03:21
ications and exercises for electrical quantities, mass, leng.This book presents the theory of quantum effects used in metrology and results of the author’s own research in the field of quantum electronics. The book provides also quantum measurement standards used in many branches of metrology for el
完整
发表于 2025-3-24 13:38:15
,The New SI System of Units—The Quantum SI,ars, since the first proposals by K. Gauss and J. Clerk Maxwell. We discuss the proposed redefinition of four SI units: kilogram, ampere, kelvin and mole. We present the particular importance of the new definition of the kilogram and the difficulties encountered in the development of a quantum standard of the unit of mass.
和平主义者
发表于 2025-3-24 15:40:08
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故意钓到白杨
发表于 2025-3-24 20:14:07
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冷淡一切
发表于 2025-3-25 01:55:28
Quantum Hall Effect and the Resistance Standard,fied experimentally. Conductance quantization in nanostructures is used in the analysis of large-scale integration circuits, as required by the currently used 14 nm technology and future technologies.