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下面是一个使用库的简单示例，演示了如何在多线程环境中安全地更新一个共享计数器。
At mid-century the kinetic principle of gases correctly attributed these kinds of phenomena as being the pressure and viscosity of the gas to the motions of atomic and molecular particles. By 1895 the rising weight of chemical evidence as well as the results in the kinetic idea left tiny question that atoms and molecules were authentic.
Avogadro referred to as these types of conglomerations molecules, and, on The idea of experimental do the job, he conjectured that the molecules in the fuel of hydrogen or oxygen are formed from pairs of atoms.
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But from what I might make of it thus far, it appears to be the last word paradox: the earth at the same time contracted to its most personal, atomic sort, as well as explosion of a wholly new universe.
Periodic table exhibiting the origin of each and every component. Features from carbon around sulfur may very well be produced in smaller stars from the alpha course of action. Components over and above iron are created in significant stars with slow neutron capture (s-approach). Things heavier than iron might be manufactured in neutron star mergers or supernovae once the r-course of action.
Atomic physics usually refers back to the examine of atomic structure as well as conversation in between atoms.[one] It really is mainly worried about the best way by which electrons are organized across the nucleus and
Atomic physics has proved to get a spectacularly productive software of quantum mechanics, which has become the cornerstones of modern physics.
Because of this, atoms with matching figures of protons and neutrons are more stable against decay, but with growing atomic amount, the mutual repulsion in the protons calls for a growing proportion of neutrons to keep up the stability from the nucleus.[45]
Back in 1815, William Prout noticed the atomic weights of many components were multiples of hydrogen's atomic weight, which happens to be in actual fact genuine for all of them if a single requires isotopes under consideration. In 1898, J. J. Thomson observed the good demand of a hydrogen ion is equivalent for the unfavorable demand of an electron, and these were then the smallest regarded charged particles.[22] Thomson afterwards identified which the constructive charge in an atom is a constructive numerous of the electron's unfavorable demand.
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The correct beginning of atomic physics is marked by the invention of spectral strains and makes an attempt to describe the phenomenon, most notably by Joseph von Fraunhofer. The study of such Atomic Wallet traces led on the Bohr atom model and to the delivery of quantum mechanics.