This number was chosen when the SI second was redefined for the last time in 1967 to match with the previous definition. If we look at the history of timekeeping and compare clocks as different as sun dials, pendulum clocks, and quartz clocks, it is obvious that they get more accurate as...
I Twentieth-Century History The foundations of both modern nuclear physics and modern atomic physics were established by Ernest (Lord) Rutherford through a series of celebrated experiments first published in 1911. He used alpha particles from naturally radioactive emitters as projectiles to bombard a ...
Based on the history of manufacturing development, Fang formally proposed three phases of manufacturing advances [6, 7]:Manufacturing I: Craft-based manufacturing by hand, as in the Stone, Bronze, and Iron Ages, in which manufacturing precision is at the millimeter scale.Manufacturing II: ...
Here we review briefly the history of atomic simulations in catalysis and then focus on the recent trend shifting toward ML potential calculations. The advanced methods developed by our group are outlined to illustrate how complex structures and reaction networks can be resolved using the ML ...
The International Committee on Atomic Weights (ICAW) has a long and colorful history dating back for over a century. Initially, the task was to provide the... NE Holden - 《Chemistry International》 被引量: 11发表: 2004年 Atomic Weights of the Elements 1977 Accurate determinations of the a...
Through numerical simulations using the non-polynomial Schödinger equation—an effective one-dimensional Gross–Pitaevskii equation—we investigate the effect of atom number, scattering length, and BEC momentum width on the resonant transmission peaks. For [Math Processing Error]85Rb atomic sources ...
解锁新技能，起码要以年为单位。在解释养成好习惯的步骤时，本书还提到了自控力是个伪命题，人不可能...
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In a long history, gas-phase synthesis and size-selected strategy was the only method to prepare supported metal clusters with precise numbers of atoms20,21,22,23,24,25. However, the throughput of this method is only enough for analytical-scale study and far from the requirement of the ...
Scientific Reports volume 6, Article number: 20288 (2016) Cite this article 5410 Accesses 62 Citations Metrics details Abstract Material performance is significantly governed by grain boundaries (GBs), a typical crystal defects inside, which often exhibit unique properties due to the structural and ...