对比密度(reduced density),指任意状态下物质密度与 临界状态下该物质密度之比。X线影像形成的基本原理是由于X线的特性和人体组织器官密度与厚度之差异所致...
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reduced-density effect 约化密度效应
second order reduced density matrix 二阶约化密度矩阵
first order reduced density matrix [物化] 一阶约化密度矩阵
reduced density of states 约化态密度
reduced density matrices 约化密度矩阵
effect reduced-density 密度减低效应
The reduced density of the bird skeleton provided a light but strong frame.
减轻了的骨架密度则提供了轻巧而坚固的身体框架。
The key to this is the reduced density of the atmosphere, which affects how fast the ball moves through the air and also the bend of a spinning ball.
此处的关键在于大气的折合密度,它会影响球在空中穿越的速度以及旋转球的弯曲度。
Using it we can conveniently and simply convert a ME into its corresponding differential equation and from solution of which we can extract the reduced density operator.
该方法能方便、简洁地将密度主方程转化为对应的普通微分方程,并能从微分方程的解中提取出约化密度算符。
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