He found that the length of time it takes a sound's echo to decay is determined by the absorption of the sound's original energy by surrounding material.
他发现，声音回声衰减的时间长短取决于周围物质对声音原始能量的吸收。
"These creatures get their energy from sources we never imagined," McKay exclaims. "the South African extremophile bacteria are powered by the radioactive decay of unstable atoms in the rocks."
“这些生物从一个我们从未想到的来源获取能量，”McKay惊叹，“南非的极端微生物细菌吃的是岩石里不稳定原子衰变时的放射能。”
Hawking showed that black holes radiate energy and decay over time (the aforementioned Hawking radiation).
Hawking说明了黑洞向外辐射能量并随着时间衰减(前文提到的Hawking辐射)。
In any case, the council added, buried coffins gradually release energy through decay to feed plants and other organisms.
委员会还认为：“不管怎样，埋在地下的棺材会因腐烂而逐渐释放能量，供给植物和其它生物生长。”
Department of Energy. Specific instruments are designed to detect particular kinds of radiation that get released with each decay.
专门的仪器被设计用来探测特定的每次裂变所释放出的辐射。
This is because radioactive nuclear elements are formed in the giant outbursts of energy, and some of these decay by releasing positrons.
这是因为放射性核素在这巨大的爆炸能量中形成，其中一些放射出正电子而衰变。
It saying there's not enough thermal energy to populate, to knock things into states whose energy is much higher than that. So you have a very precipitous decay.
这就意味着没有足够的热能，使这些能量大于kT的状态被占据，我们有一个非常陡峭的衰减。
The proportion between the thermalization process and diffusion process possess in all the decay process is determined by photon energy of excitation.
载流子的热弛豫过程与扩散过程在整个衰减过程中所占的比例，取决于激发光子的能量。
Whilst the detoxification requires energy, slow decay may still occur.
由于解毒作用需要能量，所以缓慢的腐朽仍然会发生。
The preexisting cracks not only help increase fracture effeciency but also absorb the energy of the stress wave to induce a decay of its propagation.
而介质中原有的裂隙，除能提高破碎效率，还能吸收应力波的能量，使得应力波在传播过程中衰减。
The exponent decay of solution of wave equation with boundary memory is obtained by the energy method.
本文利用能量扰动法得到具边界记忆项波动方程初边值问题解的指数衰减性。
In this paper, we consider the exponential decay of energy of the cantilever Timoshenko beam with local viscoelastic damping on the free end.
本论文研究自由端具有局部粘弹性阻尼的悬臂梁的能量指数衰减问题。
The quantity relationship between the energy decay rate and parameter of system is of great significance in big flexible structure.
系统能量指数衰减率与系统参数之间的定量关系在大型柔性结构控制中有广泛的应用意义。
This logarithmic decay ratio of the shaft set is in direct proportion to the ratio of the energy dissipated per cycle to the peak strain energy.
轴系扭振的模态对数衰减率正比于每个振动周期耗散的能量与峰值应能的比值。
In the case of nonuniform decay in the energy space, we derive explicit polynomial decay estimates valid for regular initial data.
在能量空间中，当梁的能量非一致衰减时，由初始条件得到了梁的能量多项式衰减估计。
Mainly used three methods, including including the F-K domain filter, internal excision and the energy decay method to attenuate multiple and obtained a more ideal result.
主要采用了F - K域滤波法、内切除和近道能量衰减法压制多次波三种技术，取得了较好的效果。
Its working principle is nuclides in the process of decay, the releases of particles or ray energy is different.
其工作原理是不同核素在衰变过程中，释放出的粒子或射线能量是不同的。
The concept of roll energy decay function is put forward, and the nonlinear damping coefficients are solved based on the minor error between actual energy function and evaluated energy function.
提出了能量衰减函数的概念，并由实际能量衰减函数与估算能量衰减函数之间的方差最小来确定非线性阻尼系数。
Energy decreases slows down and extracting three kinds of decay mode: cycle type, arc-shaped, linear type;
整体能量衰减速度减慢，并提出周期型、弧线形、直线型三种能量的衰减模式；
This decay mechanism of the levitation force was attributed to the declined performance parameter of the bulk which was caused by the heat resulting from the energy loss.
其中，运动外磁场下块材悬浮力衰减的作用机理被归结为能量损耗带来的热量导致块材的性能参数下降。
By using the perturbed-energy method, the exponential decay of the solution is obtained for the nonlinear wave equations with time-dependent coefficients and dissipative boundary condition.
利用能量法证明了具耗散边界条件和时间依赖系数的非线性波方程的能量指数衰减性。
In this paper the progress and prospect of utilization of nuclear energy (decay, fission and fusion energy) are reviewed.
本文评述了核能(衰变能、裂变能、聚变能)利用的现状和前景。
Cerium-doped orthoaluminate(YAP:Ce) is a kind of scintillator with high light yield and fast decay time, which makes it a good choice for applications in high-energy physics and medical imaging.
YAP晶体具有优良的闪烁性能，其主要特点是衰减时间短，光产额大，在高能射线探测、核医学等方面有着广阔的应用前景。
The decay radiation then deposits most of its energy in the fuel, and this is what is referred to as decay heat.
衰变辐射也能释放部分热量，这种热量被称为衰变热。
The water temperature originates in geothermy warming rate and the radioactive element decay has the heat energy.
水温来源于地热增温率及放射元素的衰变产生热能。
Researchers have demonstrated a penny-sized "nuclear battery" that produces energy from the decay of radioisotopes.
研究人员展示了一块一便士大小的“核能电池”，该电池可利用放射性同位素的衰变产生电能。
Researchers have demonstrated a penny-sized "nuclear battery" that produces energy from the decay of radioisotopes.
研究人员展示了一块一便士大小的“核能电池”，该电池可利用放射性同位素的衰变产生电能。
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