By tracking this ratio over time, he can determine how long gas has taken to reach the surface and gain clues to the chemical, thermal, and mechanical state of the rocks the gas is passing through.

通过追踪该比率随时间的变化，他可以确定氡气到达地表需要花费多长时间，同时获得气体所通过的岩石的化学、热力学和机械状态。

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The effect of thermal noise and vehicle dynamics on carrier tracking loop are also analyzed, and the optimal bandwidth of carrier tracking loop is obtained.

并以相位跟踪环路为例分析了热噪声及载体动态性对环路的影响，得出了环路设计的最佳带宽。

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Thermal noise and wind gust are the most significant random disturbances to radar Angle tracking.

热噪声和阵风是雷达角跟踪系统中的两个主要随机干扰源。

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His family's Pittie Enterprises group has tied up with two U.S. firms, SunPower Corp. to make and market cells, and American Sunco to develop tracking systems which ensure maximum sunlight for the U.S. partner's solar thermal and photovoltaic modules.

CNN: Recasting the Mind