The effect of hole diameter change on sound logging data should not be neglected in sound logging.

在声波测井中，井径的变化对声波测井数据的影响是不能忽略的。

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For the geological property of Xihu Trough Area in the East China Sea, density and sound wave in the logging data is used to set up the wave impedance curve.

根据东海西湖凹陷地质特点，利用测井信息中的密度和声波建立波阻抗曲线。

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Researches on the effect of vertical logging speed on NMR logging responses can provide a sound basis for tool design and data interpretation.

研究垂直方向的速度对NMR测井响应特征的影响，能够为仪器设计和资料解释应用提供重要依据。

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Second, environmentalists have been effective at stopping timber sales because courts and agency officers have recognised consistently that the Forest Service, in catering mainly to logging over the decades, has failed to comply with scientifically sound resource-protection laws that govern forest management.

ECONOMIST: Letters