Shock and Vibration / 2015 / Article / Fig 2

Research Article

Vibration Sensor Approaches for the Monitoring of Sand Production in Bohai Bay

Figure 2

STFT analysis of sand production vibration signals: (a) number A15 well; (b) number A25 well; (c) number A45 well; (d) number A5 well.
(a)
(b)
(c)
(d)

We are committed to sharing findings related to COVID-19 as quickly and safely as possible. Any author submitting a COVID-19 paper should notify us at help@hindawi.com to ensure their research is fast-tracked and made available on a preprint server as soon as possible. We will be providing unlimited waivers of publication charges for accepted articles related to COVID-19.