两边在扩散
发表于 2025-3-21 17:24:16
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松果
发表于 2025-3-21 20:38:58
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Orchiectomy
发表于 2025-3-22 01:45:40
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障碍
发表于 2025-3-22 07:27:19
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AMOR
发表于 2025-3-22 12:25:31
Modern Approaches in Geophysicshttp://image.papertrans.cn/i/image/468131.jpg
碳水化合物
发表于 2025-3-22 12:58:35
Introduction,ainly due to advancement in making more sensitive seismographs and devising timing systems, so that earthquakes could be located. Later, the importance of accurate measurement of the true ground motion became evident for studying seismic wave attenuation, and the Richter magnitude scale depends on b
PAN
发表于 2025-3-22 20:49:51
Seismic sensors,eismometer also has to give a dynamic physical variable related to this motion. In the earlier seismometers, this variable was the displacement of a stylus representing the amplified ground motion. In present day instruments, the physical output that a seismometer yields is always a voltage..Ideally
remission
发表于 2025-3-22 23:58:14
Seismic noise,o origins: Noise generated in the instrumentation and ‘real’ seismic noise from earth vibrations. Normally, the instrument noise is well below the seismic noise although most sensors will have some frequency band where the instrumental noise is dominating (e.g. an accelerometer at low frequencies).
山间窄路
发表于 2025-3-23 04:34:16
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Congruous
发表于 2025-3-23 08:38:57
Seismic Recorders,ntly recording them. Since the seismometer output signals generally are small, and maybe noisy, they have to be amplified and filtered before recording. This is the analog signal preparation. In its simplest way, a recorder is any device plotting the signal in a permanent way, like a chart or drum r