1. Experimental results show that JPEG method is an effective method for digital compression and coding of ultrasonic televiewer images.
实验结果表明，JPEG方法是一种有效的超声电视图象压缩方法。
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2. On borehole televiewer logs. An unusual effect produced on the cathode-ray tube display by erratic movement of the tool as it drags along the borehole.
3. With a model for the ultrasonic signal, the requirement on receiver and transmitter performance and the detection accuracy of the bearings of an ultrasonic borehole televiewer are discussed.
4. With a model for the ultrasonic signal, the requirement on receiver and transmitter performance and the detection accuracy of the bearings of an ultrasonic borehole televiewer are discussed.
