Hemiplegia
发表于 2025-3-26 22:33:24
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adumbrate
发表于 2025-3-27 03:06:31
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modest
发表于 2025-3-27 08:05:37
,Generation of Ultrasound—Part II,at particularly low or very high frequencies. Furthermore, certain transducer types and supplementary techniques will be described as they are employed to attain high intensities or high motional amplitudes as well as to produce other than longitudinal waves.
才能
发表于 2025-3-27 11:30:29
Applications of High Intensity Ultrasound, kind in materials and objects by the action of ultrasound. This can be understood as material processing in the widest sense of the meaning. Although in this instance effects other than those of sheer energy transported by the sound waves are frequently employed, it is evident that they must have a certain minimum energy to produce such changes.
温和女人
发表于 2025-3-27 13:42:22
German edition, it is based on lectures on ultrasound which the author has given over the past fifteen years to students of electrical engineer ing and physics at the Rheinisch-Westfiilische Technische Hochschule Aachen, Germany. Its purpose is to explain and describe the peculiarities of high freq
Firefly
发表于 2025-3-27 21:28:31
Basic Concepts of Acoustics,asonics are broadly the same as in general acoustics. Therefore it may be useful to present a short summary of fundamental acoustical ideas and facts in this chapter as far as they are of importance for ultrasonics. With a few exceptions, detailed derivations and proofs are omitted; they can be discovered in any good textbook on acoustics.
衣服
发表于 2025-3-28 01:37:24
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Watemelon
发表于 2025-3-28 05:18:08
Special Methods of Ultrasonic Imaging,cts. Although under favourable conditions the contours of an object can be recognized from these secondary sound fields, this kind of representation is inferior to that achieved by imaging in the optical sense.
排斥
发表于 2025-3-28 08:53:00
Cavitation,. Cavitation is also one possible mechanism for the damage of body tissues caused by intense ultrasound. But apart from these and similar effects it is of interest in its own right from a physical point of view. For these reasons, a separate chapter in this book is devoted to cavitation.
调情
发表于 2025-3-28 13:50:47
Applications in Signal Processing and Measuring Techniques,cal development of the glass fibre has opened up the possibility of transmitting signals in optical form over large distances. For this reason, optical methods of signal processing have also found a new . and are gaining in importance.