珊瑚 发表于 2025-3-25 05:01:31
Roy W. Martin,G. Gilbert Johnstonl as electromagnetic energy and the energy of sound (which is a form of mechanical energy). All electronic systems in order to work must have a source of energy, in particular, electrical energy. Isaac Newton, the seventeenth-century English physicist, suggested that there is a fixed amount of energ休息 发表于 2025-3-25 07:48:34
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onizing radiation . Since the discovery of SEUs at aircraft altitudes, researchers have made significant efforts to monitor the environment. The space and the earth environment contain various ionizing radiations, generated by natural phenomena such as sun activity and manmade radiation that intecontrast-medium 发表于 2025-3-25 16:21:08
Ultrasonic Scattering Properties of Blood,first biological tissue on which ultrasonic scattering measurements were made . These efforts raised more questions than answered. Since then, a large body of data to better understand ultrasonic scattering phenomenon in blood has been acquired and will be reviewed in this chapter.conifer 发表于 2025-3-25 22:57:49
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Differentiation of Coronary Syndromes with Intracoronary Ultrasound,, which can be used for analysis of coronary morphology and function as well as coronary flow, are intravascular ultrasound and Doppler . Based on these techniques, new information on coronary syndromes was obtained.