僵硬
发表于 2025-3-23 13:23:06
e Entwicklung der Herzchirurgie in den letzten 60 Jahren genommen. Seit der Entwicklung des kardiopulmonalen Bypasses ist der therapeutische Einsatz von Hypothermie eng mit der Herzchirurgie verbunden. Man unterscheidet zwischen milder (32–35°C), moderater (26–31°C), tiefer (20–25°C) und profounder
戏服
发表于 2025-3-23 16:41:00
,The Laser — An Unprecedented Light Source,R (Microwave Amplification by Stimulated Emission of Radiation) which was invented in 1954. Around the time when the laser was invented in 1960, it was called an optical maser or an infrared maser. The word laser has been generally accepted since about 1965.
有害处
发表于 2025-3-23 20:19:57
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Aids209
发表于 2025-3-24 00:46:27
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保存
发表于 2025-3-24 05:36:54
Emission and Absorption of Light,w and led further to the inventions of the maser and the laser. It was eventually found that the emission and absorption of light by matter took place discretely with an energy quantum or a photon as a unit, and it was this fact which became the foundation of the development of quantum physics durin
推测
发表于 2025-3-24 09:13:30
Principle of the Laser,apter an elementary theory of laser action is presented with the help of circuit theory and rate equations. The semiclassical theory and the quantum-mechanical theory of the laser are deferred to Chap. 9.
radiograph
发表于 2025-3-24 12:08:07
Output Characteristics of the Laser, relaxation. There are different theories of the laser in treating these factors. They are classified into the rate-equation theory, the semiclassical theory, and the quantum-mechanical theory. In the quantum-mechanical theory, both light and atoms are treated quantum-mechanically, while in the semi
SLUMP
发表于 2025-3-24 14:55:01
Coherent Interaction,t consider the coherent interaction between light and atoms in order to attain a basic understanding of the most important characteristic of the laser, namely, coherence. Then we discuss how the interaction of atoms with coherent light is different from an interaction with incoherent light.
ARIA
发表于 2025-3-24 21:45:35
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capillaries
发表于 2025-3-25 01:50:08
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