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本文以“A型超声原理及应用实验”为例介绍医学物理实验教学内容设计。实验内容设计分为三个层次,以突显典型的学科交叉实验的特点。这三个层次分别是:物理原理与实验设计、物理与医学相结合的探究、具体医学应用的实践。教学内容围绕这三个层次展开,希望能在医学类专业学生物理实验学时减少的背景下,力求做到更高效的实验教学。 相似文献
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Compositional and structural evolution of the titanium dioxide formation by thermal oxidation
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Titanium oxide films were prepared by annealing DC magnetron sputtered titanium films in an oxygen ambient. X-ray diffraction (XRD), Auger electron spectroscopy (AES) sputter profiling, MCs^+-mode secondary ion mass spectrometry (MCs^+-SIMS) and atomic force microscopy (AFM) were employed, respectively, for the structural, com- positional and morphological characterization of the obtained films. For temperatures below 875 K, titanium films could not be fully oxidized within one hour. Above that temperature, the completely oxidized films were found to be rutile in structure. Detailed studies on the oxidation process at 925K were carried out for the understanding of the underlying mechanism of titanium dioxide (TiO2) formation by thermal oxidation. It was demonstrated that the formation of crystalline TiO2 could be divided into a short oxidation stage, followed by crystal forming stage. Relevance of this recognition was further discussed. 相似文献
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用光栅光谱仪测量了夫兰克-赫兹实验中Ne原子的发射光谱.光谱分析表明,橙黄色的发射光包含多条谱线,已标定的谱线都是Ne原子从第二激发态的各个子能级跃迁到第一激发态的对应能级所产生的. 相似文献
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