Characterization of DC magnetron sputtering deposited thin films of TiN for SBN/MgO/TiN/Si structural waveguide     

徐玄前  叶辉  邹桐 《浙江大学学报(A卷英文版)》2006,7(3):472-476

INTRODUCTION Monocrystalline SBN (Strontium barium nio-bium, SrxBa1?xNb2O6, denoted SBNx?100, where 0.25≤x≤0.75) solid solution, is currently being inves-tigated as potential material for many micro-device applications, such as piezoelectric infrared detectors, piezoelectric, electro-optic modulators, and holo-graphic storage (Koch et al., 1998), because SBN has one of the largest known linear electro-optic coeffi-cients (r33=1300 pm/V for SBN75), two orders of magnitude larger th…  相似文献   

大学生英语口语学习调查与分析     

张佩  邹桐 《考试周刊》2013,(80):90-90

本文旨在通过对大学生英语口语学习现状的调查．分析验证英语口语学习一对一平台的可行性和盈利性。调查首先对当代大学生英语口语的学习现状进行了分析。指出了英语口语学习中存在的问题：接着对当前大学生对英语口语交流的需求程度及市场前景进行了分析．指出英语口语交流具有广泛的市场需求;最后对英语口语一对一学习交流的平台的可行性及盈利性进行了深入分析。  相似文献