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基于学习质量评价的初中物理单元复习课例初探
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作者 黄柳冰 《科学咨询》 2022年第13期41-43,共3页
我区自2020年9月以来提出,从课堂观察视角,在探索不同课型的初中物理教学课例中如何评价学生的学习质量这一设想,本文以粤教沪科版教材第二章《声音与环境》单元复习课为例,谈一谈我们初探的收获。
关键词 学习质量评价 初中物理 单元复习课例
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Electrical Characteristics of InGaN/AlGaN and InGaN/GaN MQW Near UV-LEDs
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作者 穆森 于彤军 +6 位作者 黄柳冰 贾传宇 潘尧波 杨志坚 陈志忠 秦志新 张国义 《Chinese Physics Letters》 SCIE CAS CSCD 2007年第11期3245-3248,共4页
Electrical characteristics of In0.05 Ga0.95N/Al0.07Ga0.9aN and In0.05 Ga0.95N/GaN multiple quantum well (MQW) ultraviolet light-emltting diodes (UV-LEDs) at 400hm wavelength are measured. It is found that for InGa... Electrical characteristics of In0.05 Ga0.95N/Al0.07Ga0.9aN and In0.05 Ga0.95N/GaN multiple quantum well (MQW) ultraviolet light-emltting diodes (UV-LEDs) at 400hm wavelength are measured. It is found that for InGaN/AlGaN MQW LEDs, both ideality factor and parallel resistance are similar to those of InGaN/GaN MQW LEDs, while series resistance is two times larger. It is suggested that the Al0.07Ga0.93N barrier layer did not change crystal quality and electrical characteristic of p-n junction either, but brought larger series resistance. As a result, InGaN/AlGaN MQW LEDs suffer more serious thermal dissipation problem although they show higher light output efficiency. 展开更多
关键词 coated conductor buffer layer self-epitaxy CEO2
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