共查询到19条相似文献，搜索用时 296 毫秒
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核电厂具有高温高压、强放射性等特点,给学生的实体实验学习带来巨大的挑战,必须采用虚实结合的方式进行实验教学。以西安交通大学核电厂与火电厂系统虚拟仿真国家级教学实验中心的3个平台为例,根据实验项目的特点及实验目的,将虚拟仿真实验教学项目分为基础理论学习、专业技能训练和前沿技术研究3个层次,内容由浅入深、由点及面,从而满足学生在不同培养阶段的需要。 相似文献
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邢进华 《常熟理工学院学报》2000,14(2):42-45
本文针对热学参数热扩散与热导率容易引起混淆,从理论和实验两方面阐明热扩散率的物理意义,从而正确区分热扩散率与热导率．并给出了利用光热效应测量热扩散率的方案． 相似文献
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基于Gleeble-3500热模拟试验机平台,对6061铝合金进行等温热压缩实验,研究了该合金在变形温度为350~500℃和应变速率为0.01~10s-1条件下的高温流变行为并建立了6061铝合金的Arrhenius本构方程,应用于Deform软件进行热压缩实验模拟基于动态材料模型和Murty准则,建立了6061铝合金在不同应变下的加工图,结合显微组织进行验证。结果表明,该合金材料的流变应力随应变速率增加而增大,随变形温度降低而增大建立的本构方程能较好描述该合金的高温流变行为变形温度为460~500℃,应变速率为0.1~0.5s-1的区域是该合金最佳工艺参数范围。 相似文献
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价格低廉、防火和保温性能优异的保温材料在建筑节能减排领域中具有非常重要的应用价值.该文制备了以偏高岭土为基料的地聚合物EPS保温材料,为了研究其热物理性能和对房间的保温性能,实验测试了地聚合物EPS保温材料和普通的EPS保温材料的热物性参数,并对外敷两种保温材料外墙房间的传热过程进行数值模拟,研究其保温效果.实验测试结... 相似文献
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LIU Jie CHEN Wen-lu LI Yu-quan 《浙江大学学报(A卷英文版)》2006,7(12):1968-1972
INTRODUCTION Vertical-Cavity Surface-Emitting Lasers (VCSELs) are a new generation of semiconductor lasers that differ considerably from the conventional edge-emitting lasers. In recent years, the characteris- tics of VCSELs have improved enormously (Badilita et al., 2004). Today’s VCSELs have low-threshold current densities and high output power. Moreover, their circular output beam profiles and the suitability to be integrated into 2D arrays make them most promising candidates … 相似文献
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Anders Eriksen D. Osinski D. R. Hjelme 《上海大学学报(英文版)》2014,(1):88-94
We have carried out at laboratory test to study the feasibility of using thermal radiation detectors for online thermal monitoring of electrical systems in wind turbines. A 25 kW frequency converter is instrumented with a thermal camera, operating in the 8-14 μm wave- length range, and a single-pixel thermopile sensor, operating in the 4-8 μm wavelength range, to monitor the temperature development of the power electronics under various load sequences. Both systems performed satisfactorily with insignificant temperature deviations when compared to data from calibrated point contact sensor. With spatial averaging over a 7 mm × 7 mm for the camera and temporal averaging over 60 s for the thermo- pile sensor, we reduce the root mean square noise to 45 mK and 68 mK respectively. The low cost and simple operation of the thermopile sensor make it very attractive for condition monitoring applications, whereas the attractive feature of the camera is the possibility of multi-point or distributed temperature measurements. 相似文献