Analysis of the Online and Offline Hybrid Teaching of Traditional Chinese Medicine Classics

Distance education had sufficient technical capabilities before the novel coronavirus outbreak,but its advantages were not reflected in the normalized school running model.In the early stage of the pandemic,many students were affected and could not return to school.Many schools implemented online teaching to avoid delaying classes.After the alleviation of the pandemic,several colleges and universities taught students with a combination of online and offline methods after returning to school.The integration of online and offline teaching is conducive to the overall improvement of teaching quality in colleges and universities.This paper summarizes the shortcomings of the existing online and offline integrated education model in the teaching of traditional Chinese medicine classics in hope to further optimize the modem education system of traditional Chinese medicine courses.

基于参数残差驱动贝叶斯网络的冷水机组故障诊断

应用于冷水机组的故障诊断技术对于降低建筑能耗,提高机组运行效率有着重要作用。为了进一步提高冷水机组故障诊断性能,同时考虑到特征参数残差蕴含更多故障信息,提出一种基于特征参数残差驱动贝叶斯网络(BN)的冷水机组故障诊断方法。首先,构建特征参数基准值模型,获得其基准值;然后使用基准值和其实际运行值之间的参数残差训练BN模型。以此达到充分利用参数残差蕴含故障信息,从而提高故障诊断性能的目的。使用实验数据对构建方法的有效性进行验证,与使用特征参数直接驱动BN的诊断模型相比,对冷水机组常见故障的诊断正确率最高提升了约22.51个百分点。此外,比较分析了三种参数基准值模型构建方法的性能,基于神经网络方法的基准值模型较其他两种基准值模型表现更优。

扭曲椭圆管强化传热研究进展及应用

扭曲椭圆管因结构简单、强化传热及阻垢性能优异,近年来成为被动强化传热领域研究热点之一。虽已有文献对扭曲椭圆管换热器技术进行了综述,但对扭曲椭圆管强化传热特性的归纳和工程应用研究脉络的梳理存在不足,本工作着眼于扭曲椭圆管内外传热及流阻性能研究、扭曲椭圆管换热器研发和工程应用两方面内容,概括了扭曲椭圆管(束)结构、工质、流动状态对传热性能及流阻特性的影响规律;回顾了扭曲椭圆管换热器工程应用案例,总结了有关扭曲椭圆管研究尚待完善之处,并对扭曲椭圆管强化传热研究的发展趋势进行展望,为深化扭曲椭圆管理论研究和工程实践提供指导和参考。要点:(1)概述了扭曲椭圆管内外传热、流阻及阻垢特性研究进展。(2)回顾了扭曲椭圆管换热器工程应用案例。(3)指出了扭曲椭圆管强化传热研究中存在的问题,并对其未来研究方向进行展望。