用电子模拟软件EWB进行电路设计和仿真实验

探讨了用电子模拟仿真软件EWB分析、设计电路的一般方法及一些参数的设置.     

齐思和治史方法简论

齐思和在史学领域做出的突出贡献和他的史学方法密切相关,而《中国史探研》一书则是其史学方法的集中体现。将其史学方法归纳为描述性统计法、比较研究法、本末缕叙法等三种方法,并举实例予以说明。     

差异是数理统计思想方法的重要滋生点

在随机性数学模型的研究中,必须注意观察数据之间的差异.如何从千差万别的数据中提炼我们所需的信息,便产生了重要的数理统计的概念和思想方法.     

自主性学习的特征及其方式

自主性学习是创新学习的方法之一，应充分认识自主性学习的特征，正确地选择适合自己学习个性特点的学习方法，提高学习效率。     

应用羟基磷灰石人工骨填塞拔牙创保持牙槽嵴高度

作者采用羟基磷灰石人工骨填塞于33例拔牙创中,通过不同时期与对照组进行X线检查证实:拔牙创内植人人工骨后,对于牙槽骨起到了支持作用,在一定程度上抑制了牙槽骨的吸收量,保持了牙槽嵴的高度,为义齿修复创造有利条件。     

树立素质教育观念搞好物理教学改革

在大学物理教学中应当加强思维能力训练、提高学生的科学素质,可以从两个方面进行探讨。     

试析董仲舒"天人合一"学说的论证方式

汉儒董仲舒在《春秋繁露》中,主要运用了类比论证的方式将儒家"天人合一"思想系统化、理论化。董仲舒的"天人合一"说及其论证方式折射出中国传统思维方式的整体性特征。这种思维特征对中国人的政治思维方式影响至深。     

稀土电解槽温度场有限元应用模拟研究

运用傅立叶方程建立了氟化体系稀土电解槽的温度场的有限元模型,采用VC6.0编程制作了相应的软件,并对导热系数、密度、比热等相关参数进行了运行计算研究.结果表明,建立的数学模型和编制的软件对稳态温度场的数学模拟计算结果与实际测试的结果基本吻合.可为新一代稀土电解槽体的开发设计提供参考.     

怎样"说"音乐课

从说课的概念、说课的内容、怎样说课、说课中应该注意的问题等几个方面来进行论述,指出说课有助于教师钻研教材、改进教学方法、提高教学质量、推进课程教学改革.     

Understanding storage environmental stability during power outages: A key issue in sub-tropical climates

Efficient air-conditioning systems facilitate climate control in modern museums, libraries, and archives. The climate in Hong Kong is typically hot and humid, so the survival of collections is highly dependent on 24-hour air-conditioning systems to maintain the desired environment in repositories of archives and books, or artefact stores. The continuous operation of such systems in turn relies on a number of factors, such as uninterrupted electricity supply, an active maintenance programme, daily monitoring of their performance and quick response to irregularities as well as backup or alternative systems to support the air-conditioning load in case they are down for servicing. From the risk management point of view, unlike the latter four factors, electricity supply is an external factor that cannot be guaranteed. Fluctuation in the power level that results in stoppage of air-conditioning equipment is not uncommon even in well-developed countries. Long power outages could be catastrophic as they might lead to irreversible damage to collection items as a result of fast, large, changes in temperature and relative humidity (RH) towards the external environment if the air-tightness or hygrothermal stability of the storage are not good enough. Understanding storage environmental stability, especially during electrical power disruptions, is an essential part of the preservation measures and disaster preparedness necessary to protect valuable collections in cultural heritage institutions in the region.