替代法和中值法测量电流计表头内阻的实验教学

替代法和中值法测量电流计表头内阻是普通物理实验中的一个基本实验．目的是了解电流计内阻在实验中所起的作用，掌握它的测量方法，了解电流计内阻对测量的影响，训练按回路接线及电学实验的操作．实验过程中，经常会出现同一共性问题．本文从理论上分析产生这一问题的原因，并阐述解决方法．     

信息技术在体校物理教学中应用的探索

研究信息技术在体育运动学校物理教学中的一些应用方法和途径.     

高等学校化学学报第31卷(1～12期)学科分类目次

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Tracking problem under a time-varying topology

This paper studies the multi-agent tracking problem of a third-order maneuvering target under uncertain communication environments. Each tracking agent is assumed to be a third-order system and can only use its own and neighbors＇ position, velocity, and acceleration information to design its control input. In this work, the uncertain communication environments are modelled by a finite number of constant Laplacian matrices together with their corresponding scheduling functions. Sufficient conditions for the existence of a tracking strategy have been expressed in terms of the solvability of linear matrix inequalities. Finally, a numerical example is employed to demonstrate the effectiveness of the proposed tracking strategy.     

定性分析法在含有数值判断题分析中的作用

对含数值的判断题,先根据物理规律列出方程,然后把具体数值代入方程,用计算的结果可以做出精确的判断.一般情况下,对于含数值的判断题用计算的方法是行之有效的.但在有的情况下,所给的数值之间具有倍数关系,是巧合,还是隐藏"天机"?笔者发现,若能根据数值之间的倍数关系,采用定性     

Bovine Serum Albumin Loaded Solid Lipid Nanoparticles Prepared by Double Emulsion Method

Solid lipid nanoparticles loaded with bovine serum albumin(BSA) were prepared by a double emulsion method. As the mass fraction of the model drug BSA increased from 0 to 15%, the particle size gradually increased. The physical stability of the nanoparticles was investigated by zeta potential measurement and they were shown to be quite stable. Fluorescence spectroscopy confirmed that the loaded position of BSA was on the interface between the inner aqueous phase and the solid lipid phase. Both Fourier-transf...     

论物理教学中强化环境保护意识教育

对物理教学中进行环境保护意识教育的可行性和策略进行了研究分析,认为物理教学中进一步强化环境保护意识有助于学生自觉运用科学、数学及技术的思维习惯和知识,处理、思考日常生活中的观念、主张和事件,增强学生的社会责任感,有利于人类改善生存环境愿望和目标的早日实现.     

企业何以愁“媒”苦脸

所谓媒体，通俗的说就是信息传递的载休或平台，而对于企业，媒体是企业与消费并沟通的桥梁。但这个桥梁却具有两面性，有句老话来形容媒体再贴切不过——“成也箫何败也萧何”。