对比式离心现象实验装置

为了弥补现行教科书中,离心运动的演示实验装置及离心现象产生实质的知识呈现不足,设计了符合学生认知规律的离心实验装置.该装置通过对比2个物体在相同的角速度下产生相反的运动状态,说明物体做离心运动,不是由角速度产生,而是只有合外为突然消失或是合外力不足以提供向心力时,才能产生离心运动.     

综合性设计性实验的教学思路探讨

介绍了北京科技大学近年来面向低年级本科生开设综合性设计性实验的教学思路.在实验项目的设置上,根据实验室条件重点考虑可操作性;在实验内容方面重点考虑渐进性,让学生力所能及;在教学方式上强调引导,激发学生的研究兴趣.     

大学物理实验开放式学习系统开发——基于EXCEL的实现

针对大学基础物理实验中存在的问题,借用EXcel电子表格优越的数据处理功能和友好的界面制作出实用的实验自学系统,帮助学生提高对基础物理实验的自学能力、实际操作能力和数据处理能力,为后续开设的实验课程打下良好的基础!     

设计性研究性实验题目设置和教学方法初探

本文站在提高学生科学素养、培养创新型人才和增强国家科技竞争力的高度,针对大学物理实验教学中普遍存在的设计性、研究性实验题目设置"难",以及由此带来的教学"难"问题,提出了明确的思路和较实用的解决方案,对于全面贯彻教学基本要求,提高实验教学层次和质量具有重要的现实指导意义。     

Extreme beam attenuation in double-slit experiments: Quantum and subquantum scenarios

Combining high and low probability densities in intensity hybrids  , we study some of their properties in double-slit setups. In particular, we connect to earlier results on beam attenuation techniques in neutron interferometry and study the effects of very small transmission factors, or very low counting rates, respectively, at one of the two slits. We use a “superclassical” modeling procedure which we have previously shown to produce predictions identical with those of standard quantum theory. Although in accordance with the latter, we show that there are previously unexpected new effects in intensity hybrids for transmission factors below a?10⁻⁴$a?10^{-4}$, which can eventually be observed with the aid of weak measurement techniques. We denote these as quantum sweeper effects, which are characterized by the bunching together of low counting rate particles within very narrow spatial domains. We give an explanation of this phenomenology by the circumstance that in reaching down to ever weaker channel intensities, the nonlinear nature of the probability density currents becomes ever more important, a fact which is generally not considered–although implicitly present–in standard quantum mechanics.     

“示波器使用”教改初探

本从实际应用出发,以提高学生综合能力为目标,对传统的。示波器使用”的教学模式进行了改革,提出新的方法和手段。     

大学物理实验网络教学平台的建构与应用

利用多媒体开发软件及网页制作工具,建构了一个大学物理实验网络教学平台。介绍了此平台的详细设计方案,以及它所具有的功能和特点,探索大学物理实验多媒体网络辅助教学的新应用。     

Design and application of phase photon sieve

The imaging principle of Fresnel zone plate and photon sieve were analyzed in this paper. The design and fabrication of phase photon sieve were discussed. The feasibility of using phase photon sieve to realize nano-lithography was analyzed, a novel lithography experiment system based on phase photon sieve was presented, which not only has higher resolution and image contrast than the Fresnel zone plate lithography but also have higher diffractive efficiency than the amplitude photon sieve lithography.     

基于Matlab Simulink的物理实验——简谐振动仿真研究

以简谐振动和阻尼振动仿真为例介绍了用Simulink对物理实验进行仿真建模的方法。给出了位移、速度等振动曲线;可对振动过程中的动能、势能以及机械能进行监测。体现出Simulink仿真物理实验的优越性。     

一种新型近共沸混合工质的循环性能实验研究

文中开展了对一种新型近共沸混合物的整机性能实验研究,该混合物具有零ODP值和低GWP值,可作为传统工质R502甚至是R404A的长期替代物。根据国标GB/T 5773-2004搭建了第二制冷剂量热器的整机性能测试实验台。试验在蒸发温度为-40℃的商用制冷温区进行,系统研究了在不同蒸发温度、冷凝温度、过冷度、过热度等工况下的性能。实验结果与R404A进行了比较,包括压比、压缩机功耗、制冷量、COP、吸气温度。实验结果表明,该新工质COP比R404A高9.2%至14.2%。