电、磁、超声复合场在景观水处理方面的应用研究

阐述了景观水污染特点及危害,介绍电、磁、超声复合场在景观水处理方面的实验研究,研究结果表明其能有效地杀菌灭藻,是一种新型的景观水处理方法.     

Historical Experiments in Students’ Hands: Unfragmenting Science through Action and History

Two students, meeting together with a teacher, redid historical experiments. Unlike conventional instruction where science topics and practices often fragment, they experienced interrelatedness among phenomena, participants’ actions, and history. This study narrates actions that fostered an interrelated view. One action involved opening up historical telephones to examine interior circuitry. Another made sound visible in a transparent air column filled with Styrofoam bits and through Lissajous figures produced by reflecting light off orthogonal nineteenth century tuning forks crafted by Koenig and Kohl. Another involved orienting magnetic compasses to reveal the magnetism of conducting wires, historically investigated by Oersted and Schweigger. Replicating Homberg’s triboluminescent compound elicited students’ reflective awareness of history. These actions bore pedagogical value in recovering some of the interrelatedness inherent in the history and reintroducing the wonder of science phenomena to students today.     

统计软件的可靠性论证

在统计软件测试或软件维护过程中，利用抽样调查方法，通过数学模型，对软件可靠性的重要指标残留错误总数进行测定，从而认为软件质量是可以定量计算的，这有助于软件人员进行改进软件质量的工作。     

稀土永磁同步电动机调速的研究

本讨论稀土永磁同步电动机空载反电动势R的取值是电磁设计的关键所在．它关系列永磁同步电动机运行性能的效率和功率因数的大小，采用变压变频(VVVF)交流调遣系统，可以保持电源的频率f与电源的电压U以及与空载反电动势E0的对应关系，结合稀土永磁同步电动机的设计值和试验实测值。阐明变压变频(VVVF)交流调速系统是稀土永磁同步电动机的最佳调速方法。     

基于LPC2103的同步发电机端电压稳定控制系统

提出基于LPC2103的同步发电机励磁控制系统设计。介绍了系统的硬件设计方案;软件设计,包括系统的的主程序流程图、频率测量、模糊PID控制以及其实现的基本方法。测试结果表明,利用ARM微控制器可使编程操作简单,调节速度快,主要性能指标符合要求。     

The p-orbital magnetic topological states on a square lattice

Honeycomb or triangular lattices were extensively studied and thought to be proper platforms for realizing the quantum anomalous Hall effect (QAHE), where magnetism is usually caused by d orbitals of transition metals. Here we propose that a square lattice can host three magnetic topological states, including the fully spin-polarized nodal loop semimetal, QAHE and the topologically trivial ferromagnetic semiconductor, in terms of the symmetry and k · p model analyses that are material independent. A phase diagram is presented. We further show that the above three magnetic topological states can indeed be implemented in the two-dimensional (2D) materials ScLiCl₅, LiScZ₅ (Z=Cl, Br) and ScLiBr₅, respectively. The ferromagnetism in these 2D materials is microscopically revealed from p electrons of halogen atoms. This present study opens a door to explore the exotic topological states as well as quantum magnetism from p-orbital electrons by means of the material-independent approach.     

第Ⅱ类超导体孤立磁通线的能量计算

应用Ｍａｘｗｅｌ方程,分析了超导体的电磁特性,并计算Ⅱ类超导体孤立磁通线的能量。     

轻量级赛艇运动员使用磁疗床前后血色素和血尿素水平的研究

以某省赛艇队轻量级运动员为研究对象,通过问卷调查了解其使用磁疗床前后主观感受的变化,并测定其血色素和血尿素水平。结果显示：运动员使用磁疗床后经短期适应,伤痛、疲劳和睡眠状况等都有不同程度的改善。受试组运动员血色素水平相对于对照组有不同程度升高,血尿素水平有所下降。     

对《广韵》中个别字词的再探讨

本文将黑城出土的俄藏《广韵》残本与周祖谟的《广韵校本（附校勘记）》进行了比对校勘,对其中的个别字词提出了一些自己的商榷意见。     

检测内燃机铸件的电涡流传感器输出信号的平移调整

利用电涡流传感器检测活塞、曲轴等内燃机铸件性能时,人工调节参比件与参比线圈的相对位置,使输出与输入的关系截距变化,斜率不变,从而使输出值增大,满足预定要求。