毕业论文—物质磁性及其应用.doc

l 泰 山 学 院 本科毕业论文 物质磁性及其应用 徐 瑜 2008080213 专 业 名 称 物 理 学 申请学士学位所属学科 工 科 指导教师姓名、职称 吴晓梅 讲师 2012年 05月 30日 摘 要 对近几年磁技术在水处理中的研究工作进展进行了综述。内容包括利用磁的力学效应,电化学效应,核磁效应和生物效应处理污废水中污染物。由于该技术的独特性质和广泛的应用前景。加强磁场与其他多能场的综合利用,对保护环境和节约能源无疑具有重大意义。 Abstract The application and recent advances of magnetism in water treatment were summarized in this paper, covering the use of mechanics effect, electrochemistry, biological and nuclear magnetic resonance in water treatment. Due to unique properties and wide application, the magnetic field and other multi-functional fields were thought to be widely applied inenvironment protection and energy saving. The 8051 microcontroller control system consists of the traffic lights display, 8051 monolithic integrated circuits, and LED the countdown, traffic violation detection, emergency adjustment, manual mode, time as modules. In addition to the basic traffic function outside, still have time to manually set, can pass the countdown, car that forced through traffic, inspection and adjustment, transportation and processing abnormal discriminant functions. Theory shows that the system can simple, economic and effective relieves traffic, improve the crossroads capacity. This design mainly do the following aspects: one is the work of the traffic control system design, including the crossroads, specific design and system should be restricted with each function, two is that the sensor, the hardware circuit design of the circuit and the basic function and requirement. Key Words: traffic control; sensing detection; display and countdown; AT89S51  目录 1 引言 1 1.1的选题背景 1 1.2选题的现实意义 1 1.3主要研究的内容 2 2 3 2.1磁的产生 3 2.2磁性的分类 4 2.3磁性材料及其应用 6 3 磁性材料及其应用 8 3.1传统工业中的应用 8 3.1.1磁性制剂 8 3.1.2回旋加速器 9 3.2生物界和医学界的磁现象 9 3.2.1生物界的磁现象 9 3.2.2医学界的磁现象 12 3.3天文、地质、采矿、考古等领域的应用 13 3.3.1天文领域的应用 13 4 物质磁性在水处理中的应用 17 4.1程序主体设计流程 17 4.2理论基础知识 18 4.2.1定时器原理 18 4.2.2软件延时原理 19 4.2.3中断原理 19 4.2.4消抖动程序 20 附录 总电