小波变换和傅立叶变换在系统诊断中的应用

对小波变换和傅立叶变换的特点进行了简要的阐述 ,并结合具体的系统诊断实例 ,介绍了在数字滤波、数字信号分析、信号特征提取等方面的应用技术 .文中给出了采用 MATL AB语言编写的程序模块及程序运行结果 ,并绘出了各个处理阶段的波形 ,使读者能够清楚地看到两种变换的功能     

系统检测中的多通道数据采集

介绍了某系统检测中的数据采集技术,对检测的具体对象、信号类型和检测精度要求作了详细的说明.并重点介绍了所采用的高精度频率测量技术、多通道高速采集技术和快速存储数据技术.     

工业废水中磁性颗粒的富集装置设计研究

本文利用环形螺绕环内部形成的梯度磁场,提出一种利用磁化力富集(回收)悬浮于液体中的磁性颗粒的方法。该方法有望应用于工业废水中磁性颗粒的回收、净化,减少其对生态环境造成的危害。     

Segregation behavior of magnetic ions in continuous flowing solution under gradient magnetic field

The research of magnetic separation starts from magnetic solid particles to nanoparticles, and in the research progress,particles become smaller gradually with the development of application of magnetic separation technology. Nevertheless,little experimental study of magnetic separation of molecules and ions under continuous flowing conditions has been reported. In this work, we designed a magnetic device and a "layered" flow channel to study the magnetic separation at the ionic level in continuous flowing solution. A segregation model was built to discuss the segregation behavior as well as the factors that may affect the separation. The magnetic force was proved to be the driving force which plays an indispensable role leading to the segregation and separation. The flow velocity has an effect on the segregation behavior of magnetic ions,which determines the separation result. On the other hand, the optimum flow velocity which makes maximum separation is related to the initial concentration of solution.