浅谈《电子技术基础》的学习

《电子技术基础》是学生学习和掌握现代电子信息科学与技术的一门重要基础课,作为一门技术性很强的课程,不仅要求学生很好地掌握理论知识,而且还要注重学生动手能力的培养和锻炼。     

镶嵌CdS的纳米管钛酸制备及其光催化性能研究

制备了镶嵌硫化镉的纳米管钛酸,并用透射电镜(TEM)、X射线衍射(XRD)、扩散反射(DRS)等工具进行了表征.丙烯的光催化氧化研究结果表明,镶有CdS与未镶CclS的纳米管钛酸作为光催化剂,对丙烯的光催化去除活性相近.     

Influence of Calcination Temperature on TiO2 Nanotubes＇ Catalysis for TiO2/UV/O3 in Landfill Leachate Solution

The influence of calcination temperature on TiO2 nanotubes＇ catalysis for TiO2/UV/03 was investigated. TiO2 nanotubes （TNTs） were prepared via the sol-gel method and calcined at 300--700 ℃, which were labeled as TNTs-300, TNTs-400, TNTs-500, TNTs-600 and TNTs-700, respectively. TNTs were characterized by transmission electron microscopy （TEM） and X-ray diffraction （XRD）. It is found that TNTs calcined at 400 ℃ showed the best thermal stability. When the calcination temperature increased from 400 ℃ to 700 ℃, the special structure of tubes was destroyed and gradually converted into nanorods and/or particles. The transformation from anatase to rutile occurred at 600 ℃, and the rutile phase was enhanced when the calcination temperature was increased to over 600 ℃. The calcina- tion temperature＇s influence on TNTs＇ adsorption activity for for TiO2/UV/O3 was investigated in landfill leachate solution chemical oxygen demand （COD） and catalytic activity In landfill leachate solution, the adsorption activity of COD decreased in the reduced order of TNTs-300, TNTs-400, TNTs-500, TNTs-600 and TNTs-700. In photocatalytic ozonation, TNTs-400 showed the best catalytic activity while TNTs-700 exhibited the worst. In other three processes, the COD removal of TNTs-300/UV/O3 was higher than those of TNTs-500/UV/O3 and TNTs-600/UV/O3 in the first 20 rain, and then became close to those of the latter two in the following 40 rain. Compared with TNTs-300 and TNTs- 400, TNTs-600 had the best anti-fouling activity, while TNTs-500 and TNTs-700 had lower anti-fouling activity than the former three. In photocatalytic ozonation, the calcination temperature of 400 ℃ was appropriate when TNTs were obtained at the synthesis temperature of 105 ℃.     

长袖善舞彩色商务

在爱普生(中国)有限公司，业务主要有三个方面．一是输入输出系统．二是系统设备．第三是电子元器件产品。对应的管理部门分别是信息产品营业z本部(TP)、电子元器件营业本部(ED)和系统设备营业本部(SD)。另外还有一个平行的品牌战略部，负责公司层面的品牌维护和推广。     

电子仪器设计中元器件的优化选择

讨论了现代电子仪器设计中元器件的优化选择问题。详细介绍了采用加权综合法实现元器件优选的原则、标准及评估方法。针对高可靠性电子仪器设计中的元器件选择问题,给出了基于加权综合法的极值法。     

浅谈电子元器件行业的融资问题

本文从信息产业的定义出发,根据电子元器件行业的资金需求特征运用层次分析法建立模型,从模型的权数、基本因素以及备选方案的确定,对电子元器件行业发展期的融资进行分析,得出电子元器件行业在其发展期比较适宜采用资本市场发行股票进行融资.     

智能电器设备的调试

在智能电器设备的使用过程中,调试占有重要地位。本文采用系统的方法,介绍了智能电器设备调试前的准备工作、调试工作的一般程序、调试方法与步骤以及调试的注意事项等,而每一部分又详细而有序地进行了深入的说明。     

Protel 99 SE元器件库应用研究

讨论了Protel 99 SE元器件库的创建及管理,介绍了向个人元器件库添加新的元器件的方法,包括元件属性的定义等.