高可靠性是表的设计方法

本文运用可靠性设计理论,总结出了几种高可靠性电表的设计方法。     

中美学者合成最小碳纳米管结构的富勒烯C90

近期,浙江大学和美国加利福尼亚大学科研人员成功合成世界上最小碳纳米管结构的富勒烯C90,成果发表在2010年49卷第1期的《应用化学国际版》上,被评为该期刊的“热点”论文,引起了国际科学界的广泛关注。     

水晶光电 股价未出现明显低估

老师:您好!我重仓持有水晶光电(002273)、航空动力(600893),请问如何操作?另外,恒生电子(600570)可否介入?谢谢!广州韩非韩非:水晶光电(002273):公司属电子元器件行业,主要从事光学低通滤波     

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 ℃.     

水晶光电:微投产品突破在即

公司概况水晶光电主要生产光学电子元器件,主要产品为光学低通滤波器(Optical Low Pass Filter,简称OLPF)和红外截止滤光片(IRCut Filter,简称IRCF),分别用于数码相机、手机摄像头等领域。公司的新产品包括单反相机用OLPF,晶圆级IRCF、聚光型太阳能反射镜镀膜,微型投影模块等。公司产品目前仍以光学低通滤波器和红外截止滤光片为主,两类产品占公司总收入80%以上。     

大科学工程高精密光学元器件研制的技术成熟度评价实证研究

研究大科学工程巨型激光装置建设所需的高精密光学元器件研制技术成熟度评价体系,提出光学元件研制的技术成熟度评价方法、评价等级、评价要素和评价流程。基于该体系对关键元件研制技术成熟度评价进行实证应用,评价结果对巨型激光装置的工程设计提供重要参考,降低巨型激光装置研制风险及光学元件供货对巨型激光装置研制进度的影响。     

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.     

模拟电子技术实验中的几个误区与问题分析

提出了电子技术基础实验过程中出现的一些误区，分析了实验中的一些实际问题。学生在初做实验阶段往往由于对设备和实际电路不熟，理论与实际不能很好地联系，实验中会出现一些误区，导致结果错误，甚至烧毁元件和电路，使实验无法进行。元器件的应用若不联系实际情况，电路也会出现异常。各种潜在因素都在影响着每个实验。分析和处理好这些误区和问题，才能使学生用好理论知识，不断提高实际动手能力。     

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。