约瑟夫森效应及其应用的探讨

介绍约瑟夫森效应的内容，对直流约瑟夫森妙应和交流约瑟夫森效应的原理、特点及应用进行深入探讨，扼要介绍约瑟森效应的研究现状与发展趋势。     

谐振式隧穿磁强计的理论研究

分析了隧道扫描显微镜和隧穿磁强计的区别,认为隧穿磁强计的隧尖不需要也不应该过尖.研究了隧道间隙和隧道电流的关系.研究表明,虽然按照隧道效应理论,隧道间隙和隧道电流应该成指数关系,但对隧穿磁强计而言,其隧道电流和隧道间隙的关系可以近似看作线性关系.推导了谐振式隧穿磁强计的灵敏度计算公式.     

Improving the Economic Values of the Recycled Plastics Using Nanotechnology Associated Studies

Recycled polystyrene （PS） cups were chopped up and separately incorporated with multiwall carbon nanotubes （MWCNTs） and NiZn ferrite （Ni0.6Zn0.4Fe2O4） nanoparticles prior to electrospinning under different conditions. These nanoscale inclusions were initially dispersed well in dimethylformamide （DMF）, and then known amounts of the recycled PS pieces were added to the dispersions prior to 30 min of sonication followed by 4 h of high-speed agitation at 750 r/min. The thermal, dielectric, surface hydrophobic, and magnetic properties of the resultant nanocomposite fibers were determined by thermal comparative, capacitance bridge, vibrating sample magnetometer （VSM）, and goniometer techniques, respectively. Test results confirmed that the physical properties of recycled nanofibers were significantly increased as a function of the inclusion concentrations, which may be because of their excellent properties. The consumption of polymeric products as well as their waste materials has dramatically grown worldwide. Although plastic recycling, reprocessing, and reusing rates are growing, the physical properties and economic value of recycled plastics are significantly low. Consequently, this work provides a detailed explanation of how to improve recycled plastics, making them into highly valued new nanoproducts for various industrial applications, including filtration, textile, transportation, construction, and energy.     

磁通门磁强计用于测量磁性材料内禀矫顽力的改进措施

用磁通门磁强计测量磁性材料内禀矫顽力(如图1所示),是将由两个磁通门探头(或霍尔探头)构成的两个差分磁通敏感探头放置在螺线管外面,而这两个探头和磁强计连接,被测试样放在螺线管中部,螺线管在反向电流磁场作用下使试样退磁,当磁化强度为零肘,磁强计的示值指示为零,从而测定该试样的矫顽力。但是这种磁强计的示值是否为零是     

磁强计校验装置

本文介绍了磁强计校验装置的设计，制做，检测和电路原理，采用数字读数的方式用测电流的方法直接显示磁场值，目前在国内达到先进技术水平。该装置已经用于检定测试直接为国民生产服务，可进一步推广。