Processing and properties of engineering plastics recycled from waste electrical and electronic equipment (WEEE)

The characteristics of engineering plastics used in the preparation of electrical and electronic equipment were studied. More specifically, their thermal response was recorded by DSC experiments, the rheological properties were investigated via MFI tests and the mechanical properties were evaluated with tensile tests. The aim was to establish a procedure for recycling the same engineering plastics deriving from waste of electrical and electronic equipment (WEEE), which offers the additional advantage of using the as-received waste stream as a recyclable mixture, i.e. without sorting and classification of its components.The experimental results showed that blends of PC with ABS or ABS/HIPS can be prepared by direct mixing and this, would allow easy handling of the engineering plastics coming from WEEE, i.e. blending without the need of sorting. These mixtures can be easily processed and display acceptable mechanical properties with reasonable cost. Therefore, the processing characteristics and properties of the systems studied in this work could be the key for the design of an interesting approach for handling solid plastic waste from electrical and electronic devices.     

Bonus or flat wage? An experiment into the principal-agent problem

We conduct a simple principal-agent experiment in order to find the effects of information asymmetry on compensation. Our aim is the analysis of the appropriate compensation and its impact on employee’s effort. Furthermore we want to compare the offered compensation and the supplied effort in the version without communication and we want to know whether the experimental observations are consistent with the theoretical considerations.The experimenters found out that compensations observed during the experiment were different from those suggested by the theory and although they were theoretically not enough to induce high effort, we could observe high performance supplied by the agents.     

电子专用设备模块化设计的研究

论述了模块化设计方法及电子专用设备设计的实际特点,并结合模块化设计在电子专用设备研制中的实际应用,阐明了模块化设计的实用性和指导性以及现实意义。     

虚拟机在课程实验中应用综述

高校教育中对实际操作能力要求越来越高,但现实情况是由于受到设备和资金方面的制约很多课程的实验教学达不到课程要求。利用虚拟机可以解决实验中设备不足的局面,完成教学要求。     

HP83480数字通信分析仪的硬件测量算法

参数测量主要指对波形特性，如上升时间、下降时间、过冲、周期、脉冲波形或眼图的幅度等。掩码测量将波形与预定掩码比较。眼参数测量是专用于眼图性质的测量，如眼高、眼宽、抖动、交叉高度和消光比等。     

旋转流体实验设备改造

论述了旋转流体实验装置改造所存在的问题及改进的措施。     

关于通信设备的直流电缆截面的选择

目前正在运行的通信设备的直流电缆截面太大,安装和维护时施工困难,浪费投资,而且实际的负载电流偏小,压降很低.希望设计单位和设备厂家能够对通信设备的电压降重新进行整定和计算,将电缆截面降低到最小程度.在不影响设备正常运行的条件下,降低施工难度、节省投资.     

电子设备故障诊断专家系统的设计

介绍了大型电子设备故障诊断专家系统的作用 ,阐述了该系统的软件设计、具体要求、功能及任务     

实现装备技术保障资源可视化的方案研究

为适应未来高技术条件下的局部战争，赢得战争的主动权，依靠GPS(全球定位系统)的定位功能和GSM(全球移动通讯系统)网、移动通讯车的通讯功能，结合实际情况和未来战场装备保障的发展趋势，设计了一个可视化方案。     

浅析退锡铅制程

文章主要介绍退锡铅制程的原理、制程问题的解决方法以及设备的设计的注意事项。