有机半导体LPPP光微腔调谐发光器件的研究

研究了有机半导体ＬＰＰＰ光微腔调发光二极管光致发光的性质，经过对电极的改进不仅能发射红绿蓝三色光而且使发光峰宽度大为减小。     

可实现的无源电抗二端对梯形网络的充要条件

本文对可实现的无源电抗二端对梯形网络的充分必要条件进行了归纳和论证,最后通过举例来验证其正确性。     

PLC多组分液体混合控制系统

本文介绍了一种基于三菱Fx系列PLC可编程控制器的液体混合系统技术路线,给出了软件设计和硬件设计原理图。实践证明采用该程序设计软件代替传统的继电控制,不仅可大大提高生产效率,而且可进行在线调试,并且方便功能的改进,降低系统故障率。     

The effect of instructions on potential slide-out failures during portable extension ladder angular positioning

Accidents involving portable ladders are a common cause of serious occupational and non-occupational injuries throughout the industrialized world. Many of these injuries could be prevented with better instruction on the proper usage of portable ladders. Research is reported that focused on both the human factors and engineering aspects of portable extension ladder usage based on common ladder setup procedures. Results of the human factors experiment revealed evidence of unsafe acts that could lead to catastrophic ladder slide-out accidents in real-life situations. Six different ladder setup methods were evaluated for safety and stability based on placement angles: the basic, 75 degree, stand–reach, L sticker, 4:1, and bubble level methods. Ideally, ladder users would set the ladder up at 75.5 degrees to achieve the consensus industry standard safest angle. Setup methods varied in complexity and nature of instruction. The level method produced the most accurate and the least variable results. The engineering analysis determined the coefficient of friction of a variety of clean and contaminated surfaces commonly used with ladders. This analysis determined the total number of slide-out failures that would likely have occurred in the data obtained in each of the ladder setup methods tested in the human factors experiment. Based on test participants’ setup angles, the average calculated ladder slide-out failure rate was 8.7 percent for ladders positioned on a surface with the lowest measured coefficient of friction. When broken down by ladder setup method, the 4:1 method had a failure rate of 18.8 percent, the 75 degree method had a failure rate of 15.2 percent, and the basic method had a failure rate of 9.8 percent. The stand–reach and L sticker methods had identical failure rates at 3.3 percent and the level method was best at 1.1 percent. The level method provided the lowest error, least variability, and setup closest to the target angle of 75.5 degrees. Analysis of the overall results revealed the need for additional user training and clearer instructions affixed to ladders. This research is unique in that it combines an analysis and comparison of human factors and engineering in the same study.     

PLC在高压风机控制中的应用

介绍了日本松下公司FP1-C24系列PLC在高压风机控制中的应用,提出了高压风机电气控制的软、硬件设计。通过验证,采用先进的PLC控制取代传统的接触器-继电器控制,使高压风机运行可靠性及效率大为提高。     

一种新型Ka波段盒型窗

本文介绍了一种新型Ka波段盒型窗,并利用HFSS进行仿真优化,得到在32.6～39.6 GHz带宽内S11低于-20dB的无鬼模振荡输出,与标准的半波长厚度的介质窗片相比,其与圆波导接触面积较大,更有利于散热。     

防脱落绝缘梯子头的研制与应用

结合带电作业工作需要,讨论梯子头在带电作业中的应用情况,分析了目前所使用梯子头的优缺点,提出地面控制梯子头防脱落闭锁装置的改进方法,填补了梯子头在应用安全方面的技术空白.     

金基焊料的典型应用分析及其可替代材料

着重讨论了金基焊料在阶梯焊,在陶瓷耐压绝缘性要求较高的情况以及能量输出窗焊接中的应用,并简要探讨了金基可替代焊料。     

阶梯垫检修工艺的创新

介绍了鞍钢2150精轧机组阶梯垫检修的工艺创新。     

梯形图转语句表的等效网络合并方法研究

目前常用梯形图转语句表方法有拓扑排序、二叉树、广义表、串并联归并等,但在梯形图编辑软件中难于直接同图形编辑的描述对应起来,编程难度也较大。为解决这些问题,提出了一种等效网络合并方法,采用一个矩阵和相关的PLC梯形图符号来描述一个梯形图,并用一种类似于电阻网络的合并算法来实现梯形图的合并,变成一个最简化的合并图,然后再从该合并图生成语句表。该方法在编辑软件中梯形图的描述与转语句表运算采用完全相同的数据结构,并可从编辑软件中动态绘制梯形的合并过程,具有直观、易于理解、易于编程等优点。