基于S3C44B0X的Microwindows在远程红外抄表器中的应用

本文详细阐述了Mcrowindows在S3C44B0X上的应用,最后给出了Mcrowindows在远程红外抄表器中的应用。     

Grain refinement and improved properties through electromagnetic stirring in AI alloy MIG welds

This paper described the effects of external excitatory parameters of current and frequency on the microstructure and mechanical properties of weld metal in M1G welding with longitudinal electromagnetic field. With a high speed video camera capturing the images of arc shape, the mechanism of arc rotation and how the periodic contraction and expansion of arc affected the movement of molten pool were investigated. The technique resulted in fine equiaxed grains in weld metal and optimum parameters of electromagnetic stirring were suggested based on the extent of refinement. Fine-grained weld metal exhibited better yield strength and significant improvement in elongation.     

外加磁场对MIG焊熔滴过渡形式和焊缝组织性能的影响

利用Phtron512×512高速摄像机拍摄MIG焊熔滴过渡的方法,研究了纵向磁场脉冲MIG焊接铝合金熔滴过渡形式变化的规律和原因.熔滴过渡不仅与焊接电流、电弧电压有关,而且外加纵向磁场的电流和磁场频率也显著影响熔滴过渡方式.在焊接电流大于临界电流值时,通过改变外加磁场的电流和频率可以获得喷射过渡和旋转过渡.激磁电流和磁场频率需要恰当匹配,而且还必须与焊接参数相适应,才能保证获得稳定的熔滴过渡形式和最佳的晶粒细化效果.试验结果表明,焊缝金属的抗拉强度、断后伸长率及焊接接头的冲击吸收能量得到显著提高,改善了焊缝的接头强度和塑性.     

基于S3C44BOX的Microwindows在远程红外抄表器中的应用

本文详细阐述了Mcrowindows在S3C44BOX上的应用，最后给出了Mcrowindows在远程红外抄表器中的应用。     

用Intranet建立工程成本控制与核算网络系统

随着局域网技术日趋成熟,计算机网络在企业管理中将会起到重要作用。对市政工程施工企业利用局域网技术建立成本控制与成本核算系统实例进行了介绍。     

Influence of longitudinal magnetic field on metal transfer in MIG arc welding

Metal transfer is an important phenomenon in metal inert gas (MIG) arc welding with longitudinal alternating magnetic field. It is of great significance to observe the metal transfer modes under different excitatory currents and frequencies. However, it is very difficult to view the metal transfer process directly during welding, due to the strong interference from the arc light. To obtain the relationship between the metal transfer modes and the different magnetic fields, a high-speed video camera was used to acquire the images of globules. Different metal transfer modes under the conditions of different magnetic fields and welding parameters were studied. The experiment shows clear images of droplet transfer as well as influence of longitudinal magnetic field on both metal transfer and globule shape.     

水溶性带电聚合物黏结剂修饰炭电极用于增强电容去离子性能

电容去离子技术（capacitive deionization，CDI）是一种基于电吸附原理的新型脱盐技术，具有成本低、无污染、能耗小等优点。采用亲水性的羧甲基纤维素钠（CMC）和聚乙烯醇（PVA）黏结剂及其化学修饰得到的具有更多带电基团的磺化羧甲基纤维素（SCMC）和季铵化聚乙烯醇（QPVA）黏结剂制备活性炭电极，能进一步增强活性炭（AC）电极的亲水性和离子选择性。亲水性带电聚合物黏结剂依靠自身的电荷可以有效抑制阳极氧化的副反应，并增强离子吸附驱动力。在500 mg/L NaCl盐溶液，1.2/0 V电压下，AC-CMC//AC-PVA和AC-SCMC//AC-QPVA可分别获得14.58和17.39 mg/g的脱盐量，且在0.8/0 V电压下循环100圈之后，脱盐量的保持率分别为65.48%和80.53%。     

全球定位数字化采集在路面管理系统中的应用

随着路面管理系统（GPS）在我国公路、城市道路的广泛应用，大量的道路相关数据采集工作便成为道路管理部门所面临的主要难点。本文针对以上问题，简要介绍全球定位数字化采集系统的设计原理、技术功能、应用分析、发展方向等内容。     

青藏铁路钢梁架设

结合工程实例,对钢梁的制作、运输、安装工艺流程进行了介绍,重点对钢梁的拼装、支座的安装、拼接钢梁时高强螺栓的拧紧、钢梁的安装等施工过程进行了阐述,以供类似工程参考借鉴。