为了解决某城际动车组正线运行时司机显示器无网压、主断路器自动跳开故障,文章分析了高压检测电路的原理及熔断器的工作特性,确定了故障的原因,并提出了相应的优化方案.试验验证和运用考核结果显示,优化后的动车组有效降低了过分相时高压电压互感器单个绕组中的涌流,提高了高压检测电路的可靠性.

分析了铁路建设物资调剂的成因,提出了铁路建设物资调剂的解决方案,以及调剂中应注意的问题.

用过硫酸钾做引发剂,通过水溶液聚合法制得了淀粉/膨润土接枝衣康酸（IA）和丙烯酰胺（AM）高吸水树脂。研究了m（AM）/m（IA）,IA,交联剂用量及引发剂用量等对吸液性能的影响。在固定反应温度70℃,反应时间为6～10 h的条件下,吸水的最佳条件为:m（AM）/m（IA）为9.3∶0.7,IA中和度为75%,交联剂质量为单体总质量的0.05%,引发剂过硫酸钾（KPS）质量是单体总质量的0.30%。吸生理盐水的最佳条件为:m（AM）/m（IA）为9.1∶0.9,IA中和度为75%,交联剂质量为单体总质量的0.03%,引发剂KPS质量是单体总质量的0.50%。

Chemical microstructure of the BSPIAM superabsorbent omposite is tested by scanning electron microscope analysis. On the surface of BSPIAM and SPIAM without bentonite, the large number of composite resin layers is observed. It can be seen that there are the large number of gaps in the inside and a larger surface area and small pores. The BSPIAM composite containing bentonite can be seen the the gap is more fluffy. The reason is that the bentonite uniformly dispersed in BSPIAM and there is not an obvious bunch-aggregation. The interface of the bentonite/SPIAM is rather fuzzy.

Starch/bentonite grafted itaconic acid(IA)-acrylamide(AM) superabsorbent(SBPIAAM)is prepared by solution polymerization method with potassium persulfate as initiator.The influence of the ratio of itaconic acid and acrylamide,the neutralization degree of itaconic acid,the crosslinker and initiator dosage on the swelling performance of SBPIAAM is investigated.The optimum reaction condition is shown as follows:9.1∶0.9 of the ratio of acrylamide and itaconic acid by mass,70% of the neutralization degree of itaconic acid,0.05% of crosslinker and 0.3% initiator(ratio to the monomer by mass),70℃ of the temperature and 6-10 hours of the reaction time.