重视科技期刊目次表与正文相应内容的一致性

校阅了近几年出版的 9种科技期刊的目次表与正文的相应内容。结果表明 :差错率达 13 .5 % ,而且差错形式多种多样 ,主要问题是目次表中的题名、作者人数和顺序以及作者姓名与正文中的不一致。分析了产生这些差错的原因 ,提出了消除差错的对策。

Fault Diagnosis of Cylindrical Grinding Machine

Based on experiment modal analysis(EMA) and operation modal analysis(OMA), the dynamic characteristics of cylindrical grinding machine were measured and provided a basis for further failure analysis.The influences of grinding parameters on dynamic characteristics were studied by analyzing the diagnostic signals extracted from racing and grinding experiments.The significant frequency of 38 Hz related to grinding wheel spindle speed of 2 307 r/min showed that the wheel spindle system was in a state of imbalan...