Since the oil analysis data were non-stationary and non-equal time-interval time se - ries in general, which were difficult to analyze.
由于油液分析数据通常是非平稳且非等时间间隔时序，给分析工作带来困难。
2
The quality of concrete is hard to control in the reinforced concrete frame structures because there are non-equal-concrete-strength beam and column joints.
在现浇钢筋混凝土框架结构中，由于梁柱节点混凝土强度不同，此处混凝土质量难以控制。
3
In the final step, the user-defined function (UDF) itself is evaluated to filter out all false positive candidates, in other words, remove all non-equal strings.