The authors introduce in detail the control target and drawing method of this kind of chart and, by way of example, explain the uses of the chart and the large financial profit achieved.
Simultaneously, the query method is based on tree control and simple joint chart to save time.
同时，采用了基于树控件和基本连接图相结合的图形化查询方法。
3
In this paper, the problem of using automatic air monitoring system for the quality controlchart was discussed and improved quality control of the mapping method was present.