Through analysis of the field scale samples in Wuqi oilfield by X-ray diffraction method, scaling causes and scale control measures are studied in downhole and gathering system.
采用X -射线衍射方法分析了吴旗油田现场垢样成分，进而研究了吴旗油田井下及集输系统结垢原因和防垢措施。
To overcome the limitation of ESD on model scale control, this thesis proposes a ESD-based modular theory and studies the method of transformation between ESD and probability influence diagram.
针对ESD模型规模控制方面的局限，提出了基于ESD的模块化原理，研究了ESD与概率影响图的转化方法；
The design method and realization of measurement scale control system used to match material in chemical production was introduced. The configuration and LAD programming were based on the S7-300 PLC.
介绍在化工生产中加料用的计量秤控制系统的设计方法及在S7- 300PLC上进行组态、编程的实现过程。
Historical City Form. Residential Houses. Protection. Scale. Historical Scale. Scale Control.
城市历史形态。居住建筑。保护。尺度。历史尺度。尺度控制。
Historical City Form. Residential Houses. Protection. Scale. Historical Scale. Scale Control.
城市历史形态。居住建筑。保护。尺度。历史尺度。尺度控制。
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