Under different pressures the flashing in riser of natural circulation system and its effect on flow stability were studied by the method of visual observation in synchronism with data recording.
采用可视化观察与数据同步记录分析相结合的方法，研究了不同压力条件下自然循环系统上升段中的闪蒸现象及其对自然循环稳定性的作用。
Based on many years of study, such methods as visual observation, interior extrapolation method and GPS positioning method used by look-outs for reporting fire are summarized.
通过多年的研究，总结了瞭望员安全报火的方法，即目测法、交叉法、航点法。
By adopting the method, the eye-observation visual Angle can be accurately measured to realize applications of effect evaluation such as audience ratings survey, outdoor advertising and the like.
可以实现较精确地测量人眼观察视角，以实现收视率调查和户外广告的效果评价等应用。
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