文中叙述了以气体分析质谱计作指示器，动态法测量渗透率的原理，实验装置与测量结果。
In this paper, it is described the principle of penetration rate measured by dynamic method, experiment set-up and the measured result, the gas mass spectrometer was taken as indicator.
项目当前的执行情况是项目未来执行情况最好的指示器，因此在项目较早期使用项目动态数据可能预测项目的成本和时间安排是否超出预期。
Current performance is best indicator of future performance and therefore using trend data it is possible to forecast cost or schedule overruns at quite an early stage in a project.
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