In processing,wrong track rate and lost track rate are important capability indexes to judge whether the result of data fusion is satisfying.

Discusses the construction and characteristics of the vacuum system of vacuum consumable arc furnace and the importance of vacuum leakage rate to the production of titanium and Ti-alloys in accordance to their metallurgical properties.

From the Poiseuille viscose flow law,the relationship of the leak quantity,the leak hole size,the physical properties of liquor and the spurting time was discussed,and the expression of leakage rate of liquor was derived.

So, the requirements for leakage rate is very strict to the heat sink, especially the severe requirement for leakage detection during its fabricating process.

Difference between leak rate and rate of pressure rise of high vacuum valve;

Effect of stress relaxation on the leak rate of the orbicular seal joint

The general method of calculating leak rate is no longer valid.

The detecting (equipent,)parameter calculation,and test step about the methods of breathability coefficient and leakage ratio of sulfur hexafluoride are introduced in detail.

According to the statastics, some kinds of emergency by seepage such as dam body saturating and muddy water leaking out from loopholes can lead to serious dangers and are in a high pacentage.