This article is devoted to clarifying the mechanism of reactive wetting and summarizing the change of wetting force of Sn-based solder and the morphology of the interfacial structure by changing the type of alloying elements added to the solder,experimental temperature and metal coating on Cu substrate.

The humidity effect in the radon exhalation rate measurement by the method of the activated charcoal absorption—γspectrometry;

Aging and humidity effects of optical surface deformation after deposition

The humidity effect, namely the markedly positive correlation between stable isotopic ratio in precipitation and dew-point deficit in atmosphere %ΔT%-d, is put forward firstly and the relationship between {δ~{18}O} in precipitation and %ΔT%-d is analyzed in this paper for the Urumqi and Kunming Stations, which climatic characteristics are completely different.