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The surface tension of molten Sn-Bi (mole fraction X(Bi) = 0.455) alloy has been determined by the sessile drop method at oxygen partial pressure (P(O2)) of 1.0x10(-6) MPa and different temperatures. The experimental results have been analyzed and discussed, and the positive temperature coefficient of surface tension of molten Sn-Bi alloy has been(More)
In China, the problem of population aging is becoming increasingly serious. Therefore, high mortality rates diseases, such as cardiovascular disease, are a serious threat to people's health. In the present study, a system for detecting and analyzing physiological parameter was proposed. As a wearable device, it combined with the wearable terminal device and(More)
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