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本文介绍一种加约束方程的Kirby表达式,在(273.15～30)K温区内国际实用温标的次级复现获得十分满意的结果,比已发表的各种方案的准确度可提高3～5倍,在上述温区内与IPTS-68的差异不大于(2～3)mK。
In this paper, Kirby expression of a constrained equation is introduced. The results of the second order recurrence of international practical temperature scale in the temperature range of (273.15 ~ 30) K are very satisfactory. The accuracy of the proposed schemes can be improved by 3 ~ 5 times the difference between IPTS-68 and IPT-68 in the above temperature range is not greater than (2 ~ 3) mK.