在相对论量子力学中，作为对称算符的时间算符，其亏指数（deficiency index）是(0,0)，因而是自共轭的。这跟以下事实有关：相对论量子力学方程的一般解中，同时包含正频解和负频解两个部分。
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而流域东南部山区的大部分子流域的植被冗亏指数介于- 0.10到0.10之间，植被亏缺最轻。
However, in southeastern hilly of the basin, the indices were only between -0.10 and 0.10, the least deficiency.
通过该评价方法发现，在泾河流域西北部的大部分子流域的植被冗亏指数小于-0.2，植被亏缺较为严重；
By this method, we found that the VRD indices for most watersheds of the northwestern basin were less than -0.2, displaying a severe vegetation deficiency.
结果表明：鉴定甜瓜品种抗旱性，苗期可应用株高胁迫指数（PHSI）、干物质胁迫指数（DMSI）、叶片水分饱和亏、电解质渗出率、干旱处理伤害率等指标。
The results showed that PHSI, DMSI, WSD, electrolyte transudation ratio and injury ratio under drought treatment could be used to appraise the drought resistance of melon species at seedling stage.
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