The seasonal variation index (SVI) is used to fit the seasonal trend of power load.

季节变动指数(SVI)用来拟合电力负荷的季节性趋势。

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The imaging characteristics of a GRIN fiber lens with exponential variation of the constant-index surfaces are discussed based on the ray paths equations.

本文根据光线轨迹方程，讨论一种等折射率面为指数型变化的梯度折射率纤维透镜的成象特性。

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The aggregate index that appears the variation magnitude and variation speed and the variation nature is proposed to describe quantitatively the variation nature and complexity of heterogeneity.

提出了评价储层非均质性的综合评价指标，对储层非均质性的变化幅度、变化速度以及变化的随机性进行定量描述。

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There is a wide variation around the index return which at the tail can be devastating.

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That same concept can be dropped into cataloging, where even in the old days, when librarians described books within the boundaries of a physical index card, great variation still occurred.

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The remaining 10% of funds that outperformed the index can be attributed to chance variation since they did not consistently outperform over several years.

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