In order to characterize gradient structure of copolymers,gradient index was introduced into our reasearch.
梯度指数能够更直观地表现出各种不同分子内和分子间梯度分子的梯度结构特征。
参考来源 - 梯度共聚物梯度结构的表征与鉴别·2,447,543篇论文数据，部分数据来源于NoteExpress
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。
The imaging characteristics of a GRIN fiber lens with exponential variation of the constant-index surfaces are discussed based on the ray paths equations.
提出了梯度分析法，并将其与国际上通用的标准匀度指数法进行了分析和比较。
In this paper, the method of gradient was advanced and compared with the standard formation number general in the paper field.
综合了热量和水分差异的水热积指数等值线与热量梯度和水分梯度均有一定的对应性，与植被类型的对应也较好。
The isopleth of water and thermal product index not only showed better relation to thermal and water gradients but also to vegetation types.
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