传统金融理论通常把收益率的方差作为风险的度量指标，并在选择证券组合时假设市场方差为常数。
We usually take variance as the index of capital market venture, and suppose that the variance of market return is a constant.
介绍了新型普朗克常数测定器的主要技术指标，并介绍了用该仪器演示光电效应现象和测定普朗克常数的方法。
This article introduces the technical index about the measurer of a new Planck constant and the methods of demonstrating photoemission phenomenon and measuring Planck constant.
方法：采用正交试验，对双氯芬酸二乙胺凝胶进行体外透皮试验，以透皮扩散速率常数为考察指标。
Method: Orthogonal design was used in transdermal test with transdermal diffusion rate constant as selection standard.
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