We studied the density on Xinyu no. 9. The result showed that: 1 Economic yield density assume asymptote model; Economic coefficient density, exponential decay curve.

研究了新玉9号正交种的密度效应，结果表明：1经济产量—密度方程呈渐近线型，经济系数—密度方程呈指数下降型。

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The core of this model is a function called a stretched exponential relaxation, which is similar to the decay curve of a radioactive material.

这个模型的核心是延伸型指数函数的松弛效应，就像放射性物质的衰变曲线一样。

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The conclusion was the same for drug discovery after the mid-19980s: an exponential decay curve with a slope indicating we were discovering approximately 1 fewer new drugs per year.

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