Rigid polyurethane foam is a polymer thermosetting heat preservation material, heat conduction coefficient 0.024 W / (m?
聚氨酯硬泡是一种高分子热固性保温材料，导热系数0.024W/（m?。
Besides, the relations between variance ratio and correlation coefficient and between W-K statistics and correlation coefficient are found.
此外，找到了方差比，W -K统计量与相关系数之间的精确关系。
The coefficient curves of R&D on technical progress show oblique "W" type, but on the whole, the economic benefits generated by R&D will get better and better.
研发投入对技术进步的系数变化曲线表现出斜向上“W”型，但从整体上看研发投入所产生经济效益会变得越来越好。
The relation between W—K statistic and correlation coefficient was built.
并找到了W—K统计量和相关系数的关系。
The relation between W—K statistic and correlation coefficient was built.
并找到了W—K统计量和相关系数的关系。
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