According to the low packingratio in a industry, the nonstandard tray sizes designing problem is proposed, and the SQL database techniques is applied to solve the problem.
The influence of three main factors such as lattice structure, packingratio and dielectric constant ratio on complete forbidden band of 2-d air cylindrical photonic crystal is studied.
研究了晶格结构、填充比、介电常数比三个主要因素对二维空气圆柱型光子晶体完全禁带的影响。
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The company settled upon "packing" images together by understanding their aspect ratio to create "a cohesive page while you scroll," said Marissa Mayer, VP of search products and user experience.