Technical advances in dynamic imaging have enabled routine sampling and analysis of particle shape and shape distributions.Size and shape distributions are relevant to many particulate processes involving flow,spreadi...Technical advances in dynamic imaging have enabled routine sampling and analysis of particle shape and shape distributions.Size and shape distributions are relevant to many particulate processes involving flow,spreading,packing and densification.Powder bed additive manufacturing is a prime example requiring uniform spreading,packing and sintering of fine metal powders.This study focuses on quantitative representations of shape described in the International Standards Organization specifications and considers three aspects for improvement thereof: (1) reduced-order mapping of shape distributions using principal component analysis of shape descriptors;(2) uncertainty of shape distribution statistics based on pixel resolution;and (3) opportunities for analysis using machine learning for enhanced image resolution.展开更多
Recently,China-Russia Expo Graphene Application Summit Forum was held in Harbin attracting more than 100 senior experts scholars,academic leaders and core business leaders from China’s graphite-based new material fie...Recently,China-Russia Expo Graphene Application Summit Forum was held in Harbin attracting more than 100 senior experts scholars,academic leaders and core business leaders from China’s graphite-based new material fields.According to the prediction o participating experts,China’s grapheme sales will reach 10 billion yuan by 2018,the globa annual production capacity of graphene will展开更多
文摘Technical advances in dynamic imaging have enabled routine sampling and analysis of particle shape and shape distributions.Size and shape distributions are relevant to many particulate processes involving flow,spreading,packing and densification.Powder bed additive manufacturing is a prime example requiring uniform spreading,packing and sintering of fine metal powders.This study focuses on quantitative representations of shape described in the International Standards Organization specifications and considers three aspects for improvement thereof: (1) reduced-order mapping of shape distributions using principal component analysis of shape descriptors;(2) uncertainty of shape distribution statistics based on pixel resolution;and (3) opportunities for analysis using machine learning for enhanced image resolution.
文摘Recently,China-Russia Expo Graphene Application Summit Forum was held in Harbin attracting more than 100 senior experts scholars,academic leaders and core business leaders from China’s graphite-based new material fields.According to the prediction o participating experts,China’s grapheme sales will reach 10 billion yuan by 2018,the globa annual production capacity of graphene will
