A novel algorithm for skeleton extraction is proposed in the paper. By numbering objeet＇s border dements on spatial position, the border gap （BG） of inner pixel of the object is calculated; an 8-connected medial-ax...A novel algorithm for skeleton extraction is proposed in the paper. By numbering objeet＇s border dements on spatial position, the border gap （BG） of inner pixel of the object is calculated; an 8-connected medial-axis hierarchy is derived by the BG; a thinning method including slicing and counting is proposed to improve the processing speed; branches with minor importance are truncated by vector diversity Vd and length-width ratio （LWR） with support vector machine （SVM） classifier. Experiments demonstrate that the derived skeletons keep good connectivity, especially in long and narrow area.展开更多
利用CFPS(China family panel studies,中国家庭追踪调查)的混合截面数据,采用熵值法测度跨境电商发展水平,分析跨境电商发展对性别收入差距的影响及其内在作用机制。研究发现,跨境电商主要通过两个渠道显著缩小性别收入差距:一是就业效...利用CFPS(China family panel studies,中国家庭追踪调查)的混合截面数据,采用熵值法测度跨境电商发展水平,分析跨境电商发展对性别收入差距的影响及其内在作用机制。研究发现,跨境电商主要通过两个渠道显著缩小性别收入差距:一是就业效应,即提供女性就业机会;二是晋升效应,即拓展女性职业发展空间。异质性分析进一步表明,跨境电商的收入平等化效应在低技能劳动力群体中表现尤为突出,但在不同婚姻状况群体中未呈现显著差异。基于此,提出推动跨境电商包容性发展、完善有利于女性发展的跨境电商制度与政策环境等建议。展开更多
文摘A novel algorithm for skeleton extraction is proposed in the paper. By numbering objeet＇s border dements on spatial position, the border gap （BG） of inner pixel of the object is calculated; an 8-connected medial-axis hierarchy is derived by the BG; a thinning method including slicing and counting is proposed to improve the processing speed; branches with minor importance are truncated by vector diversity Vd and length-width ratio （LWR） with support vector machine （SVM） classifier. Experiments demonstrate that the derived skeletons keep good connectivity, especially in long and narrow area.
文摘利用CFPS(China family panel studies,中国家庭追踪调查)的混合截面数据,采用熵值法测度跨境电商发展水平,分析跨境电商发展对性别收入差距的影响及其内在作用机制。研究发现,跨境电商主要通过两个渠道显著缩小性别收入差距:一是就业效应,即提供女性就业机会;二是晋升效应,即拓展女性职业发展空间。异质性分析进一步表明,跨境电商的收入平等化效应在低技能劳动力群体中表现尤为突出,但在不同婚姻状况群体中未呈现显著差异。基于此,提出推动跨境电商包容性发展、完善有利于女性发展的跨境电商制度与政策环境等建议。
