形态学算子在图像处理中的应用

将腐蚀、膨胀算子经过有效组合,形成了一个性能优良的滤波算子,同时介绍了在冲击噪声的去噪中表现出显著效果的Extrema killer算子。提出了一种基于数学形态学的边缘检测算法,该算法先用一个较小尺度的结构元素进行腐蚀,后用一个较大尺度结构元素进行膨胀,用（fθB1） B2-f作为边缘检测算子。实验证明用所给算法进行图像边缘检测,能较好地保持图像的细节特征,同时能有效的抑制噪声。     

全局参考面在零件装配中的应用

文中分析了参考面的类型及Solid Edge全局参考面的创建方法，探讨了在Sohd Edge装配环境下，针对一些不能选择面的零件，利用全局参考面实现精确装配的方法。     

The educational-cultural edge: A participative learning environment for co-emergence of personal and institutional growth

The paper addresses the failure of the Professional Development Schools movement in bridging the cultural gap, existing between schools and academic institutions. A model, based on the ‘ecological edge’, is suggested. It is believed that this metaphor has a higher potential for constructing collaborative communities because of the unique nature of ecological edges as environments of growth and change. The paper describes an edge community that was constructed between a school and a teacher education program, the new grounded understandings and knowledge that emerged within this community and the diffusion of these to the core institutions. The concept of boundary objects is suggested as the medium through which new understandings are promoted.