Title
On Geometric Structure of Activation Spaces in Neural Networks.
Abstract
In this paper, we investigate the geometric structure of activation spaces of fully connected layers in neural networks and then show applications of this study. We propose an efficient approximation algorithm to characterize the convex hull of massive points in high dimensional space. Based on this new algorithm, four common geometric properties shared by the activation spaces are concluded, which gives a rather clear description of the activation spaces. We then propose an alternative classification method grounding on the geometric structure description, which works better than neural networks alone. Surprisingly, this data classification method can be an indicator of overfitting in neural networks. We believe our work reveals several critical intrinsic properties of modern neural networks and further gives a new metric for evaluating them.
Year
Venue
DocType
2019
arXiv: Learning
Journal
Volume
Citations 
PageRank 
abs/1904.01399
0
0.34
References 
Authors
0
6
Name
Order
Citations
PageRank
Yuting Jia193.51
Haiwen Wang200.68
Shuo Shao300.68
Huan Long423.75
Yunsong Zhou500.34
Xinbing Wang62642214.43