Talk 1

Title:Eradicating catastrophic collapse in interdependent networks via reinforced nodes

Speaker: Jianxin Pei

Abstract:

In interdependent networks, it is usually assumed, based on percolation theory, that nodes become nonfunctional if they lose connection to the network giant component. However, in reality, some nodes, equipped with alternative resources, together with their connected neighbors can still be functioning after disconnected from the giant component. Here, we propose and study a generalized percolation model that introduces a fraction of reinforced nodes in the interdependent networks that can function and support their neighborhood. We analyze, both analytically and via simulations, the order parameter—the functioning component—comprising both the giant component and smaller components that include at least one reinforced node. Remarkably, it is found that, for interdependent networks, we need to reinforce only a small fraction of nodes to prevent abrupt catastrophic collapses. Moreover, we find that the universal upper bound of this fraction is 0.1756 for two interdependent Erdos–Renyi (ER) networks: regular random (RR) networks and scale-free (SF) networks with large average degrees. We also generalize our theory to interdependent networks of networks (NONs). These findings might yield insight for designing resilient interdependent infrastructure networks.

Supervisor: Kexian Zheng, Jiaxing Chen

Talk 2

Title:基于图像的环境光照渲染

Speaker: Jiao Ouyang

Abstract:

基于图像的环境光照渲染,就是将整个周围的环境光照缓存到一张纹理中,对环境光照的计算转换为对一个纹理的查询,通过使用全局光照模型,使得渲染的效果更加贴近物理世界,渲染的更加真实,使用预计算加速对光照的计算。

Supervisor: Xiao Liang, Niting Wang

 

Time:16:00  December 12, 2019

Address:MingLi Buliding C1102

Chair:Ke Wang