Search Results for author: Yiwei Zhang

Found 9 papers, 2 papers with code

Generative Compression for Face Video: A Hybrid Scheme

no code implementations21 Apr 2022 Anni Tang, Yan Huang, Jun Ling, ZhiYu Zhang, Yiwei Zhang, Rong Xie, Li Song

As the latest video coding standard, versatile video coding (VVC) has shown its ability in retaining pixel quality.

Topological structures on saturated sets, optimal orbits and equilibrium states

no code implementations17 Dec 2020 Xiaobo Hou, Xueting Tian, Yiwei Zhang

Pfister and Sullivan proved that if a topological dynamical system $(X, T)$ satisfies almost product property and uniform separation property, then for each nonempty compact %convex subset $K$ of invariant measures, the entropy of saturated set $G_{K}$ satisfies \begin{equation}\label{Bowen's topological entropy} h_{top}^{B}(T, G_{K})=\inf\{h(T,\mu):\mu\in K\}, \end{equation} where $h_{top}^{B}(T, G_{K})$ is Bowen's topological entropy of $T$ on $G_{K}$, and $h(T,\mu)$ is the Kolmogorov-Sinai entropy of $\mu$.

Dynamical Systems 37C50, 37B20, 37B05, 37D45, 37C45

Precise asymptotics on the Birkhoff sums for dynamical systems

no code implementations10 Dec 2020 Lulu Fang, Hiroki Takahasi, Yiwei Zhang

We establish two precise asymptotic results on the Birkhoff sums for dynamical systems.

Dynamical Systems Probability 37A44, 37A50, 60F10

Look, Listen, and Act: Towards Audio-Visual Embodied Navigation

1 code implementation25 Dec 2019 Chuang Gan, Yiwei Zhang, Jiajun Wu, Boqing Gong, Joshua B. Tenenbaum

In this paper, we attempt to approach the problem of Audio-Visual Embodied Navigation, the task of planning the shortest path from a random starting location in a scene to the sound source in an indoor environment, given only raw egocentric visual and audio sensory data.

Factorized Multimodal Transformer for Multimodal Sequential Learning

1 code implementation22 Nov 2019 Amir Zadeh, Chengfeng Mao, Kelly Shi, Yiwei Zhang, Paul Pu Liang, Soujanya Poria, Louis-Philippe Morency

As machine learning leaps towards better generalization to real world, multimodal sequential learning becomes a fundamental research area.

Bi-Skip: A Motion Deblurring Network Using Self-paced Learning

no code implementations24 Feb 2019 Yiwei Zhang, Chunbiao Zhu, Ge Li, Yuan Zhao, Haifeng Shen

A fast and effective motion deblurring method has great application values in real life.


Detection based Defense against Adversarial Examples from the Steganalysis Point of View

no code implementations CVPR 2019 Jiayang Liu, Weiming Zhang, Yiwei Zhang, Dongdong Hou, Yujia Liu, Hongyue Zha, Nenghai Yu

Moreover, secondary adversarial attacks cannot be directly performed to our method because our method is not based on a neural network but based on high-dimensional artificial features and FLD (Fisher Linear Discriminant) ensemble.

Reinforcement Mechanism Design for e-commerce

no code implementations25 Aug 2017 Qingpeng Cai, Aris Filos-Ratsikas, Pingzhong Tang, Yiwei Zhang

We study the problem of allocating impressions to sellers in e-commerce websites, such as Amazon, eBay or Taobao, aiming to maximize the total revenue generated by the platform.

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