Search Results for author: Haobo Zhang

Found 21 papers, 5 papers with code

The phase diagram of kernel interpolation in large dimensions

no code implementations19 Apr 2024 Haobo Zhang, Weihao Lu, Qian Lin

The generalization ability of kernel interpolation in large dimensions (i. e., $n \asymp d^{\gamma}$ for some $\gamma>0$) might be one of the most interesting problems in the recent renaissance of kernel regression, since it may help us understand the 'benign overfitting phenomenon' reported in the neural networks literature.

Multi-target Detection for Reconfigurable Holographic Surfaces Enabled Radar

no code implementations17 Jan 2024 XiaoYu Zhang, Haobo Zhang, Ruoqi Deng, Liang Liu, Boya Di

Multi-target detection is one of the primary tasks in radar-based localization and sensing, typically built on phased array antennas.

Unified Near-field and Far-field Localization with Holographic MIMO

no code implementations12 Jan 2024 Mengyuan Cao, Haobo Zhang, Boya Di, Hongliang Zhang

In this paper, a unified NF and FF localization method is proposed for the RIS-enabled localization system to overcome the above issue.

Reconfigurable Holographic Surface Aided Wireless Simultaneous Localization and Mapping

no code implementations7 Jan 2024 Haobo Zhang, Ziang Yang, Hongliang Zhang, Boya Di, Lingyang Song

As a crucial facilitator of future autonomous driving applications, wireless simultaneous localization and mapping (SLAM) has drawn growing attention recently.

Autonomous Driving Simultaneous Localization and Mapping

Optimal Rates of Kernel Ridge Regression under Source Condition in Large Dimensions

no code implementations2 Jan 2024 Haobo Zhang, Yicheng Li, Weihao Lu, Qian Lin

Motivated by the studies of neural networks (e. g., the neural tangent kernel theory), we perform a study on the large-dimensional behavior of kernel ridge regression (KRR) where the sample size $n \asymp d^{\gamma}$ for some $\gamma > 0$.

regression

Understanding Deep Gradient Leakage via Inversion Influence Functions

1 code implementation NeurIPS 2023 Haobo Zhang, Junyuan Hong, Yuyang Deng, Mehrdad Mahdavi, Jiayu Zhou

Deep Gradient Leakage (DGL) is a highly effective attack that recovers private training images from gradient vectors.

Optimal Rate of Kernel Regression in Large Dimensions

no code implementations8 Sep 2023 Weihao Lu, Haobo Zhang, Yicheng Li, Manyun Xu, Qian Lin

We perform a study on kernel regression for large-dimensional data (where the sample size $n$ is polynomially depending on the dimension $d$ of the samples, i. e., $n\asymp d^{\gamma}$ for some $\gamma >0$ ).

regression

Safe and Robust Watermark Injection with a Single OoD Image

1 code implementation4 Sep 2023 Shuyang Yu, Junyuan Hong, Haobo Zhang, Haotao Wang, Zhangyang Wang, Jiayu Zhou

Training a high-performance deep neural network requires large amounts of data and computational resources.

Model extraction

On the Optimality of Misspecified Kernel Ridge Regression

no code implementations12 May 2023 Haobo Zhang, Yicheng Li, Weihao Lu, Qian Lin

In the misspecified kernel ridge regression problem, researchers usually assume the underground true function $f_{\rho}^{*} \in [\mathcal{H}]^{s}$, a less-smooth interpolation space of a reproducing kernel Hilbert space (RKHS) $\mathcal{H}$ for some $s\in (0, 1)$.

regression

Kernel interpolation generalizes poorly

no code implementations28 Mar 2023 Yicheng Li, Haobo Zhang, Qian Lin

One of the most interesting problems in the recent renaissance of the studies in kernel regression might be whether the kernel interpolation can generalize well, since it may help us understand the `benign overfitting henomenon' reported in the literature on deep networks.

regression

A Privacy-Preserving Hybrid Federated Learning Framework for Financial Crime Detection

1 code implementation7 Feb 2023 Haobo Zhang, Junyuan Hong, Fan Dong, Steve Drew, Liangjie Xue, Jiayu Zhou

Developing a mechanism for battling financial crimes is an impending task that requires in-depth collaboration from multiple institutions, and yet such collaboration imposed significant technical challenges due to the privacy and security requirements of distributed financial data.

Federated Learning Privacy Preserving

Reconfigurable Holographic Surface: A New Paradigm to Implement Holographic Radio

no code implementations28 Dec 2022 Ruoqi Deng, Yutong Zhang, Haobo Zhang, Boya Di, Hongliang Zhang, Lingyang Song

Ultra-massive multiple-input multiple-output (MIMO) is one of the key enablers in the forthcoming 6G networks to provide high-speed data services by exploiting spatial diversity.

Holographic Integrated Sensing and Communications: Principles, Technology, and Implementation

no code implementations16 Nov 2022 Haobo Zhang, Hongliang Zhang, Boya Di, Lingyang Song

We first introduce the hardware structure and working principle of the RHS and then propose a novel holographic beamforming scheme for ISAC.

MetaRadar: Multi-target Detection for Reconfigurable Intelligent Surface Aided Radar Systems

no code implementations25 Feb 2022 Haobo Zhang, Hongliang Zhang, Boya Di, Kaigui Bian, Zhu Han, Lingyang Song

To address this issue, we propose to use the reconfigurable intelligent surface (RIS) to improve the detection accuracy of radar systems due to its capability to customize channel conditions by adjusting its phase shifts, which is referred to as MetaRadar.

From Deterioration to Acceleration: A Calibration Approach to Rehabilitating Step Asynchronism in Federated Optimization

1 code implementation17 Dec 2021 Feijie Wu, Song Guo, Haozhao Wang, Zhihao Qu, Haobo Zhang, Jie Zhang, Ziming Liu

In the setting of federated optimization, where a global model is aggregated periodically, step asynchronism occurs when participants conduct model training by efficiently utilizing their computational resources.

Joint Progressive and Coarse-to-fine Registration of Brain MRI via Deformation Field Integration and Non-Rigid Feature Fusion

1 code implementation25 Sep 2021 Jinxin Lv, Zhiwei Wang, Hongkuan Shi, Haobo Zhang, Sheng Wang, Yilang Wang, Qiang Li

Registration of brain MRI images requires to solve a deformation field, which is extremely difficult in aligning intricate brain tissues, e. g., subcortical nuclei, etc.

MetaLocalization: Reconfigurable Intelligent Surface Aided Multi-user Wireless Indoor Localization

no code implementations18 Nov 2020 Haobo Zhang, Hongliang Zhang, Boya Di, Kaigui Bian, Zhu Han, Lingyang Song

As the RIS is able to customize the radio channels by adjusting the phase shifts of the signals reflected at the surface, the localization accuracy in the RIS aided scheme can be improved by choosing the proper phase shifts with significant differences of RSS values among adjacent locations.

Indoor Localization

Multilingual Approach to Joint Speech and Accent Recognition with DNN-HMM Framework

no code implementations22 Oct 2020 Yizhou Peng, Jicheng Zhang, Haobo Zhang, HaiHua Xu, Hao Huang, Eng Siong Chng

Experimental results on an 8-accent English speech recognition show both methods can yield WERs close to the conventional ASR systems that completely ignore the accent, as well as desired AR accuracy.

speech-recognition Speech Recognition +1

MetaRadar: Indoor Localization by Reconfigurable Metamaterials

no code implementations6 Aug 2020 Haobo Zhang, Jingzhi Hu, Hongliang Zhang, Boya Di, Kaigui Bian, Zhu Han, Lingyang Song

However, in MetaRadar, it is challenging to build radio maps for all the radio environments generated by metamaterial units and select suitable maps from all the possible maps to realize a high accuracy localization.

Indoor Localization

Towards Ubiquitous Positioning by Leveraging Reconfigurable Intelligent Surface

no code implementations10 Jul 2020 Haobo Zhang, Hongliang Zhang, Boya Di, Kaigui Bian, Zhu Han, Lingyang Song

The received signal strength (RSS) based technique is widely utilized for ubiquitous positioning due to its advantage of simple implementability.

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