Search Results for author: Hao Ni

Found 24 papers, 11 papers with code

GCN-DevLSTM: Path Development for Skeleton-Based Action Recognition

1 code implementation22 Mar 2024 Lei Jiang, Weixin Yang, Xin Zhang, Hao Ni

Skeleton-based action recognition (SAR) in videos is an important but challenging task in computer vision.

Action Recognition Dimensionality Reduction +1

Part-Aware Transformer for Generalizable Person Re-identification

1 code implementation ICCV 2023 Hao Ni, Yuke Li, Lianli Gao, Heng Tao Shen, Jingkuan Song

Based on the local similarity obtained in CSL, a Part-guided Self-Distillation (PSD) is proposed to further improve the generalization of global features.

Domain Generalization Generalizable Person Re-identification

Generative Modelling of Lévy Area for High Order SDE Simulation

no code implementations4 Aug 2023 Andraž Jelinčič, Jiajie Tao, William F. Turner, Thomas Cass, James Foster, Hao Ni

In this paper, we propose L\'{e}vyGAN, a deep-learning-based model for generating approximate samples of L\'{e}vy area conditional on a Brownian increment.

Minimally-Supervised Speech Synthesis with Conditional Diffusion Model and Language Model: A Comparative Study of Semantic Coding

no code implementations28 Jul 2023 Chunyu Qiang, Hao Li, Hao Ni, He Qu, Ruibo Fu, Tao Wang, Longbiao Wang, Jianwu Dang

However, existing methods suffer from three problems: the high dimensionality and waveform distortion of discrete speech representations, the prosodic averaging problem caused by the duration prediction model in non-autoregressive frameworks, and the information redundancy and dimension explosion problems of existing semantic encoding methods.

Language Modelling Speech Synthesis

A Neural RDE-based model for solving path-dependent PDEs

no code implementations1 Jun 2023 Bowen Fang, Hao Ni, Yue Wu

The concept of the path-dependent partial differential equation (PPDE) was first introduced in the context of path-dependent derivatives in financial markets.

PCF-GAN: generating sequential data via the characteristic function of measures on the path space

1 code implementation NeurIPS 2023 Hang Lou, Siran Li, Hao Ni

Generating high-fidelity time series data using generative adversarial networks (GANs) remains a challenging task, as it is difficult to capture the temporal dependence of joint probability distributions induced by time-series data.

Time Series Time Series Generation

NODE-ImgNet: a PDE-informed effective and robust model for image denoising

1 code implementation18 May 2023 Xinheng Xie, Yue Wu, Hao Ni, Cuiyu He

Inspired by the traditional partial differential equation (PDE) approach for image denoising, we propose a novel neural network architecture, referred as NODE-ImgNet, that combines neural ordinary differential equations (NODEs) with convolutional neural network (CNN) blocks.

Image Denoising

Parameter-Efficient Conformers via Sharing Sparsely-Gated Experts for End-to-End Speech Recognition

no code implementations17 Sep 2022 Ye Bai, Jie Li, Wenjing Han, Hao Ni, Kaituo Xu, Zhuo Zhang, Cheng Yi, Xiaorui Wang

Experimental results show that the proposed model achieves competitive performance with 1/3 of the parameters of the encoder, compared with the full-parameter model.

Knowledge Distillation speech-recognition +1

Path Development Network with Finite-dimensional Lie Group Representation

1 code implementation2 Apr 2022 Hang Lou, Siran Li, Hao Ni

To tackle this problem, we propose a novel, trainable path development layer, which exploits representations of sequential data with the help of finite-dimensional matrix Lie groups.

Forex Trading Volatility Prediction using Neural Network Models

no code implementations2 Dec 2021 Shujian Liao, Jian Chen, Hao Ni

In this paper, we investigate the problem of predicting the future volatility of Forex currency pairs using the deep learning techniques.

Sig-Wasserstein GANs for Time Series Generation

1 code implementation1 Nov 2021 Hao Ni, Lukasz Szpruch, Marc Sabate-Vidales, Baoren Xiao, Magnus Wiese, Shujian Liao

Synthetic data is an emerging technology that can significantly accelerate the development and deployment of AI machine learning pipelines.

Time Series Time Series Analysis +1

Logsig-RNN: a novel network for robust and efficient skeleton-based action recognition

1 code implementation25 Oct 2021 Shujian Liao, Terry Lyons, Weixin Yang, Kevin Schlegel, Hao Ni

In this paper, we propose a novel module, namely Logsig-RNN, which is the combination of the log-signature layer and recurrent type neural networks (RNNs).

Action Recognition In Videos Skeleton Based Action Recognition +3

An efficient representation of chronological events in medical texts

no code implementations EMNLP (Louhi) 2020 Andrey Kormilitzin, Nemanja Vaci, Qiang Liu, Hao Ni, Goran Nenadic, Alejo Nevado-Holgado

In this work we addressed the problem of capturing sequential information contained in longitudinal electronic health records (EHRs).

Conditional Sig-Wasserstein GANs for Time Series Generation

2 code implementations9 Jun 2020 Shujian Liao, Hao Ni, Lukasz Szpruch, Magnus Wiese, Marc Sabate-Vidales, Baoren Xiao

The signature of a path is a graded sequence of statistics that provides a universal description for a stream of data, and its expected value characterises the law of the time-series model.

Time Series Time Series Analysis +1

Signature features with the visibility transformation

no code implementations8 Apr 2020 Yue Wu, Hao Ni, Terence J. Lyons, Robin L. Hudson

In this paper we put the visibility transformation on a clear theoretical footing and show that this transform is able to embed the effect of the absolute position of the data stream into signature features in a unified and efficient way.

Position

Simultaneous Left Atrium Anatomy and Scar Segmentations via Deep Learning in Multiview Information with Attention

no code implementations2 Feb 2020 Guang Yang, Jun Chen, Zhifan Gao, Shuo Li, Hao Ni, Elsa Angelini, Tom Wong, Raad Mohiaddin, Eva Nyktari, Ricardo Wage, Lei Xu, Yanping Zhang, Xiuquan Du, Heye Zhang, David Firmin, Jennifer Keegan

Using our MVTT recursive attention model, both the LA anatomy and scar can be segmented accurately (mean Dice score of 93% for the LA anatomy and 87% for the scar segmentations) and efficiently (~0. 27 seconds to simultaneously segment the LA anatomy and scars directly from the 3D LGE CMR dataset with 60-68 2D slices).

Anatomy Segmentation

Multiview Two-Task Recursive Attention Model for Left Atrium and Atrial Scars Segmentation

no code implementations12 Jun 2018 Jun Chen, Guang Yang, Zhifan Gao, Hao Ni, Elsa Angelini, Raad Mohiaddin, Tom Wong, Yanping Zhang, Xiuquan Du, Heye Zhang, Jennifer Keegan, David Firmin

Late Gadolinium Enhanced Cardiac MRI (LGE-CMRI) for detecting atrial scars in atrial fibrillation (AF) patients has recently emerged as a promising technique to stratify patients, guide ablation therapy and predict treatment success.

Anatomy Segmentation

Developing the Path Signature Methodology and its Application to Landmark-based Human Action Recognition

no code implementations13 Jul 2017 Weixin Yang, Terry Lyons, Hao Ni, Cordelia Schmid, Lianwen Jin

To this end, we regard the evolving landmark data as a high-dimensional path and apply non-linear path signature techniques to provide an expressive, robust, non-linear, and interpretable representation for the sequential events.

Action Classification Action Recognition In Videos +1

Learning Spatial-Semantic Context with Fully Convolutional Recurrent Network for Online Handwritten Chinese Text Recognition

no code implementations9 Oct 2016 Zecheng Xie, Zenghui Sun, Lianwen Jin, Hao Ni, Terry Lyons

Online handwritten Chinese text recognition (OHCTR) is a challenging problem as it involves a large-scale character set, ambiguous segmentation, and variable-length input sequences.

Handwritten Chinese Text Recognition Language Modelling +1

Cascading Bandits for Large-Scale Recommendation Problems

1 code implementation17 Mar 2016 Shi Zong, Hao Ni, Kenny Sung, Nan Rosemary Ke, Zheng Wen, Branislav Kveton

In this work, we study cascading bandits, an online learning variant of the cascade model where the goal is to recommend $K$ most attractive items from a large set of $L$ candidate items.

Multi-Armed Bandits Recommendation Systems +1

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