no code implementations • 10 Feb 2023 • Senmao Cheng, Fan Yang, Zhi Chen, Nanjun Yuan, Wenbin Tao
To our knowledge, the proposed DSeam is the first deep learning based seam prediction method for image stitching.
no code implementations • 12 Jan 2023 • Jieyu Li, Lu Chen, Ruisheng Cao, Su Zhu, Hongshen Xu, Zhi Chen, Hanchong Zhang, Kai Yu
Exploring the generalization of a text-to-SQL parser is essential for a system to automatically adapt the real-world databases.
no code implementations • 3 Jan 2023 • Haolin Ruan, Zhi Chen, Chin Pang Ho
We propose a distributionally robust return-risk model for Markov decision processes (MDPs) under risk and reward ambiguity.
2 code implementations • 19 Sep 2022 • Zijie J. Wang, Chudi Zhong, Rui Xin, Takuya Takagi, Zhi Chen, Duen Horng Chau, Cynthia Rudin, Margo Seltzer
Given thousands of equally accurate machine learning (ML) models, how can users choose among them?
2 code implementations • 16 Sep 2022 • Rui Xin, Chudi Zhong, Zhi Chen, Takuya Takagi, Margo Seltzer, Cynthia Rudin
We show three applications of the Rashomon set: 1) it can be used to study variable importance for the set of almost-optimal trees (as opposed to a single tree), 2) the Rashomon set for accuracy enables enumeration of the Rashomon sets for balanced accuracy and F1-score, and 3) the Rashomon set for a full dataset can be used to produce Rashomon sets constructed with only subsets of the data set.
no code implementations • 10 Sep 2022 • Zhi Chen, Yuncong Liu, Lu Chen, Su Zhu, Mengyue Wu, Kai Yu
The second phase is to fine-tune the pretrained model on the TOD data.
no code implementations • 7 Sep 2022 • Chong Han, Yongzhi Wu, Zhi Chen, Yi Chen, Guangjian Wang
In this article, challenges from THz channel and transceiver perspectives, as well as difficulties of ISAC are elaborated.
1 code implementation • 6 Sep 2022 • Rafael A. Moral, Zhi Chen, Shuai Zhang, Sally McClean, Gabriel R. Palma, Brahim Allan, Ian Kegel
The model drastically reduces the dimensionality of the data from thousands of observations per customer to 11 customer-level parameter estimates and random effects.
no code implementations • 5 Sep 2022 • Zhi Chen, Yadan Luo, Sen Wang, Jingjing Li, Zi Huang
We identify two key challenges in our FedZSL protocol: 1) the trained models are prone to be biased to the locally observed classes, thus failing to generalize to the unseen classes and/or seen classes appeared on other devices; 2) as each category in the training data comes from a single source, the central model is highly vulnerable to model replacement (backdoor) attacks.
no code implementations • 14 Jul 2022 • Zhaocheng Liu, Yingtao Luo, Di Zeng, Qiang Liu, Daqing Chang, Dongying Kong, Zhi Chen
Modeling users' dynamic preferences from historical behaviors lies at the core of modern recommender systems.
no code implementations • 5 Jul 2022 • Zhi Chen, Yadan Luo, Sen Wang, Jingjing Li, Zi Huang
To address this issue, we propose a novel flow-based generative framework that consists of multiple conditional affine coupling layers for learning unseen data generation.
no code implementations • 1 Jun 2022 • Yi Guo, Zhaocheng Liu, Jianchao Tan, Chao Liao, Sen yang, Lei Yuan, Dongying Kong, Zhi Chen, Ji Liu
When training is finished, some gates are exact zero, while others are around one, which is particularly favored by the practical hot-start training in the industry, due to no damage to the model performance before and after removing the features corresponding to exact-zero gates.
no code implementations • 25 May 2022 • Zhi Chen, Jijia Bao, Lu Chen, Yuncong Liu, Da Ma, Bei Chen, Mengyue Wu, Su Zhu, Xin Dong, Fujiang Ge, Qingliang Miao, Jian-Guang Lou, Kai Yu
In this work, we aim to build a unified dialogue foundation model (DFM) which can be used to solve massive diverse dialogue tasks.
no code implementations • 22 Apr 2022 • Haiyang Huang, Zhi Chen, Cynthia Rudin
Experimental results provide evidence that our method can discover multiple concepts within a single image and outperforms state-of-the-art unsupervised methods on complex datasets such as Cityscapes and COCO-Stuff.
no code implementations • SIGDIAL (ACL) 2022 • Zhi Chen, Lu Chen, Bei Chen, Libo Qin, Yuncong Liu, Su Zhu, Jian-Guang Lou, Kai Yu
With the development of pre-trained language models, remarkable success has been witnessed in dialogue understanding (DU).
1 code implementation • 28 Mar 2022 • Zhi Chen, Kun Sun, Fan Yang, Wenbing Tao
In this paper, we present a second order spatial compatibility (SC^2) measure based method for efficient and robust point cloud registration (PCR), called SC^2-PCR.
no code implementations • 25 Mar 2022 • Peilan Wang, Jun Fang, Weizheng Zhang, Zhi Chen, Hongbin Li, Wei zhang
The deployment of RIS, however, complicates the system architecture and poses a significant challenge for beam training (BT)/ beam alignment (BA), a process that is required to establish a reliable link between the transmitter and the receiver.
no code implementations • 21 Feb 2022 • Yongzhi Wu, Chong Han, Zhi Chen
Moreover, the effectiveness of the iterative method for data detection aided by superimposed pilots in DFT-s-OTFS systems is validated by the simulations and the bit error rate performance is not degraded by the Doppler effects.
no code implementations • 15 Feb 2022 • Yibing Zhan, Zhi Chen, Jun Yu, Baosheng Yu, DaCheng Tao, Yong Luo
As a result, HLN significantly improves the performance of scene graph generation by integrating and reasoning from object interactions, relationship interactions, and transitive inference of hyper-relationships.
no code implementations • 11 Feb 2022 • Limin Yang, Zhi Chen, Jacopo Cortellazzi, Feargus Pendlebury, Kevin Tu, Fabio Pierazzi, Lorenzo Cavallaro, Gang Wang
Empirically, we show that existing backdoor attacks in malware classifiers are still detectable by recent defenses such as MNTD.
no code implementations • CVPR 2022 • Zhi Chen, Kun Sun, Fan Yang, Wenbing Tao
In this paper, we present a second order spatial compatibility (SC^2) measure based method for efficient and robust point cloud registration (PCR), called SC^2-PCR.
no code implementations • CVPR 2022 • Hongzu Su, Jingjing Li, Zhi Chen, Lei Zhu, Ke Lu
In this paper, we present a novel method which leverages both visual and semantic modalities to distinguish seen and unseen categories.
1 code implementation • 28 Dec 2021 • Zhi Chen, Fan Yang, Wenbing Tao
In this paper, we propose a neural network named DetarNet to decouple the translation $t$ and rotation $R$, so as to overcome the performance degradation due to their mutual interference in point cloud registration.
no code implementations • 9 Dec 2021 • Su Zhu, Lu Chen, Ruisheng Cao, Zhi Chen, Qingliang Miao, Kai Yu
In this paper, we propose to improve prototypical networks with vector projection distance and abstract triangular Conditional Random Field (CRF) for the few-shot NLU.
1 code implementation • 10 Nov 2021 • Zhi Chen, Alexander Ogren, Chiara Daraio, L. Catherine Brinson, Cynthia Rudin
Machine learning models can assist with metamaterials design by approximating computationally expensive simulators or solving inverse design problems.
1 code implementation • 13 Oct 2021 • Fuming You, Jingjing Li, Lei Zhu, Ke Lu, Zhi Chen, Zi Huang
To address these problems, we investigate domain adaptive semantic segmentation without source data, which assumes that the model is pre-trained on the source domain, and then adapting to the target domain without accessing source data anymore.
no code implementations • 12 Oct 2021 • Zhi Chen, Nikhil Potu Surya Prakash, Roberto Horowitz
In December 2017, Seagate unveiled the Multi Actuator Technology to double the data performance of the future generation hard disk drives (HDD).
no code implementations • 12 Oct 2021 • Nikhil Potu Surya Prakash, Zhi Chen, Roberto Horowitz
Strictly Positive Real (SPR) transfer functions arise in many areas of engineering like passivity theory in circuit analysis and adaptive control to name a few.
no code implementations • 30 Sep 2021 • Yongzhi Wu, Filip Lemic, Chong Han, Zhi Chen
One step forward, THz integrated sensing and communication (ISAC) system can realize both unprecedented data rates and millimeter-level accurate sensing.
no code implementations • 25 Sep 2021 • Nikhil Potu Surya Prakash, Zhi Chen, Roberto Horowitz
Multi Actuator Technology in Hard Disk drives (HDDs) equips drives with two dual stage actuators (DSA) each comprising of a voice coil motor (VCM) actuator and a piezoelectric micro actuator (MA) operating on the same pivot point.
no code implementations • 21 Jul 2021 • Dan Wang, Zhi Chen, Ionut Florescu
We apply the sparsity algorithm to provide a simple suggestion to publicly traded companies in order to improve their credit ratings.
1 code implementation • 7 Jul 2021 • Zhi Chen, Yadan Luo, Sen Wang, Ruihong Qiu, Jingjing Li, Zi Huang
Generalized Zero-Shot Learning (GZSL) is the task of leveraging semantic information (e. g., attributes) to recognize the seen and unseen samples, where unseen classes are not observable during training.
1 code implementation • 6 Jul 2021 • Ruihong Qiu, Sen Wang, Zhi Chen, Hongzhi Yin, Zi Huang
Existing visually-aware models make use of the visual features as a separate collaborative signal similarly to other features to directly predict the user's preference without considering a potential bias, which gives rise to a visually biased recommendation.
no code implementations • Findings (ACL) 2021 • Zhi Chen, Lu Chen, Hanqi Li, Ruisheng Cao, Da Ma, Mengyue Wu, Kai Yu
A dual learning approach is also proposed for the utterance rewrite model to address the data sparsity problem.
1 code implementation • ACL 2021 • Ruisheng Cao, Lu Chen, Zhi Chen, Yanbin Zhao, Su Zhu, Kai Yu
This work aims to tackle the challenging heterogeneous graph encoding problem in the text-to-SQL task.
no code implementations • 3 May 2021 • Zhi Chen, Cody Hao Yu, Trevor Morris, Jorn Tuyls, Yi-Hsiang Lai, Jared Roesch, Elliott Delaye, Vin Sharma, Yida Wang
Deep neural networks (DNNs) have been ubiquitously applied in many applications, and accelerators are emerged as an enabler to support the fast and efficient inference tasks of these applications.
1 code implementation • 24 Apr 2021 • Zhi Chen, Jiang Duan, Li Kang, Guoping Qiu
In addition to using the conditional GAN to generate class balanced supplementary training data, an innovative ensemble learning loss function ensuring each discriminator makes up for the deficiencies of the others is designed to overcome the class imbalanced problem, and an active learning algorithm is introduced to significantly reduce the cost of labeling real-world data.
no code implementations • NAACL 2021 • Zhi Chen, Lu Chen, Yanbin Zhao, Ruisheng Cao, Zihan Xu, Su Zhu, Kai Yu
Given a database schema, Text-to-SQL aims to translate a natural language question into the corresponding SQL query.
no code implementations • 20 Mar 2021 • Cynthia Rudin, Chaofan Chen, Zhi Chen, Haiyang Huang, Lesia Semenova, Chudi Zhong
Interpretability in machine learning (ML) is crucial for high stakes decisions and troubleshooting.
1 code implementation • 31 Jan 2021 • Zhi Chen, Fan Yang, Wenbing Tao
We then propose a hybrid attention block to extract feature, which integrates the Bayesian attentive context normalization (BACN) and channel-wise attention (CA).
1 code implementation • ICCV 2021 • Zhi Chen, Yadan Luo, Ruihong Qiu, Sen Wang, Zi Huang, Jingjing Li, Zheng Zhang
Generalized zero-shot learning (GZSL) aims to classify samples under the assumption that some classes are not observable during training.
no code implementations • 9 Jan 2021 • Zhi Chen, Zi Huang, Jingjing Li, Zheng Zhang
To address these issues, in this paper, we propose a novel framework that leverages dual variational autoencoders with a triplet loss to learn discriminative latent features and applies the entropy-based calibration to minimize the uncertainty in the overlapped area between the seen and unseen classes.
1 code implementation • ICCV 2021 • Zhenbo Xu, Ajin Meng, Zhenbo Shi, Wei Yang, Zhi Chen, Liusheng Huang
Current one-step multi-object tracking and segmentation (MOTS) methods lag behind recent two-step methods.
no code implementations • ICCV 2021 • Zhi Chen, Xiaoqing Ye, Wei Yang, Zhenbo Xu, Xiao Tan, Zhikang Zou, Errui Ding, Xinming Zhang, Liusheng Huang
Second, we introduce an occlusion-aware distillation (OA Distillation) module, which leverages the predicted depths from StereoNet in non-occluded regions to train our monocular depth estimation network named SingleNet.
no code implementations • 9 Dec 2020 • Jinwen Pan, Zhi Chen, Yong Wang, Roberto Horowitz
Starting from the first region, the feedforward control parameters are learned simultaneously with the low order plant model in the same region and then moves to the next region until all the regions are performed.
no code implementations • 22 Sep 2020 • Zhi Chen, Lu Chen, Xiaoyuan Liu, Kai Yu
The task-oriented spoken dialogue system (SDS) aims to assist a human user in accomplishing a specific task (e. g., hotel booking).
no code implementations • 22 Sep 2020 • Zhi Chen, Xiaoyuan Liu, Lu Chen, Kai Yu
A novel ComNet is proposed to model the structure of a hierarchical agent.
no code implementations • 22 Sep 2020 • Zhi Chen, Lu Chen, Zihan Xu, Yanbin Zhao, Su Zhu, Kai Yu
In dialogue systems, a dialogue state tracker aims to accurately find a compact representation of the current dialogue status, based on the entire dialogue history.
no code implementations • 22 Sep 2020 • Zhi Chen, Lu Chen, Yanbin Zhao, Su Zhu, Kai Yu
In task-oriented multi-turn dialogue systems, dialogue state refers to a compact representation of the user goal in the context of dialogue history.
no code implementations • 22 Sep 2020 • Zhi Chen, Lu Chen, Xiang Zhou, Kai Yu
To the best of our knowledge, this is the first effort to optimize the DST module within DRL framework for on-line task-oriented spoken dialogue systems.
no code implementations • 27 Jul 2020 • Zhi Chen, Sen Wang, Jingjing Li, Zi Huang
A voting strategy averages the probability distributions output from the classifiers and, given that some patches are more discriminative than others, a discrimination-based attention mechanism helps to weight each patch accordingly.
no code implementations • 11 Jul 2020 • Zhi Chen, Fan Yang, Wenbing Tao
We then propose a hybrid attention block to extract feature, which integrates the bayesian attentive context normalization (BACN) and channel-wise attention (CA).
no code implementations • ACL 2020 • Lu Chen, Yanbin Zhao, Boer Lyu, Lesheng Jin, Zhi Chen, Su Zhu, Kai Yu
Chinese short text matching usually employs word sequences rather than character sequences to get better performance.
no code implementations • ACL 2020 • Yanbin Zhao, Lu Chen, Zhi Chen, Ruisheng Cao, Su Zhu, Kai Yu
We also adopt graph attention networks with higher-order neighborhood information to encode the rich structure in AMR graphs.
no code implementations • 21 Jun 2020 • Zhihui Guo, Honghai Zhang, Zhi Chen, Ellen van der Plas, Laurie Gutmann, Daniel Thedens, Peggy Nopoulos, Milan Sonka
Automated segmentation of individual calf muscle compartments from 3D magnetic resonance (MR) images is essential for developing quantitative biomarkers for muscular disease progression and its prediction.
no code implementations • 4 Jun 2020 • Haichen Shen, Jared Roesch, Zhi Chen, Wei Chen, Yong Wu, Mu Li, Vin Sharma, Zachary Tatlock, Yida Wang
Modern deep neural networks increasingly make use of features such as dynamic control flow, data structures and dynamic tensor shapes.
no code implementations • 30 Apr 2020 • Yanbin Zhao, Lu Chen, Zhi Chen, Kai Yu
When modeling simple and complex sentences with autoencoders, we introduce different types of noise into the training process.
1 code implementation • 5 Feb 2020 • Zhi Chen, Yijie Bei, Cynthia Rudin
What does a neural network encode about a concept as we traverse through the layers?
no code implementations • 24 Nov 2019 • Jinyin Chen, Jian Zhang, Zhi Chen, Min Du, Qi Xuan
In this work, we present the first study of adversarial attack on dynamic network link prediction (DNLP).
no code implementations • 28 Sep 2019 • Zhi Chen, Fan Yang, Wenbing Tao
To establish the link between Fn-score and loss, we propose to guide the loss with the Fn-score directly.
no code implementations • 21 Sep 2019 • Zhi Chen, Jingjing Li, Yadan Luo, Zi Huang, Yang Yang
Thus, a multi-modal cycle-consistency loss between the synthesized semantic representations and the ground truth can be learned and leveraged to enforce the generated semantic features to approximate to the real distribution in semantic space.
no code implementations • 28 Aug 2019 • Peilan Wang, Jun Fang, Xiaojun Yuan, Zhi Chen, Huiping Duan, Hongbin Li
In this framework, we study joint active and passive precoding design for IRS-assisted mmWave systems, where multiple IRSs are deployed to assist the data transmission from a base station (BS) to a single-antenna receiver.
no code implementations • 27 May 2019 • Lu Chen, Zhi Chen, Bowen Tan, Sishan Long, Milica Gasic, Kai Yu
Experiments show that AgentGraph models significantly outperform traditional reinforcement learning approaches on most of the 18 tasks of the PyDial benchmark.
no code implementations • 25 Jul 2018 • Qian Wang, Hang Li, Zhi Chen, Dou Zhao, Shuang Ye, Jiansheng Cai
In addition, we propose to use the convolutional recurrent neural network (CRNN)---a combination of the CNN and the RNN---to learn local and contextual information in CSI for user authentication.
1 code implementation • ICML 2017 • Yizhe Zhang, Zhe Gan, Kai Fan, Zhi Chen, Ricardo Henao, Dinghan Shen, Lawrence Carin
We propose a framework for generating realistic text via adversarial training.
1 code implementation • 12 Sep 2016 • Zhou Zhou, Jun Fang, Linxiao Yang, Hongbin Li, Zhi Chen, Rick S. Blum
Different from most existing studies that are concerned with narrowband channels, we consider estimation of wideband mmWave channels with frequency selectivity, which is more appropriate for mmWave MIMO-OFDM systems.
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