1 code implementation • 14 May 2025 • Xiwen Chen, Wenhui Zhu, Peijie Qiu, Xuanzhao Dong, Hao Wang, Haiyu Wu, Huayu Li, Aristeidis Sotiras, Yalin Wang, Abolfazl Razi
Our method integrates seamlessly with both GRPO and its variant DR.~GRPO, resulting in $\textit{DRA-GRPO}$ and $\textit{DGA-DR.~GRPO}$.
no code implementations • 13 May 2025 • Hazim Alzorgan, Abolfazl Razi
Actor-critic methods, like Twin Delayed Deep Deterministic Policy Gradient (TD3), depend on basic noise-based exploration, which can result in less than optimal policy convergence.
no code implementations • 9 May 2025 • Xiwen Chen, Wenhui Zhu, Peijie Qiu, Hao Wang, Huayu Li, Zihan Li, Yalin Wang, Aristeidis Sotiras, Abolfazl Razi
However, there is a large consensus that time series data often suffers from domain shifts between training and test sets, which dramatically degrades the classification performance.
1 code implementation • 21 Apr 2025 • Wenhui Zhu, Peijie Qiu, Xiwen Chen, Zhangsihao Yang, Aristeidis Sotiras, Abolfazl Razi, Yalin Wang
Due to the gigapixel resolution of WSI, applications of MIL in WSI typically necessitate a two-stage training scheme: first, extract features from the pre-trained backbone and then perform MIL aggregation.
no code implementations • 11 Apr 2025 • Michael Elrod, Niloufar Mehrabi, Rahul Amin, Manveen Kaur, Long Cheng, Jim Martin, Abolfazl Razi
Mission planning for a fleet of cooperative autonomous drones in applications that involve serving distributed target points, such as disaster response, environmental monitoring, and surveillance, is challenging, especially under partial observability, limited communication range, and uncertain environments.
no code implementations • 17 Mar 2025 • Sayed Pedram Haeri Boroujeni, Niloufar Mehrabi, Fatemeh Afghah, Connor Peter McGrath, Danish Bhatkar, Mithilesh Anil Biradar, Abolfazl Razi
Fire and smoke phenomena pose a significant threat to the natural environment, ecosystems, and global economy, as well as human lives and wildlife.
1 code implementation • 11 Mar 2025 • Xiwen Chen, Wenhui Zhu, Peijie Qiu, Hao Wang, Huayu Li, Haiyu Wu, Aristeidis Sotiras, Yalin Wang, Abolfazl Razi
Vision-language models (VLMs) such as CLIP demonstrate strong performance but struggle when adapted to downstream tasks.
1 code implementation • 28 Jan 2025 • Ashish Bastola, Hao Wang, Abolfazl Razi
Anomaly detection is a critical requirement for ensuring safety in autonomous driving.
no code implementations • 6 Jan 2025 • Xiwen Chen, Peijie Qiu, Wenhui Zhu, Huayu Li, Hao Wang, Aristeidis Sotiras, Yalin Wang, Abolfazl Razi
Since its introduction, the transformer has shifted the development trajectory away from traditional models (e. g., RNN, MLP) in time series forecasting, which is attributed to its ability to capture global dependencies within temporal tokens.
no code implementations • 1 Jan 2025 • Hao Wang, Xiwen Chen, Ashish Bastola, Jiayou Qin, Abolfazl Razi
The emergence of generative AI and controllable diffusion has made image-to-image synthesis increasingly practical and efficient.
no code implementations • 29 Dec 2024 • Peijie Qiu, Wenhui Zhu, Sayantan Kumar, Xiwen Chen, Xiaotong Sun, Jin Yang, Abolfazl Razi, Yalin Wang, Aristeidis Sotiras
Previous attempts at multimodal VAEs approach this mainly through the lens of experts, aggregating unimodal inference distributions with a product of experts (PoE), a mixture of experts (MoE), or a combination of both.
no code implementations • 3 Dec 2024 • Xiangyu Jiang, Xiwen Chen, Hao Wang, Abolfazl Razi
This module can efficiently fuse the node feature and geographic position information through a novel Transpose Cross-attention mechanism.
1 code implementation • 3 Dec 2024 • Hao Wang, Wenhui Zhu, Xuanzhao Dong, Yanxi Chen, Xin Li, Peijie Qiu, Xiwen Chen, Vamsi Krishna Vasa, Yujian Xiong, Oana M. Dumitrascu, Abolfazl Razi, Yalin Wang
In this work, we propose Many-MobileNet, an efficient model fusion strategy for retinal disease classification using lightweight CNN architecture.
no code implementations • 20 Nov 2024 • Ashish Bastola, Nishant Luitel, Hao Wang, Danda Pani Paudel, Roshani Poudel, Abolfazl Razi
While deep learning models are powerful tools that revolutionized many areas, they are also vulnerable to noise as they rely heavily on learning patterns and features from the exact details of the clean data.
1 code implementation • 4 Nov 2024 • Xiwen Chen, Sayed Pedram Haeri Boroujeni, Xin Shu, Huayu Li, Abolfazl Razi
The extensive experiments, utilizing real-world data across states and cities in the USA, demonstrate that integrating CP into 12 state-of-the-art GNN architectures leads to significant improvements, with gains ranging from 3% to 13% in F1 score and 1. 3% to 9% in AUC metrics.
no code implementations • 30 Sep 2024 • Niloufar Mehrabi, Sayed Pedram Haeri Boroujeni, Jenna Hofseth, Abolfazl Razi, Long Cheng, Manveen Kaur, James Martin, Rahul Amin
Unmanned Aerial Vehicles (UAVs) play an increasingly critical role in Intelligence, Surveillance, and Reconnaissance (ISR) missions such as border patrolling and criminal detection, thanks to their ability to access remote areas and transmit real-time imagery to processing servers.
1 code implementation • 17 Jul 2024 • Hao Wang, Wenhui Zhu, Jiayou Qin, Xin Li, Oana Dumitrascu, Xiwen Chen, Peijie Qiu, Abolfazl Razi
Detecting retinal image analysis, particularly the geometrical features of branching points, plays an essential role in diagnosing eye diseases.
1 code implementation • 4 Jul 2024 • Wenhui Zhu, Xiwen Chen, Peijie Qiu, Aristeidis Sotiras, Abolfazl Razi, Yalin Wang
Second, we propose two mechanisms to enforce the diversity among the global vectors to be more descriptive of the entire bag: (i) positive instance alignment and (ii) a novel, efficient, and theoretically guaranteed diversification learning paradigm.
1 code implementation • 21 Jun 2024 • Wenhui Zhu, Xiwen Chen, Peijie Qiu, Mohammad Farazi, Aristeidis Sotiras, Abolfazl Razi, Yalin Wang
Although numerous follow-up studies have also been dedicated to improving the performance of standard UNet, few have conducted in-depth analyses of the underlying interest pattern of UNet in medical image segmentation.
Ranked #17 on
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on Synapse multi-organ CT
3 code implementations • 6 May 2024 • Xiwen Chen, Peijie Qiu, Wenhui Zhu, Huayu Li, Hao Wang, Aristeidis Sotiras, Yalin Wang, Abolfazl Razi
Deep neural networks, including transformers and convolutional neural networks, have significantly improved multivariate time series classification (MTSC).
no code implementations • 5 May 2024 • Xiwen Chen, Wenhui Zhu, Peijie Qiu, Abolfazl Razi
We theoretically demonstrate the convergence of the MA framework, which has a similar complexity with reconstruction under the known forward model parameters.
1 code implementation • 25 Apr 2024 • Hao Wang, Jiayou Qin, Xiwen Chen, Ashish Bastola, John Suchanek, Zihao Gong, Abolfazl Razi
Assistive visual navigation systems for visually impaired individuals have become increasingly popular thanks to the rise of mobile computing.
no code implementations • 10 Apr 2024 • Ahmad Sarlak, Hazim Alzorgan, Sayed Pedram Haeri Boroujeni, Abolfazl Razi, Rahul Amin
To validate our approach, we used the CARLA simulator to create a dataset of annotated videos for different driving scenarios where pedestrian detection is challenging for an AV with compromised vision.
1 code implementation • 19 Mar 2024 • Hao Wang, Jiayou Qin, Ashish Bastola, Xiwen Chen, John Suchanek, Zihao Gong, Abolfazl Razi
This paper explores the potential of Large Language Models(LLMs) in zero-shot anomaly detection for safe visual navigation.
1 code implementation • 6 Mar 2024 • Hao Wang, Sayed Pedram Haeri Boroujeni, Xiwen Chen, Ashish Bastola, Huayu Li, Wenhui Zhu, Abolfazl Razi
Specifically, the fusion of Perlin noise in this work significantly improved the quality of synthesized images.
no code implementations • 29 Jan 2024 • Amirreza Talebi, Sayed Pedram Haeri Boroujeni, Abolfazl Razi
We further scrutinize the convergence rates of opinion dynamics in networks with one-way versus two-way interactions.
no code implementations • 26 Jan 2024 • Ashish Bastola, Hao Wang, Sayed Pedram Haeri Boroujeni, Julian Brinkley, Ata Jahangir Moshayedi, Abolfazl Razi
This paper provides a comprehensive and, to our knowledge, the first review of inclusive human-computer interaction (HCI) within autonomous vehicles (AVs) and human-driven cars with partial autonomy, emphasizing accessibility and user-centered design principles.
no code implementations • 11 Jan 2024 • Xiwen Chen, Hao Wang, Zhao Zhang, Zhenmin Li, Huayu Li, Tong Ye, Abolfazl Razi
Untrained Physics-based Deep Learning (DL) methods for digital holography have gained significant attention due to their benefits, such as not requiring an annotated training dataset, and providing interpretability since utilizing the governing laws of hologram formation.
no code implementations • 4 Jan 2024 • Sayed Pedram Haeri Boroujeni, Abolfazl Razi, Sahand Khoshdel, Fatemeh Afghah, Janice L. Coen, Leo ONeill, Peter Z. Fule, Adam Watts, Nick-Marios T. Kokolakis, Kyriakos G. Vamvoudakis
Wildfires have emerged as one of the most destructive natural disasters worldwide, causing catastrophic losses in both human lives and forest wildlife.
no code implementations • 30 Nov 2023 • Zhao Zhang, Xiwen Chen, William Richardson, Bruce Z. Gao, Abolfazl Razi, Tong Ye
Quantitative assessment of cardiac capillarization typically involves double immunostaining of cardiomyocytes (CMs) and capillaries in myocardial slices.
no code implementations • 24 Aug 2023 • Hazim Alzorgan, Abolfazl Razi, Ata Jahangir Moshayedi
In this paper, we investigate the operation of an aerial manipulator system, namely an Unmanned Aerial Vehicle (UAV) equipped with a controllable arm with two degrees of freedom to carry out actuation tasks on the fly.
no code implementations • 30 Jun 2023 • Uma Meleti, Abolfazl Razi
This research paper addresses the challenge of detecting obscured wildfires (when the fire flames are covered by trees, smoke, clouds, and other natural barriers) in real-time using drones equipped only with RGB cameras.
2 code implementations • 23 Jun 2023 • Hao Wang, Xiwen Chen, Natan Vital, Edward. Duffy, Abolfazl Razi
It takes only a total of 40 minutes for 5 epochs (about 7. 75 minutes per epoch) to train a network with superior performance and covering diverse conditions for its low-complexity architecture; therefore, it easily adapts to changes in the building setups, weather conditions, occupancy rate, etc.
no code implementations • 4 Jun 2023 • Xiwen Chen, Huayu Li, Rahul Amin, Abolfazl Razi
A determinant-preserved sparse representation of selected samples is used to perform sample precoding in local sources to be processed by DPP.
no code implementations • 9 Apr 2023 • Xiwen Chen, Huayu Li, Rahul Amin, Abolfazl Razi
However, the number of selected samples is restricted to the rank of the kernel matrix implied by the dimensionality of data samples.
no code implementations • 7 Nov 2022 • Hao Wang, Xiwen Chen, Abolfazl Razi, Rahul Amin
The proposed algorithm is applicable to a variety of tree-structured image matching, but our focus is on dendrites, recently-developed visual identifiers.
no code implementations • 25 May 2022 • Xiwen Chen, Hao Wang, Abolfazl Razi, Michael Kozicki, Christopher Mann
Digital holography is a 3D imaging technique by emitting a laser beam with a plane wavefront to an object and measuring the intensity of the diffracted waveform, called holograms.
no code implementations • 7 Mar 2022 • Abolfazl Razi, Xiwen Chen, Huayu Li, Hao Wang, Brendan Russo, Yan Chen, Hongbin Yu
This paper explores Deep Learning (DL) methods that are used or have the potential to be used for traffic video analysis, emphasizing driving safety for both Autonomous Vehicles (AVs) and human-operated vehicles.
no code implementations • 27 Jan 2022 • Xiwen Chen, Hao Wang, Abolfazl Razi, Brendan Russo, Jason Pacheco, John Roberts, Jeffrey Wishart, Larry Head, Alonso Granados Baca
To bridge these two perspectives, we define a new set of network-level safety metrics (NSM) to assess the overall safety profile of traffic flow by processing imagery taken by RSU cameras.
no code implementations • 23 Mar 2021 • Arnau Rovira-Sugranes, Fatemeh Afghah, Junsuo Qu, Abolfazl Razi
Current networking protocols deem inefficient in accommodating the two key challenges of Unmanned Aerial Vehicle (UAV) networks, namely the network connectivity loss and energy limitations.
2 code implementations • 28 Dec 2020 • Alireza Shamsoshoara, Fatemeh Afghah, Abolfazl Razi, Liming Zheng, Peter Z Fulé, Erik Blasch
FLAME (Fire Luminosity Airborne-based Machine learning Evaluation) offers a dataset of aerial images of fires along with methods for fire detection and segmentation which can help firefighters and researchers to develop optimal fire management strategies.
no code implementations • 23 Dec 2020 • Huayu Li, Haiyu Wu, Xiwen Chen, Hanning Zhang, Abolfazl Razi
We equip the SPA blocks on a network designed for real image denoising.
1 code implementation • 25 Apr 2020 • Huayu Li, Xiwen Chen, Haiyu Wu, Zaoyi Chi, Christopher Mann, Abolfazl Razi
Recently, end-to-end deep learning-based methods have been utilized to reconstruct the object wavefront (as a surrogate for the 3D structure of the object) directly from a single-shot in-line digital hologram.
1 code implementation • 26 Nov 2019 • Alireza Shamsoshoara, Fatemeh Afghah, Abolfazl Razi, Sajad Mousavi, Jonathan Ashdown, Kurt Turk
This paper studies the problem of spectrum shortage in an unmanned aerial vehicle (UAV) network during critical missions such as wildfire monitoring, search and rescue, and disaster monitoring.
2 code implementations • 16 Apr 2019 • Alireza Shamsoshoara, Mehrdad Khaledi, Fatemeh Afghah, Abolfazl Razi, Jonathan Ashdown, Kurt Turck
In this paper, we study the problem of spectrum scarcity in a network of unmanned aerial vehicles (UAVs) during mission-critical applications such as disaster monitoring and public safety missions, where the pre-allocated spectrum is not sufficient to offer a high data transmission rate for real-time video-streaming.
no code implementations • 31 Jul 2018 • Han Peng, Abolfazl Razi, Fatemeh Afghah, Jonathan Ashdown
In recent years, using a network of autonomous and cooperative unmanned aerial vehicles (UAVs) without command and communication from the ground station has become more imperative, in particular in search-and-rescue operations, disaster management, and other applications where human intervention is limited.
no code implementations • 5 Dec 2015 • Fatemeh Afghah, Abolfazl Razi, Kayvan Najarian
False alarm is one of the main concerns in intensive care units and can result in care disruption, sleep deprivation, and insensitivity of care-givers to alarms.