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Recently, perception task based on Bird's-Eye View (BEV) representation has drawn more and more attention, and BEV representation is promising as the foundation for next-generation Autonomous Vehicle (AV) perception. However, most existing…

计算机视觉与模式识别 · 计算机科学 2024-07-10 Yangguang Li , Bin Huang , Zeren Chen , Yufeng Cui , Feng Liang , Mingzhu Shen , Fenggang Liu , Enze Xie , Lu Sheng , Wanli Ouyang , Jing Shao

To improve the quality of cancer treatment with protons, a translation of X-ray Computed Tomography (CT) images into a map of the proton stopping powers needs to be more accurate. Proton stopping powers determined from CT images have…

Background and purpose: In-beam Positron Emission Tomography (PET) is one of the modalities that can be used for in-vivo non-invasive treatment monitoring in proton therapy. PET distributions obtained during various treatment sessions can…

We report measurements of the beam spin asymmetry in Deeply Virtual Compton Scattering (DVCS) at an electron beam energy of 4.8 GeV using the CLAS detector at the Thomas Jefferson National Accelerator Facility. The DVCS beam spin asymmetry…

高能物理 - 实验 · 物理学 2019-08-13 G. Gavalian

In the context of large-angle cone-beam tomography (CBCT), we present a practical iterative reconstruction (IR) scheme designed for rapid convergence as required for large datasets. The robustness of the reconstruction is provided by the…

Extreme Ultraviolet (EUV) lithography is the state-of-the-art process in semiconductor fabrication, yet its spatial resolution is fundamentally limited by the ``blur'' originating from absorption of photons at 92 eV, which induce physical…

Scaling the input image resolution is essential for enhancing the performance of Vision Language Models (VLMs), particularly in text-rich image understanding tasks. However, popular visual encoders such as ViTs become inefficient at high…

Purpose: To develop a Monte Carlo (MC) therapeutic dose calculation toolkit of a recently released ring gantry linac in Geant4 (Version 10.7) for secondary dose validation of radiotherapy plan. Methods: For the Halcyon (Varian Medical…

医学物理 · 物理学 2022-10-04 Ruirui Liu , Zhen Ji , Xiandong Zhao , Tianyu Zhao , Abhishek Sethi , Daren Sawkey , Bin Cai

To assess the viability of a shallow-depth neutrino detector, a Cosmic Muon Veto Detector (CMVD) is being constructed on top of the stack of Resistive Plate Chamber (RPC) detectors at TIFR, Mumbai. The CMVD employs extruded plastic…

We report on the measurement of the beam spin asymmetry in the deeply virtual Compton scattering off $^4$He using the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab using a 6 GeV longitudinally polarized electron beam incident…

核实验 · 物理学 2021-08-18 R. Dupré , M. Hattawy , N. A. Baltzell , S. Bültmann , R. De Vita , A. El Alaoui , L. El Fassi , H. Egiyan , F. X. Girod , M. Guidal , K. Hafidi , D. Jenkins , S. Liuti , Y. Perrin , S. Stepanyan , B. Torayev , E. Voutier , M. J. Amaryan , W. R. Armstrong , H. Atac , C. Ayerbe Gayoso , L. Barion , M. Battaglieri , I. Bedlinskiy , F. Benmokhtar , A. Bianconi , A. S. Biselli , M. Bondi , F. Bossù , S. Boiarinov , W. J. Briscoe , D. Bulumulla , V. Burkert , D. S. Carman , J. C. Carvajal , M. Caudron , A. Celentano , P. Chatagnon , V. Chesnokov , T. Chetry , G. Ciullo , B. A. Clary , P. L. Cole , M. Contalbrigo , G. Costantini , V. Crede , A. D'Angelo , N. Dashyan , M. Defurne , A. Deur , S. Diehl , C. Djalali , M. Ehrhart , L. Elouadrhiri , P. Eugenio , S. Fegan , A. Filippi , T. A. Forest , Y. Ghandilyan , G. P. Gilfoyle , R. W. Gothe , K. A. Griffioen , H. Hakobyan , T. B. Hayward , K. Hicks , A. Hobart , M. Holtrop , Y. Ilieva , D. G. Ireland , E. L. Isupov , H. S. Jo , K. Joo , S. Joosten , D. Keller , G. Khachatryan , A. Khanal , M. Khandaker , A. Kim , W. Kim , A. Kripko , V. Kubarovsky , S. E. Kuhn , L. Lanza , K. Livingston , M. L. Kabir , M. Leali , P. Lenisa , I. J. D. MacGregor , D. Marchand , N. Markov , V. Mascagna , M. Mayer , B. McKinnon , M. Mirazita , V. I. Mokeev , K. Neupane , S. Niccolai , T. R. O'Connell , M. Osipenko , M. Paolone , L. L. Pappalardo , R. Paremuzyan , E. Pasyuk , D. Payette , W. Phelps , N. Pivnyuk , O. Pogorelko , J. Poudel , Y. Prok , M. Ripani , J. Ritman , A. Rizzo , G. Rosner , P. Rossi , J. Rowley , F. Sabatié , C. Salgado , A. Schmidt , R. Schumacher , V. Sergeyeva , Y. Sharabian , U. Shrestha , D. Sokhan , O. Soto , N. Sparveris , I. I. Strakovsky , S. Strauch , N. Tyler , M. Ungaro , L. Venturelli , H. Voskanyan , A. Vossen , D. Watts , K. Wei , X. Wei , L. B. Weinstein , R. Wishart , M. H. Wood , B. Yale , N. Zachariou , J. Zhang

Can a lightweight Vision Transformer (ViT) match or exceed the performance of Convolutional Neural Networks (CNNs) like ResNet on small datasets with small image resolutions? This report demonstrates that a pure ViT can indeed achieve…

计算机视觉与模式识别 · 计算机科学 2024-02-07 Jen Hong Tan

Experiments aiming to directly detect dark matter through particle recoils can achieve energy thresholds of $\mathcal{O}(1\,\mathrm{eV})$. In this regime, ionization signals from small-angle Compton scatters of environmental $\gamma$-rays…

We describe a camera beam simulator for the LSST which is capable of illuminating a 60mm field at f/1.2 with realistic astronomical scenes, enabling studies of CCD astrometric and photometric performance. The goal is to fully simulate LSST…

天体物理仪器与方法 · 物理学 2014-11-21 J. A. Tyson , J. Sasian , K. Gilmore , A. Bradshaw , C. Claver , M. Klint , G. Muller , G. Poczulp , E. Resseguie

Clinical imaging trials play a crucial role in advancing medical innovation but are often costly, inefficient, and ethically constrained. Virtual Imaging Trials (VITs) present a solution by simulating clinical trial components in a…

Accurate targeting is critical for the effectiveness of transcranial focused ultrasound (tFUS) neuromodulation. While CT provides accurate skull acoustic properties, its ionizing radiation and poor soft tissue contrast limit clinical…

医学物理 · 物理学 2025-07-14 Hengyu Gao , Shaodong Ding , Ziyang Liu , Jiefu Zhang , Bolun Li , Zhiwu An , Li Wang , Jing Jing , Tao Liu , Yubo Fan , Zhongtao Hu

The purpose of this study was to investigate the feasibility of extracting proton beams with two distinct energies within a single synchrotron cycle. The energy difference between the beams should be sufficient to use one beam as a range…

Cone beam computed tomography (CBCT)-guided puncture has become an established approach for diagnosing and treating early- to mid-stage thoracic tumours, yet the associated radiation exposure substantially elevates the risk of secondary…

Conventional computed tomography (CT) lacks the ability to capture dynamic, weight-bearing joint motion. Functional evaluation, particularly after surgical intervention, requires four-dimensional (4D) imaging, but current methods are…

计算机视觉与模式识别 · 计算机科学 2025-08-25 Hao Tang , Rongxi Yi , Lei Li , Kaiyi Cao , Jiapeng Zhao , Yihan Xiao , Minghai Shi , Peng Yuan , Yan Xi , Hui Tang , Wei Li , Zhan Wu , Yixin Zhou

A prototype plastic scintillating fibre based beam profile monitor was tested at the Heidelberg Ion Therapy Centre / \textit{Heidelberg Ionenstrahl Therapiezentrum} (HIT) in 2016 to determine its beam property reconstruction performance and…

仪器与探测器 · 物理学 2018-06-27 B. D. Leverington , M. Dziewiecki , L. Renner , R. Runze

Benchmarking and characterising quantum states and logic gates is essential in the development of devices for quantum computing. We introduce a Bayesian approach to self-consistent process tomography, called fast Bayesian tomography (FBT),…