Spectral analysis of attached and separated turbulent flows over a Gaussian-shaped bump

该研究结合时间分辨实验与物理线性模型,通过谱本征正交分解揭示了高斯凸台附着流与分离流中的低频相干结构,指出分离流中的低频动力学主要由三维零频模态不稳定性及有限展向驻波驱动,从而解释了模拟与实验间的差异并为未来数值模拟的展向域尺寸和边界条件选择提供了指导。

Roman Klopsch, Lukas M. Fuchs, Georgios Rigas, Kilian Oberleithner, Jakob G. R. von SaldernMon, 09 Ma🔬 physics

First results of a Monolithic Active Pixel Sensor with Internal Signal Gain Fully Integrated in a 180 nm CMOS Technology

本文介绍了在 180 纳米 CMOS 工艺中完全集成的 CASSIA 单片有源像素传感器的初步成果,该传感器通过内部电荷倍增技术实现了信号放大,并展示了其在低电压下作为低增益雪崩二极管(LGAD)模式以及在较高电压下作为单光子雪崩二极管(SPAD)模式运行的能力,为未来高能物理实验中的高精度四维追踪应用提供了新的解决方案。

Heinz Pernegger (CERN, Experimental Physics Department, Geneva, Switzerland), Emma Kate Anderson (CERN, Experimental Physics Department, Geneva, Switzerland), Paula Bartulovic (University of Zagreb, Faculty of Electrical Engineering and Computing, Zagreb, Croatia), Ivan Berdalovic (University of Zagreb, Faculty of Electrical Engineering and Computing, Zagreb, Croatia), Marc Giroux de Foiard Brown (CERN, Experimental Physics Department, Geneva, Switzerland), Sebastian Haberl (CERN, Experimental Physics Department, Geneva, Switzerland, University of Innsbruck, Innsbruck, Austria), Matija Jugovic (University of Zagreb, Faculty of Electrical Engineering and Computing, Zagreb, Croatia), Anastasia Kotsokechagia (CERN, Experimental Physics Department, Geneva, Switzerland), Jenny Lunde (CERN, Experimental Physics Department, Geneva, Switzerland, University of Oslo, Oslo, Norway), Borna Požar (CERN, Experimental Physics Department, Geneva, Switzerland), Tomislav Suligoj (University of Zagreb, Faculty of Electrical Engineering and Computing, Zagreb, Croatia)Mon, 09 Ma🔬 physics

Large-scale real-time signal processing in physics experiments: The ALICE TPC FPGA pipeline

该论文介绍了 ALICE 实验为应对 LHC 第 3 次运行中连续读出模式下的海量数据挑战,所设计并实现的一套基于 FPGA 的大规模实时信号处理流水线,该流水线通过并行共模校正等算法在流式处理中完成数据预处理,成功将 Pb-Pb 碰撞下的原始数据率从 3 TB/s 降至约 900 GB/s。

J. Alme, T. Alt, C. Andrei, V. Anguelov, H. Appelshäuser, M. Arslandok, R. Averbeck, M. Ball, G. G. Barnaföldi, P. Becht, R. Bellwied, A. Berdnikova, B. Blidaru, L. Boldizsár, L. Bratrud, P. Braun-Munzinger, M. Bregant, C. L. Britton, H. Büsching, H. Caines, P. Chatzidaki, P. Christiansen, T. M. Cormier, L. Döpper, R. Ehlers, L. Fabbietti, F. Flor, J. J. Gaardhøje, M. G. Munhoz, C. Garabatos, P. Gasik, Á. Gera, P. Glässel, N. Grünwald, T. Gündem, T. Gunji, H. Hamagaki, J. W. Harris, P. Hauer, E. Hellbär, H. Helstrup, A. Herghelegiu, H. D. Hernandez Herrera, Y. Hou, C. Hughes, M. Ivanov, J. Jäger, Y. Ji, J. Jung, M. Jung, B. Ketzer, S. Kirsch, M. Kleiner, A. G. Knospe, M. Korwieser, M. Kowalski, L. Lautner, M. Lesch, C. Lippmann, G. Mantzaridis, R. D. Majka, A. Marin, C. Markert, S. Masciocchi, A. Matyja, M. Meres, D. L. Mihaylov, D. Miskowiec, R. H. Munzer, H. Murakami, K. Münning, A. Nassirpour, C. Nattrass, B. S. Nielsen, W. A. V. Noije, A. C. Oliveira Da Silva, A. Oskarsson, K. Oyama, L. Österman, Y. Pachmayer, G. Paic, M. Petris, M. Petrovici, M. Planinic, J. Rasson, K. F. Read, A. Rehman, R. Renfordt, A. Riedel, K. Røed, D. Röhrich, E. Rubio, A. Rusu, S. Sadhu, B. C. S. Sanches, J. Schambach, A. Schmah, C. Schmidt, A. Schmier, K. Schweda, D. Sekihata, D. Silvermyr, B. Sitar, N. Smirnov, H. K. Soltveit, C. Sonnabend, S. P. Sorensen, J. Stachel, L. Šerkšnyt\.e, G. Tambave, K. Ullaland, B. Ulukutlu, D. Varga, O. Vazquez Rueda, B. Voss, J. Wiechula, B. Windelband, J. Wilkinson, J. Witte, A. Yadav, F. Zanone, S. ZhuMon, 09 Ma🔬 physics

Predicting the onset of period-doubling bifurcations via dominant eigenvalue extracted from autocorrelation

该研究提出了一种名为“自相关主导特征值”(DE-AC)的新方法,通过利用奥恩斯坦 - 乌伦贝克过程推导解析近似来估计主导特征值,从而在预测心脏周期倍增分岔(如心律失常)的临界点时,比传统早期预警信号及现有动态特征值方法具有更高的灵敏度和特异性。

Zhiqin Ma, Chunhua Zeng, Ting Gao, Jinqiao DuanMon, 09 Ma🔬 physics

Shape-Independent Fluidization in Epithelial Cell Monolayers

该研究挑战了上皮细胞层流体化仅由细胞几何形状决定的传统观点,发现降低细胞间黏附可在不改变细胞形状的情况下显著增加组织流动性,从而揭示了黏附在热力学能量和动力学摩擦中的双重作用,并提出了修正的理论模型以完善对上皮流体性的理解。

Pradip K. Bera (Department of Mechanical Engineering, University of Wisconsin - Madison, Madison, WI, USA), Anh Q. Nguyen (Department of Physics, Northeastern University, Boston, MA, USA, Center for Theoretical Biological Physics, Northeastern University, Boston, MA, USA), Molly McCord (Department of Mechanical Engineering, University of Wisconsin - Madison, Madison, WI, USA, Biophysics Program, University of Wisconsin - Madison, Madison, WI, USA), Dapeng Bi (Department of Physics, Northeastern University, Boston, MA, USA, Center for Theoretical Biological Physics, Northeastern University, Boston, MA, USA), Jacob Notbohm (Department of Mechanical Engineering, University of Wisconsin - Madison, Madison, WI, USA, Biophysics Program, University of Wisconsin - Madison, Madison, WI, USA)Mon, 09 Ma🔬 physics

Hybrid ensemble forecasting combining physics-based and machine-learning predictions through spectral nudging

该研究首次将谱松弛技术应用于概率集合预报框架,通过将机器学习模型(AIFS-ENS)的大尺度预报信息松弛至物理模式(IFS-ENS),成功构建了混合集合预报系统,显著提升了热带和温带地区的预报技巧及热带气旋路径预测精度。

Inna Polichtchouk, Simon Lang, Sarah-Jane Lock, Michael Maier-Gerber, Peter DuebenMon, 09 Ma🔬 physics

Ultra-high frequency ultrasound imaging and quantification of microvascular flow in xenograft renal cell carcinoma in an avian chorioallantoic membrane model

该研究开发并验证了一种结合组织运动补偿与帧间减法的超高频超声成像流程,成功克服了鸡胚绒毛尿囊膜模型中的组织运动干扰,实现了对肾细胞癌异种移植瘤微血管血流及治疗反应的高效、低计算成本评估。

Sara Mar, Emmanuel Cherin, Justin Xu, David E. Goertz Hon S. Leong, Christine E. M. DemoreMon, 09 Ma🔬 physics

Real-Time Electron-Electron Scattering Dynamics in Plasmonic Nanostructures

该研究提出了一种结合实时含时密度泛函紧束缚方法与基于随机相位近似屏蔽相互作用的林德布拉德量子玻尔兹曼方程的新方法,系统揭示了银、金、铝纳米团簇中电子 - 电子散射导致的准粒子寿命、布居与相干动力学随能量及尺寸变化的规律,并阐明了量子尺寸效应及金 5d 带对弛豫过程的显著影响。

Yanze Wu, George C. SchatzMon, 09 Ma🔬 physics

Effects of 3D printed capsule material on activation thin foil irradiation and counting for fusion neutron yield measurements

该研究结合 FISPACT 模拟与氘氚中子发生器实验,评估了不同活化箔及 3D 打印胶囊材料对聚变中子产额测量的影响,证实了铝和铜箔的适用性、3D 打印胶囊在不确定度范围内的可行性,以及镧基探测器作为高纯锗谱仪替代方案的潜力。

D. Lobelo, E. Panontin, X. Wang, P. Raj, I. Holmes, R. A. TinguelyMon, 09 Ma🔬 physics