Background
With the construction of transportation infrastructure, including high-speed, intercity, suburban, and urban rail transit, and the gradual deepening of concepts such as station-city integration and transit-oriented development (TOD), an…
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Noise-tolerant LiDAR approaching the standard quantum-limited precision
Experimental setup
A schematic diagram of our method is shown in Fig. 1, and Fig. 1a shows the setup of the system. A collimated pulse laser with a spectrum of 1550 nm and a pulse width of 1 ns is used as the probe light. After passing through…
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A novel SWIPT channel model and jointly age optimization in SWIPT-enabled access networks based on age of energy harvesting
System model and problem formulation
Considering the SWIPT access system model shown in Fig. 2, we extend this system to a one-to-many scenario, as depicted in Fig. 6, which includes one HAP equipped with a single antenna and \(M\) TDs, each…
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Preliminary evaluation of ChatGPT model iterations in emergency department diagnostics
Since its introduction in December 2022, numerous studies have evaluated ChatGPT’s performance across various medical domains19,20,21. As the model continue to evolve, research has expanded to assess its performance across model iterations in…
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Latent Ewald summation for machine learning of long-range interactions
Theory
For a periodic atomic system, the total potential energy is decomposed into a short-range and a long-range part, i.e. E = Esr + Elr. As is standard in most MLIPs, the short-range energy is summed over the atomic contribution of each atom i,
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Mathematician who reshaped theory of symmetry wins Abel Prize
Masaki Kashiwara’s work spans distant mathematical disciplines.Credit: Peter Bagde/Typos1/The Abel Prize
Mathematician Masaki Kashiwara has won the 2025 Abel Prize, the Norwegian Academy of Science and Letters announced today.
Kashiwara is known…
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Dynamic alterations in cortical activation during motor adaptation in table tennis using whole‑brain fNIRS
Behavioral data
In terms of target accuracy, there was no interaction between time (baseline vs. initial error at perturbation onset vs. early vs. late adaptation vs. after-effects vs. washout) and perturbation (serial vs. random, F(2.54,…
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Integrating vibration signal analysis and image embedding for enhanced bearing fault diagnosis in manufacturing
In modern manufacturing industries, the proper functionality of bearings and other rotating parts is crucial for the efficient operation of various machines. Defects in these components can significantly diminish efficiency, leading to…
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Ripples formed in low-pressure wind tunnels suggest Mars’s large windblown ripples are not impact ripples
Experimental conditions
Experiments were conducted in the Mars Surface Wind Tunnel (MARSWIT) of the Planetary Aeolian Laboratory at the NASA Ames Research Center, Mountain View, California. The MARSWIT is hosted in a pressure chamber that can be…
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Image reconstruction method based on backprojection filtration algorithm in C-arm computed tomography
For the 3D image reconstruction of the preprocessed parallel projection data, the two-step Hilbert transform method is first introduced to perform CT image reconstruction on the center plane28. Then, the two-step Hilbert transform method is…
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