Automatically translated preprints from the Chinese arXiv (ChinaXiv).
Showing 50 of 1495 papers
As a critical stage in shield method construction, large-diameter shield arrival technology involves complex processes with substantial risks. To mitigate potential hazards such as water seepage, sudden inrush, cracking, and settlement during shield reception in shallow overburden and highly permeab…
In modern urban subway construction, the construction of connecting passages between subway stations and their entrances/exits constitutes an engineering task characterized by high technical complexity and substantial risk factors. Particularly in zones with shallow overburden depth, the application…
During the construction of deep foundation pits adjacent to existing subway structures, the complexity of engineering geological and boundary conditions renders theoretical analysis inadequate for accurately calculating deformation and internal force variations in adjacent subway structures, making …
With the widespread application of shield tunneling technology in complex hard rock strata, the impact of cutter housing assembly configurations in atmospheric pressure cutterhead shield machines on construction efficiency and safety has become increasingly prominent. This paper investigates the Gua…
The topography of submarine bedrock areas is rugged and uneven, characterized by alternating peaks and valleys with substantial dispersion in water depth data. Typically composed of moderately to slightly weathered granite, these formations exhibit high rock strength and complex terrain, necessitati…
To investigate the construction technology of tri-mode tunnel boring machines (TBMs) operating in TBM mode within full-face rock strata, this study takes the shield tunnel section project between Luogang Station and Shuixi Station on Guangzhou Metro Line 7 Phase II as the research background, and su…
Rock aggregates have been extensively exploited in construction, and the associated engineering features play a critical role in their application. The main aim of this research is to assess the impact of petrographic characteristics on the engineering properties of carbonate rocks. A total of 45 ca…
Shield tunneling is increasingly applied in underground engineering construction due to its high safety and excellent construction efficiency. During long-distance tunneling in mixed ground conditions, extra-large diameter slurry shields are prone to muck accumulation and poor discharge at the front…
Using Kolmogorov-Arnold Networks (KANs), we construct a holographic model informed by lattice QCD data. This neural network approach enables the derivation of an analytical solution for the deformation factor $w(r)$ and the determination of a constant $g$ related to the string tension. Within the KA…
Gas-cooled micro-reactors are constrained by their compact arrangement and high-temperature operating environment, which limits core monitoring to only a small number of ex-core detectors. A nuclear measurement system layout scheme coupling neutron sources with ex-core detectors for micro-reactors i…
The ultrahigh-energy-resolution soft X-ray beamline, "Dreamline," at the Shanghai Synchrotron Radiation Facility (SSRF), has been successfully constructed and is now fully operational for conducting angle-resolved photoemission spectroscopy (ARPES) and photoelectron emission microscopy (PEEM) experi…
High flux reactors (HFRs) are a special type of research reactor aimed at providing a high neutron flux. Compared with power reactors and other research reactors, HFRs have unique technical features in terms of reactor core design, irradiation capability, and operating characteristics. They can be a…
Background: Drug use disorder has become a global public health challenge that threatens people's lives and health, increases disease burden, and constrains economic development and social progress. The disease burden caused by different types of drug use varies, and identifying priorities for preve…
Background In accordance with the medical-preventive integration work deployment, and building upon the implementation of basic public health services, Longhua District of Shenzhen launched a pilot program of "digitalization + health management" generalist-specialist collaborative services across th…
Background Nervous system diseases severely impair patients' quality of life, with complex etiologies involving multiple factors such as genetics, infection, and immunity. In recent years, research on the involvement of gut microbiota in the pathogenesis and progression of nervous system diseases vi…
High multipole electromagnetic transitions are rare in nature. The highest multipole transition observed in atomic nuclei is the electric hexacontatetrapole E6 transition from the T1/2 = 2.54(2)-min Jπ = 19/2− isomer to the 7/2− ground state in 53Fe with an angular momentum change of six units. In t…
The fusion dynamics of \ce{^6Li} and \ce{^7Li} projectiles incident on \ce{^{13}C} and \ce{^{12}C} targets, respectively, near the Coulomb barrier, were investigated theoretically using the antisymmetrized molecular dynamics (AMD) model. Within the AMD framework, the ground state configurations of \…
Nuclear masses play a crucial role in both nuclear physics and astrophysics, driving sustained efforts toward their precise experimental determination and reliable theoretical prediction. In this work, we compile the newly measured masses for 296 nuclides from 40 references published between 2021 an…
Understanding the long-term behavior of spent nuclear fuel (SNF) is crucial for safe radioactive waste management. This study evaluates how burn-up, sintering temperature, and leaching temperature impact the leaching and microstructural stability of SIMulated FUEL (SIMFUEL) pellets designed to simul…
Unmanned aerial vehicle (UAV)-borne gamma-ray spectrum surveys play a crucial role in geological mapping, radioactive mineral exploration, and environmental monitoring. However, raw data are often compromised by flight and instrument background noise, as well as detector resolution limitations, whic…
To study the uncertainty quantification of resonant states in open quantum systems, we developed a Bayesianframework by integrating a reduced basis method (RBM) emulator with the Gamow coupled-channel (GCC)approach. The RBM, constructed via eigenvector continuation and trained on both bound and reso…
A methodology based on low energy photon spectrometry with a silicon drift detector (SDD) is developed for the determination of 235U/238U atom ratio in uranium samples. The SDD is well suited for measuring low energy photons emitted from thin uranium sample source with low self-absorption. The main …
This work presents the preparation and measurement results of the radioactive isotope ³⁷Ar, which is produced using reactor thermal neutrons and serves as a low-energy calibration source for liquid xenon time projection chambers. With a half-life of 35.01 days and low energy, ³⁷Ar is an ideal choice…
To ensure the safe transportation of radioactive materials, numerous countries have established specific stan dards. For the transfer of fissile materials, it is imperative that the material within the packaging remains in a subcritical state during routine, normal, and accidental transport conditio…
A silicon microstrip detector (SSD) has been developed to have state of the art spatial resolution and a large sensitive area under stringent power constraints. The design incorporates three floating strips with their bias resistors inserted between two aluminum readout strips. Beam test measurement…
The neutron diffusion equation plays a pivotal role in the analysis of nuclear reactors. Nevertheless, employ#2;ing the Physics-Informed Neural Network (PINN) method for its solution entails certain limitations. TraditionalPINN approaches often utilize fully connected network (FCN) architecture, whi…
Physics-informed neural networks (PINNs) play a vital role in machine learning and demonstrate significant advantages in addressing complex physical problems. The PINN method enables rapid prediction of 220Rn progeny concentration and holds significant importance for the regulation and measurement o…
In this study, the dosimetric characteristics (thickness applicability, preheating time, temperature and hu midity dependence, in-batch uniformity, readout reproducibility, dose linearity, self-decay, and electron energy response) of engineered polycarbonate films irradiated with an electron beam (0…
Many adsorbents have been developed for uranium recovery to ensure global energy and environmental security. However, most reported adsorbents involve complex preparation process and rely heavily on petrochemical feedstocks, which undoubtedly increases carbon emissions from production in the nuclear…
Computational phantoms play an essential role in radiation dosimetry and health physics. Although mesh-type phantoms offer a high resolution and adjustability, their use in dose calculations is limited by their slow computational speed. Progress in heterogeneous computing has allowed for substantial…
With the significant development of high-intensity hadron (proton and heavy ion) accelerator facilities, the space charge effect has become a major limiting factor for increasing beam intensity because it can drive particle resonance, forming beam halos and causing beam quality degradation or even b…
Lunar Laser Ranging has extremely high requirements for the pointing accuracy of the telescopes used. To improve its pointing accuracy and solve the problem of insufficiently accurate telescope pointing correction achieved by tracking stars in the all-sky region, we propose a processing scheme to se…
Previous studies aiming to accelerate data processing have focused on enhancement algorithms, using the graphics processing unit (GPU) to speed up programs, and thread-level parallelism. These methods overlook maximizing the utilization of existing central processing unit (CPU) resources and reducin…
Radio environment plays an important role in radio astronomy observations. Further analysis is needed on the time and intensity distributions of interference signals for long-term radio environment monitoring. Sample variance is an important estimate of the interference signal decision threshold. He…
The Ground-based Wide-Angle Cameras array necessitates the integration of more than 100 hardware devices, 100 servers, and 2 500 software modules that must be synchronized within a 3-second imaging cycle. However, the complexity of real-time, high-concurrency processing of large datasets has histori…
The performance of the deconvolution algorithm plays a crucial role in data processing of radio interferometers. The multi-scale multi-frequency synthesis (MSMFS) CLEAN is a widely used deconvolution algorithm for radio interferometric imaging, which combines the advantages of both wide-band synthes…
Superconducting kinetic inductance detectors (KIDs) are considered to be a highly promising technique for the large-scale imaging of millimeter and submillimeter waves in astronomy. As the pixel density and the array size increase, the electromagnetic crosstalk inevitably becomes a problem that prev…
In this paper, a novel method for investigating the particle-crushing behavior of breeding particles in a fusion blanket is proposed. The fractal theory and Weibull distribution are combined to establish a theoretical model, and its validity was verified using a simple impact test. A crushable discr…
Maximizing beam energy deposition requires capturing the entire ion population within a single short-duration bunch to achieve peak power. Using the typical beam 238 U 35+ in the Booster Ring (BRing) at the High Intensity Heavy-Ion Accelerator Facility (HIAF) as an example, we systematically analyze…
For controlled nuclear fusion, it is of significance to develop a comprehensive simulation environment for Inertial Confinement Fusion(ICF) . This environment must accurately calculate the energy loss of charged particles in high-temperature, high-density plasma, and simulate the physical parameters…
The muonium to antimuonium conversion research would be enhanced by an intense pulsed muon source. However, the high intensity muon source induces high pile-up rate in the detector system and reduces the total efficiency. Here we propose a Low Gain Avalanche Detector (LGAD)-based system to search fo…
Originating in the early 20th century, the revolutions of relativity and quantum theory failed to deliver the anticipated ultimate physical theory; instead, physics in the 21st century confronts even greater perplexities and profound crises. The persistent visibility yet elusiveness of grand unified…
Reactor burnup calculations are crucial to the safe operation and fuel management of nuclear power plants. In recent years, the Chebyshev Rational Approximation Method (CRAM) has emerged as one of the primary methods for solving burnup equation systems. When employing CRAM, complex matrix computatio…
We present a new development in the multireference covariant density functional theory (MR-CDFT) for the low-lying states of odd-mass nuclei by mixing the configurations not only with different intrinsic quadrupole shapes, but also with different $K$ quantum numbers. All the configurations are proje…
In the future, advanced reactors will face harsh core environments. Utilizing off-situ detection signals to invert the neutron distribution within the core represents a crucial means for ensuring safe core operation. The latest data-driven off-situ inversion algorithms have not fully considered the …
To calculate the detection efficiency curve and coincidence correction factors for a well-type HPGe detector, the detection efficiency of the HPGe was calibrated using commonly employed single-energy γ radionuclide standard sources, while cascade coincidence correction factors for common radionuclid…
To enhance the safety and reliability of space nuclear power sources, a transient safety analysis code NUSOL-LMR-Li was developed for the lithium-cooled fast reactor Stirling power conversion system, focusing on analyzing its performance and adaptive characteristics under accident conditions. Based …
The 2019 edition of the International Reactor Physics Evaluation Project (IRPhEP) Handbook incorporated the Molten Salt Reactor Experiment (MSRE) benchmark, providing keff (effective multiplication factor) values derived from first criticality experiments and control rod worth calculations for multi…
In high-energy physics~(HEP) experiments, visualization software plays a pivotal role in detector design, offline software development, and event data analysis. The visualization tools integrate detailed detector geometry with complex event data models, providing the researchers with invaluable insi…
Gamma-ray imaging plays a crucial role in source-term monitoring and consequence management of nuclear power plants. These applications typically involve mapping of complex spatial distributions consisting of various radioactive isotopes, and coverage of large areas through free-moving measurements.…
