Most papers are machine-translated to English; some are originally in English.
Showing 50 of 1733 papers
Structural planes (such as joints, natural fractures, and faults) that are extensively developed in unconventional reservoirs significantly control the propagation morphology of hydraulic fractures. To fully stimulate the reservoir and enhance ultimate recovery, it is necessary to accurately predict…
To investigate the influence of parallel fracture stress on hydraulic fracture propagation, this study pre-fabricated penny-shaped fractures in 30 cm cubic artificial cement specimens, with 4 FBG optical fibers containing a total of 20 strain measurement points positioned ahead of the fracture front…
Soil conditioning is a critical technology for ensuring tunnel face stability and excavation efficiency in Earth Pressure Balance (EPB) shield tunneling. Commonly used conditioning agents include water, foam, bentonite slurry, polymers, and other materials. While existing research has experimentally…
With the continuous advancement of national urbanization and the ongoing improvement of infrastructure construction, urban underground space is gradually being exploited, and large-scale infrastructure projects are increasingly intersecting and interacting, giving rise to the issue of protecting pre…
Accurately obtaining acoustic velocity parameters of soft rock formations (e.g., near-surface soils, seabed sediments) is essential for calculating their key mechanical parameters (Young's modulus and Poisson's ratio). However, existing in-situ acoustic velocity measurement techniques suffer from li…
Due to the complex geological conditions in Guangzhou, shield tunneling frequently encounters problems such as abnormal cutter wear and poor muck discharge due to slag accumulation in the chamber. Chamber cleaning is an effective solution; however, constrained by geological conditions and surface en…
Tunnel construction by mining method in water-rich sandy cobble strata faces challenges including surrounding rock instability, water and sand inrush, and settlement control. The conventional shallow buried mining method suffers from poor grouting effectiveness and low support efficiency. The sandy …
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…
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…
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…
With the development of modern economy and the progress of the era, cities continue to develop and prosper. In the process of urban construction, shield tunneling is gradually being adopted in the construction of power tunnel projects. To address the inherent limitation of insufficient launching sha…
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 …
As a specialized tunnel excavation tool, the shield machine offers advantages of high efficiency, safety, and rapid construction, and is widely employed in urban rail transit and railway tunnel projects. However, during shield construction, excavation trajectory exceeding limits (including horizonta…
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…
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…
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…
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…
