Automatically translated preprints from the Chinese arXiv (ChinaXiv).
Showing 50 of 1495 papers
To improve the accuracy of damage identification, the concept of reciprocal variables is introduced, and a truss damage identification method combining reciprocal variables with the generalized flexibility matrix is proposed. This method requires only low-order modal parameters. For cases of incompl…
The free vibration characteristics of functionally graded thin elliptical cylindrical shells are investigated based on the absolute nodal coordinate formulation (ANCF). Third-order Bézier curve fitting technique is employed to calculate the initial circumferential tangent vector and circumferential …
To achieve industrialized production and rapid construction of reinforced concrete wall panels, a fully bolted connection technology utilizing boot-shaped embedded parts is proposed. Horizontal pushover tests were conducted to investigate the failure modes, stress distribution, and mechanical behavi…
Automatic identification of radioactive isotopes through energy spectrum analysis is vital for remote, unmanned monitoring of radioactive contamination and rapid early warning. In recent years, deep learning methods have advanced significantly, outperforming traditional approaches in recognition acc…
To further investigate the mechanical characteristics of overconsolidated unsaturated cohesive soil and to verify the proposed three-shear subloading surface model for overconsolidated unsaturated cohesive soil through true triaxial numerical tests, Jiangxi laterite was selected as the research obje…
Based on the simplification of the cylindrical axisymmetric problem and the favorable properties of modified Bessel functions, a displacement harmonic function containing undetermined functions was constructed. Applying the constructed displacement harmonic function, stress expressions containing un…
To assess the structural safety of the graphite core in gas-cooled microreactors and obtain the stress state of core graphite components under seismic excitation, this study compared acceleration and velocity curves from small-scale graphite block collision experiments with simulation results. It wa…
To investigate the influencing factors and influence patterns of cooled exhaust emission with small ejection ratio during engine operation in a climate laboratory, a typical low bypass ratio engine was selected as the research object. Using numerical simulation methods and considering engine exhaust…
The Udwadia-Kalaba equations provide an explicit solution method for complex constrained multibody systems. This method can decouple the generalized accelerations and generalized constraint forces in the system without introducing auxiliary variables, thereby obtaining explicit expressions for both.…
TC17 titanium alloy is a typical engine blisk material, and its very-high-cycle fatigue performance is directly related to the long-life, high-reliability design of engines. The very-high-cycle fatigue performance of TC17 was investigated using four test methods: conventional tension-compression, co…
The hoop truss antenna, as a typical deployable satellite antenna structure, possesses broad application prospects in high-power spaceborne antennas due to its advantages of large aperture, light weight, high packaging efficiency, good stiffness, and the characteristic that its total mass does not i…
Cosmic-ray muon sources exhibit distinct scattering angle distributions when interacting with materials of different atomic numbers (Z values), facilitating the identification of various Z-class materials, particularly those radioactive high-Z nuclear elements. Most of the traditional identification…
Cancer is the second leading cause of mortality globally. As a critical technological approach in oncology treatment, radiation therapy includes conventional dose rate radiation therapy, high dose rate radiotherapy and ultra-high dose rate radiation therapy (FLASH-RT). With the significant escalatio…
We studied the energy partition between two well-separated fission fragments associated with the partition of nucleons owing to quantum entanglement. This is different from most fission models that invoke an explicit statistical partition of excitation energies. The dynamical fission evolution is de…
[Purpose/Significance] In the new era, information literacy or data literacy will become a core competency element for personnel across all sectors of society. By systematically reviewing the phased developmental trajectory of information literacy research themes in China, this study aims to reveal …
[Objective/Significance] This study analyzes the characteristics and performance differences of collocation strength calculation formulas in the automatic extraction of Chinese window collocations and dependency collocations, aiming to provide reference for Chinese collocation research and internati…
[Purpose/Significance] Investigating the influencing factors of quantified self holds significant practical implications for enhancing national health literacy, elevating individual health awareness, and promoting health behaviors. [Method/Process] This paper conducts a mixed-methods study combining…
[Purpose/Significance] As the primary repositories of local historical documents, public libraries' active participation in the compilation and publication of local literature series is of great significance for protecting and promoting local characteristic culture and facilitating local socio-econo…
[Purpose/Significance] Developing an ontological organization model for digital resources of major emergency events oriented towards thematic databases facilitates the preservation and transmission of disaster historical memory, and enables the realization of the historical value and practical utili…
[Purpose/Significance] Digital technology constitutes the core driving force and a vital component of new quality productive forces. Analyzing the evolutionary trends of research themes in China's digital technology domain aims to enhance the interdisciplinary convergence between digital technology …
[Purpose/Significance] In the current digital wave sweeping across the globe, artificial intelligence, as the most disruptive and transformative force in the technological domain, is permeating human society in an unprecedentedly rapid and comprehensive manner. Philosophy and social sciences are als…
[Objective/Significance] With the advent of the artificial intelligence era, algorithms have risen to prominence, propelling rapid economic and social development. Concurrently, algorithm-induced social issues are increasingly emerging, among which platform algorithm abuse represents a significant c…
［Purpose/Significance］This study explores the key constituent elements of trusted data space and its implementation pathway, focusing on analyzing the role and impact of large model technology in data security governance and trust mechanism framework construction. ［Method/Process］Employing a methodo…
The presence of hydrogen will affect the formation of irradiation defects in reactor structural materials, which in turn will influence the degradation of their mechanical properties. A deeper understanding of the mechanisms behind irradiation effects in structural materials in the presence of hydro…
Background Acute ST-segment elevation myocardial infarction (STEMI) is associated with high mortality and disability rates. Percutaneous coronary intervention (PCI) is an important revascularization method that can improve prognosis. However, some patients experience recurrent angina after PCI, affe…
To elucidate the complex pathways and underlying mechanisms of intimate partner violence (IPV) disengagement, this study systematically reviews the multi-level influencing factors of IPV disengagement, and proposes the Staged-Continuum DynamicInteraction Model (SCDIM) for IPV disengagement by integr…
To meet the rapid assessment requirements for cracks (service-induced cracks) detected during in-service inspection of Reactor Pressure Vessels (RPV), it is necessary to conduct research on the methodology for establishing acceptance criteria for service-induced cracks and to develop acceptance crit…
Presenting multiple face images of the same person can significantly improve participants' recognition performance for face identity. However, the cognitive mechanisms underlying the improvement in face recognition performance through multiple images remain unclear. This study includes two experimen…
Being moved is an involuntary, immediate emotional state triggered by external stimuli. Once elicited, being moved exerts social bonding effects, not only strengthening the bond between the individual and the direct trigger, but also producing broader spillover effects that extend the individual's p…
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…
Benchmark experiments are indispensable for the development of neutron nuclear data evaluation libraries. Given the lack of domestic benchmarking of nuclear data in the fission energy region, this study developed a neutron leakage spectrum measurement system using a spherical sample based on the 252…
This paper addresses the operational instability issues of the denitrification fluidized bed heating system. Through improvements to the external heating method, upgrades to the internal heating rod material, and optimization of the control system, system stability has been significantly enhanced. S…
As a key instrument for measuring core neutron flux, the signal current of self-powered neutron detectors (SPND) changes due to continuous material burnup. Accurate consideration of the long-term evolution of SPND signals is crucial for reliable power monitoring and safe reactor operation. This stud…
We analyze DESI DR2 data with a model-independent method and find that: (a) the expansion of the universe may speed up with a confidence level more than 2.3 $\sigma$ at redshift $z_{51}\in (0.51, 0.955)$; (b) the expansion of the universe may speed down with a confidence level greater than 1.7 $\sig…
Negative Poisson's ratio metamaterials, also known as "auxetic" metamaterials, represent a class of mechanical metamaterials with unique mechanical properties: under vertical compressive (tensile) loading, the structure undergoes lateral contraction (expansion). This characteristic is closely relate…
We present the preparation and measurement of the radioactive isotope $\rm ^{37}Ar$, which was produced using thermal neutrons from a reactor, as a calibration source for liquid xenon time projection chambers. $\rm ^{37}Ar$ is a low-energy calibration source with a half-life of 35.01 days, making it…
Hyperelastic materials exhibit excellent mechanical properties and have been widely applied in engineering. To accurately calculate the large deformation response of hyperelastic materials, this study reviews eight commonly used macroscopic hyperelastic constitutive models and presents fitting metho…
Heat pipe cooled reactors have emerged as a research focus in the nuclear energy domain due to their high safety and efficient heat transfer performance. The wick, as their core component, has surface wetting characteristics that directly influence capillary force and heat transfer efficiency. Based…
Unlike the structural characteristics of conventional single-focus X-ray tubes, the radiation protection and shielding design of distributed multi-focus X-ray tubes requires targeted research. This paper employs Monte Carlo simulation methods to model and investigate the radiation field and shieldin…
Pebble bed high-temperature gas-cooled reactors (HTGRs) are on-line refueling cores with spherical fuel elements. In an equilibrium core, each fuel pebble must undergo 15 cycles of being loaded into the core from the top and discharged from the bottom under gravity, resulting in a complex burnup his…
From a multi-scale perspective encompassing national, natural geographical division, and provincial levels, this study examines 899 ski resorts in China and comprehensively employs spatial analysis techniques such as Voronoi coefficient of variation, kernel density, and geographical detector model t…
Accurately identifying the spatial characteristics of ecosystem service supply and demand and delineating ecological management zones are of significant importance for guiding regional ecosystem management and restoration. Focusing on the overall ecosystem of Northwest China and from the perspective…
High-precision research on the spatial distribution of agricultural population is fundamental to constructing a modern agricultural industrial system and holds significant decision-making value for fostering new-quality agricultural productive forces. Based on county-level data from the Seventh Nati…
As an underdeveloped component of the education system, precise quantification of kindergarten enrollment accessibility helps evaluate the spatial allocation efficiency of preschool education resources. Taking the main urban area of Lanzhou City as a case study, and combining data such as kindergart…
Research on charming territorial space within the context of territorial spatial planning represents a vital approach for constructing and perfecting territorial spatial patterns in the new era, and exploring its intrinsic mechanisms and spatial identification pathways holds significant importance f…
As an important region for ecological protection and economic development in China, investigating the characteristics of vegetation change under different dry-wet partitions in the Yellow River Basin is crucial for adjusting ecological restoration strategies to cope with potential threats posed by e…
The Normalized Difference Vegetation Index (NDVI) is an important indicator for assessing ecological environmental stability. The Northwest Arid Eco-geographical Region of China has a fragile ecological environment, and analyzing the spatiotemporal variation of its NDVI and its driving forces is of …
Studies on the spatiotemporal variation characteristics of vegetation cover in Hulunbuir can provide insights for formulating precise vegetation restoration and ecological environmental protection policies, which is beneficial to the ecological civilization construction in Hulunbuir. Using methods s…
The history of libraries is not only a history of socio-cultural development, but also a history of library scholars inheriting civilization and serving society. The construction of digital memory of library scholars, at the public level, helps enhance the general public's understanding of the devel…
This study statistically analyzes government procurement data for books in Shaanxi provincial public universities from 2019 to 2023, examining the current status of government procurement of books in these institutions. The findings indicate that government procurement has become the primary method …
