Automatically translated preprints from the Chinese arXiv (ChinaXiv).
Showing 50 of 1495 papers
For over six decades, the violation of parity symmetry has been treated as a foundational fact of modern physics. This article re-examines that conclusion and argues that parity was never violated—because it was never physically there to begin with. Through a structural analysis of the 1957 Wu exper…
Ideological and political education is instrumental in shaping students' humanistic, political, and professional competencies, while also serving as a critical mechanism for cultivating innovative spirit and practical abilities. Principles of Geographic Information Systems constitutes a core curricu…
Background The incidence of diabetes is increasing year by year. China has incorporated the management of type 2 diabetes as an important disease category into community basic health services; however, gaps remain in standardized grassroots diabetes management, particularly regarding quality and cap…
Planetary surfaces, shaped by billions of years of geologic evolution, display numerous impact craters whose distribution of size, density, and spatial arrangement reveals the celestial body's history. Identifying these craters is essential for planetary science and is currently mainly achieved with…
This paper presents a comprehensive analysis of the photometric system of the University of Chinese Academy of Sciences 70 cm Telescope located at the Yan-qi Lake campus of the University of Chinese Academy of Sciences. We evaluated the linearity, bias stability, and dark current of the camera. Util…
To address the installation challenges of a 2-m ring Gregorian telescope system and similar optical systems with a small width-to-radius ratio, we propose a detection method combining local interferometry with a comparison model. This method enhances the precision of system calibration by establishi…
Abstract: This paper takes ancient Chinese book collection and reading culture as its research object, innovatively integrating perspectives of material culture, spatial narrative, and cutting-edge technology to explore the underlying cultural thoughts, social impacts, and contemporary values. The a…
[Purpose/Significance] This study explores the adaptability and evolution path of Agent technology in scientific and technological intelligence work, addressing the increasingly growing demands for intelligence and cognition in intelligence operations. [Method/Process] Based on the functional evolut…
The Solar Close Observations and Proximity Experiments (SCOPE) mission will send a spacecraft into the solar atmosphere at a low altitude of just 5 R☉ from the solar center. It aims to elucidate the mechanisms behind solar eruptions and coronal heating, and to directly measure the coronal magnetic f…
Exploiting remote sensing data is a promising approach to estimate surface solar irradiance (SSI). In this study, we propose a method to estimate global SSI using a lookup table and Landsat data. Despite the low temporal resolution of the data used, the developed method produces SSI maps with adequa…
Background With population aging and an increasing proportion of chronic disease patients, public demand for primary healthcare resources is becoming increasingly diversified and complex. Demand for primary healthcare resources varies across different regions and populations, and some areas face sho…
We present analog clocks fitted to the Mars solar day. These clocks use the standard Earth-based second of the International System of Units (SI) as their operational unit of time, unlike current practice for Mars timekeeping. We discuss the importance of preserving the SI second. On this basis, we …
Background: As China's aging process continues to advance, health shock issues among the middle-aged and elderly population have increasingly become a significant social problem. Objective: To comprehensively understand the health shock situation among middle-aged and elderly populations in rural Ni…
Natural language is considered closely intertwined with human cognition, with linguistic structures posited to offer profound insights into the cognitive system. However, as a coding system, natural language encodes diverse objects into unified forms; its prominent formal features capture people’s a…
The process of nuclear fusion in the presence of a laser field is analyzed theoretically. The analysis is applicable to most fusion reactions and different kinds of currently available intense lasers, from X-ray free electron lasers to solid-state near-infrared lasers. Laser fields are shown to enha…
At the current juncture where the digital economy development wave intersects with the implementation of the cultural powerhouse strategy, the public library sector is undergoing a paradigmatic transformation from traditional "document resource centers" to modern "knowledge service hubs." Big data t…
As a key sector of energy consumption and carbon emissions, the construction industry's carbon reduction initiatives hold significant strategic importance for achieving the "dual carbon" goals. Based on data from Chinese listed construction enterprises from 2000 to 2021, this study empirically inves…
With the rapid penetration of artificial intelligence across multiple industries and scenarios, integrating the language understanding advantages of general large models with industry-specific knowledge bases in complex real-world applications has become a key challenge in constructing next-generati…
The PandaX-4T liquid xenon detector uses Hamamatsu 3-inch R11410-23 photomultiplier tubes (PMTs) as the light sensors for ultra-low radioactivity, high quantum efficiency, and long-term stability at cryogenic temperature. Each PMT was thoroughly tested in a dedicated chamber before being installed i…
Keyboard-based interaction may not accommodate various needs, especially for individuals with disabilities. While inertial sensor-based writing recognition is promising due to the sensors’ small size, wearability, and low cost, accurate recognition in the Chinese context is hampered by the difficult…
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…
In the synthesis of new superheavy nuclei, the various long half-lives of Pu and Cm isotopes render them promising as target materials for the fusion reactions. An investigation into the isotopic dependence of the actinide targets is important to select optimal reaction systems. Based on the dinucle…
OpenPFEM is a parallel finite element computing platform developed in C, designed for large-scale parallel finite element computations on high-performance computers. This paper introduces the fundamental architecture of OpenPFEM, with particular emphasis on our parallel data communication scheme bas…
Background Wilson's disease (WD) exhibits increased inflammatory levels that are closely associated with cognitive impairment. Studies have demonstrated that activation of the receptor for advanced glycation end products (RAGE)/nuclear factor κB (NF-κB) signaling pathway represents an important infl…
Familial hypercholesterolemia (FH) is a severe inherited metabolic disorder, among which homozygous FH (HoFH) is rare and particularly severe. Early screening, diagnosis, and treatment can substantially improve patient prognosis; however, the recognition and management of HoFH remain severely inadeq…
Background: Osteoporosis (OP) is a systemic bone disease characterized by reduced bone mass, destruction of bone microarchitecture, increased bone fragility, and susceptibility to fracture. China has a large population of OP patients. With advancing age, not only is bone health compromised, but musc…
Background Family doctor contract services have been widely promoted nationwide in China, yet challenges remain in further improving both the contract rate and service quality. Consequently, in-depth investigation and analysis of residents' actual demands for family doctor contract services is of pa…
Osteoporosis is a clinically common skeletal disease triggered by multiple factors. Its primary mechanism involves altering the body's inflammatory microenvironment, promoting increased osteoclastogenesis, which subsequently leads to enhanced bone resorption and decreased bone mass. Paradoxical bone…
Based on the Generalized reduced R-matrix theory, the RAC program (R-matrix analysis code) is used to analyze the experimental data of all the nuclear reaction channels related to the 5He system. The current calculations provide accurate and reliable evaluation data, and are in good agreement with t…
Gastric pi disease is a common digestive system disorder characterized by subjective gastric stuffiness and obstruction, with fullness and discomfort as the main clinical manifestations. This study utilized a 68-year-old female patient with gastric pi disease as the observation subject, employing co…
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…
This article provides a detailed report of the comprehensive nursing management of a 17-year-old female patient with anti-NMDAR encephalitis. The patient was admitted with chief complaints of "decreased appetite for 26 days, psychiatric and behavioral abnormalities for 17 days, limb convulsions for …
Cryogenic modules are key equipment systems in SHINE. To achieve a high quality factor Q0 for the superconducting cavities in cryogenic modules, it is essential to create a low-magnetic-field operating environment. Efficient magnetic shielding for superconducting cavities effectively shields against…
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…
Polarization-analyzed small-angle neutron scattering (PASANS) is an advanced technique that enables the selective investigation of magnetic scattering phenomena in magnetic materials and distinguishing coherent scattering obscured by an incoherent background, making it particularly valuable for cutt…
Objective To investigate the current status of academic burnout and academic resilience among undergraduate nursing students in universities located in ethnic minority regions, and to explore the relationship between academic burnout and academic resilience. Methods From October to December 2024, 70…
Spot-scanning carbon ion radiotherapy relies on ripple filters (RiFi) to enhance treatment efficiency. Existing multi-layer metallic mesh ripple filters (mRiFi) employ random stacking configurations, resulting in poor dose distribution consistency. This study designed three-dimensional mRiFi matrice…
The Shanghai High repetition rate XFEL and Extreme light facility (SHINE) utilizes high-Q 1.3 GHz superconducting radio-frequency (SRF) cavities for particle acceleration. These cavities, with an ultra-narrow bandwidth of approximately 32 Hz, are highly susceptible to Lorentz force detuning (LFD) an…
Due to its excellent heat transfer performance and compact structure, the printed circuit heat exchanger (PCHE) has become the mainstream heat exchange equipment between the secondary circuit of the supercritical carbon dioxide Brayton cycle and the primary circuit of the lead-cooled fast reactor. D…
To investigate the anatomical structural characteristics of oil tea (Camellia oleifera) leaves in high-altitude regions and their relationship with drought resistance, this study utilized 35 superior oil tea plants with excellent fruiting traits previously screened in the eastern high-altitude regio…
Panax notoginseng, a precious traditional Chinese medicinal material in China, faces problems such as low reproductive rates and extinction of wild resources. To investigate the flowering biology and breeding system characteristics of P. notoginseng and elucidate the reasons for its low seed set rat…
Taxodium ascendens and Taxodium distichum are common landscape color-leaf tree species whose leaves gradually turn orange (red) during the autumn-winter color transition period. Analyzing the physiological characteristics of leaves during the color transition period in these two Taxodium species is …
To screen for Eucalyptus robusta essential oil families with excellent antibacterial activity, this study utilized four 5-year-old E. robusta families from Nanning and Wuxuan as experimental materials. Essential oils were extracted from fresh leaves via steam distillation, their chemical components …
The High Energy Fragment Separator (HFRS), which is currently under construction, is a leading international radioactive beam device. Multiple sets of position-sensitive Twin Time Projection Chamber (TPC)detectors are distributed on HFRS for particle identification and beam monitoring. The twin TPCs…
In 1975, P. Erd {o}s proposed the problem of determining the maximum number $f(n)$ of edges in a graph of $n$ vertices in which any two cycles are of different lengths. In this paper, it is proved that $$f(n) geq n+32t-1$$ for $t=27720r+169 , (r geq 1)$ and $n geq frac{6911}{16}t^{2}+ frac{514441}{8…
In 1975, P. Erd {o}s proposed the problem of determining the maximum number $f(n)$ of edges in a graph with $n$ vertices in which any two cycles are of different lengths. In this paper, it is proved that $$f(n) geq n+ frac{107}{3}t+ frac{7}{3}$$ for $t=1260r+169 , (r geq 1)$ and $n geq frac{2119}{4}…
Let f(n) denote the maximum possible number of edges in an n-vertex graph containing no cycles of equal length. The problem of determining f(n) was posed by Erdos in 1975. This paper provides a lower bound for f(n).
The 28nm process has a high cost-performance ratio and has gradually become the standard for the fieldof radiation-hardened devices. However, owing to the minimum physical gate length of only 35nm, the physicalarea of a standard 6T SRAM unit is approximately 0.16 μm2, resulting in a significant enha…
HPV vaccination can effectively prevent not only the development of cervical cancer and its precancerous lesions, but also diseases in other anatomical sites caused by HPV infection. However, the vaccination status in China is not optimistic, with many young individuals exhibiting hesitation toward …
Objective: With the development of internet big data and machine learning methods, an increasing number of studies combine text analysis and machine learning to predict satisfaction. In research on building life satisfaction prediction models, to address the challenge of obtaining large amounts of e…
