Automatically translated preprints from the Chinese arXiv (ChinaXiv).
Showing 50 of 1495 papers
With the development of renewable energy, the voltage support strength of multi-infeed renewable energy systems is gradually decreasing, necessitating effective strength assessment methods. If all equipment is assumed to operate at rated operating points, existing power grid strength indicators and …
As China's first ecological civilization pilot zone, Fujian Province maintains excellent ecological environmental quality, with various ecological environment-related indices consistently ranking among the top nationwide. To investigate the causes of Fujian's ecological excellence over the past fift…
This paper focuses on exploring the physical logic of the relativity principle in particle dynamics. Through causal analysis of dynamics, it is found that the reason why Newton's second law suffers from difficulties regarding inertial frames and inertial forces is fundamentally due to the neglect of…
Signal detection theory is widely employed to explain individuals' decision-making processes across various types of cognitive tasks. However, a significant limitation of classical signal detection theory is its difficulty in further elucidating the intrinsic psychological mechanisms that underlie t…
The paper proposes a statistical fields theory of quantum reference frame underlying the Perelman's analogies between his formalism of the Ricci flow and the thermodynamics. The theory is based on a $d=4-\epsilon$ quantum non-linear sigma model (NLSM), interpreted as a quantum reference frame system…
To promote critical improvement of systems related to "external regulations for research integrity" both within and beyond the scientific community, this study examines the practical drivers and theoretical logic underlying the institutional practice of "random inspection of national science and tec…
A novel hybrid laser additive manufacturing process based on laser shock modulation of molten pool was proposed in this work. The flow behavior residual stress, and microstructure of the molten pool were comprehensively characterized by a combination of experiments and simulations. The relationship …
[Objective] Analyze the definition and properties of information capacity based on the information sextuple model, propose formulas relating information to matter, energy, and time, and provide theoretical reference for information science, particularly for applications in quantum information techno…
With growing interest in Laser Additive Manufacturing (LAM) of High-entropy alloys (HEAs) during most recent years, the design of compositional elements and process strategies are primary methods to overcome undesirable microstructures and defects. Here we propose a new approach, a novel real-time L…
Abstract: Glaciers are highly sensitive to climate change and are undergoing significant variations in mid-latitude regions. This study analyzed the spatiotemporal changes of typical glaciers and their responses to climate change during 1990–2015 across four distinct mountainous sub-regions in the X…
To improve the pointing and tracking accuracy at the Coude focus of alt-azimuth solar telescopes, this paper first simulates the tracking errors introduced at the Coude focus due to misalignment among the principal optical axis, azimuth axis, altitude axis, and derotator axis in the Coude optical pa…
Phased array feed is a receiver technology that places an array antenna at the focal plane field of a radio telescope to achieve higher gain and more flexible beam control. Given that, like array antennas, it is composed of multiple antenna elements arranged in a certain configuration, electromagnet…
The dynamic characteristics of new energy power systems are complex, featuring numerous stability analysis methods and stability criteria. Different stability methods/criteria correspond to different physical interpretations and applicable scopes, making it currently difficult to theoretically addre…
The first part of this paper proposes qualitative principles and quantitative evaluation metrics for assessing the adaptability of stability analysis methods/criteria from three perspectives: stability equivalence, nominality, and robustness. The second part further examines typical equipment includ…
Nuclear material license holders should develop a nuclear material accounting management system and achieve closed material balance. According to regulatory requirements, the implementation of nuclear material accountancy is based on physical inventory and material measurements. Generally, spent fue…
Metacognition is cognition about cognition that encompasses various aspects of cognition. In recent years, the integration of metacognition and facial cognition has begun to attract attention. The entry points for this integration include the applicability of metacognitive illusions (the Dunning-Kru…
Until now, image quality assessment has not addressed color issues. The literature on image quality assessment primarily evaluates the degree of degradation (deterioration) of image quality during image processing procedures such as compression and transmission. A planar image is essentially a two-d…
Polytomous attributes extend the traditional dichotomous attributes (i.e., two levels, typically defined as 0 and 1) in diagnostic assessments to multiple values (multiple levels can be 0, 1, …). They can describe not only whether examinees have mastered knowledge attributes but also the degree of m…
When two or more items are encoded in an integrated manner, familiarity can also support associative recognition—a viewpoint that has garnered substantial empirical support. However, disagreements persist regarding how integration influences both associative recognition and the recognition of indivi…
In the field of electronic packaging, lead-free solders are primarily binary or ternary Sn-based eutectic or near-eutectic alloys, with the Sn-rich phase constituting the matrix phase. To characterize the mechanical properties and stress-strain relationship of the Sn-rich phase, nanoindentation test…
This paper first elaborates on the concept of technological revolution and its necessary conditions, proposes and analyzes endogenous and exogenous agricultural disruptive technologies and their differences, and particularly introduces the concept of cross-boundary technologies while demonstrating t…
[Purpose] Large scientific facilities play a crucial role in promoting the output of major scientific and technological achievements, and their clustered development and collaborative innovation effects continuously lead regional industrial innovation and development. To enable large facilities to b…
Saxifraga stolonifera is a shade plant with relatively high ornamental value, commonly used in courtyard landscaping. Light intensity may have an important influence on the growth performance of Saxifraga stolonifera, especially leaf color, leaf spot formation, and their color depth, thereby affecti…
To enhance scientific understanding of farmland surface processes and improve agricultural water management in arid oasis regions, this study employed eddy covariance technique and utilized energy balance observational data from a vineyard during the growing season to analyze variation characteristi…
Elevational gradient is a key factor influencing patterns of species diversity. To investigate the elevational distribution patterns of species diversity in the tropical natural forests of Diaoluo Mountain, vegetation surveys were conducted in six tropical natural forest sample plots within an eleva…
To investigate the material basis for the antibacterial activity of Ailanthus altissima root bark, this study employed silica gel, Sephadex LH-20, and other chromatographic methods to separate and purify the methanol extract of Ailanthus altissima root bark. The structures of the monomeric compounds…
Carpinus tientaiensis is an endangered plant endemic to China, discontinuously distributed only within Zhejiang Province with sparse populations, currently in a critically endangered status. This study investigates the phylogeographic structure and phylogenetic differentiation of Carpinus tientaiens…
The response of plant growth and reproduction to future climate change has received widespread attention. To understand the spatial distribution pattern characteristics of clonal growth and sexual reproduction parameters of emergent macrophytes and the influence pathways of environmental factors on …
Hybridization of Chinese flowering cabbage can induce not only DNA sequence variations but also epigenetic changes independent of DNA sequence. To elucidate the formation mechanism of epigenetic diversity in Chinese flowering cabbage, this study employed F-MSAP to detect DNA methylation levels a…
Annonaceae is the most evolutionarily advanced and species-rich family in the basal angiosperm order Magnoliales. Current phylogenetic studies divide Annonaceae into four subfamilies: Anaxagoreoideae, Ambavioideae, Annonoideae, and Malmeoideae, comprising 107 genera and over 2,400 species, with appr…
Environmental regulation of secondary metabolites constitutes the theoretical and practical foundation for high-quality cultivation of medicinal plants. However, to date, research on the effects of short-term ultraviolet induction on the accumulation of medicinal active components remains relatively…
To investigate the chemical constituents in the leaves of the characteristic plant Champereia manillana var. longistaminea, this study employed silica gel column chromatography (CC), thin-layer chromatography (TLC), Sephadex LH-20 column chromatography, reversed-phase silica gel (RP-18) column chrom…
Biodiversity loss driven by factors such as global climate change and human activities has drawn considerable attention to biodiversity conservation from various sectors worldwide. Traditional biodiversity conservation has primarily focused on the species composition and distribution patterns of spe…
Different biological groups often exhibit substantial differences in species richness, a phenomenon commonly observed in ecological and biological research. However, the causes underlying this phenomenon remain an unresolved mystery. From a macroevolutionary perspective, the evolutionary time hypoth…
Biondia Schltr. is a Chinese endemic genus comprising approximately 13 species, whereas Merrillanthus Chun & Tsiang is a monotypic genus distributed exclusively in China and Cambodia. Currently, both genera have been subsumed into Vincetoxicum Wolf; however, deficiencies remain in sampling and phylo…
Sorbus plants exhibit polymorphic crown forms, exquisite flower colors, vibrant fruits, and diverse leaf colors throughout the seasons, possessing high horticultural ornamental value. However, due to the presence of interspecific hybridization, polyploidization, and apomixis within the genus, Sorbus…
Hainan Island has a topography that is high in the center and low around the periphery. From the central mountainous region to the eastern coastal plain, the composition of the flora has undergone certain changes due to differences in natural conditions and the degree of historical human disturbance…
The serial position effect in divergent thinking refers to the phenomenon where the number of ideas generated per unit time gradually decreases over time, while the originality of ideas progressively increases. Associative theory and the executive control hypothesis respectively focus on explaining …
A dilation X-ray detector (DIXD) based on time dilation and microchannel plate (MCP) gated technology has been reported. The DIXD passes a driving pulse along the transmission photocathode (PC) to obtain a dilated electron signal and finally achieves a high time resolution of 12 ps. Furthermore, the…
The temporal binding effect refers to the phenomenon where the time points of voluntary actions and their outcomes subjectively converge. This effect can be categorized into action binding and outcome binding, corresponding respectively to the temporal shifts of voluntary actions and action outcomes…
Against the backdrop of the COVID-19 pandemic, how to persuade individuals to receive COVID-19 vaccination has garnered attention from policymakers and researchers. This study investigates, from an approach-avoidance motivation perspective, the effects of different goal frames (positive vs. negative…
In recent years, the application of unmanned aerial vehicles (UAVs) has become increasingly widespread, and the coordination of multiple UAVs to accomplish tasks has substantially improved operational efficiency. Motivated by this phenomenon, numerous scholars have devoted themselves to research on …
To resist quantum algorithm attacks and address the vulnerability where malicious signers exploit the complete anonymity of ring signature technology to output multiple signatures for double-spending attacks, while simultaneously solving the problem of unnecessary system overhead waste, a novel latt…
Traditional ciphertext retrieval schemes in cloud environments generate document vectors and query vectors based on statistical models, without considering the deep semantic information of documents and requests. This paper proposes a deep semantic ciphertext retrieval model based on a hybrid cloud …
To address the issues of high latency in existing low-orbit satellite network authentication schemes that utilize centralized authentication methods and significant computational overhead arising from complex bilinear mappings, we introduce a certificateless authentication model and propose an effic…
To address issues such as low registration efficiency and large errors in the registration of two partially overlapping point clouds, we propose a point cloud registration algorithm based on mixed features sampled from the overlapping region. First, we predict the overlap score for each point throug…
Synthetic Minority Over-sampling Technique (SMOTE) is one of the effective methods for addressing class imbalance problems. However, SMOTE's linear interpolation mechanism restricts synthetic samples to the line connecting original samples, resulting in a lack of diversity in new samples, and this l…
To address the problems of low delivery timeliness and poor customer value in the logistics industry resulting from increasing vehicle ownership and escalating traffic congestion, this study proposes a time-varying routing optimization method for truck-drone collaborative delivery, comprehensively c…
Employing reinforcement learning to address robot manipulation problems offers numerous advantages; however, traditional reinforcement learning algorithms encounter challenges associated with sparse rewards, and the policies obtained are difficult to directly deploy in real-world environments. To en…
To address the problems of ambiguous boundaries between high-value and low-value parts and unreasonable disassembly depth of waste products, a multi-objective disassembly scheme decision-making method for products considering functional degradation of parts is proposed. The influence of specific par…
