Guizhou Education University

Abstract Double neutron-star (DNS) systems are key compact-binary laboratories for testing gravitational waves and general relativity. It is highly necessary for research on the origin and evolutionary pathways of the DNS system. The Extreme Deconvolution Method, based on a Gaussian mixture model, is applied to an updated sample of 33 DNS pairs，which might provide a clue for understanding the DNS formation scenarios. The result of the Bayesian Information Criterion (BIC) confirms the bimodality of the DNS in the orbital periodeccentricity plane, which can be attributed to different formation mechanisms. 14 DNS systems with low eccentricities and orbital periods shorter than 1 day originated from low-energy electron capture supernovae, which merge within the Hubble time. 18 DNS systems exhibiting longer orbital periods and higher eccentricities are formed through core collapse supernova explosions. Based on 13 DNS systems with precisely measured component masses, the merger timescales are calculated, and it is found that most DNSs with orbital periods shorter than 1 day are expected to merge within the Hubble time. This result provides further constraints on the DNS merger rate within the Galaxy.

The rising demand for ultrasensitive, field-deployable detection technologies has intensified interest in nanoprobe-based monitoring of environmental contaminants. Fomesafen (FSA), a widely used post-emergence agricultural herbicide, poses significant ecological and health risks due to its slow degradation and prolonged environmental persistence. Addressing the need for rapid in situ detection, we propose a novel turn-on fluorescent nanoprobe (RBO) that combines small-molecule self-assembly, target-triggered disassembly, and adaptive signal amplification to achieve highly sensitive and quantitative detection of FSA. This "immediate-response" system exhibits exceptional performance, including high selectivity, sub-minute response time (< 1min), high sensitivity (LOD = 0.39 µM), and a dual fluorescent-colorimetric readout that enhances detection reliability. Field applications demonstrate that the nanoprobe supports diverse use cases, enabling on-site quantification of FSA on food surfaces and in soil, as well as real-time visualization and localization of FSA in plant tissues and zebrafish models for accurate assessment of pesticide-induced crop damage and ecological risk. Additionally, RBO has been adapted into test strips and hydrogel-based portable sensors and integrated with smartphone-imaging workflows, substantially improving on-site detection efficiency and device miniaturization. Collectively, this nanoprobe offers a powerful and reliable platform for monitoring FSA across agricultural, environmental, and biological matrices.

Research on graduate employment had traditionally emphasized talent cultivation while insufficiently addressing labor market dynamics, which generated structural challenges such as persistent mismatches between labor supply and demand and delayed policy responses. To address these issues, this study adopted a demand-driven perspective to investigate the dynamics and evolutionary patterns of graduate employment in China, with particular attention to industry-specific competency structures and shifting talent requirements. Drawing on more than one million job postings for recent university graduates collected from leading Chinese recruitment platforms, the analysis employed text mining, statistical modeling, and longitudinal trend analysis to uncover patterns in graduate labor demand. The findings showed that employers placed sustained emphasis on soft skills, while demand for digital and applied expertise, particularly in fields such as computer science and artificial intelligence, experienced substantial growth. Interdisciplinary integration was identified as a salient dimension of contemporary talent requirements. Although recruitment activities were disrupted by the COVID-19 pandemic, which resulted in a prolonged reduction in job opportunities, post-pandemic recruitment salaries exhibited a gradual yet fluctuating upward trend, which suggested a progressive realignment between graduate supply and demand. This study enriched the theoretical understanding of demand-driven employment dynamics, provided empirical evidence to support anticipatory policy development.

Glacial isostatic adjustment (GIA) profoundly influences postglacial tectonics, sea-level change, and geothermal systems; however, its role during the deglaciation of the Neoproterozoic Snowball Earth remains poorly constrained. Sheet-crack is one of the diagnostic structures in Marinoan (635 Ma) cap carbonates that overlie glacial tillites. Available geochemical evidence indicates that sheet-crack cements precipitated immediately following crack formation, potentially preserving GIA-driven fluid signatures. This study presents fluid inclusion microthermometric data from sheet-crack quartz and barite cements along shelf-to-slope transects on the Yangtze Block, South China. Fluid inclusion homogenization temperatures (Th) reveal the occurrence of a ubiquitous low-temperature hydrothermal event, with most Th values clustering at ∼145 °C–190 °C and ∼120 °C–180 °C in platform facies and slope facies, respectively. Fluid salinities in platform facies exhibit unimodal distributions and low to moderate (∼2–8 wt % NaCl eq.), while those in slope facies show broadly continuous distributions, with most values concentrated at intermediate-to-high salinities (∼6–15 wt % NaCl eq.) and a subordinate low-salinity tail. These patterns are consistent with varying contributions from recirculated, geothermally heated seawater and basinal brines. We propose a refined model in which GIA-related geothermal anomalies promoted a widespread low-temperature hydrothermal circulation event, responsible for sheet-crack cementation shortly after the Marinoan deglaciation, South China.

Gynostemma guangxiense X. X. Chen & D. H. Qin, belonging to the family Cucurbitaceae, is a perennial creeping herbaceous plant endemic to China with potential medicinal and health value. Here, we report the high-quality chromosome-level genome of G. guangxiense obtained by integrating Illumina short read, PacBio high-fidelity (HiFi) long read, Hi-C, and RNA-Seq technologies. The genome is anchored to 11 pseudochromosomes with a total size of 565.18 Mb, with a scaffold N50 of 52.63 Mb, achieving a complete BUSCO of 98.00%. Furthermore, we identified 27,527 protein-coding genes, of which 97.75% were functionally annotated. This genome provides an important molecular foundation for adaptive evolution, genetic conservation, and effective development of valuable medicinal plant resources within the Gynostemma genus.

The tourism industry is driven by multiple factors. However, current research on the impact of culture on inbound and outbound tourism demand remains limited, particularly regarding the comparative effects of various types of cultural dissemination activities. This study employs time series analysis methods, collecting data on inbound tourist arrivals, tourism revenue, Confucius Institutes, international students in China, and cultural product exports. Vector autoregression (VAR) and impulse response functions (IRF) were used to analyze the short-term dynamics and long-term equilibrium relationships among these variables. The findings reveal a significant positive correlation between cultural dissemination activities and inbound tourism demand, exhibiting a lagged effect. The long-run equilibrium relationship indicates a strong positive correlation between the number of international students and tourist arrivals. Furthermore, the number of Confucius Institutes positively impacts both tourist arrivals and tourism revenue. This study confirms the crucial role of cultural dissemination in promoting inbound tourism. However, different forms of cultural dissemination activities may influence tourism demand through distinct mechanisms. The findings suggest that cultural exchange activities not only stimulate inbound tourism demand but also help disperse visitor flows and enhance destination management, playing a vital role in achieving sustainable tourism development. Lastly, this study provides robust empirical evidence that aligns with UNESCO’s sustainable tourism indicators.