Chifeng University (赤峰学院) is a public university formed by the combination of Chifeng Normal College of Nationalities and other four academies. It was approved by the Ministry of Education of the People's Republic of China in 2003. It is in the city of Chifeng, the birthplace of the Hong Shan cultures. (The city has scenic spots and is a tourist destination.
Genitourinary infections (GUIs) during pregnancy are a significant clinical concern linked to maternal morbidity. To investigate the potential causal effect of gut Streptococcus abundance on the risk of maternal genitourinary infection during pregnancy using Mendelian randomization (MR), we performed a two-sample MR analysis using publicly available genome-wide association study (GWAS) summary statistics. Genetic instruments for gut Streptococcus abundance were obtained from the MiBioGen consortium (N = 18,340). Outcome data for maternal genitourinary infection (ICD-10 O23.x) were sourced from the FinnGen consortium (N = 111,731). The inverse-variance weighted (IVW) method was used as the primary analysis, supplemented by sensitivity analyses including MR-Egger, weighted median, and MR-PRESSO to assess pleiotropy. We further assessed potential mediation via systemic inflammation (C-reactive protein, interleukin-6) and associations with adverse pregnancy outcomes (APOs). Genetically predicted higher gut Streptococcus abundance was associated with a reduced risk of maternal genitourinary infection (IVW odds ratio [OR] = 0.63, 95
Organic fluid activity and carbonate alteration are developed in the Lower Cretaceous uranium-bearing red beds in the southwestern Ordos Basin. To elucidate the origin of organic-related carbonate alteration, this study investigated the mineralisation through core alteration observations, spectral core scanning, scanning electron microscopy, and electron probe microanalysis. In addition, fluid inclusions were characterised using microscopy and microthermometry. The results indicate that: (1) Secondary carbonate alteration commonly occurs within bleached zones in mineralised sandstone intervals and surrounding rocks of the Luohe Formation, accompanied by evident hydrocarbon shows. Carbonate minerals exhibit paragenetic and associative relationships with uranium minerals and pyrite. (2) The homogenisation temperatures of organic inclusions in secondary calcite cements of mineralised sandstone range from 60 degrees C to 165 degrees C, with salinities between 2% and 23.18% NaCl eq. The distribution of secondary carbonate alteration is spatially correlated with organic fluid activity, and the extent of alteration shows a positive correlation with variations in the temperature-salinity conditions of the organic inclusions. It is concluded that the association of secondary carbonate alteration with organic fluids, bleaching, pyritisation, and uranium mineralisation may be attributed to the dual alteration of sandstone by moderately acidic and reducing organic fluids at low to medium temperatures.
With the rapid development of 6G communication, optoelectronic integration, and advanced stealth technologies, electromagnetic functional materials are increasingly required to achieve collaborative broadband responses across microwave, terahertz, and optical bands, posing urgent demands for breakthroughs in multispectral electromagnetic response mechanisms and device innovation. This perspective systematically reviews the research advances in 2D electromagnetic materials and their derived multispectral devices, with a particular emphasis on elucidating the correlations between material structures, electromagnetic properties, and multispectral response behaviors. We systematically look ahead at the future development directions of multi-spectral electromagnetic responses and devices from five key aspects, encompassing cross-domain signal conversion systems, environment-driven full-spectrum adaptive reconstruction, interface polarization engineering of low-dimensional nanomaterials, cross-domain integration under extreme environments, and programmability of dynamic spectral responses. These guidelines are intended to lay a theoretical and technical foundation for advancing the development of next-generation intelligent electromagnetic systems, thereby facilitating their applications in fields such as communications, sensing, medicine, and national defense.
This paper aims to understand the resistance of multi-cell T-shaped concrete-filled steel tubular (MT-CFST) columns subjected to eccentric compression about their major principal axis. Experimental investigations were first conducted on 15 specimens, including stub and intermediate columns, to examine their nonlinear loaddisplacement responses and failure modes. Key experimental parameters include member slenderness, loading angle, and eccentricity. Secondly, a detailed finite element (FE) model employing the concrete damaged plasticity (CDP) model for concrete infill and the von Mises plastic model for steel tubes was developed and validated against the experimental results. The validated FE model was then employed for a broader range of previously untested geometric and material configurations with various eccentricities, to explore the effects of member slenderness, loading angle, steel ratio, and single-cell depth-to-width ratio on the nondimensional axial force-bending moment interaction relationships. Furthermore, the applicability of existing axial force-bending moment interaction equations from GB50936-2014, originally formulated for conventional CFST columns, was evaluated, revealing noticeable inaccuracies for MT-CFST columns. Consequently, new axial force-bending moment interaction equations specifically tailored to MT-CFST columns, accounting for key parameters affecting eccentric compressive behavior were proposed. Validation demonstrates that these developed equations consistently yield significantly improved predictions, thus offering a reliable and practical design tool for the design of MT-CFST columns under eccentric compression.
In this research, stable isotope analysis of plants was integrated with macrofossil studies to investigate social conditions underpinning millet cultivation and mundane food production at the Bronze Age village Erdaojingzi (3600-3500 cal. yr BP), Northeast China. Specifically, we sought to answer two questions: 1) Did different households (or other groupings) manage cultivation collectively in similar environments, or did house groups have unequal access to (or ownership of) different farmlands? 2) Were millet harvests organized according to house group distinctions, or were they equally distributed among households? How were crops harvested in the field within this social context? Our results seem to suggest that both cultivation and harvest were configured in the context of the household economy. Millet was cultivated in environments only accessible to certain house groups, while the products were shared among household members rather than pooled across the whole community. The correlation between morphologically attested grain sizes and isotopic results indicated circumstances that grains from the same family plot were harvested multiple times sequentially, rather than in a single seasonal harvesting regime. Extensive archaeobotanical sampling at Erdaojingzi has enabled fine-grained analysis of how millet cultivation and production were woven into social conditions operating both in the field and within the settlement.
