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Cable structures are widely used in large-span constructions due to their flexible shapes, high strength, and lightweight. However, the high-temperature performance of cable-clamped joints affects the overall fire resistance of cable structures. Moreover, the galvanized layer of cable may melt at high temperatures, which decreases the anti-slip capacity. But, the influence of the galvanized layer on the high-temperature anti-slip capacity has not been studied. In this study, the high-temperature anti-slip capacity of a commonly used type of galvanized cable-clamped joints is investigated by various high-temperature experiments. It is found that the anti-slip bearing capacity of the new cable-clamped joint at 300 °C is 60.30%, which is lower than that at the normal temperature. Compared with existing studies, the results at normal temperature are in good agreement with the theoretical values obtained from literature, which validates the correctness of the experimental system. The difference between the high-temperature test results and the theoretical formula calculations is significant, with the minimum difference reaching 28.5%. Furthermore, the anti-slip bearing capacity of the cable-clamp joint decreases as the thickness of the zinc coating at high temperatures. Therefore, galvanized layer thickness and high temperature should be considered in the assessment of the high-temperature performance of cable structures. Compared with the research conclusions of domestic scholars, it can be seen that the test results in this paper are more reliable, which can provide a useful reference for the design of cable structures. [ABSTRACT FROM AUTHOR]

With the increasing awareness of the hazards associated with ammonia (NH3) contamination and the potential application of NH3 detection in physical health monitoring, the exploration of high‐performance NH3 sensors has attracted significant attention in recent years. In this paper, we prepared copper iodide (CuI) nanomaterials combined with CuI‐isopropanolamine (C3H9NO) complexes by dissolving CuI in C3H9NO and subsequent annealing. The resulting product demonstrated exceptional sensing performance to 0.15 (mole fraction) NH3, exhibiting a maximum response of 7.5×105 with a response time of 5 s. The achieved detection limit was 10 ppm. Our findings provide a valuable reference for further research on NH3 sensors utilizing complexes formed by copper compounds and organic amines. [ABSTRACT FROM AUTHOR]

Breast cancer is the leading cause of death and morbidity among women. A major challenge for clinical management of breast cancer is the dissemination of breast cancer cells from the primary tumor site via lymphatic drainage, resulting in metastatic tumor spread. Recent studies have found that high expression of the microRNA miR‐146a‐5p is associated with better survival outcomes for breast cancer patients. However, the mechanisms for this prognostic benefit are not fully elucidated, including whether or not miR‐146a‐5p plays a role in suppression of lymphatic dissemination. In this study, we investigated the role and uncovered functional mechanisms of miR‐146a‐5p in breast cancer. We found that high expression of miR‐146a‐5p is associated with better clinical outcomes, specifically in the patients with N0 breast cancer. In culture, miR‐146a‐5p overexpression in MCF‐7 breast cancer cells suppressed cell migration and lymphangiogenesis in lymphatic endothelial cells. When implanted in the mammary fat pad of mice, we observed that miR‐146a‐5p overexpressing MCF‐7 suppressed lymphatic dissemination but had no effect on tumor progression in the primary site. This suppression was associated with fewer disseminated cancer cells and reduced lymphangiogenesis in the draining and distal lymph nodes. In conclusion, these results suggest that miR‐146a‐5p can exhibit a protective role against breast cancer metastasis, and it can be a therapeutic target for breast cancer. [ABSTRACT FROM AUTHOR]

For the autonomous and intelligent operation of robots in unknown environments, simultaneous localization and mapping (SLAM) is essential. Since the proposal of visual odometry, the use of visual odometry in the mapping process has greatly advanced the development of pure visual SLAM techniques. However, the main challenges in current monocular odometry algorithms are the poor generalization of traditional methods and the low interpretability of deep learning-based methods. This paper presented a hybrid self-supervised visual monocular odometry framework that combined geometric principles and multi-frame temporal information. Moreover, a post-odometry optimization module was proposed. By using image synthesis techniques to insert synthetic views between the two frames undergoing pose estimation, more accurate inter-frame pose estimation was achieved. Compared to other public monocular algorithms, the proposed approach showed reduced average errors in various scene sequences, with a translation error of 2.211 % and a rotation error of 0.418 ∘ / 100 m. With the help of the proposed optimizer, the precision of the odometry algorithm was further improved, with a relative decrease of approximately 10 % intranslation error and 15 % in rotation error. [ABSTRACT FROM AUTHOR]

Cr doped ZnAl2O4 spinel samples were prepared by the traditional solid state reaction and co-precipitation synthetic route, and the results suggest that the co-precipitation method has some superiority in contrast to the solid state reaction method. XRD, FT-IR, and XPS spectra confirmed that the well-crystallized spinel cubic phase of ZnAl2O4: Cr3+ samples were successfully formed. The morphology of the samples was investigated by FE-SEM and FE-TEM, and the results show that the samples by the co-precipitation route can generate a smaller size of particles compared to the solid state reaction. Photoluminescence excitation spectra monitored at 686 nm are comprised of two broad excitation bands near 530 nm and 395 nm, and the emission spectra show emissions ranging from 640 to 780 nm, due to the 2E → 4A2 spin-forbidden transition of Cr3+ ions in spinel lattices. The optimized concentration monitored at 686 nm is 1%, while at 693 nm is 3.5%. Compared with the samples by solid state reaction method, the samples by co-precipitation method show preferable luminescent properties, such as the higher photoluminescence intensity and higher quantum efficiency. Several phosphor-converted LEDs were to investigate the applicability of the prepared samples. The results confirm that the phosphor has potential applications in plant growth and supplementing the red region in white-LEDs and the phosphors prepared by co-precipitation are more suitable to be used in phosphor-converted LED devices due to their preferable luminescent properties. [ABSTRACT FROM AUTHOR]