Meng Cai;Han Luo;Xiao Meng;Jiaqi Liu; 《Journal of Computer Assisted Learning》2024,40(4):1898-1921

Higher vocational education is an essential part of the higher education system that complements conventional education. In the context of information and communication technology (ICT) development and academic competition, more and more literature has proved the importance of ICT use in educational development (academic achievement and mental health) and the relationship between information literacy and the educational development of higher vocational students.  相似文献   

    

Shaofeng Wei;Ruijie Chen;Xiaoyi Liu;Haoran Ma;Yang Peng;Xiefei Wu;Yong An;Xinru Wang;Peng Luo; 《Food Science & Nutrition》2024,12(12):10463-10476

Moringa is a type of plant that is used both for medicinal and food. Moringa seed (MS) are rich in volatile oil and have initially been employed to treat diseases of the nervous system. Insomnia, a prevalent neurological disorder, has led to this study's aim: to extract the essential oil from MS and analyze its potential to improve sleep. This study utilized petroleum ether for the thermal extraction of the essential oil from MS, which was then subjected to compositional analysis using Gas Chromatograph Mass Spectrometer (GC–MS). P-chlorophenyl alanine (PCPA) was used to induce an insomnia model in Sprague–Dawley (SD) rats. Following the successful establishment of the model, the MS essential oil was administered at concentrations of 10%, 5%, and 2.5% to investigate its sedative and hypnotic effects. The efficacy of the MS essential oil was assessed by observing the general condition of rats in each group, conducting an open field test, a pentobarbital sodium righting test, and measuring the serum 5-HT (5-hydroxytryptamine) levels and hypothalamic GABA (γ-aminobutyric acid) content. GC–MS analysis of the MS essential oil revealed a rich composition, including oleic acid, palmitoleic acid, stigmasterol, and γ-stigmasterol, among other substances. Through the assessment of the rats' general condition, behavioral tests, and blood biochemical assays, it was inferred that MS essential oil aromatherapy can reduce the rat's locomotor activity, increase their interest in activity and exploration, enhance the serum 5-HT levels, and elevate hypothalamic GABA content. Consequently, it can be concluded that MS essential oil has a sedative and hypnotic effect.  相似文献   

    

Lei Dou;Zimu Zhang;Wenqing Yang;Yaobing Chen;Kai Luo;Jianquan Kan; 《Food Science & Nutrition》2024,12(9):6206-6225

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Yang Zou;Yanfen Zhang;Hui Zhang;Bin Cao;Zixin Luo;Huawei Duan; 《Packaging Technology and Science》2024,37(10):965-974

Studies have shown that fluoridated reagents for oil and water resistance are harmful to the human bodies and the environment. Consequently, the developments of nontoxic, environmentally friendly, fluorine-free and degradable materials have received increasing attentions. Here, we introduce a novel method for fabricating a hydrophobic and oleophobic paper-based packaging material through the application of chitosan/carnauba wax emulsions. These emulsions were prepared via high-shear homogenization, blending melted carnauba wax with chitosan in acetic acid aqueous solutions. The stable chitosan/carnauba wax emulsion with particle size of 430 nm was prepared at the chitosan concentration of 1.5 wt%, the carnauba wax concentration of 8 wt% and temperature of 85 °C. After 10 g/m2 of chitosan/carnauba wax emulsion was applied to the paper surface, the oil and water resistance of the paper was significantly improved. The experimental results of kit rating value, oil contact angle, Cobb60 value and water contact angle were 9.5 ± 0.6, 86.6 ± 2.1°, 8.90 ± 1.62 g/m2 and 123.5 ± 2.6°, respectively. The application of chitosan/carnauba wax emulsion coating on papers provided a significantly lower water vapour transmission rate (WVTR, 78.45 ± 18.92 g/m2·24 h) and oxygen transmission rate (OTR, 94.26 ± 20.21 g/m2·24 h) as compared to the original paper, which met the needs of strawberry packaging.  相似文献   

    

Xiaoli Luo;Renhao Jiao;Tao Ma;Yunjie Liu;Zhu Gao;Xiuhong Shen;Qianqian Ren;Heng Zhang;Xiaowei He; 《International journal of imaging systems and technology》2024,34(5):e23166

In this paper, a reduced accelerated adaptive fast iterative shrinkage threshold algorithm based on Smooth-Lasso regularization (SL-RAFISTA-BB) is proposed for fluorescence molecular tomography (FMT) 3D reconstruction. This method uses the Smooth-Lasso regularization to fuse the group sparse prior information which can balance the relationship between the sparsity and smoothness of the solution, simplifying the process of calculation. In particular, the convergence speed of the FISTA is improved by introducing a reduction strategy and Barzilai-Borwein variable step size factor, and constructing a continuation strategy to reduce computing costs and the number of iterations. The experimental results show that the proposed algorithm not only accelerates the convergence speed of the iterative algorithm, but also improves the positioning accuracy of the tumor target, alleviates the over-sparse or over-smooth phenomenon of the reconstructed target, and clearly outlines the boundary information of the tumor target. We hope that this method can promote the development of optical molecular tomography.  相似文献   

    

Weidong Wang;Jun Peng;Wenbo Hu;Jin Wang;Xinyue Xu;Qasim Zaheer;Shi Qiu; 《Computer-Aided Civil and Infrastructure Engineering》2024,39(13):2010-2027

Three-dimensional displacement monitoring over long distances has been a long-standing concern in the structural health monitoring industry. In this study, a multi-degree-of-freedom slope displacement monitoring method is developed by fusing computer vision and the 3D point triangulation method. Attributed to this method, the problems of outdoor binocular camera calibration, multi-target mismatching, and outdoor illumination effects were solved. First, a two-stage camera calibration method is proposed to accurately calibrate intrinsic and extrinsic camera parameters under a large field of view and long working distance conditions. Second, the adaptive spatial-frequency method is proposed to calculate the coding and pixel coordinates of the monitored target. In this step, to solve the problem of mismatching monitored points in different camera frames, the Augmented Reality University of Cordoba code is introduced to provide a unique identity code for each monitored point. To mitigate the impact of illumination and other factors on pixel coordinate calculation, an adaptive pixel coordinate calculation method that combines information from the spatial and frequency domains is proposed., Third, based on the intrinsic and extrinsic parameters of the stereo camera and the pixel coordinates of the monitored points, the 3D coordinates of the monitored points are obtained through triangulation. Finally, the accuracy experiments and stability experiments are conducted. According to the results of the experiments, the measurement distance is positively correlated with the measurement error. And the baseline length is negatively correlated with the measurement error in the z-direction. Ultimately, we suggest that the ratio of baseline length to measurement distance should be greater than 40%. When the recommended value is satisfied, the measurement error is less than 1 mm when the measurement distance is less than 40 m. When the measurement distance is equal to 90 m, the measurement error is less than 5 mm. Meanwhile, stability experiments of the algorithm were carried out, and in a period of outdoor validation experiments, the fluctuations were only sub-millimeter, demonstrating good anti-interference performance. Moreover, the method proposed in this study successfully monitored a landslide disaster in Guangxi, which demonstrated its outstanding practical application capabilities.  相似文献   

    

Wei Han  Chen Li  Sanjun Yang  Peng Luo  Fakun Wang  Xin Feng  Kailang Liu  Ke Pei  Yuan Li  Huiqiao Li  Luying Li  Yihua Gao  Tianyou Zhai 《Small (Weinheim an der Bergstrasse, Germany)》2020,16(23)

2D wide‐bandgap semiconductors demonstrate great potential in fabricating solar‐blind ultraviolet (SBUV) photodetectors. However, the low responsivity of 2D solar‐blind photodetectors still limits their practical applications. Here, high‐responsivity solar‐blind photodetectors are achieved based on 2D bismuth oxychloride (BiOCl) flakes. The 2D BiOCl photodetectors exhibit a responsivity up to 35.7 A W^?1 and a specific detectivity of 2.2 × 10¹⁰ Jones under 250 nm illumination with 17.8 µW cm^?2 power density. In particular, the enhanced photodetective performances are demonstrated in BiOCl photodetectors with increasing ambient temperature. Surprisingly, their responsivity can reach 2060 A W^?1 at 450 K under solar‐blind light illumination, maybe owing to the formation of defective BiOCl grains evidenced by in situ transmission electron microscopy. The high responsivity throughout the solar‐blind range indicates that 2D BiOCl is a promising candidate for SBUV detection.  相似文献   

    

Jiayingzi Wu  Hyeon Jeong Lee  Liyan You  Xuyi Luo  Tsukasa Hasegawa  Kai‐Chih Huang  Peng Lin  Timothy Ratliff  Minoru Ashizawa  Jianguo Mei  Ji‐Xin Cheng 《Small (Weinheim an der Bergstrasse, Germany)》2020,16(19)

Development of molecular probes holds great promise for early diagnosis of aggressive prostate cancer. Here, 2‐[3‐(1,3‐dicarboxypropyl) ureido] pentanedioic acid (DUPA)‐conjugated ligand and bis‐isoindigo‐based polymer (BTII) are synthesized to formulate semiconducting polymer nanoparticles (BTII‐DUPA SPN) as a prostate‐specific membrane antigen (PSMA)‐targeted probe for prostate cancer imaging in the NIR‐II window. Insights into the interaction of the imaging probes with the biological targets from single cell to whole organ are obtained by transient absorption (TA) microscopy and photoacoustic (PA) tomography. At single‐cell level, TA microscopy reveals the targeting efficiency, kinetics, and specificity of BTII‐DUPA SPN to PSMA‐positive prostate cancer. At organ level, PA tomographic imaging of BTII‐DUPA SPN in the NIR‐II window demonstrates superior imaging depth and contrast. By intravenous administration, BTII‐DUPA SPN demonstrates selective accumulation and retention in the PSMA‐positive tumor, allowing noninvasive PA detection of PSMA overexpressing prostate tumors in vivo. The distribution of nanoparticles inside the tumor tissue is further analyzed through TA microscopy. These results collectively demonstrate BTII‐DUPA SPN as a promising probe for prostate cancer diagnosis by PA tomography.  相似文献   

    

Guihua Liu  Dan Luo  Rui Gao  Yongfeng Hu  Aiping Yu  Zhongwei Chen 《Small (Weinheim an der Bergstrasse, Germany)》2020,16(37)

The practical application of lithium–sulfur (Li–S) batteries is hindered by the “shuttle” of lithium polysulfides (LiPS) and sluggish Li–S kinetics issues. Herein, a synergistic strategy combining mesoporous architecture design and defect engineering is proposed to synthesize multifunctional defective 3D ordered mesoporous cobalt sulfide (3DOM N‐Co₉S_8?x) to address the shuttling and sluggish reaction kinetics of polysulfide in Li–S batteries. The unique 3DOM design provides abundant voids for sulfur storage and enlarged active interfaces that reduce electron/ion diffusion pathways. Meanwhile, X‐ray absorption spectroscopy shows that the surface defect engineering tunes the CoS₄ tetrahedra to CoS₆ octahedra on Co₉S₈, endowing abundance of S vacancies on the Co₉S₈ octahedral sites. The ever‐increasing S vacancies over the course of electrochemical process further promotes the chemical trapping of LiPS and its conversion kinetics, rendering fast and durable Li–S chemistry. Benefiting from these features, the as‐developed 3DOM N‐Co₉S_8?x/S cathode delivers high areal capacity, superb rate capability, and excellent cyclic stability with ultralow capacity fading rate under raised sulfur loading and low electrolyte content. This design strategy promotes the development of practically viable Li–S batteries and sheds lights on the material engineering in related energy storage application.  相似文献   

    

Maolan Luo  Qing Yang  Wenbin Yang  Junhui Wang  Fangfang He  Kewei Liu  Hongmei Cao  Hongjian Yan 《Small (Weinheim an der Bergstrasse, Germany)》2020,16(20)

Graphitic carbon nitride nanosheet (CNS) represents an attractive candidate for solar fuel production. However, the abundant defects in CNS lead to serious charge recombination and limit the photocatalytic performance. Herein, the synthesis of a CNS–covalent organic framework (CNS–COF) nanosheet composite is presented for the first time. CNS with significantly reduced defects is first obtained by rationally tuning the thermal exfoliation conditions of bulk carbon nitride. Subsequent modification of the CNS with trace COF nanosheet through chemical imine bonding can not only passivate the surface termination of carbon nitride in the boundary region, but also establish strong electronic coupling between these two components. As a consequence, enhanced charge separation and photocatalytic activity are realized on the resulting CNS–COF nanosheet composite. Under optimum conditions, hydrogen is evolved at a rate of 46.4 mmol g^?1 h^?1. This corresponds to an apparent quantum efficiency of 31.8% at 425 nm, which is among the best values ever reported for carbon nitride‐based materials.  相似文献