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Thermal barrier coating technology is an important technical means for advanced aero - engines and ground gas turbines to achieve high efficiency, low emissions and long life. The research progresses of traditional thermal barrier coating materials, preparation methods and failure mechanisms were systematically summarized. Furthermore, the research status and deficiencies of new coating materials, preparation processes and microstructures for thermal barrier coatings were discussed emphatically. Finally, the research trend of thermal barrier coating materials was prospected.

Action quality assessment refers to evaluate the action quality performed by human in video,such as calculating the quality score,level and evaluating the performance of different people.It is an important direction in video understanding and computer vision research.This paper summarizes the main methods of action quality assessment,including action quality score prediction methods,level classification and ranking methods.The performance of these methods on public datasets is also analyzed.Finally,the challenge problems in future research are discussed.

In order to improve the corrosion resistance of anticorrosive coatings and expand the application scope of Iranian rock asphalt, solentless Iranian rock asphalt anticorrosive coatings were prepared throuth a two-component process using the matrix asphalt, Iranian rock asphalt and epoxy resin as film - forming materials with the addtion of fillers, various additives and other components. The anti - corrosion properties of such coatings were studied through AC impedance test and acid, alkali and salt corrosion resistance test. Results showed that when the content of Iranian rock asphalt was 15%, the comprehensive properties of modified asphalt were best. The corrosion resistance of the prepared Iranian rock asphalt anticorrosive coating was much better than that of the petroleum asphalt anticorrosive coating. The corrosion resistance time to acid, alkali and salt immersion was prolonged by more than 10 days. The viscosity of Iranian rock asphalt anticorrosive coating was large at room temperature, and good coating effect was achieved when the coating temperature was about 60 ℃.

Purpose: To assess the diagnostic utility of clinical magnetic resonance spectroscopy (MRS) and diffusion-weighted imaging (DWI) in distinguishing between histological grading and isocitrate dehydrogenase (IDH) classification in adult diffuse gliomas. Methods: A retrospective analysis was conducted on 247 patients diagnosed with adult diffuse glioma. Experienced radiologists evaluated DWI and MRS images. The Kruskal-Wallis test examined differences in DWI and MRS-related parameters across histological grades, while the Mann–Whitney U test assessed molecular classification. Receiver Operating Characteristic (ROC) curves evaluated parameter effectiveness. Survival curves, stratified by histological grade and IDH classification, were constructed using the Kaplan–Meier test. Results: The cohort comprised 141 males and 106 females, with ages ranging from 19 to 85 years. The Kruskal-Wallis test revealed significant differences in ADC mean, Cho/NAA, and Cho/Cr concerning glioma histological grade (P <.01). Subsequent application of Dunn's test showed significant differences in ADC mean among each histological grade (P <.01). Notably, Cho/NAA exhibited a marked distinction between grade 2 and grade 3/4 gliomas (P <.01). The Mann–Whitney U test indicated that only ADC mean showed statistical significance for IDH molecular classification (P <.01). ROC curves were constructed to demonstrate the effectiveness of the specified parameters. Survival curves were also delineated to portray survival outcomes categorized by histological grade and IDH classification. Conclusions: Clinical MRS demonstrates efficacy in glioma histological grading but faces challenges in IDH classification. Clinical DWI's ADC mean parameter shows significant distinctions in both histological grade and IDH classification. [ABSTRACT FROM AUTHOR]

Purpose: Develop an albumin nanoparticle-based nanoprobe for targeted glioblastoma (GBM) diagnosis and treatment, utilizing Angopep-2 for low-density lipoprotein receptor-related protein (LRP) targeting. Methods: Combined albumin-coated superparamagnetic iron oxide (SPIO), Carmustine (BCNU), and indocyanine green (ICG). Assessed morphology, size, Zeta potential, fluorescence, and drug encapsulation. Conducted in vitro fluorescence/MRI imaging and cell viability assays, and in vivo nanoprobe accumulation evaluation in brain tumors. Results: ANG-BSA/BCNU/ICG MNPs exhibited superior targeting and cytotoxicity against GBM cells in vitro. In vivo, enhanced brain tumor accumulation during imaging was observed. Conclusion: This targeted imaging and drug delivery system holds promise for efficient GBM therapy and intraoperative localization, addressing Blood-brain barrier (BBB) limitations with precise drug delivery and imaging capabilities. [ABSTRACT FROM AUTHOR]

Deep learning models have made great accomplishments in space weather forecasting. The critical frequency of the ionospheric F2 layer (foF2) is a key ionospheric parameter, which can be understood and predicted by some advanced new deep learning technologies. In this paper, we utilized an Informer architecture model to predict foF2 for several hours up to 48 h and analyzed its variations during periods of quiet, moderate, and intense geomagnetic conditions. The Informer method forecasts the temporal variations of foF2 by processing and training the past and present foF2 data from the Haikou station, China, during 2006-2014. It is evident that the Informer-foF2 model achieves better prediction performance than the widely used long short-term memory model. The Informer-foF2 model captures the correlation features within the foF2 time series and better predicts the variations ranging for hours up to days during different geomagnetic activities. [ABSTRACT FROM AUTHOR]

This paper presents an experimental study on the pullout behaviour of inclined shallow plate anchors subjected to axial pull in sand. The 1g model tests were performed to examine the effects of anchor inclination and sand-anchor interface conditions on the load-displacement response and the associated failure and deformation mechanisms of plate anchors at various embedment ratios and sand densities. The anchor pullout capacity was found to increase continuously with the load inclination angle to the vertical ([alpha]), and the increase was more significant for a from 45[degrees] to 90[degrees]. The effect of sand-anchor interface conditions was negligible for horizontal plate anchors ([alpha] = 0[degrees]), but it became increasingly significant at larger inclination angles. The effects of these two factors both decreased with an increasing embedment ratio. Their influences on the failure and deformation mechanisms were measured and analysed using a digital image correlation (DIC) technique. Based on the test data and results available in the literature, a simple empirical method for the prediction of pullout resistance of inclined plate anchors in sand is calibrated and recommended. Key words: inclined anchor, pullout capacity, failure mechanism, model tests, sand. Cet article presente une etude experimental sur le comportement a l'arrachement d'ancrages a plaques inclinees peu profondes soumis a une traction axiale dans du sable. Les essais sur modele 1g ont ete realises pour examiner les effets de l'inclinaison de l'ancrage et des conditions de l'interface sable-ancrage sur la reponse charge-deplacement et les mecanismes associes de defaillance et de deformation des ancrages a plaque a differents rapports d'encastrement et densites de sable. On a constate que la capacite d'arrachement de l'ancrage augmentait continuellement avec l'angle d'inclinaison de la charge par rapport a la verticale (a), et que l'augmentation etait plus significative pour les angles a de 45[degrees] a 90[degrees]. L'effet des conditions d'interface entre le sable et l'ancre etait negligeable pour les ancres a plaques horizontales ([alpha] = 0[degrees]), mais il devient de plus en plus significatif pour des angles d'inclinaison plus importants. Les effets de ces deux facteurs diminuent avec l'augmentation du taux d'encastrement. Leurs influences sur les mecanismes de rupture et de deformation ont ete mesurees et analysees a l'aide d'une technique de correlation d'images numeriques (DIC). D'apres les donnees d'essai et les resultats disponibles dans la documentation, une methode empirique simple pour la prediction de la resistance a l'arrachement des ancrages a plaques inclinees dans le sable est calibree et recommandee. [Traduit par la Redaction] Mots-cles: ancrage incline, capacite d'arrachement, mecanisme de rupture, essais sur modele, sable., Introduction Plate anchors are often used to provide pullout forces for various onshore and offshore structures such as retaining walls, bridge abutments, sheet piles, transmission towers, and mooring systems. The [...]

Plate heat exchangers are always employed in the secondary heat exchange station of heat - supply network. If corrosion perforation took place on stainless steel heat exchange plate during its service, it might not only contaminate the circulating water in primary side, but also disturb the steady running of heat exchangers, or even affecting the heat - supply to resident. Thus, investigating the critical conditions for pitting corrosion of heat exchange plate in this case was instructional for establishing the water quality criterion and preventing pitting corrosion. In order to clarify this issue, material chemical analysis, XRD, SEM and electrochemical tests were conducted. Results indicated that the critical concentrations of Cl- for pitting corrosion of 304 stainless steel and 316L stainless steel under 65 ℃ were 125 mg/L and 230 mg/L, respectively. Once the scale layer was formed on the stainless steel surface, local acidification would occur on the surface, and the stainless steel was more prone to pitting corrosion at this time. In order to prevent pitting corrosion of stainless steel heat exchange plate during operation, the concentration of chloride ions in circulating water should be controlled strictly, and meanwhile the methods to prevent scale and reduce the amount of corrosion products in the surface of hear exchange plate should be taken as well.

The adsorption behavior of cadmium ion (Cd (II)) on the surface of nonmetallic, metal-doped, and amino adsorbed (TiO2)3 clusters was studied by first principles of density functional theory. It has been found that only physical adsorption exists between Cd ions and (TiO2)3 clusters, while metal doping and amino adsorption can improve the adsorption performance between Cd ions and (TiO2)3 clusters, resulting in stable chemisorption between Cd ions and doped (TiO2)3 clusters (A-3 ~ A-6). Among the three adsorption systems of nonmetal, metal-doped and amino adsorption, the adsorption energy calculation showed that metal-doped (TiO2)3 clusters had the best adsorption effect on Cd ions. Charge transfer analysis showed that Cd ions transferred a large amount of charge to metal-doped (TiO2)3 clusters, confirming that stable chemisorbed was formed between Cd ions and metal-doped (TiO2)3 clusters. After Cd ion adsorbed on the surface of metal-doped (TiO2)3 clusters, the state density of ds orbital of Cd ion overlaps effectively with that of d orbital of metal atom. Frontier orbital analysis also proved that the energy gap of metal-doped (TiO2)3 clusters decreased significantly and the conductivity increased after the adsorption of Cd ion. Therefore, metal-doped (TiO2)3 clusters can be used as sensing materials to detect Cd ions. [ABSTRACT FROM AUTHOR]

Several factors such as excessive usage of social media, quality of academic activities, family and social association, and a rapidly changing and challenging environment can negatively impact the academic performance of students. The present study aims to determine students' academic performance in higher education institutions in China, considering the role of communication styles, e-learning environment, student satisfaction, and a moderating effect of institutional support in predicting students' academic performance. Adopting a quantitative research design with sample random sampling technique, this study collected data through a validated questionnaire from a sample of 385 students from Chinese universities. Smart-PLS-4 was used for data analysis. The relationships between communication style and academic performance, e-learning and academic performance, and student satisfaction and academic performance were found to be significant. However, institutional support moderated the relationship between student satisfaction and academic performance, but no moderation effect was reported between communication style, e-learning, and academic performance. The implications of the study and future research avenues are given at the end of the paper. [ABSTRACT FROM AUTHOR]

In this paper, we propose a low-complexity fiber nonlinearity impairments compensation scheme based on nonlinear step size and modified adaptive digital back propagation. To verify the feasibility of the proposed algorithm, we construct a simulation system of single channel 12.5 GBaud polarization division multiplexing 16-ary quadrature amplitude modulation (PDM-16QAM) optical transmission system. Comprehensive numerical simulation results demonstrate that the proposed scheme can not only search for the fiber nonlinear coefficient adaptively, but also has the characteristics of high performance and low complexity. [ABSTRACT FROM AUTHOR]