期刊：
International Journal of Electrochemical Science,2022年17(11) ISSN：1452-3981
通讯作者：
Xiao, M;Yu, Y
作者机构：
[Xiao, Min] Changsha Univ Sci & Technol, Sch Architecture, Changsha 410076, Peoples R China.;[Yu, Y; Yu, Yi] Tianjin Univ, Sch Mat Sci & Engn, Tianjin 300072, Peoples R China.
通讯机构：
[Yu, Y ] T;[Xiao, M ] C;Changsha Univ Sci & Technol, Sch Architecture, Changsha 410076, Peoples R China.;Tianjin Univ, Sch Mat Sci & Engn, Tianjin 300072, Peoples R China.
关键词：
Superconductivity;LaOBiS2;Se doping;Fe doping;Solid state reaction method;Electrochemical corrosion
摘要：
This study was conducted to successfully synthesize LaOBiS2, F-doped LaOBiS2, Se-doped LaOBiS2, and F and Se-codoped LaOBiS2 by the standard solid state reaction route, and study the structural, superconductivity, and electrochemical corrosion properties. The layered nature of the pure and doped LaOBiS2 samples' crystals and their growth along the c-axis were revealed by structural investigations. Results revealed that Fe and Se doping caused expansion along the c-axis, respectively, confirming the effectiveness of the doping method. Studies on the relationship between resistance and temperature revealed a rapid superconducting transition for the F-doped LaOBiS2 system with a Tc of 3.18 K, and F-ion substitution can increase the superconductivity. The results demonstrated that Se substitution could be the cause of the elevated carrier mobility by successfully suppressing local distortion. Results showed that F and Se doping increased the density of electron carriers. The temperature dependence of the ZFC and FC DC magnetic susceptibilities was studied, and the results revealed that the higher Tc of the F and Se-codoped LaOBiS2 led to a diamagnetic transition into the superconducting state at Tc similar to 3.8 K. According to electrochemical corrosion investigations, F and Se codoped LaOBiS2 had a higher charge transfer resistance than other electrodes, showing a synergistic effect of F and Se on enhancing corrosion resistance.
通讯机构：
[Simian Liu; Jiaqi Shi] H;Health Building Research Center, Central South University, Changsha 410075, China<&wdkj&>College of Architecture, Changsha University of Science & Technology, Changsha 410114, China<&wdkj&>Authors to whom correspondence should be addressed.<&wdkj&>School of Architecture and Art, Central South University, Changsha 410075, China<&wdkj&>Health Building Research Center, Central South University, Changsha 410075, China<&wdkj&>Authors to whom correspondence should be addressed.<&wdkj&>School of Architecture and Art, Central South University, Changsha 410075, China
关键词：
sustainability;conservation;historic heritage of wind and rain bridges;fire risk assessment;mitigation strategies
摘要：
The Dong wind and rain bridges in western Hunan are among the most extraordinary historical buildings that express the unique culture of the Dong people, and are an unparalleled display of history, culture, aesthetics and architectural skills, but they are exposed to various disasters. However, fire poses a serious challenge to historical wind and rain bridges. This study investigated the fire risk of wind and rain bridges in terms of building materials, structural forms, fire habits, and fire loads. Fire dynamics simulator software and SketchUp modeling software were used to visualize and numerically simulate fire conditions. The survey results indicated that the fire load of the Huilong bridge was 1,794,561 MJ. After a fire, the central pavilion underwent a flashover at 200 s. By 600 s, the maximum temperature of the bridge was 1200 degrees C, and the entire bridge was in flashover condition. Furthermore, targeted fire-mitigation strategies were proposed according to the architectural characteristics and cultural environment of the wind and rain bridges in terms of the following four components: automatic fire-extinguishing equipment, fireproof coatings, suspended ceiling, and skylights. The effectiveness of the fire-resistance performance of the strategies was also evaluated. The fireproof coating measures were the most effective, and the bridge sections delayed reaching the flashover state by 40-80 s. The reported results can help reduce the fire-related risks of wind and rain bridges and protect our historical heritage more effectively and efficiently. Furthermore, this study can serve as a reference for other historic wooden structures to develop appropriate mitigation strategies.
摘要：
The coexistence of different cultures is a distinctive feature of human society, and globalization makes the construction of cities gradually tend to be the same, so how to find the unique memes of urban culture in a multicultural environment is very important for the development of a city. Most of the previous analyses of urban style have been based on simple classification tasks to obtain the visual elements of cities, lacking in considering the most essential visual elements of cities as a whole. Therefore, based on the image data of ten representative cities around the world, we extract the visual memes via the dictionary learning method, quantify the symmetric similarities and differences between cities by using the memetic similarity, and interpret the reasons for the similarities and differences between cities by using the memetic similarity and sparse representation. The experimental results show that the visual memes have certain limitations among different cities, i.e., the elements composing the urban style are very similar, and the linear combinations of visual memes vary widely as the reason for the differences in the urban style among cities.
摘要：
Surmounting complexities in analyzing the mechanical parameters of concrete entails selecting an appropriate methodology. This study integrates a novel metaheuristic technique, namely satin bowerbird optimizer (SBO) with artificial neural network (ANN) for predicting uniaxial compressive strength (UCS) of concrete. For this purpose, the created hybrid is trained and tested using a relatively large dataset collected from the published literature. Three other new algorithms, namely Henry gas solubility optimization (HGSO), sunflower optimization (SFO), and vortex search algorithm (VSA) are also used as benchmarks. After attaining a proper population size for all algorithms, the Utilizing various accuracy indicators, it was shown that the proposed ANN-SBO not only can excellently analyze the UCS behavior, but also outperforms all three benchmark hybrids (i.e., ANN-HGSO, ANN-SFO, and ANN-VSA). In the prediction phase, the correlation indices of 0.87394, 0.87936, 0.95329, and 0.95663, as well as mean absolute percentage errors of 15.9719, 15.3845, 9.4970, and 8.0629%, calculated for the ANN-HGSO, ANN-SFO, ANN-VSA, and ANN-SBO, respectively, manifested the best prediction performance for the proposed model. Also, the ANN-VSA achieved reliable results as well. In short, the ANN-SBO can be used by engineers as an efficient non-destructive method for predicting the UCS of concrete.
期刊：
Journal of Energy Storage,2022年55:105842 ISSN：2352-152X
通讯作者：
Min Xiao<&wdkj&>Ghassan Fadhil Smaisim
作者机构：
[Xiao, Min] Changsha Univ Sci & Technol, Sch Architecture, Changsha 410076, Peoples R China.;[Smaisim, Ghassan Fadhil] Univ Kufa, Fac Engn, Dept Mech Engn, Kufa, Iraq.;[Smaisim, Ghassan Fadhil] Univ Kufa, Fac Engn, Nanotechnol & Adv Mat Res Unit NAMRU, Kufa, Iraq.
通讯机构：
[Min Xiao] S;[Ghassan Fadhil Smaisim] D;Department of Mechanical Engineering, Faculty of Engineering, University of Kufa, Iraq<&wdkj&>Nanotechnology and Advanced Materials Research Unit (NAMRU), Faculty of Engineering, University of Kufa, Iraq<&wdkj&>School of Architecture, Changsha University of Science and Technology, Changsha 410076, China
摘要：
Nowadays, the emission of CO 2 has become a serious issue around the globe, upon which the Earth's temper-ature has dramatically risen. In this concern, a multi-energy CHP-based microgrid (MG) is considered to meet the multi-energy energy smart cities. As many generation units emit carbon dioxide, a power-to-gas (P2G) facility is considered in this paper to capture CO 2 emissions, upon which the environmental and economic perspectives of the system can be developed. The captured carbon dioxide can be used inside the CHP-based MG or sold to the natural gas network. Additionally, the presence of uncertainties in the loads, renewable energy resources (wind and PV), and electricity market potentially affect the flexibility and optimal function of the system, for which the joint chance constraint (JCC) approach as a scenario-based optimization method is applied for assessment of uncertain parameters. Based on the results, using the P2G facility can increase nearly 10 % of operation costs, while the emission is reduced by 50 %. Also, the applied JCC approach leads to reach the increased cost by 25 %, which shown the conservativeness behavior of the system's operator.
