Due to its environmental, economic, and durability advantages, sustainable concrete has considerably increased the potential of research in recent years. This paper investigates how rubber waste affects the mechanical...
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This study analysed the failure of dissimilar metal welds(DMWs)between ferritic heat resistant steels and austenitic stainless steels and investigated its influencing factors by means of numerical simulation,microstru...
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This study analysed the failure of dissimilar metal welds(DMWs)between ferritic heat resistant steels and austenitic stainless steels and investigated its influencing factors by means of numerical simulation,microstructure characterization and mechanical property *** the long-term high-temperature service condition in practical power plant,the DMW failure mode was along the interface between nickel-based weld metal(WM)and ferritic heat resistant steel,and the failure mechanism was stress/strain concentration,microstructure degradation and oxidation coupling acting on the *** numerical simulation results show that interface stress/strain concentration was due to the differences in coefficient of thermal expansion and creep strength,and the degree of stress/strain concentration was related to service *** ferrite band formed at the WM/ferritic steel interface was prone to cracking,attracting the fracture along the *** interface crack allowed oxidation to develop along the WM/ferritic steel *** long-term service,the interface stress/strain concentration,microstructure and oxidation all evolved,which synergistically promoted interface failure of ***,only under the long-term service of low stress conditions could trigger the interface failure of ***,long-term service would reduce the mechanical strength and plasticity of DMW.
In the paper, an algorithm for field oriented controlled permanent magnet synchronous machine (PMSM) drives is carried out, which allows for isolating, detecting and estimating both the scaling gain and the offset fau...
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Waterlogging is a very common problem during the rainy season in Bangladesh, which often causes physical, social, and economic losses in both urban and rural areas. The problem is more severe, particularly in the urba...
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ISBN:
(数字)9789819938261
ISBN:
(纸本)9789819938254
Waterlogging is a very common problem during the rainy season in Bangladesh, which often causes physical, social, and economic losses in both urban and rural areas. The problem is more severe, particularly in the urban areas of the country. Khulna City Corporation (KCC), being the third-largest city of the country, is located on a low-lying area on the west bank of the Rupsha River. The city has been suffering from water logging problems due to the rapid growth of the city and urbanization, the disruption of natural drainage system, high-intensity rainfall, increased population, an unplanned urban drainage system, the siltation of nearby river beds, etc. and so on. Therefore, the aim of the current study is to explore the waterlogging situation and identify waterlogging risk zones in the KCC. At first, social, economic, and hydrological data were collected from the Bangladesh Meteorological department (BMD), the Bangladesh Bureau of Statistics (BBS), and KCC data sources. Various hydrological data such as inundation depth, drainage density, slope, etc. have been processed from the digital elevation model (DEM) through spatial analysis in the geographic information system (GIS) platform. After data collection and processing, several indicators are identified, and a criteria weight for each indicator is obtained by the analytical hierarchy process (AHP) technique. Then a fuzzy inference system (FIS) was developed in the MATLAB platform to determine the vulnerability index of three factors, such as social, economic, and hydrological. After determining the vulnerability index of three factors, a final water logging vulnerability index was determined. Finally, the waterlogging risk zones were delineated based on the index, which was interpreted by the GIS mapping. From the analysis, it is found that about 20% of the KCC area lies in the high water logging risk zone, about 42% of the KCC area is in the medium water logging risk zone, and the remaining areas cover the low
The electrochemical reduction of carbon dioxide(CO_(2))into value-added chemicals and fuels has been extensively studied as a promising strategy for mitigating environmental issues and achieving sustainable energy ***...
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The electrochemical reduction of carbon dioxide(CO_(2))into value-added chemicals and fuels has been extensively studied as a promising strategy for mitigating environmental issues and achieving sustainable energy *** efforts have been made to improve the understanding of CO_(2)reduction reaction(CO_(2)RR)mechanisms by computational and spectroscopic *** in-depth understanding of CO_(2)RR mechanism can provide the guidance and criteria for designing high-efficiency catalysts,and hence,steering CO_(2)RR to desired *** review systematically discusses the formation mechanisms and reaction pathways of various CO_(2)RR products,including C_(1)products(CO,HCOOH,and CH_(4)),C_(2)products(C_(2)H_(4),C_(2)H_(5)OH,and CH_(3)COOH),and C_(3+)products(C_(3)H_(6),C_(3)H_(7)OH,and others).The reaction pathways are elucidated by analyzing the adsorption behavior,energy barriers,and intermediate coupling steps involved in the generation of each *** emphasis is placed on the key intermediates,such as^(*)OCHO,^(*)COOH,^(*)CO,^(*)OCCOH,and^(*)CCO,which play crucial roles in determining the product *** effects of catalyst composition,morphology,and electronic structure on the adsorption and activation of these intermediates are also ***,advanced characterization techniques,including in-situ spectroscopy and isotopic labeling experiments,are highlighted for their contributions to unraveling the reaction *** review aims to provide critical insights to reveal the activity-determining para meters and underlying CO_(2)RR mechanisms,which will guide the rational design of next-generation electrocatalysts for selective CO^(2)RR towards high-value products.
The uses for fiber optics are almost endless because of its resistance to signal distortion and ability to adapt to challenging environments. Through wireless broadband, wireless technology has enabled access to the i...
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This paper proposes SecureDec, a decentralized and secure computational pipeline for the day-ahead scheduling of electricity-gas coupled systems. At the lower level, we propose SecureADMM for the decentralized optimiz...
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High-entropy oxides(HEOs)have received significant attention because of their tunable mechanical properties and wide range of functional ***,the conventional method used for sintering HEOs requires prolonged processin...
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High-entropy oxides(HEOs)have received significant attention because of their tunable mechanical properties and wide range of functional ***,the conventional method used for sintering HEOs requires prolonged processing time,which results in excessive grain growth,thereby compromising their ***,an ultrafast high-temperature sintering(UHS)strategy was adopted,and rock-salt composite(Mg_(0.2)Co_(0.2)Ni_(0.2)Cu_(0.2)Zn_(0.2))O was selected as model *** parameters were tuned to illustrate the influence of applied current and soaking time on the densification process and resulting grain ***,the electrochemical performance of UHS-synthesized microparticles as anode materials in lithium-ion batteries was *** results show that the ultrafast heating rate results in fine grains with a diameter of~6–8μm and density of 95%,which are much smaller and similar to those obtained using the conventional sintering method(25μm and 96%).Moreover,the high surface area and reactivity of the microparticles,as well as their sluggish diffusion effect and structural stability,contribute to outstanding performance with high capacity(336 mA·h/g at 1 A/g)and ultralong cyclability(1000 cycles).This novel technique offers valuable insights into the densification process of HEOs and other materials and can thus broaden their application range.
In construction projects, the simultaneous optimization of time, cost, and quality remains a paramount challenge due to their inherent trade-offs. This paper provides an innovative approach to address this challenge t...
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Metal-organic frameworks(MOFs)have favorable characteristics such as large specific surface area,high porosity,structural diversity,and pore surface modification,giving them great potential for development and attract...
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Metal-organic frameworks(MOFs)have favorable characteristics such as large specific surface area,high porosity,structural diversity,and pore surface modification,giving them great potential for development and attractive prospects in the research area of modern materials ***,unsatisfactory catalytic activity and poor electronic conductivity are the main challenges facing *** review focuses on MOF-based materials used in electrocatalysis,based on the types of catalytic reactions that have used MOF-based materials in recent years along with their applications,and also looks at some new electrocatalytic materials and their future development prospects.
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