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Exploring decision-making methods for sustainable design in commercial buildings
Aifeng Wang,Lin Xing,Khidhair Jasim Mohammed,Anas A. Salameh,Amin Jan,H. Elhosiny Ali,Islam Ezz El-Arab 국제구조공학회 2022 Steel and Composite Structures, An International J Vol.43 No.2
Hundreds of decisions are taken at various phases and with diverse stakeholders along the building design processing, including the select of alternate components, materials, systems, assemblies, and building forms. Also, sustainability in the building sector is important since this business has a big influence on the environment and contributes significantly to socioeconomic growth specifically in Commercial Building. In terms of building sustainability, environmental issues are important issues in the early design stage, in which the principles of safety of structures, probabilistic reliability and durability are involved. A new integrated-design method that permits building analysis from a multi-performance view is regarded necessary to advance the sustainability. In this scenario, the environmental methodologies and footprint schemes for determining building sustainability are investigated using only a decision-making (DM) process on the basis of sustainable triple bottom line structure, which incorporates economic efficiency, resource conserving, and design for human adaption. The framework would enable design teams to achieve an optimal balance between social, environmental, and economic challenges, altering the path of construction practitioners’ thought about the information used while appraising building projects, thereby aiding the sustainability of building industry. Finally, the technique of DM utilized in those decisions would influence the final building design, and hence the project's environmental, economic and social results.
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HONGWEI CHE,AIFENG LIU,XIAOLIANG ZHANG,HONGJIANG HE,JUNXIAN HOU,JINGBO MU 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2014 NANO Vol.9 No.7
In this paper, three-dimensional (3D) Co3O4 °ower-like microspheres have been successfully synthesized via a facile ethylene glycol (EG)-mediated solvothermal method followed by calcination. The as-prepared °ower-like precursors microspheres are formed from the assembly of 2D nanosheets in the presence of hexadecyltrimethylammonium bromide (CTAB). The °ower-like architectures of the prepared precursors could be tailored by changing the amount of CTAB. Furthermore, when evaluated as a gas sensor, the obtained Co3O4 °ower-like microspheres exhibit a good response and sensitivity toward ethanol gas, suggesting their promising potential for gas sensors application.
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HONGWEI CHE,AIFENG LIU,JINGBO MU,XIAOLIANG ZHANG 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2016 NANO Vol.11 No.3
In this work, novel sisal-like hollow CuO micro-flowers were synthesized via a facile solvothermal reaction followed by calcination. The flower-like shells of hollow CuO are constructed by irregular petals interweaving each other, which are composed of aggregated nanoparticles with sizes of ca. 18 nm. It was found that the flower-like morphology of the as-synthesized CuO products can be controlled via finely tuning the solvothermal reaction time. When used as catalysts for the synthesis of organosilane, the obtained hollow CuO micro-flowers exhibit better catalytic performances than the commercial CuO powders. Superior catalytic performances are due to the hollow and flower-like structures of the as-synthesized CuO products, which can promote the synthetic reaction for the organosilane, that is, the gas–solid contacting reaction occurred among the reaction gas, solid silicon powders and CuO catalysts. Our work will be helpful to design and develop the novel Cu-based nanocatalysts for the synthesis of organosilane.
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Plastic depth and load-bearing capacity of autofrettaged cylinders
Ruilin Zhu,Guolin Zhu,Aifeng Mao 대한기계학회 2016 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.30 No.6
Autofrettage technology is usually adopted to even out and reduce stresses as well as improve the load-bearing capacity of a variety of cylindrical ultra-high mechanical apparatuses. The autofrettage of cylinders is theoretically investigated based on maximum shear stress theory or the Tresca criterion to establish the general law for autofrettage theory. The equation for the optimum plastic depth for a certain load and radius ratio is derived to ensure that the equivalent stress of the total stress does not exceed the yield limit and the absolute value of the equivalent stress of the residual stress at the internal surface likewise does not exceed the yield limit. Through this equation, a set of concise equations for total stress and residual stresses are obtained. The safe and optimum load-bearing conditions for cylinders are presented. Results show that, provided the pressure contained in a cylinder is equal to the autofrettage pressure, irrespective of k j , the equivalent total stress, s e , equals the yield limit everywhere in the entire plastic zone, that is, s e is a constant. In the elastic zone, s e is always lower than the yield limit, but if k j is outside the quasi-infinite area enclosed by the curves of the sense and possible plastic depth, then either compressive yield occurs or k j is meaningless. The results based on the Mises criterion and Tresca criteria are compared.
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