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Yue Gu,Linhua Jiang,Weizhun Jin,Zhenhua Wei,Xing Liu,Mingzhi Guo,Kailun Xia,Lei Chen 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.99 No.-
In this paper, a new series of phase change materials (PCMs) composed of capric acid/ethylene-vinylacetate/graphene (CA/EVA/GR) were prepared and thermal properties were investigated using moleculardynamics simulation. The composite PCMs were characterized by Fourier transform infraredspectroscopy (FT-IR), X-ray diffraction (XRD), scanning electron microscopy (SEM), differential scanningcalorimetry (DSC) and thermal conductivity measurement. FT-IR, XRD and SEM results manifest that CAcan be successfully wrapped by EVA and GR additives, and there is no chemical reaction between CA, EVAand GR. DSC results indicate that adding GR into CA/EVA can result in composite PCMs maintain the highlatent heat, while too much GR will cause a significant reduction in latent heat. Thermal conductivityobtained from experimental tests reveal that GR can gradually enhance the thermal conductivity of CA/EVA with increasing dosage of GR. The experimental results of thermal conductivity fall close to that ofmolecular dynamics (MD) simulation at GR dosages below 1.8 wt%, but the experimental results present atrend which is contrary to MD simulation at higher GR dosages. The mean square displacement (MSD)results manifest that composite PCMs containing 1.8 wt% GR has the highest diffusion coefficient, whilehigher GR dosage will reduce the diffusion coefficient gradually.
Sicong Du,Zhenhua Fu,Hongyan Gu 한양대학교 청정에너지연구소 2023 Journal of Ceramic Processing Research Vol.24 No.6
Modernist ideology has been on the rise recently, questioning life’s patterns and treating structures as living organisms thatcan change over time while being environmentally friendly. Yet, a wide variety of innovative materials have had an impacton the future of science and technology in the building industry. The development of economically innovative nanotechnologyalso results from cement-based high ductility materials that are earthquake resistant. Although it has been suggested thatcement-based high ductility nano-earthquake resistant materials. Thus, the goal of addressing the work is to observe the constructionof cement-based high ductility nano-earthquake resistant materials and it influence on the proposal work of houseconstructions. It uses fundamental concept, a sort of gained research which considers infrastructure effects, usage patterns,to provide a thorough evaluation of cement-based high ductility nano-earthquake resistant materials.
Xiang Gao,Zhenhua Gu,Kees Koedijk 대외경제정책연구원 2020 East Asian Economic Review Vol.24 No.4
Capital inflows have a strong presence that influences destination countries’ development of institutions, which can in turn help resuscitate a stopped economy and re-attract capital that was lost during crises such as the recent public health crisis. While the previous literature emphasizes the mechanism that foreign investors press or even threaten the local government for change, this paper explores empirically whether institutional improvement can be achieved through the channel that host countries voluntarily reform institutions in anticipation of potential investments predicted by the exogenous geographical and cultural characteristics of the recipient countries. Given that countries with better institutional quality can accumulate larger FDI stocks, we still find that the need for more FDI, in contrast to FPI and debt, gives higher incentives to host countries to strategically improve their institutions before seeking capital overseas. Moreover, the predicted FDI exerts more prominent impacts on institutions on constraining elite than those involved in launching a business, enforcing contracts, and protecting properties. The results imply that a long-run plan for upgrading elite constraint institutions is crucial for a post-pandemic FDI reboot.