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The Investigation of Function of Mineral Mud for the Skin
Yijie Du,Xiaofeng Deng,Li Li,Yinmao Dong 한국피부과학연구원 2016 아시안뷰티화장품학술지 Vol.14 No.1
목적: 본 연구는 미네랄머드가 류머티스성 질환, 건선 등 질병에 민간적 응용과 임상적 응용으로 많이 사용됨에 따 라 미네랄머드의 피부 임상응용을 목적으로 연구를 진행하였다. 방법: 미네랄머드의 소염, 항산화 작용을 요약하고, 미네랄머드를 화장품에 응용함에 있어서 존재하는 문제를 발 견하고 화장품영역에서의 발전방향을 제시하였다. 결과: 류머티스성 질환, 건선 등 난치 성 피부병의 치료는 미네랄머드의 소염, 항산화작용에 의한 것으로 보인다. 결론: 미네랄머드가 화장품 소재로서의 희망적인 가능성을 가지고 있지만 화장품 완제품으로 개발하기 위해서는 아직도 해결해야 할 여러 문제점들이 있다고 사료된다. Purpose: The treatment of mineral mud in rheumatic disease, psoriasis and other disease has been widely recognized in clinic application. We aim to explore the effect of mineral mud on the skin through it clinic application. Methods: We summarize the function of mineral mud in anti-inflammation, anti-oxidation, et al and point out the existing in the application of mineral mud in cosmetics and its development status. Results: Mineral mud have positive effects on rheumatic diseases through its properties of anti-inflammatory and anti-oxidation. Conclusion: The results demonstrate that mineral mud had a good prospect in cosmetics, but there are still many problems to be solved.
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( Yijie Sun ),( Suqian Cao ),( Hongdou Du ),( Hongzhong Xu ),( Zheng Quan ),( Bin Shi ) 대한지질공학회 2019 대한지질공학회 학술발표회논문집 Vol.2019 No.2
The smart geogrids installed with distributed fiber sensors can be used to both reinforce and monitor the stability of geogrid-reinforced slopes. In this paper, a geogrid-reinforced sand slope model was conducted in the laboratory. The fully distributed optical frequency domain reflectometry (OFDR) sensing technology was employed to measure the strain distribution of the geogrid embedded inside the model slope. Afterward, the surcharge loading was applied on the slope crest and the distributed fiber optic sensing data were collected under different stages. The monitoring results show that the fiber optical sensors can capture the progressive deformation of the geogrid-reinforced slope. Based on the model test, the performance of the reinforced soil slope is simulated by finite element software Plaxis2D as well. The strength reduction method was used to analyze the stability of the slope. An empirical relationship between the geogrid strain and the factor of safety was set up. The results indicate that the measured strain and calculated results agree very well. The strain of geogrid monitored by distribute optical fiber sensor can be used to evaluate the stability of geogrid-reinforced sand slopes.
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Zhu Yifan,Xu Feng Xiang,Guan Yijie,Zou Zhen,Duan Libin,Du Zhanpeng,Ma Hongfeng 한국자동차공학회 2023 International journal of automotive technology Vol.24 No.5
As an alternative to the conventional concave hexagonal honeycomb structure (CHHS), a negative Poisson’s ratio honeycomb structure with power function curve (NHPC) was devised. The relationship between the power function exponent (PFE) and normalized power function coefficient (NPFC) of honeycomb structure and its equivalent Poisson’s ratio (EPR) was explored to identify the range of variables required for the negative Poisson’s ratio effect. To investigate the in-plane mechanical properties and energy absorption characteristics of NHPC, the deformation mode, dynamic response, and energy absorption characteristics under various impact velocities were studied by constructing an in-plane impact simulation model. The results showed that NHPC obviously exhibited a negative Poisson’s ratio effect on medium and low impact velocities, and the deformation was primarily uniform. As the NPFC increased, the honeycomb structure was less prone to stress concentration, while the peak crushing force (PCF) and the specific energy absorption (SEA) declined and the plateau stress increased. A multi-objective optimization experiment was operated with low PCF and high SEA as the targets within the range of design variables in order to generate the optimal NHPC. According to the experimental findings, the improved NHPC showed a 25.48 % reduction in PCF and a 19.29 % increase in SEA. This paper provides theoretical recommendations for improving the energy absorption and structural optimization of the honeycomb structure.
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