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( Qing-bo Yu ),( Qing Wang ),( Xue-xin Yan ),( Tian-liang Yang ),( Meng Yao ),( Kai Zhou ),( Xin-lei Huang ),( Jian-ping Chen ) 대한지질공학회 2019 대한지질공학회 학술발표회논문집 Vol.2019 No.2
The land subsidence poses a nonnegligible threat to production and life, especially in dredger fill area. The essence of land subsidence is soil consolidation. Better evaluation of the degree of soil consolidation presents significant progress for predicting land subsidence. In this study, SBAS-InSAR was conducted to Chenjia town, the typical dredger fill area in Chongming East Shoal, Shanghai. SAR data and precise Orbit data were collected from the ESA satellite Sentinel-1 in recent 2 years with approximately one month intervals. the relationship curve of cumulative subsidence with time is obtained after processing. On this basis, the final settlement and soil consolidation can be estimated by applying the method proposed by Professor Huang Wenxi of China. The results show that: The subsidence rate is faster than 20 mm/a; The estimated final settlement is 26.6-52.9 mm, and the corresponding consolidation degree is 54.6 % on average; Soil mass has not yet been fully consolidated and it still takes a long time to achieve stability. In conclusion, the method proposed in this study can provide a clearer understanding of the consolidation degree, and a new reference for the evaluation and prevention of land subsidence. Future research will focus on longer monitoring time to enrich and improve the method. Acknowledgements This work was financially supported by National Nature Science Foundation of China (Grant No: 41820104001, 41430642 and 41627801) and the Key Laboratory of Land Subsidence Monitoring and Prevention, Ministry of Land and Resources (Grant No. KLLSMP201801).
Qing-Qing Dong,Qiu-Tong Wang,Lei Wang,Ya-Xin Jiang,Mei-Ling Liu,Hai-Jie Hu,Yong Liu,Hao Zhou,Hong-Peng He,Tong-Cun Zhang,Xuegang Luo 한국식품과학회 2018 Food Science and Biotechnology Vol.27 No.4
Sulforaphane (SFN), a natural compound derived from cruciferous vegetables, has been proved to possess potent anti-cancer activity. SMYD3 is a histone methyltransferase which is closely related to the proliferation and migration of cancer cells. This study showed that SFN could dose-dependently induce cell cycle arrest, stimulate apoptosis, and inhibit proliferation and migration of gastric carcinoma cells. Accompanied with these anticancer effects, SMYD3 and its downstream genes, myosin regulatory light chain 9, and cysteine-rich angiogenic inducer 61, was downregulated by SFN. Furthermore, overexpression of SMYD3 via transfection could abolish the effects of SFN, suggesting that SMYD3 might be an important mediator of SFN. To the best of our knowledge, this is the first report describing the role of SMYD3 in the anti-cancer of SFN. These findings might throw light on the development of novel anti-cancer drugs and functional food using SFN-rich cruciferous vegetables.
Mechanical Effect of Pre-consolidation Pressure of Structural Behavior Soil
( Qing Wang ),( Qing-bo Yu ),( Tian-liang Yang ),( Xin-lei Huang ),( Xue-xin Yan ) 대한지질공학회 2019 대한지질공학회 학술발표회논문집 Vol.2019 No.2
Structural property of soil is a new concept studied in science and study of this issue is a new problem, which involves soil mechanical effect, mechanical variability, and engineering design. Soil such as saline soil, red soil, loess, Xiashu loess, soft soil, or solidified dredger fill, which had been studied in previous research by our research group, has high pre-consolidation pressure (Pc) and high over-consolidation ratio (OCR). Considering the needs of intensity determination in engineering design, soil structure force, structural strength and other issues of structural Soils were studied in this paper. By analyzing experimental data, affecting factors of pre-consolidation pressure (Pc) was discussed. A new cognition about pre-consolidation pressure (Pc), determination method of structural strength, and genetic mechanism of structural force were proposed in this paper. Soil mass structural behavior and the mechanical effect can be one of the important fields of soil structural quantitative research. Acknowledgements This work was financially supported by the Key Project for International (Regional) Cooperation and Communication by National Natural Science Foundation of China (Grant No. 41820104001), State Key Program of the National Natural Science Foundation of China (Grant No. 41430642), the Special Fund for Major Scientific Instruments of the National Natural Science Foundation of China (Grant No. 41627801), and the Key Laboratory of Land Subsidence Monitoring and Prevention, Ministry of Land and Resources (Grant No. KLLSMP201801).
The Application of Fractional Brownian Motion in Option Pricing
Qing-xin Zhou 보안공학연구지원센터 2015 International Journal of Multimedia and Ubiquitous Vol.10 No.1
In this text, Fractional Brown Motion theory during random process is applied to research the option pricing problem. Firstly, Fractional Brown Motion theory and actuarial pricing method of option are utilized to derive Black-Scholes formula under Fractional Brown Motion and form corresponding mathematical model to describe option pricing. Secondly, based on BYD stock, estimation model on volatility of this stock is given to analyze and calculate the stock price volatility. Finally, make instance analysis for BYD’s option. Based on market data of BYD’s stock and option, calculate the actual option price and theoretical price of BYD by Black-Scholes formula under Fractional Brown Motion. Compare the forecast price of this stock option given by model with actual price, relatively good effect is obtained, and then conclude that the model has relatively strong applicability.
The Effect of Mn/Al Substitution on the Structural Stability and Magnetic Properties of Mn₃AlC
Xin-You Wang,Ping-Zhan Si,Hui-Dong Qian,Yang Yang,Hong-Liang Ge,Jihoon Park,Xin-Qing Wang,Chul-Jin Choi 한국자기학회 2019 Journal of Magnetics Vol.24 No.1
The structural stability and magnetic properties of Mn3+xAl1-xC antiperovskite with varied Mn/Al substitution were studied systematically. Single phase Mn3+xAl1-xC alloys with antiperovskite structure were obtained in samples with x = −1/4, 0, 1/4, 1/2. An additional Mn23C₆ phase was precipitated from Mn3+xAl1-xC antiperovskite for x = 3/4 while Mn23C₆ phase was formed as major phase for x = 1. The mutual substitution of Mn and Al atoms has substantial effect on the Curie temperature and the saturation magnetization of the Mn3+xAl1-xC alloys. In comparison with the as-cast alloys, the as-annealed Mn3+xAl1-xC alloys exhibit reduced Mn/Al substitutions after high temperature homogenization, which enhances the ordering of Mn and Al atoms in the lattices. The Curie temperature of the homogenized Mn3+xAl1-xC increases with increasing Mn substitution to Al. The Mn₃AlC alloy shows the highest saturation magnetization among all samples with varied Mn/Al ratios. Most samples show zero coercivity and zero remanent magnetization. The maximum value of the magnetic entropy changes of Mn2.75Al1.25C at 285 K is 2.26 J/㎏ K in fields up to 3 T.