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- 저자 : Shichao Jiang (검색결과 3 건)
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Ruiyuan Huang,Shichao Li,Long Meng,Dong Jiang,Ping Li 한국콘크리트학회 2020 International Journal of Concrete Structures and M Vol.14 No.5
The dynamic mechanical properties of steel fiber-reinforced concrete (SFRC) under high temperature and high strain rate were studied using a split Hopkinson pressure bar (SHPB) of 74 mm in diameter. As it is difficult to achieve constant strain rate loading in SHPB experiments with high temperature and high strain rate, this paper first presents a method for determining the strain rate under non-constant strain rate loading conditions. This method is proposed to deal with experimental data under non-constant strain rate loading conditions. Then, the influences of temperature on the ultimate compressive strength, peak strain, and failure modes of SFRC under different strain rates were analyzed and the results show that SFRC has a strain rate hardening effect. This paper also points out that there is a strain rate threshold for SFRC. If the strain rate is less than the strain rate threshold, there is a temperature softening effect. Conversely, if the strain rate is greater than the strain rate threshold, there is a temperature hardening effect. Finally, the relationship between the ultimate compressive strength and fiber volume fraction, strain rate, and temperature is presented and the prediction results are consistent with the experimental data.
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Frequency Tracking of Power Grid based on Phase Difference and UKF
Wei Dong,Wei Dong,Shichao Jiang 보안공학연구지원센터 2015 International Journal of Security and Its Applicat Vol.9 No.12
For frequency tracking problem of non-stationary signals in power grid, we propose a unscented Kalman filter (UKF) and the weighted phase difference smoothing algorithm. It improved poor initial conditions sensitive situations of robustness UKF. In order to improve the accuracy of the algorithm, real-time and noise immunity, a suboptimal multiple fading factor and weighted smoothing method is added to improve UKF for frequency tracking of power signals. At last, The simulation results are given. It shows that this method has better accurate, real-time tracking of various frequency power signal and its performance is superior to similar documents tracking algorithm.
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TsMIP6 enhances the tolerance of transgenic rice to salt stress and interacts with target proteins
Linlin Sun,Guohong Yu,Xiaori Han,Shichao Xin,Xiaojing Qiang,Linlin Jiang,Shuhui Zhang,Xian-guo Cheng 한국식물학회 2015 Journal of Plant Biology Vol.58 No.5
Aquaporins (AQPs), a large family of channel proteins in plants, play an important role in regulating the balance of osmotic potential in cells. We isolated an AQP gene, TsMIP6, from the halophyte Thellungiella salsuginea and functionally characterized it in transgenic rice (Oryza sativa). This gene belongs to a subfamily of tonoplast intrinsic proteins and is localized at the plasma membrane. Real-time PCR showed that expression of TsMIP6 in shoots or roots of T. salsuginea was markedly induced by salinity, whereas its ectopic expression in ‘Kitaake’ lines of rice significantly increased plant tolerance to salt stress. Physiological data suggested that TsMIP6 is involved in regulating ion homeostasis and water channel activity in salt-stressed transgenic rice. Heterologous expression analysis indicated that TsMIP6 specifically interacts with a member of the glycoside hydrolase family 64 protein #617 in yeast cells. This suggests that the relationship between TsMIP6 and #617 has a crucial role in mediating osmotic balance in plant cells. Moreover, TsMIP6 might help to modulate the transport of some neutral molecules and may function through a pathway regulating solute equilibrium to maintain osmotic potential.
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