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- 저자 : Jianbo Xin (검색결과 5 건)
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Xin Liu,Jianbo Sun 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2016 NANO Vol.11 No.9
Cu/Cu2O nanoparticles-reduced graphene oxide composites (CuGCs) have been successfully prepared by a facile solvothermal method. The combined characterizations indicate the successful formation of CuGCs. The ~3 nm Cu/Cu2O nanoparticles homogeneously in situ grow on reduced graphene oxide sheets. CuGCs-based gas sensors were investigated for detection of NO2 at room temperature. The CuGCs exhibited fast response behavior, relatively high response and could achieve a detection limit as low as 5 ppm. Furthermore, sensing mechanism and the reason for enhancing sensing performance have also been discussed.
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Characterization of Rosa chinensis CBF Genes and the Function of RcCBF6 in Cold Tolerance
Jianbo Li,Guangshun Zheng,Shaofeng Li,Zhimin Tang,Jingshuang Sun,Xuebing Xin 한국식물학회 2020 Journal of Plant Biology Vol.63 No.4
As a class of AP2 family transcription factors, C-repeat binding factor (CBF) gene family plays an important role in resisting low-temperature stress and improving cold tolerance of plants. Rosa chinensis is an important horticultural and ornamental plant, but little is known about the molecular characteristics of CBF genes in R. chinensis. In our study, six RcCBFs members were identified at R. chinensis whole genome, including one member RcCBF1 on Chromosome 1 and other five members RcCBF2-6 on Chromosome 7. The analysis of cis-acting elements indicated that there were various cis-acting elements related to stress, development, hormone, and light. The expression profiles showed that most of RcCBFs were mainly expressed in root, and the expression levels of RcCBFs were significantly induced by low-temperature stress, especially RcCBF6. To verify the function of RcCBF6, we generated its overexpressing transgenic lines in Arabidopsis thaliana. The RcCBF6-overexpressing plants exhibited higher tolerance to cold stress as evidenced by a better growth and higher antioxidative enzyme activities than the wild-type plants. Furthermore, the expression levels of some cold-response genes were up-regulated in the transgenic plants, such as KIN1, RD29A, LTP3, and GOLS3. Our study contributes to a better understanding of RcCBF gene family and provides a foundation for the further functional research of RcCBFs.
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Qin Xin,Wan Jianbo,Zhang Qi,Zhang Yongjie,Yu Huangzhong,Shi Shengwei 한국탄소학회 2023 Carbon Letters Vol.33 No.3
Graphitic carbon nitride (g-C3N4) has attracted extensive attention in energy storage due to its suitable and tunable bandgap, high chemical/thermal stability, earth abundance and environmental friendliness. However, its conductivity should be improved to work as the electrode materials in supercapacitors. In this report, we have prepared a two-dimensional composite (CN-PANI) based on g-C3N4 and polyaniline (PANI) by in-situ polymerization, which can be efficiently applied as electrode material for supercapacitors. The introduction of PANI can increase the conductivity of the electrode, and the porous structure of g-C3N4 can provide enough channels for the transport of electrolyte ions and improve the electrode stability. As a result, the obtained CN-PANI demonstrates excellent specific capacitance (234.0 F g−1 at 5 mV/s), good rate performance and high cycling stability (86.2% after 10,000 cycles at 50 mV/s), showing great potential for high-rate supercapacitors.
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Jinyun Guo,Wang Li,Xin Liu,Jianbo Wang,Xiaotao Chang,Chunmei Zhao 한국지질과학협의회 2015 Geosciences Journal Vol.19 No.4
To investigate the coupling relationship between earthquake and ionosphere perturbation, we process the global total electron contents (TECs) estimated from GPS data of IGS stations by CODE and analyze TEC anomalies before MW 8.6 Sumatra earthquake and MW 6.7 Mexico earthquake on April 11, 2012. The sliding interquartile method with the sliding window of 27 days is used to process data of SSN, F10.7 solar flux, Dst and Kp to eliminate the effects of solar activity and the geomagnetic activity. The results show that there are positive and negative TEC anomalies over epicenter on the 11th day and the 3rd day prior to the Sumatran earthquake respectively. But the decrement and increment of TEC anomalies over epicenter occurred on the 11th day and the 3rd day prior to the Mexico earthquake. The global TEC anomalies are analyzed on the 11th day and the 3rd day before these two great earthquakes, respectively. The magnitudes of TEC anomaly occurred on the 3rd day before earthquakes are larger than that occurred on the 11th day before earthquakes. This indicates the magnitude of anomaly may be related to the number of days prior to earthquake. But the magnitude of TEC anomaly near Sumatran is lower than that near Mexico, and the duration of anomalies occurred on 11th day is longer than those on 3rd day prior to earthquake, which are different from previous results. The TEC anomaly of Sumatran earthquake mainly occurs in the afternoon and night local time, but the TEC anomaly of Mexico earthquake mainly occurs in the morning local time. The TEC anomaly peak regions before these two earthquakes appeared on the south of epicenters instead of the vertical projection of the epicenter. Corresponding ionospheric anomalies are also observed in the magnetically conjugated regions. These can be guidance for the ionosphere monitoring in earthquake study.
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An Interactive Strategy of Grid and Electric Vehicles Based on Master‑Slaves Game Model
Hongbo Cheng,Tong Luo,Chen Kang,Jianbo Xin,Hua Wan,Feng Pei,Xu Tian 대한전기학회 2020 Journal of Electrical Engineering & Technology Vol.15 No.1
In order to avoid the adverse efects of the grid caused by disorder large-scale electric vehicles and improve supporting function of energy storage battery on the power grid, interaction model of electric vehicles (EVs) and the power grid is constructed according to a master-slave game method. Then, the utility functions of each participant are established, and the dynamic constraints of the batteries for EVs are established considering the travel demand of users. Then, based on the YALMIP/CPLEX solver, the optimal response strategy of the EVs can be obtained, and the genetic algorithm is used to solve the Nash equilibrium solution of the master-slaves game model. Moreover, the Monte Carlo method is employed to simulate the user travel data and the basic parameters of EVs in a certain area. Based on these data, the optimal time-of-use price in this area is ofered, and the optimal response strategy of EVs under this price is analyzed. Finally, the study of the case show that the proposed game model can make the strategies of both the EVs and the grid, which can restrict the load fuctuation of the grid and improve the beneft of EVs without afecting their travel.
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