4篇
您的检索式：作者名="ZHAO Junhai"
|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Seismic behavior of ring beam joints between concrete - filled twin steel tubes columns and reinforced concrete beams 显示文摘 | ZHANG Yufen ZHAO Junhai CAI C S | 2012 | Engineering Structures2012，39，： | 1 |
| 2 | Ionospheric disturbances following the March 2015 geomagnetic storm from GPS observations in China显示文摘When strong solar activities and geomagnetic storms happen, satellite communications and navigation system will be strongly disturbed. It is of great significance to monitor ionospheric disturbances,because empirical models cannot capture ionospheric anomalous disturbances well. Nowadays, dualfrequency GPS(Global Positioning System) observations can be used to estimate the ionospheric total electron content, correct the ionospheric delay and analyze the response of the ionosphere to geomagnetic storms. In this paper, the ionospheric response to the geomagnetic storm occurred in March 2015 is investigated using GPS observations provided by Crustal Movement of Observation Network of China. The result shows that this storm increases the electron density in the ionosphere quickly and disrupts the structure of the northern equatorial anomaly region at the beginning. In the main process stage, compared with that in the quite periods, the VTEC(Vertical Total Electron Content)around the longitude of 120°E decreases by 50% and the amount of depletion is larger in the high latitude region than that in the low latitude region. We also find the height of the peak electron density in F2 layer increases during the geomagnetic storm from the electron density profiles derived from GPS occultation mission. | Wenxin Zhang Xin Zhao Shuanggen Jin Junhai Li | 2018 | Geodesy and Geodynamics2018，9，4： | 1 |
| 3 | Seismic behavior of ring beam joints between concrete- filled twin steel tubes columns and reinforced concrete beams 显示文摘 | Zhang Yufen Zhao Junhai Cai C S | 2012 | Engineering Structures2012，39，： | 1 |
| 4 | Double open mouse-like terpyridine parts based amphiphilic ionic molecules displaying strengthened chemical adsorption for anticorrosion of copper in sulfuric acid solution显示文摘In this study,the benign target double terpyridine parts based amphiphilic ionic molecules(AIMs 1,2)and the reference single terpyridine segment included AIMs(AIMs 3,4)were synthesized through a multi-step method,and the molecular structures were fully characterized.The excellent anticorrosion of the target AIMs for copper surface in H_(2)SO_(4) solution was demonstrated by the electrochemistry analysis,which was more superior over those of the reference AIMs.The standard adsorption free energy changes of the target AIMs calculated by the adsorption isotherms were lower than -40 kJ·mol^(-1),suggesting an intensified chemical adsorption on metal surface.The molecular modeling and molecular dynamic computation of the studied AIMs were performed,demonstrating that the target AIMs exhibited lower highest occupied molecular orbital-lowest unoccupied molecular orbital energy gaps and greater adsorption energies than the reference ones.The chemical adsorption of the AIMs on metal surface was revealed by various spectroscopic methods including scanning electron microscopy,atomic force microscopy,Fourier transform infrared spectroscopy,attenuated total reflection infrared spectroscopy,Raman and X-ray diffraction. | Yueting Shi Junhai Zhao Lingli Chen Hongru Li Shengtao Zhang Fang Gao | 2023 | Chinese Journal of Chemical Engineering2023，57，5： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员