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- 저자 : Lingling Kong (검색결과 5 건)
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The nonlinear absorption of graphene oxide water solution in femtosecond regime
Lingling Ran,Zhijun Chai,Yachen Gao,Wenzhi Wu,Qing Chang,Degui Kong 한국물리학회 2016 Current Applied Physics Vol.16 No.9
The nonlinear absorption properties of graphene oxide water solution were investigated with femtosecond pulses using Z-scan and pump-probe techniques at 800 nm wavelength. The researching results indicated that the nonlinear absorption of graphene oxide water solution include three parts: twophoton absorption of bound electrons from valence band, excited state absorption of electrons from the low energy state in conduction band and the excited state absorption of electrons from the bottom of conduction band. By theoretically fitting the experimental results, we got the two-photon absorption coefficient about b ¼ 3 1014 m/W, and the two excited state absorption cross section in the order of 1020 m2 and 1021 m2 respectively. In addition, the excited state lifetime of electron on the low energy state of conduction band was obtained. The investigation indicated that graphene oxide water solution is a good nonlinear optical material.
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Dewen Kong,Lingling Wang,Feng Fan,Xudong Zhi 한국강구조학회 2017 International Journal of Steel Structures Vol.17 No.2
The friction pendulum bearing (FPB) has been widely studied as an effective dry friction sliding isolation device, due to its self-limit and self-reset capability. The refinement finite element models of FPB were applied to column supporting single-layer reticulated domes. The seismic performances of these structures with FPBs were systematically analyzed by finite element software LS-DYNA. Numerical results illustrate that the optimal friction coefficient of FPB increases with increasing earthquake intensity and the optimal range of friction coefficient locates between 0.025 and 0.15. The seismic effects of singlelayer reticulated domes with FPBs are strengthened with the increase of curvature radius, while isolation effect of FPBs has no obvious change as the curvature radius exceeds 1.5 m. Additionally, the parameter selection principles of friction pendulum bearings for column supporting single-layer reticulated domes are given by means of investigating the force of the slider of FPBs and dynamic analysis of single-layer reticulated domes with FPBs.
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Dewen Kong,Lingling Wang,Liao Wu,Yuxia Zhang 한국강구조학회 2019 International Journal of Steel Structures Vol.19 No.3
The friction pendulum bearing (FPB) has been proved to be good isolation equipment, and the friction pendulum bearings were applied to K8 single-layer reticulated domes which span was 80 m. By using the vibration reduction analysis method based on the refi ne element models of FPBs, the seismic performance of the single-layer spherical reticulated domes with FPBs was studied and the infl uence of the column height and radius of section was discussed on the seismic performance of structures under the horizontal earthquakes. The results indicate that, with the increasing of height and radius of section of the supporting column, the vibration reduction eff ect of column supporting K8 single-layer reticulated domes with FPBs is enhanced fi rst and then weakened. Under the horizontal earthquakes, the resonance phenomenon of K8 single-layer reticulated domes with column supports could be eff ectively avoided by the use of FPBs. For the cylindrical column supporting K8 single-layer reticulated domes with FPBs, compared with the corresponding hinge support structure, the vibration reduction eff ect of column support structure with FPBs which column height is 8 m is better when the column section radius is 0.50 m. However, the optimal column section radii are between 0.60 and 0.70 m when the column height is 10 m.
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Xing, Qianguo,Wu, Lingling,Tian, Liqiao,Cui, Tingwei,Li, Lin,Kong, Fanzhou,Gao, Xuelu,Wu, Mengquan Elsevier 2018 Marine pollution bulletin Vol.133 No.-
<P><B>Abstract</B></P> <P>The world's largest green tide originated from the Jiangsu Shoal of the Yellow Sea was due to fast reproduction of floating green macroalgae (<I>Ulva prolifera</I>). It brought significant impacts on marine environment and ecosystem in the Yellow Sea. In this study, we examined the expansion of green tide from the Jiangsu Shoal during the period from 29 April to 25 June 2016. Using high-resolution satellite images, we revealed a declined growth rate during the northward drifting of early-stage green tide for the first time, i.e., the green tide had higher growth rate (up to 25% per day) in the turbid waters of the Jiangsu Shoal in May and a lower growth rate (low to 3% per day) in the relatively clear waters in the middle of the western Yellow Sea in June, which suggests that water clarity might not be the key factor controlling the growth rate of the floating macroalgae in the surface waters under natural conditions. The high growth rate led to shortened time windows for controlling the green tide by employing macroalgae collecting campaigns at the initial sites of the green tide, which was no more than 14 days in the 2016 case.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Using high-resolution satellite image for detecting early-stage green tide </LI> <LI> Found changing growth rate of green tide </LI> <LI> Assessed the countermeasure of collecting floating-macroalgae at the initial sites </LI> </UL> </P>
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Xiaoling Li,Ligang Xing,Yujun Zhang,Peng Xie,Wanqi Zhu,Xiangjiao Meng,Yinxia Wang,Lingling Kong,Hanxi Zhao,Jinming Yu 한국식품영양과학회 2020 Journal of medicinal food Vol.23 No.1
Acute radiation-induced esophagitis (ARIE) is among the most serious form of toxicities associated with definitive radiotherapy or chemoradiotherapy used for treatment of patients with esophageal cancer. Our preliminary phase I and II trials of lung cancer patients who received radiotherapy indicated epigallocatechin-3-gallate (EGCG) as a promising therapeutic option against ARIE. Therefore, we conducted a prospective phase II study to validate the efficacy and safety of EGCG in the treatment of ARIE. The patients who received chemoradiotherapy or definitive radiotherapy for treatment of esophageal cancer in the Shandong Cancer Hospital and Institute in China were enrolled for the present study. EGCG (440 μM) was administered with first onset of ARIE and then at weeks after final radiotherapy. The patients were monitored every week for dysphagia, Radiation Therapy Oncology Group (RTOG) score, and esophagitis-related pain. Moreover, tumor response and the effect on survival following the treatment were also evaluated. Comparison of the RTOG score in the first, second, third, fourth, fifth, and even sixth week after EGCG prescription and the first and second week after radiotherapy with baseline indicates a significant reduction. The tumor response rate was 86.3%. The overall survival rate in 1, 2, and 3 years was found to be 74.5%, 58%, and 40.5%. Oral administration of EGCG solution seems to be feasible for treating ARIE in patients with esophageal cancer who receive radiation therapy. EGCG might be an ARIE-reliever without compromising the efficacy of radiation therapy. A randomized study with a control group is needed for further evaluation.
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