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| 1 | Nonlinear Dynamic Analysis of Coupled Gear-Rotor-Bearing System with the Effect of Internal and External Excitations显示文摘Extensive studies on nonlinear dynamics of gear systems with internal excitation or external excitation respectively have been carried out. However, the nonlinear characteristics of gear systems under combined internal and external excitations are scarcely investigated. An eight-degree-of-freedom(8-DOF) nonlinear spur gear-rotor-bearing model, which contains backlash, transmission error, eccentricity, gravity and input/output torque, is established, and the coupled lateral-torsional vibration characteristics are studied. Based on the equations of motion, the coupled spur gear-rotor-bearing system(SGRBS) is investigated using the Runge-Kutta numerical method, and the effects of rotational speed, error fluctuation and load fluctuation on the dynamic responses are explored. The results show that a diverse range of nonlinear dynamic characteristics such as periodic motion, quasi-periodic motion, chaotic behaviors and impacts exhibited in the system are strongly attributed to the interaction between internal and external excitations. Significantly, the changing rotational speed could effectively control the vibration of the system. Vibration level increases with the increasing error fluctuation. Whereas the load fluctuation has an influence on the nonlinear dynamic characteristics and the increasing excitation force amplitude makes the vibration amplitude increase, the chaotic motion may be restricted. The proposed model and numerical results can be used for diagnosis of faults and vibration control of practical SGRBS. | ZHOU Shihua SONG Guiqiu REN Zhaohui WEN Bangchun | 2016 | Chinese Journal of Mechanical Engineering2016，29，2： | 11 |
| 2 | Multilayer black phosphorus as saturable absorber for an Er:Lu_(2)O_(3) laser at~3 μm显示文摘Multilayer black phosphorus(BP) nanoplatelets of different thicknesses were prepared by the liquid phase exfoliation method and deposited onto yttrium aluminum garnet substrates to form saturable absorbers(SAs). These were characterized with respect to their thickness-dependent saturable absorption properties at 3 μm. The BP-SAs were employed in a passively Q-switched Er:Lu_2O_3 laser at 2.84 μm. By using BP exfoliated in different solvents,stable pulses as short as 359 ns were generated at an average output power of up to 755 m W. The repetition rate in the experiment was 107 k Hz, corresponding to a pulse energy of 7.1 μJ. These results prove that BP-SAs have a great potential for optical modulation in the mid-infrared range. | Mingqi Fan Tao Li Shengzhi Zhao Guiqiu Li Xiaochun Gao Kejian Yang Dechun Li Christian Krankel | 2016 | Photonics Research2016，4，5： | 5 |
| 3 | The influence of hydrogen sulfide on corrosion of iron under different conditions显示文摘 | Houyi Ma Xiaoliang Cheng Guiqiu Li Shenhao Chen Zhenlan Quan Shiyong Zhao Lin Niu | 2000 | Corrosion Science2000，，10： | 4 |
| 4 | Gene Cloning and Molecular Characterization of a β-Glucosidase from Thermotoga Naphthophila RUK-10:an Effective Tool for Synthesis of Galacto-oligosaccharide and Alkyl Galactopyranosides显示文摘 | KONG Fansi YANG Jingwen ZHEN Zhen LIANG Tingting ZHU Dongliang GAO Renjun XIE Guiqiu | 2015 | Chemical Research in Chinese Universities2015，31，5： | 3 |
| 5 | The influence of hydrogen sulfide on corrosion of iron under different conditions显示文摘 | Houyi Ma Xiaoliang Cheng Guiqiu Li Shenhao Chen Zhenlan Quan Shiyong Zhao Lin Niu | 2000 | Corrosion Science2000，，10： | 2 |
| 6 | Effects of silver nanoparticles with different dosing regimens and exposure media on artificial ecosystem显示文摘Due to the wide use of silver nanoparticles(AgNPs) in various fields, it is crucial to explore the potential negative impacts on the aquatic environment of AgNPs entering into the environment in different ways. In this study, comparative experiments were conducted to investigate the toxicological impacts of polyvinylpyrrolidone-coated silver nanoparticles(PVP-AgNPs) with two kinds of dosing regimens, continuous and one-time pulsed dosing, in different exposure media(deionized water and XiangJiang River water). There were a number of quite different experimental results(including 100% mortality of zebrafish,decline in the activity of enzymes, and lowest number and length of adventitious roots) in the one-time pulsed dosing regimen at high PVP-AgNP concentration exposure(HOE)compared to the three other treatments. Meanwhile, we determined that the concentration of leached silver ions from PVP-AgNPs was too low to play a role in zebrafish death. Those results showed that HOE led to a range of dramatic ecosystem impacts which were more destructive than those of other treatments. Moreover, compared with the continuous dosing regimen, despite the fact that higher toxicity was observed for HOE, there was little difference in the removal of total silver from the aquatic environment for the different dosing regimens. No obvious differences in ecological impacts were observed between different water columns under low concentration exposure. Overall, this work highlighted the fact that the toxicity of Ag NPs was impacted by different dosing regimens in different exposure media, which may be helpful for assessments of ecological impacts on aquatic environments. | Jingwen Zeng Piao Xu Guiqiu Chen Guangming Zeng Anwei Chen Liang Hu Zhenzhen Huang Kai He Zhi Guo Weiwei Liu Jing Wu Jiangbo Shi | 2019 | Journal of Environmental Sciences2019，31，1： | 2 |
| 7 | TWO NEW CINNAMIC ACID DERIVATIVES FROM MAGNOLIA BIONDII PAMP显示文摘Two new cinnamic acid derivatives named biondinin C and biondinin D were isolated from the flower buds of Magnolia biondii pamp. The structures were elucidated by the spectral data including 1H, 1H COSY, 1H-13C COSY spectra. | GuiQiu HAN, Qiu Li HUANG National Laboratory of Natural and Biomimetic Drugs Beijing Medical University, Beijing 100083 | 1993 | Chinese Chemical Letters1993，4，1： | 2 |
| 8 | Application of a by-product of Lentinus edodes to the bioremediation of chromate contaminated water显示文摘 | CHEN Guiqiu ZENG Guangming TU Xiang | 2006 | Journal of Hazardous Materials2006，135，123： | 1 |
| 9 | China' s Greenhouse Gas Emissions' Dynamic Effects in the Process of its Urbanization: A Perspective from Shocks Decomposition under Long-term Constraints 显示文摘 | Dong Xiangyang Yuan Guiqiu | 2011 | Energy Procedia2011，5，： | 1 |
| 10 | The influence of hydrogen sulfide on corrosion of iron under different conditions显示文摘 | Ma Houyi Cheng Xiaoliang Li Guiqiu | 2000 | Corrosion Science2000，42，10： | 1 |
| 11 | Combining AHP with GIS in Synthetic Evaluation of Eco-environment Quality-A Case Study of Hunan Province, China显示文摘 | Xiong Ying Zeng Guangming Chen Guiqiu | 2007 | Ecologi cal Modeling2007，209，： | 1 |
| 12 | High-quality 2-μm Q-switched pulsed solid-state lasers using spin-coating-coreduction approach synthesized Bi_2Te_3 topological insulators显示文摘In this paper, the fabrication process and characterization of Bi_2Te_3 topological insulators(TIs) synthesized by the spin-coating-coreduction approach(SCCA) is reported. With this approach, high-uniformity nano-crystalline TI saturable absorbers(TISAs) with large-area uniformity and controllable thickness are prepared. By employing these prepared TIs with different thicknesses as SAs in 2-μm solid-state Q-switched lasers, thickness-dependent output powers and pulse durations of the laser pulses are obtained, and the result also exhibits stability and reliability. The shortest pulse duration is as short as 233 ns, and the corresponding clock amplitude jitter is around 2.1%, which is the shortest pulse duration in Tl SA-based Q-switched 2-μm lasers to the best of our knowledge.Moreover, in comparison with the TISA synthesized by the ultrasound-assisted liquid phase exfoliation(UALPE)method, the experimental results show that lasers with SCCA synthesized TISAs have higher output powers, shorter pulse durations, and higher pulse peak powers. Our work suggests that the SCCA synthesized TISAs could be used as potential SAs in pulsed lasers. | JUNPENG QIAO SHENGZHI ZHAO KEJIAN YANG WEI-HENG SONG WENCHAO QIAO CHUNG-LUNG WU JIA ZHAO GUIQIU LI DECHUN LI TAO LI HONG LIU CHAO-KUEI LEE | 2018 | Photonics Research2018，6，4： | 1 |
| 13 | Combining AHP with GIS in synthetic evaluation of eco-environment quality-A case study of Hunan Province显示文摘 | Ying Xiong Zeng Guangming Chen Guiqiu Tang Lin Wang Kelin Huang Daoyou | 2007 | Ecological Modelling2007，209，24： | 1 |
| 14 | Femtosecond laser fabrication of nanograting-based distributed fiber sensors for extreme environmental applications显示文摘The femtosecond laser has emerged as a powerful tool for micro-and nanoscale device fabrication. Through nonlinear ionization processes, nanometer-sized material modifications can be inscribed in transparent materials for device fabrication. This paper describes femtosecond precision inscription of nanograting in silica fiber cores to form both distributed and point fiber sensors for sensing applications in extreme environmental conditions. Through the use of scanning electron microscope imaging and laser processing optimization,high-temperature stable, Type II femtosecond laser modifications were continuously inscribed,point by point, with only an insertion loss at 1 d B m~(-1) or 0.001 d B per point sensor device.High-temperature performance of fiber sensors was tested at 1000℃, which showed a temperature fluctuation of ±5.5℃ over 5 days. The low laser-induced insertion loss in optical fibers enabled the fabrication of a 1.4 m, radiation-resilient distributed fiber sensor. The in-pile testing of the distributed fiber sensor further showed that fiber sensors can execute stable and distributed temperature measurements in extreme radiation environments. Overall, this paper demonstrates that femtosecond-laser-fabricated fiber sensors are suitable measurement devices for applications in extreme environments. | Mohan Wang Kehao Zhao Jingyu Wu Yuqi Li Yang Yang Sheng Huang Jieru Zhao Thomas Tweedle David Carpenter Guiqiu Zheng Qingxu Yu Kevin P Chen | 2021 | International Journal of Extreme Manufacturing2021，3，2： | 1 |
| 15 | Review of stopping power and Coulomb explosion for molecular ion in plasmas显示文摘We summarize our theoretical studies for stopping power of energetic heavy ion,diatomic molecular ions and small clusters penetrating through plasmas.As a relevant research field for the heavy ion inertial confinement fusion(HICF),we lay the emphasis on the dynamic po-larization and correlation effects of the constituent ion within the molecular ion and cluster for stopping power in order to disclose the role of the vicinage effect on the Coulomb explosion and energy deposition of molecules and clusters in plasma.On the other hand,as a promising scheme for ICF,both a strong laser field and an intense ion beam are used to irradiate a plasma target.So the influence of a strong laser field on stopping power is significant.We discussed a large range of laser and plasma parameters on the coulomb explosion and stopping power for correlated-ion cluster and C 60 cluster.Furthermore,in order to indicate the effects of different cluster types and sizes on the stopping power,a comparison is made for hydrogen and carbon clusters.In addition,the deflection of molecular axis for diatomic molecules during the Coulomb explosion is also given for the cases both in the presence of a laser field and laser free.Finally,a future experimental scheme is put forward to measure molecular ion stopping power in plasmas in Xi’an Jiaotong University of China. | Guiqiu Wang He Yi Yujiao Li Yaochuan Wang Dajun Liu Fei Gao Wei Liu Jieru Ren Xing Wang Yongtao Zhao Younian Wang | 2018 | Matter and Radiation at Extremes2018，3，2： | 1 |
| 16 | Low Temperature PlasmaInitiated Precipitation Copolymerization of Styrene and Maleic Anhydride显示文摘 | Da Yan Xinhua Xu Guiqiu Ma | 2012 | Journal of Applied Polymer Science2012，89，： | 1 |
| 17 | The Influence of Hydrogen Sulfide on Corrosion of Iron Under Different Condi tions 显示文摘 | Ma Houyi Cheng Xiaoliang Li Guiqiu | 2000 | Corrosion Science2000，42，10： | 1 |
| 18 | China's greenhouse gas emissions'dynamic effects in the processof its urbanization: A perspectivefrom shocks decomposition under long-term constraints 显示文摘 | Dong Xiangyang Yuan Guiqiu | 2011 | EnergyProcedia2011，，5： | 1 |
| 19 | China’s Greenhouse Gas emissions’ dynamic effects in the process of its urbanization: A perspective from shocks decomposition under long-term constraints显示文摘 | Dong Xiangyang Yuan Guiqiu | 2011 | Energy Procedia2011，，： | 1 |
| 20 | Combining AHP with GIS in synthetic evaluation of eco- environment quality: A case study of Hunan Province, China显示文摘 | Xiong Ying Zeng Guangming Chen Guiqiu | 2007 | Ecological Modeling2007，209，： | 1 |
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