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您的检索式：作者名="MengHao Fu"
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| 1 | The variations of the Martian exobase altitude显示文摘The exobase is defined as the interface between the strongly collisional and the collisionless parts of an atmosphere. Although in reality the exobase is a transition region of finite depth, it is conventionally defined as the boundary above which an upwardly ejected neutral particle makes one collision at higher altitudes. Such an idealized definition is of practical use and serves as a good tracer of the overall size of an atmosphere as it expands and contracts under the influences of both external and internal sources. Knowledge of the atmospheric properties near the exobase is crucial to first-order estimates of atmospheric escape rates on terrestrial planets. Since its arrival at Mars on 21 September 2014, the Mars Atmosphere and Volatile Evolution (MAVEN) spacecraft has provided comprehensive maps of the Martian upper atmosphere under a variety of conditions. This allows, for the first time, a thorough investigation of the variations of the exobase altitude on this red planet. In this study, we use the N2 density measurements accumulated by MAVEN’s Neutral Gas and Ion Mass Spectrometer from October 2014 to November 2018 to determine the exobase altitudes for a large number of MAVEN orbits. Our analysis reveals clearly the variations of exobase altitude with local time and solar extreme ultraviolet (EUV) flux, as well as tentative evidence for the impact of global dust storms. These observations are indicative of thermal expansion of the Martian upper atmosphere, driven either externally by solar EUV energy deposition or internally by global dust storms. | MengHao Fu Jun Cui XiaoShu Wu ZhaoPeng Wu Jing Li | 2020 | Earth and Planetary Physics2020，4，1： | 2 |
| 2 | Linearized Analog Photonic Links Based on a Dual-Parallel Polarization Modulator 显示文摘 | HUANG Menghao FU Jianbin PAN Shilong | 2012 | Optics Letters(S0146-9592)2012，37，11： | 1 |
| 3 | In situ preparation of g-C_(3)N_(4)/polyaniline hybrid composites with enhanced visible-light photocatalytic performance显示文摘The graphic carbon nitride/polyaniline(g-C_(3)N_(4)/PANI)hybrid composites were successfully synthesized by a facile in situ polymerization process under ice water bath.The photocatalytic activities of the g-C_(3)N_(4)/PANI composites were evaluated by using oxytetracycline(OTC)as model pollutants.The optimal g-C_(3)N_(4)/PANI composite(5%PANI:the g-C_(3)N_(4)/PANI hybrid with 5 wt.%of PANI)showed an enhancement degradation rate of 5-fold compared to that of conventional g-C_(3)N_(4)under simulated-sunlight irradiation.In addition,the 5%PANI demonstrate significantly photocatalytic evolution H_(2)rate(163.2μmol/(g·hr))under the visible light irradiation.Furthermore,based on the results of optical performance and electrochemical testing,a possible mechanism was proposed,indicating that the incorporation of PANI into the traditional g-C_(3)N_(4)can effectively tune the electronic structures,improve the photo-generated electrons-holes separation and enhance extensive absorption of visible light.Such a g-C_(3)N_(4)/PANI hybrid nanocomposites could be envisaged to possess great potentials in practical wastewater treatment and water splitting. | Chongfei Yu Lu Tan Shujie Shen Menghao Fang Ling Yang Xinfan Fu Shuying Dong Jianhui Sun | 2021 | Journal of Environmental Sciences2021，33，6： | 1 |
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