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Nano Research 2023年第6期16卷 8411-8416页

作者： Jingguang yi Chong Yan Dan Zhou Li-zhen Fan Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology BeijingBeijing 100083China School of electrical engineering and automation Luoyang Institute of Science and TechnologyLuoyang 471023China Shanxi Research Institute for Clean Energy Tsinghua UniversityTaiyuan 030032China

All-solid-state lithium metal batteries(ASSLMBs)that incorporate solid electrolyte(SE)and lithium metal anode suggest considerable potential in addressing the security concerns and energy density limitation of conventional lithium-ion batteries(LIBs).However,the practical application of ASSLMBs is always restricted by the interfacial instability of lithium metal anode/electrolyte and inevitable lithium dendrites propagation in ***,a solvate ionic liquid is adopted to modify the interface stability of lithium metal anode/electrolyte and inhibit the growth of lithium dendrites via an in-situ formation of a robust solid electrolyte interphase(SEI)on the surface of lithium metal ***,the ASSLMBs assembled with Li_(6)PS_(5)Cl(LPSCl)electrolyte,lithium metal anode that protected by robust SEI layer,and LiNbO_(3)@NCM622 cathode exhibit high initial capacity of 126.5 mAh·g^(−1)and improved cycling stability with a capacity retention of 80.3%over 60 cycles at 0.1 *** work helps to provide a facile route for the design of robust SEI in the application of ASSLMBs.

关键词： all-solid-state lithium metal batteries solvate ionic liquid robust solid electrolyte interphase Li_(6)PS_(5)Cl(LPSCl)electrolyte

Controlling Airy-Bessel Light Bullets in an Optically Induced Potential

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Communications in Theoretical Physics 2019年第6期71卷 741-745页

作者： zhen-Kun Wu Yu-Zong gu Institute of Micro/Nano Photonic Materials and Applications School of Physics and Electronics Henan University

We investigate numerically the curious evolution of self-decelerating Airy-Bessel light bullets carrying different topological charges(TC), launched in the three-dimensional(3 D) Schr?dinger equation with an induced parabolic potential. We present their spatiotemporal profile during propagation. In our paper, the number of TC, the modulation depth, and the induced potential are considered simultaneously. The propagation properties of light bullets result from a combination of these effects. Our scheme is distinctly different from the linear light bullets in free space, in which the localized wave packets propagate in a self-consistent trapping potential.

关键词： Airy-Bessel light bullet self-decelerating optically induced potential topological charges 3D Schrodinger equation

Catalytic oxidation of ethyl acetate on Ce-Mn-O catalysts modified by La

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Rare Metals 2021年第3期40卷 547-554页

作者： yi-Jie Lao Xing-Xing Jiang Ju Huang zhen Zhang Xing-yi Wang Lab for Advanced Materials Research Institute of Industrial CatalysisSchool of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China

La/Ce_(0.5)Mn_(0.5) catalysts prepared by wetness impregnation of Ce_(_(0.5))Mn_(_(0.5)) with La(NO_(3))_(3)(aq) were used in catalytic oxidation of ethyl *** by X-ray diffractometer(XRD),H2 temperature programmed reduction(H2-TPR),X-ray photoelectron spectroscopy(XPS) and Raman shows that La/Ce_(0.5)Mn_(0.5) catalysts have fluorite-like ***_(0.5)Mn_(0.5) catalyst presents high activity with T90(the temperature needed for 90% conversion) of 200℃,where ethyl acetate is almost completely converted into CO_(2).The conversion at 195℃ maintains at 80% for at least 100 *** intermediates were mainly ethanol and acetaldehyde whose amounts are below250 × 10^(-6) and 16 × 10^(-6),*** situ FTIR indicates that the modes of dissociative adsorption of ethyl acetate are related to surface oxygen species,which affect the stability of catalysts and the selectivity for ethanol and acetaldehyde intermediates.

关键词： Ethyl acetate Catalytic combustion Ceria Lanthanum Manganese

Existence and Nonexistence of Global Positive Solutions for a Weakly Coupled P-Laplacian System

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Acta Mathematicae Applicatae Sinica 2013年第3期29卷 541-554页

作者： Xian-zhong ZENG zhen-hai LI Yong-geng gu School of Mathematics and Computing Science Hunan University of Science and Technology College of Science Guangxi University for Nationalities Department of Mathematics Hunan Normal University

In this paper, we deal with a weakly coupled evolution P-Laplacian system with inhomogeneous terms. We obtain a critical criterion concerning existence and nonexistence of its global positive solutions. Such a criterion is different from that of the weakly coupled evolution P-Laplacian system with homogeneous terms. Further, we demonstrate existence and nonexistence of its global positive solutions.

关键词： the evolution P-Laplacian system inhomogeneous terms blow-up global existence

Prevalence of late-onset hypogonadism among middle-aged and elderly males in China:results from a national survey

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Asian Journal of Andrology 2021年第2期23卷 170-177页

作者： yi-Jun Liu Xu-Bo Shen Na Yu Xue-Jun Shang yi-Qun gu Lian-Dong Zuo Cheng-Liang Xiong zhen Ye Yuan-Zhong Zhou School of Public Health Zunyi Medical UniversityZunyi 563000China Scientific Research Center The Third Affiliated Hospital of Guang Dong Medical University(Long Jiang Hospital of Shunde District Foshan City)Foshan 528318China Department of Andrology Eastern Theater General HospitalNanjing 210002China Institute of Science and Technology National Research Institute for Family PlanningBeijing 100081China guangzhou Women and Children’s Medical Center Guangzhou Medical UniversityGuangzhou 510632China Family Planning Research Institute Tongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China Department of Urology and Andrology Wuhan Tongji Reproductive Medicine HospitalWuhan 430013China

This study aimed to propose an operational definition of late-onset hypogonadism(LOH)that incorporates both clinical symptoms and serum testosterone measurements to evaluate the prevalence of LOH in aging males in China.A population-based sample of 6296 men aged 40 years-79 years old was enrolled from six representative provinces in *** total testosterone(TT),sex hormone-binding globulin(SHBG),and luteinizing hormone(LH)were measured and free testosterone(cFT)was *** Aging Males’Symptoms(AMS)scale was used to evaluate the LOH ***,5078 men were included in this *** TT levels did not decrease with age(P=0.59),and had no relationship with AMS symptoms(P=0.87 for AMS total score,P=0.74 for≥3 sexual symptoms).The cFT levels decreased significantly with age(P<0.01)and showed a negative association with the presence of≥3 sexual symptoms(P=0.03).The overall estimated prevalence of LOH was 7.8%(395/5078)if a cFT level<210 pmol l−1 combined with the presence of≥3 sexual symptoms was used as the criterion of *** them,26.1%(103/395)and 73.9%(292/395)had primary and secondary hypogonadism,*** adjustment for confounding factors,primary and secondary hypogonadism was positively related to age and *** mass index was an independent risk factor for secondary *** results suggest that the AMS total score is not an appropriate indicator for decreased testosterone,and that the cFT level is more reliable than TT for LOH *** hypogonadism is the most common form of LOH.

关键词： Aging Males'Symptoms calculated free testosterone late-onset hypogonadism middle-aged and elderly male total testosterone

Integrating BDS and GPS for precise relative orbit determination of LEO formation flying

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Chinese Journal of Aeronautics 2018年第10期31卷 2013-2022页

作者： Bin yi Defeng gu Xiao CHANG Kai SHAO College of Liberal Arts and Sciences National University of Defense Technology

Low-Earth-Orbit（LEO） formation-flying satellites have been widely applied in many kinds of space geodesy. Precise Relative Orbit Determination（PROD） is an essential prerequisite for the LEO formation-flying satellites to complete their mission in space. The contribution of the BeiDou Navigation Satellite System（BDS） to the accuracy and reliability of PROD of LEO formation-flying satellites based on a Global Positioning System（GPS） is studied using a simulation method. Firstly, when BDS is added to GPS, the mean number of visible satellites increases from9.71 to 21.58. Secondly, the results show that the 3-Dimensional（3 D） accuracy of PROD, based on BDS-only, GPS-only and BDS ＋ GPS, is 0.74 mm, 0.66 mm and 0.52 mm, respectively. When BDS co-works with GPS, the accuracy increases by 29.73%. Geostationary-Earth-Orbit（GEO） satellites and Inclined Geosynchronous-Orbit（IGSO） satellites are only distributed over the Asia-Pacific region; however, they could provide a global improvement to PROD. The difference in PROD results between the Asia-Pacific region and the non-Asia-Pacific region is not apparent. Furthermore, the value of the Ambiguity Dilution Of Precision（ADOP）, based on BDS ＋ GPS, decreases by 7.50% and 8.26%, respectively, compared with BDS-only and GPS-only. Finally, if the relative position between satellites is only a few kilometres, the effect of ephemeris errors on PROD could be ignored. However, for a several-hundred-kilometre separation of the LEO satellites, the SingleDifference（SD） ephemeris errors of GEO satellites would be on the order of centimetres. The experimental results show that when IGSO satellites and Medium-Earth-Orbit（MEO） satellites co-work with GEO satellites, the accuracy decreases by 17.02%.

关键词： Ambiguity Dilution Of Precision BeiDou Navigation Satellite System Geostationary-Earth-Orbit Global Positioning System LEO formation flying Precise Relative Orbit Determination

Generalized Dirichlet Normal Ordering in Open Bosonic Strings

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Communications in Theoretical Physics 2009年第1期51卷 110-114页

作者： CAO zhen-Bin DUAN yi-Shi Institute of Theoretical Physics Lanzhou University Lanzhou 730000 China

Generally, open string boundary conditions play a nontrivial role in string theory. For example, in the presence of an antisymmetric tensor background field, they will lead the spacetime coordinates noncommutative. In this paper, we mainly discuss how to build up a generalized Dirichlet normal ordered product of open bosonic string embedding operators that satisfies both the equations of motion and the generalized Dirichlet boundary conditions at the quantum level in the presence of an antisymmetric background field, as the generalized Neumann case has already been discussed in the literature. Further, we also give a brief check of the consistency of the theory under the newly introduced normal ordering.

关键词： boundary conditions normal ordering

A Genetic Algorithm for Simultaneous Determination of Thin Films Thermal Transport Properties and Contact Resistance

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Journal of Materials Science & Technology 2006年第3期22卷 339-341页

作者： zhengxing HUANG zhen＇an TANG Ziqiang XU Haitao DING Yuqin gu Department of Electronic Engineering Microsystem Resarch Center Dalian University of Technology Dalian 116024 China School of Mechanic Engineering Dalian University of Technology Dalian 116024 China Department of Engineering Mechanics Tsinghua University Beijing 100084 China

A genetic algorithm （GA） was studied to simultaneously determine the thermal transport properties and the contact resistance of thin films deposited on a thick substrate. A pulsed photothermal reflectance （PPR） system was employed for the measurements. The GA was used to extract the thermal properties. Measurements were performed on SiO2 thin films of different thicknesses on silicon substrate. The results show that the GA accompanied with the PPR system is useful for the simultaneous determination of thermal properties of thin films on a substrate.

关键词： Thin film Thermal transport properties Thermal contact resistance Genetic algorithm

The core dominance parameter and Fermi detection of extragalactic radio sources

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Research in Astronomy and Astrophysics 2016年第8期16卷 1-8页

作者： zhen-Kuo Liu Zhong-Zu Wu Min-Feng gu College of Science Guizhou University Key Laboratory for Research in Galaxies and Cosmology Shanghai Astronomical ObservatoryChinese Academy of Sciences

By cross-correlating an archive sample of 542 extragalactic radio sources with the Fermi-LAT Third Source Catalog （3FGL）, we have compiled a sample of 80 γ-ray sources and 462 non-Fermi sources with available core dominance parameter （RcD）, and core and extended radio luminosity; all the parameters are directly measured or derived from available data in the literature. We found that RCD has significant correlations with radio core luminosity, γ-ray luminosity and γ-ray flux; the Fermi sources have on average higher RCD than non-Fermi sources. These results indicate that the Fermi sources should be more compact, and the beaming effect should play a crucial role in the detection of γ-ray emission. Moreover, our results also show Fermi sources have systematically larger radio flux than non-Fermi sources at fixed ReD, indicating larger intrinsic radio flux in Fermi sources. These results show a strong connection between radio and γ-ray flux for the present sample and indicate that the non-Fermi sources are likely due to the low beaming effect, and/or the low intrinsic γ-ray flux. This supports a scenario that has been published in the literature： a co-spatial origin of the activity for the radio and γ-ray emission, suggesting that the origin of the seed photons for the high-energy γ-ray emission is within the jet.

关键词： BL Lacertae objects general -- galaxies active -- quasars general -- galaxies general --gamma-rays general

COP26:Progress,Challenges,and Outlook

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Advances in Atmospheric Sciences 2022年第8期39卷 1209-1216页

作者： yi WANG Yuxuan LIU Baihe gu Institutes of Science and Development Chinese Academy of SciencesBeijing 100190China School of Public Policy and Management University of Chinese Academy of SciencesBeijing 100049China

The 26th Conference of the Parties(COP26)to the United Nations Framework Convention on Climate Change(UNFCCC)was held in Glasgow a year later than scheduled,with expected outcomes achieved under a post-pandemic *** on the Issue-Actor-Mechanism Framework,this paper systematically evaluates the outcomes achieved at COP26 and analyzes the tendency of post-COP26 climate ***,with the concerted efforts of all parties,COP26 has achieved a balanced and inclusive package of outcomes and concluded six years of negotiations on the Paris *** is fair to say that COP26 is another milestone in climate governance following the implementation of the Paris ***,the Glasgow Climate Pact has cemented the consensus on a global commitment to accelerating climate action over the next decade and reached a breakthrough consensus on reducing coal,controlling methane,and halting *** the post-COP26 era,we still need to take concrete actions to implement the outcomes of the Paris Agreement and the Glasgow Climate Pact,innovate ways to speed up CO_(2) emissions reduction,and continue to strive for breakthroughs in important issues such as finance,technology,adaptation,and *** addition to avoiding the escalation of international conflicts,we need to collectively and properly handle the relationship between energy security,carbon reduction,and development and facilitate the efforts of countries to achieve their Sustainable Development Goals(SDGs),including climate-related *** will continue to maintain the existing multilateral mechanisms and processes for climate governance,unremittingly take concrete actions to address climate change,promote a domestic comprehensive green transition and global cooperation on carbon neutrality,and contribute constructively to global climate governance.

关键词： COP26 Glasgow climate change Paris Agreement climate governance