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Atmospheric and Oceanic Science Letters 2024年第4期17卷 58-64页

作者： Yueqi Gao Siyu Wang Zhaolei Zhang Wenxuan Yu Shuai Wang Shengqiang Zhu Peng Wang Yan Li Yele Sun Hongliang Zhang Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention Department of Environmental Science&EngineeringFudan UniversityShanghaiChina Department of Atmospheric and Oceanic Sciences Fudan UniversityShanghaiChina Shanghai Key Laboratory of Ocean-land-atmosphere Boundary Dynamics and Climate Change ShanghaiChina IRDR ICoE on Risk Interconnectivity and Governance on Weather/Climate Extremes Impact and Public Health Fudan UniversityShanghaiChina State Key Laboratory of Atmospheric Boundary Layer physics and Atmospheric Chemistry Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijingChina institute of Eco-Chongming ShanghaiChina

自2013.起中国空气质量虽改善,但华北平原(NCP)重污染仍存在且二次污染加剧,而人们对其成因和变化了解有限.本研究利用2018-2022年数据,借助CMAQ模型探讨此污染响应.结果显示,在2018-2022年间,PM_(2.5)浓度显著下降3.%-3.%,O_(3.和NO_... 详细信息

自2013.起中国空气质量虽改善,但华北平原(NCP)重污染仍存在且二次污染加剧,而人们对其成因和变化了解有限.本研究利用2018-2022年数据,借助CMAQ模型探讨此污染响应.结果显示,在2018-2022年间,PM_(2.5)浓度显著下降3.%-3.%,O_(3.和NO_(2)的年下降速率分别为1%和0.5%SIA和SOA也显著减少,每年分别减少9%和6%PM_(2.5)主要因排放减少而下降,而O_(3.则受气象影响而波动.硫酸盐和铵下降的主因是减排,而硝酸盐对气象变化敏感排放和气象变化对SOA的总体减少同样重要,但人为SOA对排放控制敏感生物SOA易受气象变化影响.研究强调了控制人为排放对缓解NCP地区夏季二次污染的重要性.

关键词： PM_(2.5) 二次污染物人为排放气象华北平原

MOFs‑Derived Strategy and Ternary Alloys Regulation in Flower‑Like Magnetic‑Carbon Microspheres with Broadband Electromagnetic Wave Absorption

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Nano-Micro Letters 2024年第11期16卷 479-493页

作者： Mengqiu Huang Bangxin Li Yuetong Qian Lei Wang Huibin Zhang Chendi Yang Longjun Rao Gang Zhou Chongyun Liang Renchao Che Laboratory of Advanced Materials Shanghai Key Lab of Molecular Catalysis and Innovative MaterialsAcademy for Engineering&TechnologyFudan UniversityShanghai 200438People’s Republic of China Department of Chemistry Fudan UniversityShanghai 200438People’s Republic of China Materials Genome institute Shanghai UniversityShanghai 200444People’s Republic of China School of Materials Science and Engineering Shanghai Institute of TechnologyShanghai 201418People’s Republic of China College of physics Donghua UniversityShanghai 201620People’s Republic of China Zhejiang Laboratory Hangzhou 311100People’s Republic of China

Broadband electromagnetic(EM)wave absorption materials play an important role in military stealth and health ***,metal–organic frameworks(MOFs)-derived magnetic-carbon CoNiM@C(M=Cu,Zn,Fe,Mn)microspheres are fabricated,which exhibit flower-like nano–microstructure with tunable EM response *** on the MOFs-derived CoNi@C microsphere,the adjacent third element is introduced into magnetic CoNi alloy to enhance EM wave absorption *** term of broadband absorption,the order of efficient absorption bandwidth(EAB)value is Mn>Fe=Zn>Cu in the CoNiM@C ***,MOFs-derived flower-like CoNiMn@C microspheres hold outstanding broadband absorption and the EAB can reach up to 5.8 GHz(covering 12.2–18 GHz at 2.0 mm thickness).Besides,off-axis electron holography and computational simulations are applied to elucidate the inherent dielectric dissipation and magnetic *** heterointerfaces in CoNiMn@C promote the aggregation of the negative/positive charges at the contacting region,forming interfacial *** graphitized carbon layer catalyzed by the magnetic CoNiMn core offered the electron mobility path,boosting the conductive *** importantly,magnetic coupling is observed in the CoNiMn@C to strengthen the magnetic responding *** study provides a new guide to build broadband EM absorption by regulating the ternary magnetic alloy.

关键词： Magnetic-carbon microspheres MOFs derivatives Electromagnetic wave absorption Magnetic loss Broadband absorption

Zonal propagation of kinetic energy and convection in the South China Sea and Indian monsoon regions in boreal summer

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Science China Earth Sciences 2004年第12期47卷 1076-1084页

作者： CHEN Longxun 1 ,GAO Hui 2 ,HE Jinhai 2 ,TAO Shiyan 3.& JIN Zuhui 3.1.Chinese Academy of Meteorological Sciences,Beijing 100081,China 2.Nanjing institute of Meteorology,Nanjing 210044,China 3.institute of Atmospheric physics,Chinese Academy of Sciences,Beijing 100029,China 1. Chinese Academy of Meteorological Sciences 100081 Beijing China 2. Nanjing institute of Meteorology 210044 Nanjing China 3. Chinese Academy of Sciences Institute of Atmospheric Physics 100029 Beijing China

Zonal propagation of kinetic energy (KE) and convection in the South China Sea (SCS) and Indian summer monsoon areas are examined in present study. Results suggest that the SCS and Indian summer monsoon prevailed regions (5 —15°N) are dominated by the southwesterly wind, however, the disturbances of KE at 850 hPa and convection are observed mainly coming from the western Pacific Ocean (140—150°E), after passing through the SCS, and westward propagated into the Bay of Bengal (90—100°E). In the Indian summer monsoon domain, where the disturbances of KE are found mainly coming from the Arabian Sea (AS) and eastward propagated into the Bay of Bengal. Therefore, the SCS and the Indian summer mon- soon are quite different in zonal propagation of KE and convection. The SCS summer monsoon is mainly affected by the KE and convection coming from the tropical western Pacific. The Indian summer monsoon, however, can be partly influenced by the AS and the SCS summer monsoon. The analysis also suggests that the interaction region between the SCS and the Indian summer monsoon is around 90—95°E, rather than 105°E as proposed by earlier studies.

关键词： zonal propagation of KE and convection, East Asian monsoon, Indian monsoon.

Upgrade of the sextupole field for beam instability mitigation in rapid cycling synchrotron of China Spallation Neutron Source

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Radiation Detection Technology and Methods 2023年第4期7卷 550-560页

作者： Liangsheng Huang Yuwen An Changdong Deng Yuan Huang Shouyan Xu Dongguan Campus Institute of High Energy PhysicsChinese Academy of Sciences(CAS)Dongguan523803China Spallation Neutron Source Science Center Dongguan523803China Key Laboratory of Particle Acceleration physics and Technology Institute of High Energy PhysicsChinese Academy of SciencesBeijing100049China

Background The China Spallation Neutron Source incorporates a rapid cycling synchrotron(RCS)that operates by accumulating protons at 80 MeV and subsequently accelerating them to 1.6 GeV within a time span of 20 *** beam is guided to striking the tungsten target for neutron *** As a space charge dominated machine,the RCS is subject to space charge effects and momentum spread,hereby influencing the tune *** address this issue,sextupole magnets,powered by two families of DC power supply,were initially employed to decrease the absolute value of chromaticity and to control the tune *** head-tail instability has been observed during the RCS beam *** The beam tests and simulations were conducted,revealing that tuning the chromaticity proved to be an effective mitigation ***,to achieve better control over the tune spread and further suppress the instability,the DC sextupole field has been upgraded to an AC sextupole field,aiming to provide dynamic for controlling the chromaticity over an acceleration *** and conclusion Thanks to the upgraded of AC field,the instability has been fully mitigated with beam power of 100 kW and the transmission in the RCS has been improved by~2%from 96 to 98%.With help of AC sextupole at present,the beam power in the RCS is increased to 140 kW.

关键词： China spallation neutron source Rapid cycling synchrotron Sextupole field Chromaticity Head-tail instability

Massive water production from lunar ilmenite through reaction with endogenous hydrogen

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The Innovation 2024年第5期5卷 47-53,46页

作者： Xiao Chen Shiyu Yang Guoxin Chen Wei Xu Lijian Song Ao Li Hangboce Yin Weixing Xia Meng Gao Ming Li Haichen Wu Junfeng Cui Lei Zhang Lijing Miao Xiaoxue Shui Weiping Xie Peiling Ke Yongjiang Huang Jianfei Sun Bingnan Yao Min Ji Mingliang Xiang Yan Zhang Shaofan Zhao Wei Yao Zhigang Zou Mengfei Yang Weihua Wang Juntao Huo Jun-Qiang Wang Haiyang Bai Key Laboratory of Magnetic Materials and Devices Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Center of Test and Analysis Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China Qian Xuesen Laboratory of Space Technology China Academy of Space Technology(CAST)Beijing 100049China College of Engineering and Applied Science Nanjing UniversityNanjing 210093China institute of physics Chinese Academy of SciencesBeijing 100049China Songshan Lake Materials Laboratory Dongguan 523830China

Finding water resources is a crucial objective of lunar ***,both hydroxyl(OH)and natural water(H2O)have been reported to be scarce on the *** propose a potential method for obtaining water on the Moon through H2O formation via endogenous reactions in lunar regolith(LR),specifically through the reaction FeO/Fe2O3.H/Fe+*** process is demonstrated using LR samples brought back by the Chang’E-5 *** and Fe2O3.are lunar minerals containing Fe ***(H)retained in lunar minerals from the solar wind can be used to produce *** results of this study reveal that 51–76 mg of H2O can be generated from 1 g of LR after melting at temperatures above 1,200 *** amount is10,000 times the naturally occurring OH and H2O on the *** the five primary minerals in LR returned by the Chang’E-5 mission,FeTiO3.ilmenite contains the highest amount of H,owing to its unique lattice structure with sub-nanometer *** the first time,in situ heating experiments using a transmission electron microscope reveal the concurrent formation of Fe crystals and H2O *** irradiation promotes the endogenous redox reaction,which is helpful for understanding the distribution of OH on the *** findings suggest that the hydrogen retained in LR is a significant resource for obtaining H2O on the Moon,which is helpful for establishing a scientific research station on the Moon.

关键词： establishing endogenous hydrogen

Shear viscosity of aluminum studied by shock compression considering elasto-plastic effects

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Chinese physics B 2014年第9期23卷 331-334页

作者：马小娟郝斌斌马海霞刘福生 institute of high Temperature and high Pressure {3. Key Laboratory of Advanced Technologies of Materials of the Ministry of EducationSouthwest Jiaotong University

The strength always exists before the material melts. In this paper, the viscoelastic-plastic model is applied to improve the finite difference method, and the numerical solutions for the disturbance amplitude damping behavior of the sinusoidal shock front in a flyer-impact experiment are obtained. When the aluminum is shocked to 101 GPa, the effect of elasto-plasticity on the zero-amplitude point of the oscillatory damping curve is the same as that of viscosity when η= 700 Pa.s, and the real shear viscosity coefficient of the shocked aluminum is determined to be about 2800±100 Pa.s. Comparing the experiment data with the numerical results of the viscoelastic-plastic model, we find that the aluminum is close to melting at 101 GPa.

关键词： shock shear viscosity elastoplasticity

Impact response and energy absorption of metallic buffer with entangled wire mesh damper

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Defence Technology（防务技术） 2024年第5期35卷 137-150页

作者： Chao Zheng Jun Wu Mangong Zhang Xin Xue institute of Metal Rubber&Vibration Noise School of Mechanical Engineering and AutomationFuzhou UniversityFuzhou 350116China Wuhan Second Ship Design and Research institute Wuhan 430205China

An innovative metallic buffer consisting of series-connected hat-shaped entangled wire mesh damper(EWMD)and parallel springs are proposed in this work to enhance the reliability of engineering *** impact response and the energy dissipation mechanism of hat-shaped EWMD under different quasi-static compression deformations(2-7 mm)and impact heights(100-200 mm)are investigated using experimental and numerical *** results demonstrate distinct stages in the quasi-static mechanical characteristics of hat-shaped EWMD,including stiffness softening,negative stiffness,and stiffness *** loss factor gradually increases with increasing compression deformation before entering the stiffness hardening *** impact loads,the hat-shaped EWMD exhibits optimal impact energy absorption when it enters the negative stiffness stage(150 mm),resulting in the best impact isolation effect of metallic ***,the impact energy absorption significantly decreases when hat-shaped EWMD enters the stiffness hardening ***,quasi-static compression analysis after experiencing different impact loads reveals the disappearance of the negative stiffness ***,with increasing impact loads,the stiffness hardening point progressively shifts to an earlier stage.

关键词： Metallic buffer Hat-shaped EWMD Drop impact energy absorption characteristics Mechanical behavior

Hugoniot equation of state of olivine and its geodynamic implications

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Science China Earth Sciences 2016年第3期59卷 619-625页

作者： HUANG Xiao Ge YUAN Xian Hao CHEN Zu An LIU Fu Sheng BAI Wu Ming Key Laboratory of Earth and Planetary physics Institute of Geology and Geophysics Chinese Academy of Sciences institute of high Temperature and high Pressure {3. Key Laboratory of Advanced Technologies of Materials Ministry of Education of China Southwest Jiaotong University

Large olivine samples were hot-pressed synthesized for shock wave experiments. The shock wave experiments were carried out at pressure range between 11 and 42 GPa. Shock data on olivine sample yielded a linear relationship between shock wave velocity D and particle velocity u described by D=3.56(?0.13.+2.57(?0.12)u. The shock temperature is determined by an energy relationship which is approximately 790°C at pressure 28 GPa. Due to low temperature and short experimental duration, we suggest that no phase change occurred in our sample below 3. GPa and olivine persisted well beyond its equilibrium boundary in metastable phase. The densities of metastable olivine are in agreement with the results of static compression. At the depth shallower than 410 km, the densities of metastable olivine are higher than those of the PREM model, facilitating cold slab to sink into the mantle transition zone. However, in entire mantle transition zone, the shock densities are lower than those of the PREM model, hampering cold slab to flow across the "660 km" phase boundary.

关键词： Hugonite density Shock temperature Olivine Mantle transition zone

Effects of projectile parameters on the momentum transfer and projectile melting during hypervelocity impact

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Defence Technology（防务技术） 2024年第2期32卷 89-103页

作者： Wenjin Liu Qingming Zhang Renrong Long Zizheng Gong Ren Jiankang Xin Hu Siyuan Ren Qiang Wu Guangming Song State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing100081China Beijing institute of Spacecraft Environment Engineering China Academy of Space TechnologyBeijing100094China

The effects of projectile/target impedance matching and projectile shape on energy,momentum transfer and projectile melting during collisions are investigated by numerical *** comparing the computation results with the experimental results,the correctness of the calculation and the statistical method of momentum transfer coefficient is *** shapes of aluminum,copper and heavy tungsten alloy projectiles striking aluminum,basalt,and pumice target for impacts up to 10 km/s are *** influence mechanism of the shape of the projectile and projectile/target density on the momentum transfer was *** an increase in projectile density and length-diameter ratio,the energy transfer time between the projectile and targets is *** projectile decelerates slowly,resulting in a larger cratering *** energy consumed by the projectile in the excavation stage increased,resulting in lower mass-velocity of ejecta and momentum transfer *** numerical simulation results demonstrated that for different projectile/target combinations,the {3.er the wave impedance of the projectile,the {3.er the initial phase transition velocity and the smaller the mass of phase *** results can provide theoretical guidance for kinetic impactor design and material selection.

关键词： Hypervelocity impact energy partitioning Impact melting Momentum transfer

Synthesis, characterization and extended X-ray absorption fine structure of novel polynuclear copper complexes with new eighteen-membered macrocycle ligands

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Chinese Science Bulletin 1996年第12期41卷 1000-1005页

作者：杨鲁勤巨新吴瑾光 Department of Chemistry Peking University Beijing 1000871 China institute of high energy {3. Chinese Academy of Sciences Beijing 100039China

Macrocycle compounds have great importance in host-guest chemistry and moleculeidentifications. 4-acetyl-bispyrazolones are a new type of polydentate ligands. Whenthey react with diamine compounds, new compounds or complexes containing C=O andC=N groups can be obtained. These compounds can be used to study the relationship ofcoordination structure and its properties, energy transferring processes between metal

关键词： copper complex macrocycle Schiff-base pyrazolone extended X-ray absorption fine structure (EXAFS).