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Metallurgical performance evaluation of space-weathered Chang’e-5 lunar soil

International Journal of Minerals,Metallurgy and Materials 2024年第6期31卷 1241-1248页

作者： Chen li Wenhui Ma Yang li Kuixian wei Center for Lunar and Planetary Sciences Institute of GeochemistryChinese Academy of SciencesGuiyang 550081China Faculty of Metallurgical and Energy Engineering Kunming University of Science and TechnologyKunming 650093China

Space metallurgy is an interdisciplinary field that combines planetary space science and metallurgical *** involves systematic and theoretical engineering technology for utilizing planetary resources in ***,space metallurgy on the Moon is challenging because the lunar surface has experienced space weathering due to the lack of atmosphere and magnetic field,making the mi-crostructure of lunar soil differ from that of minerals on the *** this study,scanning electron microscopy and transmission electron microscopy analyses were performed on Chang’e-5 powder lunar soil *** microstructural characteristics of the lunar soil may drastically change its metallurgical *** main special structure of lunar soil minerals include the nanophase iron formed by the impact of micrometeorites,the amorphous layer caused by solar wind injection,and radiation tracks modified by high-energy particle rays inside mineral *** nanophase iron presents a wide distribution,which may have a great impact on the electromagnetic prop-erties of lunar *** ions injected by solar wind may promote the hydrogen reduction *** widely distributed amorph-ous layer and impact glass can promote the melting and diffusion process of lunar ***,although high-energy events on the lun-ar surface transform the lunar soil,they also increase the chemical activity of the lunar *** is a property that earth samples and tradi-tional simulated lunar soil *** application of space metallurgy requires comprehensive consideration of the unique physical and chemical properties of lunar soil.

关键词： space metallurgy Chang’e-5 lunar soil space weathering metallurgical performance

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Auto-parametric resonance of a continuous-beam-bridge model under two-point periodic excitation:an experimental investigation and stability analysis

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Earthquake Engineering and Engineering Vibration 2024年第2期23卷 445-454页

作者： li Yuchun Shen Chao liu wei li Dong Department of Hydraulic Engineering College of Civil EngineeringTongji UniversityShanghai 200092China

The auto-parametric resonance of a continuous-beam bridge model subjected to a two-point periodic excitation is experimentally and numerically investigated in this *** auto-parametric resonance experiment of the test model is conducted to observe and measure the auto-parametric resonance of a continuous beam under a two-point excitation on *** parametric vibration equation is established for the test model using the finite-element *** auto-parametric resonance stability of the structure is analyzed by using Newmark's method and the energy-growth exponent *** effects of the phase difference of the two-point excitation on the stability boundaries of auto-parametric resonance are studied for the test *** with the experiment,the numerical instability predictions of auto-parametric resonance are consistent with the test phenomena,and the numerical stability boundaries of auto-parametric resonance agree with the experimental *** a continuous beam bridge,when the ratio of multipoint excitation frequency(applied to the columns)to natural frequency of the continuous girder is approximately equal to 2,the continuous beam may undergo a strong auto-parametric *** with the present experiment and analysis,a hypothesis of Volgograd Bridge's serpentine vibration is discussed.

关键词： auto-parametric resonance continuous beam bridge model two-point excitation experimental investigation stability analysis vibration of Volgograd Bridge

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Photocatalytic ozonation-based degradation of phenol by ZnO—TiO_(2)nanocomposites in spinning disk reactor

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Chinese Journal of Chemical Engineering 2024年第8期72卷 74-84页

作者： Xueqing Ren Jiahao niu Yan li Lei li Chao Zhang Qiang Guo Qiaoling Zhang weizhou Jiao Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering School of Chemistry and Chemical EngineeringNorth University of ChinaTaiyuan 030051China Shanxi Sanqiang New Energy Technology Co. LtdTaiyuan 030051China

Spinning disk reactor(SDR)has emerged as a novel process intensification photocatalytic reactor,and it has higher mass transfer efficiency and photon utilization for the degradation of toxic organic pollutants by advanced oxidation processes(AOPs).In this study,ZnO—TiO_(2)nanocomposites were prepared by solgel method,and coated on the disk of SDR by impregnation-pull-drying-calcination *** performance of catalyst was characterized by X-ray diffraction,scanning electron microscope,X-ray photoelectron spectroscopy,photoluminescence and ultraviolet—visible diffuse reflectance *** ozonation in SDR was used to remove phenol,and various factors on degradation effect were studied in *** results showed that the rate of degradation and mineralization reached 100%and 83.4%under UV light irradiation after 50 min,compared with photocatalysis and ozonation,the removal rate increased by 69.3%and 34.7%,and mineralization rate increased by 56.7%and 62.9%,which indicated that the coupling of photocatalysis and ozonation had a synergistic *** radical capture experiments demonstrated that the active species such as photogenerated holes(h^(+)),hydroxyl radicals(·OH),superoxide radical(·O_(2)-)were responsible for phenol degradation,and·OH played a leading role in the degradation process,while h+and·O_(2)^(-)played a non-leading role.

关键词： Spinning disk reactor Photocatalytic ozonation ZnO-TiO_(2)nanocomposites Advanced oxidation processes

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HIV encephalopathy is contributed by macrophages and microglia

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Science China(life Sciences) 2024年第4期67卷 836-838页

作者： Si-Meng liu Man li Chunhui Ma Chunying liu An Lv Qing li Yamei niu Peng Wang Bo Huang wei-Min Tong Department of Pathology China Medical UniversityShenyang 110122China Department of Pathology Institute of Basic Medical Sciences Chinese Academy of Medical SciencesSchool of Basic Medicine Peking Union Medical CollegeNeuroscience CenterChinese Academy of Medical SciencesBeijing 100005China Department of Pathology Beijing Ditan HospitalCapital Medical UniversityBeijing 100015China Molecular Pathology Research Center Chinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100730China Center For Experimental Animal Research Institute of Basic Medical SciencesChinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing 100005China Department of Immunology and National Key Laboratory of Medical Molecular Biology Institute of Basic Medical SciencesChinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing 100010China Department of Biochemistry and Molecular Biology Tongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China

Dear Editor,Acquired immunodeficiency syndrome(AIDS),characterized by a significant decrease in the number of CD4^(+)T cells,causes a defective T cell immune response,which subsequently leads to various conditional pathogenic infections and tumors(Calmy et al.,2018;Seligmann et al.,1987).Neurological disorders have been reported in 70%–80%of patients with AIDS(Saylor et al.,2016)。

关键词： encephalopathy immunodeficiency

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A HEVC Video Steganalysis Method Using the Optimality of Motion Vector Prediction

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Computers, Materials & Continua 2024年第5期79卷 2085-2103页

作者： Jun li Minqing Zhang Ke niu Yingnan Zhang Xiaoyuan Yang College of Cryptography Engineering Engineering University of the Chinese People’s Armed Police ForceXi’an710086China Key Laboratory of Network and Information Security of the Chinese People’s Armed Police Force Xi’an710086China

Among steganalysis techniques,detection against MV(motion vector)domain-based video steganography in the HEVC(High Efficiency Video Coding)standard remains a challenging *** the purpose of improving the detection performance,this paper proposes a steganalysis method that can perfectly detectMV-based steganography in ***,we define the local optimality of MVP(Motion Vector Prediction)based on the technology of AMVP(Advanced Motion Vector Prediction).Secondly,we analyze that in HEVC video,message embedding either usingMVP index orMVD(Motion Vector Difference)may destroy the above optimality of *** then,we define the optimal rate of MVP as a steganalysis ***,we conduct steganalysis detection experiments on two general datasets for three popular steganographymethods and compare the performance with four state-ofthe-art steganalysis *** experimental results demonstrate the effectiveness of the proposed feature ***,our method stands out for its practical applicability,requiring no model training and exhibiting low computational complexity,making it a viable solution for real-world scenarios.

关键词： Video steganography video steganalysis motion vector prediction motion vector difference advanced motion vector prediction local optimality

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Effect of electron beam irradiation on surface molecule and flashover voltage of epoxy composites

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High Voltage 2024年第3期9卷 528-536页

作者： Mingru li Huan niu Kai Shang Jianyu Lang Yafang Gao Bingnan li Jiuhui Zhao Zhen li Yang Feng Shengtao li State Key Laboratory of Electrical Insulation and Power Equipment Xi'an Jiaotong UniversityXi'anShaanxiChina Key Laboratory of Engineering Dielectrics and Its Application Ministry of EducationHarbin University of Science and TechnologyHarbinHeilongjiangChina

The unsatisfactory insulating properties of solid–gas interfaces seriously restrict the development of high-voltage electrical equipment and threaten their power supply ***-beam irradiation(EBI)can effectively improve the surface flashover voltage of ***,the underlying mechanism of EBI in tailoring the surface trap and improving the flashover voltage remains *** this study,the surface morphologies and chemical compositions of epoxy composites treated with EBI were *** addition,the surface wetting properties,surface charge migration pa-rameters,and surface flashover voltages were experimentally *** was found that EBI aggravated the surface morphology,changed the surface chemical components,and repressed surface charge *** a result,the contact angle was reduced from 103.7°to 78.43°,and the flashover voltage in SF6 was increased from 35.26 to 38.90 *** calculations showed that the newly generated C–O–H and C=O bonds on the surface molecules after EBI formed charge centres at the molecular electrostatic potential,which enhanced the trapping effect of the surface deep *** a result,surface charge migration was repressed,and the surface flashover voltage was *** study could promote the further development of EBI on materials modification.

关键词： composites surface beam

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Multifunctional high-performance pressure/proximity/temperature sensors enabled by hybrid resistive-supercapacitive response

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Nano Research 2024年第6期17卷 5604-5613页

作者： Huijun Kong Zhongqian Song Meichun Ding Changxiang Shao Jiahui Yu Baolei Wang weiyan li Chenwei li li niu School of Chemistry and Pharmaceutical Engineering Shandong First Medical University and Shandong Academy of Medical SciencesJinan 250117China College of Artificial Intelligence and Big Data for Medical Sciences Shandong First Medical University and Shandong Academy of Medical SciencesJinan 250117China School of Chemical Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China

The issue of sensitivity attenuation in high-pressure region has been a persistent concern for pressure-sensitive electronic *** order to tackle such trade-off between sensitivity and linear range,herein,a hybrid piezoresistive-supercapacitive(HRSC)strategy is proposed via introducing a piezoresistive porous aerogel layer between the charge collecting electrodes and iontronic films of the pressure ***,the HRSC-induced impedance regulation and supercapacitive behavior contribute to significant mitigation in sensitivity attenuation,achieving high sensitivity across wide linear range(44.58 kPa^(−1)from 0 to 3 kPa and 23.6 kPa^(−1)from 3 to 12 kPa).The HRSC pressure sensor exhibits a low detection limit of 1 Pa,fast responsiveness(~130 ms),and excellent cycling stability,allowing to detect tiny pressure of air flow,finger bending,and human ***,the HRSC sensor exhibits exceptional perception capabilities for proximity and temperature,broadening its application scenarios in prosthetic perception and electronic *** proposed HRSC strategy may boost the ongoing research on structural design of high-performance and multimodal electronic sensors.

关键词： multimodal sensor pressure sensor high sensitivity MXene/poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)(PEDOT:PSS)aerogel structural design

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Synergistic CO_(2) mineralization using coal fly ash and red mud as a composite system

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International Journal of Coal Science & Technology 2024年第3期11卷 149-158页

作者： Zhenchao Yao Yugao Wang Jun Shen Yanxia niu Jiang Feng Yang Xianyong wei School of Chemical Engineering and Technology Taiyuan University of TechnologyTaiyuanShanxi030024China Key Laboratory of Coal Processing and Efficient Utilization Ministry of EducationUniversity of Mining&Technology221116XuzhouJiangsuChina

CO_(2) mineralization plays a critical role in the storage and utilization of CO_(2).Coal fly ash(CFA)and red mud(RM)are widely utilized as CO_(2) ***,the inert calcium species in CFA limit its carbonation capacity,meanwhile the substantial Ca^(2+)releasing of RM is hindered by a covering layer of calcium *** this study,CO_(2) mineralization in a composite system of CFA and RM was investigated to enhance the carbonation *** analyzers were employed to characterize the raw materials and resulting mineralization *** results demonstrated that a synergistic effect existed in the composite system of CFA and RM,resulting in improving CO_(2) mineralization rate and *** produced calcium carbonate was ectopically attached the surface of CFA in the composite system,thus slowing down its coverage on the surface of *** phenomenon facilitated further releasing Ca^(2+)from the internal RM,thereby enhancing CO_(2) mineralization ***,the inclusion of RM significantly improved the alkalinity of the composite system,which not only promoted the dissolution of Ca^(2+)of the inert CaSO_(4)(H_(2)O)_(2) in CFA,but also accelerated CO_(2) mineralization *** investigation would be beneficial to CO_(2) mineralization using industrial solid wastes.

关键词： CO_(2)mineralization Coal fly ash Red mud Synergistic effect

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Therapeutic potentials of peptide-derived nanoformulations in atherosclerosis:present status and future directions

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International Journal of Smart and Nano Materials 2024年第3期15卷 610-651页

作者： Xue liu weijiao Wang Qiang li Hongtao niu weili Zhang Department of Cardiovascular Medicine Yantaishan HospitalYantaiChina Department of Otolaryngology Yantaishan HospitalYantaiChina Department of Geriatric Medicine Yantaishan HospitalYantaiChina

Atherosclerosis is a severe cardiovascular disease followed by the accumulation of atherosclerotic plaques within the lumen of blood vessels resulting in reduced blood flow thus initiating a series of *** therapies for atherosclerosis encounter multiple chal-lenges,especially difficulty in precisely concentrating in certain affected regions and the potential for unwanted side ***,scientists are focused on developing nanoformulations for atherosclerosis diagnosis and ***-based nanomedi-cines improve conventional therapies by offering improved structural and therapeutic stability and enabling target-specific *** inherent biocompatibility and biodegradability additionally render them desirable materials intended for in vivo *** review manu-script aims to provide an in-depth overview of peptide-based nano-medicines for atherosclerosis,focusing on targeted cells like endothelial cells,macrophages,and monocytes and their interaction with different plaque ***,the manuscript also highlights the latest progress in multimodal techniques and provides a comprehensive overview of limitations associated with their practical implementation.

关键词： Atherosclerosis anti-atherosclerotic drugs bioavailability peptide-based nanomedicines drug targeting

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Scintillation Arc from FRB 20220912A

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Science China(Physics,Mechanics & Astronomy) 2024年第1期67卷 134-142页

作者： Zi-wei Wu Robert AMain wei-wei Zhu Bing Zhang Peng Jiang Jia-Rui niu Jin-lin Han Di li Ke-Jia Lee Dong-Zi li Yuan-Pei Yang Fa-Yin Wang Rui Luo Pei Wang Chen-Hui niu Heng Xu Bo-Jun Wang wei-Yang Wang Yong-Kun Zhang Yi Feng De-Jiang Zhou Yong-Hua Xu Can-Min Deng Yu-Hao Zhu National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China Max-Planck-Institut für Radioastronomie Bonn 53121Germany Institute for Frontier in Astronomy and Astrophysics Beijing Normal UniversityBeijing 102206China Nevada Center for Astrophysics and Department of Physics and Astronomy University of NevadaLas VegasNV 89154USA CAS Key Laboratory of FAST National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China School of Astronomy University of Chinese Academy of SciencesBeijing 100049China NAOC-UKZN Computational Astrophysics Centre University of KwaZulu-NatalDurban 4000South Africa Department of Astronomy Peking UniversityBeijing 100871China Kavli Institute for Astronomy and Astrophysics Peking UniversityBeijing 100871China Cahill Center for Astronomy and Astrophysics California Institute of TechnologyPasadena 91125USA South-Western Institute For Astronomy Research Yunnan UniversityKunming 650504China School of Astronomy and Space Science Nanjing UniversityNanjing 210093China Key Laboratory of Modern Astronomy and Astrophysics(Nanjing University) Ministry of EducationNanjing 210023China CSIRO Space and Astronomy Epping 1710Australia Department of Astronomy School of Physics and Materials ScienceGuangzhou UniversityGuangzhou 510006China Research Center for Intelligent Computing Platforms Zhejiang LaboratoryHangzhou 311100China Yunnan Observatories Chinese Academy of SciencesKunming 650011China Guangxi Key Laboratory for Relativistic Astrophysics Department of PhysicsGuangxi UniversityNanning 530004China

We present the interstellar scintillation analysis of fast radio burst(FRB)20220912A during its extremely active episode in 2022using data from the Five-hundred-meter Aperture Spherical Radio Telescope(FAST).We detect a scintillation arc in the FRB’s secondary spectrum,which describes the power in terms of the scattered FRB signals’time delay and Doppler *** arc indicates that the scintillation is caused by a highly localized *** analysis favors a Milky Way origin of the ionized interstellar medium(IISM)for the localized scattering medium but cannot rule out a host galaxy *** present our method for detecting the scintillation arc,which can be applied generally to sources with irregularly spaced bursts or *** methods could help shed light on the complex interstellar environment surrounding the FRBs and in our Galaxy.

关键词： fast radio burst scintillation FRB 20220912A

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