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Petroleum Science 2023年第5期20卷 3251-3263页

作者： Meng Cheng Yu-Qi liu hao Jiang jun-hao liu Chun-Ling Li Shuang-Qing Sun Song-Qing Hu School of Materials Science and Engineering China University of Petroleum(East China)Qingdao266580ShandongChina Institute of Advanced Materials China University of Petroleum(East China)Qingdao266580ShandongChina

The stimuli-responsive anticorrosion coatings have drawn great attention as a prospective corrosion protection approach due to their smart self-repairing *** contrast to passive protection mechanism based on post-corrosion microenvironmental changes,a unique active protection strategy based on nanocatalytic oxygen depletion is proposed in this work to inhibit the occurrence of *** FeeNeC catalysts with outstanding oxygen reduction reaction(ORR)activity(half-wave potential of 0.89 V)is firstly synthesized through pre-coordination with organosilane precursor to obtain homogeneously distributed active *** this catalyst is introduced into the coating matrix,uniformly distributed FeeNeC not only compensates the defects but plays a crucial role in adsorption and consumption of diffused oxygen in the *** this dual action,the penetration of corrosive medium,especially oxygen,through coating to metal substrate is greatly suppressed,resulting in effective corrosion inhibition and a significant increase in corrosion resistance of the composite coating compared to pure epoxy *** work provides a new perspective and the starting point for the design of high-performance smart coating with active anticorrosion properties.

关键词： Nanocatalytic anticorrosion Pre-constrained metal ions Single-atom FeeNeC Deoxygenation agent Smart coatings

Photon-phonon squeezing and entanglement in a cavity optomechanical system with a flying atom

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Frontiers of physics 2019年第1期14卷 93-98页

作者： jun-hao liu Yu-Bao Zhang Ya-Fei Yu Zhi-Ming Zhang Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials & Devices (SIPSE) and Guangdong Provincial Key Laboratory of Quantum Engineering & Quantum Materials South China Normal University Guangzhou 510006 China Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials & Devices (SIPSE) and Guangdong Provincial Key Laboratory of Quantum Engineering & Quantum Materials South China Normal University Guangzhou 510006 China

We study the quadrature squeezing and entanglement in a cavity optomechanical system (COMS). In our model, a flying atom sequentially passes through and interacts with the COMS and a Ramsey pulse zone, and subsequently the atomic state is detected. In this way, the photon-phonon squeezing and entanglement can be generated. The dynamic evolution of the squeezing and entanglement in the presence of losses are examined by using the master equation method.

关键词： optomechanics squeezing entanglement

Development of calcium coke for CaC2 production using calcium carbide slag and coking coal

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International Journal of Minerals,Metallurgy and Materials 2021年第1期28卷 76-87页

作者： Xu-zhong Gong jun-qiang Zhang Zhi Wang Dong Wang jun-hao liu Xiao-dong Jing Guo-yu Qian Chuan Wang Key Laboratory of Green Process and Engineering National Engineering Laboratory for Hydrometallurgical Cleaner Production TechnologyInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China Chemical Engineering School University of Chinese Academy of SciencesBeijing 100049China Innovation Academy for Green Manufacture Chinese Academy of SciencesBeijing 100190China Department of Process Metallurgy Swerim ABLulea 97125Sweden

A type of calcium coke was developed for use in the oxy-thermal process of calcium carbide *** calcium coke was prepared by the co-pyrolysis of coking coal and calcium carbide slag, which is a solid waste generated from the chlor-alkali *** characteristics of the calcium cokes under different conditions were analyzed experimentally and *** results show that the thermal strength of calcium coke increased with the increase in the coking coal proportion, and the waterproof property of calcium coke also increased with increased carbonation *** calcium coke can increase the contact area of calcium and carbon in the calcium carbide production ***, the pore structure of the calcium coke can enhance the diffusion of gas inside the furnace, thus improving the efficiency of the oxy-thermal technology.

关键词： calcium carbide slag calcium carbide production calcium coke thermal strength waterproof property

Nuclear Starburst Activity in the Seyfert 2 Galaxy NGC 2273

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Chinese Journal of Astronomy and Astrophysics 2003年第3期3卷 203-211页

作者： Qiu-Sheng Gu, Lei Shi, Shi-jun Lei, Wen-hao liu and Jie-hao Huang Department of Astronomy, Nanjing University, Nanjing 210093 qsgu@*** Department of Astronomy Nanjing University Nanjing 210093

We present spectrophotometric results of the Seyfert 2 galaxy NGC 2273. Thepresence of high-order Balmer absorption lines (H8, H9, H10) and weak equivalent widths of CaII Kλ3933, CN λ4200, G-band λ4300 and MgIb λ5173 clearly indicate recent star-forming activity inthe nuclear region. Using a simple stellar population synthesis model, we find that for the bestfit, the contributions of a power-law featureless continuum, an intermediate-age (～ 10~8 yr) and anold (> 10~9 yr) stellar population to the total light at the reference normalization wavelength are10.0%, 33.4% and 56.6%, respectively. The existence of recent starburst activity is also consistentwith its high far-infrared luminosity (log L_(FIR.)/L☉ = 9.9), its infrared color indexes[α(25,60) = ― 1.81 and α(60,100) = ― 0.79, typical values for Seyfert galaxies withcircumnuclear starburst], and its q-value (2.23, ratio of infrared to radio flux, very similar tothat of normal spirals and starburst galaxies). Byrd et al. have suggested that NGC 2273 might haveinteracted with NGC 2273B in less than 10~9 yr ago, so the starburst activity in this galaxy couldhave been triggered by tidal interaction, as indicated in recent numerical simulations.

关键词： galaxies: seyfert galaxies: starburst galaxies: stellar content

Two-layer Lagrange-based relay network topology and trajectory design for solar system explorations

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Science China(Information Sciences) 2024年第6期67卷 342-358页

作者： jun CAO Jian JIAO hao liu Rongxing LU Qinyu ZHANG Guangdong Provincial Key Laboratory of Aerospace Communication and Networking Technology Harbin Institute of Technology (Shenzhen) Faculty of Computer Science (FCS) University of New Brunswick

Exploration targeting outer planets and even the edge of the solar system is an emerging direction for the deep-space exploration in the next decades. To address this challenge, a novel two-layer Lagrangebased relay network topology is proposed in this study. Specifically, we utilize the Sun-Mars and Sun-Saturn Lagrange points(LPs) L4 and L5 to build a two-layer backbone relay network, which ensures continuous and high-efficiency communication capability for the exploration of the solar system. Furthermore, we utilize the planetary gravity assist and design the transfer trajectory of backbone relays with the help of planetary celestial body motion equations and Kepler's laws. Moreover, we conduct link budget analysis for multihop relay transmission under Gamma-Gamma distribution, shadowed Rician fading, and additive white Gaussian noise channels in several typical exploration scenarios and validate that the LP relays can effectively support future deep-space exploration missions.

关键词： deep-space communication Lagrangian points backbone relay network transfer trajectory relay selection

Nonreciprocal coupling induced entanglement enhancement in a double-cavity optomechanical system

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Chinese Physics B 2022年第9期31卷 301-306页

作者： Yuan-Yuan liu Zhi-Ming Zhang jun-hao liu Jin-Dong Wang Ya-Fei Yu Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices(School of Information and Optoelectronic Science and Engineering) South China Normal UniversityGuangzhou 510006China Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials South China Normal UniversityGuangzhou 510006China

We investigate the quantum entanglement in a double-cavity optomechanical system consisting of an optomechanical cavity and an auxiliary cavity,where the optomechanical cavity mode couples with the mechanical mode via radiation-pressure interaction,and simultaneously couples with the auxiliary cavity mode via nonreciprocal *** study the entanglement between the mechanical oscillator and the cavity modes when the two cavities are reciprocally or non-reciprocally *** logarithmic negativity E_(n)^((1))(E_(n)^((2)))is adopted to describe the entanglement degree between the mechanical mode and the optomechanical cavity mode(the auxiliary cavity mode).We find that both E_(n)^((1))and E_(n)^((2))have maximum values in the case of reciprocal *** using nonreciprocal coupling,E_(n)^((1))and E_(n)^((2))can exceed those maximum values,and a wider detuning region where the entanglement exists can be ***,the entanglement robustness with respect to the environment temperature is also effectively enhanced.

关键词： quantum entanglement double-cavity optomechanical system nonreciprocal coupling

Entangling two oscillating mirrors in an optomechanical system via a flying atom

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Chinese Physics B 2018年第7期27卷 357-361页

作者： Yu-Bao Zhang jun-hao liu Ya-Fei Yu Zhi-Ming Zhang Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices（SIPSE） Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum MaterialsSouth China Normal UniversityGuangzhou 510006China

We propose a novel scheme for generating the entanglement of two oscillating mirrors in an optomechanical system via a flying atom. In this scheme, a two-level atom, in an arbitrary superposition state, passes through an optomechanical system with two oscillating cavity-mirrors, and then its states are detected. In this way, we can generate the entangled states of the two oscillating mirrors. We derive the analytical expressions of the entangled states and make numerical calculations. We find that the entanglement of the two oscillating mirrors can be controlled by the initial state of the atom, the optomechanical coupling strength, and the coupling strength between the atom and the cavity field. We investigate the dynamics of the system with dissipations and discuss the experimental feasibility.

关键词： quantum entanglement optomechanical system dissipative dynamics

Utility of somatosensory and motor-evoked potentials in reflecting gross and fine motor functions after unilateral cervical spinal cord contusion injury

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Neural Regeneration Research 2021年第7期16卷 1323-1330页

作者： Rong Li Zu-Cheng Huang Hong-Yan Cui Zhi-Ping Huang jun-hao liu Qing-An Zhu Yong Hu Institute of Biomedical Engineering Chinese Academy of Medical Sciences and Peking Union Medical CollegeTianjinChina Department of Spine Surgery Nanfang HospitalSouthern Medical UniversityGuangzhouGuangdong ProvinceChina Department of Orthopedics and Traumatology The University of Hong KongHong Kong Special Administrative RegionChina Department of Orthopedics and Traumatology The Hong Kong University Shenzhen HospitalShenzhenGuangdong ProvinceChina

Fine motor skills are thought to rely on the integrity of ascending sensory pathways in the spinal dorsal column as well as descending motor pathways that have a neocortical ***, the neurophysiological processes underlying communication between the somatosensory and motor pathways that regulate fine motor skills during spontaneous recovery after spinal cord contusion injury remain ***, we established a rat model of cervical hemicontusive injury using C5 laminectomy followed by contusional displacement of 1.2 mm(mild injury) or 2.0 mm(severe injury) to the C5 spinal *** recordings were performed on the brachial muscles up to 12 weeks after injury to investigate the mechanisms by which spinal cord pathways participate in motor *** spinal cord contusion injury, the amplitudes of somatosensory and motor-evoked potentials were reduced, and the latencies were *** forelimb open field locomotion test, grooming test, rearing test and Montoya staircase test revealed improvement in *** increasing time after injury, the amplitudes of somatosensory and motor-evoked potentials in rats with mild spinal cord injury increased gradually, and the latencies gradually *** comparison, the recovery times of somatosensory and motor-evoked potential amplitudes and latencies were longer, and the recovery of motor function was delayed in rats with severe spinal cord *** analysis revealed that somatosensoryevoked potential and motor-evoked potential parameters were correlated with gross and fine motor function in rats with mild spinal cord contusion *** contrast, only somatosensory-evoked potential amplitude was correlated with fine motor skills in rats with severe spinal cord *** results show that changes in both somatosensory and motor-evoked potentials can reflect the changes in gross and fine motor functions after mild spinal cord contusion injury, and that the change in somatosen

关键词： central nervous system motor-evoked potential motor function regeneration repair somatosensory-evoked potential spinal cord spinal cord injury

Recent advances in vacancy engineering for reliable lithiumsulfur batteries

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Rare Metals 2024年第2期43卷 455-477页

作者： Wen-Dong liu Xiao Tang jun-An Feng Chao-Yue Zhang hao liu Chuan Shi Xiao-Xian Zhao Jian-jun Song College of Physics School of Chemistry and Chemical EngineeringQingdao UniversityQingdao266071China Faculty of Science Centre for Clean Energy TechnologySchool of Mathematical and Physical SciencesUniversity of Technology SydneySydneyNSW2007Australia Department of Chemistry College of ScienceHebei Agricultural UniversityBaoding071001China

The high-energy-density and low-cost features endow lithium-sulfur batteries with broad application ***,many drawbacks,especially the detrimental shuttle effect,have hindered the further development of *** response,a lot of new structures have been applied to suppress the shuttle effect and promote the development of ***,vacancy engineering has gained the attention of researchers due to its unique electronic *** review aims to analyze the application of vacancy engineering in ***,the electrochemistry of LSBs has been systematically discussed and the existing challenges as well as improvement tactics of LSBs have also been ***,the preparation methods and characterization technologies of various vacancies are summarized,including oxygen vacancies,sulfur vacancies,selenium vacancies,other anion vacancies,cation vacancies,*** latest applications of vacancy engineering in LSBs are also summarized in this ***,some prospects and insights for further investigation and practical application of vacancy engineering in LSBs are put forward.

关键词： Lithium-sulfur batteries(LSBs) Defects Vacancy engineering Electronic structure Shuttle effect

Optical nonreciprocity in a piezo-optomechanical system

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Chinese Physics B 2020年第7期29卷 321-325页

作者： Yu-Ming Xiao jun-hao liu Qin Wu Ya-Fei Yu Zhi-Ming Zhang Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices and School of Information and Optoelectronic Science and EngineeringSouth China Normal UniversityGuangzhou 510006China Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials South China Normal UniversityGuangzhou 510006China School of Biomedical Engineering Guangdong Medical UniversityDongguan 523808China

We theoretically study the optical nonreciprocity in a piezo-optomechanical microdisk resonator,in which the cavity modes and the mechanical mode are optically pumped and piezoelectrically driven,*** asymmetric optical pumping and different piezoelectrical drivings,our system shows some nonreciprocal optical *** find that our system can function as an optical isolator,a nonreciprocal amplifier,or a nonreciprocal phase shifter.

关键词： quantum optics cavity optomechanical system optical nonreciprocity piezoelectric force