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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

石墨烯/聚乙烯复合材料及其拉伸性能的分子动力学模拟

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高分子学报 2017年第4期27卷 716-726页

作者：陈生辉吕强郭继成王志坤孙霜青胡松青中国石油大学(华东)理学院山东省高校新能源物理与材料科学重点实验室(中国石油大学(华东)) 青岛266580

利用分子动力学方法,模拟石墨烯/聚乙烯复合材料的微观结构和性能,并采用单轴拉伸模拟方法研究石墨烯/聚乙烯复合材料的拉伸性能.结果表明,在石墨烯/聚乙烯复合材料平衡构型中,聚乙烯基体分子在石墨烯表面处形成多层吸附层,吸附层处于... 详细信息

利用分子动力学方法,模拟石墨烯/聚乙烯复合材料的微观结构和性能,并采用单轴拉伸模拟方法研究石墨烯/聚乙烯复合材料的拉伸性能.结果表明,在石墨烯/聚乙烯复合材料平衡构型中,聚乙烯基体分子在石墨烯表面处形成多层吸附层,吸附层处于动态稳定状态,层内分子可以发生扩散迁移.吸附层内聚乙烯分子发生"吸附固化"现象,分子弯曲程度减弱,发生有序排列,且在垂直于石墨烯方向的运动性能受到抑制.拉伸模拟结果表明,石墨烯能够提高聚乙烯材料的拉伸性能.在弹性区和屈服区,石墨烯阻碍了复合材料在垂直于拉伸方向的压缩变形,聚乙烯分子"吸附固化"结构保持稳定,引起体系整体应力的迅速升高.在软化区,由于石墨烯发生剧烈弯曲,"吸附固化"结构发生破坏,最终引起体系应力迅速减小.在弹性区和屈服区,体系应变主要引起了非键相互作用的改变.在软化区之后,应变主要导致了体系内分子成键相互作用的改变.应变速率能够提高复合材料的屈服应力,而不改变复合材料应力应变的整体趋势.

关键词：分子动力学模拟石墨烯聚乙烯单轴拉伸复合材料

碳纳米纤维与环氧树脂单体相互作用的分子动力学模拟

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高分子学报 2015年第10期25卷 1158-1164页

作者：陈生辉孙霜青 Steven R Gwaltney 李春玲王秀民胡松青中国石油大学(华东)理学院青岛266580 密西西比州立大学化学系美国密西西比州39762 中国石油大学(华东)山东省高校新能源物理与材料科学重点实验室青岛266580

利用分子动力学模拟方法,以双酚A型环氧树脂(DGEBA)和异佛尔酮二胺(IPD)分子为研究对象,对环氧树脂单体体系与碳纳米纤维表面之间的相互作用进行了分析.研究结果表明,环氧树脂单体分子受到碳纳米纤维的吸引作用,能够在碳纳米纤维表面形... 详细信息

利用分子动力学模拟方法,以双酚A型环氧树脂(DGEBA)和异佛尔酮二胺(IPD)分子为研究对象,对环氧树脂单体体系与碳纳米纤维表面之间的相互作用进行了分析.研究结果表明,环氧树脂单体分子受到碳纳米纤维的吸引作用,能够在碳纳米纤维表面形成了浓度较高的界面相,且在界面相内IPD分子浓度高于其体相浓度,而DGEBA分子浓度低于其体相浓度;界面相内,DGEBA的分子结构更加伸展,而IPD分子结构未发生明显变化;碳纳米纤维表面能够抑制界面相内单体分子的运动,其中在垂直于表面方向上的抑制作用最强.通过分析单体分子的结合能密度可知,碳纳米纤维与IPD分子的结合强度大于其与DGEBA分子的结合强度,这与前面的结果相吻合.

关键词：分子动力学模拟环氧树脂碳纳米纤维界面相相互作用

Plasmonic tandem heterojunctions enable high-efficiency charge transfer for broad spectrum photocatalytic hydrogen production

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Journal of Energy Chemistry 2025年第1期100卷 710-720页

作者： Wenxuan Chen Xiu-qing Qiao Guo Hui Bojing sun Dongfang Hou Meidi Wang Xueqian Wu Tao Wu Dong-Sheng Li College of Materials and Chemical Engineering Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials China Three Gorges University Hubei Three Gorges Laboratory College of Chemistry and Materials Science and Guangdong Provincial Key Laboratory of Supramolecular Coordination Chemistry Jinan University

Rational engineering of semiconductor photocatalysts for efficient hydrogen production is of great significance but still challenging,primarily due to the limitations in charge transfer ***,a fascinating plasmonic tandem heterojunction with the hc-CdS/Mo2C@C heterostructure is aimfully prepared for effectively promoting the charge separation kinetics of the CdS photocatalyst via the synergistic strategy of phase junction,Schottky junction,and photothermal *** difference in atomic configuration between cubic-CdS （c-CdS） and hexagonal-CdS （h-CdS） leads to effective charge separation through a typical Ⅱ charge transfer mechanism,and plasmonic Schottky junction further extracts the electrons in the hc-CdS phase junction to realize gradient charge ***,the photothermal effect of Mo2C@C helps to expand the light absorption,accelerate charge transfer kinetics,and reduce the hydrogen evolution energy *** carbon layer provides a fast channel for charge transfer and protects the photocatalyst from *** a result,the optimized hc-CMC photocatalyst exhibits a significantly high photocatalytic H2production activity of 28.63 mmol/g/h and apparent quantum efficiency of 61.8%,surpassing most of the reported *** study provides a feasible strategy to enhance the charge transfer kinetics and photocatalytic activity of CdS by constructing plasmonic tandem heterogeneous junctions.

关键词： Heterojunctions LSPR Photocatalyst Phase junction Schottky junction Photothermal effect

Changes of Bacterial Community Structure in Copper Mine Tailings After Colonization of Reed (Phragmites communis)

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Pedosphere 2008年第6期18卷 731-740页

作者： CHEN Yu-qing REN Guan-Ju AN Shu-qing sun qing-Ye LIU Chang-Hong shuang Jing-Lei College of Life Science Nanjing Normal University Nanjing 210046 （China） The State Key Laboratory of Pollution Control and Resource Reuses School of Life Science Nanjing University Nanjing 210093 （China） School of Life Science Anhui University Hefei 230039 （China）

Soil samples were collected from both bare and vegetated mine railings to study the changes in bacterial communities and soil chemical properties of copper mine tailings due to reed （Phragmites communis） colonization. The structures of bacterial communities were investigated using culture-independent 16S rRNA gene sequencing method. The bacterial diversity in the bare mine tailing was lower than that of the vegetated mine tailing. The former was dominated by sulfur metabolizing bacteria, whereas the latter was by nitrogen fixing bacteria. The bare mine tailing was acidic （pH = 3.78）, whereas the vegetated mine tailing was near neutral （pH ： 7.28）. The contents of organic matter, total nitrogen, and ammonium acetate-extractable potassium in vegetated mine tailings were significantly higher than those in the bare mine railings （P 〈 0.01）, whereas available phosphorus and electrical conductivity were significantly lower than those in the bare mine tailings （P 〈 0.01）. The results demonstrated that 16S rRNA gene sequencing could be successfully used to study the bacterial diversity in mine tailings. The colonization of the mine tailings by reed significantly changed the bacterial community and the chemical properties of tailings. The complex interactions between bacteria and plants deserve further investigation.

关键词： 16S rRNA gene bacterial diversity bacterial community functional group mine tailings

Inertial parameter estimation and control of non-cooperative target with unilateral contact constraint

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Chinese Journal of Aeronautics 2021年第3期34卷 225-240页

作者： shuang LI Yuchen SHE Jun sun College of Astronautics Nanjing University of Aeronautics and AstronauticsNanjing 210016China Shanghai Aerospace Control Technology Institute Shanghai 201109China Shanghai Key Laboratory of Aerospace Intelligent Control Technology Shanghai 201109China

In this paper, the relative sliding motion between the target and the manipulator’s endeffector is considered and characterized as a unilateral contact constraint. A new possible solution is presented to estimate the inertial parameters of a non-cooperative target while the relative sliding motion exists. First, the detailed analysis of the dynamical model is presented, and a parameterexplicit linear time-varying model is obtained. Then, an extended state observer is constructed based on the new model, which can effectively estimate the unknown inertial parameters of the target when relative sliding motion exists. As the modified reactionless controller requires the knowledge of inertial parameters, a hybrid post-capture control scheme is also established based on the switch law between different controllers. The correctness and efficiency of the proposed algorithm are validated by numerical simulation, which proves a potential framework for the non-cooperative target postcapture operation.

关键词： Non-cooperative object On-orbit servicing Post-capture control Parameter estimation Unilateral contact constraint

Thermal Properties of Mg–Al/AlN Composites Fabricated by Powder Metallurgy

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Acta Metallurgica Sinica(English Letters) 2018年第6期31卷 641-649页

作者： Jie Chen Chong-Gao Bao Zhi-Wei Liu Ben-shuang sun Yong-Chun Shu qing-Kui Li Henan Province Industrial Technology Research Institute of Resources and Materials Zhengzhou University State Key Laboratory for Mechanical Behavior of Materials School of Materials Science and EngineeringXi’an Jiaotong University

Magnesium matrix composites reinforced with AlN particles were fabricated by the powder metallurgy *** mixing methods were used in this study to control the distribution of Al N *** microstructure,thermal diffusivity and thermal expansion of the Mg–Al/Al N composites using different mixing methods were *** results showed that the intergranular and intragranular distributions of Al N particles were obtained,respectively,by controlling the mixing *** composite with intragranular particles exhibited lower thermal diffusivity because of the existences of more interfaces,defects and grain boundaries,which acted as scattering centers and reduced the mean free path of electrons and *** existence of Al N particles lowered the coefficient of thermal expansion（CTE）and enhanced the dimensional stability of the *** the use of the improved mixing method further reduced the CTE of Mg–Al/Al N composites.

关键词： Magnesium matrix composite Microstructure Thermal diffusivity Thermal expansion Mixing

Realization of arbitrary two-qubit quantum gates based on chiral Majorana fermions

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Chinese Physics B 2021年第4期30卷 43-54页

作者： qing Yan qing-Feng sun International Center for Quantum Materials School of PhysicsPeking UniversityBeijing 100871China CAS Center for Excellence in Topological Quantum Computation University of Chinese Academy of SciencesBeijing 100190China Collaborative Innovation Center of Quantum Matter Beijing 100871China Beijing Academy of Quantum Information Sciences Beijing 100193China

Quantum computers are in hot-spot with the potential to handle more complex problems than classical computers *** the quantum computation requires the universal quantum gate set {T,H,CNOT} so as to perform any unitary transformation with arbitrary *** we first briefly review the Majorana fermions and then propose the realization of arbitrary two-qubit quantum gates based on chiral Majorana *** cells consist of a quantum anomalous Hall insulator surrounded by a topological superconductor with electric gates and quantum-dot structures,which enable the braiding operation and the partial exchange *** defining a qubit by four chiral Majorana fermions,the singlequbit T and H quantum gates are realized via one partial exchange operation and three braiding operations,*** entangled CNOT quantum gate is performed by braiding six chiral Majorana ***,we design a powerful device with which arbitrary two-qubit quantum gates can be realized and take the quantum Fourier transform as an example to show that several quantum operations can be performed with this space-limited ***,our proposal could inspire further utilization of mobile chiral Majorana edge states for faster quantum computation.

关键词： quantum computation T gate CNOT gate braiding chiral Majorana fermions

Selberg＇s Integral for Ramanujan Automorphic Representation

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Acta Mathematica Sinica,English Series 2011年第7期27卷 1449-1454页

作者： qing Feng sun Department of Mathematics Shandong University Ji'nan 250100 P. R. China

Let π△ be the automorphic representation of GL（2, QA） associated with Ramanujan modular form A and L（s, π△） the global L-function attached to π△. We study Selberg＇s integral for the automorphic L-function L（s, π△） under GRH. Our results give the information for the number of primes in short intervals attached to Ramanujan automorphic representation.

关键词： Automorphic L-functions Selberg's integral primes in short intervals

The effects of grain texture and phenotypic traits on the thin-layer drying rate in maize(Zea mays L.) inbred lines

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Journal of Integrative Agriculture 2016年第2期15卷 317-325页

作者： sun Le-xiu LIU shuang-xi WANG Jin-xing WU Cheng-lai LI Yan ZHANG Chun-qing State Key Laboratory of Crop Biology/Agronomy College Shandong Agricultural University College of Mechanical & Electronic Engineering Shandong Agricultural University

To explore the relation of maize grain texture and phenotypic traits with grain thin-layer drying rate,we observed the ultra-structure of maize grain,and tested three traits about the maize grain texture and four phenotypic *** vitreous part percentage was different（P〈0.05） among different maize inbred *** was a significant relationship between the drying rate with grain texture and phenotypic *** factors that influenced the drying rate were different during different drying *** results observed that empirical constants（k and N） in drying equation were different for seed of the 30 inbred lines of *** k of simplified diffusion equation and N of page equation were significantly influenced by both grain texture and phenotypic *** results could be used as guideline parameters for drying maize seeds having different grain characteristics during different drying stages.

关键词： maize seeds texture and phenotypic traits drying rate drying parameters