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Observation of acoustic hybrid topological phases induced by the p-d orbital interactions

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 132-139页

作者： Xiao Xiang Feng Gao yu-Gui peng peng Wu Zong-Lin Li Xue-Feng Zhu School of Physics and Innovation Institute Huazhong University of Science and Technology

In spinless systems,growing attention has recently been attracted to synthetic gauge fields,which redefine the fundamental crystal symmetries by utilizing the projective algebraic ***,synthetic gauge fields have been commonly investigated in single orbital systems,and explorations on hybrid orbitals remain elusive in ***,we report the experimental observation of hybrid topological phases induced by hybrid synthetic gauge flux,which is formed by the interaction between p and d orbitals embedded in acoustic *** breaking the translation symmetries of Lxand/or Ly,we unambiguously demonstrate the first-order M?bius edge states and higher-order corner *** work establishes a platform for seeking exotic topological phases induced by hybrid-orbitals interactions and initializing the framework of hybrid-orbitalsrelated topological *** applications can be anticipated in scenarios such as high-quality sensing and robust wave trapping due to the stepwise energy distribution of the hybrid topological phase.

关键词： topological insulator synthetic gauge field projective symmetry corner states

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城市污水处理过程中微塑料赋存特征

中国环境科学 2018年第5期38卷 1734-1743页

作者：白濛雨赵世烨彭谷雨高磊李道季华东师范大学河口海岸学国家重点实验室上海200062

以上海某污水厂为例,研究了中国沿海城市污水厂进出水、污泥中微塑料的赋存特征及微塑料排放量.结果表明,污水厂进出水中微塑料形态主要为纤维状.进水含量最高的种类依次为人造丝(36.84%)、合成革(21.05%)和聚酯纤维(18.42%),出水中的... 详细信息

以上海某污水厂为例,研究了中国沿海城市污水厂进出水、污泥中微塑料的赋存特征及微塑料排放量.结果表明,污水厂进出水中微塑料形态主要为纤维状.进水含量最高的种类依次为人造丝(36.84%)、合成革(21.05%)和聚酯纤维(18.42%),出水中的种类依次为合成革(26.67%)、人造丝(24.44%)、聚酯纤维(17.78%)和聚乙烯(15.56%).微塑料在总进水中的丰度为117n/L(n为微塑料个数),调配水中为90n/L,总出水中为52n/L,污泥中为180n/50g(湿重).该污水厂日出水量为280万m^3/d,据此估算微塑料量由总进水中3276亿n/d降至总出水中1456亿n/d,去除率为55.6%.污水厂根据实际进水水质确定剩余污泥量150t DS/d,含有5.4亿个微塑料.此外,根据本研究结果讨论了有关国际刊物中对我国大陆范围内个人护理用品中微塑料入海量的不准确估算.

关键词：污水厂微塑料赋存特征排放量去除率

Boosting bidirectional sulfur conversion enabled by introducing boron-doped atoms and phosphorus vacancies in Ni2P for lithium-sulfur batteries

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Journal of Energy Chemistry 2025年第1期100卷 760-769页

作者： Lin peng yu Bai Hang Li Meixiu Qu Zhenhua Wang Kening Sun Advanced Research Institute of Multidisciplinary Science Beijing Institute of Technology Beijing Key Laboratory of Chemical Power Source and Green Catalysis School of Chemistry and Chemical Engineering Beijing Institute of Technology

Lithium-sulfur （Li-S） batteries have gained great attention due to the high theoretical energy density and low cost,yet their further commercialization has been obstructed by the notorious shuttle effect and sluggish redox ***,we supply a strategy to optimize the electron structure of Ni2P by concurrently introducing B-doped atoms and P vacancies in Ni2P （Vp-B-Ni2P）,thereby enhancing the bidirectional sulfur *** study indicates that the simultaneous introduction of B-doped atoms and P vacancies in Ni2P causes the redistribution of electron around Ni atoms,bringing about the upward shift of d-band center of Ni atoms and effective d-p orbital hybridization between Ni atoms and sulfur species,thus strengthening the chemical anchoring for lithium polysulfides （LiPSs） as well as expediting the bidirectional conversion kinetics of sulfur ***,theoretical calculations reveal that the incorporation of B-doped atoms and P vacancies in Ni2P selectively promotes Li2S dissolution and nucleation ***,the Li-S batteries with Vp-B-Ni2P-separators present outstanding rate ability of 777 m A h g-1at 5 C and high areal capacity of 8.03 mA h cm-2under E/S of 5μL mg-1and sulfur loading of 7.20 mg *** work elucidates that introducing heteroatom and vacancy in metal phosphide collaboratively regulates the electron structure to accelerate bidirectional sulfur conversion.

关键词： Lithium sulfur batteries

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基于随机搜索树法的机械臂视觉伺服研究

制造业自动化 2022年第1期44卷 156-159页

作者：彭叶予光张志鹏厦门双瑞船舶涂料有限公司厦门361101 厦门大学航空航天学院厦门361102

在当今的工业应用中,机械臂完成某一特定作业任务的基础是进行轨迹规划。针对单纯基于图像的视觉伺服(the image-based visual servoing,IBVS),不能直接对相机或机械臂的运行轨迹进行控制,容易造成跟踪目标脱离视野、机械臂与工作空间... 详细信息

在当今的工业应用中,机械臂完成某一特定作业任务的基础是进行轨迹规划。针对单纯基于图像的视觉伺服(the image-based visual servoing,IBVS),不能直接对相机或机械臂的运行轨迹进行控制,容易造成跟踪目标脱离视野、机械臂与工作空间障碍物相碰撞的问题,本文提出了三维随机搜索树算法(the three-dimensional Rapidly-exploring Random Trees algorithm,3D-RRT)实现机械臂的轨迹规划,将轨迹规划与视觉伺服相融合,使机械臂在跟踪移动过程中,满足图像视野范围限制和空间障碍物约束问题。在MATLAB平台建立算法仿真实验,结果表明三维随机搜索树算法(3D-RRT)可以较好解决基于图像的视觉伺服(IBVS)中存在的问题。

关键词：机械臂视觉伺服三维随机搜索树算法(3D-RRT)

High-temperature-tolerant flexible supercapacitors: Gel polymer electrolytes and electrode materials

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Journal of Energy Chemistry 2025年第1期100卷 426-457页

作者： Chong peng Xinyi Huang Mingwei Zhao Shuling Liao Quanhong Yang Nianjun Yang Siyu yu School of Chemistry & Chemical Engineering Southwest University Nanoyang Group Tianjin Key Laboratory of Advanced Carbon and Electrochemical Energy Storage School of Chemical Engineering and Technology and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Tianjin University Department of Chemistry & IMO-IMOMEC Hasselt University

The development of flexible supercapacitors(FSCs) capable of operating at high temperatures is crucial for expanding the application areas and operating conditions of supercapacitors. Gel polymer electrolytes and electrode materials stand as two key components that significantly impact the efficacy of hightemperature-tolerant FSCs(HT-FSCs). They should not only exhibit high electrochemical performance and excellent flexibility, but also withstand intense thermal stress. Considerable efforts have been devoted to enhancing their thermal stability while maintaining high electrochemical and mechanical performance. In this review, the fundamentals of HT-FSCs are outlined. A comprehensive overview of state-of-the-art progress and achievements in HT-FSCs, with a focus on thermally stable gel polymer electrolytes and electrode materials is provided. Finally, challenges and future perspectives regarding HT-FSCs are discussed, alongside strategies for elevating operational temperatures and *** review offers both theoretical foundations and practical guidelines for designing and manufacturing HT-FSCs, further promoting their widespread adoption across diverse fields.

关键词： Flexible supercapacitors High-temperature tolerance Gel polymer electrolytes Electrode materials

Low-cost and fluoride-free synthesis of MFI zeolite nanosheets with enhanced stability for benzene alkylation with ethanol

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Journal of Energy Chemistry 2025年第1期100卷 458-468页

作者： peng Zhu Cun Liu Yiren yu Guoshu Gao yumeng Zhao Xiongfu Zhang Guodong Liu Guohui Yang State Key Laboratory of Fine Chemicals School of Chemical Engineering Dalian University of Technology State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences

Zeolite nanosheets with a short b-axis thickness are highly desirable in lots of catalytic reactions due to their reduced diffusion resistance. Nevertheless, conventional synthesis methods usually require expensive structure-directing agents(SDAs), pricey raw materials, and eco-unfriendly fluorine-containing additives. Here, we contributed a cost-effective and fluoride-free synthesis method for synthesizing high-quality MFI zeolite nanosheets through a Silicalite-1(Sil-1) seed suspension and urea cooperative strategy, only with inexpensive colloidal silica as the Si source. Our approach was effective for synthesizing both Sil-1 and aluminum-containing ZSM-5 nanosheets. By optimizing key synthesis parameters,including seed aging time, seed quantity, and urea concentration, we achieved precise control over the crystal face aspect ratio and b-axis thickness. We also revealed a non-classical oriented nanosheet growth mechanism, where Sil-1 seeds induced the formation of quasi-ordered precursor particles, and the(010)crystal planes of these particles facilitated urea adsorption, thereby promoting c-axis-oriented *** obtained ZSM-5 nanosheets exhibited exceptional catalytic performance in the benzene alkylation with ethanol, maintaining stability for over 500 h, which is 5 times longer than traditional ZSM-5 catalysts. Furthermore, large-scale production of ZSM-5 nanosheets was successfully carried out in a 3 L highpressure autoclave, yielding samples consistent with those from laboratory-scale synthesis. This work marks a significant step forward in the sustainable and efficient production of MFI nanosheets using inexpensive and environmentally friendly raw materials, offering the broad applicability in catalysis.

关键词： MFI zeolite ZSM-5 Nanosheets Scale-up synthesis Aromatic alkylation

Correlation between the rock mass properties and maximum horizontal stress:A case study of overcoring stress measurements

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 39-48页

作者： peng Li Meifeng Cai Shengjun Miao yuan Li yu Wang Key Laboratory of Ministry of Education for Efficient Mining and Safety of Metal Mines University of Science and Technology BeijingBeijing 100083China State Key Laboratory of Coal Resources and Safe Mining China University of Mining and TechnologyXuzhou 221116China

Understanding the mechanical properties of the lithologies is crucial to accurately determine the horizontal stress *** investigate the correlation between the rock mass properties and maximum horizontal stress,the three-dimensional(3D)stress tensors at 89 measuring points determined using an improved overcoring technique in nine mines in China were adopted,a newly defined characteristic parameter C_(ERP)was proposed as an indicator for evaluating the structural properties of rock masses,and a fuzzy relation matrix was established using the information distribution *** results indicate that both the vertical stress and horizontal stress exhibit a good linear growth relationship with *** is no remarkable correlation between the elastic modulus,Poisson's ratio and depth,and the distribution of data points is scattered and ***,there is no obvious relationship between the rock quality designation(RQD)and *** maximum horizontal stress σ_(H) is a function of rock properties,showing a certain linear relationship with the C_(ERP)at the same *** addition,the overall change trend of σ_(H) determined by the established fuzzy identification method is to increase with the increase of C_(ERP).The fuzzy identification method also demonstrates a relatively detailed local relationship betweenσ_H and C_(ERP),and the predicted curve rises in a fluctuating way,which is in accord well with the measured stress data.

关键词： overcoring stress measurements elastic modulus Poisson's ratio rock quality designation maximum horizontal stress fuzzy identification

Investigation of Vacuum Ultraviolet Photoionization of Methylcyclohexane in Energy Region of 9-15.5 eV

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Chinese Journal of Chemical Physics 2020年第3期33卷 296-302,I0002页

作者： Hang Zhang Yan-bo Li Long Zhu Jun Chen ye-peng yu Zhao-hui Li Xuan Lin Xiao-bin Shan Fu-yi Liu Liu-si Sheng National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei 230029China

Vacuum ultraviolet(VUV)photoionization and photodissociation of methylcyclohexane have been studied utilizing a reflectron time-of-flight mass spectrometer(RTOF-MS)with synchrotron radiation *** efficiency curves(PIEs)of molecule ion C7H14^+ and fragment ions C7H13^+,C6H11^+,C6H10+,C5H10^+,C5H9^+,C4H8^+,C4H7^+,and C3H5^+ were *** ionization energy of methylcyclohexane was measured to be(9.80±0.03)eV,and appearance energies of fragment ions were determined from the *** structures of transitional states,intermediates and product ions were characterized at the B3LYP/6-31G(d)level and the energies were calculated using G3B3 *** channels of dominating fragment ions were *** hydrogen migrations and carbon ring-opening were the foremost processes in fragmentation pathways of methylcyclohexane.

关键词： Methylcyclohexane Photoionization and photodissociation Synchrotron radiation source Reflectron time-of-flight mass spectrometer

工学结合人才培养模式改革下的高职教学管理体系建设

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佳木斯职业学院学报 2014年第9期30卷 33-34页

作者：彭叶煜文苏州高博软件技术职业学院江苏苏州215000

高职教学主要是以就业为主要导向,要求专业技能与岗位规范零差距、教学实际内容和资格标准零差异,以及学生毕业和就业实现零过渡。一般来讲,工学结合是培养高职人才的切入口,同时还是实现教学目标非常重要的途径。本文分析了工学结合人... 详细信息

高职教学主要是以就业为主要导向,要求专业技能与岗位规范零差距、教学实际内容和资格标准零差异,以及学生毕业和就业实现零过渡。一般来讲,工学结合是培养高职人才的切入口,同时还是实现教学目标非常重要的途径。本文分析了工学结合人才培养模式的新要求,提出了工学结合人才培养模式改革下的高职教学管理体系建设的思路。

关键词：人才培养高职教学工学结合管理体系