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Intercalation-assisted Exfoliation Strategy for Two-dimensional Materials Preparation

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Chemical Research in Chinese Universities 2020年第4期36卷 518-524页

作者： ZHAO Yingchcng su Yucqi GUO Yuqiao WU Changzheng Hefei National Laboratory for Physical Sciences at the Microscale iChEM(Collaborative Innovation Center of Chemistry for Energy Materials)CAS Key LMboratoty of Mechanical Behavior and Design of MaterialsUniversity of Science and Technology of ChinaHefei 230026P.R.China

Controlled large-quantity synthesis of two-dimensional materials is vital for the research on their physical and chemical characters and potential *** structural features of layered compounds,intercalation of molecules or ions can be applied to the acceleration of liquid-phase *** this review,we aim at recent progress on synthesis of two-dimensional materials via intercalation-assisted exfoliation *** on wet chemical intercalation and electrochemical intercalation,together with product exfoliation afterwards,are ***,the features and advantages of intercalation-assisted exfoliation strategy for two-dimensional materials synthesis are discussed.

关键词： Two-dimensional material Liquid-phase exfoliation Intercalation

Hierarchical palladium catalyst for highly active and stable water oxidation in acidic media

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National Science Review 2023年第2期10卷 157-164页

作者： Jing Peng Haofeng sun Kun Ni Jiajing Wu Xinyu sun yueqi su Han Cheng Yuhua Liu Yuqiao Guo Wentuan Bi Yanwu Zhu Changzheng Wu Yi Xie Hefei National Laboratory for Physical Science at the Microscale CAS Center for Excellence in NanoscienceiChEM (Collaborative Innovation Center of Chemistry for Energy Materials) and CAS Key Laboratory of Mechanical Behavior and Design of Materials University of Science and Technology of China Institute of Energy Hefei Comprehensive National Science Center

Acidic water electrolysis is of great importance for boosting the development of renewable ***,it severely suffers from the trade-off between high activity and long lifespan for oxygen evolution catalysts on the anode *** is because the sluggish kinetics of oxygen evolution reaction necessitates the application of a high overpotential to achieve considerable current,which inevitably drives the catalysts far away from their thermodynamic equilibrium *** we demonstrate a new oxygen evolution model catalyst-hierarchical palladium(Pd) whose performance even surpasses the benchmark Ir-and Ru-based *** Pd catalyst displays an ultralow overpotential(196 mV),excellent durability and mitigated degradation(66 μV h-1) at 10 mA cm-2in 1 M *** strain on Pd(111) facets weakens the binding of oxygen species on electrochemical etching-derived hierarchical Pd and thereby leads to two orders of magnitudes of enhancement of mass activity in comparison to the parent Pd bulk ***,the Pd catalyst displays the bifunctional catalytic properties for both oxygen and hydrogen evolutions and can deliver a current density of 2 A cm-2at a low cell voltage of 1.771 V when fabricated into polymer ele ctrolyte membrane ele ctrolyser.

关键词： palladium oxygen evolution reaction acidic condition strain electrolysis

Shock Formation for 2D Isentropic Euler Equations with Self-similar Variables

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Chinese Annals of Mathematics,Series B 2024年第3期45卷 349-412页

作者： Wenze su School of Mathematical Sciences Fudan UniversityShanghai 200433China

The author studies the 2D isentropic Euler equations with the ideal gas *** exhibits a set of smooth initial data that give rise to shock formation at a single point near the planar *** solutions to the 2D isentropic Euler equations are associated with non-zero vorticity at the shock and have uniform-in-time-1/3-Holder ***,these point shocks are of self-similar type and share the same profile,which is a solution to the 2D self-similar Burgers *** proof of the solutions,following the 3D construction of Buckmaster,Shkoller and Vicol(in 2023),is based on the stable 2D self-similar Burgers profile and the modulation method.

关键词： 2D isentropic Euler equations Shock formation Self-similar solution

基于等效面积修正的铁尾矿砂浆分形维数与力学性能

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混凝土 2023年第11期 190-195页

作者：李艺郑笑天苏悦琦东北大学资源与土木工程学院辽宁沈阳110819

为研究铁尾矿砂浆孔隙结构与力学性能的关系,对普通砂浆(NSM)、铁尾矿砂浆(NTM)、丙烯酸普通砂浆(ASM)、丙烯酸铁尾矿砂浆(ATM)、玄武岩普通砂浆(BSM)、玄武岩铁尾矿砂浆(BTM)、丙烯酸-玄武岩普通砂浆(ABSM)和丙烯酸-玄武岩铁尾矿砂浆(A... 详细信息

为研究铁尾矿砂浆孔隙结构与力学性能的关系,对普通砂浆(NSM)、铁尾矿砂浆(NTM)、丙烯酸普通砂浆(ASM)、丙烯酸铁尾矿砂浆(ATM)、玄武岩普通砂浆(BSM)、玄武岩铁尾矿砂浆(BTM)、丙烯酸-玄武岩普通砂浆(ABSM)和丙烯酸-玄武岩铁尾矿砂浆(ABTM)进行抗压强度试验和抗折强度强度试验。采用Rapidair457孔结构分析仪获取砂浆孔结构特征参数,引入轮廓系数和圆度对孔隙面积进行修正,得到3种等效孔隙面积,给出基于等效面积修正的铁尾矿砂浆分形维数与力学性能的关系。结果表明:单掺铁尾矿砂和玄武岩纤维提高了NSM的抗压强度和抗折强度,单掺丙烯酸乳液降低了NSM的抗压强度和抗折强度;单掺丙烯酸乳液和玄武岩纤维降低了NTM的抗压强度和抗折强度;复掺丙烯酸乳液和玄武岩纤维降低了NSM的抗压强度,提高了NSM的抗折强度,降低了NTM的抗压强度和抗折强度。铁尾矿砂、丙烯酸乳液和玄武岩纤维的掺入均会增大砂浆含气量,且含气量与抗压强度和抗折强度均呈负相关。引入轮廓系数和圆度对砂浆孔隙面积进行修正,可提高分形维数计算精度,进而更为准确地表征分形维数与力学性能的关系。基于等效面积3修正的分形维数与抗压强度和抗折强度的相关性最高,说明同时考虑孔隙轮廓系数和圆度更符合孔隙实际情况。

关键词：铁尾矿砂浆抗压强度抗折强度等效面积分形维数

Design and pricing of maintenance service contract based on Nash non-cooperative game approach

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Journal of Systems Engineering and Electronics 2024年第1期35卷 118-129页

作者： su Chun HUANG Kui School of Mechanical Engineering Southeast UniversityNanjing 211189China

Nowadays manufacturers are facing fierce *** from the products,providing customers with multiple maintenance options in the service contract becomes more popular,since it can help to improve customer satisfaction,and ultimately promote sales and maximize profit for the *** considering the combinations of corrective maintenance and preventive maintenance,totally three types of maintenance service contracts are ***,attractive incentive and penalty mechanisms are adopted in the *** this basis,Nash non-cooperative game is applied to analyze the revenue for both the manufacturer and customers,and so as to optimize the pricing mechanism of maintenance service contract and achieve a win-win *** experiments are *** results show that by taking into account the incentive and penalty mechanisms,the revenue can be improved for both the customers and ***,with the increase of repair rate and improvement factor in the preventive maintenance,the revenue will increase gradually for both the parties.

关键词： maintenance service contract Nash game incentive and penalty mechanism corrective maintenance preventive maintenance

Study on viscosity mechanism of caffeine crystallization solutions Author links open overlay panel

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Particuology 2024年第8期91卷 341-350页

作者： Linjing Yu Min su School of Chemical Engineering Hebei University of TechnologyTianjin300130China

The solid-liquid viscous system formed by high viscosity crystallization solution impacts the flow and separation ***,it is very important to study the viscosity mechanism to improve viscosity and regulate crystallization,ensuring a seamless production ***,the viscosity of crystallization solution was taken as the measurement parameter of caffeine as a model *** investigated the viscosity mechanism of caffeine crystallization solutions by combining experiment and *** results indicated that the weak interactions between caffeine and water result in increased viscosity of the caffeine crystallization ***,caffeine crystals possess elongated needle-like shapes,featuring a substantial specific surface ***,there isπ-πstacking occurring between the(200)crystal face and(110)crystal face,effectively fostering coalescence of the crystals towards the radial side of the crystal along its elongated axis,resulting in a more viscous crystallization *** results contribute to comprehending the viscosity mechanism of crystal systems and provide theoretical foundation to enhance engineering efficiency in crystallization.

关键词： Crystallization Caffeine Viscosity mechanism Molecular simulation

Towards the Jacobian Conjecture

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Algebra Colloquium 2024年第3期31卷 361-388页

作者： Yucai su Department of Mathematics Jimei UniversityXiamen 361021China School of Mathematical Sciences Tongji UniversityShanghai 200092China

We first show that if there is a counterexample to the two-dimensional Jacobian conjecture,then there exists a nonempty closed smooth affine surface in C^(2)×C^(2)satisfying various ***,we conjecture that such a surf... 详细信息

关键词： two-dimensional Jacobian conjecture Keller maps Jacobian pairs

气举阀气举排液采气工艺参数设计与优选技术研究

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天然气工业 2006年第3期26卷 103-106页

作者：苏月琦汪海汪召华栾艳春中原油气高新股份有限公司天然气产销厂

东濮凹陷气藏多属低渗致密砂岩气藏,开发过程中表现为气井产能低、压力下降快、地层水矿化度高、积液影响严重等特征。气举排液是一项常用的气井排液采气工艺方法,具有很强的适应性,不但适用于低产气井的辅助排液采气,而且还适用于各种... 详细信息

东濮凹陷气藏多属低渗致密砂岩气藏,开发过程中表现为气井产能低、压力下降快、地层水矿化度高、积液影响严重等特征。气举排液是一项常用的气井排液采气工艺方法,具有很强的适应性,不但适用于低产气井的辅助排液采气,而且还适用于各种类型积液停产气井的诱喷排液复产。受井筒流态差异的影响,气井气举阀气举诱喷排液不同于油井气举阀气举采油,简单照搬油井气举阀排液设计模式难以在气井诱喷中获得成功。文章结合工作实践,对气举阀及气举排液采气工作原理进行了剖析,对气举排液采气工艺特点与影响因素进行了论述,对气举排液采气工艺参数进行了设计,并编制了软件,实现了程序化,现场应用取得了较好效果。

关键词：气举阀排液采气工艺参数现场试验

A Time-Domain Numerical Simulation for Free Motion Responses of Two Ships Advancing in Head Waves

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China Ocean Engineering 2024年第3期38卷 519-530页

作者： PAN su-yong CHENG Yong School of Naval Architecture and Ocean Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China

The constant panel method within the framework of potential flow theory in the time domain is developed for solving the hydrodynamic interactions between two parallel ships with forward *** solving problems within a time domain framework,the free water surface needs to simultaneously satisfy both the kinematic and dynamic boundary conditions of the free water *** provides conditions for adding artificial damping *** the Runge−Kutta method to solve equations related to *** upwind differential scheme is used in the present method to deal with the convection terms on the free surface to prevent waves *** the comparison with the available experimental data and other numerical methods,the present method is proved to have good mesh convergence,and satisfactory results can be *** constant panel method is applied to calculate the hydrodynamic interaction responses of two parallel ships advancing in head *** simulations are conducted on the effects of forward speed,different longitudinal and lateral distances on the motion response of two modified Wigley ships in head *** further investigations are conducted on the effects of different ship types on the motion response.

关键词： ship motions time domain simulation forward speed different distances wave loads