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Improved photocatalytic performance of acetaldehyde degradation via crystal plane regulation on truncated octahedral CeO_(2)

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Rare Metals 2024年第5期43卷 2026-2038页

作者： Bin Xu Lu Jia Hui Yang Yue Wang Si-Yu Fan sai-sai yuan Qi-TaoZhang Ming Zhang Teruhisa Ohno School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225002China College of Environmental Science and Engineering Yangzhou UniversityYangzhou225127China Department of Applied Chemistry Faculty of EngineeringKyushu Institute of TechnologyKitakyushu804-8550Japan School of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang 212000China National&Local Joint Engineering Research Center for Mineral Salt Deep Utilization Huaiyin Institute of TechnologyHuaian 223003China School of Materials Science and Engineering Henan University of Science and TechnologyLuoyang 471000China International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education Institute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060China

In this study,the truncated octahedral CeO_(2)(CeO_(2)-to)with special morphology was prepared by the solvothermal method with oleic acid(OA)and oleamine(OM)as the morphology-directing ***-resolution transmission electron microscopy(HRTEM)results show that CeO_(2)-to exposes composite{100}and{111}facets,while CeO_(2)cubic(CeO_(2)-c)and CeO_(2)octahedral(CeO_(2)-o)only expose single crystal facets of{100}plane and{111}plane,***,this CeO_(2)-to photocatalyst exhibits remarkable photooxidation performance of gaseous acetaldehyde(CH_(3)CHO)degradation,in which CO_(2)generation value reaches 1.78 and 7.97-times greater than that of CeO_(2)-c and CeO_(2)-o,*** addition,the active species trapping experiment signifies that superoxide(·O_(2)^(-))and holes(h^(+))are the main reactive substances during the CH_(3)CHO degradation process,and the electron paramagnetic resonance(EPR)spectra indicates that the former is the major ***,the electron transfer mechanism between CeO_(2)-to{100}and{111}facets and the surface oxygen adsorption ability are revealed via density functional theory(DFT)*** is also confirmed that{100}facets are more conducive to the absorption of acetaldehyde than{111}***,a reasonable mechanism for improved photocatalytic CH_(3)CHO degradation on CeO_(2)-to is proposed based on relevant experiments and DFT *** study demonstrates that the systematic development of surface homojunction structured photocatalysts can efficiently increase the degradation activity for volatile organic compounds(VOCs).It also offers additional direction for optimizing the photocatalytic activity of other ceriumbased photocatalysts.

关键词： Truncated octahedral CeO_(2)(CeO_(2)-to) Composite crystal faces Surface energy level Efficient electrontransfer

Spatially charge-separated 2D homojunction for photocatalytic hydrogen production

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Rare Metals 2023年第12期42卷 3952-3959页

作者： Xi-Juan Wang sai-sai yuan Lei Yang Ying Dong Yi-Ming Chen Wu-Xiang Zhang Chuan-Xiang Chen Qi-Tao Zhang Teruhisa Ohno School of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang 212100China International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of EducationInstitute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060China Department of Applied Chemistry Faculty of EngineeringKyushu Institute of TechnologyKitakyushu 804-8550Japan

Suppression of photogenerated charge recombination is crucial for efficient photocatalytic hydrogen *** have garnered more attention than heterojunctions due to their superior crystal binding and band structure ***,most homojunctions suffer from redox interference caused by continuous oxidizing and reducing phases that impede the ability to improve photocatalytic ***,the preparation of homojunction photocatalysts with completely spatial separation of both in charge and redox phases remains ***,the preparation of a two-dimensional(2D)homojunction CeO_(2) with a back-to-back geometry and fully separated oxidizing and reducing phases is *** prepared CeO_(2) is composed of nanosheets with twocontrasting smooth and rough *** and theoretical results indicate that the rough surface contains more highly reducing CeO_(2){220}and strongly visiblelight-absorbing CeO_(2){200}facets than the smooth *** 2D homojunction CeO_(2) produces three-times more hydrogen than normal CeO_(2) nanosheets,and even more than that of CeO_(2) nanosheets loaded with gold *** work presents a new homojunction photocatalyst model with completely spatial separation of both in charge and redox phases that is expected to inspire further research into homojunction photocatalysts.

关键词： hydrogen charge separated

Insight Into the Separation-of-Variable Methods for the Closed-Form Solutions of Free Vibration of Rectangular Thin Plates

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Computer Modeling in Engineering & Sciences 2025年第1期142卷 329-355页

作者： Yufeng Xing Ye yuan Gen Li Institute of Solid Mechanics Beihang University(BUAA)Beijing100191China

The separation-of-variable(SOV)methods,such as the improved SOV method,the variational SOV method,and the extended SOV method,have been proposed by the present authors and coworkers to obtain the closed-form analytical solutions for free vibration and eigenbuckling of rectangular plates and circular cylindrical *** taking the free vibration of rectangular thin plates as an example,this work presents the theoretical framework of the SOV methods in an instructive way,and the bisection–based solution procedures for a group of nonlinear eigenvalue ***,the explicit equations of nodal lines of the SOV methods are presented,and the relations of nodal line patterns and frequency orders are *** is concluded that the highly accurate SOV methods have the same accuracy for all frequencies,the mode shapes about repeated frequencies can also be precisely captured,and the SOV methods do not have the problem of missing roots as well.

关键词： Separation-of-variable method Rayleigh quotient nodal line eigenvalue equation bisection method

地应力影响下的五孔掏槽爆破岩石损伤效应研究

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火工品 2025年第1期 89-96页

作者：杨赛群葛立芳李洪伟夏治园安徽江南爆破工程有限公司安徽宣城242000 安徽江南化工股份有限公司安徽合肥230088 安徽理工大学化工与爆破学院安徽淮南232001

在地下矿山开采过程中,地应力对巷道掘进效率的影响日益显著。本研究以某地下铁矿为研究对象,采用有限元软件LS-DYNA模拟不同地应力条件下五孔掏槽爆破掏槽孔孔间延期时间对岩石损伤程度的影响。通过现场爆破实验和块度识别软件验证模... 详细信息

在地下矿山开采过程中,地应力对巷道掘进效率的影响日益显著。本研究以某地下铁矿为研究对象,采用有限元软件LS-DYNA模拟不同地应力条件下五孔掏槽爆破掏槽孔孔间延期时间对岩石损伤程度的影响。通过现场爆破实验和块度识别软件验证模拟结果,探究了地应力、孔间延期时间与岩石损伤程度之间的关系。研究结果表明,地应力由0 MPa增加到10 MPa,五孔掏槽爆破掏槽孔最佳延期时间由60 ms减少为10 ms,相应的岩石损伤程度降低79%。地应力对爆破远区岩石裂纹的发育影响较大,而对近区影响较小。现场实验进一步证实了数值模拟的结论,表明可以根据实际地应力大小合理设置延期时间,有效降低大块率,提高爆破效率。

关键词：五孔掏槽爆破地应力延期时间 LS-DYNA 损伤程度

Noncyclic nonadiabatic holonomic quantum gates via shortcuts to adiabaticity

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Frontiers of physics 2021年第5期16卷 39-46页

作者： sai Li Pu Shen Tao Chen Zheng-yuan Xue Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials and School of Physics and Telecommunication EngineeringSouth China Normal UniversityGuangzhou510006China Guangdong-Hong Kong Joint Laboratory of Quantum Matter and Frontier Research Institute for PhysicsSouth China Normal UniversityGuangzhou510006China

High-fidelity quantum gates are essential for large-scale quantum ***,any quantum manipulation will inevitably affected by noises,systematic errors and decoherence effects,which lead to infidelity of a target quantum ***,implementing high-fidelity,robust and fast quantum gates is highly ***,we propose a fast and robust scheme to construct high-fidelity holonomic quantum gates for universal quantum computation based on resonant interaction of three-level quantum systems via shortcuts to *** our proposal,the target Hamiltonian to induce noncyclic non-Abelian geometric phases can be inversely engineered with less evolution time and demanding experimentally,leading to high-fidelity quantum gates in a simple ***,our scheme is readily realizable in physical system currently pursued for implementation of quantum ***,our proposal represents a promising way towards fault-tolerant geometric quantum computation.

关键词： noncyclic holonomic quantum gates shortcuts to adiabaticity Lewis-Riesenfeld invariant

Nonadiabatic geometric quantum computation with optimal control on superconducting circuits

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Frontiers of physics 2020年第4期15卷 17-24页

作者： Jing Xu sai LI Tao Chen Zheng-yuan Xue Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials and School of Physics and Telecommunication EngineeringSouth China Normal UniversityGuangzhou 510006China Frontier Research Institute for Physics South China Normal UniversityGuangzhou 510006China

Quantum gates,which are the essent ial building blocks of quantum computers,are very ***,to realize robust quanturm gates with high fidelity is the ultimate goal of quantum ***,we propose a nonadiabatic geometric quantum computation scheme on superconducting circuits to engineer arbitrary quantum gates,which share both the robust merit of geometric phases and the capacity to combine with optimal control technique to further enhance the gate ***-ically,in our proposal,arbitrary geometric single-qubit gates can be realized on a transmon qubit,by a resonant microwave field driving,with both the amplitude and phase of the driving being ***,nontrivial two-qubit gometric gates can be implemented by two capacitively coupled transmon qubits,with one of the transmon qubits'frequency being modulated to obtain ef-fective resonant coupling between ***,our scheme provides a promising step towards fault-tolerant solid-state quantum computation.

关键词： nonadiabatic geometric quantum computation superconducting circuits optimal control

Predicting submerged vegetation drag with a machine learning-based method

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Journal of Hydrodynamics 2024年第3期36卷 534-545页

作者： Meng-yang Liu Hong-wu Tang sai-yu yuan Jing Yan College of Water Conservancy and Hydropower Engineering Hohai UniversityNanjing210098China Key Laboratory of Hydrologic-Cycle and Hydrodynamic-System of Ministry of Water Resources Hohai UniversityNanjing210098China

Accurate estimation of the drag forces generated by vegetation stems is crucial for the comprehensive assessment of the impact of aquatic vegetation on hydrodynamic processes in aquatic *** coupling relationship between vegetation layer flow velocity and vegetation drag makes precise prediction of submerged vegetation drag forces particularly *** present study utilized published data on submerged vegetation drag force measurements and employed a genetic programming(GP)algorithm,a machine learning technique,to establish the connection between submerged vegetation drag forces and flow and vegetation *** using the bulk velocity,U,as the reference velocity scale to define the drag coefficient,C_(d),and stem Reynolds number,the GP runs revealed that the drag coefficient of submerged vegetation is related to submergence ratio(H^(*)),aspect ratio(d^(*)),blockage ratio(ψ^(*)),and vegetation density(λ).The relation between vegetation stem drag forces and flow velocity is implicitly embedded in the definition of C_(d).Comparisons with experimental drag force measurements indicate that using the bulk velocity as the reference velocity,as opposed to using the vegetation layer average velocity,U_(v),eliminates the need for complex iterative processes to estimate U_(v)and avoids introducing additional errors associated with U_(v)*** approach significantly enhances the model’s predictive capabilities and results in a simpler and more user-friendly formula expression.

关键词： Drag coefficient genetic programming algorithm submerged vegetation flow resistance cylinder array

The dynamics of river confluences and their effects on the ecology of aquatic environment:A review

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Journal of Hydrodynamics 2022年第1期34卷 1-14页

作者： sai-yu yuan Lei Xu Hong-wu Tang Yang Xiao Carlo Gualtieri State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Hohai UniversityNanjing210024China Yangtze Institute for Conservation and Development Nanjing210024China Department of Structures for Engineering and Architecture University of Napoli Federico IINapoliItaly

Confluences act as critical nodes in a river *** affect hydrodynamics,sediment transport,bed morphology,and eco-hydraulics of the river *** of streams produces the complex mechanism of flow momentum and mass mixing which may affect the aquatic environment locally and even lasting for a long distance *** confluence creates a hotspot for the river system’s ecological change,which usually leads to changes in water temperature,suspended-sediment load,bed material,nutrient concentrations,water chemistry,and organic-matter ***,the dynamics of river confluences are very complex and have critical effects on river system’s water environment and *** this reason,a review summarizing turbulent flow,sediment transport,morphological-dynamics,mixing processes,and their effects on the ecology of the aquatic environment at river confluences is in order.A future research agenda and opportunities pertinent to river confluence are vitally emphasized as a multidisciplinary research topic.

关键词： River confluence hydrodynamics sediment transport morpho dynamics water environment water ecology

Experimental investigation of turbulent flows around high-rise structure foundations and implications on scour

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Water Science and Engineering 2022年第1期15卷 47-56页

作者： Dong-fang Liang Hao Jia Yang Xiao sai-yu yuan Department of Engineering University of CambridgeCambridge CB21PZUK State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Hohai UniversityNanjing 210098China Yangtze Institute for Conservation and Development Hohai UniversityNanjing 210098China

Many studies have been undertaken to predict local scour around offshore high-rise structure foundations(HRSFs),which have been used in constructing the Donghai Wind Farm in ***,there have been few works on the turbulent flow that drives the scour *** this study,the characteristics of the turbulent flow fields around an HRSF were investigated using the particle image velocimetry *** mean flow,vorticity,and turbulence intensity were analyzed in *** relationship between the flow feature and scour development around an HRSF was *** results showed that the flow velocity increased to its maximum value near the third row of the pile *** shear layer and wake vortices could not be fully developed downstream of the last row of the piles at small Reynolds *** strong flow and turbulent fluctuation near the third piles explained the existence of a longtail scour pattern starting from the HRSF shoulders and a trapezoidal deposition region directly downstream of *** laboratory experiment gains insight into the mechanism of the turbulent flow around HRSFs and provides a rare dataset for numerical model verifications.

关键词： High-rise structure foundations(HRSFs) Turbulent flow fields Particle image velocimetry(PIV) Scour Sediment transport