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Frontiers of Environmental Science & Engineering 2022年第4期16卷 157-160页

作者： Zhida Li lu lu State Key Laboratory of Urban Water Resource and Environment School of Civil and Environmental EngineeringHarbin Institute of TechnologyShenzhen 518055China

Current wastewater treatment(WWT)is energy-intensive and leads to vast CO_(2) *** pledge of“double carbon”target encourages a paradigm shift from fossil fiiels use to renewable energy harvesting during *** this context,hybrid microbial photoelectrochemical(MPEC)system integrating microbial electrochemical WWT with artificial photosynthesis(APS)emerges as a promising approach to tackle water-energy-carbon challenges ***,we emphasized the significance to implement energy recovery during WWT for achieving the carbon neutrality ***,we elucidated the working principle of MPEC and its advantages compared with conventional APS,and discussed its potential in fulfilling energy self-sustaining WWT,carbon capture and solar fuel ***,we provided a strategy to judge the carbon profit by analysis of energy and carbon fluxes in a MPEC using several common organics in ***,MPEC provides an alternative of WWT approach to assist carbon-neutral goal,and simultaneously achieves solar harvesting,conversion and storage.

关键词： Wastewater treatment Artificial photosynthesis Microbial photoelectrochemical(MPEC)system Carbon neutral Renewable energy

Controlled wrinkling analysis of thin films on gradient substrates

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Applied Mathematics and Mechanics(English Edition) 2017年第5期38卷 617-624页

作者： Jianzhong ZHAO Xingming GUO lu lu Shanghai Institute of Applied Mathematics and Mechanics Shanghai Key Laboratory of Mechanics in Energy EngineeringShanghai UniversityShanghai 200072China

The paper investigates continuously changing wrinkle patterns of thin films bonded to a gradient substrate. Three types of gradient substrates including exponential, power-law, and symmetry models are considered. The Galerkin method is used to dis- cretize the governing equation of film bonded to gradient substrates. The wavelength and the normalized amplitude of the wrinkles for substrates of various material gradients are obtained. The numerical simulation based on the finite element method （FEM） is used to evolve the wrinkle patterns. The result agrees well with that of the analytical model. It is concluded that localization of wrinkle patterns strongly depends on the material gradient. The critical membrane force depends on both the minimum value of wrinkle stiffness and the gradient of wrinkle stiffness when the wrinkle stiffness is at its minimum. This work provides a better understanding for local wrinkle formation caused by gradient substrates.

关键词： thin film gradient substrate wrinkle material gradient Galerkin method

Study of damage to a high concrete dam subjected to underwater shock waves

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Earthquake Engineering and Engineering Vibration 2014年第2期13卷 337-346页

作者： lu lu Li Xin Zhou Jing Faculty of Architecture and Civil Engineering Huaiyin Institute of Technology The State Key Laboratory of Coastal and Offshore Engineering Dalian University of Technology

To study the effect of a strong underwater shock wave on a concrete dam, this research aims to improve hammer impact methods in model tests. Six 1:200 scale models were designed and tested under distributed impact loads. A device was deployed for a direct measurement of the impact force at the upstream face of the dams. The model dam bases were anchored to prevent displacement. The experimental results indicate that the top part of the concrete dam is a weak zone, and the impact failure initiates with a fracture on the top of the dam. The peak value of impact stress increases when the second crack appears in the concrete dam from the upstream face to the downstream face. And, the level of the second crack in the dam body is lower as the peak value of impact stress increases. In this study, dynamic analysis was conducted by calculating the results to verify the effectiveness of a device to directly measure the impact force. This method may be used to approximately forecast the damage of concrete dam and may also be useful in other engineering applications.

关键词： underwater shock wave hammer impact impact force high concrete gravity dam forecast damage

N,S-codoped porous carbon nanosheets decorated with Fe_(3)C nanoparticles as high-performance anode materials for lithium ion hybrid supercapacitors

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Rare Metals 2022年第7期41卷 2517-2526页

作者： Lin Gao lu-lu Zhang Xue-Lin Yang College of Electrical Engineering&New Energy Hubei Collaborative Innovation Center for Microgrid of New EnergyThree Gorges UniversityYichang 443002China

The practical applications of carbon anode for lithium-ion batteries(LIBs)are largely obstructed by their moderate rate capability and cyclic ***,we report a N,S-codoped porous carbon nanosheet(NSC)decorated with Fe_(3)C nanoparticles(Fe_(3)C/NSC)by a one-pot pyrolysis *** high surface area and abundant defects of NSC can not only promote electrons and ions transfer,but also induce high pseudocapacitive *** importantly,the synergistic catalysis effect of Fe-Nx and Fe_(3)C can catalyze the reversible conversion of some solid electrolyte interface(SEI)components to offer excess capacity during *** expected,the Fe_(3)C-NSC anode delivers a discharge capacity of750 mAh·g^(-1)under a current density of 0.5 A·g^(-1)through 500 cycles and retains a dis-charge capacity of 366 mAh·g^(-1)at 4 A·g^(-1)after 1600 cycles,*** importantly,the lithium-ion capacitors based on Fe_(3)C/NSC anode demonstrate a high energy density of 249.5 Wh·kg^(-1)at 560 W·kg^(-1).

关键词： Fe_(3)C/NSC Lithium-ion batteries Pseudocapacitive behavior Lithium-ion capacitors

Microstructure and secondary phases in epitaxial LaBaCo_2O_(5.5 + δ) thin films

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Journal of Materials Science & Technology 2018年第2期34卷 398-402页

作者： Jiangbo lu lu lu Sheng Cheng Ming Liu Chunlin Jia School of Electronic and Information Engineering & State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons Forschungszentrum Jülich GmbH

Aberration-corrected scanning transmission electron microscopy was employed to investigate the microstructures and secondary phases in LaBaCo2O5.5＋δ（LBCO） thin films grown on SrTiO3 （STO） substrates. The as-grown films showed an epitaxial growth on the substrates with atomically sharp interfaces and orientation relationships of [100]LBCO//[100]STO and （001）LBCO//（001）STO. Secondary phases were observed in the films, which strongly depended on the sample fabrication conditions. In the film prepared at a temperature of 900 ℃, nano-scale CoO pillars nucleated on the substrate, and grew along the [001] direction of the film. In the film grown at a temperature of 1000 ℃, isolated nano-scale C0304 particles appeared, which promoted the growth of {111 } twinning structures in the film. The orientation relationships and the interfaces between the secondary phases and the films were illustrated, and the growth mechanism of the film was discussed.

关键词： Nano-structure Faceted interfaces Secondary phase growth Epitaxial thin film Microstructure Aberration-corrected scanning transmission electron microscopy

Polymer Translocation

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Chinese Journal of Polymer Science 2023年第5期41卷 683-698,I0007页

作者： lu-Wei lu Zhen-Hua Wang An-Chang Shi Yu-Yuan lu Li-Jia An State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China University of Science and Technology of China Hefei 230026China Department of Physics and Astronomy McMaster UniversityHamiltonOntario L8S4M1Canada

The translocation of a polymer through a pore that is much smaller than its size is a fundamental and actively researched topic in polymer *** understanding of the principles governing polymer translocation provides important guidance for various practical applications,such as the separation and purification of polymers,nanopore-based single-molecule deoxyribonucleic acid/ribonucleic acid(DNA/RNA)sequencing,transmembrane transport of DNA or RNA,and infection of bacterial cells by *** past several decades have seen great progresses on the study of polymer *** we present an overview of theoretical,experimental,and simulational stduies on polymer translocation,focusing on the roles played by several important factors,including initial polymer conformations,external fields,polymer topology and architectures,and confinement *** highlight the physical mechanisms of different types of polymer translocations,and the main controversies about the basic rules of translocation *** compare and contrast the behaviors of force-induced versus flow-induced translocations and the effects of unknotted versus knotted ***,we mention several opportunities and challenges in the study of polymer translocation.

关键词： Polymer translocation Knotted polymers Translocation time Critical flux

Exponential stability of a pendulum in dynamic boundary feedback with a viscous damped wave equation

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Journal of Control and Decision 2022年第2期9卷 186-192页

作者： lu lu Bao-Qing lu School of Basic Courses Beijing PolytechnicBeijngPeoples Republic of China School of Stistics Renmin University of ChinaBeijngPeople's Republic of China

In this paper,we continue the earlier work[lu,L,&Wang,D.L.(2017).Dynamic boundary feed-back of a pendulum coupled with a viscous damped wave *** Proceedings of the 36th Chinese Control Conference(CCQ)(pp.1676-1680)]on study the stability of a pendulum coupled with a viscous damped wave equation *** time we get the exponential stability result which is much better than the previous strong *** a detailed spectral analysis and opera-tor separation,we establish the Riesz basis property as well as the spectrum determined growth condition for the ***,the exponential stability of the system is achieved.

关键词： Pendulum dynamic boundary feedback control viscous damping spectral analysis exponential stability

2D VARIABLE FACTOR LEARNING CONTROLLER AND ITS APPLICATION IN PNEUMATIC SERVO SYSTEM

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Chinese Journal of Mechanical Engineering 1998年第4期11卷 24-29页

作者： lu, lu Gu, Yiming Shi, Weixiang Xi'an Jiaotong Univ Xi'an China

A new learning control law is presented which can obtain learning gain matrices from a recursive identifier along the learning axis. The system convergence is proved when disturbances exist in the system. Finally it i... 详细信息

关键词： Learning control Convergence Pneumatic servo system

Exponential Attractor of the 3D Derivative Ginzburg-Landau Equation

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Acta Mathematica Sinica,English Series 2008年第5期24卷 809-828页

作者： Shu Juan lu Qi Shao lu Department of Mathematics & LMIB Beijing University of Aeronautics and Astronautics Beijing 100083 P. R. China

In this paper, we consider a derivative Ginzburg-Landau-type equation with periodic initial-value condition in three-dimensional spaces. Sufficient conditions for existence and uniqueness of a global solution are obtained by uniform a priori estimates of the solution. Furthermore, the existence of a global attractor and an exponential attractor with finite dimensions are proved.

关键词： derivative Ginzburg-Landau equation global attractor exponential attractor Hausdorff dimension fractal dimension

Automorphism Groups of a Class of Cubic Cayley Graphs on Symmetric Groups

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Algebra Colloquium 2017年第4期24卷 541-550页

作者： Xueyi Huang Qiongxiang Huang lu lu College of Mathematics and Systems Science Xinjiang University Urumqi Xinjiang 830046 China

Let Sn denote the symmetric group of degree n with n 〉 3, S = {cn = （1 2…n）, cn^-1, （1 2）} and Fn=Cay（Sn, S） be the Cayley graph on Sn with respect to S. In this paper, we show that Fn （n 〉 13） is a normal Cayley graph, and that the full automorphism group of Fn is equal to Aut（Гn） = R（Sn）（Inn（C））≌- Sn×Z2, where R（Sn） is the right regular representation of Sn,φ = （1 2）（3 n）（4 n-1）（5 n-2）... （∈ Sn）, and Inn（C） is the inner isomorphism of Sn induced by φ .

关键词： Cayley graph normal automorphism group