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Metal-organic frameworks with dinuclear metal centers for synergistically boosting CO2 photoreduction

Science China Chemistry 2025年第01期 201-208页

作者： Hui-Feng Wang Wen-Jie Shi Yu-Xin Yang Bao-Xia Dong Tong-Bu Lu Di-Chang zhong School of Chemistry and Chemical Engineering Yangzhou University Institute for New Energy Materials and Low Carbon Technologies School of Materials Science and Engineering Tianjin University of Technology

Dinuclear metal synergistic catalysis （DMSC） has been proved powerful in boosting CO2reduction,while this has not been achieved in heterogeneous catalysts with long-range order *** this study,we,by introduction of metal catalytic centers into an indium-based metal-organic framework （MOF）,obtained a series of isostructural In-MOFs,including three MOFs with mononuclear metal catalytic center （M-In）,three MOFs with dinuclear homometallic catalytic centers （MM-In）,and three MOFs with dinuclear heterometallic catalytic centers (MM’-In,M/M’=Co（II）,Ni（II）,Zn（II）).It was found that all these MOFs can serve as catalysts for photochemical CO2reduction to *** with M-In,the catalytic activities of MM-In were obviously enhanced,and that of MM’-In was further significantly *** example,the CO yield of Co Zn-In reaches a record value of 12,700μmol g-1h-1,which is 4.0,8.1,9.4,and 18.6-fold higher than that of Co Co-In,Zn Zn-In,Co-In,and Zn-In,***,the catalytic activities of Co Ni-In and Ni Zn-In also show different fold increase than those of corresponding dinuclear homometallic and mononuclear metallic *** results of control experiments and theoretical calculation reveal that the higher catalytic activities of MM-In over M-In can be ascribed to the DMSC effect,and the higher catalytic activity of MM’-In over MM-In can be ascribed to the strengthened DMSC *** work reveals the relationship between DMSC effect and bimetal centers in CO2reduction,which provides new insights into the DMSC and paves a new way to design highly active catalysts for photochemical CO2reduction.

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GIS-based evaluation of landslide susceptibility using a novel hybrid computational intelligence model on different mapping units

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Journal of Mountain Science 2020年第12期17卷 2929-2941页

作者： ZHANG Ting-yu MAO zhong-an WANG tao Shaanxi Provincial Land Engineering Construction Group Land Survey Planning and Design Institute Co. Ltd.Xi'an710075China

Landslide susceptibility mapping is significant for landslide *** approaches have been used for landslide susceptibility prediction,however,their performances are *** study constructed a hybrid model,namely box counting dimension-based kernel logistic regression model,which uses fractal dimension calculated by box counting method as input data based on grid cells mapping unit and terrain mapping *** performance of this model was evaluated in the application in Zhidan County,Shaanxi Province,***,a total of 221 landslides were identified and mapped,and 11 landslide predisposing factors were ***,the landslide susceptibility maps(LSMs) of the study area were obtained by constructing the model on two different mapping ***,the results were evaluated with five statistical indexes,sensitivity,specificity,positive predictive value(PPV),negative predictive value(NPV) and *** statistical indexes of the model obtained on the terrain mapping unit were larger than those based on grid cells mapping *** training and validation datasets,the area under the receiver operating characteristic curve(AUC) of the model based on terrain mapping unit were 0.9374 and 0.9527,respectively,indicating that establishing this model on the terrain mapping unit was advantageous in the study *** results show that the fractal dimension improves the prediction ability of the kernel logistic *** addition,the terrain mapping unit is a more promising mapping unit in Loess areas.

关键词： Kernel logistic regression model Landslide susceptibility GIS Fractal dimension

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EXPERIMENTAL STUDY OF CONDENSATION HEAT TRANSFER CHA- RACTERISTICS OF HORIZONTAL TUBE BUNDLES IN VACUUM STATES

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Journal of Hydrodynamics 2012年第4期24卷 628-634页

作者： CHENG Shen SUN Feng-zhong SHI Yue-tao School of Energy Source and Power Engineering Shandong UniversityJinan 250061China

TO develop an excellent heat transfer element under the vacuum condition, experiments about the heat transfer performance of horizontal tube bundles of different materials under various vacuum conditions were carried out, including the stainless steel tube, the brass tube, the Ni-based implanted steel tube and the ion implanted brass tube. The relative trends show that the condensation heat transfer coefficient and the overall heat transfer coefficient of bundles of four materials all increase with the vacuum degree, especially, those of the Ni-based implanted steel tube and the ion implanted brass tube. Under a high vacuum condition （0.07 MPa）, the condensation heat transfer coefficient of the Ni-based implanted steel tube bundle is about 1.4 times of that of the stainless steel tube bundle, the condensation heat transfer coefficient of the ion implanted brass tube bundle is found to be about 1.3 times of that of the common brass tube bundle. Therefore, according to the condensation heat transfer characteristics studied under high vacuum conditions, it is believed that a dropwise condensation is partly achieved on the surface of these two implanted tube bundles, and the ion implantation is shown to be an effective method to achieve the dropwise condensation. Based on this study, it is believed that the Ni-based steel tube may replace the brass tube, which is more expensive as a heat transfer component.

关键词： vacuum heat transfer characteristics condensation heat transfer coefficient dropwise condensation

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Multi-objective optimization of p-xylene oxidation process using an improved self-adaptive differential evolution algorithm

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Chinese Journal of Chemical Engineering 2017年第8期25卷 983-991页

作者： Lili tao Bin Xu Zhihua Hu Weimin zhong College of Engineering Shanghai Polytechnic University School of Mechanical Engineering Shanghai University of Engineering Science Key Laboratory of Advanced Control and Optimization for Chemical Processes Ministry of Education East China University of Science and Technology

The rise in the use of global polyester fiber contributed to strong demand of the Terephthalic acid （TPA）. The liquid-phase catalytic oxidation of p-xylene （PX） to TPA is regarded as a critical and efficient chemical process in industry [ 1 ]. PX oxidation reaction involves many complex side reactions, among which acetic acid combustion and PX combustion are the most important. As the target product of this oxidation process, the quality and yield of TPA are of great concern. However, the improvement of the qualified product yield can bring about the high energy consumption, which means that the economic objectives of this process cannot be achieved simulta- neously because the two objectives are in conflict with each other. In this paper, an improved self-adaptive multi-objective differential evolution algorithm was proposed to handle the multi-objective optimization prob- lems. The immune concept is introduced to the self-adaptive multi-objective differential evolution algorithm （SADE） to strengthen the local search ability and optimization accuracy. The proposed algorithm is successfully tested on several benchmark test problems, and the performance measures such as convergence and divergence metrics are calculated. Subsequently, the multi-objective optimization of an industrial PX oxidation process is carried out using the proposed immune self-adaptive multi-objective differential evolution algorithm （ISADE）. Optimization results indicate that application oflSADE can greatly improve the yield of TPA with low combustion loss without degenerating TA quality.

关键词： p-Xylene oxidation Operation condition optimization Multi-objective optimization Self-adaptive differential evolution

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Joint information transmission design for intelligent reflecting surface aided system with discrete phase shifts

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Science China(Information Sciences) 2023年第3期66卷 253-262页

作者： Qin tao Shuowen ZHANG Caijun zhong Yushu ZHANG College of Information Science and Electronic Engineering Zhejiang University Department of Electronic and Information Engineering The Hong Kong Polytechnic University Aerospace Information Research Institute Chinese Academy of Sciences

This paper studies the joint information transmission for an intelligent reflecting surface(IRS)aided single-input multiple-output(SIMO) communication system, where an IRS with discrete phase shifts aims to deliver its sensed information to the receiver, besides being a helper of the SIMO system. We first introduce the joint modulation strategy for delivering the information of the primary system and the IRS simultaneously. Specifically, the IRS modulates its information in both the received antenna index and the received signal phase; while the transmitter limits its signal phase in a small region to avoid aliasing. For the proposed strategy, we devise an IRS discrete phase shifts design to maximize the received signal power at the selected receive antenna. Then, we propose a receiver constellation design for the IRS’s and transmitter’s information to maximize the minimum Euclidean distance. Numerical results show that the proposed scheme is practical and competitive compared with several existing joint information transmission schemes.

关键词： IRS information transmission constellation design

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A residual denoising and multiscale attention-based weighted domain adaptation network for tunnel boring machine main bearing fault diagnosis

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Science China(Technological Sciences) 2024年第8期67卷 2594-2618页

作者： zhong tao QIN ChengJin SHI Gang ZHANG ZhiNan tao JianFeng LIU ChengLiang State Key Laboratory of Mechanical System and Vibration School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240China

As a critical component of a tunnel boring machine(TBM),the precise condition monitoring and fault analysis of the main bearing is essential to guarantee the safety and efficiency of the TBM cutter ***,under conditions of strong noise and complex working environments,traditional signal decomposition and machine learning methods struggle to extract weak fault features and achieve high fault classification *** address these issues,we propose a novel residual denoising and multiscale attention-based weighted domain adaptation network(RDMA-WDAN)for TBM main bearing fault *** approach skillfully designs a deep feature extractor incorporating residual denoising and multiscale attention modules,achieving better domain adaptation despite significant domain *** residual denoising component utilizes a convolutional block to extract noise features,removing them via residual ***,the multiscale attention module uses a 4-branch convolution and 3 pooling strategy-based channel–spatial attention mechanism to extract multiscale features,concentrating on deep fault *** training,a weighting mechanism is introduced to prioritize domain samples with clear fault *** optimizes the deep feature extractor to obtain common features,enhancing domain adaptation.A low-speed and heavy-loaded bearing testbed was built,and fault data sets were established to validate the proposed *** experiments show that in noise domain adaptation tasks,proposed the RDMA–WDAN significantly improves target domain classification accuracy by 42.544%,23.088%,43.133%,16.344%,5.022%,and 9.233%over dense connection network(DenseNet),squeeze–excitation residual network(SE-ResNet),antinoise multiscale convolutional neural network(ANMSCNN),multiscale attention module-based convolutional neural network(MSAMCNN),domain adaptation network,and hybrid weighted domain adaptation(HWDA).In combined noise and working condition domain a

关键词： tunnel boring machine(TBM) main bearing fault diagnosis domain adaptation antinoise cross working RDMA-WDAN

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A FINITE DIFFERENCE SCHEME FOR SOLVING THE NONLINEAR POISSON-BOLTZMANN EQUATION MODEling CHARGED SPHERES

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Journal of Computational Mathematics 2006年第3期24卷 252-264页

作者： zhong-hua Qiao Zhi-lin Li tao Tang Department of Mathematics Hong Kong Baptist University Kowloon Tong Hong Kong China Center for Research in Scientific Computation and Department of Mathematics North Carolina State University Raleigh NC 27695 USA

In this work, we propose an efficient numerical method for computing the electrostatic interaction between two like-charged spherical particles which is governed by the nonlinear Poisson-Boltzmann equation. The nonlinear problem is solved by a monotone iterative method which leads to a sequence of linearized equations. A modified central finite difference scheme is developed to solve the linearized equations on an exterior irregular domain using a uniform Cartesian grid. With uniform grids, the method is simple, and as a consequence, multigrid solvers can be employed to speed up the convergence. Numerical experiments on cases with two isolated spheres and two spheres confined in a charged cylindrical pore are carried out using the proposed method. Our numerical schemes are found efficient and the numerical results are found in good agreement with the previous published results.

关键词： Nonlinear Poisson-Boltzmann equation Electrostatic interaction Irregulardomain Monotone iterative method Multigrid solver

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Subdural effusion associated with COVID-19 encephalopathy: A case report

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World Journal of Clinical Cases 2024年第10期12卷 1799-1803页

作者： Zhi-Yuan Xue zhong-Lin Xiao Ming Cheng tao Xiang Xiao-Li Wu Qiao-ling Ai Yang-ling Wu tao Yang Department of Rehabilitation Medicine Chengdu Jinniu District People’s HospitalChengdu 610000Sichuan ProvinceChina Department of Rehabilitation Medicine The General Hospital of the Western Theater Command of the People’s Liberation Army of ChinaChengdu 610000Sichuan ProvinceChina

BACKGROUND The precise mechanism by which severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)impacts the central nervous system remains unclear,with manifestations spanning from mild symptoms(e.g.,olfactory and gustatory deficits,hallucinations,and headache)to severe complications(e.g.,stroke,seizures,encephalitis,and neurally demyelinating lesions).The occurrence of single-pass subdural effusion,as described below,is extremely *** SUMMARY A 56-year-old male patient presented with left-sided limb weakness and slurred speech as predominant clinical *** comprehensive imaging and diagnostic assessments,he was diagnosed with cerebral infarction complicated by hemorrhagic transformation affecting the right frontal,temporal,and parietal *** addition,an intracranial infection with SARS-CoV-2 was identified during the rehabilitation process;consequently,an idiopathic subdural effusion ***,the subdural effusion underwent absorption within 6 d,with no recurrence observed during the 3-month *** Subdural effusion is a potentially rare intracranial complication associated with SARS-CoV-2 infection.

关键词： Cerebral infarction Hemorrhagic transformation Subdural effusion COVID-19 encephalopathy Novel coronavirus infection Brain fog Case report

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Transition to Amplitude Death in Coupled System with Small Number of Nonlinear Oscillators

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Communications in Theoretical Physics 2009年第3期51卷 460-464页

作者： CHEN Hai-ling YANG Jun-zhong School of Science Beijing University of Posts and Telecommunications Beijing 100876 China

In this work, we investigate the amplitude death in coupled system with small number of nonlinear oscillators. We show how the transitions to the partial and the complete amplitude deathes happen. We also show that th... 详细信息

关键词： coupled nonlinear oscillators amplitude death phase synchronization

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Coupling potential and viscous flow models with domain decomposition for wave propagations

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Journal of Hydrodynamics 2022年第5期34卷 826-848页

作者： Wen-jie zhong Wen-tao Wang De-cheng Wan Computational Marine Hydrodynamics Lab(CMHL) School of Naval ArchitectureOcean and Civil EngineeringShanghai Jiao Tong UniversityShanghai200240China China Ship Scientific Research Center Wuxi214082China

Either potential flow or viscous flow based model may be flawed for numerical wave *** two-way coupling of potential and viscous flow models with the domain decomposition utilizing respective strengths has been a trending research *** contrast to existing literatures in which closed source potential models were used,the widely used open source OceanWave3D,OpenFOAM-v2012 are used in the present *** innovative overlapping two-way coupling strategy is developed utilizing the ghost points in *** guarantee computational stability,a relaxation zone used both for outlet damping and data transfer is built over the overlapping region in *** free surface elevation in the relaxation zone is directly probed in OpenFOAM while the velocity potential is indirectly built upon its temporal variation which is calculated by the free surface boundary condition using the probed *** coupling is achieved based on the fourth-order Runge-Kutta(RK)*** two-and three-dimensional tests including linear,nonlinear,irregular,and multi-directional irregular waves,are *** effectiveness of the coupling procedure in bidirectional data transfer is fully demonstrated,and the model is validated to be accurate and efficient,thus providing a competitive alternative for ocean wave simulations.

关键词： Domain decomposition numerical wave tank potential/viscous flow coupling irregular waves wave-structure interaction

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