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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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An application of network modeling method to scientific research and demonstration platform-Connector load analysis

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Journal of Hydrodynamics 2021年第1期33卷 33-42页

作者： Rui Ding Du-lei Yan hai-cheng Zhang Ye Lu Qi-jia Shi Chao Tian Jia-le Zhang xin-yun ni Dao-lin Xu You-sheng Wu College of Mechanical and Vehicle Engineering Hunan UniversityChangsha 410082China China Ship Scientific Research Center Wuxi 214082China

A new approach referred as“the network modeling method”was developed by the authors to analyze the behaviors of marine *** this paper the method is briefly described and applied to predict the loads acting on the connectors between the two modules of the Scientific Research and Demonstration Platform(SRDP),which was deployed in a complicated wave environment near islands and reefs in South China *** on this method,the response amplitude operators(RAOs)of the connector loads of the SRDP in regular waves,and the time variations of the connector loads of the SRDP in an on-site measured random sea state are predicted and *** significant stresses at 20 spots of the local connection structure induced by the connector loads in the sea state are further *** comparisons between the predicted and the on-site measured stresses confirm that the network modeling method is feasible to some extent and especially useful for design of the connectors’arrangement,estimation of the connector loads and the related structural safety of a multi-module floating structure in early design stage.

关键词： Network modeling method wave loads hinge type connector on-site measurements Scientific Research and Demonstration Platform(SRDP)

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A Stackelberg Game for Spectrum Leasing in Cooperative Cognitive Radio Networks

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International Journal of Automation and computing 2013年第2期10卷 125-133页

作者： Xiao-Cheng Wang xin-Ping Guan Qiao-ni Han Zhi-xin Liu Kai Ma Institute of Electrical Engineering Key Laboratory of Industrial Computer Control Engineering of Hebei Province Yanshan University School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University

According to the property-rights model of cognitive radio, primary users （PUs） who own the spectrum resource have the right to lease part of spectrum to secondary users （SUs） in exchange for appropriate profit. In this paper, we propose a pricing-based spectrum leasing framework between one PU and multiple SUs. In this scenario, the PU attempts to maximize its utility by setting the price of spectrum. Then, the selected SUs have the right to decide their power levels to help PU s transmission, aiming to obtain corresponding access time. The spectrum leasing problem can be cast into a stackelberg game, where the PU plays the seller-level game and the selected SUs play the buyer-level game. Through analysis based on the backward induction, we prove that there exists a unique equilibrium in the stackelberg game with certain constraints. Numerical results show that the proposed pricing-based spectrum leasing framework is effective, and the performance of both PU and SUs is improved, compared to the traditional mechanism without cooperation.

关键词： Cognitive radio spectrum leasing power control cooperative transmission pricing stackelberg game

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Cytotoxic diaporindene and tenellone derivatives from the fungus Phomopsis lithocarpus

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Chinese Journal of Natural Medicines 2021年第11期19卷 874-880页

作者： LIU Hui-Bo LIU Zhao-Ming CHEN Yu-Chan Tan hai-Bo LI Sai-ni LI Dong-Li LIU Hong-xin ZHANG Wei-Min State Key Laboratory of Applied Microbiology Southern China Guangdong Provincial Key Laboratory of Microbial Culture Collection and ApplicationGuangdong Open Laboratory of Applied MicrobiologyInstitute of MicrobiologyGuangdong Academy of SciencesGuangzhou 510070China School of Chemical and Environmental Engineering Wuyi UniversityJiangmen 529020China Program for Natural Products Chemical Biology Key Laboratory of Plant Resources Conservation and Sustainable UtilizationGuangdong Provincial Key Laboratory of Applied BotanySouth China Botanical GardenChinese Academy of SciencesGuangzhou 510650China

nine new compounds,including five natural rarely-occurring 2,3-dihydro-1H-indene derivatives named diaporindenes E−I(1−5),and four new benzophenone analogues named tenellones J−M(6−9)were isolated from the deep-sea sediment-derived fungus Phomopsis lithocarpus *** the structures for these new compounds were fully characterized on the basis of spectroscopic data,NMR spectra,and ECD calculation and single-crystal X-ray diffraction *** potential anti-tumor activities of compounds 1−9 against four tumor cell lines SF-268,MCF-7,HepG-2,and A549 were evaluated using the SRB *** 7 exhibited cytotoxic activity against the SF-268 cell line with an IC50 value of 11.36μmol·L^(−1).

关键词： Deep-see-derived fungus Phomopsis lithocarpus 2 3-Dihydro-1H-indene isomers Benzophenone derivatives

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Efficient Anti-Glare Ceramic Decals Defect Detection by Incorporating Homomorphic Filtering

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Computer Systems Science & Engineering 2021年第3期36卷 551-564页

作者： xin Chen Ying Zhang Lang Lin Junxiang Wang Jiangqun ni Southeast Digital Economic Development Institute Quzhou324000China School of Mechanical and Electronic Engineering Jingdezhen Ceramic InstituteJingdezhen333400China School of Data and Computer Science Sun Yat-Sen UniversityCanton510000China

Nowadays the computer vision technique has widely found applicationsin industrial manufacturing process to improve their efficiency. However, it ishardly applied in the field of daily ceramic detection due to the following twokey reasons: (1) Low detection accuracy as a result of ceramic glare, and (2) Lackof efficient detection algorithms. To tackle these problems, a homomorphic filtering based anti-glare ceramic decals defect detection technique is proposed in thispaper. Considering that smooth ceramic surface usually causes glare effects andleads to low detection results, in our approach, the ceramic samples are takenin low light environment and their luminance and details restored by a homomorphic filtering based image enhancement technique. With relatively high quality preprocessed images, an effective ceramic decal defect detection algorithm isthen designed to rapidly locate those out-of-bounds defects and further estimatetheir size. The experimental results show that the proposed scheme could achieveits desired performance.

关键词： Ceramic glaring homomorphic filtering ceramic decal border extraction out-of-bounds detection

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Low-Complexity Joint Channel Estimation and Symbol Detection for OFDMA Systems

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China Communications 2019年第7期16卷 49-60页

作者： Rui xin Zuyao ni Sheng Wu Linling Kuang Chunxiao Jiang Department of Aerospace Engineering Tsinghua University Beijing 100084 China Tsinghua Space Center Tsinghua University Beijing 100084 China Key Laboratory of Universal Wireless Communication Ministry of Education Beijing University of Posts and Telecommunications Beijing 100876 China Beijing National Research Center for Information Science and Technology Beijing 100084 China

In this paper,we propose a joint channel estimation and symbol detection(JCESD)algorithm relying on message-passing algorithms(MPA)for orthogonal frequency division multiple access(OFDMA)*** channel estimation and symbol detection leverage the framework of expectation propagation(EP)and belief propagation(BP)with the aid of Gaussian approximation,***,to reduce the computation complexity involved in channel estimation,the matrix inversion is transformed into a series of diagonal matrix inversions through the Sherman-Morrison *** experiments show that the proposed algorithm can reduce the pilot overhead by about 50%,compared with the traditional linear minimum mean square error(LMMSE)algorithm,and can approach to the bit error rate(BER)performance bound of perfectly known channel state information within 0.1 dB.

关键词： joint channel estimation and symbol detection message passing OFDMA

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Additive effects on tin electrodepositing in acid sulfate electrolytes

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International Journal of Minerals,Metallurgy and Materials 2013年第5期20卷 472-478页

作者： Fa-xin Xiao Xiao-ni Shen Feng-zhang Ren Alex A. Volinsky School of Materials Science and Engineering Henan University of Science and Technology Department of Mechanical Engineering University of South Florida

The effects of additives on the stannous reduction of an acid sulfate bath were investigated using cyclic and linear sweep voltammetry, electrochemical impedance spectroscopy （EIS）, and microstructure analysis. In the absence of additives, tin coatings are rough, and the tin electrodepositing is a single-step reduction process accompanied by hydrogen gas evolution. The addition of tartaric acid produces a slight reduction in the peak current of stannous reduction and has an appreciably positive effect on the stability of the acidic tin bath. Both benzylidene acetone and polyoxyethylene octylphenol ether hinder the stannous reduction and greatly suppress the hydrogen gas evolution. Formaldehyde slightly decreases the peak current density of stannous reduction and serves as an auxiliary brightener in the acid sulfate bath. The presence of mixed additives greatly suppresses the stannous reduction and hydrogen gas evolution and consequently produces a significantly smoother and denser tin coating. The （112） crystal face is found to be the dominant and preferred orientation of tin deposits.

关键词： electrodepositing tin additives stannous reductiOn

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Memory Trace for Fear Extinction:Fragile yet Reinforceable

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Neuroscience Bulletin 2024年第6期40卷 777-794页

作者： Ying Liu Shuai Ye xin-ni Li Wei-Guang Li Department of Rehabilitation Medicine State Key Laboratory of Medical Neurobiology and Ministry of Education Frontiers Center for Brain ScienceHuashan HospitalInstitute for Translational Brain ResearchFudan UniversityShanghai200032China

Fear extinction is a biological process in which learned fear behavior diminishes without anticipated reinforcement,allowing the organism to re-adapt to ever-changing *** on the behavioral hypothesis that extinction is new learning and forms an extinction memory,this new memory is more readily forgettable than the original fear *** brain’s cellular and synaptic traces underpinning this inherently fragile yet reinforceable extinction memory remain *** questions are about the whereabouts of the engram neurons that emerged during extinction learning and how they constitute a dynamically evolving functional construct that works in concert to store and express the extinction *** this review,we discuss recent advances in the engram circuits and their neural connectivity plasticity for fear extinction,aiming to establish a conceptual framework for understanding the dynamic competition between fear and extinction memories in adaptive control of conditioned fear responses.

关键词： Fear extinction memory Memory trace Fear relapse Medial prefrontal cortex Basolateral amygdala Ventral hippocampus Insular cortex Synaptic adaptations

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Model for cascading network failures based on the nodes with different tolerance parameter

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The Journal of China Universities of Posts and Telecommunications 2011年第5期18卷 95-101页

作者： LIU Yuan-ni LI xin CHEN Shan-zhi QIN Zhen State key Lab of Switching and Networking Technology Beijing University of Posts and Telecommunications Beijing 100876 China State key Lab of W1reless Mobile Communication China Academy of Telecommunication Technology Beijing 100083 China School of Lifesciences and Technology Xidian University Xi＇an 710126 China

Cascading failures are common in most of the networks, where traffic is rerouted to bypass malfunctioning routers, eventually leading to an avalanche of overloads on other routers that are not equipped to handle extra traffic, which can result in a congestion regime with degradation in the network performance. In order to investigate how a small shock can trigger avalanches mechanisms affecting a considerable fraction of the network, lots of failure models have been constructed, but they have focused only on the static properties of the network that can not reflect the performance affected by the avalanche exactly. In this paper, we proposed a simple model for cascading failures in the network to explore how the failures can have a great impact on the network performance, and we allocated every node a capacity by tolerance parameter based on the node importance, which is determined by node degree, the number of the shortest paths through a node, and the number of the shortest paths through the neighbors of a node, then we fixed every element a weight to compute the node importance by analytic hierarchy process （AHP） theory. Based on our model, we analyzed the influence of different types of attacks to the network performance, and also tabled some proposals for reducing the damage that the networks suffered from the cascading failures.

关键词： cascading failure power-law tolerance parameter network efficiency

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Synthesis of a Kind of Temperature-responsive Cell Culture Surface for Corneal Sheet

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Journal of Materials Science & Technology 2010年第12期26卷 1119-1126页

作者： Yanqing Guan Zhibin Li xin Wang Xiaoli ni Aini Yang Junming Liu School of Life Science South China Normal University Guangzhou 510631 China School of Physics South China Normal University Guangzhou 510631 China Laboratory of Solid State Microstructures Nanjing University Nanjing 210093 China International Center for Materials Physics Chinese Academy of Sciences Shenyang 110016 China

In this study, acrylic acid （AA） and 4-azidoaniline were used to modify poly （N-isopropylacrylamide）（niPAAm） in order to fabricate temperature-responsive surface for corneal epithelia cell adhesion and detachment. First, niPAAm was copolymerized with acrylic acid. Then, the copolymer was coupled with azidoaniline to synthesize AzPhPIA, derivative of p（niPAAm-co-AA）, which possesses both thermo- and photo-sensitivities. Second, the synthesized copolymer was characterized by high performance liquid chromatography （HPLC）, Fourier transform infrared （FTIR） and a CHN analyzer. The thermo-sensitivity was characterized by temperature reducing experiment, contact angle measurement and low critical solution temperature （LCST） testing. Third, the derivatized copolymer was immobilized by photolithography on a polystyrene plate, and then the surface characterization of AzPhPIA-coated polystyrene plate （PSt） was measured by electron spectroscopy for chemical analysis （ESCA）. The thermo-sensitivity and cytocompatibility of the AzPhPIA-coated PSt were investigated by corneal epithelial cells culture. The results revealed that the AzPhPIA-coated PSt exhibited good cytocompatibility and cell detachability when temperature decreased.

关键词： N-isopropylacrylamide Low critical solution temperature Tissue engineering Corneal epithelial cells

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