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Activity promotion of Rh_(1)Ca_(x)/Al_(2)O_(3) single-atom catalyst in 1-octene hydroformylation:a volcano curve exists between Ca adding ratio and catalytic activity

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science China Chemistry 2024年第4期67卷 1187-1192页

作者： Hao Zhang Xingcong Zhang Xilun Wang Qingdi Sun Hao Liu Hongbing Ji Xiaohui He key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education Fine Chemical Industry Research InstituteSchool of ChemistryIGCMESun Yat-sen UniversityGuangzhou 510275China Huizhou Research Institute Sun Yat-sen UniversityHuizhou 516081China State key Laboratory Breeding Base of Green-Chemical Synthesis Technology Institute of Green Petroleum Processing and Light Hydrocarbon ConversionCollege of Chemical EngineeringZhejiang University of TechnologyHangzhou 310014China

Single-atom catalysts(SACs)are considered the best candidates for olefin hydroformylation due to their combined advantages of homogeneous and heterogeneous *** conventional organo-phosphine modification,Rh SAC is modified by introducing Ca,resulting in a significant increase in activity(maximum~5.7-fold)and ***,a volcano curve between Ca addition ratio and catalytic activity is *** Ca significantly increases activity by decreasing the energy barrier,but excessive Ca decreases activity due to hindering substrate adsorption and reaction.

关键词： hydroformylation bimetallic single-atom catalysts rhodium heterogeneous catalyst

THE GLOBAL EXISTENCE AND ANALYTICITY OF A MILD SOLUTION TO THE 3D REGULARIZED MHD EQUATIONS

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Acta Mathematica Scientia 2024年第3期44卷 973-983页

作者：肖存涛邱华姚正安 School of Mathematics and Statistics Guangdong University of TechnologyGuangzhou510090China Department of Mathematics South China Agricultural UniversityGuangzhou510642China School of Mathematics Sun Yat-sen UniversityGuangzhou510275China

In this paper,we study the three-dimensional regularized MHD equations with fractional Laplacians in the dissipative and diffusive *** establish the global existence of mild solutions to this system with small initial... 详细信息

关键词： regularized MHD equations fractional Laplacian global well-posedness analyticity decay rate

3D-printed MoS_(2)/Ni electrodes with excellent electro-catalytic performance and long-term stability for dechlorination of florfenicol

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Journal of Environmental sciences 2024年第3期137卷 420-431页

作者： Jianhui Xu Pengxu Wang Shenggui Chen Lei Li Dan Li Yunfei Zhang Qi Wu Jinhong Fan LumingMa School of Environment and Civil Engineering Dongguan University of TechnologyDongguan 523808China School of Art and Design Guangzhou Panyu PolytechnicGuangzhou 511483China National Engineering Research Center for Urban Pollution Control State Key Laboratory of Pollution Control and Resources ReuseCollege of Environmental Science and EngineeringTongji UniversityShanghai 200092China Dongguan Institute of science and Technology Innovation Dongguan University of TechnologyDongguan 523808China School of Mechanical Engineering Dongguan University of TechnologyDongguan 523808China

Here,we report the production of 3D-printed MoS_(2)/Ni electrodes(3D-MoS_(2)/Ni)with longterm stability and excellent performance by the selective laser melting(SLM)*** a cathode,the obtained 3D-MoS_(2)/Ni could maintain a degradation rate above 94.0%for forfenicol(FLO)when repeatedly used 50 times in *** also found that the removal rate of FLO by 3D-MoS_(2)/Ni was about 12 times higher than that of 3D-printed pure Ni(3D-Ni),attributed to the improved accessibility of H^(*).In addition,the electrochemical characterization results showed that the electrochemically active surface area of the 3D-MoS_(2)/Ni electrode is about 3-fold higher than that of the 3D-Ni electrode while the electrical resistance is 4 times *** on tert-butanol suppression,electron paramagnetic resonance and triple quadrupole mass spectrometer experiments,a“dual path”mechanism and possible degradation pathway for the dechlorination of FLO by 3D-MoS_(2)/Ni were ***,we also investigated the impacts of the cathode potential and the initial pH of the solution on the degradation of ***,this study reveals that the SLM 3D printing technique is a promising approach for the rapid fabrication of high-stability metal electrodes,which could have broad application in the control of water contaminants in the environmental field.

关键词： 3D-print Electroreduction MoS_(2)/Ni Antibiotic Florfenicol

Style-conditioned music generation with Transformer-GANs

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Frontiers of Information Technology & Electronic Engineering 2024年第1期25卷 106-120页

作者： Weining WANG Jiahui LI Yifan LI Xiaofen XING School of Electronic and Information Engineering South China University of TechnologyGuangzhou 510600China

Recently,various algorithms have been developed for generating appealing ***,the style control in the generation process has been somewhat *** style refers to the representative and unique appearance presented by a musical work,and it is one of the most salient qualities of *** this paper,we propose an innovative music generation algorithm capable of creating a complete musical composition from scratch based on a specified target style.A style-conditioned linear Transformer and a style-conditioned patch discriminator are introduced in the *** style-conditioned linear Transformer models musical instrument digital interface(MIDI)event sequences and emphasizes the role of style ***,the style-conditioned patch discriminator applies an adversarial learning mechanism with two innovative loss functions to enhance the modeling of music ***,we establish a discriminative metric for the first time,enabling the evaluation of the generated music’s consistency concerning music *** objective and subjective evaluations of our experimental results indicate that our method’s performance with regard to music production is better than the performances encountered in the case of music production with the use of state-of-the-art methods in available public datasets.

关键词： Music generation Style-conditioned Transformer Music emotion

Bimolecular reduction of carbon dioxide: double synthons for alkynes trifunctionalization

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science China Chemistry 2024年第3期67卷 841-847页

作者： Wenfang Xiong Xiaobin Tan Hongjian Liu Baiyao Zhu Jinwu Zhao Jianxiao Li Chaorong Qi Huanfeng Jiang School of Pharmacy Guangdong Medical UniversityDongguan 523808China key Lab of Functional Molecular Engineering of guangdong province School of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhou 510640China

Carbon dioxide reduction, as a sustainable and versatile strategy for the access of chemical fuels, has attracted increasing attention and enormous efforts have been devoted to it in recent years. However, employing carbon dioxide as double synthons via bimolecular reduction remains challenging. Here, by leveraging the bimolecular reduction of carbon dioxide to carbonyl and methyl respectively, we describe a Pd-catalyzed trifunctionalization of alkynes with aryl iodide for the first time and showcase its advantages on the formation of various β-diketones and their application in the constructing of heterocyclic compounds with important biological activity, including pyrimidine, oxazole, pyrazole.

关键词： carbon dioxide bimolecular reduction trifunctionalization double synthons

Drug delivery with Mn-doped MoO_(2) for photothermalenhanced chemotherapy in fighting cancers

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Rare Metals 2024年第5期43卷 2230-2240页

作者： Ping Zhao Hai-Fa Zheng Ju Peng Xing-Long Li Fazal Raziq Xiao-Jun Liu Hao-Quan Yu Jin-Lu Tang Yi-Fan Kang Wen-Huan Huang School of Chemistry and Chemical Engineering Guangdong Pharmaceutical UniversityGuangzhou 510006China KAUST Catalysis Center King Abdullah University of Science and Technology23955-6900 ThuwalKingdom of Saudi Arabia key Laboratory of Chemical Additives for China National Light Industry College of Chemistry and Chemical EngineeringShaanxi University of Science and TechnologyXi'an 710021China

Although chemotherapy has been intensively applied in cancer treatments,its inadequate therapeutic efficacy and severe side effects are still under constant *** used as anti-tumor drug delivery system(DDS)have attracted tremendous attentions owing to their various intriguing ***,Mn-doped MoO_(2)nanoparticles coated with ZrO_(2)and capped with Bi_(2)O_(3)have been designed as a DDS,namely *** possesses good magnetic properties,great photothermal conversion ability,sensitive tumor microenvironment(TME)responsiveness,and good biocompatibility in hemocompatibility in ***,MMZB has been utilized to load the chemotherapeutic agent daunomycin(DNM)(MMZB@DNM)for chemo-photothermal combined ***@DNM demonstrates a more impressive anti-cancer effect than the individual photothermal or chemotherapy both in vitro and in ***,the analysis of tumor specimen sections and serum levels after the treatment indicates negligible side effects for MMZB@DNM in *** contribution provides a valuable concept in designing therapeutic agents for achieving significantly enhanced tumor treatments,which benefits from the synergistic combination of chemotherapy and photothermal therapy in one single nanoagent.

关键词： Mn-doped MoO_(2) Bi_(2)O_(3) Nanocarrier Photothermal Chemotherapy

Location of Asymmetric Ground Fault Using Virtual Injected Current Ratio and Two-stage Recovery Strategy in Distribution Networks

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CSEE Journal of Power and Energy Systems 2024年第1期10卷 151-161页

作者： Haiting Shan Luliang Zhang Q.H.Wu Mengshi Li School of Electric Power Engineering South China University of Technology(SCUT)Guangzhou 510641China

Sparse measurements challenge fault location in distribution *** paper proposes a method for asymmetric ground fault location in distribution networks with limited measurements.A virtual injected current vector is formulated to estimate the fault line,which can be reconstructed from voltage sags measured at a few buses using compressive sensing(CS).The relationship between the virtual injected current ratio(VICR)and fault position is deduced from circuit analysis to pinpoint the ***,a two-stage recovery strategy is proposed for improving reconstruction accuracy of the current vector,where two different sensing matrixes are utilized to improve the *** proposed method is validated in IEEE 34 node test *** results show asymmetric ground fault type,resistance,fault position and access of distributed generators(DGs)do not significantly influence performance of our *** addition,it works effectively under various scenarios of noisy measurement and line parameter *** on 134 node test feeders prove the proposed method is also suitable for systems with more complex structure.

关键词： Distribution networks fault location reconstruction accuracy two-stage recovery virtual injected current ratio

Probing nickelate superconductors at atomic scale: A STEM review

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CHINESE PHYSICS B 2024年第9期33卷 2-11页

作者： Lei, Yihan Wang, Yanghe Song, Jiahao Ge, Jinxin Wu, Dirui Zhang, Yingli Li, Changjian Southern Univ Sci & Technol Dept Mat Sci & Engn Shenzhen 518055 Peoples R China Southern Univ Sci & Technol Guangdong Prov Key Lab Funct Oxide Mat & Devices Shenzhen 518055 Peoples R China

The discovery of nickelate superconductors, including doped infinite-layer (IL) nickelates RNiO2 (R = La, Pr, Nd), layered square-planar nickelate Nd6Ni5O12, and the Ruddlesden-Popper (RP) phase La3Ni2O7, has spurred immense interest in fundamental research and potential applications. Scanning transmission electron microscopy (STEM) has proven crucial for understanding structure-property correlations in these diverse nickelate superconducting systems. In this review, we summarize the key findings from various modes of STEM, elucidating the mechanism of different nickelate superconductors. We also discuss future perspectives on emerging STEM techniques for unraveling the pairing mechanism in the "nickel age" of superconductivity.

关键词： scanning transmission electron microscopy superconductivity epitaxial thin films nickelates 68.37.Ma 74.25.Dw 81.30.Dz 79.20.Uv LANIO3 PEROVSKITE REDUCED FORMS RECONSTRUCTION INTERFACE

Liquid Crystal Based Label-Free Optical Sensors forBiochemical Application

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Photonic Sensors 2024年第2期14卷 57-88页

作者： Jieyuan TANG Zhibin LI Mengyuan XIE Yunhan LUO Jianhui YU Guojie CHEN Zhe CHEN School of Physics and Optoelectronic Engineering Foshan UniversityFoshan 528225China guangdong-Hong Kong.Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology Foshan UniversiyFoshan 528225China key Laboratory of Optoelectronic Information and Sensing Technologies of guangdong Higher Education Institutes Jinan UniversityGuangzhou 510632.China Department of Optoelectronic Engineering Jinan UniversityGuangzhou 510632China JiHua Laboratory Foshan 528200China

Biochemical sensors have important applications in biology,chemistry,and ***,many biochemical sensors are hampered by intricate techniques,cumbersome procedures,and the need for *** the past two decades,it has been discovered that liquid crystals can be used to achieve the optical amplification of biological *** modifying recognition molecules,a variety of label-free biochemical sensors can be ***,biochemical sensors based on the amplification of liquid crystals have become one of the most promising *** paper describes in detail the optical sensing principle of liquid crystals,sensing devices,and optical detection ***,the latest research findings are ***,the challenges and future research directions are discussed.

关键词： Optical sensor biochemistry liquid crystal label-free