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Journal of Holistic Integrative Pharmacy 2023年第4期4卷 287-292页

作者： Xi Huang Quan Yang Hongyang Gao School of Chinese Materia Medica Guangdong Pharmaceutical University Guangzhou 510006 China Guangdong Provincial Research Center on Good Agricultural Practice & Comprehensive Agricultural Development Engineering Technology of Cantonese Medicinal Materials Guangzhou 510006 China Comprehensive Experimental Station of Guangzhou Chinese Material Medica China Agriculture Research System (CARS-21-16) Guangzhou 510006 China Key Laboratory of State Administration of Traditional Chinese Medicine for Production & Development of Cantonese Medicinal Materials Guangzhou 510006 China

MYB transcription factors (MYB TFs)are one of the largest families of transcription factors in plants, which are widely involved in various fields of plant growth and development, and play an important regulatory role in the biosynthesis of plant secondary metabolites. Most of the current studies on MYB transcription factors have focused on agricultural crops, and fewer studies have been conducted on medicinal plants. Therefore, this study reviews the research progress of plant MYB transcription factors in secondary metabolism of medicinal plants, which provides ideas and methods for better utilisation and development of medicinal plants.

关键词： MYB transcription factor Medicinal plants Secondary metabolism Research progress

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Large deformation and wrinkling analyses of bimodular structures and membranes based on a peridynamic computational framework

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Acta Mechanica Sinica 2019年第6期35卷 1226-1240页

作者： H.Li Y.G.Zheng Y.X.Zhang H.F.Ye H.W.Zhang Science and Technology on Reactor System Design Technology Laboratory Nuclear Power Institute of ChinaChengdu 610200China International Research Center for Computational Mechanics State Key Laboratory of Structural Analysis for Industrial EquipmentDepartment of Engineering MechanicsFaculty of Vehicle Engineering and MechanicsDalian University of TechnologyDalian 116024China

In this paper,the quasi-static large deformation,wrinkling and fracture behaviors of bimodular structures and membranes are studied with an implicit bond-based peridynamic computational ***,the constant and tangential stiffness matrices of the implicit peridynamic formulations for the nonlinear problems are derived,*** former is con structed from the linearization of the bond strain on the basis of the geometric approximation while the latter is established according to the linearization of the pairwise force by using first-order Taylor’s ***,a bimodular material model in peridynamics is developed,in which the tensile or compressive behavior of the material at each point is conveniently described by the tensile or compressive states of the bonds in its ***,the bimodular material model is extended to deal with the wrinkling and fracture problems of membranes by setting the compressive micro-modulus to be *** addition,the incremental-iterative algorithm is adopted to obtain the convergent solutions of the nonlinear ***,several representative numerical examples are presented and the results demonstrate the accuracy and efficiency of the proposed method for the large deformation,wrinkling and fracture analyses of bimodular structures and membranes.

关键词： Bimodular structures Wrinkling membranes Fracture problems Peridynamics Implicit numerical algorithm

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Three-Dimensional Numerical Simulation of Rime Ice Accumulation on Silicone Rubber Insulator and its Experimental Verification in the Natural Environment

SSRN

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SSRN 2022年

作者： Liu, Zongyuan Hu, Yuyao Jiang, Xingliang Wu, Ying Chi, Mingchen Han, Feiyan Wang, Xiaolei College of Electrical and Electronic Engineering Shandong University of Technology Zhangdian District Zibo255000 China State Key Laboratory of Power Transmission Equipment & System Security and New Technology Chongqing University Shapingba District Chongqing400044 China State Grid Weifang Hanting Electric Power Company Hanting District Weifang261100 China Shandong Huineng Electric Co. Ltd. Zibo255089 China

Icing on transmission lines is a challenging problem in the world. Rime icing on silicone rubber insulator was taken as research object in this paper. Based on the theories of computational fluid dynamics and collision dynamics, the position coordinates of supercooled water droplets collided with the surface of the insulator were extracted, the local collision coefficient (E) of the droplet was calculated by triangular area ratio method. The effectiveness of the method was verified by actual rime icing distribution. An ice shape reconstruction algorithm was proposed to realize three-dimensional numerical simulation of rime ice accretion on the insulator. Results show that E is the largest at the edge of the shed facing the flow direction, reaching 0.79. The median volume diameter of water droplet (MVD) has a greater impact on the E than wind speed (v). The length, thickness and amount of rime icing on the insulator calculated by the model increases with time, whose errors with that obtained by the tests are less than 12.82%, 15.78% and 14.07%, respectively. Moreover, the simulated icing distribution is well consistent with the experimental results. Therefore, the effectiveness of the numerical simulation method was proved in the present research. © 2022, The Authors. All rights reserved.

关键词： Computational fluid dynamics

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An ATP “Synthase” Derived from a Single Structural Domain of Bacterial Histidine Kinase

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Angewandte Chemie 2024年第13期136卷

作者： Shixia Ji Dr. Yuan Zhou Dr. Jiawen Chen Dr. Minghui Yang Dr. Conggang Li Dr. Maili Liu Dr. Yixiang Liu Dr. Ling Jiang Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology Wuhan 430074 China Key Laboratory of Magnetic Resonance in Biological System State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics National Center for Magnetic Resonance in Wuhan Innovation Academy for Precision Measurement Science and Technology Chinese Academy of Sciences Wuhan 430074 China

ATP (adenosine triphosphate) is a vital energy source for living organisms, and its biosynthesis and precise concentration regulation often depend on macromolecular machinery composed of protein complexes or complicated multidomain proteins. We have identified a single-domain protein HK853 CA derived from bacterial histidine kinases (HK) that can catalyze ATP synthesis efficiently. Here, we explored the reaction mechanism and multiple factors that influence this catalysis through a combination of experimental techniques and molecular simulations. Moreover, we optimized its enzymatic activity and applied it as an ATP replenishment machinery to other ATP-dependent systems. Our results broaden the understanding of ATP biosynthesis and show that the single CA domain can be applied as a new biomolecular catalyst used for ATP supply.

关键词： ATP synthesis histidine kinase catalysis protein NMR spectroscopy

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Changes in Mariculture and Offshore Seawater Quality in China During the Past 20 Years

SSRN

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SSRN 2023年

作者： Liu, Yueming Wang, Zhihua Yang, Xiaomei Wang, Shaoqiang Liu, Xiaoliang Liu, Bin Zhang, Junyao Meng, Dan Ding, Kaimeng Gao, Ku Zeng, Xiaowei Ding, Yaxin State Key Laboratory of Resources and Environmental Information System Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing100101 China University of Chinese Academy of Sciences Beijing100049 China Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing100101 China Jinling Institute of Technology Nanjing211169 China School of Geography and Information Engineering China University of Geosciences Wuhan430074 China School of Surveying and Land Information Engineering Henan Polytechnic University Jiaozuo454000 China

Mariculture can provide a large amount of food without occupying land resources, which provides important assistance for humans to achieve sustainable development. In this paper, China, where the output of mariculture exceeds half of the global output, is taken as the research area. Based on the spatial distribution data of three periods of mariculture along the coast of the Chinese Mainland in 2000, 2010, and 2020 obtained from remote sensing images and from the perspective of the mariculture center, the spatial development of mariculture in three periods in China is explored. By superposing water quality data from the same period, the relationship between the development of mariculture and water quality changes in China is explored. We found that (1) China’s mariculture exhibited a spatial distribution pattern of dense in the north and sparse in the south. (2) The development speed of mariculture was significantly higher in northern China than in southern China during the past 20 years. (3) The development mode of mariculture in China was mainly the formation of a new center. (4) Good seawater quality is a prerequisite for the formation of mariculture centers. (5) The deterioration of seawater quality is not conducive to the sustainable development of mariculture areas. (6) The formation of large-scale high-density mariculture centers does not necessarily lead to deterioration of the seawater quality. Furthermore, we found that the water depth is an important factor leading to the spatial distribution pattern of mariculture in China, i.e., dense in the north and sparse in the south. The flow velocity is an important factor determining the water quality changes in mariculture centers. © 2023, The Authors. All rights reserved.

关键词： Sustainable development

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Effects of microstructural heterogeneity on fatigue properties of cast aluminum alloys

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Journal of Central South University 2020年第3期27卷 674-697页

作者： JIAO Yi-nan ZHANG Yi-fan MA Shi-qing SANG De-li ZHANG Yang ZHAO Jin-jin WU Sheng-chuan LIU Yong-qiang YANG Shao-pu School of Materials Science and Engineering Hebei Key Laboratory for Mechanics of Intelligent Materials and StructuresShijiazhuang Tiedao UniversityShijiazhuang 050043China State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures Shijiazhuang Tiedao UniversityShijiazhuang 050043China School of Mechanical Engineering Shijiazhuang Tiedao UniversityShijiazhuang 050043China State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao 066004China State Key Laboratory of Traction Power Southwest Jiaotong UniversityChengdu 610031China

Cast Al alloys are widely employed for engine components,structural parts,gear box,chassis,*** subjected to mechanical cyclic load during *** accurate fatigue life prediction of these alloys is essential for normal operation as fatigue cracks initiated during operation induce the lubrication oil leak and serious safety *** heterogeneity,including shrinkage/gaspores and secondary phase particles,is the most detrimental factor that affects fatigue life of cast Al *** approximate fatigue life cycles could be estimated based on the size distribution and locations of shrinkage pores/*** relationship between crack population and stress was reported by statistical distributions and the cumulative probability for cast Al alloys fail at a certain stress could be predicted by combination of Paris law and pore size *** depth was found to dominate the stress field around the pore on the surface and the maximum stress increases sharply when the pore intercepted with the surface at its *** microstructure of cast Al alloys usually is composed of primary Al dendrites,eutectic silicon,Fe-rich particles and other intermetallic particles are dependent upon alloy composition and heat *** coalescence of microcracks initiated from the fractured secondary phases was clearly found and can accelerate the initiation and propagation of the fatigue cracks.A link between defect features and the fatigue strength needs to be established through a good understanding of the fatigue damage mechanisms associated with the microstructural features under specific loading *** paper reviews the influences of shrinkage/gaspores and secondary phase particles,formed during casting process,on the fatigue life of Al-Si-Mg cast Al alloys.

关键词： cast aluminum alloys fatigue microstructural heterogeneous shrinkage/gas pore secondary phase particles

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Contributions to the Interannual Summer Rainfall Variability in the Mountainous Area of Central China and Their Decadal Changes

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Advances in Atmospheric Sciences 2020年第3期37卷 259-268页

作者： Kaiming HU Yingxue LIU Gang HUANG Zhuoqi HE Shang-Min LONG Center for Monsoon System Research Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China State key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Joint Center for Global Change Studies(JCGCS) Beijing 100875China University of Chinese Academy of Sciences Beijing 100049China Laboratory for Regional Oceanography and Numerical Modeling Qingdao National Laboratory for Marine Science and TechnologyQingdao 266237China State Key Laboratory of Tropical Oceanography South China Sea Institute of OceanologyChinese Academy of SciencesGuangzhou 510301China College of Oceanography Hohai UniversityNanjing 210098China

Using a high-resolution precipitation dataset,the present study detected that the mountainous area of central China(MACA)is a hotspot of ENSO’s impact on the summer rainfall *** analysis suggests that both ENSO and atmospheric forcing make contributions to the summer rainfall variability in *** dominant rainfall-related SST mode features as a seasonal transition from an El Niño-like warming in the preceding winter to a La Nina-like cooling in the following autumn,and it explains about 29%of the total variance of the rainfall during 1951–*** indicates that ENSO with a rapid phase transition is responsible for inducing summer rainfall anomalies in ***,an upperlevel circumglobal wave mode in the Northern Hemisphere during summer also explains about 29%of the summer rainfall *** of both the SST and the atmospheric modes have experienced interdecadal *** influence of the SST mode gradually increases and plays a dominant role in the recent decades,suggesting that ENSO with a rapid phase transition becomes more important for rainfall prediction in MACA.

关键词： summer rainfall ENSO atmospheric internal variability interdecadal change

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Fault Location Method for μPMU-Based Distribution Networks

Fault Location Method for μPMU-Based Distribution Networks

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Electrical Engineering and Automation (IFEEA), International Forum on

作者： Lei Wang Lin Niu Fengyuan Zhou Zhanjun Gao Power Grid Maintenance Training Department State Grid of China Technology College Jinan China Key Laboratory of Power System Intelligent Dispatch and Control Ministry of Education Shandong University Jinan China

With the development of communication technology and the wide-area measurement system, the prospect of incorporating active distribution networks (ADNs) with micro phasor measurement units (μPMUs) to obtain integrated system information for state estimation and fault location, is becoming increasingly promising. This paper presents a fault location method for ADNs with finite μPMUs. First, the configuration of the μPMUs is optimized to ensure that the entire distribution network is considered and that the global phasor information can be comprehensively utilized. The fault section detection criterion for the unbalanced current component amplitude comparison, is used to locate the fault. Utilizing PSCAD/EMTDC and MATLAB, it is verified that this method is not affected by the fault location and is suitable for multi-type faults and extreme disturbance. This method exhibits a high resilience to transition resistance and is robust when employed in the improved IEEE 33-node test system.

关键词： Resistance Distribution networks Fault location Phasor measurement units Permeability Wide area measurements state estimation

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Research on Output Scenarios of Offshore Wind Power Considering Characteristics of Marine Weather 14

Research on Output Scenarios of Offshore Wind Power Consider...

引用

14th International Conference on Computer and Electrical Engineering, ICCEE 2021

作者： Chen, Honglin Chen, Xing Yu, Hao Lou, Suhua Lin, Yong Xu, Liang Power System Planning Research Center of Guangdong Power Grid Co. Ltd. Guangdong Province Guangzhou510080 China State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Hubei Province Wuhan430074 China China-EU Institute for Clean and Renewable Energy Huazhong University of Science and Technology Hubei Province Wuhan430074 China Guangdong Power Grid Co. Ltd. Guangdong Province Guangzhou510080 China

Accurate modeling of stochastic wind power output is one of the key links in the optimal operation of power systems with large-scale wind power. According to the output characteristics of offshore wind farms, a data-driven method that models offshore wind power output scenarios is proposed in this paper. This method takes full account of the marine climate characteristics to study the offshore wind farm output data seasonally and identifies the main climatic elements affecting the output of offshore wind farms through correlation analysis. Meanwhile, the evaluation index of output characteristics is established. In order to reflect the influence of marine climate on the output of offshore wind farms, the climatic factors are used as an indicator to distinguish different weather. Accordingly, the output scenarios of offshore wind farms in extreme and non-extreme weather are determined, and the corresponding probability calculation method is proposed. © Published under licence by IOP Publishing Ltd.

关键词： Offshore wind farms

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Single-atom anchored novel two-dimensional MoSi2N4 monolayers for efficient electroreduction of CO2 to formic acid and methane

arXiv

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arXiv 2022年

作者： Xun, Wei Yang, Xiao Jiang, Qing-Song Wang, Ming-Jun Wu, Yin-Zhong Li, Ping Faculty of Electronic Information Engineering Huaiyin Institute of Technology Huaian223003 China School of Automation and Information Engineering Xi’an University of Technology Shaanxi Xi’an710048 China School of Physical Science and Technology Suzhou University of Science and Technology Suzhou215009 China State Key Laboratory for Mechanical Behavior of Materials Center for Spintronics and Quantum System School of Materials Science and Engineering Xi’an Jiaotong University Shaanxi Xi’an710049 China

Efficient and selective CO2 electroreduction into value-added chemicals and fuels emerged as a significant approach for CO2 conversion, however, it relies on catalysts with controllable product selectivity and reaction paths. In this work, by means of first-principles calculations, we identify five catalysts (TM@MoSi2N4, TM = Sc, Ti, Fe, Co and Ni) comprising transition-metal atoms anchored on a MoSi2N4 monolayer, whose catalytic performance can be controlled by adjusting the d-band center and occupation of supported metal atoms. During CO2 reduction, the single metal atoms function as the active sites activates the MoSi2N4 inert basal-plane, and as-designed electrocatalysts exhibit excellent activity in CO2 reduction. Interestingly, HCOOH is the preferred product of CO2 reduction on the Co@MoSi2N4 catalyst with a rate-determining barrier of 0.89 eV, while the other four catalysts prefer to reduce CO2 to CH4 with a rate-determining barrier of 0.81-1.24 eV. Moreover, MoSi2N4 is an extremely-air-stable material, which will facilitate its application in various environments. Our findings provide a promising candidate with high activity, catalysts for renewable energy technologies, and selectivity for experimental work. © 2022, CC BY.

关键词： Density functional theory

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