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PTO系统阻尼参数对新型风浪能联合利用装置发电性能的影响

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江苏科技大学学报（自然科学版） 2023年第4期37卷 1-9页

作者：李宇萌 muk chen ong 王凯李良碧江苏科技大学船舶与海洋工程学院镇江212100 挪威斯塔万格大学机械结构工程与材料科学学院挪威斯塔万格4036 中山大学海洋工程与技术学院珠海519082 南方海洋科学与工程广东省实验室珠海519082

为了降低能源成本,提高海上风电场的发电量,提出一种新型风浪能联合利用装置,由半潜型水平轴浮式风机(HAWT)和4个环形波浪能转换器(WEC)构成,利用波浪能转换器环面和半潜平台立柱之间的相对垂荡运动来收集波浪能.综合考虑风机的控制器... 详细信息

为了降低能源成本,提高海上风电场的发电量,提出一种新型风浪能联合利用装置,由半潜型水平轴浮式风机(HAWT)和4个环形波浪能转换器(WEC)构成,利用波浪能转换器环面和半潜平台立柱之间的相对垂荡运动来收集波浪能.综合考虑风机的控制器、波浪能转换器以及叶片上的气动载荷、平台上的水动力载荷和系泊载荷,建立该联合装置的全耦合分析模型.由于波浪能装置的PTO(power take-off)动力输出装置的阻尼参数B_(PTO)将直接决定波浪能装置的能量转换效率,因此,以北海海况为背景,分析了运行海况下4种不同参数B_(PTO)设置方案对发电性能的影响.结果表明,此种新型风机波浪能转换器联合装置可有效提高单位发电量.且当4个波浪能转换器采用参数B_(PTO)为2000(kN·s)/m的方案时,此联合装置的年发电量在4种B_(PTO)参数设置方案中最大.

关键词：半潜式风机波浪能转换器 B PTO参数年发电量

Apolipoprotein E elicits targetdirected miRNA degradation to maintain neuronal integrity

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Neural Regeneration Research 2025年第9期20卷 2577-2578页

作者： Jiazi Tan Chin-Tong ong Temasek Life Sciences Laboratory National University of SingaporeSingapore Department of Biological Sciences National University of SingaporeSingapore

Apolipoprotein E has diverse functions in neurons:Apolipoprotein E(ApoE)is a glycoprotein that primarily regulates lipid metabolism and transport in the central nervous *** are three predominant human ApoE protein isoforms with cysteine and arginine substitutions at amino acid positions 112 and 158 that impact their lipidation and related functions(Flowers and Rebeck,2020).ApoE2 is characterized by Cys112 and Cys158,ApoE3 by Cys112 and Arg158,whereas ApoE4 contains Arg112 and Arg158.

关键词： metabolism glycoprotein maintain

Extreme Responses of An Integrated System with A Semi-Submersible Wind Turbine and Four Torus-Shaped Wave Energy Converters in Different Survival Modes

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China Ocean Engineering 2024年第5期38卷 877-892页

作者： WANG Kai LI Yu-meng ong muk chen WAN Ling LI Liang-bi chenG Zhengshun School of Ocean Engineering and Technology Sun Yat-sen University&Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)Zhuhai 519082China School of Naval Architecture and Ocean Engineering Jiangsu University of Science and TechnologyZhenjiang 212100China Department of Mechanical and Structural Engineering and Materials Science University of StavangerStavanger 4036Norway Faculty of Maritime and Transportation Ningbo UniversityNingbo 315211China State Key Laboratory of Ocean Engineering Shanghai Jiao Tong UniversityShanghai 200240China SJTU Yazhou Bay Institute of Deepsea Science and Technology Sanya 572024China

Offshore wind power is a kind of important clean renewable energy and has attracted increasing attention due to the rapid consumption of non-renewable *** reduce the high cost of energy,a possible try is to utilize the combination of wind and wave energy considering their natural correlation.A combined concept consisting of a semi-submersible wind turbine and four torus-shaped wave energy converters was proposed and numerically studied under normal operating ***,the dynamic behavior of the integrated system under extreme sea conditions has not been studied *** the present work,extreme responses of the integrated system under two different survival modes are *** coupled time-domain simulations with consideration of interactions between the semi-submersible wind turbine and the torus-shaped wave energy converters are performed to investigate dynamic responses of the integrated system,including mooring tensions,tower bending moments,end stop forces,and contact forces at the Column-Torus *** is found that the addition of four tori will reduce the mean motions of the yaw,pitch and *** the tori are locked at the still water line,the whole integrated system is more suitable for the survival modes.

关键词： combined wind and wave energy concept wave energy converter survival mode extreme response

AtomSets as a hierarchical transfer learning framework for small and large materials datasets

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npj Computational Materials 2021年第1期7卷 1575-1583页

作者： Chi chen Shyue Ping ong Department of NanoEngineering University of California San Diego9500 Gilman DrMail Code 0448La JollaCA 92093-0448USA

Predicting properties from a material’s composition or structure is of great interest for materials *** learning has recently garnered considerable interest in materials predictive tasks with low model errors when dealing with large materials ***,deep learning models suffer in the small data regime that is common in materials *** we develop the AtomSets framework,which utilizes universal compositional and structural descriptors extracted from pre-trained graph network deep learning models with standard multi-layer perceptrons to achieve consistently high model accuracy for both small compositional data(130,000).The AtomSets models show lower errors than the graph network models at small data limits and other non-deep-learning models at large data *** also transfer better in a simulated materials discovery process where the targeted materials have property values out of the training data *** models require minimal domain knowledge inputs and are free from feature *** presented AtomSets model framework can potentially accelerate machine learning-assisted materials design and discovery with less data restriction.

关键词： Sets framework hierarchical

Mental stress, atheroma, myocardial ischaemia and injury: the link is inflammation

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General Psychiatry 2023年第6期36卷 454-462页

作者： Hean Teik ong Jinghong chen Cardiology HT Ong Heart Clinic GeorgetownPenangMalaysia Editorial Office of General Psychiatry Shanghai Mental Health CenterShanghai Jiao Tong University School of MedicineShanghaiChina Shanghai Key Laboratory of Psychotic Disorders Shanghai Jiao Tong University School of MedicineShanghaiChina

Increasing observational and experimental trial data have shownthat mental stress can lead toan increase in adverse clinical cardiovascular *** stress affects the heart by inducing ischaemia and precipitating myocardial infarction(MI)or direct myocardial *** stress leads to systemic *** is known to cause rapid atheromatous plaque progression,instability and thrombosis—the classic type 1 *** can also lead to type 2 MI or myocarditis and *** published data linking systemic inflammation,mental stress and cardiovascular disease will be reviewed to establish the linkage between mind and heart,thereby highlighting the importance of holistically managing the patient,not only addressing separate organ ***,recent trial evidence showing the value of anti-inflammatory drugs in cardiovascular and mental conditions will be briefly considered.

关键词： inflammation drugs stress

Insights into electrochemical nitrogen reduction reaction mechanisms:Combined effect of single transition-metal and boron atom

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Journal of Energy Chemistry 2021年第7期30卷 577-585页

作者： Xingzhu chen Wee-Jun ong Xiujian Zhao Peng Zhang Neng Li State Key Laboratory of Silicate Materials for Architectures Wuhan University of TechnologyWuhan 430070HubeiChina School of Energy and Chemical Engineering Xiamen University MalaysiaSelangor Darul Ehsan 43900Malaysia College of Chemistry and Chemical Engineering Xiamen UniversityXiamen 361005FujianChina State Center for International Cooperation on Designer Low-Carbon&Environmental Materials(CDLCEM) School of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001HenanChina Shenzhen Research Institute of Wuhan University of Technology Shenzhen 518000GuangdongChina

Developing single-atom catalysts(SACs) for electrochemical devices is a frontier in energy *** comparison of stability,activity and selectivity between various single atoms is one of the main research focuses in ***,the in-depth understanding of the role that the coordination atoms of single atom play in the catalytic process is ***,we proposed a graphene-like boroncarbon-nitride(BCN) monolayer as the support of single metal *** electrocatalytic nitrogen reduction reaction(eNRR) performances of 3 d,4 d transition metal(TM) atoms embedded in defective BCN were systematically investigated by means of density functional theory(DFT) *** study shows that the TM-to-N and B-to-N π-back bonding can contribute to the activation of N_(2).Importantly,a combined effect is revealed between single TM atom and boron atom on eNRR:TM atom enhances the nitrogen reduction process especially in facilitating the N_(2) adsorption and the NH3 desorption,while boron atom modulates the bonding strength of key intermediates by balancing the charged ***,Nb@BN3 possesses the highest electrocata lytic activity with limiting potential of-0.49 V,and exhibits a high selectivity for nitrogen reduction reaction(NRR) to ammonia compared with hydrogen evolution reaction(HER).As such,this work can stimulate a research doorway for designing multi-active sites of the anchored single atoms and the innate atoms of substrate based on the mechanistic insights to guide future eNRR research.

关键词： Boron-carbon–nitrogen(BCN) Single-atom catalysts Electrocatalytic nitrogen reduction reaction Density functional theory Combined effect

An electrostatic spectral neighbor analysis potential for lithium nitride

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npj Computational Materials 2019年第1期5卷 508-515页

作者： Zhi Deng Chi chen Xiang-Guo Li Shyue Ping ong Department of NanoEngineering University of California San Diego9500 Gilman DrMail Code 0448La JollaCA 92093-0448USA

Machine-learned interatomic potentials based on local environment descriptors represent a transformative leap over traditional potentials based on rigid functional forms in terms of prediction ***,a challenge in their application to ionic systems is the treatment of long-ranged ***,we present a highly accurate electrostatic Spectral Neighbor Analysis Potential(eSNAP)for ionicα-Li3N,a prototypical lithium superionic conductor of interest as a solid electrolyte or coating for rechargeable lithium-ion *** show that the optimized eSNAP model substantially outperforms traditional Coulomb–Buckingham potential in the prediction of energies and forces,as well as various properties,such as lattice constants,elastic constants,and phonon dispersion *** also demonstrate the application of eSNAP in long-time,large-scale Li diffusion studies in Li3N,providing atomistic insights into measures of concerted ionic motion(e.g.,the Haven ratio)and grain boundary *** work aims at providing an approach to developing quantum-accurate force fields for multi-component ionic systems under the SNAP formalism,enabling large-scale atomistic simulations for such systems.

关键词： electrostatic lithium ionic

超前钻孔直径对高应力巷道卸压及掏槽爆破效果影响研究

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华北理工大学学报（自然科学版） 2025年第1期47卷 53-61页

作者：黄斌胡学龙安徽理工大学安徽省煤矿安全采掘装备制造业创新中心安徽淮南232001 中国矿业大学煤炭精细勘探与智能开发全国重点实验室江苏徐州221116 安徽理工大学矿业工程学院安徽淮南232001

随着煤炭开采逐步向深部推进,巷道开挖过程中应力集中问题日益突显,亟需有效解决。本文采用Ansys/Ls-Dyna数值模拟软件,针对高应力环境下不同超前钻孔直径对巷道卸压效果及掏槽爆破效果的影响进行了系统研究。利用ImageJ图像处理软件对... 详细信息

随着煤炭开采逐步向深部推进,巷道开挖过程中应力集中问题日益突显,亟需有效解决。本文采用Ansys/Ls-Dyna数值模拟软件,针对高应力环境下不同超前钻孔直径对巷道卸压效果及掏槽爆破效果的影响进行了系统研究。利用ImageJ图像处理软件对巷道掏槽爆破损伤云图进行了详细分析。结果表明,随着超前钻孔直径的增加,钻孔孔底至岩石内部区域的有效应力逐渐降低,有效实现了卸压作用;随着超前钻孔直径的增大,掏槽爆破岩石块度逐渐减少,小块度占比显著增加,且在大直径钻孔爆破中岩石块度的分布更为均匀。研究成果对提升高应力巷道掏槽爆破效果具有重要指导意义。

关键词：高应力超前钻孔掏槽爆破数值模拟

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Complex strengthening mechanisms in the NbMoTaW multiprincipal element alloy

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npj Computational Materials 2020年第1期6卷 1074-1083页

作者： Xiang-Guo Li Chi chen Hui Zheng Yunxing Zuo Shyue Ping ong Department of NanoEngineering University of California San Diego9500 Gilman DriveMail Code 0448La JollaCA 92093-0448USA

Refractory multi-principal element alloys(MPEAs)have exceptional mechanical properties,including high strength-to-weight ratio and fracture toughness,at high *** we elucidate the complex interplay between segregation,short-range order,and strengthening in the NbMoTaW MPEA through atomistic simulations with a highly accurate machine learning interatomic *** the single crystal MPEA,we find greatly reduced anisotropy in the critically resolved shear stress between screw and edge dislocations compared to the elemental *** the polycrystalline MPEA,we demonstrate that thermodynamically driven Nb segregation to the grain boundaries(GBs)and W enrichment within the grains intensifies the observed short-range order(SRO).The increased GB stability due to Nb enrichment reduces the von Mises strain,resulting in higher strength than a random solid solution *** results highlight the need to simultaneously tune GB composition and bulk SRO to tailor the mechanical properties of MPEAs.

关键词： strengthening alloy toughness