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Multi-Objective Optimization of EV Charging and Discharging for Different Stakeholders

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CSEE Journal of Power and Energy Systems 2023年第6期9卷 2301-2308页

作者： Shaofeng Lu Bing Han fei xue Lin Jiang Kejun Qian the Shien-Ming Wu School of Intelligent Engineering South China University of TechnologyGuangzhou 511442China the Department of Electrical and Electronic Engineering School of Advanced TechnologyXi'an Jiaotong-Liverpool UniversitySuzhou 215123China the Department of Electrical Engineering and Electronics University of LiverpoolLiverpoolUK Suzhou Power Supply Company State Grid Corporation of ChinaSuzhou 215000China

As a dynamic energy storage system,electric vehicles(EV)play important roles in future power *** this paper,a model for EV aggregator participation in the electricity market has been built with a focus on the feasibility issue of the model arising from economic interest inconsistencies between different stakeholders:EV owners and *** the model,the EV aggregator attends day-ahead energy and reserve markets for profit maximization by scheduling charging and discharging behaviors of *** issue exists since different stakeholders have different interests which are not necessarily consistent,*** maximization leads to increasing EV owners'charging *** investigate the economic relationship between the two stakeholders,two multi-objective optimization methods(weighted sum and$\varepsilon$-constraint methods)are proposed to take the aggregator profit and EV owners'charging fee into account in the model.A sensitivity analysis is applied to examine the aggregator profit under different price scenarios,which reveals the internal relationship between EV owners'charging fees and aggregator *** proposed EV charging and discharging strategy in this paper could be used to determine the settlement price between the aggregator and owners to ensure the feasibility of participation from both EV owners and stakeholders in electricity markets.

关键词： Aggregator economic inconsistency issue electricity market EV owners EV multi-objective optimization

喀斯特森林木本植物叶片功能性状对土壤特性的响应

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热带亚热带植物学报 2024年第3期32卷 310-318页

作者：熊玲龙翠玲梁盛吴陶红刘奇廖全兰薛飞贵州师范大学地理与环境科学学院贵阳550025 贵州习水国家级自然保护区管理局贵州习水564600

为明确喀斯特森林植物叶片功能性状对土壤特性的响应,采用样地与样线相结合的方法调查茂兰喀斯特森林的木本植物群落,计算不同地形木本植物叶片加权平均性状值,运用单因素方差分析和冗余分析不同地形植物叶片功能性状的差异及其与土壤... 详细信息

为明确喀斯特森林植物叶片功能性状对土壤特性的响应,采用样地与样线相结合的方法调查茂兰喀斯特森林的木本植物群落,计算不同地形木本植物叶片加权平均性状值,运用单因素方差分析和冗余分析不同地形植物叶片功能性状的差异及其与土壤特性的关系。结果表明,在生长型(常绿、落叶)和群落水平上,植物叶片功能性状在不同地形间存在显著差异(P0.05)。不同地形间土壤特性差异显著(P<0.05),漏斗地形土壤的田间持水量、毛管孔隙度、全氮含量、全磷含量及有机质含量较高,土壤肥力最佳,槽谷和阴坡次之,而阳坡地段土壤相对贫瘠。不同地形植物叶片功能性状与土壤特性间具有相关性,但不同地形土壤特性对叶片功能性状变异的解释率不同,影响植物叶片功能性状的主要土壤特性为有机质含量、全氮含量、全磷含量、田间持水量和土壤容重。茂兰喀斯特森林不同地形植物叶片功能性状和土壤特性的差异较大,随着土壤特性的改变,叶片功能性状的响应特征不同,这有利于林区物种共存及生物多样性维持。

关键词：喀斯特森林地形土壤特性叶片功能性状冗余分析

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基于无人机定位的智能电动升降座椅控制系统优化研究

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自动化技术与应用 2024年第2期43卷 160-164页

作者：王立生孙伟薛飞国网冀北电力有限公司张家口供电公司河北张家口075000

由于传统方法受实际座椅工作环境影响,导致升降位置不精准的问题。研究基于无人机定位的智能电动升降座椅控制系统优化方法。在硬件上,采用PLC作为系统运动控制器,通过倾角调平控制单元,实时调整升降机构执行的动作。利用伺服驱动装置,... 详细信息

由于传统方法受实际座椅工作环境影响,导致升降位置不精准的问题。研究基于无人机定位的智能电动升降座椅控制系统优化方法。在硬件上,采用PLC作为系统运动控制器,通过倾角调平控制单元,实时调整升降机构执行的动作。利用伺服驱动装置,为座椅提供动力。在软件上,构建座椅运动数学模型,利用双阵元干涉仪获取相位差,利用无人机定位算法获得目标位置。通过升降、调平、复位步骤,实现智能电动升降座椅优化控制。实验结果表明,该优化方法位移/时间曲线初始位置和结束位置数据均与目标位置数据一致,具有理想控制效果。

关键词：无人机定位智能电动升降座椅控制电动缸双阵元干涉仪

SYNTHESIS AND CHARACTERIZATION OF FUNCTIONALIZED CARBON BLACK/POLY(VINYL ALCOHOL) HIGH REFRACTIVE INDEX NANOCOMPOSITES

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Chinese Journal of Polymer Science 2012年第5期30卷 652-663页

作者： Peng-fei xue Ji-bin Wang Yu-bin Bao 李秋影 Chi-fei Wu Polymer Alloy Laboratory and Key Laboratory of Ultrafine Materials of Ministry of Education East China University of Science and TechnologyShanghai200237China Shanghai Key Laboratory Polymeric Materials East China University of Science and TechnologyShanghai200237China

Carbon black （CB）/polymer composites with high refractive index （RI） were fabricated from poly（vinyl alcohol）（PVA） and covalently functionalized nano-CB （PVA-es-CB） by simple esterification reaction. Transmission electron microscopy showed that tmifonn aggregates of PVA-es-CB nanoparticles with a size smaller than I00 nm formed in the nanocomposite films. Ellipsometric measurements indicated that the PVA-es-CB/PVA composite films had a RI in the range 1.520-1.598 linearly increased with the PVA-es-CB volume content. Theoretical equation based on Lorentz-Lorenz theory provided reasonably close estimation of the refractive indices to the experimentally observed values. The hybrid films also revealed relatively good surface planarity, thermal stability and optical transparency.

关键词： High refractive index Carbon black Poly(vinyl alcohol) Nanocomposite.

Phase-field framework with constraints and its applications to ductile fracture in polycrystals and fatigue

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npj Computational Materials 2022年第1期8卷 149-163页

作者： fei xue Tian-Le Cheng Yinkai Lei You-Hai Wen U.S.DOE National Energy Technology Laboratory AlbanyOR 97321USA Leidos Research Support Team AlbanyOR 97321USA

Modeling of ductile fracture in polycrystalline structures is challenging,since it requires integrated modeling of cracks,crystal plasticity,and *** we extend the typical phase-field framework to the situations with constraints on the order parameters,and formulate two types of phase-field models on ductile *** Type-Ⅰ model incorporates three sets of order parameters,which describe the distributions of cracks,plastic strain,and grains,*** plasticity is employed within grain interiors accommodated by J_(2)plasticity at grain *** applications of the Type-Ⅰ model to single crystals and bicrystals demonstrate the influences of grain orientations and grain boundaries on crack *** the Type-Ⅱ model,J_(2)plasticity is assumed for the whole system and grain structures are *** advantage of the efficiency of the fast Fourier transform,our Type-Ⅱ model is employed to study low cycle *** closure and striation-like patterning of plastic strain are observed in the *** growth rate is analyzed as a function of the J-integral,and the simulated fatigue life as a function of plastic strain agrees with the Coffin–Manson relation without a priori assumption.

关键词： ductile fatigue grain

Overview of magnetoelastic coupling in (Mn, Fe)2(P, Si)-type magnetocaloric materials

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Rare Metals 2018年第9期37卷 723-733页

作者： xue-fei Miao Shu-Yuan Hu Feng Xu Ekkes Bruck MIIT Key Laboratory of Advanced Metallic and Intermetallic Materials Technology School of Materials Science and Engineering Nanjing University of Science and Technology Nanjing 210094 China Fundamental Aspects of Materials and Energy Department of Radiation Science and Technology Delft University of Technology Mekelweg 15 2629 JB Delft The Netherlands

（MnFe）2（P, Si）-type compounds are, to date, one of the best candidates for magnetic refrigeration and energy conversion applications due to the combination of giant magnetocaloric effect （MCE）, tunable working temperature range and low material cost. The giant MCE in the （Mn, Fe）2（P, Si）-type compounds originates from strong mag- netoelastic coupling, where the lattice degrees of freedom and spin degrees of freedom are efficiently coupled. The tunability of the phase transition, in terms of the critical temperature and the character of the phase transition, is essentially attributed to the changes in the magnetoelastic coupling in the （Mn, Fe）2（P, Si）-type compounds. In this review, not only the fundamentals of the magnetoelastic coupling but also the related practical aspects such as magnetocaloric performance, hysteresis issue and mechanical stability are discussed for the （Mn, Fe）2（P, Si）- type compounds. Additionally, some future fundamental studies on the MCE as well as possible ways of solving the hysteresis and fracture issues are proposed.

关键词： (Mn, Fe)2(P, Si) Magnetocaloric effect Magnetoelastic coupling Hysteresis Mechanical stability

Multi-scale nature of non-blade-order propagating flow disturbances in axial compressors

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Chinese Journal of Aeronautics 2022年第9期35卷 129-142页

作者： Hao WANG Yan’gang WANG Hanru LIU fei xue Zhongnan WANG School of Power and Energy Northwestern Polytechnical UniversityXi'an 710072China College of Engineering and Physical Sciences University of BirminghamBirmingham B152TTUnited Kingdom

Non-blade-order flow disturbances, also referred to as pre-stall disturbances or tip flow unsteadiness, are closely related with compressor instabilities. The present work provides a comprehensive investigation on multi-scale nature of non-blade-order disturbances and the underlying flow physics in axial compressors. By applying full-annulus Unsteady Reynolds-Averaged Navier-Stokes(URANS) simulations, along with space–time correlation and spatial Fourier decomposition, to the disturbed pressure, the propagating feature of the non-blade-order disturbances is obtained. Further, a bridge between non-blade-order disturbances and the evolution of unsteady vortex has been set up. The results show that non-blade-order disturbances, featured as short-length-scale(35 modes across annulus), first appear as the occurrence of tip leakage vortex fluctuation, while the compressor still operates far from stall. Leading-edge radial vortex appears at near stall condition, and its movement induces a circumferential propagating disturbance overlaying on the one induced by oscillating tip leakage vortex. The interaction of the short-scale disturbances with a lowamplitude long-scale(of circumference) disturbance is observed, which results in disturbances with multiple scales of consecutive spatial modes, along with multiple frequency peaks in spectra. The compressor falls into stall as the circumferential nonuniform scattering of the leading-edge vortexes occurs. The densely-and sparsely-scattered leading-edge radial vortexes induce a high-amplitude long-scale(of circumference) disturbance , i.e. stall disturbance.

关键词： Axial compressors Flow instabilities Multi-scale disturbances Stall Unsteady flow

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浇注工艺对双金属行星轮轴承复合质量的影响

热加工工艺 2024年第12期53卷 62-66,72页

作者：张伟匡锐魏昂周林薛飞张慧虹盖泽海军装备部陕西西安710000 中国船舶集团有限公司第十二研究所陕西兴平713102 上海船舶设备研究所上海200031

采用不同铸造工艺参数对某行星轮轴承表面进行ZSnSb11Cu6锡基合金的复合浇注,通过磁粉探伤、超声波探伤及结合强度检测,研究了不同浇注模具、不同合金浇注温度对双金属行星轮轴承复合质量的影响。结果表明:采用金属型模具、合金浇注温度... 详细信息

采用不同铸造工艺参数对某行星轮轴承表面进行ZSnSb11Cu6锡基合金的复合浇注,通过磁粉探伤、超声波探伤及结合强度检测,研究了不同浇注模具、不同合金浇注温度对双金属行星轮轴承复合质量的影响。结果表明:采用金属型模具、合金浇注温度为430℃时可获得比砂型模具、420℃及450℃浇注时更好的合金表面质量和结合强度。经后续工艺验证及小批量生产试制,证实了工艺的稳定性。

关键词：轴承锡基合金浇注工艺复合

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可靠性的科学探索:从经典到量子

物理 2024年第3期53卷 147-156页

作者：杜亦牧崔廉相关雪飞孙昌璞中国工程物理研究院研究生院北京100193 北京计算科学研究中心北京100193 北京大学物理学院北京100871

作为设备稳定服役能力的一种衡量,可靠性对工程技术发展和创新十分重要。基于物理、信息论和统计方法的耦合,可靠性研究正逐步发展并有望成为一门新的科学。同时随着量子技术的发展,量子相干器件及设备将会被大量地植入到传统装备系统... 详细信息

作为设备稳定服役能力的一种衡量,可靠性对工程技术发展和创新十分重要。基于物理、信息论和统计方法的耦合,可靠性研究正逐步发展并有望成为一门新的科学。同时随着量子技术的发展,量子相干器件及设备将会被大量地植入到传统装备系统中。这不仅给可靠性自身的研究带来新的机遇和挑战,也会使量子物理和可靠性研究交叉起来,导致交叉领域思想上的原始创新。文章首先介绍可靠性研究从工程向科学迈进的历程,然后从可靠性工程需求的视角介绍量子可靠性的基本概念和逻辑,强调量子自洽历史对寿命统计的内在描述,最后结合目前量子技术所面临的退相干挑战,展望可靠性工程对量子技术的潜在应用。

关键词：可靠性理论浴盆曲线最大熵原理退相干历史量子可靠性