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Theoretical Analysis and Experimental Research of Surface Texture Hydrodynamic Lubrication

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Chinese Journal of Mechanical Engineering 2022年第2期35卷 174-188页

作者： Dan Li Xuefeng Yang Yuanbo Wu Jian Cheng Shouren wang zhuang wan Wenbo Liu Guofeng Xia College of Mechanical Engineering University of JinanJinan 250022China College of Mechanical Engineering Hubei University of TechnologyHubei 430068China University of Science and Technology of China HefeiChina

The research on surface texture is developing from single macro-texture to composite micro-nano *** current research on the anti-friction mechanism and theoretical models of textures is relatively *** the characteristics of different types of surface textures and determining the applicable working conditions of each texture is the focus of current *** this paper,a mathematical model of hydrodynamic lubrication is established based on Navier-Stokes *** FLUENT software is used to simulate and analyze the four texture models,explore the dynamic pressure lubrication characteristics of different texture types,and provide data support for texture *** key variable values required by the mathematical model are obtained through the simulation *** friction coefficient of the texture under different working conditions was measured through friction and wear experiments,and the mathematical model was verified by the experimental *** research results show that circular texture is suitable for low to medium speed and high load conditions,chevron texture is suitable for medium to high speed and medium to high load conditions,groove texture is suitable for high speed and low load conditions,and composite texture is suitable for high speed and medium to high load *** the experimental results with the results obtained by the mathematical model,it is found that the two are basically the same in the ranking of the anti-friction performance of different textures,and there is an error of 10%−40%in the friction coefficient *** this study,a mathematical model of hydrodynamic lubrication was proposed,and the solution method of the optimal surface texture model was determined.

关键词： Hydrodynamic lubrication Tribological characteristics Surface texture

Multi-Time-Scale Resource Allocation Based on Long-Term Contracts and Real-Time Rental Business Models for Shared Energy Storage Systems

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Journal of Modern Power Systems and Clean Energy 2024年第2期12卷 454-465页

作者： Yuxuan zhuang Zhiyi Li Qipeng Tan Yongqi Li Minhui wan College of Electrical Engineering Zhejiang UniversityHangzhouChina China Southern Power Grid Power Generation Company Energy Storage Research Institute GuangzhouChina IEEE

The push for renewable energy emphasizes the need for energy storage systems(ESSs)to mitigate the unpre-dictability and variability of these sources,yet challenges such as high investment costs,sporadic utilization,and demand mismatch hinder their broader *** response,shared energy storage systems(SESSs)offer a more cohesive and efficient use of ESS,providing more accessible and cost-effective energy storage solutions to overcome these *** enhance the profitability of SESSs,this paper designs a multi-time-scale resource allocation strategy based on long-term contracts and real-time rental business *** initially construct a life cycle cost model for SESS and introduce a method to estimate the degradation costs of multiple battery groups by cycling numbers and depth of discharge within the ***,we design various long-term contracts from both capacity and energy perspectives,establishing associated models and real-time rental ***,multi-time-scale resource allocation based on the decomposition of user demand is *** analysis validates that the business model based on long-term contracts excels over models operating solely in the real-time market in economic viability and user satisfaction,effectively reducing battery degradation,and leveraging the aggregation effect for SESS can generate an additional increase of 10.7%in net revenue.

关键词： Capacity allocation long-term contracts shared energy storage system stochastic programming

Numerical analysis of the correlation between fluid dynamic modes and hydrodynamic noise in flows around a three-dimensional circular cylinder

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Journal of Hydrodynamics 2024年第1期36卷 119-129页

作者： Jia-jia Qin Ming-xin Zou Yuan zhuang De-cheng wan Computational Marine Hydrodynamics Lab(CMHL) School of Naval ArchitectureOcean and Civil EngineeringShanghai Jiao Tong UniversityShanghai200240China Wuhan Second Ship Design and Research Institute Wuhan430205China

The flow around a circular cylinder for Re=1000 is characterized by flow separation and Karman vortex *** typical flow features can be captured to study the correlation between fluid fields and sound *** this paper,the three-dimensional circular cylinder is taken as the research object,and the probes of surface fluctuating pressure and far field sound pressure are arranged every 10°.The directional diagram and the coherence of fluctuating pressure and sound pressure are *** relationship between the flow mode and hydrodynamic noise is studied by using dynamic mode decomposition(DMD).The characteristics of the dipole and quadrupole sound source term of a long span cylinder are *** results show that at the angles between 30°–120°and 190°–350°,the fluctuating pressure contributes more to the generation of dipole *** quadrupole sound source shows three-dimensional effects,which is more obvious in a cylinder with large spanwise length.

关键词： Pressure coherence dynamic mode decomposition flow-sound correlation circular cylinder

纳米氧化石墨烯作为临床药物载体在肿瘤治疗中的研究

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中国药理学通报 2024年第8期40卷 1413-1418页

作者：钟春莲方昌建周桂羽朱慧玲郑镗庄婉晶刘剑卢余盛闽江学院材料与化学工程学院福建省智能药物闽台港澳科技合作基地闽江学院福州海洋研究院海洋药物研发中心福建福州350108 厦门大学生命科学学院分子病毒学与分子诊断学国家重点实验室国家传染病诊断试剂与疫苗工程技术研究中心福建厦门361102 福建中医药大学药学院结构药理学与中药化学生物学研究所福建福州350122

免疫治疗的出现开创了癌症治疗的新时代,但其临床疗效有限,其中一个主要原因是肿瘤局部药物浓度过低,不能有效激活机体的免疫反应。纳米材料因其独特的载药优势,逐渐应用于临床肿瘤治疗。纳米氧化石墨烯(nanographene oxide,NGO)是一种... 详细信息

免疫治疗的出现开创了癌症治疗的新时代,但其临床疗效有限,其中一个主要原因是肿瘤局部药物浓度过低,不能有效激活机体的免疫反应。纳米材料因其独特的载药优势,逐渐应用于临床肿瘤治疗。纳米氧化石墨烯(nanographene oxide,NGO)是一种新型二维纳米材料,具有巨大的载药界面,化学稳定性、生物相容性及高效的光热转换效率等。此外,功能化修饰可实现药物的靶向输送,减少药物的毒副作用,提高药物在肿瘤部位的富集浓度。该文概述了NGO在肿瘤药物装载、靶向输送及肿瘤光热治疗等方面的应用与挑战,有望为今后纳米氧化石墨烯应用于临床肿瘤治疗提供理论基础。

关键词：癌症治疗纳米氧化石墨烯药物装载靶向输送光热治疗联合治疗

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PBVP of Integrodifferential Equations with Carathéodory Functions

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Acta Mathematica Sinica,English Series 1998年第4期14卷 463-472页

作者： zhuang wan Chen Yubo, Department of Mathematics, Shandong Normal University, Jinan 250014, China 山东师范大学数学系山东济南

We study the periodic boundary value problems for nonlinear integro-differential equa- tions of Volterra type with Carathéodory functions. For two situations relative to lower and upper solutions α and β:αβ or β α, the existence of solutions and the monotone iterative method for establishing extreme solutions are considered.

关键词： Integrodifferential equations Periodic boundary value problems Carathéodory conditions Lower and upper solutions Sobolev spaces Topological degree

MONOTONE ITERATIVE TECHNIQUE FOR NONLINEAR NEUTRAL DELAY DIFFERENTIAL EQUATIONS

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Acta Mathematica Scientia 1998年第3期18卷 285-292页

作者：姜子文庄万 Department of Mathematics Shandong Normal University Jinan 250014 China

The objective of this paper is to develop monotone techniques for obtaining extremal solutions of initial value problem for nonlinear neutral delay differential equations.

关键词： monotone iterative technique neutral delay differential equation initial value problem extremal solutions

THE　GENERALIZED　SOLUTIONS　OF　PBVP　FOR　INTEGRO-DIFFERENTIAL　EQUATIONS

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Systems Science and Mathematical Sciences 1996年第2期9卷 145-150页

作者： zhuang wan CHEN Yubo(Department of Mathematics, Shandong Normal University, Jinan 250014, China) 山东师范大学数学系山东济南

ＴＨＥＧＥＮＥＲＡＬＩＺＥＤＳＯＬＵＴＩＯＮＳＯＦＰＢＶＰＦＯＲＩＮＴＥＧＲＯ－ＤＩＦＦＥＲＥＮＴＩＡＬＥＱＵＡＴＩＯＮＳＺＨＵＡＮＧＷａｎ；ＣＨＥＮＹｕｂｏ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｈｅｍａｔｉｃｓ，Ｓｈａｎ... 详细信息

ＴＨＥＧＥＮＥＲＡＬＩＺＥＤＳＯＬＵＴＩＯＮＳＯＦＰＢＶＰＦＯＲＩＮＴＥＧＲＯ－ＤＩＦＦＥＲＥＮＴＩＡＬＥＱＵＡＴＩＯＮＳＺＨＵＡＮＧＷａｎ；ＣＨＥＮＹｕｂｏ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｈｅｍａｔｉｃｓ，ＳｈａｎｄｏｎｇＮｏｒｍａｌＵｎｉｖｅｒｓ...

关键词： Integro-differential equations periodic boundary value problems generalizedsolutions, monotone iteration imbedded theorem topological degree.

光和微生物降解对芦苇落叶溶解有机物与铅相互作用的影响

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环境科学学报 2022年第9期42卷 113-122页

作者：刘芳陈琳崴庄婉娥杨丽阳福州大学环境与安全工程学院福州350116 福建农林大学生命科学学院福州350002

溶解有机物(DOM)是决定水环境中铅(Pb)的形态、环境行为和生态风险的重要因子.然而,落叶DOM与Pb(Ⅱ)络合作用的调控机制尚不清楚.光和微生物降解是调控DOM含量、组成与活性的两个关键过程.本研究运用降解培养实验、光谱学表征和荧光猝... 详细信息

溶解有机物(DOM)是决定水环境中铅(Pb)的形态、环境行为和生态风险的重要因子.然而,落叶DOM与Pb(Ⅱ)络合作用的调控机制尚不清楚.光和微生物降解是调控DOM含量、组成与活性的两个关键过程.本研究运用降解培养实验、光谱学表征和荧光猝灭滴定,考察光和微生物降解单独作用和共同作用对芦苇落叶DOM的改造及其对DOM与Pb(Ⅱ)相互作用的影响.激发-发射三维荧光光谱-平行因子分析共识别出4个类腐殖质组分(C1~C4)和1个类蛋白质组分(C5).类腐殖质组分更容易被光降解,类蛋白质组分则被微生物优先利用,光降解在短期的光-微生物降解过程中起主导作用.对于原始落叶DOM,Pb(Ⅱ)主要与类腐殖质组分C1、C2和C4络合,C3组分只在光-微生物降解后的样品呈现显著荧光猝灭,类蛋白质组分C5在光和光-微生物降解后开始参与络合.类腐殖质C1与Pb(Ⅱ)络合的条件稳定常数logK_(M)在光降解后升高而在光-微生物降解后下降,C2和C4的logK_(M)值经过各降解过程后均升高.降解后这3个组分参与络合的比例f和络合容量F_(max)·f均显著降低,且光降解的影响显著高于微生物降解.这些结果表明,光降解和微生物降解对DOM丰度、组成和结构的改造将显著影响其与金属离子的络合稳定性和络合容量.

关键词：溶解有机物落叶光降解微生物降解铅

THE EXISTENCE OF EXTREMAL SOLUTIONS FOR PBVP OF NONLINEAR INTEGRODIFFERENTIAL SYSTEMS

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滨州学院学报 1991年第4期12卷 10-12页

作者： zhuang wan Chen Yubo (Shandong Normal University)

1 Introduction Consider the following periodic bounded value problem(PBVP for short)of nonlinear integrodifferential system of the form u’=H(t,u,Ku) u(0)=u(2π) (1.1) where H∈C∈[I×R^n×R^n,R^n)。

关键词： monotone maximal iterative uniformly Shandong 北一 zhuang 镇石