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Mapping Network-Coordinated Stacked Gated Recurrent Units for Turbulence Prediction

IEEE/CAA Journal of Automatica Sinica 2024年第6期11卷 1331-1341页

作者： Zhiming Zhang Shangce Gao MengChu Zhou Mengtao Yan shuyang cao Faculty of Engineering University of ToyamaToyama 930-8555Japan Helen and John C.Hartmann Department of Electrical and Computer Engineering New Jersey Institute of TechnologyNewark NJ 07102 USA Gaoling School of Artificial Intelligence Renmin University of ChinaBeijing 100872China College of Civil Engineering Tongji UniversityShanghai 200092China IEEE

Accurately predicting fluid forces acting on the sur-face of a structure is crucial in engineering design.However,this task becomes particularly challenging in turbulent flow,due to the complex and irregular changes in the flow field.In this study,we propose a novel deep learning method,named mapping net-work-coordinated stacked gated recurrent units(MSU),for pre-dicting pressure on a circular cylinder from velocity data.Specifi-cally,our coordinated learning strategy is designed to extract the most critical velocity point for prediction,a process that has not been explored before.In our experiments,MSU extracts one point from a velocity field containing 121 points and utilizes this point to accurately predict 100 pressure points on the cylinder.This method significantly reduces the workload of data measure-ment in practical engineering applications.Our experimental results demonstrate that MSU predictions are highly similar to the real turbulent data in both spatio-temporal and individual aspects.Furthermore,the comparison results show that MSU predicts more precise results,even outperforming models that use all velocity field points.Compared with state-of-the-art methods,MSU has an average improvement of more than 45%in various indicators such as root mean square error(RMSE).Through comprehensive and authoritative physical verification,we estab-lished that MSU’s prediction results closely align with pressure field data obtained in real turbulence fields.This confirmation underscores the considerable potential of MSU for practical applications in real engineering scenarios.The code is available at https://***/zhangzm0128/MSU.

关键词： Convolutional neural network deep learning recurrent neural network turbulence prediction wind load predic-tion.

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Comparison and harmonization of building wind loading codes among the Asia-Pacific Economies

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Frontiers of Structural and Civil Engineering 2013年第4期7卷 402-410页

作者： Yaojun GE shuyang cao Xinyang JIN State Key Laboratory for Disaster Reduction in Civil Engineering Tongji UniversityShanghai 200092China China Academy of Building Research Beijing 100013China

This paper reviews wind loading codes and standards in the Asia-Pacific Region,in particular in the 15 countries and areas.A general description of wind loading model is given as a famous wind loading chain described by four variables including velocity pressure,exposure factor,pressure coefficient,and gust response factor.Through the APEC-WW Workshops and the extensive calculations for three examples of low,medium and high rise buildings,these four important variables of wind loads are evaluated and compared with statistical parameters,mean values and coefficients of variation.The main results of the comparison show some differences among the 15 economies,and the reasons and further incorporation are discussed and suggested.

关键词： wind loading codification velocity pressure exposure factor pressure coefficient gust response factor

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上游山脉对风力机尾流和功率影响的模拟研究

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空气动力学学报 2024年第5期42卷 97-109页

作者：张子瑜黄鹏曹曙阳同济大学土木工程防灾减灾全国重点实验室上海200092 西安大略大学土木与环境工程系伦敦N6A 5B9加拿大

更好地了解山地上风力机尾流和功率特性有助于山地风电场的布局设计。本研究采用高精度的大涡模拟(large-eddy simulation, LES)研究了上游山脉对下游山脉顶部风力机的尾流和功率性能的影响。在基于伪谱法的LES框架中,本文分别使用了滤... 详细信息

更好地了解山地上风力机尾流和功率特性有助于山地风电场的布局设计。本研究采用高精度的大涡模拟(large-eddy simulation, LES)研究了上游山脉对下游山脉顶部风力机的尾流和功率性能的影响。在基于伪谱法的LES框架中,本文分别使用了滤波致动盘模型和浸入边界法模拟风力机和山脉对气流的作用。研究表明,LES结果与实验测量的速度和湍动能吻合很好,对湍动能的预测优于雷诺平均Navier-Stokes(Reynolds average Navier-Stokes, RANS)方法。在山脉风力机尾流的模拟中,研究发现风力机尾迹中心轨迹在山顶下风处向下偏转。与孤立山地相比,双峰型山地的尾流恢复速度更快,其恢复速率随着山脉间距的增加先增加后减少。对于有山脉情况,尽管由于气流的加速效应,高斯分布与尾流速度亏损分布在尾流下边缘存在差异,但高斯曲线仍然适用于近似风力机尾流的速度亏损。此外,因为上游山脉尾迹会扩散且到达下游山脉迎风面时会被抬升,所以当山脉间距达到一定距离时,风轮会完全浸没在上游山脉尾迹中,导致风力机功率性能受到上游山脉的不利影响,随着山脉间距的增加先下降后上升。本研究加深了对山地风力机尾流特性和功率性能的认识,对山区风电场的布局设计具有指导意义。

关键词：风能大涡模拟大气边界层山脉风力机尾流功率性能

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穴位埋线联合规范化抗敏治疗慢性荨麻疹的临床研究

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中国当代医药 2024年第11期31卷 29-32页

作者：孙莹曹书洋刘晶马春烨滕秋楠黑龙江省齐齐哈尔市中医医院皮肤性病科黑龙江齐齐哈尔161000

目的探讨穴位埋线联合规范化抗敏治疗慢性荨麻疹的临床效果。方法选取2022年5月至2023年5月齐齐哈尔市中医医院收治的100例慢性荨麻疹患者作为研究对象,采用随机数字表法将其分为对照组和治疗组,每组各50例。对照组患者采用规范化抗敏治... 详细信息

目的探讨穴位埋线联合规范化抗敏治疗慢性荨麻疹的临床效果。方法选取2022年5月至2023年5月齐齐哈尔市中医医院收治的100例慢性荨麻疹患者作为研究对象,采用随机数字表法将其分为对照组和治疗组,每组各50例。对照组患者采用规范化抗敏治疗,治疗组患者采用穴位埋线联合规范化抗敏治疗。比较两组患者的症状体征评分、临床有效率、血清免疫因子指标水平、不良反应总发生率及复发率。结果观察组治疗后的瘙痒程度评分、风团严重评分、白细胞介素-4(IL-4)、免疫球蛋白E(IgE)、不良反应总发生率、疾病复发率均低于对照组,差异有统计学意义(P<0.05);治疗组的总有效率、治疗后γ干扰素(IFN-γ)表达水平均高于对照组,差异有统计学意义(P<0.05)。结论采取穴位埋线联合规范化抗敏治疗慢性荨麻疹,可改善患者临床症状与体征,改善血清免疫因子表达水平,降低疾病复发率、不良反应发生率,临床安全性、有效性较高,值得推荐。

关键词：穴位埋线规范化抗敏治疗慢性荨麻疹临床症状

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Maslinic acid supplementation prevents di(2-ethylhexyl)phthalate-induced apoptosis via PRDX6 in peritubular myoid cells of Chinese forest musk deer

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Journal of Environmental Sciences 2024年第9期143卷 47-59页

作者： Heran cao Zhenpeng Li Tianqi Jin shuyang He Shujuan Liu Long Li Yang Wang Ye Gong Gang Wang Fangxia Yang Wuzi Dong College of Animal Science and Technology Northwest A&F UniversityShaanxi 712100China College of Forestry Northwest A&F UniversityShaanxi 712100China Biology Research Centre of Qin-Mountains Wildlife Northwest A&F UniversityShaanxi 712100China Shaanxi Qiyuan-Times Agri-Tech Development Co.Ltd. Shaanxi 725000China

Chinese forest musk deer(FMD),an endangered species,have exhibited low reproductive rates even in captivity due to stress conditions.Investigation revealed the presence of di(2-ethylhexyl)phthalate(DEHP),an environmental endocrine disruptor,in the serum and skin of captive FMDs.Feeding FMDs with maslinic acid(MA)has been observed to alleviate the stress response and improve reproductive rates,although the precise molecular mechanisms remain unclear.Therefore,this study aims to investigate the molecular mechanisms underlying the alleviation of DEHP-induced oxidative stress and cell apoptosis in primary peritubular myoid cells(PMCs)through MA intake.Primary PMCs were isolated and exposed to DEHP in vitro.The results demonstrated that DEHP significantly suppressed antioxidant levels and promoted cell apoptosis in primary PMCs.Moreover,interfering with the expression of PRDX6 was found to induce excessive reactive oxygen species(ROS)production and cell apoptosis in primary PMCs.Supplementation with MA significantly upregulated the expression of PRDX6,thereby attenuating DEHP-induced oxidative stress and cell apoptosis in primary PMCs.These findings provide a theoretical foundation for mitigating stress levels and enhancing reproductive capacity of in captive FMDs.

关键词： Maslinic acid Forest musk deer Di(2-ethylhexyl)phthalate Peritubular myoid cells PRDX6

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湍流强度对桥梁断面气动力特性的影响

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哈尔滨工业大学学报 2023年第3期55卷 20-28页

作者：王伟拓曹曙阳操金鑫同济大学土木工程学院上海200092 土木工程防灾国家重点实验室(同济大学) 上海200092

桥梁结构处于大气边界层中,由于断面外形复杂、折点较多,其绕流常呈现复杂的流动分离和再附着状态,应评估来流湍流对桥梁断面气动特性的影响。基于节段模型测压风洞试验,获取了均匀流场和3种格栅湍流场下模型表面平均和脉动压力分布,评... 详细信息

桥梁结构处于大气边界层中,由于断面外形复杂、折点较多,其绕流常呈现复杂的流动分离和再附着状态,应评估来流湍流对桥梁断面气动特性的影响。基于节段模型测压风洞试验,获取了均匀流场和3种格栅湍流场下模型表面平均和脉动压力分布,评估了桥梁断面气动力特性的改变,分析了不同风场下断面流动分离再附着的变化。研究发现:湍流显著改变桥梁断面前缘(特别是零度和正攻角时上表面和负攻角时下表面)的分离和再附着特性,进而影响桥梁整体断面的气动力特性;随着湍流强度增加,前缘分离点的平均压力系数的幅值增大,而再附着点向上游移动;湍流强度对分离和再附着的影响程度随着风攻角的增大而变得显著;三分力系数在小风攻角时受湍流强度影响较小,在大风攻角下湍流强度的影响较大,变化的主要原因是断面前缘的压力分布变化。

关键词：湍流桥梁断面气动力攻角流动分离再附着

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自动网格体系在柱体绕流大涡模拟中的适用性评估

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同济大学学报（自然科学版） 2023年第4期51卷 542-550页

作者：张宇鑫曹曙阳操金鑫同济大学土木工程学院上海200092 同济大学土木工程防灾国家重点实验室上海200092

为了评估基于snappyHexMesh方法生成的自动网格体系在二维柱体绕流大涡模拟中的适用性,比较了该自动网格体系与人工网格体系对于Re为3900圆柱绕流和Re为22000方柱绕流的数值模拟结果。通过设置合理的计算域以及数值格式,采用snappyHexM... 详细信息

为了评估基于snappyHexMesh方法生成的自动网格体系在二维柱体绕流大涡模拟中的适用性,比较了该自动网格体系与人工网格体系对于Re为3900圆柱绕流和Re为22000方柱绕流的数值模拟结果。通过设置合理的计算域以及数值格式,采用snappyHexMesh自动网格以及人工网格的算例都表现出良好的数值稳定性。将不同网格体系的数值模拟结果与物理试验结果进行对比,结果表明,采用snappyHexMesh网格可以提高数值求解效率;圆柱绕流对网格体系的变化比较敏感,不同密度的snappyHexMesh网格会显著影响圆柱气动力特征以及尾流区域的流场结果;snappyHexMesh网格体系可以准确预测方柱绕流,在方柱绕流大涡模拟中具有相较于圆柱绕流更好的适用性。

关键词：计算流体力学自动网格体系柱体绕流大涡模拟气动力特征流场结构

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Texas Tech University建筑模型龙卷风荷载试验研究

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建筑结构学报 2023年第5期44卷 10-17页

作者：杨含章曹曙阳操金鑫 SABAREESH G R 同济大学土木工程学院上海200092 同济大学土木工程防灾国家重点实验室上海200092 Department of Mechanical Engineering BITS-Pilani Hyderabad CampusJawahar Nagar 500078India

为了评估低矮建筑在龙卷风等局地强风下的风荷载,开展了几何缩尺比为1∶300的Texas Tech University(TTU)模型在物理模拟龙卷风气流下的外表面测压试验,研究不同位置与方位角下结构表面风压系数的均值、脉动值与峰值,以及结构的整体风... 详细信息

为了评估低矮建筑在龙卷风等局地强风下的风荷载,开展了几何缩尺比为1∶300的Texas Tech University(TTU)模型在物理模拟龙卷风气流下的外表面测压试验,研究不同位置与方位角下结构表面风压系数的均值、脉动值与峰值,以及结构的整体风力系数,并对比了低矮建筑结构龙卷风荷载与边界层风荷载的区别。结果表明:结构龙卷风荷载主要受切向气流和气压降作用影响,其大小随结构与龙卷风中心距离的不同而改变;当结构位于涡核半径时,所承受的局部风压和整体风力均达到最大,最不利值发生在近长边一侧的屋盖角部;结构表面中线上龙卷风荷载与边界层风作用下的荷载变化趋势具有一定相似性,但最不利荷载发生的位置有所不同。

关键词：低矮建筑 TTU建筑模型龙卷风龙卷风模拟器风荷载

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Dysfunction of synaptic endocytic trafficking in Parkinson's disease

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Neural Regeneration Research 2024年第12期19卷 2649-2660页

作者： Xin Yi Ng Mian cao Programme in Neuroscience and Behavioural Disorders Duke-NUS Medical SchoolSingaporeSingapore Department of Physiology National University of SingaporeSingaporeSingapore

Parkinson's disease is characterized by the selective degeneration of dopamine neurons in the nigrostriatal pathway and dopamine deficiency in the striatum.The precise reasons behind the specific degeneration of these dopamine neurons remain largely elusive.Genetic investigations have identified over 20 causative PARK genes and 90 genomic risk loci associated with both familial and sporadic Parkinson's disease.Notably,several of these genes are linked to the synaptic vesicle recycling process,particularly the clathrinmediated endocytosis pathway.This suggests that impaired synaptic vesicle recycling might represent an early feature of Parkinson's disease,followed by axonal degeneration and the eventual loss of dopamine cell bodies in the midbrain via a"dying back"mechanism.Recently,several new animal and cellular models with Parkinson's disease-linked mutations affecting the endocytic pathway have been created and extensively characterized.These models faithfully recapitulate certain Parkinson's disease-like features at the animal,circuit,and cellular levels,and exhibit defects in synaptic membrane trafficking,further supporting the findings from human genetics and clinical studies.In this review,we will first summarize the cellular and molecular findings from the models of two Parkinson's disease-linked clathrin uncoating proteins:auxilin(DNAJC6/PARK19)and synaptojanin 1(SYNJ1/PARK20).The mouse models carrying these two PARK gene mutations phenocopy each other with specific dopamine terminal pathology and display a potent synergistic effect.Subsequently,we will delve into the involvement of several clathrin-mediated endocytosis-related proteins(GAK,endophilin A1,SAC2/INPP5 F,synaptotagmin-11),identified as Parkinson's disease risk factors through genome-wide association studies,in Parkinson's disease pathogenesis.We will also explore the direct or indirect roles of some common Parkinson's disease-linked proteins(alpha-synuclein(PARK1/4),Parkin(PARK2),and LRRK2(PARK8))in synaptic endocytic trafficking.Additionall

关键词： autophagy auxilin/PARK19 clathrin-mediated endocytosis dopamine neurons neurodegeneration nigrostriatal pathway Parkinson's disease synaptic vesicle recycling synaptojanin1/PARK20

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Dynamic Setting Method of Assessment Indicators for Power Curves of Renewable Energy Sources Considering Scarcity of Reserve Resources

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Journal of Modern Power Systems and Clean Energy 2024年第1期12卷 101-114页

作者： Minghao cao Jilai Yu the Department of Electrical Engineering Harbin Institute of TechnologyHarbinChina

With the increasing proportion of renewable energy sources(RESs)in power grid,the reserve resource(RR)scarcity for correcting power deviation of RESs has become a potential issue.Consequently,the power curve of RES needs to be more rigorously assessed.The RR scarcity varies during different time periods,so the values of assessment indicators should be dynamically adjusted.The assessment indicators in this paper include two aspects,i.e.,deviation exemption ratio and penalty price.Firstly,this paper proposes a method for dynamically calculating the supply capacity and RR cost,primarily taking into account the operating status of thermal units,forecast information of RES,and load curve.Secondly,after clarifying the logical relationship between the degree of RR scarcity and the values of assessment indicators,this paper establishes a mapping function between them.Based on this mapping function,a dynamic setting method for assessment indicators is proposed.In the future,RES will generally be equipped with battery energy storage systems(BESSs).Reasonably utilizing BESSs to reduce the power deviation of RESs can increase the expected income of RESs.Therefore,this paper proposes a power curve optimization strategy for RESs considering self-owned BESSs.The case study demonstrates that the dynamic setting method of assessment indicators can increase the revenue of RESs while ensuring that the penalty fees paid by RESs to the grid are sufficient to cover the RR costs.Additionally,the power curve optimization strategy can help RESs further increase income and fully utilize BESSs to reduce power deviation.

关键词： Renewable energy battery energy storage system(BESS) power curve assessment reserve service parameter setting

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