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Adjoint-based robust optimization design of laminar flow wing under flight condition uncertainties

Chinese Journal of Aeronautics 2023年第6期36卷 19-34页

作者： Yifu CHEN Hanyue RAO Yiju DENG Tihao YANG yayun SHI Junqiang BAI School of Aeronautics Northwestern Polytechnical UniversityXi’an 710072China The First Aircraft Design and Research Institute Xi’an 710089China State Key Laboratory for Strength and Vibration of Mechanical Structures School of Aerospace EngineeringXi’an Jiaotong UniversityXi’an 710049China

It is an inherent uncertainty problem that the application of laminar flow technology to the wing of large passenger aircraft is affected by flight *** order to seek a more robust natural laminar flow control effect,it is necessary to develop an effective optimization design ***,attention must be given to the impact of crossflow(CF)instability brought on by the sweep *** paper constructs a robust optimization design framework based on discrete adjoint methods and non-intrusive polynomial *** prediction is implemented by coupled Reynolds-Averaged Navier-Stokes(RANS)and simplified e^(N)method,which can consider both Tollmien-Schlichting(TS)wave and crossflow vortex *** have performed gradient enhancement processing on the general Polynomial Chaos Expansion(PCE),which is advantageous to reduce the computational cost of single uncertainty *** processing takes advantage of the gradient information obtained by solving the coupled adjoint equations considering *** statistical moment gradient solution used for the robust optimization design also uses the derivatives of coupled adjoint *** framework is applied to the robust design of a 25°swept wing with infinite span in transonic *** uncertainty quantification and sensitivity analysis on the baseline wing shows that the uncertainty quantification method in this paper has high accuracy,and qualitatively reveals the factors that dominate in different flow field *** the robust optimization design,the mean and standard deviation of the drag coefficient can be reduced by 29%and 45%,respectively,and compared with the deterministic optimization design results,there is less possibility of forming shock waves under flight condition *** optimization results illustrate the trade-off between the transition delay and the wave drag reduction.

关键词： Adjoint method Gradient-based optimization Laminar-turbulent transition Robust design Uncertainty propagation

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A distributed real-time data prediction framework for large-scale time-series data using stream processing

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International Journal of Intelligent Computing and Cybernetics 2017年第2期10卷 145-165页

作者： Kehe Wu yayun Zhu Quan Li Ziwei Wu School of Control and Computer Engineering North China Electric Power UniversityBeijingChina

Purpose-The purpose of this paper is to propose a data prediction framework for scenarios which require forecasting demand for large-scale data sources,e.g.,sensor networks,securities exchange,electric power secondary system,***,the proposed framework should handle several difficult requirements including the management of gigantic data sources,the need for a fast self-adaptive algorithm,the relatively accurate prediction of multiple time series,and the real-time ***/methodology/approach-First,the autoregressive integrated moving average-based prediction algorithm is ***,the processing framework is designed,which includes a time-series data storage model based on the HBase,and a real-time distributed prediction platform based on ***,the work principle of this platform is ***,a proof-of-concept testbed is illustrated to verify the proposed ***-Several tests based on Power Grid monitoring data are provided for the proposed *** experimental results indicate that prediction data are basically consistent with actual data,processing efficiency is relatively high,and resources consumption is ***/value-This paper provides a distributed real-time data prediction framework for large-scale time-series data,which can exactly achieve the requirement of the effective management,prediction efficiency,accuracy,and high concurrency for massive data sources.

关键词： Prediction Real-time Autoregressive integrated moving average Storm Stream processing Time series

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An ion-released MgI_(2)-doped separator inducing a LiI-containing solid electrolyte interphase for dendrite-free Li metal anodes

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Journal of Energy Chemistry 2022年第12期75卷 83-94,I0003页

作者： Shan Yi Zhe Su Wanyu Zhang Hongli Chen yayun Zhang Bo Niu Donghui Long State Key Laboratory of Chemical Engineering East China University of Science and TechnologyShanghai 200237China Key Laboratory for Specially Functional Materials and Related Technology of the Ministry of Education East China University of Science and TechnologyShanghai 200237China

Lithium metal batteries are among the strong contenders to satisfy the ever-increasing needs of energy storage systems,which however suffer from poor composition of the solid electrolyte interphase(SEI)layer and uncontrolled Li dendrites *** this regard,we report on the design of an ionreleased MgI_(2)-doped polyacrylonitrile(PAN)based nanofiber(MPANF)separator,which can lead to conducive SEI layer and dendrite-free Li *** combination of the lithophilic MgI_(2)nanoparticles with polarized PAN matrix comprehensively functions as a high-compatible interpenetrating network to homogenize ionic transportation and confront dendrite *** released I ions introduce the highion-conductivity LiI into SEI layer,which could induce the formation of favorable and protective interface layer in the early stage,as embodied in the enrichment of advantageous components such as LiN_(x)O_(y),Li_(2)O,LiF,and Li_(3)*** from the high-affinity MPANF separator,the Li||Li symmetric cell achieves an ultralow voltage hysteresis of 46 mV with an extended lifespan of 580 *** a prolonged lifetime of 590cycles with an enhanced specific capacity of 140.1 m Ah g^(-1)and the Coulombic efficiency of 96.2%at 1C can be obtained in full *** work may offer a facile and high-affinity alternative to traditional polymeric separators for high-performance and dendrite-free Li metal batteries.

关键词： Lithium metal anode LiI-containing layer Dendrite-free anode Electrospun nanofiber separator

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Fusion of clathrin and caveolae endocytic vesicles revealed by line-switching dual-color STED microscopy

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Journal of Innovative Optical Health Sciences 2021年第6期4卷 71-80页

作者： Hefei Ruan Jianqiang Yu yayun Wu Xiaojun Tang Jinghe Yuan Xiaohong Fang Beijing National Laboratory for Molecular Sciences Key Laboratory of Molecular Nanostructure and Nanotechnology Institute of Chemistry Chinese Academy of SciencesBeijing 100190P.R.China University of Chinese Academy of Sciences Beijing 100049P.R.China

Clathrin-and caveolae-mediated endocytosis are the most commonly used pathways for the internalization of cell membrane ***,due to their dimensions are within the diffraction limit,traditional fluorescence microscopy cannot distinguish them and little is known about their interactions underneath cell *** this study,we proposed the line-switching scanning imaging mode for dual-color triplet-state relaxation(T-Rex)stimulated emission depletion(STED)super-resolution *** this line-switching mode,the cross-talk between the two channels,the side effects from pulse picker and image drift in frame scanning mode can be effectively *** dual-color super-resolution imaging results in mixed fluorescent beads validated the excellent *** this super-resolution microscope,not only the ring-shaped structure of clathrin and caveolae endocytic vesicles,but also their semi-fused structures underneath the cell membrane were distinguished *** resultant infor-mation will greatly facilitate the study of clathrin-and caveolae-mediated receptor endocytosis and signaling process and also our home-built dual-color T-Rex STED microscope with this line-switching imaging mode provides a precise and convenient way to study subcellular-scale protein interactions.

关键词： Super-resolution microscopy STED dual-color endocytosis line-switching

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Security Protection Method of Energy Internet with Android

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Wuhan University Journal of Natural Sciences 2022年第1期27卷 11-16页

作者： ZHU yayun JIANG Lin YUAN Anqi YUAN Yinghao China Electric Power Research Institute Beijing 100192China School of Cyber Science and Engineering Wuhan UniversityWuhan 430072HubeiChina

As a product of the combination of information and energy technology,the energy internet is enormous and complex,and the absence of security safeguards at any aspect of it can cause incalculable *** at the problems that Energy Internet terminals are difficult to be trusted and the integrity of massive terminals cannot be guaranteed,this paper designs and implements a set of comprehensive credibility measures and security protection schemes,isolates various malicious operations,and ensures that the system is always in a credible ***,we develop a secure TF card control program in the Android terminal application layer to realize the overall security *** results prove that this security protection scheme can effectively detect illegal application packages in energy Internet terminal devices,resist malicious programs,and protect key data from theft at the same time,achieving security protection in the“thing-to-thing”interconnection scenario of the Energy Internet.

关键词： Energy Internet trusted execution environment Android terminal secure TF card

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The cancer-testis gene,MEIOB,sensitizes triple-negative breast cancer to PARP1 inhibitors by inducing homologous recombination deficiency

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Cancer Biology & Medicine 2021年第1期18卷 74-87页

作者： yayun Gu Cheng Wang Rongxuan Zhu Jianshui Yang Wenwen Yuan Yanhui Zhu Yan zhou Na Qin Hongbing Shen Hongxia Ma Hongxia Wang Xiaoan Liu Zhibin Hu State Key Laboratory of Reproductive Medicine Center for Global HealthSchool of Public HealthNanjing Medical UniversityNanjing 211166China Jiangsu Key Lab of Cancer Biomarkers Prevention and TreatmentJiangsu Collaborative Innovation Center for Cancer Personalized MedicineNanjing Medical UniversityNanjing 211116China Department of Bioinformatics School of Biomedical Engineering and InformaticsNanjing Medical UniversityNanjing 211166China Department of Oncology Shanghai General HospitalShanghai Jiao Tong University School of MedicineShanghai 200080China Department of Breast Surgery The First Affiliated Hospital with Nanjing Medical UniversityNanjing 210029China

Objective:The newly defined cancer-testis(CT)gene,MEIOB,was previously found to play key roles in DNA double-strand break(DSB)*** this study,we aimed to investigate the effects and mechanisms of MEIOB in the carcinogenesis of triple-negative breast cancers(TNBCs).Methods:The Cancer Genome Atlas database was used to quantify the expression of *** regression analysis was used to evaluate the association between MEIOB expression and the prognosis of human *** effects of MEIOB on cell proliferation and migration in TNBCs were also assessed in ***-derived xenograft(PDX)models were used to assess the sensitivity of breast cancers with active MEIOB to PARP1 ***:We confirmed MEIOB as a CT gene whose expression was restricted to the testes and breast tumors,especially *** activation was significantly associated with poor survival in breast cancer patients[overall,hazard ratio(HR)=1.90(1.16–2.06);TNBCs:HR=7.05(1.16–41.80)].In addition,we found that MEIOB was oncogenic and significantly promoted the proliferation of TNBC *** analysis showed that MEIOB participated in DSB repair in ***,in contrast to its function in meiosis,it mediated homologous recombination deficiency(HRD)through the activation of poly ADP-ribose polymerase(PARP)1 by interacting with ***,activated MEIOB was shown to confer sensitivity to PARP inhibitors,which was confirmed in PDX ***:MEIOB played an oncogenic role in TNBC through its involvement in *** addition,dysregulation of MEIOB sensitized TNBC cells to PARP inhibitors,so MEIOB may be a therapeutic target of PARP1 inhibitors in TNBC.

关键词： Cancer-testis gene MEIOB triple-negative breast cancer PARP1 inhibitor cell proliferation

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Obstacle-free Workspace based Path Planning for Serial Manipulator 36

Obstacle-free Workspace based Path Planning for Serial Manip...

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第36届中国控制会议

作者： Yi Cao Mengshi Guo yayun Li School of Electrical Engineering Henan University of Technology

ISBN: (纸本)9781538629185

A path planning method based on an Obstacle-free workspace（abbreviated as OFW） is proposed for collision-free movements of multi-joint serial ***,based on Monte Carlo and computer graphics,the planning path for a three revolute joints（3R） planar manipulator was created in the ***,the path of a spatial manipulator was obtained by taking advantage of the rapidly-exploring random tree（RRT） method within the ***,the corresponding algorithms were described in the frame of mathematical set and the paths illustrated in a series of *** the manipulators,the 3R planar and the spatial,were modeled by the D-H coordinates method in MATLAB Robotics Toolbox.

关键词： Obstacle-free workspace(OFW) Path planning Robot manipulator Mathematical set Computer graphics

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Zein as a structural protein in gluten-free systems:an overview

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Food Science and Human Wellness 2021年第3期10卷 270-277页

作者： Xinrui Zhang Chunxia Dong yayun Hu Mengnan Gao Guangzhong Luan College of Food Science and Engineering Northwest A&F UniversityYangling 712100China

Zein,a class of alcohol-soluble prolamines in maize endosperm,is mainly composed of α-zein,β-zein,andγ-*** has been recognized as a structural protein for various gluten-free systems since it can form glutenlike viscoelastic *** formation of viscoelastic zein network can make up for the structural defect of gluten-free doughs caused by the lack of *** make the most of structural functionality of zein in glutenfree foods,it is important to clearly elucidate the fundamental properties of zein *** this article,these properties have been discussed,analyzed and summarized from the relationship between protein network and structural functionality of zein,the feature and formation mechanism of zein network,factors affecting zein network and the applications of zein network in improving the quality of gluten-free *** addition,this article also looks forward to potential research areas on zein network.

关键词： Zein Gluten-free Network Glass transition

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Advancing high-speed train gearbox durability:enhanced bearing load and contact stress through transition from helical to herringbone gears

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Railway Engineering Science 2024年第4期32卷 461-479页

作者： Hao Wu Jing Wei Pingbo Wu Fansong Li yayun Qi School of Mechanical Engineering Southwest Jiaotong UniversityChengdu 610031China College of Mechanical and Vehicle Engineering Chongqing UniversityChongqing 400044China State Key Laboratory of Rail Transit Vehicle System Southwest Jiaotong UniversityChengdu 610034China School of Mechanotronics and Vehicle Engineering Chongqing Jiaotong UniversityChongqing 400074China

High-speed trains typically utilize helical gear transmissions,which significantly impact the bearing load capacity and fatigue service performance of the gearbox *** paper focuses on the gearbox bearings,establishing dynamic models for both helical gear and herringbone gear transmissions in high-speed *** modeling particularly emphasizes the precision of the bearings at the gearbox's pinion and gear *** this model,a comparative analysis is conducted on the bearing loads and contact stresses of the gearbox bearings under uniform-speed operation between the two gear *** findings reveal that the helical gear transmission generates axial forces leading to severe load imbalance on the bearings at both sides of the large gear,and this imbalance intensifies with the increase in train ***,this results in a significant increase in contact stress on the bearings on one *** adoption of herringbone gear transmission effectively suppresses axial forces,resolving the load imbalance issue and substantially reducing the contact stress on the originally biased side of the *** study demonstrates that employing herringbone gear transmission can significantly enhance the service performance of high-speed train gearbox bearings,thereby extending their service life.

关键词： High-speed train Herringbone gear Helical gear Gearbox bearings Contact stress

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低压变频调速器在丙烷气体压缩机中的应用

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电工技术 2009年第6期 47-47页

作者：杨红梅江俊锋周雅云河南南阳油田石蜡精细化工厂电修车间河南南阳473132

分析低压变频调速器在丙烷气体压缩机控制系统中应用时存在的问题,并介绍加装变频调速器进行改造的效果。

关键词：低压变频调速器丙烷气体压缩机沥青装置

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