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Investigation of stress distribution and damage behavior caused by forced installation of a composite bolted joint with a hole-location error

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Chinese Journal of Aeronautics 2024年第1期37卷 201-217页

作者： Chinan liU Yuan li Yi CHENG An’an ZHAO kunpeng DU Yue SHI Ximing li Hui CHENG School of Mechanical Engineering Northwestern Polytechnical UniversityXi’an 710072China AVIC Xi’an Aircraft Industry Group Company LTD Xi’an 710089China

In this paper,the influence of forced installation caused by a hole-location error on the 3D stress distribution and damage of a composite bolted joint is investigated.An analytical model of stress distributed on composite holes is promoted,in view of non-uniform extrusion caused by forced installation.At first,non-uniform extrusion of the hole edge caused by forced installation is analyzed.According to the contact state,expression of hole deformation is given.Then,based on Hertz theory,the maximum extrusion load is obtained with help of deformation expression.By constructing an elastic foundation beam model,3D stress distributed on a hole could be analyzed according to the extrusion load.Then,stress distribution predicted by the above analytical method is compared with that provided by FE considering composite damage.Finally,a forced installation experiment is carried out to analyze the damage distribution of the joint.Results show that a central-symmetrically distributed stress is introduced by the hole-location error.With an increment of the error,strength of composite decreases due to extrusion damage.Therefore,stress presents a concave distribution on the hole.As the hole-location error exceeding 3%,stress decreases gradually due to failure of composite.Damage of holes does not exhibit a centrosymmetric distribution.Serious damage is mainly distributed on the entrance of the hole at the lower sheet.

关键词： Hole-location error Composite joint Forced installation Stress distribution Damage

Solubility of iron(Ⅲ) and nickel(Ⅱ) acetylacetonates in supercritical carbon dioxide

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Chinese Journal of Chemical Engineering 2024年第1期65卷 29-34页

作者： Haixin Sun Jianlei Qi Jianfei Sun lin li kunpeng Yu Jintao Wu Jianzhong Yin State Key Laboratory of Fine Chemicals School of Chemical EngineeringDalian University of TechnologyDalian 116024China College of Chemical Engineering Inner Mongolia University of TechnologyHohhot 010051China

As a common precursor for supercritical CO_(2)(scCO_(2))deposition techniques,solubility data of organometallic complexes in scCO_(2)is crucial for the preparation of nanocomposites.Recently,metal acetylacetonates have shown great potential for the preparation of single-atom catalytic materials.In this study,the solubilities of iron(Ⅲ)acetylacetonate(Fe(acac)3)and nickel(Ⅱ)acetylacetonate(Ni(acac)2)were measured at the temperature from 313.15 to 333.15 K and in the pressure range of 9.5–25.2 MPa to accumulate new solubility data.Solubility was measured using a static weight loss method.The semi-empirical models proposed by Chrastil and Sung et al.were used to correlate the solubility data of Fe(acac)3 and Ni(acac)2.The equations obtained can be used to predict the solubility of the same system in the experimental range.

关键词： Iron(III)acetylacetonate Nickel(II)acetylacetonate Supercritical carbon dioxide Solubility measurement Correlation model Phase equilibrium

A novel electro-Fenton hybrid system for enhancing the interception of volatile organic compounds in membrane distillation desalination

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Journal of Environmental Sciences 2024年第4期138卷 189-199页

作者： Hongxin liu Kuiling li kunpeng Wang Zhiyong Wang Zimou liu Sichao Zhu Dan Qu Yu Zhang Jun Wang State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua UniversityBeijing 100084China School of Chemical and Environmental Engineering Beijing CampusChina University of Mining and TechnologyBeijing 100083China Beijing Key Lab for Source Control Technology of Water Pollution College of Environmental Science and EngineeringBeijing Forestry UniversityBeijing 100083China

Membrane distillation(MD)is a promising alternative desalination technology,but the hydrophobic membrane cannot intercept volatile organic compounds(VOCs),resulting in aggravation in the quality of permeate.In term of this,electro-Fenton(EF)was coupled with sweeping gas membrane distillation(SGMD)in a more efficient way to construct an advanced oxidation barrier at the gas-liquid interface,so that the VOCs could be trapped in this layer to guarantee the water quality of the distillate.During the so-called EF-MD process,an interfacial interception barrier containing hydroxyl radical formed on the hydrophobic membrane surface.It contributed to the high phenol rejection of 90.2% with the permeate phenol concentration lower than 1.50 mg/L.Effective interceptions can be achieved in a wide temperature range,even though the permeate flux of phenol was also intensified.The EF-MD system was robust to high salinity and could electrochemically regenerate ferrous ions,which endowed the long-term stability of the system.This novel EF-MD configuration proposed a valuable strategy to intercept VOCs in MD and will broaden the application of MD in hypersaline wastewater treatment.

关键词： Membrane distillation VOC interception Interfacial oxidation Electro-Fenton Hypersaline wastewater

CAV driving safety monitoring and warning via V2X-based edge computing system

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Frontiers of Engineering Management 2024年第1期11卷 107-127页

作者： Cheng CHANG Jiawei ZHANG kunpeng ZHANG Yichen ZHENG Mengkai SHI Jianming HU Shen li li li Department of Automation Tsinghua UniversityBeijing 100084China College of Electrical Engineering Henan University of TechnologyZhengzhou 450001China Nebula link Technology Co. Ltd.Beijing 100080China Department of Civil Engineering Tsinghua UniversityBeijing 100084China

Driving safety and accident prevention are attracting increasing global interest.Current safety monitoring systems often face challenges such as limited spatiotemporal coverage and accuracy,leading to delays in alerting drivers about potential hazards.This study explores the use of edge computing for monitoring vehicle motion and issuing accident warnings,such as lane departures and vehicle collisions.Unlike traditional systems that depend on data from single vehicles,the cooperative vehicle-infrastructure system collects data directly from connected and automated vehicles(CAVs)via vehicle-to-everything communication.This approach facilitates a comprehensive assessment of each vehicle’s risk.We propose algorithms and specific data structures for evaluating accident risks associated with different CAVs.Furthermore,we examine the prerequisites for data accuracy and transmission delay to enhance the safety of CAV driving.The efficacy of this framework is validated through both simulated and real-world road tests,proving its utility in diverse driving conditions.

关键词： driving safety accident prevention connected and automated vehicles edge computing

Role-Based Network Embedding via Quantum Walk with Weighted Features Fusion

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Computers, Materials & Continua 2023年第8期76卷 2443-2460页

作者： Mingqiang Zhou Mengjiao li Zhiyuan Qian kunpeng li College of Computer Science Chongqing UniversityChongqing400044China

Role-based network embedding aims to embed role-similar nodes into a similar embedding space,which is widely used in graph mining tasks such as role classification and detection.Roles are sets of nodes in graph networks with similar structural patterns and functions.However,the rolesimilar nodes may be far away or even disconnected from each other.Meanwhile,the neighborhood node features and noise also affect the result of the role-based network embedding,which are also challenges of current network embedding work.In this paper,we propose a Role-based network Embedding via Quantum walk with weighted Features fusion(REQF),which simultaneously considers the influence of global and local role information,node features,and noise.Firstly,we capture the global role information of nodes via quantum walk based on its superposition property which emphasizes the local role information via biased quantum walk.Secondly,we utilize the quantum walkweighted characteristic function to extract and fuse features of nodes and their neighborhood by different distributions which contain role information implicitly.Finally,we leverage the Variational Auto-Encoder(VAE)to reduce the effect of noise.We conduct extensive experiments on seven real-world datasets,and the results show that REQF is more effective at capturing role information in the network,which outperforms the best baseline by up to 14.6% in role classification,and 23% in role detection on average.

关键词： Role-based network embedding quantum walk quantum walk weighted characteristic function complex networks

DADOS:A Cloud-based Data-driven Design Optimization System

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Chinese Journal of Mechanical Engineering 2023年第2期36卷 50-66页

作者： Xueguan Song Shuo Wang Yonggang Zhao Yin liu kunpeng li School of Mechanical Engineering Dalian University of TechnologyDalian 116024China AECC Shenyang Engine Research Institute Shenyang 110015China

This paper presents a cloud-based data-driven design optimization system,named DADOS,to help engineers and researchers improve a design or product easily and efficiently.DADOS has nearly 30 key algorithms,including the design of experiments,surrogate models,model validation and selection,prediction,optimization,and sensitivity analysis.Moreover,it also includes an exclusive ensemble surrogate modeling technique,the extended hybrid adaptive function,which can make use of the advantages of each surrogate and eliminate the effort of selecting the appropriate individual surrogate.To improve ease of use,DADOS provides a user-friendly graphical user interface and employed flow-based programming so that users can conduct design optimization just by dragging,dropping,and connecting algorithm blocks into a workflow instead of writing massive code.In addition,DADOS allows users to visualize the results to gain more insights into the design problems,allows multi-person collaborating on a project at the same time,and supports multi-disciplinary optimization.This paper also details the architecture and the user interface of DADOS.Two examples were employed to demonstrate how to use DADOS to conduct data-driven design optimization.Since DADOS is a cloud-based system,anyone can access DADOS at *** using their web browser without the need for installation or powerful hardware.

关键词： Data-driven Optimization Cloud-based software Design of experiments Surrogate model

Systemic lupus erythematosus following human papillomavirus 9-valent vaccination

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Chinese Medical Journal 2022年第15期135卷 1864-1866页

作者： Yuehua Wan Jinshui Yang Yurong Zhao Jingyu Jin Jian Zhu kunpeng li Jianglin Zhang Department of Rheumatology and Immunology The First Medical CentreChinese PLA General HospitalBeijing 100853China

To the Editor:Systemic lupus erythematosus(SLE)is a chronic autoimmune disease of unknown cause that can affect any organ of the body.Human papillomavirus(HPV)infection is associated with the development of cervical dysplasia and cancer in SLE patients.HPV vaccines can effectively prevent HPV infection and subsequent HPV-related diseases.

关键词： erythematosus lupus Systemic

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论新时代实现共同富裕的法治保障

学术研究 2024年第4期 57-66,177页

作者：石佑启李坤朋广东外语外贸大学法学院广东广州510420 中南财经政法大学法学院湖北武汉430073

实现共同富裕是中国特色社会主义的本质要求,是全体人民的共同期盼。共同富裕与法治高度关联,二者在价值取向与目标追求上具有一致性。共同富裕表征为人民对美好生活权的需求及其对该权利的保障,丰富了新时代人权的法理内涵,推动着良法... 详细信息

实现共同富裕是中国特色社会主义的本质要求,是全体人民的共同期盼。共同富裕与法治高度关联,二者在价值取向与目标追求上具有一致性。共同富裕表征为人民对美好生活权的需求及其对该权利的保障,丰富了新时代人权的法理内涵,推动着良法善治的法治实践。法治为共同富裕提供方向指引、夯实制度根基、创造良好环境。新时代实现共同富裕,需要完善共同富裕的法律规范体系、全面推进严格规范公正文明执法、全面推进公正司法、依法促进和保障人的全面发展,充分发挥法治固共同富裕之根本、稳共同富裕之预期、利共同富裕之长远的的保障作用,切实将制度优势转变为治理效能。

关键词：新时代共同富裕美好生活权公平正义法治保障

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基于多因素分析的机场任务指派建模与仿真

运筹与管理 2024年第2期33卷 1-8页

作者：田倩南李杰李昆鹏郭群湖北经济学院湖北物流发展研究中心湖北武汉430205 湖北经济学院湖北企业文化研究中心湖北武汉430205 华中科技大学管理学院湖北武汉430074

机场任务指派问题是一个复杂的组合优化问题,属于NP-hard问题。本文研究了考虑任务部分覆盖率、资格匹配度等多因素的指派问题,通过分析研究问题,建立整数规划模型,对模型进行分析并提出有效不等式,应用CPLEX优化软件对不同因素的实际... 详细信息

机场任务指派问题是一个复杂的组合优化问题,属于NP-hard问题。本文研究了考虑任务部分覆盖率、资格匹配度等多因素的指派问题,通过分析研究问题,建立整数规划模型,对模型进行分析并提出有效不等式,应用CPLEX优化软件对不同因素的实际数据进行仿真测试,数值实验结果表明:1)该模型的可行性与有效性;2)对不同规模的实际数据求解发现,即使覆盖率设置高达80%,目标函数的均值依然提高9.6%;当同时考虑资格匹配度时,目标函数均值也能提高6.98%;3)对考虑不同属性因素数据的测试结果对比发现,降低任务对资格的要求对目标函数产生的影响最大,目标函数均值增加量高达27.96%,从而对任务完成率影响更直观。研究可以有效提高机场的运行效率和任务完成率,为企业实际运营决策提供科学依据。

关键词：任务部分覆盖率 NP-hard问题整数规划模型 CPLEX优化软件