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Ground settlement and tunnel response due to twin-curved shield tunnelling in soft ground with small clear distance

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第8期16卷 3122-3135页

作者： yao Hu Haoran Tang Yinggang Xu Huayang Lei Peng Zeng kai yao Yabo Dong State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of TechnologyChengdu610059China Research Center of Tunneling and Underground Engineering of Ministry of Education Beijing Jiaotong UniversityBeijing100044China College of Environment and Civil Engineering Chengdu University of TechnologyChengdu610059China School of Civil Engineering Tianjin UniversityTianjin300350China School of Qilu Transportation Shandong UniversityJinan250002China Power China Sinohydro Bureau 7 Co. Ltd.Chengdu610213China

Twin curved tunnels are often encountered in shield tunnelling,where significant complexities in densely exploited underground space are *** this study,the ground settlement and tunnel deformation due to twin-curved shield tunnelling in soft ground were investigated using numerical simulation and field *** curvature radii of twin curved tunnels and subsequent effects of tunnel construction were considered to reveal the tunnelling effect on ground surface settlement and tunnel *** results show that the settlement trough yields one offset towards inside of curved shield *** location of settlement trough and maximum settlement were affected by curvature radius but except for the shape and width of settlement *** parallel twin-curved shield tunnelling could increase the offset of existing settlement trough and maximum ***,an empirical prediction of surface settlement trough due to twin-curved shield tunnelling with same tunnel diameters in soft clay was proposed,which was applicable to curvature radius less than 800 ***,a minimum radius of 600 m of curvature tunnel was proposed in terms of allowable convergence deformation of *** result could provide guidance on safety evaluation for twin curved shield tunnelling construction.

关键词： Shield tunnelling Curvature radius Ground settlement Tunnel deformation Numerical simulation

Re-quantization based binary graph neural networks

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Science China(Information Sciences) 2024年第7期67卷 160-171页

作者： kai-Lang yao Wu-Jun LI National Key Laboratory for Novel Software Technology Department of Computer Science and TechnologyNanjing University

Binary neural networks have become a promising research topic due to their advantages of fast inference speed and low energy consumption. However, most existing studies focus on binary convolutional neural networks, while less attention has been paid to binary graph neural networks. A common drawback of existing studies on binary graph neural networks is that they still include lots of inefficient full-precision operations in multiplying three matrices and are therefore not efficient enough. In this paper, we propose a novel method, called re-quantization-based binary graph neural networks(RQBGN), for binarizing graph neural networks. Specifically, re-quantization, a necessary procedure contributing to the further reduction of superfluous inefficient full-precision operations, quantizes the results of multiplication between any two matrices during the process of multiplying three matrices. To address the challenges introduced by requantization, in RQBGN we first study the impact of different computation orders to find an effective one and then introduce a mixture of experts to increase the model capacity. Experiments on five benchmark datasets show that performing re-quantization in different computation orders significantly impacts the performance of binary graph neural network models, and RQBGN can outperform other baselines to achieve state-of-the-art performance.

关键词： graph neural networks binary neural networks mixture of experts computation-efficient algorithms

Associations between Geriatric Nutrition Risk Index,bone mineral density and body composition in type 2 diabetes patients

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World Journal of Diabetes 2024年第3期15卷 403-417页

作者： Xiao-Xiao Zhu kai-Feng yao Hai-Yan Huang Li-Hua Wang Department of Pediatrics The Second Affiliated Hospital of Nantong UniversityFirst People’s Hospital of Nantong CityNantong 226001Jiangsu ProvinceChina Department of Nursing The Second Affiliated Hospital of Nantong UniversityFirst People’s Hospital of Nantong CityNantong 226001Jiangsu ProvinceChina Department of Endocrinology The Second Affiliated Hospital of Nantong UniversityFirst People’s Hospital of Nantong CityNantong 226001Jiangsu ProvinceChina

BACKGROUND Type 2 diabetes mellitus(T2DM),a fast-growing issue in public health,is one of the most common chronic metabolic disorders in older *** and sarcopenia are highly prevalent in T2DM patients and may result in fractures and *** people with T2DM,the association between nutrition,sarcopenia,and osteoporosis has rarely been *** To evaluate the connections among nutrition,bone mineral density(BMD)and body composition in patients with *** We enrolled 689 patients with T2DM for this cross-sectional *** patients underwent dual energy X-ray absorptiometry(DXA)examination and were categorized according to baseline Geriatric Nutritional Risk Index(GNRI)values calculated from serum albumin levels and body *** GNRI was used to evaluate nutritional status,and DXA was used to investigate BMD and body *** forward linear regression analysis was used to identify the factors associated with BMD and skeletal muscle mass *** Of the total patients,394 were men and 295 were *** with patients in tertile 1,those in tertile 3 who had a high GNRI tended to be younger and had lower HbA1c,higher BMD at all bone sites,and higher appendicular skeletal muscle index(ASMI).These important trends persisted even when the patients were divided into younger and older *** GNRI was positively related to ASMI(men:r=0.644,P<0.001;women:r=0.649,P<0.001),total body fat(men:r=0.453,P<0.001;women:r=0.557,P<0.001),BMD at all bone sites,lumbar spine(L1-L4)BMD(men:r=0.110,P=0.029;women:r=0.256,P<0.001),FN-BMD(men:r=0.293,P<0.001;women:r=0.273,P<0.001),and hip BMD(men:r=0.358,P<0.001;women:r=0.377,P<0.001).After adjustment for other clinical parameters,the GNRI was still significantly associated with BMD at the lumbar spine and femoral ***,a low lean mass index and higherβ-collagen special sequence were associated with low BMD at all bone *** was negatively correlated with

关键词： Geriatric Nutrition Risk Index Bone mineral density Skeletal muscle mass Type 2 diabetes

Flexible pressure sensors with ultrahigh stress tolerance enabled by periodic microslits

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Microsystems & Nanoengineering 2024年第1期10卷 301-311页

作者： Song Wang Chenying Wang Yifan Zhao Yujing Zhang Yaxin Zhang Xiangyue Xu Qijing Lin kai yao Yuheng Wang Feng Han Yu Sun Zhuangde Jiang State Key Laboratory for Manufacturing Systems Engineering International Joint Laboratory for Micro/Nano Manufacturing and Measurement TechnologiesSchool of Mechanical EngineeringXi’an Jiaotong UniversityXi’anChina State Key Laboratory for Manufacturing Systems Engineering International Joint Laboratory for Micro/Nano Manufacturing and Measurement TechnologiesSchool of Instrument Science and TechnologyXi’an Jiaotong UniversityXi’anChina The Faculty of Electrical Engineering and Computer Science Ningbo UniversityNingboChina Department of Mechanical and Industrial Engineering University of TorontoTorontoCanada

Stress tolerance plays a vital role in ensuring the effectiveness of piezoresistive sensing films used in flexible pressure ***,existing methods for enhancing stress tolerance employ dome-shaped,wrinkle-shaped,and pyramidal-shaped microstructures in intricate molding and demolding processes,which introduce significant fabrication challenges and limit the sensing *** address these shortcomings,this paper presents periodic microslits in a sensing film made of multiwalled carbon nanotubes and polydimethylsiloxane to realize ultrahigh stress tolerance with a theoretical maximum of 2.477 MPa and a sensitivity of 18.092 kPa−*** periodic microslits permit extensive deformation under high pressure(e.g.,400 kPa)to widen the detection ***,the periodic microslits also enhance the sensitivity based on simultaneously exhibiting multiple synapses within the sensing interface and between the periodic sensing *** proposed solution is verified by experiments using sensors based on the microslit strategy for wind direction detection,robot movement sensing,and human health *** these experiments,vehicle load detection is achieved for ultrahigh pressure sensing under an ultrahigh pressure of over 400 kPa and a ratio of the contact area to the total area of 32.74%.The results indicate that the proposed microslit strategy can achieve ultrahigh stress tolerance while simplifying the fabrication complexity of preparing microstructure sensing films.

关键词： robot shaped stress

Surface Patterning of Metal Zinc Electrode with an In‑Region Zincophilic Interface for High‑Rate and Long‑Cycle‑Life Zinc Metal Anode

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Nano-Micro Letters 2024年第6期16卷 192-209页

作者： Tian Wang Qiao Xi kai yao Yuhang Liu Hao Fu Venkata Siva Kavarthapu Jun Kyu Lee Shaocong Tang Dina Fattakhova‑Rohlfing Wei Ai Jae Su Yu Department of Electronics and Information Convergence Engineering Institute for Wearable Convergence ElectronicsKyung Hee UniversityYongin‑siGyeonggi‑do 17104Republic of Korea Frontiers Science Center for Flexible Electronics(FSCFE)and Shaanxi Institute of Flexible Electronics(SIFE) Northwestern Polytechnical University(NPU)127 West Youyi RoadXi’an 710072People’s Republic of China Institute of Energy and Climate Research:Materials Synthesis and Processing(IEK‑1) Forschungszentrum Julich GmbH52425 JulichGermany School of Chemical Engineering Sungkyunkwan University2066 Seobu‑RoJangan‑GuSuwon‑siGyeonggi‑doRepublic of Korea

The undesirable dendrite growth induced by non-planar zinc(Zn)deposition and low Coulombic efficiency resulting from severe side reactions have been long-standing challenges for metallic Zn anodes and substantially impede the practical application of rechargeable aqueous Zn metal batteries(ZMBs).Herein,we present a strategy for achieving a high-rate and long-cycle-life Zn metal anode by patterning Zn foil surfaces and endowing a Zn-Indium(Zn-In)interface in the *** accumulation of electrons in the microchannel and the zincophilicity of the Zn-In interface promote preferential heteroepitaxial Zn deposition in the microchannel region and enhance the tolerance of the electrode at high current ***,electron aggregation accelerates the dissolution of non-(002)plane Zn atoms on the array surface,thereby directing the subsequent homoepitaxial Zn deposition on the array ***,the planar dendrite-free Zn deposition and long-term cycling stability are achieved(5,050 h at 10.0 mA cm^(−2) and 27,000 cycles at 20.0 mA cm^(−2)).Furthermore,a Zn/I_(2) full cell assembled by pairing with such an anode can maintain good stability for 3,500 cycles at 5.0 C,demonstrating the application potential of the as-prepared ZnIn anode for high-performance aqueous ZMBs.

关键词： Zn metal anode Surface patterning Directional Zn deposition Aqueous Zn-I_(2)batteries

竞合对创业企业韧性的影响——基于创业学习和制度资本的视角

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系统管理学报 2024年第4期33卷 1057-1068页

作者：张梦杰姚凯中山大学管理学院广州510275 复旦大学全球科创人才发展研究中心上海200433 复旦大学管理学院上海200433

VUCA(volatility, uncertainty, complexity, and ambiguity)时代,创业企业的生存与发展变得更为困难,而组织韧性是企业应对危机、逆势成长所需的关键能力。基于知识基础理论,探究创业生态系统情境下,创业企业如何在竞合活动中学习并构... 详细信息

VUCA(volatility, uncertainty, complexity, and ambiguity)时代,创业企业的生存与发展变得更为困难,而组织韧性是企业应对危机、逆势成长所需的关键能力。基于知识基础理论,探究创业生态系统情境下,创业企业如何在竞合活动中学习并构建组织韧性。从组织韧性的广义视角出发,利用结构方程模型,对479个样本数据进行分析。结果表明,竞合正向影响组织韧性,双元创业学习在竞合和组织韧性间发挥积极的中介作用,制度资本正向调节竞合-创业学习关系、负向调节竞合-组织韧性关系。研究结论将竞合扩展到组织韧性和创业生态系统领域,为广义视角下的组织韧性研究提供了新的视角,加深了对创业生态系统情境下知识基础理论的理解。

关键词：竞合组织韧性创业学习制度资本创业生态系统

Correction: Surface Patterning of Metal ZincElectrode with an In-Region Zincophilic Interfacefor High-Rate and Long-Cycle-Life Zinc MetalAnode

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Nano-Micro Letters 2024年第7期16卷 456-457页

作者： Tian Wang Qiao Xi kai yao Yuhang Liu Hao Fu Venkata Siva Kavarthapu Jun Kyu Lee Shaocong Tang Dina Fattakhova-Rohlfing Wei Ai Jae Su Yu Department of Electronics and Information Convergence Engineering Institute for Wearable Convergence ElectronicsKyung Hee UniversityYongin-siGyeonggi-do 17104Republic of Korea Frontiers Science Center for Flexible Electronics(FSCFE)and Shaanxi Institute of Flexible Electronics(SIFE) Northwestern Polytechnical University(NPU)127 West Youyi RoadXi’an 710072People’s Republic of China Institute of Energy and Climate Research:Materials Synthesis and Processing(IEK-1) Forschungszentrum Jülich GmbH52425 JülichGermany School of Chemical Engineering Sungkyunkwan University2066 Seobu-RoJangan-GuSuwon-siGyeonggi-doRepublic of Korea

Correction to:Nano-Micro Letters(2024)16:112 https://***/10.1007/s40820-024-01327-2 In the supplementary information the following corrections have been carried out:*** of Energy and Climate Research,Materials Synthesis and Processing,Forschungszentrum Jülich GmbH,52425 Jülich,***:Institute of Energy and Climate Research:Materials Synthesis and Processing(IEK-1),Forschungszentrum Jülich GmbH,52425 Jülich,Germany.

关键词： correction Zinc Electrode

不同变形方式β型Ti-Mo-Fe合金的低周疲劳性能

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材料工程 2024年第8期52卷 130-141页

作者：李纵纵闵小华毛永换姚凯大连理工大学材料科学与工程学院辽宁大连116024

利用OM,SEM,EBSD和电液伺服疲劳试验机等研究不同塑性变形方式的Ti-10Mo-xFe(x=1,2,3,质量分数/%)合金的低周疲劳性能,分析总应变幅(Δε_(t)/2=0.5%,1.0%和1.5%)和Fe含量对合金力学响应、组织结构和疲劳裂纹扩展行为的影响。结果表明:... 详细信息

利用OM,SEM,EBSD和电液伺服疲劳试验机等研究不同塑性变形方式的Ti-10Mo-xFe(x=1,2,3,质量分数/%)合金的低周疲劳性能,分析总应变幅(Δε_(t)/2=0.5%,1.0%和1.5%)和Fe含量对合金力学响应、组织结构和疲劳裂纹扩展行为的影响。结果表明:随着应变幅和Fe含量的增加,合金的低周疲劳性能下降。各合金的循环应力响应行为普遍表现为初始循环硬化,随后趋于循环稳定或轻微的循环软化,直至断裂失效。Ti-10Mo-1Fe合金的塑性变形由{332}〈113〉孪生主导,随着Fe含量的增加,合金的塑性变形方式向位错滑移转变。低应变幅下Ti-10Mo-1Fe合金疲劳源区孪晶数量较少,沿裂纹扩展方向孪晶数量逐渐增加;高应变幅下近断口区域出现大量孪晶。Ti-10Mo-1Fe合金中孪晶的大量产生及交割将晶粒内部分割成网状组织,从而起到细化晶粒的作用,有效释放应力集中并延缓疲劳裂纹的萌生。同时微裂纹扩展至孪晶界附近时发生裂纹偏折,合金中大量的孪晶界有效延长疲劳裂纹扩展路径。

关键词： β型钛合金低周疲劳孪生诱发塑性效应 {332}〈113〉孪生位错滑移

城市复兴下古城更新的创意设计策略——以苏州市姑苏区平江历史街区大儒巷为例

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建筑设计管理 2024年第1期41卷 73-79页

作者：姚恺苏州园林设计院股份有限公司江苏苏州215000

城市复兴最早是欧洲为了应对全球竞争和实现可持续发展所提出的理论,它对我国古城的更新设计与发展有着指导性的作用。新时期,城市复兴被广泛应用于我国不同城市中的城市更新设计、城市再开发、城市再生等过程中,能有效改善城市环境,恢... 详细信息

城市复兴最早是欧洲为了应对全球竞争和实现可持续发展所提出的理论,它对我国古城的更新设计与发展有着指导性的作用。新时期,城市复兴被广泛应用于我国不同城市中的城市更新设计、城市再开发、城市再生等过程中,能有效改善城市环境,恢复城市的发展活力。为此,通过城市复兴的更新设计概念入手,以苏州市姑苏区平江历史街区大儒巷为例,了解大儒巷更新设计项目的相关背景,重点剖析基于城市复兴理念下的古城更新设计策略,旨在促进苏州古城的新生,继而获得更好的经济与社会效益。

关键词：城市复兴古城更新设计大儒巷