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China Ocean Engineering 2024年第2期38卷 297-312页

作者： ZHANG Yi CHEN Yue yun lai LIANG Xu Ocean College Zhejiang UniversityZhoushan 316000China Hainan Institute Zhejiang UniversitySanya 572000China

This paper aims to enhance the compression capacity of underwater cylindrical shells by adopting the corrugated sandwich structure of *** cuttlebone suffers uniaxial external compression,while underwater cylindrical shells are in a biaxial compressive stress *** suit the biaxial compressive stress state,a novel bidirectional corrugated sandwich structure is proposed to improve the bearing capacity of cylindrical *** static and buckling analysis for the sandwich shell and the unstiffened cylindrical shell with the same volume-weight ratio are studied by numerical *** is indicated that the proposed sandwich shell can effectively reduce the ratio between circumferential and axial stress from 2 to 1.25 and improve the critical buckling load by about 1.63 *** simulation shows that optimizing and adjusting the structural parameters could significantly improve the advantage of the sandwich ***,the hydrostatic pressure tests for shell models fabricated by 3D printing are carried *** to the experimental results,the overall failure position of the sandwich shell is at the center part of the sandwich *** has been found the average critical load of the proposed sandwich shell models exceeds two times that of the unstiffened shell ***,the proposed bio-inspired bidirectional corrugated sandwich structure can significantly enhance the pressure resistance capability of cylindrical shells.

关键词： bio-inspiration bidirectional corrugation sandwich shell external pressure buckling

Inverse design of nonlinear phononic crystal configurations based on multi-label classification learning neural networks

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Chinese Physics B 2024年第10期33卷 295-301页

作者： Kunqi Huang Yiran Lin yun lai Xiaozhou Liu Key Laboratory of Modern Acoustics Institute of AcousticsNanjing UniversityNanjing 210093China School of Physics Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China State Key Laboratory of Acoustics Institute of AcousticsChinese Academy of SciencesBeijing 100190China

Phononic crystals,as artificial composite materials,have sparked significant interest due to their novel characteristics that emerge upon the introduction of *** these properties,second-harmonic features exhibit potential applications in acoustic frequency conversion,non-reciprocal wave propagation,and non-destructive *** manipulating the harmonic band structure presents a major challenge in the design of nonlinear phononic *** design approaches based on parameter adjustments to meet specific application requirements are inefficient and often yield suboptimal ***,this paper develops a design methodology using Softmax logistic regression and multi-label classification learning to inversely design the material distribution of nonlinear phononic crystals by exploiting information from harmonic transmission *** results demonstrate that the neural network-based inverse design method can effectively tailor nonlinear phononic crystals with desired *** work establishes a mapping relationship between the band structure and the material distribution within phononic crystals,providing valuable insights into the inverse design of metamaterials.

关键词： multi-label classification learning nonlinear phononic crystals inverse design

Finite barrier bound state

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Light(Science & Applications) 2024年第4期13卷 664-671页

作者： Tao Liu Kai Bai Yicheng Zhang Duanduan Wan yun lai C.T.Chan Meng Xiao Key Laboratory of Artificial Micro-and Nano-structures of Ministry of Education and School of Physics and Technology Wuhan University430072 WuhanChina. National Laboratory of Solid State Microstructures School of Physicsand Collaborative Innovation Center of Advanced MicrostructuresNanjing University210093 NanjingChina. Department of Physics The Hong Kong University of Science and TechnologyClear Water BayKowloon999077Hong KongChina. Wuhan Institute of Quantum Technology 430206 WuhanChina

A boundary mode localized on one side of a finite-size lattice can tunnel to the opposite side which results in unwanted *** wisdom tells that the tunneling probability decays exponentially with the size of the system which thus requires many lattice sites before eventually becoming negligibly *** we show that the tunneling probability for some boundary modes can apparently vanish at specific ***,similar to bound states in the continuum,a boundary mode can be completely trapped within very few lattice sites where the bulk bandgap is not even *** intriguingly,the number of trapped states equals the number of lattice sites along the normal direction of the *** provide two configurations and validate the existence of this peculiar finite barrier-bound state experimentally in a dielectric photonic crystal at microwave *** work offers extreme flexibility in tuning the coupling between localized states and channels as well as a new mechanism that facilitates unprecedented manipulation of light.

关键词： boundary state eventually

Prognostic Nutritional Index Associates with the Severity of Silicosis:A Study from a Tertiary Class A Prevention and Treatment Institute for Occupational Diseases in China

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Biomedical and Environmental Sciences 2024年第1期37卷 122-126页

作者： HE La Gu LIANG yun lai YANG Lu Qi YUAN Hua Min Medical laboratory Department Hunan Prevention and Treatment Institute for Occupational DiseasesChangsha 410000HunanChina Laboratory Medicine Department Xiangya HospitalCentral South UniversityChangsha 410013HunanChina

Pneumoconiosis is a group of heterogeneous fibrotic lung diseases caused by inorganic mineral dust and includes coal workers’pneumoconiosis and *** involves diffuse or nodular interstitial pulmonary fibrosis caused by exposure to asbestos or silica *** is thought to have the highest number of silicosis cases,with 6,000 new cases reported annually^([1]).Currently,the clinical diagnosis and monitoring of silicosis relies mainly on a history of occupational exposure and radiological abnormalities^([2]).Therefore,determining further indicators is crucial to reflect the severity of silicosis.

关键词： diagnosis lung diseases

Highly reversible photomodulated hydrosoluble stiff-stilbene supramolecular luminophor induced by cucurbituril

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Chinese Chemical Letters 2024年第8期35卷 235-239页

作者： Guoxing Liu Yixin Li Changming Tian Yongmei Xiao Lijie Liu Zhanqi Cao Song Jiang Xin Zheng Caoyuan Niu yun-lai Ren Liangru Yang Xianfu Zheng Yong Chen College of Science Henan Agricultural UniversityZhengzhou 450002China College of Chemistry and Chemical Engineering Henan University of TechnologyZhengzhou 450001China College of Chemistry State Key Laboratory of Elemento-Organic ChemistryNankai UniversityTianjin 300071China

A photochromic molecular rotor based on stiff-stilbene(SSB-FMR)was handily prepared through coupled reaction,and further self-assembled with cucurbit[8]uril(CB[8])to form a 2:2 quaternary supramolecu-lar complex(SSB-FMR/CB[8]).Significantly,the intervention of CB[8]on SSB-FMR achieved dual functions that assembly-induced emission enhancement and assembly-induced improvement of photoisomerized performance(especially reversibility)of stiff-stilbene molecular *** supramolecular strategy further facilitated the assembly as a photoresponsive fluorescence switch with outstanding fatigue resis-tance,which was expediently applied in high-security-level QR code anti-counterfeiting and controllable lysosome targeted *** study unprecedentedly provides a supramolecular method for highly effi-ciently improving photoisomerized performance especially reversibility of molecular photoswitches based on stiff-stilbene,and is of vital significance for the construction of intelligent materials with excellent ca-pability.

关键词： Host-guest complexation Cucurbituril Fluorescence switch Stiff-stilbene Fluorescence enhancement

Occupational physical activity, all-cause, cardiovascular disease, and cancer mortality in 349,248 adults: Prospective and longitudinal analyses of the MJ Cohort

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Journal of Sport and Health Science 2024年第4期13卷 579-589页

作者： Emmanuel Stamatakis Matthew N.Ahmadi Tiana-Lee Elphick Bo-Huei Huang Susan Paudel Armando Teixeira-Pinto Li-Jung Chen Borja del Pozo Cruz yun-Ju lai Andreas Holtermann Po-Wen Ku Sydney School of Health Sciences Faculty of Medicine and HealthCharles Perkins CentreUniversity of SydneySydneyNSW 2006Australia Sydney School of Public Health Faculty of Medicine and HealthUniversity of SydneySydneyNSW 2006Australia Department of Exercise Health Science “National”Taiwan University of SportTaichung 40404China Department of Sports Science and Clinical Biomechanics University of Southern DenmarkOdense 5230Denmark Division of Endocrinology and Metabolism Department of Internal MedicinePuli Branch of Taichung Veterans General HospitalNantou 54552China National Research Centre for the Working Environment Copenhagen 2100Denmark Graduate Institute of Sports and Health Management “National”Chung Hsing UniversityTaichung 40227China

Background:Evidence on the health benefits of occupational physical activity(OPA)is *** examined the associations of baseline OPA and OPA changes with all-cause,cardiovascular disease(CVD),and cancer mortality and survival ***:This study included prospective and longitudinal data from the MJ Cohort,comprising adults over 18 years recruited in 1998-2016,349,248 adults(177,314 women)with baseline OPA,of whom 105,715(52,503 women)had 2 OPA measures at 6.3±4.2 years(mean±SD)*** were baseline OPA,OPA changes,and baseline leisure-time physical ***:Over a mean mortality follow-up of 16.2±5.5 years for men and 16.4±5.4 years for women,11,696 deaths(2033 of CVD and 4631 of cancer causes)in men and 8980 deaths(1475 of CVD and 3689 of cancer causes)in women *** moderately heavy/heavy baseline OPA was beneficially associated with all-cause mortality in men(multivariable-adjusted hazard ratio(HR)=0.93,95%confidence interval(95%CI):0.89-0.98 compared to light OPA)and women(HR=0.86,95%CI:0.79-0.93).Over a mean mortality follow-up of 12.5±4.6 years for men and 12.6±4.6 years for women,OPA decreases in men were detrimentally associated(HR=1.16,95%CI:1.01-1.33)with all-cause mortality,while OPA increases in women were beneficially(HR=0.83,95%CI:0.70-0.97)associated with the same *** or changes in OPA showed no associations with CVD or cancer ***:Higher baseline OPA was beneficially associated with all-cause mortality risk in both men and *** longitudinal OPA analyses partly confirmed the prospective findings,with some discordance between sex groups.

关键词： Cancer Cardiovascular disease Epidemiology Mortality

基于ANSYS的柴油机发电机支架仿真优化设计

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农机化研究 2024年第10期46卷 264-268页

作者：黄有华赖云江西机电职业技术学院机械工程学院南昌330013 江西五十铃发动机有限公司技术中心南昌330200

发电机支架是柴油机以及油电混合动力发动机的主要部件。针对JE4DDQ6B发动机在台架耐久试验中发生开裂、断裂的现象,对发电机支架系统进行了有限元模态分析计算、CAE仿真分析,并结合冲压的工艺特性,对结构进行了优化改进,全面解决了发... 详细信息

发电机支架是柴油机以及油电混合动力发动机的主要部件。针对JE4DDQ6B发动机在台架耐久试验中发生开裂、断裂的现象,对发电机支架系统进行了有限元模态分析计算、CAE仿真分析,并结合冲压的工艺特性,对结构进行了优化改进,全面解决了发电机支架发生开裂、断裂失效的问题。

关键词：发电机支架有限元模态分析优化设计

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论中小学心理健康教育的城乡协作

石家庄学院学报 2024年第4期26卷 145-149页

作者：赖运成龙岩学院师范教育学院福建龙岩364012

我国中小学心理健康教育城乡协作的主要经验,从形式上看,主要是“送教下乡”活动;从平台上看,主要依托区域教研组织、网络平台、区域心理健康辅导站、心理健康教育名师工作室等来进行协作;从内容上看,协作开展的心理健康教育活动主要涉... 详细信息

我国中小学心理健康教育城乡协作的主要经验,从形式上看,主要是“送教下乡”活动;从平台上看,主要依托区域教研组织、网络平台、区域心理健康辅导站、心理健康教育名师工作室等来进行协作;从内容上看,协作开展的心理健康教育活动主要涉及普适性的心理健康相关主题。同时,中小学心理健康教育城乡协作存在缺乏系统性、认知不到位、经费不足等问题,因此,应加强城乡中小学心理健康教育对口协作,强化城乡中小学心理健康教育师资建设,划拨中小学心理健康教育城乡协作专项经费,充分发挥网络在城乡协作方面的作用。

关键词：中小学心理健康教育城乡协作协同发展

结合几何控制的预应力混凝土连续钢构梁公路桥施工技术

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工程建设与设计 2024年第5期 236-238页

作者：唐运来四川路桥桥梁工程有限责任公司成都610000

针对预应力混凝土连续钢构梁公路桥建设中施工质量控制的问题,研究提出了一种结合几何控制的施工技术。使用有限元软件对桥梁进行三维建模,通过对施工参数的跟踪和几何控制,实现对施工质量的把控,解决了桥梁施工时缺少有效质量控制手段... 详细信息

针对预应力混凝土连续钢构梁公路桥建设中施工质量控制的问题,研究提出了一种结合几何控制的施工技术。使用有限元软件对桥梁进行三维建模,通过对施工参数的跟踪和几何控制,实现对施工质量的把控,解决了桥梁施工时缺少有效质量控制手段的问题,实现了对桥梁施工过程的全程控制。

关键词：钢构梁几何控制施工技术公路桥

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某大桥墩柱变形监测与结构性能分析研究

工程建设与设计 2024年第7期 122-124页

作者：唐运来四川路桥桥梁工程有限责任公司成都610000

针对桥墩微小变形难以发现,易造成较大危害的问题,论文以四川东部的一座预应力混凝土桥为例,分析其工程现状及监测方案优缺点,通过控制网点部署的方式对桥墩变形监测进行监测。监测结果表明,大桥的平面基准网络稳定,符合正常运用标准。... 详细信息

针对桥墩微小变形难以发现,易造成较大危害的问题,论文以四川东部的一座预应力混凝土桥为例,分析其工程现状及监测方案优缺点,通过控制网点部署的方式对桥墩变形监测进行监测。监测结果表明,大桥的平面基准网络稳定,符合正常运用标准。所有记录的位移值均在结构设计允许的安全边界之内,没有检测到任何不寻常的突变现象。

关键词：变形监测结构性能分析桥墩控制网点