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Mechanical response of a tunnel subjected to strike-slip faulting processes,based on a multi-scale modeling method

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Frontiers of Structural and Civil Engineering 2024年第8期18卷 1281-1295页

作者： Guoguo LIU Ping GENG Tianqiang wang Xiangyu GUO jiaxiang wang Ti DING Key Laboratory of Transportation Tunnel Engineering Ministry of EducationChengdu 610031China College of Civil Engineering Huaqiao UniversityXiamen 361021China China Railway Design Corporation Tianjin 300308China

The stick-slip action of strike-slip faults poses a significant threat to the safety and stability of underground *** this study,the north-east area of the Longmenshan fault,Sichuan,provides the geological background;the rheological characteristics of the crustal lithosphere and the nonlinear interactions between plates are described by Burger’s viscoelastic constitutive model and the friction constitutive model,respectively.A large-scale global numerical model for plate squeezing analysis is established,and the seemingly periodic stick-slip action of faults at different crust depths is *** a second model at a smaller scale,a local finite element model(sub-model),the time history of displacement at a ground level location on the Longmenshan fault plane in a stick-slip action is considered as the displacement *** integration of these models,creating a multi-scale modeling method,is used to evaluate the crack propagation and mechanical response of a tunnel subjected to strike-slip *** determinations of the recurrence interval of stick-slip action and the cracking characteristics of the tunnel are in substantial agreement with the previous field investigation and experimental results,validating the multi-scale modeling *** can be concluded that,regardless of stratum stiffness,initial cracks first occur at the inverted arch of the tunnel in the footwall,on the squeezed side under strike-slip *** smaller the stratum stiffness is,the smaller the included angle between the crack expansion and longitudinal direction of the tunnel,and the more extensive the crack expansion *** the tunnel in a high stiffness stratum,both shear and bending failures occur on the lining under strike-slip faulting,while for that in the low stiffness stratum,only bending failure occurs on the lining.

关键词： stick-slip action plate squeezing analysis multi-scale modeling method lining cracking mechanical response

MIDNet:Deblurring Network for Material Microstructure Images

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Computers, Materials & Continua 2024年第4期79卷 1187-1204页

作者： jiaxiang wang Zhengyi Li Peng Shi Hongying Yu Dongbai Sun National Center for Materials Service Safety University of Science and Technology BeijingBeijing100083China School of Materials Sun Yat-Sen UniversityShenzhen518107China School of Materials Science and Engineering Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)Sun Yat-Sen UniversityGuangzhou510006China

Scanning electron microscopy(SEM)is a crucial tool in the field of materials science,providing valuable insightsinto the microstructural characteristics of ***,SEM images often suffer from blurrinesscaused by improper hardware calibration or imaging automation errors,which present challenges in analyzingand interpretingmaterial ***,rectifying the blurring of these images assumes paramountsignificance to enable subsequent *** address this issue,we introduce a Material Images DeblurringNetwork(MIDNet)built upon the foundation of the Nonlinear Activation Free Network(NAFNet).MIDNetis meticulously tailored to address the blurring in images capturing the microstructure of *** keycontributions include enhancing the NAFNet architecture for better feature extraction and representation,integratinga novel soft attention mechanism to uncover important correlations between encoder and decoder,andintroducing newmulti-loss functions to improve training effectiveness and overallmodel *** conducta comprehensive set of experiments utilizing the material blurry dataset and compare them to several state-of-theartdeblurring *** experimental results demonstrate the applicability and effectiveness of MIDNet in thedomain of deblurring material microstructure images,with a PSNR(Peak Signal-to-Noise Ratio)reaching 35.26 dBand an SSIM(Structural Similarity)of *** dataset is available at:https://***/woshigui/MIDNet.

关键词： Image deblurring material microstructure attention mechanism deep learning

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基于数据挖掘技术的税务风险检测方法评述

Engineering 2024年第3期34卷 43-59页

作者： Qinghua Zheng Yiming Xu Huixiang Liu Bin Shi jiaxiang wang Bo Dong School of Computer Science and Technology Xi’an Jiaotong UniversityXi’an 710049China Shaanxi Provincial Key Laboratory of Big Data Knowledge Engineering Xi’an Jiaotong UniversityXi’an 710049China School of Distance Education Xi’an Jiaotong UniversityXi’an 710049China

Tax risk behavior causes serious loss of fiscal revenue,damages the country’s public infrastructure,and disturbs the market economic order of fair *** recent years,tax risk detection,driven by information technology such as data mining and artificial intelligence,has received extensive *** promote the high-quality development of tax risk detection methods,this paper provides the first comprehensive overview and summary of existing tax risk detection methods *** specifi-cally,it first discusses the causes and negative impacts of tax risk behaviors,along with the development of tax risk *** then focuses on data-mining-based tax risk detection methods utilized around the *** on the different principles employed by the algorithms,existing risk detection methods can be divided into two categories:relationship-based and non-relationship-based.A total of 14 risk detection methods are identified,and each method is thoroughly explored and ***,four major technical bottlenecks of current data-driven tax risk detection methods are analyzed and discussed,including the difficulty of integrating and using fiscal and tax fragmented knowledge,unexplainable risk detection results,the high cost of risk detection algorithms,and the reliance of existing algorithms on labeled *** investigating these issues,it is concluded that knowledge-guided and datadriven big data knowledge engineering will be the development trend in the field of tax risk in the future;that is,the gradual transition of tax risk detection from informatization to intelligence is the future development direction.

关键词： Tax risk detection Data mining Knowledge guide Informatization Intellectualization

Study on the Student Concentration in Class Based on Deep Multitasking Learning Framework

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IJLAI Transactions on Science and Engineering

IJLAI Transactions on Science and Engineering 2024年第3期2卷 47-57页

作者： Jiangjiang Li Lijuan Feng jiaxiang wang School of Electronic and Electrical Engineering Zhengzhou University of Science and Technology Zhengzhou 450064 China

In order to solve the problem of poor teaching quality caused by classroom teachers’inability to grasp students’dynamics in time,this paper designs a feedback system for classroom attention with the help of the research on expression recognition technology in deep *** the real-time analysis of expression,although the deeper deep learning network has more accurate recognition effect,there are drawbacks of too large model and too many parameters in the network training *** this paper,we propose a student concentration algorithm that uses the Convolutional Block attentional module(CBAM)and the Local Binary Pattern(LBP)to reduce the number of parameters in the model by replacing the convolution with the depthseparable convolution LBP preprocessing enhances the feature validity of the input feature map and improves the training speed and accuracy of the *** experimental results show that the algorithm has a good discriminating effect on expression recognition,and the model is small.

关键词： Student concentration CBAM Local Binary Pattern Deep learning

Pressure-Induced Distinct Self-Trapped Exciton Emission in Sb^(3+)-Doped Cs_(2)NaInCl_(6)Double Perovskite

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Chinese Physics Letters 2024年第6期41卷 18-43页

作者：冯友佳陈亚平王乐瑶王家祥常断华袁亦方武敏付瑞净张丽丽王庆林王凯郭海中王玲瑞 Key Laboratory of Materials Physics(Ministry of Education) School of PhysicsZhengzhou UniversityZhengzhou 450001China Shandong Key Laboratory of Optical Communication Science and Technology School of Physics Science and Information TechnologyLiaocheng UniversityLiaocheng 252059China College of Applied Physics and Materials Wuyi UniversityJiangmen 529020China

The Cs_(2)NaInCl_(6) double perovskite is one of the most promising lead-free perovskites due to its exceptional stability and straightforward ***,it faces challenges related to inefficient *** and high pressure are employed to tailor the optical properties of Cs_(2)NaInCl_(6).Herein,Sb^(3+)doped Cs_(2)NaInCl_(6)(Sb^(3+):Cs_(2)NaInCl_(6)) was synthesized and it exhibits blue emission with a photoluminescence quantum yield of up to 37.3%.Further,by employing pressure tuning,a blue stable emission under a very wide range from 2.7 GPa to 9.8 GPa is realized in Sb^(3+):Cs_(2)NaInCl_(6).Subsequently,the emission intensity of Sb^(3+):Cs_(2)NaInCl_(6) experiences a significant increase(3.3 times)at 19.0 *** is revealed that the pressure-induced distinct emissions can be attributed to the carrier self-trapping and detrapping between Cs_(2)NaInCl_(6) and Sb^(3+).Notably,the lattice compression in the cubic phase inevitably modifies the band gap of Sb^(3+):Cs_(2)NaInCl_(6).Our findings provide valuable insights into effects of the high pressure in further boosting unique emission characteristics but also offer promising opportunities for development of doped double perovskites with enhanced optical functionalities.

关键词： synthesis perovskite trapping

公路运输过程中固体火箭发动机药柱的累积损伤评估方法

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固体火箭技术 2024年第2期47卷 222-230页

作者：崔家源强洪夫王学仁王广王稼祥火箭军工程大学智剑实验室西安710025

对公路运输过程中固体火箭发动机药柱的累积损伤进行研究,开展了丁羟(HTPB)推进剂定应力往复拉伸试验,对其疲劳特性曲线进行了拟合和分析;通过处理装备运输试验的功率谱密度数据得到了公路运输过程中HTPB推进剂药柱振动加速度载荷谱,建... 详细信息

对公路运输过程中固体火箭发动机药柱的累积损伤进行研究,开展了丁羟(HTPB)推进剂定应力往复拉伸试验,对其疲劳特性曲线进行了拟合和分析;通过处理装备运输试验的功率谱密度数据得到了公路运输过程中HTPB推进剂药柱振动加速度载荷谱,建立了固体火箭发动机三维有限元计算模型,对药柱的应力响应进行仿真计算,通过雨流计数法统计得到循环载荷情况;基于Miner线性累积损伤模型,对公路运输过程中HTPB推进剂药柱进行累积损伤计算与评估。结果表明,在运输过程中,HTPB推进剂药柱的最大应力为0.021 MPa,最大应变为0.031,最大位移为19.320 mm,均处在前人工脱粘层部位;经4000 km公路运输后,HTPB推进剂药柱前人工脱粘层根部处损伤最大,损伤为0.080;药柱内孔处损伤最小,损伤为0.044。

关键词：固体火箭发动机公路运输 HTPB推进剂结构完整性累积损伤模型循环振动载荷

线粒体异常在多囊卵巢综合征患者卵泡发育异常中作用的研究进展

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中华妇产科杂志 2024年第6期59卷 486-491页

作者：韩子川田甜张楠王嘉祥杨蕊北京大学第三医院妇产科生殖医学中心国家妇产疾病临床医学研究中心辅助生殖教育部重点实验室北京市生殖内分泌与辅助生殖技术重点实验室北京100191

多囊卵巢综合征(PCOS)常见于育龄期妇女,是常见的生殖和内分泌疾病,存在激素、糖脂及炎症因子水平的紊乱。PCOS患者主要表现为卵母细胞成熟障碍,其卵泡细胞(包括卵母细胞、颗粒细胞和卵泡膜细胞等)中线粒体基因存在异常的遗传变异,同时... 详细信息

多囊卵巢综合征(PCOS)常见于育龄期妇女,是常见的生殖和内分泌疾病,存在激素、糖脂及炎症因子水平的紊乱。PCOS患者主要表现为卵母细胞成熟障碍,其卵泡细胞(包括卵母细胞、颗粒细胞和卵泡膜细胞等)中线粒体基因存在异常的遗传变异,同时线粒体数量、结构和功能也受到体内异常代谢水平的影响。上述变化会引发卵母细胞能量供应障碍、氧化应激以及颗粒细胞过度凋亡,与PCOS患者的卵母细胞质量和生育力下降有密切关系,本文对此进行综述,并探讨线粒体相关指标在辅助生殖治疗过程中用于卵母细胞质量评估的作用,可以通过分析卵母细胞内代谢辅酶的荧光影像、检测颗粒细胞线粒体DNA拷贝数、线粒体膜电位等指标,对PCOS患者的卵母细胞质量进行评估,从而预测辅助生殖治疗结局。

关键词：异常代谢育龄期妇女内分泌疾病线粒体膜电位卵母细胞质量颗粒细胞卵泡膜细胞氧化应激

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胃癌腹腔镜根治性全胃切除术的临床分析

中国医药指南 2024年第4期22卷 87-89页

作者：王加祥盐城市第一人民医院普通外科盐城224000

目的观察胃癌患者腹腔镜根治性全胃切除术的安全性及疗效情况。方法分析盐城市第一人民医院2020年8月至2022年8月实施的68例胃癌手术患者的临床资料。34例实施开腹手术患者纳入对照组,34例实施腹腔镜手术患者纳入观察组,对比两组术中... 详细信息

目的观察胃癌患者腹腔镜根治性全胃切除术的安全性及疗效情况。方法分析盐城市第一人民医院2020年8月至2022年8月实施的68例胃癌手术患者的临床资料。34例实施开腹手术患者纳入对照组,34例实施腹腔镜手术患者纳入观察组,对比两组术中及术后临床指标。结果相比较对照组,观察组切口长度较短、术中出血量较少、术后排气时间和住院时间更短、住院费用更高(P0.05)。结论胃癌根治性全胃切除术行腹腔镜相比开放手术切口小、出血量少,术后恢复快,住院时间少,手术根治术效果及并发症无明显差异,费用相对更高。

关键词：腹腔镜胃癌全胃切除术并发症根治效果微创

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腹腔镜直肠癌根治术不同手术入路临床分析

中国医药指南 2024年第9期22卷 87-89,93页

作者：王加祥盐城市第一人民医院盐城224000

目的对腹腔镜下直肠癌根治术采用不同手术入路的实际效果进行分析和探究。方法回顾分析2020年6月至2022年8月期间在盐城市第一人民医院进行了腹腔镜下直肠癌根治术治疗的84例患者治疗资料,使用双盲法的分组方式将患者分为两组,分别为对... 详细信息

目的对腹腔镜下直肠癌根治术采用不同手术入路的实际效果进行分析和探究。方法回顾分析2020年6月至2022年8月期间在盐城市第一人民医院进行了腹腔镜下直肠癌根治术治疗的84例患者治疗资料,使用双盲法的分组方式将患者分为两组,分别为对照组(n=42)以及观察组(n=42)。对照组采用常规的中间入路腹腔镜直肠癌根治术,而观察组的治疗方法选择头侧中间入路腹腔镜直肠癌根治术,比较两组患者手术情况以及术后恢复及随访情况。结果对照组和观察组患者的手术时间、手术中出血量、术后肛门首次排气时间以及住院时间对比,差异无统计学意义(P>0.05)。对照组患者手术中第253组淋巴结清扫数量相较于观察组较低,差异有统计学意义(P0.05)。两组患者术后随访期间无肿瘤复发、转移及因肿瘤相关因素导致的死亡。结论在腹腔镜直肠癌根治术时使用头侧中间入路和传统中间入路相比有同样的安全性和有效性。但更有助于第253组淋巴结的清扫。

关键词：腹腔镜直肠癌根治术手术入路手术效果随访情况