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基于YOLOv8改进的轴承表面缺陷检测方法

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福建理工大学学报 2024年第3期22卷 280-285页

作者：于明源周景亮曾绍锋易思敏福建理工大学机械与汽车工程学院福建福州350118

针对深度学习模型在轴承表面缺陷检测过程中漏检率高、模型复杂度高的问题,提出了一种基于YOLOv8的缺陷检测改进算法。在主干网络中引入GSConv轻量化卷积模块,用GSConv模块代替普通卷积,在不影响模型精度的情况下,减少模型的计算量;引入... 详细信息

针对深度学习模型在轴承表面缺陷检测过程中漏检率高、模型复杂度高的问题,提出了一种基于YOLOv8的缺陷检测改进算法。在主干网络中引入GSConv轻量化卷积模块,用GSConv模块代替普通卷积,在不影响模型精度的情况下,减少模型的计算量;引入CBAM卷积注意力模块,通过改进网络特征提取技术,提高了检测的准确性。实验结果表明,改进的模型在自建轴承表面缺陷检测数据集上的准确率为92.6%,较原模型准确率88.8%提高了3.8%;在提升准确率的同时,计算量也从8.2 GFLOPs减少到8.0 GFLOPs,证明了改进后的模型对轴承缺陷检测的有效性。

关键词：轴承表面缺陷检测 YOLOv8 注意力机制深度学习缺陷检测

Enhanced charge separation by continuous homojunction with spatially separated redox sites for hydrogen evolution

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Nano Research 2023年第10期16卷 12323-12330页

作者： mingyuan yu Tongyu Wang Chengxi Huang Fang Wu Xuan Liu Hailing Huo Hanwen Jian Zikun Liang Jingjing Ma Erjun Kan Ang Li MIIT Key Laboratory of Semiconductor Microstructure and Quantum Sensing School of ScienceNanjing University of Science and TechnologyNanjing 210094China College of Information Science and Technology Nanjing Forestry UniversityNanjing 210037China State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering Ningxia UniversityYinchuan 750021China

Photocatalytic hydrogen generation represents a promising strategy for the establishment of a sustainable and environmentally friendly energy ***,the current solar-to-hydrogen conversion efficiency is not yet sufficient for practical hydrogen production,highlighting the need for further research and ***,we report the synthesis of a Sn-doped TiO_(2)continuous homojunction hollow sphere,achieved through controlled calcination *** incorporation of a gradient doping profile has been demonstrated to generate a gradient in the band edge energy,facilitating carrier orientation ***,the hollow sphere’s outer and inner sides provide spatially separated reaction sites allowing for the separate acceptance of holes and electrons,which enables the rapid utilization of carriers after *** a result,the hollow sphere TiO_(2)with gradient Sn doping exhibits a significantly increased hydrogen production rate of 20.1 mmol·g^(−1)·h^(−1).This study offers a compelling and effective approach to the designing and fabricating highly efficient nanostructured photocatalysts for solar energy conversion applications.

关键词： continuous homojunction spatially separated reaction sites charge separation hydrogen evolution

A Combination Prediction Model for Short Term Travel Demand of Urban Taxi

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Computers, Materials & Continua 2024年第6期79卷 3877-3896页

作者： mingyuan Li yuanli Gu Qingqiao Geng Hongru yu School of Traffic and Transportation Beijing Jiaotong UniversityBeijing100044China Transport Planning and Research Institute Ministry of TransportBeijing100028China

This study proposes a prediction model considering external weather and holiday factors to address the issue of accurately predicting urban taxi travel demand caused by complex data and numerous influencing *** model integrates the Complete Ensemble Empirical Mode Decomposition with Adaptive Noise(CEEMDAN)and Convolutional Long Short Term Memory Neural Network(ConvLSTM)to predict short-term taxi travel *** CEEMDAN decomposition method effectively decomposes time series data into a set of modal components,capturing sequence characteristics at different time scales and *** on the sample entropy value of components,secondary processing of more complex sequence components after decomposition is employed to reduce the cumulative prediction error of component sequences and improve prediction *** this basis,considering the correlation between the spatiotemporal trends of short-term taxi traffic,a ConvLSTM neural network model with Long Short Term Memory(LSTM)time series processing ability and Convolutional Neural Networks(CNN)spatial feature processing ability is constructed to predict the travel demand for urban *** combined prediction model is tested on a taxi travel demand dataset in a certain area of *** results show that the CEEMDAN-ConvLSTM prediction model outperforms the LSTM,Autoregressive Integrated Moving Average model(ARIMA),CNN,and ConvLSTM benchmark models in terms of Symmetric Mean Absolute Percentage Error(SMAPE),Root Mean Square Error(RMSE),Mean Absolute Error(MAE),and R2 ***,the SMAPE metric exhibits a remarkable decline of 21.03%with the utilization of our proposed *** results confirm that our study provides a highly accurate and valid model for taxi travel demand forecasting.

关键词： Urban transport taxi travel demand prediction CEEMDAN-ConvLSTM modal components

Mitochondria-specific near-infrared photoactivation of peroxynitrite upconversion luminescent nanogenerator for precision cancer gas therapy

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Acta Pharmaceutica Sinica B 2024年第1期14卷 378-391页

作者： Hui yu Aliya Tiemuer Xufeng Yao mingyuan Zuo Hai-Yan Wang Yi Liu Xiaoyuan Chen Department of Biomedical Engineering School of EngineeringChina Pharmaceutical UniversityNanjing 211198China School of Mechanical Engineering Southeast UniversityNanjing 211189China Departments of Diagnostic Radiology SurgeryChemical and Biomolecular Engineeringand Biomedical EngineeringYong Loo Lin School of Medicine and College of Design and EngineeringNational University of SingaporeSingapore 119074Singapore Clinical Imaging Research Centre Centre for Translational MedicineYong Loo Lin School of MedicineNational University of SingaporeSingapore 117599Singapore Nanomedicine Translational Research Program Yong Loo Lin School of MedicineNational University of SingaporeSingapore 117597Singapore Institute of Molecular and Cell Biology Agency for ScienceTechnologyand Research(A*STAR)ProteosSingapore 138673Singapore

Gas therapy is emerging as a highly promising therapeutic strategy for cancer ***,there are limitations,including the lack of targeted subcellular organelle accuracy and spatiotemporal release precision,associated with gas *** this study,we developed a series of photoactivatable nitric oxide(NO)donors NRh-R-NO(R=Me,Et,Bn,iPr,and Ph)based on an N-nitrosated upconversion luminescent rhodamine *** the irradiation of 808 nm light,only NRh-Ph-NO could effectively release NO and NRh-Ph with a significant turn-on frequency upconversion luminescence(FUCL)signal at 740 nm,ascribed to lower N-N bond dissociation *** also investigated the involved multistage near-infrared-controlled cascade release of gas therapy,including the NO released from NRh-Ph-NO along with one NRh-Ph molecule generation,the superoxide anion O_(2)^(⋅−)produced by the photodynamic therapy(PDT)effect of NRh-Ph,and highly toxic peroxynitrite anion(ONOO‒)generated from the co-existence of NO and O_(2)^(⋅−).After mild nano-modification,the nanogenerator(NRh-Ph-NO NPs)empowered with superior biocompatibility could target *** an 808 nm laser irradiation,NRh-Ph-NO NPs could induce NO/ROS to generate RNS,causing a decrease in the mitochondrial membrane potential and initiating apoptosis by caspase-3 activation,which further induced tumor immunogenic cell death(ICD).In vivo therapeutic results of NRh-Ph-NO NPs showed augmented RNS-potentiated gas therapy,demonstrating excellent biocompatibility and effective tumor inhibition guided by real-time FUCL ***,this versatile strategy defines the targeted RNS-mediated cancer therapy.

关键词： Near infrared Photo-triggered Mitochondrion Upconversion luminescent bioimaging Peroxynitrite Nanogenerator Gas therapy In vivo

On the design of high-speed energy-efficient successive-approximation logic for asynchronous SAR ADCs

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Journal of Semiconductors 2017年第8期38卷 87-92页

作者： Jiaqi Yang Ting Li mingyuan yu Shuangshuang Zhang Fujiang Lin Lin He Institute of MESIC University of Science and Technology of China Science and Technology on Analog Integrated Circuit Laboratory

This paper analyzes the power consumption and delay mechanisms of the successive-approximation （SA） logic of a typical asynchronous SAR ADC, and provides strategies to reduce both of them. Following these strategies, a unique direct-pass SA logic is proposed based on a full-swing once-triggered DFF and a self-locking tri-state gate. The unnecessary internal switching power of a typical TSPC DFF, which is commonly used in the SA logic, is avoided. The delay of the ready detector as well as the sequencer is removed from the critical path. A prototype SAR ADC based on the proposed SA logic is fabricated in 130 nm CMOS. It achieves a peak SNDR of 56.3 dB at 1.2 V supply and 65 MS/s sampling rate, and has a total power consumption of 555 μW, while the digital part consumes only 203μW.

关键词： analog-to-digital conversion successive approximation low-power high-speed internal switchingactivities

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多功能热电织物用于可穿戴无线传感系统

Engineering 2024年第4期35卷 158-167页

作者： Xinyang He Jiaxin Cai mingyuan Liu Xuepeng Ni Wendi Liu Hanyu Guo Jianyong yu Liming Wang Xiaohong Qin Key Laboratory of Textile Science&Technology Ministry of EducationCollege of TextilesDonghua UniversityShanghai 201620China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China Innovation Center for Textile Science and Technology Donghua UniversityShanghai 201620China

Flexible thermoelectric materials play an important role in smart wearables,such as wearable power generation,self-powered sensing,and personal thermal ***,with the rapid development of Internet of Things(IoT)and artificial intelligence(AI),higher standards for comfort,multifunctionality,and sustainable operation of wearable electronics have been proposed,and it remains challenging to meet all the requirements of currently reported thermoelectric ***,we present a multifunctional,wearable,and wireless sensing system based on a thermoelectric knitted fabric with over 600 mm·s^(-1)air permeability and a stretchability of 120%.The device coupled with a wireless transmission system realizes self-powered monitoring of human respiration through an mobile phone application(APP).Furthermore,an integrated thermoelectric system was designed to combine photothermal conversion and passive radiative cooling,enabling the characteristics of being powered by solar-driven in-plane temperature differences and monitoring outdoor sunlight intensity through the ***,we decoupled the complex signals of resistance and thermal voltage during deformation under solar irradiation based on the anisotropy of the knitted fabrics to enable the device to monitor and optimize the outdoor physical activity of the athlete via the *** novel thermoelectric fabricbased wearable and wireless sensing platform has promising applications in next-generation smart textiles.

关键词： Thermoelectric fabrics Wearable device Wireless Multifunctional sensing system Outdoor wearable signal monitoring

Waste Cotton-Derived Fiber-Based Thermoelectric Aerogel for Wearable and Self-Powered Temperature-Compression Strain Dual-Parameter Sensing

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Engineering 2024年第8期39卷 235-243页

作者： Xinyang He mingyuan Liu Jiaxin Cai Zhen Li Zhilin Teng yunna Hao Yifan Cui Jianyong yu Liming Wang Xiaohong Qin Key Laboratory of Textile Science&Technology Ministry of EducationCollege of TextilesDonghua UniversityShanghai 201620China Key Laboratory of Science and Technology of Eco-Textiles Ministry of EducationJiangnan UniversityWuxi 214122China Innovation Center for Textile Science and Technology Donghua UniversityShanghai 201620China

The rapid development of the global economy and population growth are accompanied by the production of numerous waste *** leads to a waste of limited resources and serious environmental pollution problems caused by improper *** rational recycling of wasted textiles and their transformation into high-value-added emerging products,such as smart wearable devices,is ***,we propose a novel roadmap for turning waste cotton fabrics into three-dimensional elastic fiber-based thermoelectric aerogels by a one-step lyophilization process with decoupled self-powered temperature-compression strain dual-parameter sensing *** thermoelectric aerogel exhibits a fast compression response time of 0.2 s,a relatively high Seebeck coefficient of 43μV·K^(-1),and an ultralow thermal conductivity of less than 0.04 W·m^(-1)·K^(-1).The cross-linking of trimethoxy(methyl)silane(MTMS)and cellulose endowed the aerogel with excellent elasticity,allowing it to be used as a compressive strain sensor for guessing games and facial expression *** addition,based on the thermoelectric effect,the aerogel can perform temperature detection and differentiation in self-powered mode with the output thermal voltage as the stimulus ***,the wearable system,prepared by connecting the aerogel-prepared array device with a wireless transmission module,allows for temperature alerts in a mobile phone application without signal interference due to the compressive strains generated during ***,our strategy is significant for reducing global environmental pollution and provides a revelatory path for transforming waste textiles into high-value-added smart wearable devices.

关键词： Waste textiles High value-added recycling Thermoelectrics Elasticity Decoupled sensing

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先天性乳糜胸的临床特点:11例分析

中华围产医学杂志 2024年第2期27卷 89-95页

作者：陈瑜温弘吴明远浙江大学医学院附属妇产科医院新生儿科杭州310006 绍兴第二医院新生儿科绍兴312000 浙江大学医学院附属妇产科医院产科杭州310006

目的总结先天性乳糜胸的临床特点和预后,为合理诊疗提供依据。方法回顾性分析2020年1月至2022年12月浙江大学医学院附属妇产科医院新生儿科救治的11例先天性乳糜胸患儿的临床资料,总结宫内干预、临床表现、辅助检查、治疗方法、转归和... 详细信息

目的总结先天性乳糜胸的临床特点和预后,为合理诊疗提供依据。方法回顾性分析2020年1月至2022年12月浙江大学医学院附属妇产科医院新生儿科救治的11例先天性乳糜胸患儿的临床资料,总结宫内干预、临床表现、辅助检查、治疗方法、转归和随访。采用描述性统计分析。结果11例患儿均为剖宫产娩出,出生胎龄(35.7±2.2)周(32+1~39周+0),男女比例4∶7,合并胎儿水肿4例。9例行宫内干预(胸腔穿刺术6例、胸腔-羊膜腔分流术1例、胸腔穿刺术+胸腔-羊膜腔分流术2例)。6例生后有轻度窒息。生后24 h内均出现呼吸窘迫;胸部X射线片及超声均提示胸腔积液。经胸腔引流、呼吸支持、序贯式营养治疗、奥曲肽等治疗后,9例治愈出院,2例因肺萎陷(均合并胎儿水肿)放弃治疗后死亡。9例出院患儿随访至生后3~22个月,均未复发,生长发育均未见异常。结论先天性乳糜胸患儿易发生产时窒息并出现呼吸窘迫。经宫内干预和生后综合治疗,存活率高且预后良好。

关键词：乳糜胸胸腔穿刺术引流术羊膜营养支持

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陈设艺术品的应用对空间氛围的影响

科教导刊 2022年第2期 44-46页

作者：郁茗媛江苏联合职业技术学院徐州经贸分院江苏徐州221004

当前,随着人们生活水平和审美追求的提升,对室内设计提出了新要求,除了要新颖独特外,还要有空间氛围感、故事性。陈设艺术品凭借其形态各异、色彩纷呈、材质多样等优势受到了室内设计师的青睐,将其合理应用在室内设计中,不仅可以打造时... 详细信息

当前,随着人们生活水平和审美追求的提升,对室内设计提出了新要求,除了要新颖独特外,还要有空间氛围感、故事性。陈设艺术品凭借其形态各异、色彩纷呈、材质多样等优势受到了室内设计师的青睐,将其合理应用在室内设计中,不仅可以打造时尚宜居的空间环境,营造良好空间氛围,还能满足人们的多样化需求。基于此,本文从陈设艺术品概述、当前陈设品存在的问题、材质在陈设品中对人的影响及陈设艺术品对提升空间氛围的创新路径四个方面,探究陈设艺术品的应用对空间氛围的影响。

关键词：陈设艺术品空间氛围影响

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