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稳定段曝气时间对高负荷接触稳定法碳捕获影响及微生物群落结构分析

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环境污染与防治 2024年第6期46卷 829-835页

作者：孙剑平王奥乾李绍峰于明远沈阳建筑大学市政与环境工程学院辽宁沈阳110168 深圳职业技术大学材料与环境工程学院广东深圳518055

为探究高负荷接触稳定法(HiCS)中稳定段曝气时间(ts)对废水碳捕获的影响,分析不同ts下HiCS系统的碳捕获率及污泥性质的差异,同时分析微生物群落结构差异。结果表明:当ts为1.0、2.0、3.0 h时,碳捕获率分别为43.0%、42.4%、39.2%,显著高... 详细信息

为探究高负荷接触稳定法(HiCS)中稳定段曝气时间(ts)对废水碳捕获的影响,分析不同ts下HiCS系统的碳捕获率及污泥性质的差异,同时分析微生物群落结构差异。结果表明:当ts为1.0、2.0、3.0 h时,碳捕获率分别为43.0%、42.4%、39.2%,显著高于ts为0.5、4.0 h的20.3%和25.3%;污泥粒径较小且分布集中、微观结构粗糙多孔,有利于污泥和有机物接触絮凝。微生物群落结构分析表明,与接种污泥相比,ts为0.5 h的HiCS污泥中变形菌门(Proteobacteria)和拟杆菌门(Bacteroidetes)的相对丰度由24.7%、25.8%上升至40.0%、30.8%。FAPROTAX功能预测结果显示,与碳循环代谢相关的微生物丰度最高,占比达到60%以上,其相对丰度受ts影响显著,在1.0~3.0 h时高于0.5、4.0 h时。

关键词：高负荷接触稳定法稳定段曝气时间碳捕获

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

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

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

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

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

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医疗行业生产效率提升:内在机制与中国经验

产业经济研究 2021年第2期 114-127页

作者：于明远山东财经大学国际经贸学院山东济南250014

当前中国医疗资源有限性与医疗需求无限扩增之间的矛盾日益突出,因此实现高效率的医疗供给对提升居民医疗福利水平意义重大。对医疗服务行业生产效率提升的内在机制进行了深入和系统的分析,提出了医疗行业生产效率提升机理的理论框架,... 详细信息

当前中国医疗资源有限性与医疗需求无限扩增之间的矛盾日益突出,因此实现高效率的医疗供给对提升居民医疗福利水平意义重大。对医疗服务行业生产效率提升的内在机制进行了深入和系统的分析,提出了医疗行业生产效率提升机理的理论框架,并对医疗制度、医疗技术、医疗机构管理水平、医疗市场有效竞争等因素影响医疗服务行业生产效率的路径进行了理论研究。以中国的经验数据为基础,从全国和地区两个层面对医疗行业生产效率的状况进行了实证分析,运用基于数据包络分析的曼奎斯特指数测算了中国医疗行业的生产效率,在此基础上运用计量模型和面板数据对中国医疗行业生产效率变动的成因进行了实证检验,发现了中国医疗行业生产效率变化的三个基本特征。研究结论为进一步探究中国医疗行业生产效率奠定了基础,为政府部门制定相关政策提供了理论支持。

关键词：医疗行业生产效率内在机制基本状况地区差异政策意义

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基于差异化公共性的公路收费问题解析

公路交通科技 2012年第4期29卷 149-152,158页

作者：徐瑛虞明远交通运输部公路科学研究院北京100088

目前对收费公路问题的讨论很多,但缺乏从经济学角度的系统认识,从公路的经济属性出发,解析高速公路和一般公路的经济属性的异同点,提出作为公共产品的公路,普通公路和高速公路的公共产品化程度是不同的,普通公路的公共产品化程度更显著... 详细信息

目前对收费公路问题的讨论很多,但缺乏从经济学角度的系统认识,从公路的经济属性出发,解析高速公路和一般公路的经济属性的异同点,提出作为公共产品的公路,普通公路和高速公路的公共产品化程度是不同的,普通公路的公共产品化程度更显著,而具有一定垄断特性的高速公路的公共产品程度较低。在考察国外发达国家针对收费问题的具体举措上,提出普通公路不应该收取通行费,高速公路可以收取通行费作为对"级差效益"的补偿。最后,在对我国高速公路收费权益转让制度认可的基础上,提出我国收费公路权益转让更重要的是要形成收益权转让的"市场",提出我国公路收费管理和收费制度改进的方向。

关键词：运输经济差异化收费制度公共产品经济属性级差效益收费公路权益

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基层政府绩效评价机制优化探索

生态经济 2010年第2期26卷 75-77页

作者：余明远天水师范学院经济与社会管理学院甘肃天水741001

优化基层政府绩效评价机制包括:评价程序合法化、评价主体多元化、评价内容公开化、评价机构专门化、评价标准科学化、评价形式系统化、评价手段现代化、评价模式国际化、评价结果权威化。

关键词：基层政府评价机制优化