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Lead-free perovskites-based photonic synaptic devices with zero electric energy consumption

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Science China(Information Sciences) 2024年第6期67卷 433-441页

作者： dandan HAO Di YANG Haixia LIANG Jia HUANG Fukai SHAN College of Electronics and Information Qingdao University Key Laboratory of Biofuels Qingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of Sciences School of Materials Science and Engineering Tongji University National Key Laboratory of Autonomous Intelligent Unmanned Systems Tongji University

The von Neumann bottleneck is a critical limitation in synaptic devices. Therefore, artificial synaptic devices resembling biological neuromorphic synapses have been developed to overcome the von Neumann bottleneck. However, synaptic devices require voltages, which results in considerable energy consumption. Here, photonic synaptic devices with the vertical structure of indium tin oxide（ITO）/SnO2/Al2O3/CsBi3I10/Au are fabricated, which can work in the self-powered mode owing to the photovoltaic effect endowed by a vertical multilayer structure. Several fundamental synaptic functions, such as excitatory postsynaptic current, paired-pulse facilitation, short-term plasticity（STP）, long-term plasticity（LTP）, pulse-frequency-dependent plasticity, transition of STP to LTP, and the learning experience are emulated. Moreover, Morse-coded external light information is decoded by self-powered photonic synaptic devices. The results indicate that self-powered photonic synaptic devices based on lead-free perovskites exhibit great potential for efficient neuromorphic computing and optical wireless communication.

关键词： photonic synaptic devices lead-free perovskites zero energy consumption synaptic plasticity Morse code

Scraping therapy for knee osteoarthritis: a systematic review and Meta-analysis

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Journal of Traditional Chinese Medicine 2024年第4期44卷 633-641页

作者： CHEN dandan JIN Qianhong SHEN Yuanjuan WANG Qing DAI Zhengxiang School of Nursing Guangxi University of Chinese MedicineNanning 530200China School of Nursing Nanjing University of Chinese MedicineNanjing 210023China General Surgery Department Jiangsu Province Hospital of Chinese MedicineNanjing 210004China Hospital Infection Control Office Jiangsu Province Hospital of Chinese MedicineNanjing 210004China

OBJECTIVE:To systematically evaluate the efficacy of scraping therapy on knee osteoarthritis(KOA).METHODS:A computerized search was conducted in several databases,including PubMed,Web of Science,Cochrane Library,China National Knowledge Infrastructure Database,China Science and Technology Journal Database,Wanfang,and Chinese BioMedical Literature Database,from the establishment date of these databases to April 9,*** controlled trials(RCTs)on scraping therapy for KOA were collected in accordance with the“Participants-Intervention-Control-Outcome-Study design”*** methodological evaluation of the included studies was carried out using RoB 2.0,and Meta-analysis was conducted using *** Grades of Recommendations Assessment,Development and Evaluation(GRADE System)was applied to grade the quality of ***:A total of 12 RCTs with 997 subjects were included in the *** indicated that compared with the control group,the scraping therapy treatment group exhibited increased Lysholm scores[mean difference(MD)=4.96,95%confidence intervals(CI)(3.18,6.74),P<0.00001]and Hospital for Special Surgery scores[MD=8.35,95%CI(3.92,12.78),P=0.0002]and decreased visual analog scale scores[MD=-2.11,95%CI(-3.79,-0.44),P=0.01]and Western Ontario and McM aster University Osteoarthritis Index scores[MD=-6.77,95%CI(-8.99,-4.56),P<0.00001)].The quality of evidence obtained in this Meta-analysis was low according to the GRADE ***:The available evidence suggests that scraping therapy may have certain clinical efficacy in the treatment of ***,further high-quality RCTs are needed to confirm the findings.

关键词： osteoarthritis,knee scraping Meta-analysis systematicreview

Development and optimization of object detection technology in pavement engineering: A literature review

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Journal of Road Engineering 2024年第2期4卷 163-188页

作者： Hui Yao Yaning Fan Yanhao Liu dandan Cao Ning Chen Tiancheng Luo Jingyu Yang Xueyi Hu Jie Ji Zhanping you Beijing Key Laboratory of Transportation Engineering Faculty of ArchitectureCivil and Transportation EngineeringBeijing University of TechnologyBeijing 100124China School of Civil and Transportation Engineering Beijing University of Civil Engineering and ArchitectureBeijing 100044China Department of Civil and Environmental Engineering Michigan Technological UniversityHoughtonMI 49931USA

Due to the rapid advancement of the transportation industry and the continual increase in pavement infrastructure,it is difficult to keep up with the huge road maintenance task by relying only on the traditional manual detection *** pavement detection technology with deep learning techniques is available for the research and industry areas by the gradual development of computer vision *** to the different characteristics of pavement distress and the uncertainty of the external environment,this kind of object detection technology for distress classification and location still faces great *** paper discusses the development of object detection technology and analyzes classical convolutional neural network(CNN)*** addition to the one-stage and two-stage object detection frameworks,object detection without anchor frames is introduced,which is divided according to whether the anchor box is used or *** paper also introduces attention mechanisms based on convolutional neural networks and emphasizes the performance of these mechanisms to further enhance the accuracy of object *** network architecture is introduced for mobile and industrial *** stereo cameras and sensors are rapidly developed,a detailed summary of three-dimensional object detection algorithms is also *** reviewing the history of the development of object detection,the scope of this review is not only limited to the area of pavement crack detection but also guidance for researchers in related fields is shared.

关键词： Pavement engineering Object detection Lightweight network Attention mechanism Convolutional neural network

A Vague Set Based OWA Method for Talent Evaluation

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Journal of Systems Science and Information 2024年第4期12卷 543-553页

作者： Peilong WANG dandan LI Wei XU School of Management University of Chinese Academy of SciencesBeijing 100190China School of Information Renmin University of ChinaBeijing 100872China School of Smart Governance Renmin University of ChinaSuzhou 215123China

In recent years,decision-making under uncertainty has attracted substantial attention in both academia and industry,with a growing number of organizations prioritizing decision support for talent *** set theory has been recognized as a powerful tool to address the ambiguity of problem parameters and manage *** paper introduces a novel talent evaluation method that harnesses the potential of vague *** construct a vague set Ordered Weighted Averaging(OWA)operator for offering a robust solution to intricate decision-making problems,especially in talent *** application of the OWA operator augments the decision-making process by providing a mechanism to handle the aggregation of information in a more flexible and comprehensive *** results show the effectiveness of the proposed method,presenting an alternative for decision-makers,aiding them in selecting their preferred choices amidst uncertainty.

关键词： uncertain vague set talent evaluation OWA operator

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我国网络舆情热点话题发现研究综述

现代情报 2017年第3期37卷 165-171页

作者：游丹丹陈福集福州大学经济与管理学院福建福州350108

随着互联网的快速发展,网络舆情对社会的影响不容忽视。若能够及时从海量数据中发现热点话题,追踪热点话题演变以及预测话题的倾向,对于帮助相关部门及时有效地对其引导和控制具有较大意义。本文通过对我国网络舆情热点话题发现的相关... 详细信息

随着互联网的快速发展,网络舆情对社会的影响不容忽视。若能够及时从海量数据中发现热点话题,追踪热点话题演变以及预测话题的倾向,对于帮助相关部门及时有效地对其引导和控制具有较大意义。本文通过对我国网络舆情热点话题发现的相关文献进行收集、整理及分析,归纳其中的主要研究思想和方法,同时发现存在的不足,并提出进一步的展望,以期对后来研究者提供参考。

关键词：网络舆情热点话题发现发现模型综述

基于改进粒子群和BP神经网络的网络舆情预测研究

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情报杂志 2016年第8期35卷 156-161页

作者：游丹丹陈福集福州大学经济与管理学院福州350108

[目的/意义]网络舆情是一种复杂、多变的系统,通过数据分析并建立网络舆情预测模型来预测其发展趋势具有一定的研究意义。[方法/过程]选择热点话题的百度指数作为网络舆情趋势预测的时间序列指标,采用粒子群算法和BP神经网络算法构建了... 详细信息

[目的/意义]网络舆情是一种复杂、多变的系统,通过数据分析并建立网络舆情预测模型来预测其发展趋势具有一定的研究意义。[方法/过程]选择热点话题的百度指数作为网络舆情趋势预测的时间序列指标,采用粒子群算法和BP神经网络算法构建了基于改进粒子群算法和BP神经网络的网络舆情预测模型,并结合天津港爆炸事件案例进行验证与分析。[结果/结论]实验结果表明该模型在预测的性能上具有一定的优越性,为网络舆情预测提供了一有效模型。

关键词：网络舆情网络舆情预测粒子群算法 BP神经网络

Decoding the Molecular Mechanisms of BRAFV600E-Induced Nevi Formation

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Biomedical and Environmental Sciences 2024年第7期37卷 774-784页

作者： Weizheng Liang Yuxuan Liu dandan Xu Wenjie Jiang Rensen Ran Central Laboratory The First Affiliated Hospital of Hebei North UniversityZhangjiakou 075000HebeiChina Institute of Molecular Immunology School of Laboratory Medicine and BiotechnologySouthern Medical UniversityGuangzhou 510515GuangdongChina Department of Artificial Intelligence and Data Science Hebei University of TechnologyTianjin 300401China Department of Chemical Biology School of Life SciencesSouthern University of Science and TechnologyShenzhen 518055GuangdongChina

Melanocytes derived from neural crest cells harbor the BRAFV600E mutation,which is the predominant driver of nevus formation in *** mutation leads to malignant cell proliferation and subsequent cell cycle arrest,culminating in oncogene-induced senescence and nevus ***,emerging evidence has highlighted the heterogeneity of cellular senescence markers in BRAFV600E-induced senescent ***,the capacity of melanocytes within nevi to regain their proliferative ability raises questions about the molecular mechanisms by which BRAFV600E,via the mitogen-activated protein kinase signaling pathway,triggers nevus *** study provides an overview and discussion of the molecular mechanisms underpinning BRAFV600E-induced melanocyte nevus formation and the relevant animal models employed for their *** also highlights the significance of elucidating dynamic changes in cytoplasmic and nuclear substrates that interact with phosphorylated extracellular signal-regulated protein kinases 1 and 2 and underscores the value of using targeted BRAFV600E animal models created through gene editing technologies.

关键词： BRAFV600E Melanocytes Nevi Oncogene-induced senescence Animal models

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基于系统动力学的网络舆情事件传播研究

情报杂志 2015年第9期34卷 118-122页

作者：陈福集游丹丹福州大学经济与管理学院福州350108

结合SIR模型,建立系统动力学仿真模型对网络舆情事件传播过程进行系统分析,绘制因果回路图,建立存量流量图,利用Vensim PLE进行模拟仿真,探索网络舆情的传播规律、影响因素及保持传播系统稳定的平衡点。结果表明,接触速率、政府管控引... 详细信息

结合SIR模型,建立系统动力学仿真模型对网络舆情事件传播过程进行系统分析,绘制因果回路图,建立存量流量图,利用Vensim PLE进行模拟仿真,探索网络舆情的传播规律、影响因素及保持传播系统稳定的平衡点。结果表明,接触速率、政府管控引导速率、易感疑惑人群数量等因素对网络舆情事件传播起到至关重要的作用,进而在此结论上为相关政府部门提出相应的对策建议。

关键词：网络舆情 SIR模型系统动力学

Comparative study on the hydrogen storage performance of as-milled MgRENi rapid quenched alloy catalyzed by metal sulfides

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Journal of Magnesium and Alloys 2024年第5期12卷 2010-2023页

作者： Xiaoping Dong Zhaoqing Zhang Liying Yang Shenghai Xin dandan Su Zhiyuan Li Department of Mechanical Design and Manufacture and Automation Hebei UniversityBaoding 071000PR China Baoding New Energy Vehicle Power Engineering Technology Research Center Hebei UniversityBaoding 071002PR China Hebei Technology Innovation Center for Lightweight of New Energy Vehicle Power System(Preparation) Hebei UniversityBaoding 071002PR China

The composites of Mg_(20)Pr_(1)Sm_(3)Y_(1)Ni_(10)as-quenched alloy and 3 wt.%M(M=CoS,CoS_(2),MoS_(2))catalyst were prepared by high-speed vibration ball *** effects of metal sulfides on the hydrogenation and dehydrogenation dynamics of alloys were *** results show that the as-milled composites contain a large number of amorphous embedded by a small amount of nanocrystals,and there are many point *** ball milling,the crystal grain size in the composites containing CoS is relatively larger,followed by CoS_(2)and MoS_(2)*** hydrogenation,the amorphous phase is crystallized to form Mg_(2)NiH_(4),YH_(3),Pr_(8)H_(18.96),Sm_(3)H_7,Mg,Co or Mo phases,however,Mg_(2)Ni,YH_(2),PrH_(2)and Ni_(3)Y phases appeared after *** maximum hydrogenation capacity of the composites containing CoS,CoS_(2)and MoS_(2)are 3.939,4.265 and 4.507 wt.%,*** hydrogenation saturation ratio of composite containing MoS_(2)is higher than that of the composites containing CoS and CoS_(2).The dehydrogenation activation energy of the composites containing CoS,CoS_(2)and MoS_(2)is 107.76,68.43 and 63.28 ***^(-1).H_(2).On the improvement of hydrogen storage performance of Mg_(20)Pr_(1)Sm_(3)Y_(1)Ni_(10)alloy,the catalytic effect of MoS_(2)sulfide is better than that of CoS_(2)sulfide,and which is better than CoS sulfide.

关键词： Mg_(20)Pr_(1)Sm_(3)Y_(1)Ni_(10)as-quenched alloy CoS CoS_(2)and MoS_(2)sulfide Milling Activation energy Hydrogen storage dynamics