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主动寻找或偶然接触:社交媒体使用对青少年线下和线上政治参与的影响

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现代传播（中国传媒大学学报） 2024年第1期46卷 74-83页

作者：张明新万巧芸华中科技大学新闻与信息传播学院

在数智化背景下,社交媒体的运作逻辑带来公众新闻接触方式的分化,主动寻找新闻和偶然接触新闻成为两种日常化的媒体使用形态。基于2020—2022年间实施的全国性问卷调查及后续深度访谈,考察青少年的社交媒体主动和偶然新闻接触对政治参... 详细信息

在数智化背景下,社交媒体的运作逻辑带来公众新闻接触方式的分化,主动寻找新闻和偶然接触新闻成为两种日常化的媒体使用形态。基于2020—2022年间实施的全国性问卷调查及后续深度访谈,考察青少年的社交媒体主动和偶然新闻接触对政治参与的影响。结论表明,两种新闻接触方式都显著促进青少年的线下和线上政治参与,但偶然新闻接触的影响更大。社交媒体新闻接触还通过提升政治知识水平、激发政治讨论及二者之间的链式连接,促进青少年群体的政治参与。

关键词：政治参与社交媒体新闻接触政治知识政治讨论

Dendritic Learning-Incorporated Vision Transformer for Image Recognition

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IEEE/CAA Journal of Automatica Sinica 2024年第2期11卷 539-541页

作者： Zhiming zhang Zhenyu Lei Masaaki Omura Hideyuki Hasegawa Shangce Gao Faculty of Engineering University of ToyamaToyama-shi 930-8555Japan IEEE

Dear Editor,This letter proposes to integrate dendritic learnable network architecture with Vision Transformer to improve the accuracy of image *** this study,based on the theory of dendritic neurons in neuroscience,we design a network that is more practical for engineering to classify visual *** on this,we propose a dendritic learning-incorporated vision Transformer(DVT),which out-performs other state-of-the-art methods on three image recognition benchmarks.

关键词： Image network image

Numerical Simulation on Radon Retardation Behavior of Covering Floats in Radon-Containing Water

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Biomedical and Environmental Sciences 2024年第4期37卷 406-417页

作者： LIU Shu Yuan zhang Li YE Yong Jun DING Ku Ke National Institute for Radiological Protection Chinese Center for Disease Control and PreventionBeijing 100088China Office for Public Health Management Chinese Center for Disease Control and PreventionBeijing 102206China Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy University of South ChinaHengyang 421001HunanChina

Objective This study aimed to efficiently reduce the release of radon from water bodies to protect the *** Based on the sizes of the experimental setup and modular float,computational fluid dynamics(CFD)was used to assess the impact of the area coverage rate,immersion depth,diffusion coefficient,and radon transfer velocity at the gas–liquid interface on radon migration and exhalation of radon-containing *** on the numerical simulation results,an estimation model for the radon retardation rate was *** effectiveness of the CFD simulation was evaluated by comparing the experimental and simulated variation values of the radon retardation rate with the coverage area *** The effect of radon transfer velocity on radon retardation in water bodies was minor and insignificant according to the appropriate value;therefore,an estimation model of the radon retardation rate of the coverage of a radon-containing water body was constructed using the synergistic impacts of three factors:area coverage rate,immersion depth,and diffusion *** deviation between the experimental and simulated results was<4.3%.Conclusion Based on the numerical simulation conditions,an estimation model of the radon retardation rate of covering floats in water bodies under the synergistic effect of multiple factors was obtained,which provides a reference for designing covering floats for radon retardation in radoncontaining water.

关键词： Radon-containing water Radon retardation rate CFD Coverage experiment Optimized design

An integrated strategy of UPLC-Q-TOF/MS and HPTLC/PAD-DESI-MSI for the analysis of chemical variations:A case study of Tibetan medicine Tiebangchui

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Journal of Pharmaceutical Analysis 2024年第4期14卷 615-618页

作者： Yue Liu Mengjia Li xing Fu Yi zhang Ce Tang State Key Laboratory of Southwestern Chinese Medicine Resources School of Ethnic MedicineChengdu University of Traditional Chinese MedicineChengdu611137China Meishan Hospital of Chengdu University of Traditional Chinese Medicine MeishanSichuan620010China Innovative Institute of Chinese Medicine and Pharmacy Chengdu University of Traditional Chinese MedicineChengdu611137China

The dried roots of Aconitum pendulum Busch are the major source of a commonly used Tibetan medicine,namely Tiebangchui(TBC)(Fig.S1).However,raw TBC contains a large amount of high toxic diester-diterpenoid alkaloids(DDAs),and the improper use would cause arrhythmia,irreversible cardiovascular damages,and even death.“Paozhi”,an appropriate processing method,is the essential prerequisite for the safe clinical application of ***-decocting and sand-frying are commonly used processing methods for toxicity attenuation and efficacy preservation for TBC.

关键词： dried irreversible roots

添加WC颗粒对镁合金表面等离子喷涂Al基涂层耐腐蚀和耐磨损性能的影响

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Transactions of Nonferrous Metals Society of China 2024年第7期34卷 2275-2288页

作者： Haroon RASHID 雒晓涛董昕远张黎李长久西安交通大学材料科学与工程学院金属材料强度国家重点实验室西安710049

常规热喷涂工艺制备的金属涂层内的粒子界面弱结合导致其不能为基材提供长效的腐蚀防护,因此,采用大气等离子喷涂,实现粒子间的冶金结合,制备高致密Al-15%WC(体积分数)复合涂层。结果表明,由于WC颗粒中C元素的去氯效应,以及超高温熔滴(>... 详细信息

常规热喷涂工艺制备的金属涂层内的粒子界面弱结合导致其不能为基材提供长效的腐蚀防护,因此,采用大气等离子喷涂,实现粒子间的冶金结合,制备高致密Al-15%WC(体积分数)复合涂层。结果表明,由于WC颗粒中C元素的去氯效应,以及超高温熔滴(>1800℃)间的自冶金结合,在最优等离子喷涂条件下制备出无氧化物杂质的涂层。涂层的致密结构使其表现出优异耐腐蚀性能,其腐蚀电流密度比镁合金基体降低4个数量级,比纯铝块材降低2个数量级。WC硬质颗粒的添加使Al-WC复合涂层的耐磨损性能相较纯Al块材提高1个数量级。

关键词：大气等离子喷涂 Al-WC涂层自冶金结合去氧效应耐腐蚀性耐磨性

Research on a TOPSIS energy efficiency evaluation system for crude oil gathering and transportation systems based on a GA-BP neural network

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Petroleum Science 2024年第1期21卷 621-640页

作者： Xue-Qiang zhang Qing-Lin Cheng Wei Sun Yi Zhao Zhi-Min Li Key Lab of Ministry of Education for Enhancing the Oil and Gas Recovery Ratio Northeast Petroleum UniversityDaqing163318HeilongjiangChina China Petroleum Pipeline Material and Equipment Co. LtdLangfang065000HebeiChina Research Institute of Petroleum Engineering and Technology Sinopec Northwest Oilfield CompanyUrumqi830011XinjiangChina

As the main link of ground engineering,crude oil gathering and transportation systems require huge energy consumption and complex *** is necessary to establish an energy efficiency evaluation system for crude oil gathering and transportation systems and identify the energy efficiency *** this paper,the energy efficiency evaluation system of the crude oil gathering and transportation system in an oilfield in western China is *** with the big data analysis method,the GA-BP neural network is used to establish the energy efficiency index prediction model for crude oil gathering and transportation *** comprehensive energy consumption,gas consumption,power consumption,energy utilization rate,heat utilization rate,and power utilization rate of crude oil gathering and transportation systems are *** the efficiency and unit consumption index of the crude oil gathering and transportation system,the energy efficiency evaluation system of the crude oil gathering and transportation system is established based on a game theory combined weighting method and TOPSIS evaluation method,and the subjective weight is determined by the triangular fuzzy analytic hierarchy *** entropy weight method determines the objective weight,and the combined weight of game theory combines subjectivity with objectivity to comprehensively evaluate the comprehensive energy efficiency of crude oil gathering and transportation systems and their ***,the weak links in energy utilization are identified,and energy conservation and consumption reduction are *** above research provides technical support for the green,efficient and intelligent development of crude oil gathering and transportation systems.

关键词： Crude oil gathering and transportation system GA-BP neural network Energy efficiency evaluation TOPSIS evaluation method Energy saving and consumption reduction

Integrating Shipborne Images with Multichannel Deep Learning for Landslide Detection

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Journal of Earth Science 2024年第1期35卷 296-300页

作者： Pengfei Feng Changdong Li Shuang zhang Jie Meng Jingjing Long School of Mechanical Engineering and Electronic Information China University of GeosciencesWuhan 430074China Faculty of Engineering China University of GeosciencesWuhan 430074China Department of Civil Badong National Observation and Research Station of Geohazards China University of GeosciencesWuhan 430074China College of Geology Engineering and Geomatics Changan UniversityXi'an 710054China Department of Geosciences University of OsloOslo 0316Norway

0 *** disasters in recession zones along riverbanks impose significant global social,economic,and ecological *** areas are particularly susceptible to *** inflict significant harm due to fluctuating water levels(Meng et al.,2023;Dai et al.,2021;Li et al.,2021).This,in turn,endangers the safety and accessibility of roads and waterways adjacent to rivers,and hydropower station and reservoir security(Yan et al.,2022;Guo et al.,2020;Tang et al.,2017).

关键词： reservoir Landslide Ship

2015-2021年我国城乡居民死亡状况分析

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疾病监测 2024年第3期39卷 369-375页

作者：凌鑫林秀文张莹肖瑶广州医科大学公共卫生学院广东广州511436 广州医科大学卫生管理学院广东广州511436

目的了解2015-2021年我国居民死亡率及死亡原因,为制定卫生政策和疾病防控提供依据。方法利用《中国死因监测数据集》和《中国卫生健康统计年鉴》中2015-2021年城乡居民死亡数据,分析死亡率、平均年度变化百分比(AAPC)、构成比等指标... 详细信息

目的了解2015-2021年我国居民死亡率及死亡原因,为制定卫生政策和疾病防控提供依据。方法利用《中国死因监测数据集》和《中国卫生健康统计年鉴》中2015-2021年城乡居民死亡数据,分析死亡率、平均年度变化百分比(AAPC)、构成比等指标。结果 2015-2021年我国城市、农村、男性、女性年均粗死亡率分别为627.87/10万、693.31/10万、765.15/10万、574.01/10万,均呈上升趋势(AAPC=0.71%、1.54%、1.13%、1.42%,P=0.007、0.004、0.005、0.002);标化死亡率分别为676.60/10万、748.67/10万、895.45/10万、565.41/10万,均呈现下降趋势(AAPC=-4.16%、-1.95%、-2.37%、-2.89%,P<0.001、0.015、0.001、0.005)。农村居民年均粗死亡率(χ^(2)=27 188.022,P<0.001)和年均标化死亡率(χ^(2)=30 570.094,P<0.001)均高于城市居民,男性年均粗死亡率(χ^(2)=258 728.380,P<0.001)和年均标化死亡率(χ^(2)=706 679.858,P<0.001)均高于女性。城市新生儿、婴儿、5岁以下儿童、孕产妇死亡率均高于农村(χ^(2)=30 241.791、48 081.135、86 265.732、101.718,均P<0.001),城乡合计死亡率均呈逐年下降趋势(AAPC=-9.02%、-7.71%、-6.89%、-3.67%,均P<0.001)。心脏病、恶性肿瘤、脑血管病、呼吸系统疾病、损伤及中毒占据城乡居民死因顺位前五,至2021年共占城市和农村居民整体死亡人数的85.87%和87.35%。结论我国农村居民死亡率明显高于城市,且孕产妇与儿童死亡率仍有较大差距;循环、呼吸系统疾病和恶性肿瘤等慢性非传染病是威胁居民身体健康的主要疾病;政府应在医疗公共资源分配上进行合理倾斜,加强重大死因的防治工作。

关键词：死亡率死因构成平均年度变化百分比城乡居民

Clarification of the dispersion mechanism of cathode slurry of lithium-ion battery under effects of both poly vinylidene fluoride/carbon black ratio and mixing time

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Particuology 2024年第5期88卷 116-127页

作者： Zhilong Wang Zhenzhen Zhao Ye Yang An zhang Xiayi Liu Tong Zhao Yahui Cui School of Mechanical and Precision Instrument Engineering Xi'an University of TechnologyXi'an 710048China

This paper presents the effects of both poly vinylidene fluoride(PVDF)/carbon black(CB)ratio(m PVDF:m CB)and mixing time t on the dispersion mechanism of the cathode slurry of lithium-ion battery(LIB).The dispersion mechanism is deduced from the electrochemical,morphological and rheological properties of the cathode slurry by using electrical impedance spectroscopy(EIS),scanning electron microscopy and rheology methods,*** the perspective of EIS method,static simulation models are established in the COMSOL Multiphysics software;meanwhile,the simulated results are used to verify the correctness of the electrochemical properties of the cathode *** a result,the following conclusions are able to be ***,in the case of the mass ratio m_(PVDF):m_(CB)=5:10,LiCoO_(2) particles are completely coated by the mixture of CB and PVDF to form a stable polymer gel *** or lower m_(PVDF):m_(CB) leads to the larger impedance and worse dispersion status for the cathode ***,when t=6 min,a good gel-like conductive network structure is formed by coating the thinner evenly dispersed CB–PVDF double layer around LiCoO_(2) ***,a strategy regarding to both m_(PVDF):m_(CB) and t in experimental scale is proposed,which has the capability of improving the performance of LIB.

关键词： Cathode slurry Dispersion mechanism Lithium-ion battery(LIB)