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教师支持如何影响初中生外化问题行为--基于CEPS数据的实证研究

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潍坊工程职业学院学报 2024年第2期37卷 100-108页

作者：陈曦萌谭小凤南宁师范大学职业技术师范学院南宁530001

运用目前最新的“中国教育追踪调查”(CEPS)2014-2015学年追访调查数据,探讨教师支持对初中生外化问题行为的影响及其作用机制。研究发现:教师支持显著负向预测初中生的外化问题行为。进一步中介效应分析发现,同伴关系在教师支持与外化... 详细信息

运用目前最新的“中国教育追踪调查”(CEPS)2014-2015学年追访调查数据,探讨教师支持对初中生外化问题行为的影响及其作用机制。研究发现:教师支持显著负向预测初中生的外化问题行为。进一步中介效应分析发现,同伴关系在教师支持与外化问题行为之间起部分中介作用。此外,情绪弹性在教师支持与同伴关系之间具有负向调节作用,即与高情绪弹性的初中生相比,低情绪弹性的初中生通过教师支持影响同伴关系的作用更强。研究结果启示应凸显同伴关系与教师支持对初中生外化问题行为的保护性作用,尤其要关注低情绪弹性初中生的同伴关系与行为表现。

关键词：初中生教师支持外化问题行为同伴关系情绪弹性

老年AECOPD患者下呼吸道感染的病原学特征及与炎症免疫平衡的关系研究

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现代生物医学进展 2024年第14期24卷 2650-2655+2671页

作者：于爽张玉娇王娜娜高璠谭效锋刘美蓉天津市天津医院普内科

目的：探讨老年慢性阻塞性肺疾病急性加重期（AECOPD）患者下呼吸道感染的病原学特征及与炎症免疫平衡的关系，以期为老年AECOPD患者下呼吸道感染的诊治提供参考。方法：选取2020年6月～2023年6月我院收治的AECOPD患者下呼吸道感染80例... 详细信息

目的：探讨老年慢性阻塞性肺疾病急性加重期（AECOPD）患者下呼吸道感染的病原学特征及与炎症免疫平衡的关系，以期为老年AECOPD患者下呼吸道感染的诊治提供参考。方法：选取2020年6月～2023年6月我院收治的AECOPD患者下呼吸道感染80例为试验组，另选取同期未发生下呼吸道感染80例为对照组。分析老年AECOPD患者下呼吸道感染的病原菌分布和耐药性，比较两组炎症因子[降钙素原（PCT）、肿瘤坏死因子（TNF-α）、白介素6（IL-6）]及T细胞亚群（CD3+、CD4+、CD4+/CD8+）水平差异，Logistic回归分析老年AECOPD患者下呼吸道感染的影响因素，接收者工作特征曲线（ROC）分析法探讨相关指标对老年AECOPD患者下呼吸道感染的预测效能。结果：80例老年AECOPD下呼吸道感染患者共检出91株病原菌，其中革兰阴性杆菌83株（91.21%），革兰阳性球菌7株（7.69%%），真菌1株（1.10%）。铜绿假单胞菌、肺炎克雷伯菌对哌拉西林、左氧氟沙星、环丙沙星以外的抗生素耐药率均低于30%；鲍曼不动杆菌耐药率普遍较高；大肠埃希菌对美罗培南、亚胺培南、阿米卡星耐药率较低。相较于对照组，试验组血清PCT、TNF-α、IL-6水平较高，血清CD3+、CD4+、CD4+/CD8+水平较低（P<0.05）。Logistic回归分析显示，机械通气、低蛋白血症、糖尿病及高水平PCT、TNF-α、IL-6为老年AECOPD患者下呼吸道感染危险因素，高水平CD4+/CD8+为老年AECOPD患者下呼吸道感染保护因素（P<0.05）。ROC分析显示：部分炎症因子、T细胞亚群及临床特征等8项指标单独及联合应用时的曲线下面积（AUC）分别为0.651、0.650、0.644、0.703、0.734、0.737、0.769、0.890，显见联合应用诊断效能很高。结论：老年AECOPD患者下呼吸道感染主要为革兰阴性杆菌，且耐药形势较为严峻；机械通气、低蛋白血症、糖尿病是老年AECOPD患者下呼吸道感染的影响因素，同时炎症免疫失衡参与了老年AECOPD患者下呼吸道感染的发生发展。基于部分炎症因子、T细胞亚群及临床特征等8项指标联合应用对老年AECOPD患者下呼吸道感染的预测效能较高。

关键词：老年 AECOPD 下呼吸道感染病原学炎症免疫平衡危险因素预测效能

Fast nuclear-spin gates and electrons−nuclei entanglement of neutral atoms in weak magnetic fields

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Frontiers of physics 2024年第2期19卷 179-203页

作者： xiao-feng Shi School of Physics Xidian UniversityXi’an 710071China

We present a novel class of Rydberg-mediated nuclear-spin entanglement in divalent atoms with global laser ***,we show a fast nuclear-spin controlled phase gate of an arbitrary phase realizable either with two laser pulses when assisted by Stark shifts,or with three ***,we propose to create an electrons−nuclei-entangled state,which is named a super bell state(SBS)for it mimics a large Bell state incorporating three small Bell ***,we show a protocol to create a three-atom electrons-nuclei entangled state which contains the three-body W and Greenberger−Horne−Zeilinger(GHZ)states *** protocols possess high intrinsic fidelities,do not require single-site Rydberg addressing,and can be executed with large Rydberg Rabi frequencies in a weak,Gauss-scale magnetic *** latter two protocols can enable measurement-based preparation of Bell,hyperentangled,and GHZ states,and,specifically,SBS can enable quantum dense coding where one can share three classical bits of information by sending one particle.

关键词： nuclear-spin qubit electrons−nuclei entanglement super Bell state Greenberger−Horne−Zeilinger state Rydberg-mediated entanglement quantum dense coding

Dielectric and energy storage properties of PbO–SrO–Nb_(2)O_(5)–Na_(2)O–Si thin films by annealing

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Rare Metals 2024年第1期43卷 351-355页

作者： Fei-Hu tan Qing-Meng Zhang feng Wei Hong-Bin Zhao xiao Zhang Jun Du State Key Laboratory of Advanced Materials for Smart Sensing General Research Institute for Nonferrous MetalsBeijing 100088China Advanced Electronic Materials Institute General Research Institute for Nonferrous MetalsBeijing 100088China

Dielectric and energy storage properties of PbOSrO-Na_(2)O-Nb_(2)O_(5)-SiO_(2)(PSNNS) thin films with annealing temperature from 700 to 850 ℃ were investigated by measuring their capacitance-electric filed curve and hysteresis *** results show that the highest dielectric constant and energy density are 81.2 and 17.0 J·cm^(-3),respectively,which is obtained in the sample with annealing temperature of 800 ℃.Annealed from 700 to800 ℃,the dielectric constant and energy storage performance of PSNNS films are continuously ***,with annealing temperature up to 850 ℃,their dielectric constant decreases,which might be related with the removal of interfacial defects as a function of annealing *** is one of the causes of space charge phenomenon,resulting in the increase in dielectric ***,the micro structure analysis by X-ray diffraction(XRD) and transmission electron microscope(TEM) indicates that the change of crystallization phase and interfacial polarization takes responsibility to the results.

关键词： Thin film Pulse laser deposition Annealing temperature Energy storage density

Hot Compression Behavior and Tensile Property of a Novel Ni-Co-Based Superalloy Prepared by Electron Beam Smelting Layered Solidification Technology

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Acta Metallurgica Sinica(English Letters) 2024年第2期37卷 283-292页

作者： Yong-Chao Gai Rui Zhang Chuan-Yong Cui Zi-Jian Zhou Yi tan Yi-Zhou Zhou xiao-feng Sun Key Laboratory of Materials Modification by Laser Ionand Electron Beams(Ministry of Education)School of Materials Science and EngineeringDalian University of TechnologyDalian116024China Shi-Changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang110016China

The hot compression behavior and tensile strength after compression of a new Ni-Co-based superalloy produced using electron beam smelting layered(EBSL)solidification technology were *** compression tests were performed at temperatures of 1120℃and 1150℃,with strain rates of 1 s^(-1) and 0.01 s^(-1),reaching a true strain of *** strength was evaluated at room *** results revealed that this EBSL technology accelerates dynamic recrystallization(DRX),without compromising the strength of alloy.A significant correlation between the volume fraction of DRX and the strain rate was observed,with higher fractions at lower strain rates,leading to higher tensile ***,at the same strain rate,the specimens compressed at 1120℃exhibited higher tensile strength due to undissolvedγ′*** solution and aging heat treatment,the alloy maintained high tensile *** results suggested that the EBSL Ni-Co-based superalloy offers excellent prospects for practical applications.

关键词： Ni-Co-based superalloy Hot deformation Electron beam smelting Tensile strength

Fluoro-functionalized plant biomass adsorbent:Preparation and application in extraction of trace perfluorinated compounds from environmental water samples

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Journal of Environmental Sciences 2024年第3期137卷 703-715页

作者： Xi tan Yan Shi Chun-feng Ma Quan Chi Yu-Hang Yang Wen-Xiang Zhang Hua-Ming xiao Xian Wang Key Laboratory of Analytical Chemistry of the State Ethnic Affairs Commission School of Chemistry and Materials ScienceSouth-Central Minzu UniversityWuhan 430074China School of Pharmaceutical Sciences South-Central Minzu UniversityWuhan 430074China Key Laboratory of Oilseeds Processing of Ministry of Agriculture Hubei Key Laboratory of Lipid Chemistry and NutritionOil Crops Research Institute of the Chinese Academy of Agricultural SciencesWuhan 430062China

Perfuorinated compounds(PFCs)are toxic and widely present in the environment,and therefore effective adsorbents are required to remove PFCs from environmental *** the present study,a new type of fuorinated biomass materials was synthesized via an ingenious fuorosilanization *** adsorbents were applied for the adsorption of 13typical PFCs,including perfuorocarboxylic acids(PFCAs)and perfuorosulfonic acids(PFSAs).By comparing their adsorption performance,Fluorinated cedar slag(FCS)was discovered to have the best absorption efficiency and enabled highly efficient enrichment of *** adsorption recovery of FCS with the investigated PFCs is greater than 90%under the optimal adsorption *** to the high affinity of F-F sorbent-sorbate interaction,FCS had good adsorption capacities of PFCs from aqueous solution,with the maximum adsorption capacity of 15.80 mg/g for PFOS and 10.71 mg/g for PFOA,***,the adsorption time could be achieved in a short time(8 min).Using the FCS absorbent,an innovative FCS-solid phase extraction assisted with high performance liquid chromatography-electrospray-tandem mass spectrometry(FCS-SPE-HPLC-ESI-MS/MS)method was first developed to sensitively detect PFCs in the environmental water *** intra-day and inter-day recovery rates of the 13 compounds ranged from 90.7%-104.3%,with the RSD of 2.1%-4.7%(intra-day)and 2.5%-8.5%(inter-day),*** research demonstrates the potential of the newly fuoro-functionalized plant biomass to adsorb PFCs from environmental water,with the advantages of high adsorption efficiencies,high antiinterference,easy operation and low economic cost.

关键词： Fluoro-functionalized biomass Perfuorinated compounds(PFCs) Adsorption efficiency Mass spectrometry(MS) Fluorinated cedar slag(FCS)

A Trust Evaluation Mechanism Based on Autoencoder Clustering Algorithm for Edge Device Access of IoT

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Computers, Materials & Continua 2024年第2期78卷 1881-1895页

作者： xiao feng Zheng Yuan Cyber Security Academy Beijing University of Posts and TelecommunicationsBeijing100876China Department of Cyberspace Security Beijing Electronic Science and Technology InstituteBeijing100070China State Grid Info-Telecom Great Power Science and Technology Co. Ltd.Beijing102211China

First,we propose a cross-domain authentication architecture based on trust evaluation mechanism,including registration,certificate issuance,and cross-domain authentication processes.A direct trust evaluation mechanism based on the time decay factor is proposed,taking into account the influence of historical interaction *** weight the time attenuation factor to each historical interaction record for updating and got the new historical record *** refer to the beta distribution to enhance the flexibility and adaptability of the direct trust assessment model to better capture time trends in the historical *** we propose an autoencoder-based trust clustering *** perform feature extraction based on *** leibler(KL)divergence is used to calculate the reconstruction *** constructing a convolutional autoencoder,we introduce convolutional neural networks to improve training efficiency and introduce sparse constraints into the hidden layer of the *** sparse penalty term in the loss function measures the difference through the KL *** clustering is performed based on the density based spatial clustering of applications with noise(DBSCAN)clustering *** the clustering process,edge nodes have a variety of trustworthy attribute *** assign different attribute weights according to the relative importance of each attribute in the clustering process,and a larger weight means that the attribute occupies a greater weight in the calculation of ***,we introduced adaptive weights to calculate comprehensive trust *** experiments prove that our trust evaluation mechanism has excellent reliability and accuracy.

关键词： Cross-domain authentication trust evaluation autoencoder

Trends in Fruit and Vegetable Intake Among the Labor Force Population—China,2010-2018

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China CDC weekly 2024年第18期6卷 401-407,I0008页

作者： Lan Wang Mei Zhang xiao Zhang Zhenping Zhao Chun Li Mengting Yu Taotao Xue feng tan Limin Wang Division of Chronic Disease and Risk Factor Surveillance National Center for Chronic and Non-communicable Disease Control and PreventionChinese Center for Disease Control and PreventionBeijingChina Chinese Center for Disease Control and Prevention BeijingChina

Introduction:This research investigates trends pertaining to the prevalence of low fruit and vegetable consumption among the labor force population in *** study considered data derived from four nationally representative cross-sectional ***:The data under review for this study was derived from the China Chronic Disease and Risk Factor Surveillance(CCDRFS)carried out in 2010,2013,2015,and 2018,*** utilized a food frequency questionnaire to evaluate the quantity and frequency of fruit and vegetable *** estimated prevalence of low fruit and vegetable consumption was calculated for each survey,while considering factors such as sex,age,location,and socioeconomic status(SES).Participants’SES was ascertained via latent class analysis,serving to identify distinct classes based on criteria such as education,occupation,and household income per *** regression was deployed to determine the statistical significance of ***:From 2010 to 2018,there was a notable increase in the average daily consumption of vegetables and fruits among the working population,rising from 418.6 g/day to 491.8 g/day(P0.05 for trend).Conclusion:Over the past nine years,there has been a notable decline in the prevalence of low fruit and vegetable consumption among the labor force population in ***,the comparatively deficient intake of fruits and vegetables evident among individuals of lower SES warrants further attention.

关键词： intake occupation utilized

Precisely modulating covalent and coordination bonds in the porous network for highly selective metal ion extraction

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Science China Chemistry 2024年第4期67卷 1039-1040页

作者： Jie Li xiao feng Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials Key Laboratory of Cluster ScienceMinistry of EducationAdvanced Technology Research Institute(Jinan)Frontiers Science Center for High Energy MaterialSchool of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijing 100081China

Scandium(Sc)is recognized as a“strategic”and“critical”element by several countries,including the *** Russia,owing to its wide range of applications in high-tech fields such as superconductivity,alloys,lasers,nucle... 详细信息

关键词： alloys coordination network