检索结果-南通市图书馆

维普期刊数据库博看期刊

微纳米曝气对黑臭水体底泥减量及气溶胶产生的影响

在线全文

学校读者我要写书评

暂无评论

中国给水排水 2024年第11期40卷 19-23页

作者：张铠王怡张倩赵慧莹赵子异崔海航西安建筑科技大学环境与市政工程学院陕西西安710055 西安建筑科技大学西北水资源与环境生态教育部重点实验室陕西西安710055 西安建筑科技大学建筑设备科学与工程学院陕西西安710055

微纳米曝气是治理黑臭水体的主要方法之一,但目前关于其对底泥减量和气溶胶产生的影响研究有限。为此,以普通曝气与微纳米曝气作为对比,研究了微纳米曝气对黑臭水体底泥减量及气溶胶产生的影响。结果表明,微纳米曝气处理后,有机酸基团... 详细信息

微纳米曝气是治理黑臭水体的主要方法之一,但目前关于其对底泥减量和气溶胶产生的影响研究有限。为此,以普通曝气与微纳米曝气作为对比,研究了微纳米曝气对黑臭水体底泥减量及气溶胶产生的影响。结果表明,微纳米曝气处理后,有机酸基团和可溶性微生物代谢产物基团成为间隙水中荧光性有机物的主要成分,同时底泥中值粒径减小,有利于后续的减量处理。与普通曝气相比,微纳米曝气对底泥中挥发性固体(VS)和总固体(TS)的去除效果较好,去除率分别为38.88%和27.72%,可实现底泥的原位减量。此外,微纳米曝气组的PM2.5质量浓度和碳质气溶胶浓度均低于普通曝气组。因此,微纳米曝气用于黑臭水体治理时具有提高底泥减量效率和有效控制气溶胶产生的潜力。

关键词：微纳米曝气黑臭水体底泥减量气溶胶

在线全文

学校读者我要写书评

暂无评论

塑料光催化降解回收处理技术的研究进展

塑料科技 2024年第7期52卷 141-146页

作者：赵慧莹李伟刘丰颉熊健吕学斌西藏大学生态环境学院西藏拉萨850000

为减轻塑料废弃物所带来的环境污染,对塑料光催化降解回收处理方式进行研究,从而利用太阳能光引发和光催化的降解机理将塑料转化为水和二氧化碳或进一步转化为氢气燃料和高值化学品。文章介绍催化剂特性、塑料和降解条件对光催化降解的... 详细信息

为减轻塑料废弃物所带来的环境污染,对塑料光催化降解回收处理方式进行研究,从而利用太阳能光引发和光催化的降解机理将塑料转化为水和二氧化碳或进一步转化为氢气燃料和高值化学品。文章介绍催化剂特性、塑料和降解条件对光催化降解的影响,总结不同种类的无机金属、非金属材料以及有机-无机复合材料光催化剂在光催化降解回收处理中的应用,旨在通过催化剂的改性、与电催化、热催化、生物催化协同作用提升光催化效率。文章指出光催化降解塑料回收处理技术在预处理、处理后存在的问题,为废弃塑料的回收处理提供可靠依据和研究方向。

关键词：塑料降解光催化降解处理技术协同处理

教育数字化背景下国外学习中心建设对我国的启示——基于《2023地平线报告(教与学版)》的多案例分析

在线全文

学校读者我要写书评

暂无评论

大学图书情报学刊 2024年第5期42卷 133-139页

作者：曾湘琼赵慧颖湘潭大学图书馆 411105 湘潭大学公共管理学院 411105

教育数字化转型是将数字技术整合应用到教育领域的各个层面,强调数字技术应用发展对育人的重要性。未来学习中心自提出以来就强调新技术的应用发展,其建设顺应了教育数字化转型的趋势。《2023地平线报告(教与学版)》从全球数字化转型视... 详细信息

教育数字化转型是将数字技术整合应用到教育领域的各个层面,强调数字技术应用发展对育人的重要性。未来学习中心自提出以来就强调新技术的应用发展,其建设顺应了教育数字化转型的趋势。《2023地平线报告(教与学版)》从全球数字化转型视角,探究多维度下影响高等教育发展的重要因素,为我国高校图书馆探索建设未来学习中心提供了理论指导。文章通过对《2023地平线报告(教与学版)》提出的社会维度和技术维度进行宏观分析,结合国外高校学习中心的建设案例,总结其对教育数字化转型背景下我国高校建设未来学习中心的重要启示。

关键词：高校图书馆未来学习中心教育数字化地平线报告

人际信任和社交焦虑在欺凌受害与孤独感之间的多重中介作用

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

中国健康教育 2024年第7期40卷 662-665,670页

作者：权方英丁文博归梦琼赵颖慧李宏翰广西师范大学教育学部心理学系广西桂林541004 广西高校认知神经科学与应用心理重点实验室广西桂林541004 广西高校人文社会科学重点研究基地广西民族教育发展研究中心广西桂林541004 桂林市田家炳中学广西桂林541004

目的考察人际信任和社交焦虑在欺凌受害与孤独感之间的中介作用。方法采用特拉华欺凌受害量表、加州大学洛杉矶分校孤独量表、人际信任量表、儿童社交焦虑量表对460名中学生进行调查。结果欺凌受害与孤独感显著相关(β=0.23,P<0.001)。... 详细信息

目的考察人际信任和社交焦虑在欺凌受害与孤独感之间的中介作用。方法采用特拉华欺凌受害量表、加州大学洛杉矶分校孤独量表、人际信任量表、儿童社交焦虑量表对460名中学生进行调查。结果欺凌受害与孤独感显著相关(β=0.23,P<0.001)。人际信任、社交焦虑、孤独感两两显著相关(β=-0.27,-0.39,0.56;P均<0.001)。潜变量结构方程模型拟合指标为:χ^(2)/df=3.17,RMSEA=0.07,SRMR=0.05,CFI=0.95,TLI=0.93。中介效应检验结果显示欺凌受害与孤独感之间的中介路径显著:欺凌受害→人际信任→社交焦虑→孤独感(中介效应值0.03),95%的置信区间均不包含0。结论中学生欺凌受害不仅会直接预测孤独感,还会通过人际信任和社交焦虑间接预测孤独感。这些结果为预防和干预中学生的孤独感提供了实践启示。

关键词：欺凌受害孤独感人际信任社交焦虑中介作用

Optical Coherence Tomography Features of Tuberculous Serpiginous-like Choroiditis and Serpiginous Choroiditis

在线全文

学校读者我要写书评

暂无评论

Biomedical and Environmental Sciences 2018年第5期31卷 327-334页

作者： wang xiao na you qi sheng zhao hui ying peng xiao yan Beijing Institute of Ophthalmology Beijing Tongren Eye Center Beijing Ophthalmology and Visual Science Key Lab Beijing Tongren Hospital Capital Medical University Beijing 100730 China

Objective To investigate optical coherence tomography（OCT） characteristics of tuberculous serpiginous-like choroiditis（Tb-SLC） and serpiginous choroiditis（SC） and to perform OCT to differentiate between these *** This retrospective,case-control study examined consecutively enrolled patients with active Tb-SLC or *** underwent comprehensive ocular examinations and imaging（OCT,color fundus photography,autofluorescence imaging,fluorescein angiography,and indocyanine green angiography）.Findings were examined and compared between eyes with SC and *** Nine patients with active Tb-SLC（14 eyes） and 8 with active SC（12 eyes） were *** following OCT findings were observed significantly more often in the Tb-SLC group than in the SC group： vitreal hyper-reflective spots [5 Tb-SLC eyes（36%）,no SC eyes：P = 0.02],intraretinal edema [11 Tb-SLC eyes（79%）,3 SC eyes（25%）：P = 0.01],sub-retinal pigment epithelium（RPE） drusenoid deposits [11 Tb-SLC eyes（79%）,2 SC eyes（17%）：P 〈 0.01],and choroidal granulomas [8 Tb-SLC eyes（57%）,2 SC eyes（17%）：P = 0.03].A hyporeflective,wedge-shaped band was observed more often in the SC group [5 Tb-SLC eyes（36%）,9 SC eyes（75%）：P = 0.045] than in the Tb-SLC *** incidence of other OCT signs did not differ between the groups and included outer nuclear layer hyper-reflection,outer retinal tabulation,and choriocapillaris point-like *** Vitreal hyper-reflective spots,intraretinal fluid,sub-RPE drusenoid deposits,and choroidal granulomas on OCT images may indicate ***,a hyporeflective,wedge-shaped band may indicate ***,OCT is likely helpful in differentiating between Tb-SLC and SC.

关键词： Optical coherence tomography Choroiditis Serpiginous Tuberculosis

The Microstructures of Butterfly Wing Scales in Northeast of China

在线全文

学校读者我要写书评

暂无评论

Journal of Bionic Engineering 2007年第1期4卷 47-52页

作者： Li-yan Wu Zhi-wu Han zhao-mei Qiu hui-ying Guan Lu-quan Ren Key Laboratory for Terrain-Machine Bionics Engineering （Ministry of Education China） School for Biological and Agricultural Engineering Jilin University （Nanling Campus） Changchun 130022 P. R. China

There are billions of tiny scales on the butterfly wings, which array regularly as the tiles on the roof. Such tilts can form various colors of the wing and afford the species many abilities to survive and propagate. Morphological experiments on the wing scales of six butterfly species living in northeast of China were conducted. By the optics microscope; the form, geometry dimension and array of the scales were observed generally. By using scanning electron microscope （SEM）, the 2D scanning and measurement were carried out and the surface micro configurations of scales were observed. The dimension and microstructure characteristics of the cross section of single scale were achieved through transmission electron microscope （TEM）. Finally, by using 3D software, three 3D models were described and the 3D visual effect was achieved. This work can put forward a basic method for the future study on the morphology of biological microstructure.

关键词： butterfly wing scale microstructure microscope

Assessment of bearing performance degradation via extension and EEMD combined approach

在线全文

学校读者我要写书评

暂无评论

Journal of Central South University 2017年第5期24卷 1155-1163页

作者： LIU Yu-mei zhao Cong-cong XIONG Ming-ye zhao ying-hui QIAO Ning-guo TIAN Guang-dong Transportation College Jilin UniversityChangchun 130022China College of Engineering and Technology Jilin Agricultural UniversityChangchun 130118China University of Illinois at Urbana-Champaign IllinoisChampaign-Urbana 61801USA Engineering Department Changchun Visteon Faway Automotive Electronics Co.Ltd.Changchun 130011China

As a key component in rotating machinery, the operating reliability of bearing influences the performance and service life of the equipment directly. In order to describe bearing performance degradation(BPD) process effectively, an assessment approach combining extension and ensemble empirical mode decomposition(EEMD) was proposed. First, the extension was utilized to construct the matter-element of bearing operating state, and the energy moment of intrinsic mode functions(IMFs) was used as characteristic parameter of the matter-element. Then, to determine classical domains of characteristic parameters, the mathematical statistics method was adopted. Finally, the BPD was analyzed qualitatively and quantitatively according to the comprehensive correlation degree of bearing current operating state related to its healthy state. The analytic results of bearing test-rig show that the proposed method indicates the incipient fault approximately occurring in the 81 st hour, and the method also quantitatively presents the degree of BPD. By contrast, the BPD assessment based on time-domain features extraction method could not achieve the above two results effectively.

关键词： bearing performance degradation assessment extension ensemble empirical mode decomposition mathematical statistics

Tuning interface mechanism of FeCo alloy embedded N,S-codoped carbon substrate for rechargeable Zn-air battery

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2024年第6期93卷 400-410,I0010页

作者： hui Chang Lulu zhao Shan zhao Zong-Lin Liu Peng-Fei Wang ying Xie Ting-Feng Yi School of Materials Science and Engineering Northeastern UniversityShenyang 110819LiaoningChina Key Laboratory of Functional Inorganic Material Chemistry Ministry of EducationSchool of Chemistry and Materials ScienceHeilongjiang UniversityHarbin 150080HeilongjiangChina Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province School of Resources and MaterialsNortheastern University at QinhuangdaoQinhuangdao 066004HebeiChina

The interface mechanism between catalyst and carbon substrate has been the focus of *** this paper,the FeCo alloy embedded N,S co-doped carbon substrate bifunctional catalyst(FeCo/S-NC)is obtained by a simple one-step pyrolysis *** experimental results and density functional theory(DFT)calculation show that the formation of FeCo alloy is conducive to promoting electron transfer,and the introduction of S atom can enhance the interaction between FeCo alloy and carbon substrate,thus inhibiting the migration and agglomeration of particles on the surface of carbon *** FeCo/SNC catalysts show outstanding performance for oxygen reduction reaction(ORR)and oxygen evolution reaction(OER).FeCo/S-NC shows a high half-wave potential(E_(1/2)=0.8823 V)for ORR and a low overpotential at 10 mA cm^(-2)(E_(j=10)=299 mV)for *** addition,compared with Pt/C+RuO_(2) assembled Zn-air battery(ZAB),the FeCo/S-NC assembled ZAB exhibits a larger power density(198.8 mW cm^(-2)),a higher specific capacity(786.1 mA h g_(zn)~(-1)),and ultra-stable cycle *** results confirm that the optimized composition and the interfacial interaction between catalyst and carbon substrate synergistically enhance the electrochemical performance.

关键词： FeCo alloy N S co-doped carbon DFT calculation Zn-air batteries Interfacial interaction

Changes of spring wind erosion based on wind erosion climate factor in the black soil region of Northeast China

在线全文

学校读者我要写书评

暂无评论

Journal of Mountain Science 2023年第6期20卷 1712-1724页

作者： YAN Ping JI Sheng-tai LI Xiu-fen ZHU Hai-xia WANG Liang-liang ZHAI Mo WANG Ping zhao hui-ying Heilongjiang Institute of Meteorological Sciences Harbin 150030China Innovation and Open Laboratory of Eco-meteorology in Northeast China China Meteorological AdministrationHarbin 150030China Heilongjiang Ecological Meteorological Center Harbin 150030China

The dry and windy climate and low ground cover in spring in the black soil region of Northeast China make the soil strongly affected by wind erosion,which seriously threatens the food security and ecological security of this *** this paper,based on the daily observation data of 124 meteorological stations in study area from 1961 to 2020,seasonal and monthly wind erosion climate factor(C)in spring(March to May)were calculated by using the method proposed by the Food and Agriculture Organization of the United Nations(FAO),the wind erosion characterization in spring were systematically analyzed based on C by various statistical analysis *** results showed that in the past 60 years,spring wind erosion climate factor(CSp)and monthly C of the whole region and each province(region)all showed highly significant decreasing trend,but they began to show rebounded trend in the middle or late *** of the study area showed a significant upward trend since 2008 with an increase of 4.59(10a)^(-1).The main contributors to this upward trend are the changes of C in March and in *** the four provinces(regions),CSp in Heilongjiang,Jilin,Liaoning and eastern Inner Mongolia all showed rebounded since 2008,2011,2008 and 2009,*** rebounded trend of CSp in eastern Inner Mongolia was the most obvious with a tendency rate of 11.27(10a)^(-1),and its mutation occurred after *** rebound trend of CSp in Heilongjiang Province takes the second place,with a trend rate of 4.72(10a)^(-1),but there’s no obvious time mutation *** spatial characteristics of CSpand monthly C are similar,showing decreasing characteristics centered on the typical black soil belt of Northeast *** with 1961-1990,in the period from 1991 to 2020,the proportion of high value areas(CSp>35,monthly C>10)has decreased to varying degrees,while the proportion of low value areas(CSp≤10,monthly C≤4)has *** trends of seasonal and monthly C in 82.2%~87.7%of the

关键词： Wind erosion climate erosivity Spatiotemporal 1characteristics Climate change Rebounded trend Typical black soil region Northeast China