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Journal of Systems Science & Complexity 2023年第3期36卷 1169-1188页

作者： YUAN Jing DONG Yajing zhai weijie CAI Zongwu School of Statistics Shandong Technology and Business UniversityYantai 264005China School of Statistics and Data Science Nankai UniversityTianjin 300071China Department of Economics University of KansasLawrenceKS 66045USA

With the increase of economic environment uncertainty,it is of great importance to study the linkage and spillover effects of economic policy uncertainty among ***,this article selects eight countries along the Belt and Road as the core countries(China,Korea,Croatia,India,Russia,Greece,Pakistan,and Singapore)and four countries(Germany,France,Japan,and UK)as the peripheral countries,and then copula technique and mixed-frequency global vector autoregressive model are employed to analyze the correlation and the spillover effect of the economic policy uncertainty(EPU)for the twelve selected countries,*** proposed empirical findings show clearly that the EPU correlation among the eight core Belt and Road countries is stronger and the spillover effect of the core countries to the peripheral countries is statistically *** a result,for harmonious and win-win development,the Belt and Road countries should pay a close attention to the EPU,because the stability of the EPU promotes greatly the economy development.

关键词： Belt and road initiative copula functions economic policy uncertainty global VAR spillover effects

Surface-functionalized design of blood-contacting biomaterials for preventing coagulation and promoting hemostasis

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Friction 2023年第8期11卷 1371-1394页

作者： Yi WANG weijie zhai Shujie CHENG Jinghua LI Hongyu ZHANG State Key Laboratory of Tribology in Advanced Equipment Department of Mechanical EngineeringTsinghua UniversityBeijing 100084China Basic Research Key Laboratory of General Surgery for Digital Medicine Affiliated Hospital of Hebei UniversityBaoding 071000China Beijing Key Laboratory of Advanced Manufacturing Technology Faculty of Materials and ManufacturingBeijing University of TechnologyBeijing 100124China

The anticoagulation and hemostatic properties of blood-contacting materials are opposite lines of research, but their realization mechanisms are inspired by each other. Contact between blood and implantable biomaterials is a classic problem in tribological research, as both antithrombotic and hemostatic materials are closely associated with this problem. Thrombus formation on the surfaces of blood-contacting biomedical devices can detrimentally affect their performance and patient life, so specific surface functionalization is required. Currently, intensive research has focused on the development of super-lubricated or super-hydrophobic coatings, as well as coatings that deliver antithrombotic drugs. In addition, hemostatic biomaterials with porous structures, biochemical substances, and strongly adhesive hydrogels can be used to achieve rapid and effective hemostasis via physical or biochemical mechanisms. This article reviews methods of preparing anticoagulant coatings on material surfaces and the current status of rapid hemostatic materials. It also summarizes fundamental concepts for the design and synthesis of anticoagulant and hemostatic materials by discussing thrombosis and hemostasis mechanisms in biomedical devices and normal organisms. Because there are relatively few reports reviewing the progress in surface-functionalized design for anticoagulation and hemostasis, it is anticipated that this review can provide a useful summary of the applications of both bio-adhesion and bio-lubrication techniques in the field of biomedical engineering.

关键词： anticoagulation hemostasis lubrication hydrogel fibrous membrane

Fiber Solar Cells from High Performances Towards Real Applications

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Advanced Fiber Materials 2022年第6期4卷 1293-1303页

作者： weijie zhai Zhengfeng Zhu Xuemei Sun Huisheng Peng State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular ScienceLaboratory of Advanced MaterialsFudan UniversityShanghai 200438China

The evolution of electronic systems towards small,flexible,portable and human-centered forms drives the demand for onbody power supplies with lightweight and high *** solar cells that can be integrated into soft and lightweight textiles are considered as potential sustainable power sources for the next generation of wearable *** this end,they have been extensively investigated in the past decade aiming to improve their photovoltaic performances,but there is still a big gap between the high-performance devices and real ***,the key advances of configurations,fabrications and performances of fiber solar cells are highlighted and *** on the current progress,the latest ideas with regard to the remaining challenges and opportunities beyond the reach of the previous studies are presented.

关键词： Flexible Fiber Solar cell Power textile

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慢性心力衰竭患者预后不良危险因素分析

河南医学研究 2024年第2期33卷 292-295页

作者：苗倩王雪翟伟洁梅艳阳南阳市中心医院心血管内科河南南阳473000

目的探讨慢性心力衰竭(CHF)患者预后情况及其影响因素。方法回顾性分析2020年5月至2022年8月在医院接受系统治疗的147例CHF患者临床资料,统计出院后6个月预后不良情况。应用单因素分析法筛选出患者预后不良的可能影响因素,并行logistic... 详细信息

目的探讨慢性心力衰竭(CHF)患者预后情况及其影响因素。方法回顾性分析2020年5月至2022年8月在医院接受系统治疗的147例CHF患者临床资料,统计出院后6个月预后不良情况。应用单因素分析法筛选出患者预后不良的可能影响因素,并行logistic回归分析确定独立危险因素。结果147例CHF患者出院后6个月预后不良48例(32.65%)。预后不良组与预后良好组年龄、高脂血症、心房颤动、纽约心脏病协会(NYHA)分级、贫血、尿酸(UA)、血肌酐(Scr)、尿素氮(BUN)、肾小球过滤(GFR)、脑钠肽(BNP)、查尔森共病指数(CCI)、自理能力比较,差异有统计学意义(P360μmol·L^(-1))、BUN(>7.1 mmol·L^(-1))、BNP(>1006 ng·L^(-1))、CCI评分(3分)、自理能力(重度依赖)是CHF患者预后不良独立危险因素(P<0.05)。结论CHF患者预后不良主要与年龄、贫血、UA、BUN、BNP、CCI评分、自理能力等有关。

关键词：慢性心力衰竭预后危险因素干预措施

维普期刊数据库博看期刊

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隧道爆破掘进中大斜线掏槽优化参数探讨

土工基础 2018年第1期32卷 93-94,110页

作者：翟伟杰赵其达拉图吴杰程康马勇彬武汉理工大学土木工程与建筑学院武汉430070 中支路桥华东工程有限公司上海201203

随着西部大开发的不断深入,国家对公路交通建设的投入越来越大,长大公路的需求量远超以前。我国是一个多山国家,在修建公路的过程中势必要穿山越岭,这就需要修建大量的隧道。隧道掘进的关键之一是中心掏槽,目前中心掏槽方法主要采用斜... 详细信息

随着西部大开发的不断深入,国家对公路交通建设的投入越来越大,长大公路的需求量远超以前。我国是一个多山国家,在修建公路的过程中势必要穿山越岭,这就需要修建大量的隧道。隧道掘进的关键之一是中心掏槽,目前中心掏槽方法主要采用斜线掏槽和直线掏槽。大斜线掏槽在隧道掘进爆破中得到了广泛应用,斜线的角度和长度是确保掘进进尺的关键参数之一,通过计算机模拟和现场试验,进行了不同掏槽角度的优化试验,得出了掏槽角度70°的优化角度结论;通过现场试验验证,效果优良。

关键词：隧道掘进斜线掏槽计算机模拟现场试验

Spatiotemporal Variability of Surface Wind Speed during 1961-2017 in the Jing-Jin-Ji Region,China

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Journal of Meteorological Research 2020年第3期34卷 621-632页

作者： weijie DIAO Yong ZHAO Yiyang DONG Jiaqi zhai Qingming WANG Yunpeng GUI State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin China Institute of Water Resources and Hydropower Research(IWHR)Beijing 100038 Department of Hydraulic Engineering Tsinghua UniversityBeijing 100084

Wind speed variations are influenced by both natural climate and human *** is important to understand the spatial and temporal distributions of wind speed and to analyze the cause of its *** this study,data from 26 meteorological stations in the Jing-Jin-Ji region of North China from 1961 to 2017 are analyzed by using the Mann-Kendall(MK)*** the study period,wind speed first decreased by−0.028 m s^-1 yr^-1(p<0.01)in 1961^-1991,and then increased by 0.002 m s^-1 yr^-1(p<0.05)in *** speed was the highest in spring(2.98 m s^-1),followed by winter,summer,and *** largest wind speed changes for 1961-1991 and 1992-2017 occurred in winter(−0.0392 and 0.0065 m s^-1 yr^-1,respectively);these values represented 36%and 58%of the annual wind speed *** than 90.4%of the wind speed was concentrated in the range of 1-5 m s^-1,according to the variation in the number of days with wind speed of different ***,the decrease in wind speed in 1961^-1991 was due to the decrease in days with wind speed of 3-5 m s^-1,while the increase in wind speed in 1992-2017 was mainly due to the increase in days with wind speed of 2-4 m s^-*** terms of driving factors,variations in wind speed were closely correlated with temperature and atmospheric pressure,whereas elevation and underlying surface also influenced these changes.

关键词： climate change Jing–Jin–Ji region Mann–Kendall(MK)trend test wind speed driving factors

Analysis of black soil compaction with driver-agricultural machinery-soil system under corn sowing with high-power tractor in Northeast China

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International Journal of Agricultural and Biological Engineering 2023年第4期16卷 167-172页

作者： Xiao Yang Zhiqiang zhai weijie Guo Wenjie Li Minli Yang Zhenghe Song State Key Laboratory of Intelligent Agricultural Power Equipment College of EngineeringChina Agricultural UniversityBeijing 100083China China Agricultural Mechanization Development Research Center College of EngineeringChina Agricultural UniversityBeijing 100083China

Soil compaction leads to crop yield reduction in Northeast of *** interaction mechanism of driveragricultural machinery-black soil is not clear.A comprehensive field experiment of 4 hm2 of maize seeding was carried out in Baiquan County *** results showed that the average increase rates of soil compaction before and after sowing were 118.82%and 71.02%.The SEM showed that waist fatigue had the greatest impact on soil compaction,and the unit fatigue of waist caused 1.51 and 1.27 unit compactions to the soil at the depths of 10 cm and 20 *** neck,waist,arm and leg fatigue of drivers increased the surface soil compaction by 1.83,1.76,1.78 and 1.55 units,and the deep soil compaction by 1.65,1.58,1.60 and 1.40 *** results can provide a reference for the integration of human factor efficiency and conservation tillage.

关键词： agriculture ergonomics driver-machine-soil system black soil compaction sowing structural equation model

Enhanced electrical performance in CaBi_(4)Ti_(4)O_(15)ceramics through synergistic chemical doping and texture engineering

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Journal of Materiomics 2024年第2期10卷 471-479页

作者： Le Zhao Guohao Li Xiao zhai weijie Kuai Yuzhi zhai Gang Tian Zhigang Gai Minglei Zhao Juan Du Hongjun Zhang Limei Zheng School of Information and Automation Engineering Qilu University of Technology(Shandong Academy of Sciences)Jinan250353China School of Physics State Key Laboratory of Crystal MaterialsShandong UniversityJinan250100China Center for Optics Research and Engineering(CORE) Key Laboratory of Laser and Infrared System of Ministry of EducationShandong UniversityQingdaoShandong266237China College of Materials Science and Engineering Liaocheng UniversityLiaocheng252059China Functional Materials and Acoustooptic Instruments Institute School of Instrumentation Science and EngineeringHarbin Institute of TechnologyHarbin150080China

High-temperature piezoelectric materials with excellent piezoelectricity,low dielectric loss and large resistivity are highly desired for many industrial sectors such as aerospace,aircraft and nuclear *** a synergistic design strategy combining microstructural texture and chemical doping is employed to optimize CaBi 4Ti 4O15(CBT)ceramics with bismuth layer *** textured microstructure with an orientation factor of 80%e82%has been successfully achieved by the spark plasma sintering ***,by doping MnO_(2),both advantages of hard doping and sintering aids are used to obtain the excellent electrical performance of d_(33)=27.3 pC/N,tandδ-0.1%,Q_(31)~2,307 and electrical re-sistivityρ~6.5×10^(10)Ω·*** to 600℃,the 0.2%(in mass)Mn doped CBT ceramics still exhibit high performance of d_(33)=26.4 pC/N,r~1.5×10^(6)Ω·cm and tandδ~15.8%,keeping at an applicable level,thus the upper-temperature limit for practical application of the CBT ceramics is greatly *** work paves a new way for developing and fabricating excellent high-temperature piezoelectric materials.

关键词： CaBi_(4)Ti_(4)O_(15) Piezoelectricity Mechanical quality factor Resistivity

不同类型农膜使用对温室土壤养分和辣椒产量的影响

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中国农学通报 2024年第21期40卷 61-68页

作者：周天美陆静李梦琳翟维杰施林林陆长婴董林林国家土壤质量相城观测实验站江苏苏州215155 太仓市农业技术推广中心江苏太仓215400 太仓市新湖惠民蔬菜专业合作社江苏太仓215400 苏州市农业科学院江苏苏州215105

为了研究温室大棚内不同类型农膜使用的残留状况,并分析使用不同类型的农膜对土壤养分和辣椒产量的影响,本研究设不覆膜处理为对照(P_(1)),覆0.01 mm黑色PE膜(P_(2))、0.006 mm黑色PBAT膜(P_(3))、0.008 mm黑色PBAT膜(P_(4))、0.01 mm黑... 详细信息

为了研究温室大棚内不同类型农膜使用的残留状况,并分析使用不同类型的农膜对土壤养分和辣椒产量的影响,本研究设不覆膜处理为对照(P_(1)),覆0.01 mm黑色PE膜(P_(2))、0.006 mm黑色PBAT膜(P_(3))、0.008 mm黑色PBAT膜(P_(4))、0.01 mm黑色PBAT65%+PPC35%膜(P_(5))和0.01 mm白色PBAT65%+PPC35%膜(P6)等6个处理分析辣椒产量、农膜残留量和土壤养分。结果表明:使用不同类型的农膜都能够增加辣椒产量,改善土壤水分条件,农膜的残留量及其对土壤养分的影响因农膜类型的不同存在差异。与不覆膜处理相比,所有覆膜处理的土壤速效钾含量均增加;P_(2)、P_(3)和P_(4)处理的土壤速效磷增加,P_(5)和P6处理的速效磷含量降低;使用不同类型的农覆处理均能增加辣椒产量和植株鲜重,使用0.006 mm黑色PBAT膜的效果最显著;0.01 mm白色PBAT65%+PPC35%膜的残留量最大,0.01 mm黑色PE膜的降解量最多,降解率也最高。主成分分析结果表明,农膜降解率、铵态氮和速效磷是影响辣椒产量最主要的因素。综合而言,温室大棚内使用0.006 mm黑色PBAT膜更有利于增加辣椒产量和土壤养分含量,是温室大棚蔬菜生产的可选材料。

关键词：可生物降解膜土壤养分降解率产量

PBAT/PPC可降解地膜在豇豆生产中的应用研究

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中国农学通报 2022年第36期38卷 62-66页

作者：周天美周新伟陆静李梦琳翟维杰董林林陆长婴施林林国家土壤质量相城观测实验站江苏苏州215155 太仓市农业技术推广中心江苏太仓215400 江苏太湖地区农业科学研究所江苏苏州215155 太仓市新湖惠民蔬菜专业合作社江苏太仓215400

PBAT与PPC是化学合成型全生物可降解材料,也是目前地膜可降解材料的研究热点,本研究重点探讨PBAT和PPC材料可降解地膜的实际使用效果。设置PBAT-PPC地膜、PBAT-PPC-BioM地膜、传统PE地膜和露地对照NoFilm处理。通过田间试验,探讨不同地... 详细信息

PBAT与PPC是化学合成型全生物可降解材料,也是目前地膜可降解材料的研究热点,本研究重点探讨PBAT和PPC材料可降解地膜的实际使用效果。设置PBAT-PPC地膜、PBAT-PPC-BioM地膜、传统PE地膜和露地对照NoFilm处理。通过田间试验,探讨不同地膜处理对地表温度、杂草和豇豆产量的影响,并评估地膜降解性能和最终经济效益。结果表明:PBAT-PPC地膜可有效提高5—7月份地表温度0.9ºC,降低7—8月份地表温度0.2~1.6ºC。PBAT-PPC地膜与PBAT-PPC-BioM地膜均能显著提高了豇豆产量,分别较不覆膜对照处理产量提高37%和22%。PBAT-PPC地膜与PE地膜的杂草产量无显著差异,较露地杂草降低45%。试验期内,可降解地膜降解等级达到4~5,满足后期翻耕回田要求。效益分析表明,尽管可降解地膜成本较高,但增产效果显著,整体收益高于无地膜对照,且无环境风险。综上所述,基于PBAT和PPC的可降解地膜性能优异,在豇豆生产中增效明显,具有较高的推广价值。

关键词：聚己二酸/对苯二甲酸丁二酯聚甲基乙撑碳酸酯地膜可降解豇豆