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Nano Research 2024年第5期17卷 4244-4258页

作者： yifeng nie Dong Han Xiang Li CAS Center for Excellence in Nanoscience National Center for Nanoscience and TechnologyBeijing 100190China School of Future Technology University of Chinese Academy of SciencesBeijing 100049China

With the advent of tissue engineering and biomedicine,the creation of extracellular matrix(ECM)biomaterials for in vitro applications has become a prominent and promising *** ECM materials provide physical,biochemical,and mechanical properties that guide cellular behaviors,such as proliferation,differentiation,migration,and *** micro-and nano-patterned materials have a unique surface topology and low energy replication process that directly affect cellular biological behaviors at the interface,the fabrication of micro-nano pattern biomaterials and the regulation of surface physical and chemical properties are of great significance in the fields of cell regulation,tissue engineering,and regenerative ***,we provide a comprehensive review of the progress in the fabrication and application of patterned materials based on the coupling of mechanical action at the micro-and nano-meter scale,including photolithography,micro-contact printing,electron beam lithography,electrospinning,and 3D printing ***,a summary of the fabrication process,underlying principles,as well as the advantages and disadvantages of various technologies are *** also discuss the influence of material properties on the fabrication of micro-and nano-patterns.

关键词： micro/nano hybrid materials patterning fabrication techniques extracellular matrix substrate-cell interaction biomedical engineering

中职汽修专业1+X证书与现代学徒制的融合研究

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时代汽车 2022年第4期 94-95页

作者：聂义风集安市职业教育中心吉林省通化市134200

本文为探讨中职汽修专业1+X证书与现代学徒制的融合效果,以教育部现代学徒制试点工作方案为基础,推出了校企互聘互用、专兼结合的汽修教师人才引入机制,完善学徒培养的标准、管理制度与教学文件等内容,旨在建立以校企育人、联合培养及... 详细信息

本文为探讨中职汽修专业1+X证书与现代学徒制的融合效果,以教育部现代学徒制试点工作方案为基础,推出了校企互聘互用、专兼结合的汽修教师人才引入机制,完善学徒培养的标准、管理制度与教学文件等内容,旨在建立以校企育人、联合培养及校企联合招生的人才培养制度,旨在提升汽修专业毕业生职业技能水平。为验证中职汽修专业1+X证书与现代学徒制的融合价值,特选取该校中职汽修专业二年级学生共100名开展本研究,旨在为教育教学提供参考。

关键词：中职汽修专业 1+X证书现代学徒制融合实践

Dynamic ageing research of cross‐linked polyethylene cable insulation based on temporal‐spatial dimension under combined electro‐thermal effect

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High Voltage 2023年第5期8卷 1067-1081页

作者： yifeng Zhao Yue Xie Yu Zhao Jiasheng Huang Xinghui Fan Yangyang nie Gang Liu School of Electric Power Engineering South China University of TechnologyGuangzhouChina School of Automation Guangdong Polytechnic Normal UniversityGuangzhouChina State Key Laboratory of Nuclear Power Safety Monitoring Technology and Equipment ShenzhenChina Transmission Management Office Guangzhou Power Supply BureauGuangzhouChina

Dynamic ageing process of cross‐linked polyethylene(XLPE)cable insulation under combined electro‐thermal effect is investigated by the construction of theoretical analysis model and the practice of operation‐simulated ageing ***,theoretical analysis model is constructed from time and spatial *** the time dimension,in the light of the impeding trend of internal stress to external stress,the XLPE ageing process of Steady state‐Transition state‐Steady state(STS)is proposed to illustrate the dynamic ageing process of *** the spatial dimension,the insulation is divided into three scales to quantify the ***,to practice the theoretical analysis model,an operation‐simulated ageing test was conducted on two high voltage alternating current cables with service years of 15 and 30 for 540 ***,relevant diagnostic measurements were applied to analyse the influence of physicochemical characteristics on the dielectric and heat transfer performances of the *** results show that the degradation of the actual operating cable is an extremely slow *** the one hand,the response in physical changes of morphology counterbalances the external stress,maintaining the *** the other hand,once the chemical changes occur,negative feedback mechanism tends to impede the occurrence of further degradation by regulating fields distribution.

关键词： dimension insulation effect

不同施氮措施对枸杞园土壤NH_(3)挥发和N_(2)O排放的影响

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农业环境科学学报 2022年第1期41卷 210-220页

作者：卢九斤聂易丰魏娇娇盛海彦华明秀许米聪王永亮青海大学农牧学院西宁810016 省部共建三江源生态与高原农牧业国家重点实验室西宁810016 青海诺木洪农场青海都兰816100

为明确适宜氮肥用量配施硝化抑制剂对柴达木枸杞园土壤NH_(3)挥发和N_(2)O排放的影响,在柴达木地区枸杞园开展研究,共设置9个处理:N667、N534、N400、N267、N133、N0处理分别表示施用纯氮667、534、400、267、133、0 kg·hm^(-2),N400I2... 详细信息

为明确适宜氮肥用量配施硝化抑制剂对柴达木枸杞园土壤NH_(3)挥发和N_(2)O排放的影响,在柴达木地区枸杞园开展研究,共设置9个处理:N667、N534、N400、N267、N133、N0处理分别表示施用纯氮667、534、400、267、133、0 kg·hm^(-2),N400I2.00、N267I1.33、N133I0.67处理分别表示在N400、N267、N133处理基础上配施2-氯-6(三氯甲基)-吡啶(nitrapyrin)2.00、1.33、0.67 kg·hm^(-2),采用通气法和静态暗箱法采集NH_(3)和NO_(2),连续流动分析仪和气相色谱仪测定气体含量。结果表明:NH_(3)挥发速率与累积量均随施氮量的增加而增加,相同施氮量下配施硝化抑制剂对NH_(3)挥发无显著影响。N667处理2019年及2020年的NH_(3)挥发速率峰值分别为0.48 kg·hm^(-2)·d^(-1)和0.57 kg·hm^(-2)·d^(-1),NH_(3)挥发累积量分别为34.49 kg·hm^(-2)和35.11 kg·hm^(-2),显著高于其他处理。两年相同施氮量处理下配施与未配施硝化抑制剂处理的NH_(3)挥发累积量均无显著差异;N400I2.00、N267I1.33、N133I0.67处理较农民习惯施氮(N667)处理显著降低了N_(2)O排放。2019年和2020年N667处理的N_(2)O累积排放量较N400处理分别增加了43.10%、16.11%,N400I2.00、N267I1.33、N133I0.67处理的N_(2)O累积排放量较N400、N267、N133处理降低了28.52%~41.37%。2019年和2020年N400I2.00处理的产量较N667处理显著提高了9.26%及6.67%,且净收益提高了9.80%、7.10%。研究表明,与农民习惯施氮量相比,减施氮肥且配施硝化抑制剂可显著降低NH_(3)挥发和N_(2)O排放,同时可提高枸杞产量与经济效益。施氮量为400 kg·hm^(-2)且配施nitrapyrin 2.00 kg·hm^(-2)为柴达木高肥力枸杞园较优的施氮组合。

关键词：枸杞施氮量 2-氯-6(三氯甲基)-吡啶 NH_(3)挥发 N_(2)O排放产量

Systematic study on size and temporal dependence of micro-LED arrays for display applications

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Photonics Research 2023年第4期11卷 549-557页

作者： JUNYANG nie ZHI ZHANG KONGJIE CHEN yifeng LIU SHUANG HE ZHONGHANG HUANG XIAONING ZHANG JIE SUN FAN ZHANG YONGSHENG WU QUN YAN Faculty of Electronic and Information Engineering Xi’an Jiaotong UniversityXi’an 710049China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China and National and Local United Engineering Laboratory of Flat Panel Display TechnologyCollege of Physics and Information EngineeringFuzhou UniversityFuzhou 350100China Quantum Device Physics Laboratory Department of Microscience and NanotechnologyChalmers University of TechnologyGöteborg 41296Sweden Fujian Prima Optoelectronics Company Ltd. Fuzhou 350000China Rich Sense Electronics Technology Inc. Jinjiang 362200China

Micro-LEDs are one of the most promising candidates for next-generation displays,yet they are inconvenienced by the efficiency reduction induced by the sidewall defects when pursuing further scaled-down device *** have systematically investigated both the size and temporal dependence of ***-LED arrays with a mesa size ranging from 7 to 100μm were prepared for display *** luminance and external quantum efficiency(EQE)were measured and ***,micro-LED arrays with a smaller mesa size exhibit a higher EQE under 100 ns pulse duration operation when compared with longer pulse duration *** certain short-pulsed excitation,a 7×7μm^(2)micro-LED array even exhibits a>20%higher EQE as compared to the direct current(DC)or the long duration pulse operation *** thus concluded that the notorious efficiency reduction induced by sidewall defects in small-sized micro-LED arrays could be significantly reduced by applying short-pulse voltages.

关键词： arrays pulse size

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氮肥用量和配施硝化抑制剂对柴达木枸杞产量及氮素吸收利用的影响

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西北农业学报 2023年第7期32卷 1058-1067页

作者：卢九斤盛海彦华明秀聂易丰高亚军许米聪魏娇娇青海大学农牧学院西宁810016 金华市农业技术推广与种子管理中心浙江金华321000 青海大学省部共建三江源生态与高原农牧业国家重点实验室西宁810016 西北农林科技大学资源环境学院陕西杨凌712100

研究氮肥用量和硝化抑制剂对枸杞产量和氮素平衡等的影响,以期为柴达木地区枸杞科学施氮提供依据。设置8个处理,N_(667)、N_(400)、N_(267)、N_(133)、CK处理分别施用纯氮667(当地农民习惯施氮量)、400、267、133、0 kg/hm^(2),N_(400) ... 详细信息

研究氮肥用量和硝化抑制剂对枸杞产量和氮素平衡等的影响,以期为柴达木地区枸杞科学施氮提供依据。设置8个处理,N_(667)、N_(400)、N_(267)、N_(133)、CK处理分别施用纯氮667(当地农民习惯施氮量)、400、267、133、0 kg/hm^(2),N_(400) I_(2.00)、N_(267) I_(1.33)、N_(133) I_(0.67)处理分别施用纯氮400、267、133 kg/hm^(2)并配施纯氮量0.5%的2-氯-6-三氯甲基吡啶(硝化抑制剂)2.00、1.33、0.67 kg/hm^(2),测定枸杞产量、植株吸氮量和土壤无机氮累积量等指标。结果表明:枸杞产量随施氮量的增加呈先增加后降低的趋势,配施硝化抑制剂可有效提高枸杞产量。2019年N_(400) I_(2.00)、N_(267) I_(1.33)处理的枸杞产量较N_(400)、N_(267)处理分别增加5.8%、5.0%。两年N_(400) I_(2.00)处理的枸杞产量较N_(667)处理分别增加9.3%和6.7%。枸杞的氮肥偏生产力随施氮量的增加而降低。N_(400) I_(2.00)~N_(133) I 0.67处理的氮肥偏生产力较N_(667)处理增加8.9~45.1 kg/kg。与农民习惯施氮处理相比,减施氮肥及配施硝化抑制剂显著提高植株及果实吸氮量。N_(400) I_(2.00)处理的植株吸氮量及果实吸氮量最高,较N_(667)处理提高18.5%及12.8%。同等施氮量下硝化抑制剂的施用降低氮素表观损失量。N_(400) I_(2.00)~N_(267) I_(1.33)处理的表观损失量较N_(400)~N_(267)处理降低30.7~44.4 kg/hm^(2)。在农民习惯施氮量的基础上减少40%~60%施氮量可保证较高的枸杞产量及植株氮素吸收量。相同施氮量配施硝化抑制剂可显著提高枸杞植株吸氮量,降低氮素表观损失量。在本试验条件下,以施氮量267~400 kg/hm^(2)同时配施1.33~2.00 kg/hm^(2)的2-氯-6-三氯甲基吡啶为青海省柴达木地区枸杞生产的适宜施氮组合。

关键词：枸杞氮肥用量 2-氯-6-三氯甲基吡啶产量氮素平衡

磷肥用量对柴达木枸杞磷累积量及土壤有效磷含量的影响

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西北农业学报 2022年第4期31卷 457-467页

作者：卢九斤华明秀盛海彦许米聪聂易丰王永亮索南加于嘉文青海大学农牧学院西宁810016 省部共建三江源生态与高原农牧业国家重点实验室西宁810016 青海诺木洪农场青海都兰816100

为探究施磷量对枸杞产量、磷素吸收量及土壤磷盈亏状况等的影响,于2019─2020年在青海诺木洪农场进行田间试验,设置施磷(P_(2)O_(5))0 kg/hm^(2)(P_(0))、133 kg/hm^(2)(P_(133))、267 kg/hm^(2)(P_(267))、400 kg/hm^(2)(P 400)、534 kg/hm^(2)(P_(534))和农民习惯施磷量667 kg/hm^(2)(P_(667))处理,计算土壤有效磷累积量、植株磷素累积量和当季土壤表观磷盈亏。结果表明,枸杞产量随施磷量的增加呈先增加后降低的趋势,P_(534)处理枸杞产量最高,2019年和2020年较对照(P_(0))处理分别增加34.7%、38.2%。两年P_(534)处理的净收益最高,分别为143315元/hm^(2)、162795元/hm^(2),较P 667处理增加12.5%、3.6%。施磷显著提高植株磷素累积量。2020年P_(534)处理的植株磷素累积量最高,分别较P_(0)、P_(667)处理提高69.7%、7.0%。土壤有效磷含量的变化主要集中于0~60 cm土层,且土壤有效磷累积量随施磷量增加而增加。2019年和2020年施磷133 kg/hm^(2)土壤磷素为亏缺状态,施磷267~667 kg/hm^(2)土壤磷素均为盈余状态。P_(534)处理2 a的土壤表观磷年盈余分别为135.1 kg/hm^(2)、87.0 kg/hm^(2),较P_(667)处理分别降低31.0%、43.8%。当季土壤表观磷盈亏与施磷量呈极显著正相关(P<0.01),施磷量每增加100 kg/hm^(2),土壤表观磷年盈余分别提高41.6 kg/hm^(2)、35.6 kg/hm^(2)。回归分析结果表明2 a施磷量分别为198.3 kg/hm^(2)、245.7 kg/hm^(2)时,土壤磷素盈亏可达到平衡状态。综合考虑,推荐柴达木地区中高肥力枸杞园磷肥(P_(2)O_(5))用量为534 kg/hm^(2)。

关键词：枸杞产量植株磷素累积量土壤有效磷当季土壤表观磷盈亏

Exploring the heavy air pollution in Beijing in the fourth quarter of 2015： assessment of environmental benefits for red alerts

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Frontiers of Earth Science 2018年第2期12卷 361-372页

作者： Teng nie Lei nie Zhen ZHOU Zhanshan WANG yifeng XUE Jiajia GAO Xiaoqing WU Shoubin FAN Linglong CHENG National Engineering Research Center of Urban Environmental Pollution Control Beijing Municipal Research Institute of Environmental Protection Beijing 100037 China Beijing Municipal Environmental Monitoring Center Beijing 100048 China Department of Air Pollution Control Beijing Municipal Institute of Labour Protection Beijing 100054 China

In recent years, Beijing has experienced severeair pollution which has caused widespread public *** to the same period in 2014, the first threequarters of 2015 exhibited significantly improved airquality. However, the air quality sharply declined in thefourth quarter of 2015, especially in November andDecember. During that time, Beijing issued the first redalert for severe air pollution in history. In total, 2 red alerts,3 orange alerts, 3 yellow alerts, and 3 blue alerts wereissued based on the adoption of relatively temporaryemergency control measures to mitigate air pollution. Thisstudy explored the reasons for these variations in airquality and assessed the effectiveness of emergency alertsin addressing severe air pollution. A synthetic analysis ofemission variations and meteorological conditions wasperformed to better understand these extreme air pollutionepisodes in the fourth quarter of 2015. The results showedthat compared to those in the same period in 2014, thedaily average emissions of air pollutants decreased in thefourth quarter of 2015. However, the emission levels ofprimary pollutants were still relatively high, which was themain intrinsic cause of haze episodes, and unfavorablemeteorological conditions represented important externalfactors. Emergency control measures for heavy airpollution were implemented during this red alert period,decreasing the emissions of primary air pollutants byapproximately 36% and the PMa.5 concentration by 11%-21%.

关键词： heavy air pollution red alert emissions

Multi-dimension apportionment of clean air “parade blue”phenomenon in Beijing

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Journal of Environmental Sciences 2018年第3期30卷 29-42页

作者： yifeng Xue Yong Wang Xuefeng Li Hezhong Tian Lei nie Xiaoqing Wu Junrui Zhou Zhen Zhou State Key Joint Laboratory of Environmental Simulation & Pollution Control School of Environment Beijing Normal University Beijing 100875 China National Engineering Research Center of Urban Environmental Pollution Control Beijing Municipal Research Institute of Environmental Protection Beijing 100037 China Center of Atmospheric Environmental Studies Beijing Normal University Beijing 100875 China Wuhan Environmental Protection Sciences Research Institute Wuhan 430015 China

The mass concentration and major chemical components of fine particulate matter were measured before,during and after Beijing＇s massive parade commemorating 70th anniversary of the Chinese Victory in World War II on September 3,*** emission inventory,positive matrix factorization（PMF）,observations from space and backward air mass trajectories were jointly applied to identify the major pollution sources and their temporal and spatial *** contributions of emissions variations and the meteorological conditions related to the＂parade blue＂phenomenon in Beijing and its surrounding areas were investigated in *** main cause of the decreased PM（2.5）mass concentration was attributed to the absolute reduction in emissions of primary air *** chemical composition of PM（2.5）varied significantly before,during and after the *** dust particles were well controlled,the secondary formation of PM（2.5）was reduced along with the controlled gaseous precursors＇emissions from vehicles and industrial sources during the temporary intensified control *** the parade period,the SO2and NO2column concentrations in Beijing and the surrounding areas decreased sharply,indicating that the coordinated reduction in primary emissions from the surrounding areas of Beijing played an important role in lowering the ambient concentration of SO2and NO2and accordingly lowered PM（2.5）and improved the regional air quality.A comparison of the temperature,humidity,and wind speed and direction during the same periods in 2014 and 2015 showed that the meteorological conditions positively influenced the achievement of＂parade blue＂.

关键词： PM2.5 Parade Blue in Beijing Emission reduction Air quality Source apportionment Meteorological conditions

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不同施肥处理枸杞园氨挥发损失及其影响因素研究

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青海大学学报 2021年第1期39卷 44-51页

作者：张莹卢九斤华明秀魏娇娇聂易丰谢守忠盛海彦青海大学青海西宁810016 青海省诺木洪农场青海都兰816100

为探究不同施肥处理对柴达木地区枸杞园土壤氨挥发的影响,选取10年生宁杞1号为研究对象,在枸杞一个生长季,设置10个处理,除不施肥的CK处理外,其他处理施用相同的商品有机肥和重过磷酸钙,N_(667)~N_(0)处理依次施氮667、534、400、267、... 详细信息

为探究不同施肥处理对柴达木地区枸杞园土壤氨挥发的影响,选取10年生宁杞1号为研究对象,在枸杞一个生长季,设置10个处理,除不施肥的CK处理外,其他处理施用相同的商品有机肥和重过磷酸钙,N_(667)~N_(0)处理依次施氮667、534、400、267、133、0 kg/hm^(2),N_(400) NI_(2.00)、N_(267) NI_(1.34)、N_(133) NI_(0.67)处理在N_(400)、N_(267)、N_(133)的基础上配施纯氮0.5%的硝化抑制剂(Nitrapyrin)。结果表明:两次施肥后氨挥发速率均有所升高,随后下降并趋于平缓;氨挥发累积量随施氮量的增加而升高。在枸杞的一个生长季,N_(667)处理的氨挥发累积量最高为0.3449 kg/hm^(2),N_(400) NI_(2.00)与N_(400)、N_(267) NI_(1.34)与N_(267)、N_(133) NI_(0.67)与N_(133)处理的氨挥发累积量无显著差异;N_(400) NI_(2.00)处理的产量最高,为7867 kg/hm^(2),较N 667、N_(400)处理分别增加9.26%、5.78%,且氨挥发净损失率最小;在施基肥后的30 d和80 d,0~20 cm及20~40 cm土层中施氮处理铵态氮累积量均高于不施氮处理,且施用Nitrapyrin的N_(400)NI_(2.00)~N_(133)NI_(0.67)处理的铵态氮累积量显著高于不施用Nitrapyrin的N_(400)~N_(133)处理(P<0.05)。因此,柴达木枸杞园适宜枸杞施肥方案为267~400 kg/hm^(2)施氮量,且配施1.34~2.00 kg/hm^(2) Nitrapyrin可兼顾经济和生态效益。

关键词：枸杞施氮量氨挥发 Nitrapyrin 柴达木地区

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