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International Journal of Minerals,Metallurgy and Materials 2016年第9期23卷 1019-1028页

作者： Lei Guo Jin-tao gao Yi-wei Zhong han gao Zhan-cheng Guo State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing

Experiments on the solid-state reaction between iron ore particles and MgO were performed to investigate the coating mechanism of MgO on the iron ore particles＇ surface during fluidized bed reduction. MgO powders and iron ore particles were mixed and compressed into briquettes and, subsequently, roasted at different temperatures and for different time periods. A Mg-containing layer was observed on the outer edge of the iron ore particles when the roasting temperature was greater than 1173 K. The concentration of Fe in the Mg-containing layer was evenly distributed and was approximately 10wt%, regardless of the temperature change. Boundary layers of Mg and Fe were observed outside of the iron ore particles. The change in concentration of Fe in the boundary layers was simulated using a gas–solid diffusion model, and the diffusion coefficients of Fe and Mg in these layers at different temperatures were calculated. The diffusion activation energies of Fe and Mg in the boundary layers in these experiments were evaluated to be approximately 176 and 172 k J/mol, respectively.

关键词： fluidized beds coating solid reaction ferric oxide magnesia diffusion coefficient

Phenylfluorenamine-functionalized poly(N-vinylcarbazole)s as dopant-free polymer hole-transporting materials for inverted quasi-2D perovskite solar cells

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Journal of Energy Chemistry 2022年第6期31卷 123-131,I0004页

作者： Zhengwu Pan han gao Yingying Yang Qin Zou Darui Peng Pinghui Yang Jiangli Cai Jin Qian Jiewei Li Chengrong Yin Nana Wang Renzhi Li Jianpu Wang Wei Huang These authors contributed equally to this work.a.Key Laboratory of Flexible Electronics(KLOFE)&Institute of Advanced Materials(IAM) Jiangsu National Synergistic Innovation Center for Advanced Materials(SICAM)Nanjing Tech University(NanjingTech)Nanjing 211816JiangsuChina Key Laboratory for Organic Electronics and Information Displays&Institute of Advanced Materials(IAM) Nanjing University of Posts&TelecommunicationsNanjing 210023JiangsuChina

In order to improve the efficiency and stability of inverted three-dimensional(3D) or quasi-2D perovskite solar cells(PSCs) for future commercialization, exploring high efficient dopant-free polymer holetransporting materials(HTMs) is still desired and meaningful. One simple and efficient way to achieve high performance dopant-free HTMs is to synthesize novel non-conjugated side-chain polymers via rational molecular design. In this work, N-(4-methoxyphenyl)-9,9-dimethyl-9H-fluoren-2-amine(FMeNPh) groups are introduced into the poly(N-vinylcarbazole)(PVK) side chains to afford two nonconjugated polymers PVCz-DFMeNPh and PVCz-FMeNPh as dopant-free HTMs in inverted quasi-2D PSCs. Benefited from the flexible properties of polyethylene backbone and excellent optoelectronic natures of FMeNPh side-chain groups, PVCz-DFMeNPh with more FMeNPh units exhibited excellent thermal stability, well-matched energy levels and improved charge mobility as compared to PTAA and PVCzFMeNPh. Moreover, the morphologies investigation of quasi-2D perovskite on PVCz-DFMeNPh shows more compact and homogeneous perovskite films than those on PTAA and PVCz-FMeNPh. As a result,the dopant-free PVCz-DFMeNPh based inverted quasi-2D PSCs deliver power conversion efficiency(PCE) up to 18.44% as well as negligible hysteresis and favorable long-term stability, which represents as excellent performance reported to date for inverted quasi-2D PSCs. The results demonstrate the great potentials of constructing non-conjugated side-chain polymer HTMs based on phenylfluorenamine-func tionalized PVK for the development of high efficient and stable inverted 3D or quasi-2D PSCs.

关键词： Phenylfluorenamine Non-conjugated polymers Dopant-free Hole-transporting materials Quasi-2D perovskite solar cells

乡村全科执业助理医师资格考试大纲的分析与思考:基于中国乡村全科执业助理医师岗位胜任力指标体系

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中华全科医师杂志 2024年第3期23卷 215-219页

作者：高晗于晓松中国医科大学附属第一医院全科医学科沈阳110001

笔者基于中国乡村全科执业助理医师岗位胜任力指标体系对乡村全科执业助理医师考试大纲进行了分析,发现现行考试大纲与指标体系的框架基本一致,但在具体考核内容和形式上可进一步优化。笔者认为应进一步强化对全科医学基本知识和医学知... 详细信息

笔者基于中国乡村全科执业助理医师岗位胜任力指标体系对乡村全科执业助理医师考试大纲进行了分析,发现现行考试大纲与指标体系的框架基本一致,但在具体考核内容和形式上可进一步优化。笔者认为应进一步强化对全科医学基本知识和医学知识实际应用能力的考核,并需优化沟通能力与职业素养的考核形式。

关键词：胜任力乡村全科执业助理医师考试大纲

Enhancement of morphological and emission stability of deep-blue small molecular emitter via a universal side-chain coupling strategy for optoelectronic device

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Chinese Chemical Letters 2022年第2期33卷 835-841页

作者： Ning Sun han gao Lili Sun Jingxi An Man Xu Chen Sun Yamin han Jinyi Lin Jiangli Cai Mingjian Ni Liangliang He Jinghao Yang Zhoulu Wang Lubing Bai Xinwen Zhang Qi Wei Xuehua Ding Chengrong Yin Linghai Xie Wei Huang Key Laboratory of Flexible Electronics(KLOFE)and Institute of Advanced Materials(IAM) Nanjing Tech University(NanjingTech)Nanjing 210000China State Key Laboratory of Organic Electronics and Information Displays and Institute of Advanced Materials(IAM) Nanjing University of Posts and TelecommunicationsNanjing 210023China Frontiers Science Center for Flexible Electronics(FSCFE) MIIT Key Laboratory of Flexible Electronics(KLoFE)Northwestern Polytechnical UniversityXi’an 710072China

Film morphology of emissive layers is crucial to the performance and stability of solution-processable organic light-emitting diodes(OLEDs). Compared to the interpenetration of conjugated polymer chain,small molecular emitter with a flexible side chain always presents easily aggregation upon external treatment, and caused π-electronic coupling, which is undesirable for the efficiency and stability of deep-blue OLEDs. Herein, we proposed a side-chain coupling strategy to enhance the film morphological an emission stability of solution-processable small molecular deep-blue emitter. In contrary to “parent” MC8 TPA,the crosslinkable styryl and vinyl units were introduced as ended unit at the side-chain of Cm TPA and OEYTPA. Interestingly, Cm TPA and OEYTPA films present a relatively stable morphology and uniform deep-blue emission after thermal annealing(160 ℃) in the atmosphere, different to the discontinuous MC8 TPA annealed film. Besides, compared to the Cm TPA and OEYTPA ones, serious polaron formation in the MC8 TPA annealed film also negative to the deep-blue emission, according to transient absorption analysis. Therefore, both Cm TPA and OEYTPA annealed film obtained at 140 ℃ present an excellent deep-blue ASE behavior with a 445 nm, but absence for MC8 TPA ones, associated with the disruption of annealed films. Finally, enhancement of device performance based on Cm TPA and OEYTPA film(~40%)after thermal annealing with a similar performance curves also confirmed the assumption above. Therefore, these results also supported the effectiveness of our side-chain coupling strategy for optoelectronic applications.

关键词： Side-chain coupling Small molecular emitter Morphological stability Deep-blue emission Optoelectronic device

基于钻石模型的县域特色产业集群竞争力构建——以保定市高阳县为例

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保定学院学报 2024年第2期37卷 129-136页

作者：高涵河北经贸大学工商管理学院河北石家庄050061

县域经济作为国民经济的基本单元,支撑其发展的特色产业集群竞争力的构建是关键。从国家竞争优势理论出发,重构以竞争力为核心的“县域钻石模型”,并构建县域特色产业集群竞争力定性评价指标体系,采用定性文本分析的方式解读改革开放以... 详细信息

县域经济作为国民经济的基本单元,支撑其发展的特色产业集群竞争力的构建是关键。从国家竞争优势理论出发,重构以竞争力为核心的“县域钻石模型”,并构建县域特色产业集群竞争力定性评价指标体系,采用定性文本分析的方式解读改革开放以来高阳县纺织产业集群的发展历程。验证了以生产要素、需求条件、产业集群创新生态系统和政府有为4个关键因素以及市场环境和知识产权保护2个营商环境为辅助因素的“县域钻石模型”的适用性,为高阳县域经济发展提供参考。

关键词：钻石模型县域产业集群纺织业高阳县

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桥墩受侧向撞击作用下静力简化分析方法

东南大学学报（自然科学版） 2024年第1期54卷 117-125页

作者：方海高涵祝露贾恩实陈志跃南京工业大学土木工程学院南京211816 中铁大桥勘测设计院集团有限公司武汉430056

为了深入探究钢筋混凝土桥墩受侧向撞击时的静力简化方法,基于桥墩受撞击作用与静力作用下产生的侧向变形效应相等,建立了桥墩弯曲应变能和剪切应变能的计算公式.针对不同截面形式和不同约束条件下的桥墩模型,分别得出了桥墩在正弦、三... 详细信息

为了深入探究钢筋混凝土桥墩受侧向撞击时的静力简化方法,基于桥墩受撞击作用与静力作用下产生的侧向变形效应相等,建立了桥墩弯曲应变能和剪切应变能的计算公式.针对不同截面形式和不同约束条件下的桥墩模型,分别得出了桥墩在正弦、三角形和矩形撞击荷载波形作用下的等效撞击力简化公式,并分析了撞击力峰值和等效值之间的关系.结果表明:当矩形截面桥墩撞击点距墩底距离与截面长度的比值小于3.7,或圆形截面桥墩撞击点距墩底距离与截面半径的比值小于6.2时,需充分考虑桥墩剪切应变能的影响;荷载波形对等效撞击力取值影响较大,当撞击荷载波形接近正弦、三角形和矩形波时,等效撞击力系数的建议值分别为0.64、0.52和0.91.研究结果可为桥墩等效撞击力取值提供参考依据.

关键词：桥梁工程静力简化侧向撞击桥墩应变能

Molecular signature of soil organic matter under different land uses in the Lake Chaohu Basin

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Eco-Environment & Health 2022年第4期1卷 212-218页

作者： han gao Huixin Li Chen Lin Pedro J.J.Alvarez Caroline A.Masiello Dongqiang Zhu Ao Kong Xiaolei Qu State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China School of Finance Nanjing University of Finance and EconomicsNanjing 210023China Key Laboratory of Watershed Geographic Sciences Institute of Geography and LimnologyChinese Academy of SciencesNanjing 210008China State Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control Nanjing Institute of Environmental SciencesMinistry of Ecology and Environment of ChinaNanjing 210042China Department of Civil and Environmental Engineering Rice UniversityHouston TX 77005USA Department of Earth Environmental and Planetary SciencesRice UniversityHouston TX 77005USA School of Urban and Environmental Sciences Peking UniversityBeijing 100871China

The concentration and molecular composition of soil organic matter(SOM)are important factors in mitigation against climate change as well as providing other ecosystem services.Our quantitative understanding of how land use influences SOM molecular composition and associated turnover dynamics is limited,which underscores the need for high-throughput analytical approaches and molecular marker signatures to clarify this etiology.Combining a high-throughput untargeted mass spectrometry screening and molecular markers,we show that forest,farmland and urban land uses result in distinct molecular signatures of SOM in the Lake Chaohu Basin.Molecular markers indicate that forest SOM has abundant carbon contents from vegetation and condensed organic carbon,leading to high soil organic carbon(SOC)concentration.Farmland SOM has moderate carbon contents from vegetation,and limited content of condensed organic carbon,with SOC significantly lower than that of forest soils.Urban SOM has high abundance of condensed organic carbon markers due to anthropogenic activities but relatively low in markers from vegetation.Consistently,urban soils have the highest black carbon/SOC ratio among these land uses.Overall,our results suggested that the molecular signature of SOM varies significantly with land use in the Lake Chaohu Basin,influencing carbon dynamics.Our strategy of molecular fingerprinting and marker discovery is expected to enlighten further research on SOM molecular signatures and cycling dynamics.

关键词： High-throughput untargeted mass spectrometry screening Mass spectrum processing algorithm Soil organic matter Molecular signature Land use

基于母线电流重构的空心杯BLDCM无位置传感器换相误差闭环补偿方法

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实验技术与管理 2024年第2期41卷 98-105页

作者：金浩高涵王飞飞高荣科中国石油大学(华东)控制科学与工程学院山东青岛266580

为精确补偿无刷直流电机无位置传感器的换相误差,分析了换相误差与重构母线电流积分的相关性,设计了母线电流重构及滤波电路,得到了双重构母线电流在每个换相周期的积分值,并以电流积分差值作为换相误差表征量建立了闭环补偿控制系统,... 详细信息

为精确补偿无刷直流电机无位置传感器的换相误差,分析了换相误差与重构母线电流积分的相关性,设计了母线电流重构及滤波电路,得到了双重构母线电流在每个换相周期的积分值,并以电流积分差值作为换相误差表征量建立了闭环补偿控制系统,利用控制器输出量补偿换相误差,实现了换相信号相位的高精度闭环校正。相比传统方法,所提出的硬件电路可精确构建母线电流积分,准确表征电机换相误差,提高无刷直流电机的运行效率。最后通过搭建磁悬浮飞轮系统验证了所提方法的有效性。

关键词：无刷直流电机无位置传感器换相换相误差补偿

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机电设备中智能故障检测诊断技术的运用

黑龙江科学 2024年第2期15卷 64-66页

作者：高寒合肥工大共达工程检测试验有限公司合肥230051

以水利工程机电设备智能故障检测诊断技术为研究对象,通过DBN开展机电设备故障识别分类。介绍了DBN结构的运行原理及操作流程,基于水利工程机电设备特点,以KPCA—DBN模型为依托,以实验验证的方式开展水利工程机电设备细化故障诊断计算... 详细信息

以水利工程机电设备智能故障检测诊断技术为研究对象,通过DBN开展机电设备故障识别分类。介绍了DBN结构的运行原理及操作流程,基于水利工程机电设备特点,以KPCA—DBN模型为依托,以实验验证的方式开展水利工程机电设备细化故障诊断计算。基于KPCA—DBN模型数据进行机电设备运维管理,按照科学的运维管理流程强化管理质量。为进一步验证机电设备智能故障监测诊断的可靠性,以水利工程滚动轴承设备智能故障检测诊断为例,获取滚动轴承故障诊断实际应用数据,对故障结果数据进行分析,以提升水利工程机电设备故障的处理效果。

关键词：机电设备智能故障检测诊断技术 DBN结构 KPCA—DBN模型

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基于绿色理念的建筑施工技术研究

工程建设（维泽科技） 2024年第7期7卷 176-179页

作者：高寒河北建设集团股份有限公司河北保定071000

近年来,我国建筑行业得到了迅速的发展,推动了我国的经济健康发展,但同时建筑行业在发展的过程中也存在着一些问题,亟须采取有效措施进行解决。其中,产生的建筑环境污染受到了社会上各界人士的广泛关注。为推动建筑业高质量发展,应该积... 详细信息

近年来,我国建筑行业得到了迅速的发展,推动了我国的经济健康发展,但同时建筑行业在发展的过程中也存在着一些问题,亟须采取有效措施进行解决。其中,产生的建筑环境污染受到了社会上各界人士的广泛关注。为推动建筑业高质量发展,应该积极进行创新研究绿色施工技术以达到节能环保的目的。文中主要对绿色建筑理念的施工技术进行了相应的分析,希望能够采取有效措施,推动我国的绿色建筑施工。

关键词：绿色理念建筑施工施工技术