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Species profile and reactivity of volatile organic compounds emission in solvent uses,industry activities and from vehicular tunnels

第九届新型太阳能材料科学与技术学术研讨会

作者： Zongwen Ma Huaizhi Gao Zhiyang Xu Ruyue Wang zhangwei he Guangzheng Wu Mengyun Zheng Zhanao Tan Beijing Advanced Innovation Center for Soft Matter Science and Engineering State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical Technology

Organic-inorganic halide perovskite solar cell(PerSC) stands for the state-of-the-art emerging photovoltaic technologies. However, the environmental water/moisture and temperature induced intrinsic degradation and phase transition of perovskite greatly retard the commercialization process. herein, a dual-functional organic ligand, 4,7-bis((4-vinylbenzyl)oxy)-1,10-phenanthroline(namely, C1), with the crosslinkable styrene sidechains and chelatable phenanthroline backbone, synthesized via a cost-effective Williamson reaction, is introduced for collaborative electrode interface and perovskite grain boundaries(GBs) engineering. C1 can chemically chelate with Sn in SnO electron transport layer and Pb in perovskite layer via coordination bonds, suppressing nonradiative recombination caused by traps/defects existing at the interface and GBs. Meanwhile, C1 enables in-situ crosslinking via thermal-initiated polymerization to form a hydrophobic and stable polymer network, freezing perovskite morphology and resisting moisture degradation. Consequently, through collaborative interface-grain engineering, the resulting PerSCs demonstrate high power conversion efficiency(PCE) of 24.31% with excellent water/moisture and thermal stability.

关键词： chemical anchoring in-situ crosslinking collaborative interface-grain engineering perovskite solar cell stability

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Journal of Environmental Sciences 2024年第1期135卷 546-559页

作者： Haimei Huang zhangwei Wang Chunhao Dai Hai Wu Jia Guo Chunjie Wang Xiaoshan Zhang State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China Hunan Agricultural University Changsha 430106China National Institute of Metrology Beijing 100029China

A survey was conducted of the volatile organic compounds(VOCs)released from sources of solvent use,industry activities and vehicle emissions in Guiyang,a capital city of China.Samples were collected by canisters and analyzed by GC-MS-FID.The species profiles of VOCs emitted from sources were obtained.Results showed that xylenes,ethylbenzene,acetone and dichloromethane were the characteristics species for painting,2-propanol and ethyl acetate for printing,α-pinene for solid wood furniture manufacturing,and 2-butanone for biscuit baking.These characteristics species could be as tracers for the sources respectively.In most of samples from the solvent use,the benzene/toluene(B/T)ratio was less than 0.3,indicating that the ratio could be as the indicator for tracing the solvent use related sources.The results also suggested that the toluene/xylene(T/X)ratio be as the indicator to distinguish the VOCs sources of painting(he printing(>2).Aromatics contributed the most to ozone formation potential(OFP)of most painting and non-paper printing sources,and oxygen-containing VOCs(OVOCs)were major species contributing to OFP of the sources from food production and paper printing.The OFP of the VOCs emissions from vehicle in tunnels and from other manufactures were dominated by both aromatics and alkenes.Theα-pinene could explain 56.94%and 32.54%of total OFP of the VOCs sources from filing cabinet and solid wood furniture manufacturing,which was rarely been involved in previous studies of VOCs source profiles,indicating that the species of concern for VOCs sources are still insufficient at present.

关键词： Volatile organic compounds(VOCs) Species profile BTEX ratio Source reactivity

Solution-Processable Copper(Ⅰ) Thiocyanate(CuSCN) as Hole Transport Layers for BiI3 Solar Cells

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Solution-Processable Copper(Ⅰ) Thiocyanate(CuSCN) as Hole T...

Distal-scanning common path probe for optical coherence tomography

第七届新型太阳能电池材料科学与技术学术研讨会

作者： zhangwei he Tinglei Zhao Huanyu Ma Zhanao Tan Beijing Advanced Innovation Center for Soft Matter Science and Engineering State Key Laboratory of Organic-Inorganic CompositesBeijing University of Chemical Technology

The solar cells have emerged as a series of star technologies in utilization of renewable energy.However,the issues raised by the short lifetime of the photovoltaics and toxic processing have severely limited their potential applications.In this work,we develop a two-step environmentally friendly solution deposition method to fabricate bismuth triiodide(BiI) solar cells.Using the technique,we harvest large size crystals and obtained uniform morphology of BiI film.In addition,we demonstrate the use of solution-processable copper(I) thiocyanate(CuSCN) as hole transport layers in BiI solar cells.The devices display an overall power conversion efficiency of 0.8% under AM 1.5 G illumination.This work provides new strategies for achieving high-efficiency BiI solar cells.

关键词： bismuth triiodide hole transport layer solution-processable photovoltaics

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Journal of Innovative Optical health Sciences 2024年第3期17卷 84-92页

作者： Zhengyu Chen Bin he Zichen Yin zhangwei Hu Yejiong Shi Chengming Wang Xiao Zhang Ning Zhang Linkai Jing Guihuai Wang Ping Xue State Key Laboratory of Low-dimensional Quantum Physics and Department of Physics Tsinghua UniversityBeijingChina Frontier Science Center for Quantum Information BeijingChina Jinsp Company Limited BeijingChina Beijing Institute of Technology BeijingChina Institute of Forensic Science Ministry of Public Security BeijingChina Department of Neurosurgery Beijing Tsinghua Changgung HospitalSchool of Clinical Medicine and Institute of Precision MedicineTsinghua UniversityBeijingChina

In this paper,we present a distal-scanning common path probe for optical coherence tomography(OCT)equipped with a hollow ultrasonic motor and a simple and specially designed beam-splitter.This novel probe proves to be able to effectively circumvent polarization and dispersion mismatch caused by fiber motion and is more robust to a variety of interfering factors during the imaging process,experimentally compared to a conventional noncommon path probe.Furthermore,our design counteracts the attenuation of backscattering with depth and the fall-off of the signal,resulting in a more balanced signal range and greater imaging depth.Spectral-domain OCT imaging of phantom and biological tissue is also demonstrated with a sensitivity of∼100dB and a lateral resolution of∼3μm.This low-cost probe offers simplified system configuration and excellent robustness,and is therefore particularly suitable for clinical diagnosis as one-off medical apparatus.

关键词： Common path optical coherence tomography endoscopic probe

实现“人机共存”的上层空间紫外辐照系统的应用及研究进展

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中国医疗设备 2024年第2期39卷 22-27页

作者：季耀洲何张卫叶新建罗美林曹承福袁文涵朱凤一俞容文宋承华吴荣谦李虞锋国科温州研究院浙江温州325001 西安交通大学第一附属医院陕西省再生医学与外科工程研究中心陕西西安710061 西安交通大学第一附属医院精准外科与再生医学国家地方联合工程研究中心陕西西安710061 陕西省信息光子重点实验室陕西西安710049

目前预防空气中病原体传播的重要性日益凸显,寻求有效的空气消杀技术变得至关重要。上层空间紫外辐照技术作为一种高效、经济且满足“人机共存”的空气消杀解决方案,已应用于针对预防结核传播中。随着固态紫外光源的发展,新型上层空间... 详细信息

目前预防空气中病原体传播的重要性日益凸显,寻求有效的空气消杀技术变得至关重要。上层空间紫外辐照技术作为一种高效、经济且满足“人机共存”的空气消杀解决方案,已应用于针对预防结核传播中。随着固态紫外光源的发展,新型上层空间紫外辐照系统相较于传统系统,在光源升级、光束整形、结构设计等方面均有提升。光束整形的优化可使紫外线更精准地照射目标区域,提高消毒效果。本文综述了上层紫外线辐照系统的技术原理、研发现状、应用领域,并对未来发展趋势进行了展望。

关键词：上层空间紫外辐照 C波段紫外线人机共存空气消杀

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电力设备状态监测数据融合算法分析

能源与环保 2022年第5期44卷 162-167页

作者：何章玮广东电网公司广东广州516000

为了防止电力系统发生故障,需要大量的传感器来监测电力设备的工作状态。使用线路电缆传输监测数据通常会对传统的线路监测系统造成安装、检查、维护的不便。Leach-E是目前最流行的基于自适应簇的路由算法之一。提出了一种基于Leach-E、... 详细信息

为了防止电力系统发生故障,需要大量的传感器来监测电力设备的工作状态。使用线路电缆传输监测数据通常会对传统的线路监测系统造成安装、检查、维护的不便。Leach-E是目前最流行的基于自适应簇的路由算法之一。提出了一种基于Leach-E、WSNs的电力设备监测系统的新设计,其算法充分考虑了无线传感器网络的大能耗,并结合无线传感器网络的优点,将Leach-E架构应用到WSNs,新的设计可以提高在实践中监测电力设备系统健康状况的灵活性、实时性和可靠性。

关键词：电力设备状态监测数据融合 Leach-E

Variational Mode Decomposition-Informed Empirical Wavelet Transform for Electric Vibrator Noise Analysis

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Journal of Applied Mathematics and Physics 2024年第6期12卷 2320-2332页

作者： Zhenyu Xu zhangwei Chen State Key Lab of Fluid Power and Mechatronic Systems Zhejiang University Hangzhou China

Electric vibrators find wide applications in reliability testing, waveform generation, and vibration simulation, making their noise characteristics a topic of significant interest. While Variational Mode Decomposition (VMD) and Empirical Wavelet Transform (EWT) offer valuable support for studying signal components, they also present certain limitations. This article integrates the strengths of both methods and proposes an enhanced approach that integrates VMD into the frequency band division principle of EWT. Initially, the method decomposes the signal using VMD, determining the mode count based on residuals, and subsequently employs EWT decomposition based on this information. This addresses mode aliasing issues in the original method while capitalizing on VMD’s adaptability. Feasibility was confirmed through simulation signals and ultimately applied to noise signals from vibrators. Experimental results demonstrate that the improved method not only resolves EWT frequency band division challenges but also effectively decomposes signal components compared to the VMD method.

关键词： Electric Vibrator Noise Analysis Signal Decomposing Variational Mode Decomposition Empirical Wavelet Transform

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不同海拔条件下高海拔粳稻产量构成差异分析

中国稻米 2015年第5期21卷 75-78页

作者：何张伟大理州农科院粮作所云南大理671005

对不同海拔条件下高海拔粳稻的产量构成因素进行了比较分析。结果显示,在不同海拔条件下高海拔粳稻产量构成因素的表型及与产量的相关性和通径系数均存在较大差异。在产量构成因素中,结实率(132.39%)、有效穗数(113.78%)对海拔的反应最... 详细信息

对不同海拔条件下高海拔粳稻的产量构成因素进行了比较分析。结果显示,在不同海拔条件下高海拔粳稻产量构成因素的表型及与产量的相关性和通径系数均存在较大差异。在产量构成因素中,结实率(132.39%)、有效穗数(113.78%)对海拔的反应最为敏感,千粒重次之(106.78%),而每穗总粒数(102.29%)则较稳定。造成高海拔粳稻产量下降的主要原因是结实率和有效穗数的下降。因此,可通过选择有效穗数和结实率对海拔反应较为迟钝的品种类型来提高高海拔粳稻的稳产性。

关键词：高海拔粳稻产量构成差异分析

凤凰单丛茶加工过程中挥发性香气成分和生化成分的变化

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食品与机械 2024年第2期40卷 152-160,167页

作者：李张伟韩山师范学院化学与环境工程学院广东潮州521041

目的:优化凤凰单丛茶加工工艺。方法:采用顶空固相微萃取法(HS-SPME)、气相色谱—质谱法(GC-MS)和分光光度计法等对凤凰单丛茶加工过程中不同阶段的茶叶挥发性香气和非挥发性生化成分进行提取、测定及分析。结果:加工过程中,凤凰单丛茶... 详细信息

目的:优化凤凰单丛茶加工工艺。方法:采用顶空固相微萃取法(HS-SPME)、气相色谱—质谱法(GC-MS)和分光光度计法等对凤凰单丛茶加工过程中不同阶段的茶叶挥发性香气和非挥发性生化成分进行提取、测定及分析。结果:加工过程中,凤凰单丛茶的醇类、醛类、酮类和酯类物质含量呈下降趋势,烷烃类和芳香环类物质含量呈上升趋势;非挥发性生化成分中茶多酚、氨基酸、咖啡碱和儿茶素含量逐渐减少;可溶性糖含量和水浸出物含量则逐渐增加。茶叶香气中,吲哚、α-法尼烯、橙花叔醇等含量大幅增加,是凤凰单丛茶茶叶重要的挥发性香气成分。结论:加工过程中,凤凰单丛茶的苦涩味和青草气逐渐减少,花果香味气体逐渐增加,形成了凤凰单丛茶特有的花果香味和香醇口感。

关键词：凤凰单丛茶挥发性香气非挥发性成分加工过程

城市家庭教育环境水平的社会空间分异及其对学习体验的影响——以大连市初中为例

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地理科学 2024年第5期44卷 808-818页

作者：刘天宝祝张威辽宁师范大学海洋可持续发展研究院辽宁大连116029

依托2020年问卷调查数据,利用因子分析等方法解读了义务教育阶段家庭教育环境的社会空间分异及其对家内学习体验的影响。研究发现:①家庭教育环境的不同维度和综合得分均存在多尺度的空间分异,其中家庭之间的分异程度最为显著。②高社... 详细信息

依托2020年问卷调查数据,利用因子分析等方法解读了义务教育阶段家庭教育环境的社会空间分异及其对家内学习体验的影响。研究发现:①家庭教育环境的不同维度和综合得分均存在多尺度的空间分异,其中家庭之间的分异程度最为显著。②高社会经济地位家庭、普通社会经济地位家庭、低收入家庭和低文化家庭分别在不同区位提供了差异明显的家庭教育环境,比较而言,高社会经济地位家庭提供的家庭教育环境更具有优势。③噪音影响程度、父母期望程度、父母为学习同伴、父母有能力帮助解决子女学习上的问题以及家中藏书量等是影响家内学习体验的主要因素。研究对城市家庭教育环境复杂性的解读及相关政策的制定具有积极意义。

关键词：社会经济地位家庭类型尺度因子交互