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Methylthio side-chain modified quinoidal benzo-[1,2-b:4,5-b']dithiophene derivatives for high-performance ambipolar organic field-effect transistors

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Science China Chemistry 2024年第10期67卷 3357-3365页

作者： Li Chen xiaoqi luo Nuoya Li Shaoqian Peng Qing Jiang Di Wu Jianlong Xia State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Center of Smart Materials and DevicesWuhan University of TechnologyWuhan 430070China School of Chemistry Chemical Engineering and Life ScienceWuhan University of TechnologyWuhan 430070China Department of Chemistry National University of SingaporeSingapore 117543Singapore

Quinoidal small molecule semiconductors hold huge potential in ambipolar organic field-effect transistors(OFETs)and organic spintronic ***,two quinoidal molecules with methylthio side chains were synthesized to develop molecular semiconductors with high ambipolar mobility,designated QBDTS and *** theoretical calculation results reveal that QBDTS has a closed-shell structure while QTBDTS showed an open-shell structure with a biradical character(y0)of 0.46 and its magnetic properties were further investigated using electron paramagnetic resonance(EPR)and superconducting quantum interference device(SQUID)*** methyl side chains showed a large impact on the molecular orbital *** HOMO/LUMO levels of QBDTS and QTBDTS were measured to be-5.66/-4.56 and-5.27/-4.48 eV,respectively,which are favorable for ambipolar charge transport in ***,the spin-coated QBDTS displayed hole and electron mobilities of 0.01 and 0.5 cm^(2)V^(-1)s^(-1)while QTBDTS showed a record high hole mobility of 1.8 cm^(2)V^(-1)s^(-1)and electron mobility of 0.3 cm^(2)V^(-1)s^(-1).Moreover,comparative studies of the thin film morphologies also manifested the beneficial influence of methyl side chains on film crystallinity and molecule *** results strongly proved that methyl side chain engineering can be a simple but efficient strategy for modulating electronic properties and molecular stacking *** work also represents a big advancement for quinoidal molecular semiconductors in ambipolar OFET applications.

关键词： side-chain modification quinoidal molecules ambipolar diradicals organic field-effect transistors

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应对学生接送问题的中小学与城市公共空间衔接的设计探索

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当代建筑 2024年第1期 24-27页

作者：罗晓琪汤朝晖华南理工大学建筑设计研究院有限公司

随着城市化的发展,城市与周边乡镇之间存在明显的“虹吸效应”,城市人口数量明显增加,同时在“撤点并校”政策的实施背景下,中小学的总数逐步下降,但规模却不断扩大。基于经济水平的不断提高,我国机动车驾驶员及私人汽车的数量呈爆炸式... 详细信息

随着城市化的发展,城市与周边乡镇之间存在明显的“虹吸效应”,城市人口数量明显增加,同时在“撤点并校”政策的实施背景下,中小学的总数逐步下降,但规模却不断扩大。基于经济水平的不断提高,我国机动车驾驶员及私人汽车的数量呈爆炸式增长趋势,“中国式接送”让校园出入口的拥堵情况不断加剧,给城市和学校周边居民带来严重的困扰。本文尝试以学生接送问题为切入点,探讨城市中小学在接送时段交通拥堵的原因,并从笔者团队近期的设计实践中梳理出城市中小学接送系统的构成和形式,进一步扩展中小学校园的功能。

关键词：学生接送中小学城市公共空间人性化设计

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宁夏地区9~24岁学生脊柱认知现状与行为生活方式的相关性

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宁夏医科大学学报 2024年第1期46卷 60-63,70页

作者：马钰汪南罗进玉罗晓琪杨惠芳周健宁夏医科大学公共卫生学院银川750004 宁夏环境因素与慢性病控制重点实验室银川750004

目的了解宁夏地区9~24岁学生脊柱认知与行为生活方式,并分析二者的关系。方法采用分层随机整群抽样方法,于2023年3月至5月通过问卷星平台对宁夏某地区各年级学生进行问卷调查。结果脊柱认知与饮食习惯、作息习惯、行为习惯和体育锻炼习... 详细信息

目的了解宁夏地区9~24岁学生脊柱认知与行为生活方式,并分析二者的关系。方法采用分层随机整群抽样方法,于2023年3月至5月通过问卷星平台对宁夏某地区各年级学生进行问卷调查。结果脊柱认知与饮食习惯、作息习惯、行为习惯和体育锻炼习惯存在相关性(P均<0.05);饮食习惯、作息习惯、行为习惯和体育锻炼习惯均为脊柱认知情况的影响因素(P均<0.05)。结论提倡从饮食习惯、行为生活方式和体育锻炼等方面加强9~24岁学生群体的脊柱认知健康宣教,增强其对脊柱健康的认识,促使其积极有效预防脊柱侧弯。

关键词：脊柱侧弯脊柱认知情况行为生活方式

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The Probability Density Function Related to Shallow Cumulus Entrainment Rate and Its Influencing Factors in a Large-Eddy Simulation

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Advances in Atmospheric Sciences 2024年第1期41卷 173-187页

作者： Lei ZHU Chunsong LU xiaoqi XU Xin HE Junjun LI Shi luo Yuan WANG Fan WANG Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD)and Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration Nanjing University of Information Science and TechnologyNanjing 210044China Nanjing Joint Institute for Atmospheric Sciences Nanjing 210019China College of Aviation Meteorology Civil Aviation Flight University of ChinaGuanghan 618307China Collaborative Innovation Center for Western Ecological Safety Lanzhou UniversityLanzhou 730000China Department of Geography Hong Kong Baptist UniversityHong Kong SAR 999077China

The process of entrainment-mixing between cumulus clouds and the ambient air is important for the development of cumulus *** obtaining the entrainment rate(λ)is particularly important for its parameterization within the overall cumulus parameterization *** this study,an improved bulk-plume method is proposed by solving the equations of two conserved variables simultaneously to calculateλof cumulus clouds in a large-eddy *** results demonstrate that the improved bulk-plume method is more reliable than the traditional bulk-plume method,becauseλ,as calculated from the improved method,falls within the range ofλvalues obtained from the traditional method using different conserved *** probability density functions ofλfor all data,different times,and different heights can be well-fitted by a log-normal distribution,which supports the assumed stochastic entrainment process in previous *** analysis demonstrate that the relationship betweenλand the vertical velocity is better than other thermodynamic/dynamical properties;thus,the vertical velocity is recommended as the primary influencing factor for the parameterization ofλin the *** results of this study enhance the theoretical understanding ofλand its influencing factors and shed new light on the development ofλparameterization.

关键词： large-eddy simulation cumulus clouds entrainment rate probability density functions spatial and temporal distribution

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Reductive lipid nanoparticles loaded with vinorelbine inhibit chemotherapy-induced invasion of cancer cells by modulating ENPP2

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Nano Research 2024年第4期17卷 2886-2898页

作者： xiaoqi Zhao Xuemeng Guo Mei Pang Weigen Qiu Zhenyu luo Qing Lin Yichao Lu Hang Yin Sijie Wang Huihui Liu Junlei Zhang Lihua luo Jian You College of Pharmaceutical Sciences Zhejiang University866 Yuhangtang RoadHangzhou 310058China Hangzhou Institute of Innovative Medicine Zhejiang UniversityHangzhou 310058China

Cancer is a predominant culprit behind worldwide death and accounts for up to 10 million deaths every *** is the primary therapeutic method employed for cancer in clinical settings and is essential in controlling tumor *** the advances in this field,tumor invasion and metastasis during treatment remain a significant cause of treatment ***,the underlying mechanisms involving such a disappointing phenomenon are still not fully ***(VNB)extends the lifespan of many cancer patients in the clinic as an emerging chemotherapy drug approved by Food and Drug Administration(FDA).However,VNB-induced tumor metastasis is still an intractable problem,which may be closely related to the abnormal oxidative stress generated during VNB-mediated ***,the study aims to construct a reductive nanosystem loaded with VNB,called VNB-VNP,to improve cancer cure rates and reduce tumor *** the reductive component vitamin E,VNB-VNP can effectively reduce oxidative stress and significantly outperform free VNB in preventing tumor *** transcriptome analysis shows that VNB-VNP can alleviate the over-expression of ectonucleotide pyrophosphatase/phosphodiesterase 2(ENPP2),which may be the main reason why VNB-VNP can inhibit tumor invasion and ***,the research designs a new platform for VNB treatment,which demonstrates promising efficacy in inhibiting neoplastic progression and identifies a new mechanism associated with VNB-induced tumor metastasis,which may offer several valuable references for enhancing chemotherapy efficacy in clinical anti-tumor therapy.

关键词： chemotherapy vinorelbine tumor Invasion lysophosphatidic acid ectonucleotide pyrophosphatase/phosphodiesterase 2(ENPP2)

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Reducing water and nitrogen inputs combined with plastic mulched ridge-furrow irrigation improves soil water and salt status in arid saline areas,China

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Journal of Arid Land 2021年第8期13卷 761-776页

作者： LI Cheng WANG Qingsong luo Shuai QUAN Hao WANG Naijiang luo xiaoqi ZHANG Tibin DING Dianyuan DONG Qin'ge FENG Hao Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas Ministry of EducationNorthwest A&F UniversityYangling 712100China College of Water Resources and Architectural Engineering Northwest A&F UniversityYangling 712100China Institute of Soil and Water Conservation Northwest A&F UniversityYangling 712100China Institute of Soil and Water Conservation Chinese Academy of Sciences and Ministry of Water ResourcesYangling 712100China College of Hydraulic Science and Engineering Yangzhou UniversityYangzhou 225009China

Plastic mulched ridge-furrow irrigation is a useful method to improve crop productivity and decrease salt accumulation in arid saline ***,inappropriate irrigation and fertilizer practices may result in ecological and environmental *** order to improve the resource use efficiency in these areas,we investigated the effects of different irrigation amounts(400(I1),300(I2)and 200(I3)mm)and nitrogen application rates(300(F1)and 150(F2)kg N/hm^(2))on water consumption,salt variation and resource use efficiency of spring maize(Zea mays L.)in the Hetao Irrigation District(HID)of Northwest China in 2017 and *** showed that soil water contents were 0.2%-8.9%and 13.9%-18.1%lower for I2 and I3 than for I1,respectively,but that was slightly higher for F2 than for *** salt contents were 7.8%-23.5%and 48.5%-48.9%lower for I2 than for I1 and I3,but that was 1.6%-5.5%higher for F1 than for *** salt leaching at the early growth stage(from sowing to six-leaf stage)and higher salt accumulation at the peak growth stage(from six-leaf to tasseling stage and from grain-filling to maturity stage)resulted in a higher soil salt content for I3 than for I1 and *** yields for I1 and I2 were significantly higher than that for I3 and irrigation water use efficiency for I2 was 14.7%-34.0%higher than that for *** with F1,F2 increased the partial factor productivity(PFP)of nitrogen fertilizer by more than 80%.PFP was not significantly different between I1F2 and I2F2,but significantly higher than those of other *** the goal of saving water and nitrogen resources,and ensuring food security,we recommended the combination of I2F2 to ensure the sustainable development of agriculture in the HID and other similar arid saline areas.

关键词： plastic mulched ridge-furrow irrigation crop water consumption soil salt variations resource use efficiency Hetao Irrigation District

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自复位钢板剪力墙结构性能分析

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建筑钢结构进展 2018年第1期20卷 23-31页

作者：罗小奇陈麟吴珊瑚广州大学土木工程学院广州510006

自复位钢板剪力墙是将后张拉节点和薄钢板剪力墙相结合而构成的一种新型抗侧力体系。后张拉梁柱节点和柱脚节点提供复位能力,减小结构震后残余变形,内填钢板则是主要的抗侧力元件和耗能元件。地震后通过更换钢板可使结构恢复正常使用功... 详细信息

自复位钢板剪力墙是将后张拉节点和薄钢板剪力墙相结合而构成的一种新型抗侧力体系。后张拉梁柱节点和柱脚节点提供复位能力,减小结构震后残余变形,内填钢板则是主要的抗侧力元件和耗能元件。地震后通过更换钢板可使结构恢复正常使用功能。建立了自复位钢板剪力墙有限元模型进行水平加载分析,研究了内填钢板和边缘框架的相互作用,以及内填钢板的厚度和跨高比对自复位钢板剪力墙强度、刚度、滞回性能及耗能能力的影响。分析结果表明,自复位钢板剪力墙的塑性变形发生在内填钢板上,边缘构件保持弹性以提供复位能力。随着钢板厚度和跨高比增大,自复位钢板剪力墙的强度、刚度、耗能能力增大,但残余变形也随之增大。自复位钢板剪力墙的复位刚度与钢板厚度无关,但随着跨高比的增大而减小。

关键词：自复位钢板剪力墙后张拉节点残余变形抗震性能

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面向全生命周期的飞机产品数据架构技术

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航空学报 2016年第1期37卷 324-334页

作者：周永罗小琦李荣强熊青岳中航工业成都飞机设计研究所成都610091

为增强产品数据管理能力,提升飞机研发效率和质量,基于构型控制技术和飞机产品数据管理的多年实践,提出了飞机统一产品数据架构(UA-PDA)概念,并依据飞机研制生命周期过程对UA-PDA的分类、组成以及相互之间的关系进行了定义和描述,对架... 详细信息

为增强产品数据管理能力,提升飞机研发效率和质量,基于构型控制技术和飞机产品数据管理的多年实践,提出了飞机统一产品数据架构(UA-PDA)概念,并依据飞机研制生命周期过程对UA-PDA的分类、组成以及相互之间的关系进行了定义和描述,对架构管理技术和方法也进行了探讨;此项技术研究对于复杂产品研制构建统一产品数据模型,实施产品研制和服务全过程的数据协同和构型控制,具有十分重要的意义。

关键词：产品生命周期管理数据架构功能架构构型控制工程协同

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基于文献计量统计分析的期刊影响力提升

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编辑学报 2018年第S1期30卷 221-223页

作者：王杨李琳罗晓琪中国科学院数学与系统科学研究院<系统工程理论与实践>编辑部北京100190 机械工业信息研究院<机械工程学报>编辑部北京100037

影响因子是衡量期刊影响力的重要指标。本文以《系统工程理论与实践》2015—2016年发表论文为样本,从学科专业方向、作者从属区域、文章归属机构等多角度统计分析发表论文的被引频次,得出样本的若干规律。结果为指导刊物良性发展提供了... 详细信息

影响因子是衡量期刊影响力的重要指标。本文以《系统工程理论与实践》2015—2016年发表论文为样本,从学科专业方向、作者从属区域、文章归属机构等多角度统计分析发表论文的被引频次,得出样本的若干规律。结果为指导刊物良性发展提供了支撑。

关键词：影响因子影响力样本统计

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Switching Behavior of Cascode GaN Under Influence of Gate Driver

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CSEE Journal of Power and Energy Systems 2024年第4期10卷 1816-1833页

作者： Bin luo Guangzhao luo Sihai Li School of Automation Northwestern Polytechnical UniversityXi’an 710072China

With high-frequency,low power dissipation and high-efficiency characteristics,Gallium nitride(GaN)power devices are of significant benefit in designing high-speed motor drives,as they improve performance and reduce ***,due to the cascode structure,coupling with the parasitics in gate driver and power circuits,power converters based on cascode GaN are prone to overshoot and oscillate on switching waveforms,which may lead to serious EMC problems,or even device *** complicated structure of cascode GaN device makes the gate driver design comparatively *** analytical model of the switching process considering gate driver parameters is proposed in this *** influence of gate driver parameters on switching behavior is investigated from the perspective of switching speed,waveform overshoot,and power ***-offs among overshoot,switching speed,and power loss are discussed;guidelines to design gate driver parameters are given.

关键词： Gallium nitride(GaN) gate driver oscillation and overshoot switching characteristics

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