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Enhanced charge collection of AgNWs-based top electrode to realize high-performance,all-solution processed organic solar cells

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Science China Chemistry 2024年第10期67卷 3347-3356页

作者： Juanyong Wan Yang Chen Weijie Chen jinfeng xia Guang Zeng Jianlei Cao Chuang Jin Yunxiu Shen xiaoxiao Wu Haiyang Chen Junyuan Ding Xue-mei Ou Yaowen Li Yongfang Li Laboratory of Advanced Optoelectronic Materials Suzhou Key Laboratory of Novel Semiconductor-Optoelectronics Materials and DevicesCollege of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China Jiangsu Key Laboratory of Advanced Negative Carbon Technologies Soochow UniversitySuzhou 215123China State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials Jiangsu Key Laboratory of Advanced Functional Polymer Design and ApplicationCollege of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijing 100190China Jiangsu Sidike New Materials Science and Technology Co. Ltd.Suqian 215400China

All-solution processed organic solar cells are the ultimate aim of printable photovoltaics,but their electrical losses arising from poor contact of top electrodes greatly limit efficiency *** solve the problem,a solution-processed hybrid top electrode was constructed using silver nanowires(AgNWs)as the skeleton and ZnO nanoparticles(ZnO-NPs)as the *** constructing the skeleton,a spin-rinsing treatment was first used to reduce the amount of the residual insulating polyvinylpyrrolidone wrapped around the AgNWs to promote intimate contact among the AgNWs in the ***,the ZnO-NPs matrix was deposited onto the AgNWs skeleton,bridging the AgNWs skeleton with the underlayer ZnO-NPs electron transporting layer(ETL).The underlayer ZnO-NPs ETL can also induce the growth of the ZnO-NPs matrix to minimize lattice mismatch,which creates additional transport channels from the ETL to the AgNWs skeleton for charge *** a result,the obtained electrode significantly enhances the electrical contact in the device,thus delivering record power conversion efficiencies of 16.04%and 14.54%for rigid and flexible all-solution processed OSCs,respectively.

关键词： solution-processed top electrode organic solar cells AgNWs electrical contact

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学术背景独立董事对企业战略变革的影响研究——基于产品市场竞争的调节效应

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长春理工大学学报（社会科学版） 2024年第2期37卷 115-122页

作者：夏金凤陆新文胡翠萍安徽农业大学经济管理学院安徽合肥230036

以2016—2020年A股上市公司为研究样本,结合高层梯队理论,研究学术背景独立董事对企业战略变革的影响。研究发现:学术背景独立董事与企业战略变革之间存在着显著的负相关关系,表明学术背景独立董事显著负向影响企业战略变革。进一步研... 详细信息

以2016—2020年A股上市公司为研究样本,结合高层梯队理论,研究学术背景独立董事对企业战略变革的影响。研究发现:学术背景独立董事与企业战略变革之间存在着显著的负相关关系,表明学术背景独立董事显著负向影响企业战略变革。进一步研究发现:产品市场竞争对学术背景独立董事与企业战略变革起调节效应,产品市场竞争会强化学术背景独立董事对企业战略变革的负向影响。相比于国有企业,非国有企业学术背景独立董事对企业战略变革的抑制作用更强。

关键词：学术背景独立董事企业战略变革产品市场竞争产权异质性

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Bi/Bi_2O_3 sensor for quantitation of dissolved oxygen in molten salts

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Journal of Advanced Ceramics 2018年第1期7卷 1-4页

作者： Huiping ZHENG Hongqiang NIAN jinfeng xia Guohong ZHOU Danyu JIANG Qiang LI East China Normal University Shanghai Institute of Ceramics Chinese Academy of Sciences

To quantify the oxygen content in molten salts, we examined the performance of an yttria-stabilized zirconia solid electrolyte oxygen sensor with a Bi/Bi203 reference electrode, focusing on its output accuracy. When the above sensor was tested in a flow of gas with known oxygen partial pressure, P02, a linear relationship between lgp% and the electromotive force （EMF） was observed, and the correlation slope exhibited a positive deviation from Nernstian behavior. EMF measurements performed in molten NaC1-KC1 indicated that the oxygen content of this salt mixture increased with increasing oxygen partial pressure in the covering gas, in agreement with Henry＇s law. Moreover, the EMF exhibited a linear decrease with increasing melt temperature of molten NaC1-KC1, in agreement with the theoretical model. Finally, a relationship between the structure of molten NaC1-KC1 and its oxygen diffusion behavior was established. As a result, the developed sensor was demonstrated to be well suited for determining the oxygen content of molten salts.

关键词： molten salt oxygen sensor Bi/Bi203 oxygen content

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基于ADASYN和随机森林的UWB非视距识别方法

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德州学院学报 2024年第4期40卷 28-32页

作者：胡方勇孙春银夏金凤刘延旭吉林化工学院信息与控制工程学院吉林吉林132022 德州学院计算机与信息学院山东德州253023

室内UWB(超宽带)定位系统中视距、非视距信号不平衡是常见现象,过分依赖平衡数据集进行NLOS(非视距传播)识别面临着数据采集工作量增加和识别性能降低问题。为解决这一挑战,提出ADASYN和随机森林结合的非视距识别方法。应用ADASYN算法... 详细信息

室内UWB(超宽带)定位系统中视距、非视距信号不平衡是常见现象,过分依赖平衡数据集进行NLOS(非视距传播)识别面临着数据采集工作量增加和识别性能降低问题。为解决这一挑战,提出ADASYN和随机森林结合的非视距识别方法。应用ADASYN算法将减少视距、非视距信号数据量之间的差距,可实现样本数量平衡;结合随机搜索与五折交叉验证,实现随机森林模型超参数的自动优化以提升模型的整体效率。将所提出的方法与其他常见的机器学习方法进行比较,实验结果表明,所提出方法在具有最优识别性能的同时有效地缩减了调参时间。

关键词：非视距识别数据不平衡随机森林机器学习

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三七总皂苷和马齿苋多糖合用的抗炎功效评价

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香料香精化妆品 2024年第2期 89-93页

作者：夏金凤陈影杨万松张钰雯陈真昆明医科大学科技成果孵化中心云南昆明650500 昆明医科大学人文与管理学院云南昆明650500 云南悦芳季生物资源开发有限公司云南昆明650501

为了探讨不同质量浓度下三七总皂苷和马齿苋多糖的协同抗炎组方,将不同质量浓度的三七总皂苷(1、5、25、125μg/mL)和马齿苋多糖(2、10、50、250μg/mL)两两复配,以100μg/mL地塞米松为阳性对照,通过测定炎症因子TNF-α的抑制率评估16... 详细信息

为了探讨不同质量浓度下三七总皂苷和马齿苋多糖的协同抗炎组方,将不同质量浓度的三七总皂苷(1、5、25、125μg/mL)和马齿苋多糖(2、10、50、250μg/mL)两两复配,以100μg/mL地塞米松为阳性对照,通过测定炎症因子TNF-α的抑制率评估16种复配组合物的抗炎功效,并采用协同分数(synergy score值)系统定量评价复配组合物中2种成分的相互作用。结果显示,当质量浓度为125μg/mL的三七总皂苷与50μg/mL或250μg/mL的马齿苋多糖复配时,均对TNF-α具有显著的抑制效应,抑制率分别为45.18%和61.42%,其抑制作用与100μg/mL的地塞米松(抑制率为53.17%)无显著性差异(P>0.05),synergy score值分别为15.58和26.44。综上,125μg/mL的三七总皂苷与50μg/mL或250μg/mL的马齿苋多糖合用时协同抑制TNF-α的产生,但其余14种更低剂量的复配组合仅表现为相加作用。

关键词：协同作用三七总皂苷马齿苋多糖炎症因子

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Degradation Mechanism of Polyimide Film Under Square Impulse Voltages

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高电压技术 2013年第8期39卷 1925-1931页

作者： LUO Yang WU Guangning xia jinfeng ZHU Guangya WANG Peng CAO Kaijiang School of Electrical Engineering Southwest Jiaotong University Chengdu 610031 China Zhuzhou Electric Locomotive Co. Ltd. China South Locomotive & Rolling Stock Co. Ltd. Zhuzhou 412001 China

Partial discharge (PD) under a sequence of high-repetition-rate square pulses is one of the key factors leading to premature failure of insulation systems of inverter-fed motors. Polyimide (PI) film is an important type of insulating material used in the inverter-fed motors. In this paper, micro-morphology and structure change of PI film aged by bipolar continuous square impulse voltage (BCSIV) with ampli- tude above partial discharge inception voltage (PDIV) are investigated by scanning electron microscope (SEM). The chemical bonds of PI chain are analyzed through Fourier transform infrared spectroscopy (FTIR). The results show that the degradation mechanism of PI film is the fracturing of chemical bonds caused by the erosion from PDs. Three layers are displayed in both 100 HN film and 100 CR film. The de- gradation path of PI film is initiated from surface and then gradually extends to the interior with continuous aging. Nano-fillers can retard the degradation of PI film and prolong its lifetime.

关键词：聚酰亚胺薄膜脉冲电压降解机理方形傅里叶变换红外光谱扫描电子显微镜局部放电 PI膜

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基于计算图与CRLB的集群编队队形优化方法

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德州学院学报 2024年第2期40卷 15-20页

作者：夏金凤刘延旭朱恒伟荣垂霆唐彩虹赵丽丽德州学院计算机与信息学院山东德州253023

集群内定位精度是无人机集群应用于各类复杂任务的先决条件。面向集群编队队形定位优化需求,建立了基于相对距离和到达角的集群内协同融合定位模型,推导了领航-跟随编队下的融合定位克拉美罗下界理论极限值,建立了队形定位优化评价函数... 详细信息

集群内定位精度是无人机集群应用于各类复杂任务的先决条件。面向集群编队队形定位优化需求,建立了基于相对距离和到达角的集群内协同融合定位模型,推导了领航-跟随编队下的融合定位克拉美罗下界理论极限值,建立了队形定位优化评价函数,作为集群编队队形优化理论依据。针对集群编队队形优化评价函数梯度求解难的问题,构建了队形定位优化评价函数的梯度计算图,通过反向传播,逐步得到最终梯度值,基于共轭梯度法,设计了最优队形搜索算法。通过数值仿真验证结果表明:与遗传算法和蜜獾算法相比,基于计算图与CRLB的集群编队队形优化方法可以得到更优的编队队形,集群理论定位精度也更高。

关键词：无人机集群队形优化克拉美罗下界计算图

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Controlling the Reactivity of IBA-N_(3)by Switching Halogen Salts:Providing a Universal Strategy for Haloazidation of Alkenes

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Chinese Journal of Chemistry 2024年第16期42卷 1839-1845页

作者： Chen-Xi xia Xin-Lei Sun jinfeng Zhang Yue Ren Yan Yu Kuai Wang Ling-Guo Meng Key Laboratory of Green and Precise Synthetic Chemistry and Applications Ministry of Education/School of Chemistry and Materials ScienceHuaibeiNormal UniversityHuaibeiAnhui 235000China

Although various routes have been reported for haloazidation,unavoidable problems exist,such as environmentally unfriendly monomer halogen,the need for in situ generation of unstable halogen azides(XN3),applicability to one type of haloazidation and inability to precisely control ***,we developed a universal strategy for haloazidation of alkenes through controlling the reactivity of IBA-N_(3) by switching halogen salts,allowing for the synthesis of a diversity of halogen azide *** studies have shown that by tuning the reactivity of IBA-N_(3) via switching halogen salts,different intermediates can be controllably produced to achieve regioselectivityand chemoselectivity in thehaloazidationof alkenes.

关键词： Haloazidation Alkene IBA-N_(3) Halogen salts Difunctionalization Selectivity Radicals Synthetic methods

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Human Face Super-Resolution Based on Hybrid Algorithm

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Advances in Molecular Imaging 2018年第4期8卷 39-47页

作者： jinfeng xia Zhizheng Yang Fang Li Yuanda Xu Nan Ma Chunxing Wang Shandong Normal University Jinan China

Aiming at the problems of image super-resolution algorithm with many convolutional neural networks, such as large parameters, large computational complexity and blurred image texture, we propose a new algorithm model. The classical convolutional neural network is improved, the convolution kernel size is adjusted, and the parameters are reduced;the pooling layer is added to reduce the dimension. Reduced computational complexity, increased learning rate, and reduced training time. The iterative back-projection algorithm is combined with the convolutional neural network to create a new algorithm model. The experimental results show that compared with the traditional facial illusion method, the proposed method can obtain better performance.

关键词： Face Hallucination Super Resolution Convolutional Network Hybrid Algorithm

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Analytical Solutions for an Isotropic Elastic Half-Plane with Complete Surface Effects Subjected to a Concentrated/Uniform Surface Load

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Acta Mechanica Solida Sinica 2024年第3期37卷 371-384页

作者： xia-Hui Pan School of Civil Engineering Henan Polytechnic UniversityJiaozuo454003China

Within the context of Gurtin-Murdoch surface elasticity theory,closed-form analytical solutions are derived for an isotropic elastic half-plane subjected to a concentrated/uniform surface *** the effects of residual surface stress and surface elasticity are *** stress function method and Fourier integral transform technique are *** solutions are provided in a compact manner that can easily reduce to special situations that take into account either one surface effect or none at *** results indicate that surface effects generally lower the stress levels and smooth the deformation profiles in the *** elasticity plays a dominant role in the in-plane elastic fields for a tangentially loaded half-plane,while the effect of residual surface stress is fundamentally crucial for the out-of-plane stress and displacement when the half-plane is normally *** the remaining situations,combined effects of surface elasticity and residual surface stress should be *** results for a concentrated surface force serve essentially as fundamental solutions of the Flamant and the half-plane Cerruti problems with surface *** solutions presented in this work may be helpful for understanding the contact behaviors between solids at the nanoscale.

关键词： Surface effects Residual surface stress Surface elasticity Half-plane Analytical solutions

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