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Efficient and stable organic solar cells enabled by a poly(carbazole phosphonic acid)hole transporter

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Science China Chemistry 2024年第6期67卷 1941-1945页

作者： Zhijun Ren siwei Luo Xiaoyu Shi Yunjie Dou Tianxiao Liu Lingyuan Wang Kwok Kiu Tsang Feifei Wang Yu Zhao Yangyang Liu Xiaodong hu Xiaoxiao Peng Wei Liu He Yan Shangshang Chen State Key Laboratory of Coordination Chemistry MOE Key Laboratory of High Performance Polymer Materials&TechnologySchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing210023China Department of Chemistry Guangdong-Hong Kong-Macao Joint Laboratory of Optoelectronic and Magnetic Functional MaterialsEnergy Institute and Hong Kong Branch of Chinese NationalEngineering Research Center for Tissue Restoration and ReconstructionHong Kong University of Science and TechnologyHong Kong999077China

Conventional self-assembled monolayer(SAM)hole transporters in organic solar cells(OSCs)generally suffer from poor uniformity and limited thickness tolerance,hindering their large-scale production.To overcome these limitations,we introduce a novel polymeric hole transporter synthesized by polymerizing carbazole phosphonic acid(PACz).The resultant Poly-2PACz material exhibits exceptional conductivity,high tolerance for variations in layer thickness,and improved film uniformity compared with conventional SAMs.Consequently,the OSCs utilizing Poly-2PACz achieve a remarkable power conversion efficiency of 19.1%and a high fill factor of 81.2%,surpassing the devices based on 2PACz.Moreover,Poly-2PACz-based OSCs demonstrate excellent operational stability,retaining over 80%of their initial efficiency after 1,400 h of continuous light exposure in ambient conditions.This work presents a novel strategy for designing hole transporters,paving the way for more efficient and stable OSCs.

关键词： organic solar cells hole transporters poly(carbazole phosphonic acid) stability

利多卡因联合曲马多注射液在子宫输卵管造影及疏通术中镇痛效果评价

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介入放射学杂志 2024年第6期33卷 651-654页

作者：杨泽冉孙学栋杨思维胡跃峰金龙首都医科大学附属北京友谊医院放射介入科

目的评价应用利多卡因胶浆宫颈口麻醉及曲马多宫腔注射麻醉在子宫输卵管造影术（HSG）及输卵管疏通治疗中的镇痛效果。方法选取2021年12月至2022年12月首都医科大学附属北京友谊医院收治的109例不孕症患者为研究对象。将患者分为麻醉... 详细信息

目的评价应用利多卡因胶浆宫颈口麻醉及曲马多宫腔注射麻醉在子宫输卵管造影术（HSG）及输卵管疏通治疗中的镇痛效果。方法选取2021年12月至2022年12月首都医科大学附属北京友谊医院收治的109例不孕症患者为研究对象。将患者分为麻醉组和非麻醉组。麻醉组HSG及输卵管通液疏通术中以利多卡因胶浆及曲马多注射液行宫颈及宫腔内麻醉，非麻醉组术中未予以任何麻醉措施，均为通畅患者。分析评估患者术中、术后0.5 h、术后24 h疼痛视觉模拟量表（VAS）评分。结果麻醉组HSG患者术中VAS评分低于非麻醉组，差异有统计学意义（P<0.01）。麻醉组所有患者均可良好耐受并完成HSG及输卵管疏通治疗。结论应用利多卡因胶浆联合曲马多注射液宫颈和宫腔内麻醉后，所有HSG及输卵管疏通治疗患者术中疼痛轻微，耐受性良好，不良反应发生率低。

关键词：疼痛 X线子宫输卵管造影输卵管通液输卵管疏通不孕症

Calculation of three-dimensional acoustic scattering from Gaussian rough under-ice surface using the Kirchhoff approximation method with modified reflection coefficient

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Chinese Journal of Acoustics 2020年第3期39卷 273-286页

作者： CHEN Wenjian LANG Pengyuan hu siwei YIN Jingwei SUN hui ZHANG Yuxiang Acoustic Science and Technology Laboratory Harbin Engineering UniversityHarbin 150001 Key Laboratory of Marine Information Acquisition and Security(Harbin Engineering University) Ministry of Industry and Information TechnologyHarbin 150001 College of Underwater Acoustic Engineering Harbin Engineering UniversityHarbin 150001

The Kirchhoff approximation with a modified reflection coefficient is used to calculate the three-dimensional acoustic scattering of a Gaussian rough under-ice surface.The concept of a local statistical average reflection coefficient of an under-ice surface is proposed in the calculation model.The scattered sound field of a two-dimensional Gaussian rough under-ice surface is divided into coherent scattering and incoherent scattering.A formula is derived for the scattering coefficient of each scattering component,and the three-dimensional scattering intensity is obtained.The relationships between the scattering intensity and(ⅰ)the root-meansquare height of the Gaussian rough under-ice surface,(ⅱ)the angle of incidence,and(ⅲ)the sound frequency are analyzed.The scattering intensity of a Gaussian rough under-ice surface is measured in a laboratory water tank,and the calculation results of the theoretical model are verified.The experimental results are compared with those of the theoretical model using(ⅰ)the present local statistical average reflection coefficient of an under-ice surface and(ⅱ)the mirror reflection coefficient of an under-ice surface from the literature.The calculation results of the model using the local statistical average reflection coefficient agree well with the experimental results.

关键词： surface. coefficient Gaussian

Modeling and characterizing the typical under-ice acoustic channel for the Arctic

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Chinese Journal of Acoustics 2019年第2期38卷 167-177页

作者： Zhu Guangping YIN Jingwei ZHOU huanling CHEN Wenjian hu siwei GUO Longxiang Acoustic Science and Technology Laboratory Harbin Engineering University College of Underwater Acoustic Engineering Harbin Engineering University

The properties of arctic underwater acoustic channel were researched using BurkeTwersky(BT) model and ray theory.In the BT model,sea ice ridge is assumed as a set of semi-elliptical cylinder randomly distributed on a stress-free surface.By approximation of low frequency and high frequency of the BT model,the reflection coefficients were calculated at different frequencies.On the basis of ray theory,the acoustic field was calculated and the properties of underwater acoustic channel was analyzed.Compared to underwater acoustic channel properties when the boundary is air,the results show that under the ice surface some sound rays disappear during transmission,because the ice surface reflection coefficients is less than absolute soft surface.Especially,the higher the frequency,the higher the under-ice transmission loss.As a result,under-ice condition is unfavourable for acoustic signals to travel far.Besides,as to the channel structure,the reflection coefficient of ice layer is smaller,the channel multi-path structure is not significant compared to water-air interface without ice.The research results are valuable for our understanding of hydroacoustic channel and the prediction of the sonar system working in the polar region.

关键词： Modeling and characterizing the typical under-ice acoustic channel for the Arctic

A small first-order DPA resistant AES implementation with no fresh randomness

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Science China(Information Sciences) 2022年第6期65卷 261-263页

作者： Man WEI siwei SUN Zihao WEI Zheng GONG Lei hu State Key Laboratory of Information Security Institute of Information EngineeringChinese Academy of Sciences Data Assurance and Communication Security Research Center Chinese Academy of Sciences School of Cyber Security University of Chinese Academy of Sciences School of Compute Science South China Normal University

Dear editor,Cryptographic algorithms exist in the form of software or hardware components inside security-critical information systems, which are often deployed in a hostile environment.Therefore, other than guaranteeing the security of the cryptographic algorithms in the black-box model, ensuring the security of the software or hardware components against the attacks exploiting the physical leakage of the underlying devices is considerably important. Among these attacks,

关键词： side channel analysis DPA threshold implementation domain-oriented masking AES

用精准思维冲破实施教育惩戒的内心藩篱:兼论《中小学教育惩戒规则(试行)》实施

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基础教育研究 2024年第1期 10-12页

作者：胡冬群殷思懿王思维长沙师范学院初等教育学院长沙410100 湖南师大附中星沙实验学校长沙410006 湖南南县浪拔湖镇中学南县413216

“分类指导、精准施惩”是蕴含在《中小学教育惩戒规则(试行)》中的重要指导思想,该文件对教育惩戒的内涵、措施、程序、监督与救济等进行了规范,为实施教育惩戒提供了依据和参照。目前仍有一些中小学教师对教育惩戒的概念、轻重、情绪... 详细信息

“分类指导、精准施惩”是蕴含在《中小学教育惩戒规则(试行)》中的重要指导思想,该文件对教育惩戒的内涵、措施、程序、监督与救济等进行了规范,为实施教育惩戒提供了依据和参照。目前仍有一些中小学教师对教育惩戒的概念、轻重、情绪、边界等问题认识不清,成为破解教育惩戒困局的最后藩篱。有效实施教育惩戒,必须遵循理念精准、裁量精准、监督精准和救济精准等原则。

关键词：精准思维教育惩戒落实

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聚酰亚胺漆包扁线的耐油水性能分析

当代化工研究 2024年第11期 76-78页

作者：胡伟章培胜杨思伟袁亚亚铜陵精达特种电磁线股份有限公司安徽244000 铜陵精达漆包线有限公司安徽244000

本文用三种不同聚酰亚胺漆,通过漆包工艺,制备了漆包扁线1#、线2#和线3#。分别制成U型试样和局部放电起始电压(PDIV)试样,做0.2%和0.5%的耐油水实验,然后测试外观、室温击穿电压和PDIV值,评价耐油水性能。结果发现:三个试样表现了不同... 详细信息

本文用三种不同聚酰亚胺漆,通过漆包工艺,制备了漆包扁线1#、线2#和线3#。分别制成U型试样和局部放电起始电压(PDIV)试样,做0.2%和0.5%的耐油水实验,然后测试外观、室温击穿电压和PDIV值,评价耐油水性能。结果发现:三个试样表现了不同的耐油水性能,漆包扁线1#可以耐0.2%和0.5%油水;线2#可以耐0.2%油水,不耐0.5%油水;线3#不耐0.2%和0.5%油水。本实验有效的区分了三种聚酰亚胺漆的耐油水性能,油中含水量增加,加剧聚酰亚胺绝缘层失效。

关键词：聚酰亚胺耐油水外观击穿电压局部放电起始电压

基于文献计量学的患者服务管理研究热点与趋势分析

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中国医院 2024年第6期28卷 29-32页

作者：孙艳坤胡佩琳周翔洪学智刘朝忠钱英孙思伟北京大学第六医院(国家精神疾病医学中心) 北京市100191 北京市卫生健康委员会北京市100053 北京中医药大学北京市100029

目的:探讨近年来患者服务管理的研究现状及热点趋势。方法:以“患者服务管理”或“患者体验”为关键词,在中国知网(CNKI)数据库进行检索,检索时间为2015-2023年;利用CiteSpace软件对检索到的文献进行数据处理和可视化分析。结果:共检索... 详细信息

目的:探讨近年来患者服务管理的研究现状及热点趋势。方法:以“患者服务管理”或“患者体验”为关键词,在中国知网(CNKI)数据库进行检索,检索时间为2015-2023年;利用CiteSpace软件对检索到的文献进行数据处理和可视化分析。结果:共检索到393篇有效文献,主要集中在满意度、患者体验、服务质量、门诊管理、护理质量及投诉管理等方面。结论:患者服务管理领域的研究重点关注满意度、患者体验、就医体验和服务质量等方面;数字化技术和信息技术等新技术的出现为患者服务管理领域的发掘和拓展带来了新的机遇和挑战。

关键词：患者服务管理就医体验患者体验医疗服务质量

Cobalt doping boosted electrocatalytic activity of CaMn3O6 for hydrogen evolution reaction

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Nano Research 2022年第4期15卷 2870-2876页

作者： Qun Li Kaisi Liu siwei Gui Jiabin Wu Xiaogang Li Zaifang Li Hongrun Jin hui Yang Zhimi hu Wenxi Liang Liang huang Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China China-Australia Institute for Advanced Materials and Manufacturing Jiaxing UniversityJiaxing 314001China State Key Laboratory of Material Processing and Die&Mold Technology Department of MechanicsSchool of Aerospace EngineeringHuazhong University of Science and TechnologyWuhan 430074China

The development of earth-abundant-metal-based electrocatalysts with high efficiency and long-term stability for hydrogen evolution reaction(HER)is crucial for the clean and renewable energy application.Herein,we report a molten-salt method to synthesize Co-doped CaMn_(3)O_(6)(CMO)nanowires(NWs)as effective electrocatalyst for HER.The as-obtained CaMn_(3-x)Co_(x)O_(6)(CMCO)exhibits a small onset overpotential of 70 mV,a required overpotential of 140 mV at a current density of 10 mA·cm^(-2),a Tafel slope of 39 mV·dec^(-1)in 0.1 M HClO_(4),and a satisfying long-term stability.Experimental characterizations combined with density functional theory(DFT)calculations demonstrate that the obtained HER performance can be attributed to the Co-doping which altered CMO’s surface electronic structures and properties.Considering the simplicity of synthesis route and the abundance of the pertinent elements,the synthesized CMCO shows a promising prospect as a candidate for the development of earth-abundant,metal-based,and cost-effective electrocatalyst with superior HER activity.Our results also establish a strategy of rational design and construction of novel electrocatalyst toward HER by tailoring band structures of transition metal oxides(TMOs).

关键词： CMCO nanowires hydrogen evolution reaction electronic structure dopant