检索结果-南通市图书馆

Efficient small-molecule donor with improved structural order and molecular aggregation enabled by side-chain modification

引用

Materials Reports(Energy) 2021年第4期1卷 54-60页

作者： Haiyan Chen Ke Yang peihao huang Dingqin Hu Hua Tang Jie Lv Gang Li Shirong Lu Chongqing Institute of Green and Intelligent Technology Chongqing SchoolUniversity of Chinese Academy of Sciences(UCAS Chongqing)Chinese Academy of SciencesChongqing400714PR China Chongqing University Chongqing400044PR China Department of Electronic and Information Engineering The Hong Kong Polytechnic UniversityHong Kong SARPR China

Side-chain modification is a proven effective approach for morphology manipulation in organic solar cells(OSCs).However,in-depth analysis and investigation involving side-chain modification towards morphology improvement,including molecular microstructure,orientating packing and aggregation are urgent for all-small-molecule(ASM)***,employing a fluorine-modified two-dimension benzodithiophene(BDT)as central unit,we contrastively synthesized two small-molecule donors,namely BDT-F-SR and BDT-F-R,each welding alkylthio side-chains on thienyl of central BDT unit and the other grafted non-sulfuric alkyl *** predicted,the synergetic side-chain modification of fluorination and alkyl changeover triggers diverse molecular dipole moments and orientations,resulting in different molecular energy levels,thermal stabilities,molecular planarity and ***,together with the preeminent small-molecule acceptor Y6,BDT-F-R-based ASM OSCs obtain enhanced power conversion efficiency(PCE)of 13.88%compared to BDT-F-SR-based devices(PCE of 12.75%)with more suitable phase-separation and balanced carrier *** contrast results reveal that alkyl sidechains seem to be a more satisfactory partner for fluorine-modified 2D BDT-based small-molecule donors compared to alkylthio pendants,and highlight the significance of subtle side-chain modification for molecular structural order fun-tuning and morphology control,laying the foundation for efficient ASM OSCs.

关键词： Organic solar cell Small-molecule donor Side-chain modification Molecular dipole moment Morphology

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Noisy intermediate-scale quantum computers

引用

Frontiers of physics 2023年第2期18卷 1-62页

作者： Bin Cheng Xiu-Hao Deng Xiu Gu Yu He Guangchong Hu peihao huang Jun Li Ben-Chuan Lin Dawei Lu Yao Lu Chudan Qiu Hui Wang Tao Xin Shi Yu Man-Hong Yung Junkai Zeng Song Zhang Youpeng Zhong Xinhua Peng Franco Nori Dapeng Yu Shenzhen Institute for Quantum Science and Engineering Southern University of Science and TechnologyShenzhen 518055China International Quantum Academy Shenzhen 518048China Guangdong Provincial Key Laboratory of Quantum Science and Engineering Southern University of Science and TechnologyShenzhen 518055China Department of Physics Southern University of Science and TechnologyShenzhen 518055China Hefei National Research Center for Physical Sciences at the Microscale and School of Physical Sciences University of Science and Technology of ChinaHefei 230026China CAS Center for Excellence in Quantum Information and Quantum Physics University of Science and Technology of ChinaHefei 230026China Hefei National Laboratory University of Science and Technology of ChinaHefei 230088China CAS Key Laboratory of Microscale Magnetic Resonance and School of Physical Sciences University of Science and Technology of ChinaHefei 230026China Quantum Computing Center and Cluster for Pioneering Research RIKENWakoshiSaitama 351-0198Japan Physics Department University of MichiganAnn ArborMI 48109-1040USA

Quantum computers have made extraordinary progress over the past decade,and significant milestones have been achieved along the path of pursuing universal fault-tolerant quantum *** advantage,the tipping point heralding the quantum era,has been accomplished along with several waves of *** hardware has become more integrated and architectural compared to its toddler *** controlling precision of various physical systems is pushed beyond the fault-tolerant ***,quantum computation research has established a new norm by embracing industrialization and *** joint power of governments,private investors,and tech companies has significantly shaped a new vibrant environment that accelerates the development of this field,now at the beginning of the noisy intermediate-scale quantum ***,we first discuss the progress achieved in the field of quantum computation by reviewing the most important algorithms and advances in the most promising technical routes,and then summarizing the next-stage ***,we illustrate our confidence that solid foundations have been built for the fault-tolerant quantum computer and our optimism that the emergence of quantum killer applications essential for human society shall happen in the future.

关键词： quantum computer quantum algorithm quantum chip

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

基于优先记忆库结合竞争深度Q网络的动态功率控制

引用

电讯技术 2019年第10期59卷 1132-1139页

作者：叶梓峰王永华万频杨贺淞黄沛濠广东工业大学自动化学院

针对认知无线电多用户的动态功率控制策略问题,提出了一种基于优先记忆库(Prioritized Experience Replay,PER)结合竞争深度Q网络(Dueling Deep Q Network,Dueling DQN)的功率控制方法。在不知道主用户的控制策略及发射功率情况下,次用... 详细信息

针对认知无线电多用户的动态功率控制策略问题,提出了一种基于优先记忆库(Prioritized Experience Replay,PER)结合竞争深度Q网络(Dueling Deep Q Network,Dueling DQN)的功率控制方法。在不知道主用户的控制策略及发射功率情况下,次用户以下垫式接入到主用户信道进行传输任务。微基站收集到的接收信号强度信息作为环境状态信息输入到竞争深度Q网络中,经过训练和学习后,得到次用户的动态功率控制策略。实验结果表明,次用户经过深度强化学习后能够找到最优的功率控制策略,并且在环境参数发生变化时也能快速调整自身的行为和控制策略,提高了频谱利用率和网络能效。

关键词：认知无线网络频谱分配功率控制深度强化学习

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

基于代谢活性的ε-聚赖氨酸杀菌动力学

引用

现代食品科技 2023年第11期39卷 94-100页

作者：刘振杰黄培豪陈述容顺彭飞艇陈玲郭伟鹏广东省科学院微生物研究所广东省微生物分析检测中心华南应用微生物国家重点实验室广东省微生物安全与健康重点实验室国家卫健委微生物食品营养与安全科技创新平台广东广州510070

ε-聚赖氨酸是一种高安全性天然食品防腐剂,具有抑菌谱广、抑菌活性强的特点。该研究以大肠杆菌(Escherichia coli)和枯草芽孢杆菌(Bacillus subtilis)为指标菌,利用荧光探针5-氰基-2,3-二甲苯基氯化四唑检测菌体细胞在ε-聚赖氨酸处理... 详细信息

ε-聚赖氨酸是一种高安全性天然食品防腐剂,具有抑菌谱广、抑菌活性强的特点。该研究以大肠杆菌(Escherichia coli)和枯草芽孢杆菌(Bacillus subtilis)为指标菌,利用荧光探针5-氰基-2,3-二甲苯基氯化四唑检测菌体细胞在ε-聚赖氨酸处理前后的代谢活性,计算相对活性,考察ε-聚赖氨酸的杀菌效果,利用Linear和Weibull模型拟合杀菌动力学过程。结果表明:液体体系条件下低质量分数(0.005%)ε-聚赖氨酸与大肠杆菌作用15 min,活性下降至起始活性的86.33%,120 min时为73.44%;ε-聚赖氨酸作用质量分数为0.025%时,处理15 min时活性为起始活性的21.06%,120 min时仅为3.61%。ε-聚赖氨酸杀灭枯草芽孢杆菌的效果与大肠杆菌相近。动力学分析显示ε-聚赖氨酸杀菌效果的Linear模型拟合度低,R2值低于0.70,Weibull模型在测试质量分数范围可精确拟合杀菌动力学过程,R2值大于0.97。该研究表明基于细胞代谢活性指标,Weibull模型可准确拟合ε-聚赖氨酸杀菌动力学过程。

关键词： ε-聚赖氨酸天然食品防腐剂抑菌活性代谢活性 Weibull模型

来源：

维普期刊数据库博看期刊

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Lanthanide complexes with d-f transition:new emitters for single-emitting-layer white organic light-emitting diodes

引用

Light(Science & Applications) 2023年第8期12卷 1623-1632页

作者： Peiyu Fang peihao Huo Liding Wang Zifeng Zhao Gang Yu Yanyi huang Zuqiang Bian Zhiwei Liu Beijing National Laboratory for Molecular Sciences State Key Laboratory of Rare Earth Materials Chemistry and ApplicationsCollege of Chemistry and Molecular EngineeringPeking University100871 BeijingChina

White organic light-emitting diodes(WOLEDs)is a new generation of lighting technology and has stimulated wide-ranging *** the advantage of simple device structure,single-emitting-layer WOLEDs(SEL-WOLEDs)still face the challenges of difficult material screening and fine energy level ***,we report efficient SEL-WOLEDs with a sky-blue emitting cerium(Ⅲ)complex Ce-TBO2Et and an orange-red emitting europium(Ⅱ)complex Eu(Tp2Et)2 as the emitters,showing a maximum external quantum efficiency of 15.9%and Commission Internationale de l'Eclairage coordinates of(0.33,0.39)at various *** importantly,the electroluminescence mechanism of direct hole capture and hindered energy transfer between the two emitters facilitate a manageable weight doping concentration of 5%for Eu(Tp2Et)2,avoiding the low concentration(<1%)of the low-energy emitter in typical *** results indicate that d-f transition emitters may circumvent fine energy level regulation and provide development potential for SEL-WOLEDs.

关键词： emitter diodes transition

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Narrative Devices, Spiritual Enlightenment and a Community of Common Kindness: Interpreting Chi Zijian's Urban Writing in the Stories of Harbin

引用

Frontiers of Literary Studies in China-Selected Publications from Chinese Universities 2022年第3期16卷 501-520页

作者： CHEN peihao College of Chinese Language and Literature Fujan Normal UniversityFuzhou 350007China

In her latest novel,the Stories of Harbin(Yanhuo Manjuan),Chi Zijian strives to portray an urban life imprinted with her personal *** order to effectively connect the various aspects of urban life and showcase its liveliness,she creates three special elements of narrative devices:A volunteer ambulance,Yuying Courtyard,and a sparrow hawk"Little Harrier."These elements are beyond ordinary things as they assume the narrative ethical functions of providing possibilities for the unfolding of storylines,summarizing general urban life experiences and uniting a community of common *** depicts the architecture,culture and geography,as well as the residents'daily life,hardships and destiny within the *** addition,from outside the city,she shapes the image of huang E,a unique child of nature,which not only enriches the character categories of Chinese contemporary literature,but also provides spiritual enlightenment to resolving the plight of urban *** urban writing of Chi carries forward the spiritual guidance and the modern introspective consciousness embedded in her previous writing and blazes a new trail for urban writing in Chinese contemporary literature.

关键词： Stories of Harbin Chi Zijian narrative device spiritual enlightenment a community of common kindness

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

A new dual-ion battery based on amorphous carbon

引用

Science Bulletin 2019年第21期64卷 1634-1642页

作者： Wei(Alex)Wang Hanxin huang Bin Wang Chang Qian peihao Li Jinhui Zhou Zibin Liang Chao Yang Shaojun Guo Department of Materials Science and Engineering College of EngineeringPeking UniversityBeijing 100871China BIC-ESAT College of EngineeringPeking UniversityBeijing 100871China Beijing Key Laboratory for Magnetoeletric Materials and Devices(BKL-MEMD) Peking UniversityBeijing 100871China Department of Energy and Resources Engineering College of EngineeringPeking UniversityBeijing 100871China

The Na-based dual-ion batteries(NDIBs),combining the advantages of Na-ion batteries and dual-ion batteries,are attracting more attention due to their merits of abundant source,low cost and high energy ***,the main challenges faced by NDIBs are their low capacity and poor ***,we report a new ion storage mechanism for high-performance NDIBs using amorphous carbon(AOMC)as *** the graphite carbon that can only accommodate the PF6-anion(typical DIB system),the AOMC herein can both accommodate Na+cation and PF6-anion due to its amorphous feature,which is conceptually new dual-ion system for achieving much higher ***-situ X-ray photoelectron spectroscopy,X-ray diffraction and Raman studies reveal that the disordered carbon in the AOMC can be transformed to the partial graphitic stacking in short range,improving both capacity and cycling stability of *** a consequence,the AOMC delivers a highly reversible storage capacity of 136 mAhg-1 for 800 cycles at a very high current density of 2.0 Ag-1,much higher than all the reported *** concept can be generalized to develop high-performance dual-ion full cell using sodium ion preintercalated materials as anode and AOMC as cathode.

关键词： Na-based dual-ion batteries Amorphous carbon Storage mechanism Larger interlayer spacing

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Superior strength-ductility combination resulted from hetero-zone boundary affected region in Cu-Fe layered material

引用

Journal of Materials Science & Technology 2024年第14期181卷 209-219页

作者： Hao Ran peihao Ye Fengjiao Guo Mingsai Wang Wuli Su Xue Chen Si Gao Nobuhiro Tsuji Yuntian Zhu Xiaochong Lu Chongxiang huang School of Aeronautics and Astronautics Sichuan UniversityChengdu 610065China Department of Materials Science and Engineering Kyoto UniversityYoshida HonmachiSakyo-kuKyoto 606-8501Japan Elements Strategy Initiative for Structural Materials(ESISM) Kyoto UniversityYoshida HonmachiSakyo-kuKyoto 606-8501Japan Department of Materials Science and Engineering City University of Hong KongHong KongChina Failure Mechanics and Engineering Disaster Prevention and Mitigation Key Laboratory of Sichuan Province Sichuan UniversityChengdu 610065China

The hetero-zone boundary affected region(HBAR)significantly influences the mechanical behaviors of layered materials,where the deformation mechanisms differ from those in the bulk *** this study,three kinds of heterogeneous Cu-Fe layered materials with different interface spacing but identical total thicknesses were *** effects of HBAR and strain partitioning on the tensile behavior of the lay-ered materials were *** results showed that layered materials had enhanced yield strength and uniform elongation with decreasing interface *** tensile deformation,geometrically nec-essary dislocations(GNDs)were generated at hetero-zone boundaries and piled up near them,resulting in hetero-deformation induced(HDI)strengthening and HDI work *** profilometry mea-surements showed that the Cu and Fe layers exhibited obvious strain partitioning and mutual *** decreasing interface spacing,strain partitioning is enhanced by interlayer constraint,which pre-vented strain localization at interfaces and thus improved the synergetic deformation of layers.A higher fraction of HBAR can improve the mechanical performance of heterogeneous layered *** study deepens our understanding of the relationship between HBAR and strength-ductility synergy and provides some insight into the design of layered materials.

关键词： Hetero-zone boundary affected region Layered material Strain partitioning Geometrically necessary dislocation Hetero-deformation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Molecular Phylogeny of the Genus Gloydius(Serpentes: Crotalinae)

引用

Asian Herpetological Research 2012年第2期3卷 127-132页

作者： Yan XU Qin LIU Edward A MYERS Lian WANG Song huang Yun HE peihao PENG Peng GUO College of Tourism and Urban-Rural Planning Chengdu University of Technology College of Life Sciences and Food Engineering Yibin University College of Staten Island Department of Biology 6S-143 2800 Victory Blvd.Staten IslandNY 10314 United States City University of New York Graduate Center 365 Fifth AvenueNew YorkNY 10016-4309 United States College of Life and Environment Sciences Huangshan University

Based on two mitochondrial genes (cyt b, ND4) and one nuclear gene (c-mos), we explored the relationships within the Asian pit viper genus Gloydius. In total, 23 samples representing 10 species were analyzed. All phylogenetic analyses support a monophyletic Gloydius with two major clades, one comprising G. brevicaudus, G. blomhoffii, and G. ussuriensis with the sister clade consisting of G. intermedius, G. saxatilis, G. halys and G. shedaoensis. The relationships among the three montane species G. strauchi, G. qinlingensis and G. liupanensis, as well as the two monophyletic groups, are unstable, and discussed. Divergence date estimation indicates that Gloydius lineage formed 15 Ma and diversification of the genus occurred at 9.89 Ma. Issues regarding the taxonomy of this genus are discussed where necessary.

关键词： molecular phylogenetics venomous snake pit viper mtDNA nDNA

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Distribution Characteristics of the Heavy Metal Cd in the Irrigation Water-Cultivated Soil-Fertilizer-Crop Ecosystem

引用

Asian Agricultural Research 2013年第6期5卷 86-89页

作者： Lei huang peihao PENG Wende CHENG Department of Land Resource Management College of ManagementChengdu University of Technology College of Tourism and Urban-Rural Planning Chengdu University of Technology

Shuangqiao Countryside of Neijiang City in hilly ground area in the midland of Sichuan Province was chosen as the study geographic area to survey and analyze the content distribution characteristics of the Cd in the irrigation water,ground water mud,surface layer cultivated soil,profile soil and the fertilizer which were often used in the locality,and in different crops set earth,fructification as well. The results showed that the content of Cd in the irrigation and ground water mud respectively comply with the national agriculture use irrigation standard and the contamination control standard value in agriculture use mud ( GB4284-84) respectively. The average contents in the surface cultivated soil and each layer of soil profile are all above the background level of Chengdu economic region ( 44% ) ,referring to a large scale pollution risk. The average value of Cd element in fertilizer was 1. 81 μg / g,which was higher than the third class standard of national soil environment quality; The average content of Cd element in the crops' set earth was 0. 410-0. 439 μg / g,which was higher than the second class standard of national soil environment quality and there was a measure of cumulation; The average values of Cd in crops' fructificationwas all below the primary standard of national soil environment quality,and the bioamplification coefficient sorting was CF( Cdpeanut) > CF( Cdcitrus) > CF ( Cdrice) > CF( Cdcorn) . Irrigation water had little influence on the soil Cd pollution,where fertilizer using was closely related to the Cd pollution in the surface cultivated soil in the survey area and had a certain influence on the Cd cumulation in the crops. The sorption and enrichment of crops' set earth and fructification was obviously different.

关键词： Cd Irrigation water Soil Fertilizer Crop

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：