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Chinese Journal of Polymer Science 2005年第1期23卷 55-61页

作者： gui-longwu Jin-gangLiu Zuo-bangLi Zi-yiGe LinFan Shi-yongYang LaboratoryofAdvancedPolymerMaterials CenterforMolecularScienceInstituteofChemistryChineseAcademyofSciencesBeijing100080China InstituteofPolymerScienceandTechnology HebeiUniversityofTechnologyTianjin300130China

An aromatic diamine monomer,4,4'-bis(3-amino-5-trifluoromethyl phenoxy)-biphenyl (TFBPDA),wassynthesized via the nucleophilic displacement reaction of 3,5-dinitrobenzotrifluoride and 4,4'-*** monomer wasreacted with various aromatic dianhydrides via the high temperature polycondensation procedure to provide a series *** polyimides,PI-1 to PI-4,show good solubility not only in aprotic solvents,such as N-methyl-2-pyrrolidinone and N,N-dimethylacetamide,but also in many common solvents,such as m-cresol,chloroform ***-4,derived from 4,4'-(hexafluoroisopropylidene)diphthalic anhydride and TFBPDA,was even soluble ***,PI films exhibit good thermal stability,outstanding transparency in the visible light region and acceptablemechanical and electrical *** excellent combined properties of the polyimides make them as a good candidate forfabricating microelectronics.

关键词： Diamine Polyimide Trifluoromethyl Nucleophilic displacement Solubility.

Common Cuckoo(Cuculus canorus)nestlings adapt their begging behavior to the host signal system

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Avian Research 2024年第3期15卷 352-362页

作者： Sabah Mushtaq Puswal Guo Zhong Xuan Zhang longwu Wang Wei Liang Ministry of Education Key Laboratory for Ecology of Tropical Islands Key Laboratory of Tropical Animal and Plant Ecology of Hainan ProvinceCollege of Life SciencesHainan Normal UniversityHaikou571158China School of Life Sciences Guizhou Normal UniversityGuiyang550001China

Common Cuckoos(Cuculus canorus)dependent on parental care for post-hatching demonstrate an intriguing ability to modify their begging vocalizations to ensure maximum care and resources from their interspecific foster ***,we compared begging calls of the Common Cuckoo nestlings fed by four host species,the Grey Bushchat(Saxicola ferreus),Siberian Stonechat(Saxicola maurus),Daurian Redstart(Phoenicurus auroreus),and Oriental Magpie-robin(Copsychus saularis).Results showed that begging calls of the stonechat-,redstart-,and robin-cuckoo resemble those of host species'nestlings in various aspects like low frequency,high frequency,frequency bandwidth and peak frequency,while the bushchat-cuckoo chicks'begging calls were only comparable to their host species in terms of how long they lasted and their peak *** addition,cuckoo nestlings raised in different host nests displayed significant variations in their begging calls in low and peak *** study suggests that cuckoo nestlings do not mimic host species nestlings'begging calls throughout the nestling period,but may tune their begging calls according to host species,while begging calls vary with cuckoo and host species nestlings'*** research should study the parents'reactions to these calls in different host species for a better understanding of the mechanisms underlying such adaptations.

关键词： Acoustic tuning Begging call Brood parasitism Cuckoo Coevolution

Oriental Reed Warblers do not abandon Common Cuckoo chicks during prolonged nestling periods

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Avian Research 2024年第3期15卷 369-373页

作者： Hanlin Yan Huahua Zhao Haixia Luo longwu Wang Laikun Ma Wei Liang Ministry of Education Key Laboratory for Ecology of Tropical Islands Key Laboratory of Tropical Animal and Plant Ecology of Hainan ProvinceCollege of Life SciencesHainan Normal UniversityHaikou 571158China School of Life Sciences Guizhou Normal UniversityGuiyang 550001China School of Life Sciences Hebei UniversityBaoding 071002China Department of Biology and Food Science Hebei Normal University for Nationaliti

The Oriental Reed Warbler(Acrocephalus orientalis)is one of the most commonly used hosts for the parasitic Common Cuckoo(Cuculus canorus).However,as hosts that feed unrelated parasitic nestlings may suffer extra reproductive costs,they may be less willing to care for nestlings that have prolonged nestling *** test this hypothesis,the duration of feeding by Oriental Reed Warblers under natural conditions for their own nestlings was compared with the duration of feeding under natural conditions for Common Cuckoo nestlings and for artificially prolonged cuckoo *** results showed that Oriental Reed Warblers did not starve,drive away,or desert any of the nestlings in the experiment,and neither parent was left *** experimental study indicates that both Oriental Reed Warbler parents were willing to care for nestlings with a prolonged nestling period(up to 30 days,twice the average duration time that the Oriental Reed Warblers fed their own chicks in natural conditions).However,further experiments and observations are required in other host bird species to examine whether both parents or one of the parents may exhibit the behavior of abandoning nestlings with a prolonged nestling period.

关键词： Brood parasitism Common Cuckoo Deserted nestling Oriental Reed Warbler Prolonged nestling period

Regulation of photophysical and electronic properties of I-III-VI quantum dots for light-emitting diodes

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Science China Materials 2024年第9期67卷 2737-2748页

作者： Xiaofei Dong Xianggao Li Shougen Yin Zheng Li longwu Li Jingling Li School of Science Langfang Normal UniversityLangfang 065000China School of Chemical Engineering and Technology Tianjin UniversityTianjin 300350China Institute of Material Physics Key Laboratory for Optoelectronic Materials and Devices of TianjinKey Laboratory of Display Materials and Photoelectric Devices of Ministry of EducationTianjin University of TechnologyTianjin 300384China College of Chemistry and Materials Science Langfang Normal UniversityLangfang 065000China School of Materials Science and Hydrogen Energy Foshan UniversityFoshan 528000China

Quantum dot light-emitting diodes(QLEDs)have become an important research direction in the pursuit of next-generation display technology owing to their favorable attributes,including high energy efficiency,wide color gamut,and low *** in the luminous efficiency and operating life of QLEDs have been achieved by enhancing the photoluminescence efficiency of the quantum dots(QDs)and optimizing the device ***,the current mainstream QDs contain heavy metal elements such as lead and cadmium,which restrict the development and application of QD *** new types of environmentally friendly QDs is crucial.I-III-VI semiconductor QDs have been developed as luminescent materials for constructing high color rendering index QLEDs,owing to the outstanding photophysical properties of these QDs,such as composition-dependent tunable bandgap,large Stokes shift,and highefficiency ***,the microstructures of heterojunctions,especially the surface states and interface states,affect the recombination and transport of carriers in electroluminescent(EL)devices with multilayer thin film structures,which in turn influence the luminous efficiency and stability of the *** review focuses on the synthesis strategies of I-III-VI multi-component QDs and provides an in-depth understanding of the luminescence mechanism and the regulation of photophysical and electronic ***,the application of I-III-VI QDs in multi-color and white EL QLEDs is discussed and the challenges and outlook are addressed.

关键词： Ⅰ-Ⅲ-Ⅵquantum dots synthesis method defect states luminescence mechanism light-emitting diodes

A new twist to the interplay between superconductivity and Kondo correlation

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Science China(Physics,Mechanics & Astronomy) 2024年第8期67卷 1-2页

作者： gui-Lu Long Department of Physics Tsinghua UniversityBeijing 100084China Beijing Academy of Quantum Information Sciences Beijing 100193China

Recently,Deng et al.[1] found a new twist to the intriguing physics resulting from the interplay between Kondo correlation and *** correlation [2,3] and superconductivity [4,5] are two fundamental phenomena in condens... 详细信息

关键词： Kondo twist

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Numerical investigation and modeling of sweep effects on inlet flow field of axial compressor cascades

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Chinese Journal of Aeronautics 2024年第2期37卷 296-308页

作者： Jiancheng ZHANG Donghai JIN Xingmin gui School of Energy and Power Engineering Beihang UniversityBeijing 100191China Jiangxi Research Institue of Beihang University Nanchang 330096China

Swept blades are widely utilized in transonic compressors/fans and provide high load,high through-flow,high efficiency,and adequate stall ***,there is limited quantitative research on the mechanism of the effect of swept blades on the flow field,resulting in a lack of direct quantitative guidance for the design and analysis of swept blades in fans/*** better understand this mechanism,this study employs a reduced-dimensional force equilibrium method to analyze more than 1500 swept cascades *** verify that circumferential fluctuation terms are responsible for inducing radial migration in the inlet airflow field of the swept blade,resulting in variations in the incidence angle and consequently leading to changes in the characteristics of the swept ***,a combination of simple functions and machine learning is utilized to model the circumferential fluctuation terms and quantify the sweep *** prediction accuracy of the model is high,with coefficient of determination greater than 0.95 on the test *** the model is applied in a meridional flow analysis program,the calculation accuracy of the program for the incidence angle is improved by 0.4°and 0.6°at the design and off-design conditions respectively,compensating for the program’s original ***,the model can also provide quantitative guidance for the design of swept blades,thereby reducing the number of design iterations and improving design efficiency.

关键词： Turbomachinery Sweep aerodynamics Quasi-3D method Incidence angle Circumferential fluctuation Machine learning

Robust Feedback Set Stabilization of Logic Networks with State-Dependent Uncertain Switching and Control Constraints

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Journal of Systems Science & Complexity 2024年第2期37卷 629-646页

作者： DAI Chaoqun GUO Yuqian gui Weihua School of Automation Central South UniversityChangsha 410083China

This study investigates the robust feedback set stabilization of switched logic control networks(SLCNs)with state-dependent uncertain switching and control ***,based on the properties of the semi-tensor product of matrices and the vector representation of logic,an SLCN with state-dependent uncertain switching and control constraints is expressed in algebraic ***,an input transformation and a switching model are constructed to transfer the original SLCN into one with a free control input and arbitrary *** equivalence between the set stabilizability of the original SLCN and that of the resulting SLCN is *** on such equivalence,the authors propose a necessary and sufficient condition for robust feedback set ***,an example is presented to demonstrate the application of the results obtained.

关键词： Input transformation robust control invariant subset robust feedback set stabilizability semi-tensor product state-dependent constraints switched logic control network

Common Cuckoo(Cuculus canorus) nestlings adapt their begging behavior to the host signal system

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Avian Research 2024年第3期 352-362页

作者： Sabah Mushtaq Puswal Guo Zhong Xuan Zhang longwu Wang Wei Liang Ministry of Education Key Laboratory for Ecology of Tropical Islands Key Laboratory of Tropical Animal and Plant Ecology of Hainan Province College of Life Sciences Hainan Normal University School of Life Sciences Guizhou Normal University

Common Cuckoos(Cuculus canorus) dependent on parental care for post-hatching demonstrate an intriguing ability to modify their begging vocalizations to ensure maximum care and resources from their interspecific foster parents. Here, we compared begging calls of the Common Cuckoo nestlings fed by four host species, the Grey Bushchat(Saxicola ferreus), Siberian Stonechat(Saxicola maurus), Daurian Redstart(Phoenicurus auroreus),and Oriental Magpie-robin(Copsychus saularis). Results showed that begging calls of the stonechat–, redstart–,and robin–cuckoo resemble those of host species' nestlings in various aspects like low frequency, high frequency,frequency bandwidth and peak frequency, while the bushchat–cuckoo chicks' begging calls were only comparable to their host species in terms of how long they lasted and their peak frequency. In addition, cuckoo nestlings raised in different host nests displayed significant variations in their begging calls in low and peak *** study suggests that cuckoo nestlings do not mimic host species nestlings' begging calls throughout the nestling period, but may tune their begging calls according to host species, while begging calls vary with cuckoo and host species nestlings' ages. Future research should study the parents' reactions to these calls in different host species for a better understanding of the mechanisms underlying such adaptations.

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Bianjing Spectacle: Soundscapes of Bianjing and Identities in Song Dynasty Literature

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Frontiers of Literary Studies in China-Selected Publications from Chinese Universities 2024年第1期18卷 77-102页

作者： LI gui School of Humanities Shanghai Normal UniversityShanghai 200234China

By closely examining the literary works of the Song Dynasty,such as prose,poetry,rhyme-prose,lyrics,notes,and miscellaneous theses,this paper combines historical and literary evidence to rediscover the 13 types of soundscapes and their corresponding spaces in the Bianjing City,the capital of the Northern Song Dynasty,and it reveals the causes and historical-cultural significance of these *** on the key issues of soundscapes,this paper analyzes the sound spaces,identities,discourses,and literary achievements depicted in the writings about *** argues that the“Bianjing Spectacle”of vendors’cries described by the Southern Song people can be used as a summary of the soundscape characteristics of ***,it interprets the special silence,crying,and the absence of the sounds of production from an aesthetic *** rediscovering,analyzing,and interpreting the soundscapes of Bianjing,this paper reveals significant differences between the Tang and Song dynasties at the sound level and differentiates various“auditory communities.”It thereby demonstrates the portrayal of Bianjing in Song literature,addresses theoretical hot topics in literature and geography,and builds on Marx’s arguments to propose that a thorough understanding of history,the world,and ourselves requires an in depth study of the soundscapes in literature.

关键词： Song literature Bianjing in the Northern Song Dynasty soundscapes identities transformation during the Tang and Song dynasties

Oriental Reed Warblers do not abandon Common Cuckoo chicks during prolonged nestling periods

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Avian Research 2024年第3期 369-373页

作者： Hanlin Yan Huahua Zhao Haixia Luo longwu Wang Laikun Ma Wei Liang Ministry of Education Key Laboratory for Ecology of Tropical Islands Key Laboratory of Tropical Animal and Plant Ecology of Hainan Province College of Life Sciences Hainan Normal University School of Life Sciences Guizhou Normal University School of Life Sciences Hebei University Department of Biology and Food Science Hebei Normal University for Nationalities

The Oriental Reed Warbler(Acrocephalus orientalis) is one of the most commonly used hosts for the parasitic Common Cuckoo(Cuculus canorus). However, as hosts that feed unrelated parasitic nestlings may suffer extra reproductive costs, they may be less willing to care for nestlings that have prolonged nestling periods. To test this hypothesis, the duration of feeding by Oriental Reed Warblers under natural conditions for their own nestlings was compared with the duration of feeding under natural conditions for Common Cuckoo nestlings and for artificially prolonged cuckoo nestlings. The results showed that Oriental Reed Warblers did not starve, drive away, or desert any of the nestlings in the experiment, and neither parent was left alone. Our experimental study indicates that both Oriental Reed Warbler parents were willing to care for nestlings with a prolonged nestling period(up to 30 days, twice the average duration time that the Oriental Reed Warblers fed their own chicks in natural conditions). However, further experiments and observations are required in other host bird species to examine whether both parents or one of the parents may exhibit the behavior of abandoning nestlings with a prolonged nestling period.

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