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基于萘环稠合策略构筑间位双硼类纯绿光窄光谱发光材料

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Science China Materials 2024年第5期67卷 1581-1587页

作者：李祯龙李治张硕刘旻昊高戈游劲松宾正杨 Key Laboratory of Green Chemistry and Technology of Ministry of Education College of ChemistrySichuan UniversityChengdu610064China

硼氮多重共振(MR)发光材料在宽色域有机发光二极管(OLEDs)中具有重要应用前景,因此受到广泛关注.其中,间位双硼骨架凭借其高效率和极窄的发光光谱,在蓝光发光材料的构筑中已展现出独特优势,但如何基于间位双硼骨架构筑绿光窄光谱发光分... 详细信息

硼氮多重共振(MR)发光材料在宽色域有机发光二极管(OLEDs)中具有重要应用前景,因此受到广泛关注.其中,间位双硼骨架凭借其高效率和极窄的发光光谱,在蓝光发光材料的构筑中已展现出独特优势,但如何基于间位双硼骨架构筑绿光窄光谱发光分子却鲜有报道.本论文基于萘环稠合策略设计并合成了绿光发光分子BN-NAP和BNANAP,其最大发射峰分别为511和518 nm,并保持了窄光谱发光性质,其发光半峰宽(FWHM)仅为26和20 nm.利用BN-ANAP作为发光材料制备得到纯绿光OLED器件,其CIE坐标为[026,067],最大外量子效率(EQEmax)为21.0%,同时具有较小的效率滚降.

关键词： multiple resonance narrowband emitter pure-green emission organic light-emitting diodes

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依托“大创”项目培养医学本科生的科研能力

科教导刊 2024年第22期 8-11页

作者：李振龙遵义医科大学珠海校区基础教学部广东珠海519041

科研能力的培养是医学院校本科教育的重要目标之一,传统医学教育模式以理论和临床实践为主,忽视了对医学本科生科研能力的培养。文章基于“大创”项目的医学本科生科研能力培养模式,探讨了如何通过“大创”项目培养医学本科生的科研能力... 详细信息

科研能力的培养是医学院校本科教育的重要目标之一,传统医学教育模式以理论和临床实践为主,忽视了对医学本科生科研能力的培养。文章基于“大创”项目的医学本科生科研能力培养模式,探讨了如何通过“大创”项目培养医学本科生的科研能力,并针对出现的问题提出了相关建议。实践证明,该培养模式可以有效地帮助学生掌握科学方法,形成科学思维,为培养具有科研创新能力的医学人才提供参考。

关键词：大创项目科研能力医学本科生

Optimization for Micro-energy Grid Dispatch Based on Non-supplementary Fired Compressed Air Energy Storage Aided Energy Hub and Hybrid Hyper-spherical Search

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Journal of Modern Power Systems and Clean Energy 2022年第4期10卷 1009-1020页

作者： zhenlong li Peng li Jing Xia Xiangqian liu Beijing Jiaotong University BeijingChina State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power UniversityBeijingChina Beijing Goldwind Science&Creation Wind Power Equipment Co. Ltd.BeijingChina

Micro-energy grids have shown superiorities over traditional electricity and heating management *** paper presents a hybrid optimization strategy for micro-energy grid dispatch with three salient ***,to enhance the ability to support new storage equipment,an energy hub model is proposed using the non-supplementary fired compressed air energy storage(NSF-CAES).This provides flexible dispatch for cooling,heating and ***,considering the unique characteristics of the NSF-CAES,a sliding time window(STW)method is designed for simple but effective energy ***,for the optimization of energy dispatch,we blend the differential evolution(DE)with the hyper-spherical search(HSS)to formulate a hybrid DE-HSS algorithm,which enhances the global search ability and *** case studies are performed using real data of scenarios to demonstrate the superiorities of the proposed scheme.

关键词： Energy hub dispatch hyper-spherical search micro-energy grid sliding time window

面向智能交通人才培养的综合数字化沙盘平台路网设计

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实验技术与管理 2024年第7期41卷 222-228页

作者：李海舰赵晓华李振龙王威杰北京工业大学交通工程北京市重点实验室北京100124

为了更好地服务实训平台建设和智能交通人才培养,该文从路网设计方法、适应未来智能交通发展和智能交通人才培养需求出发,提出了多样化路网设计方案。根据多维度特性评价指标对比分析多样化路网设计方案,以期为面向实践教学、科研、展... 详细信息

为了更好地服务实训平台建设和智能交通人才培养,该文从路网设计方法、适应未来智能交通发展和智能交通人才培养需求出发,提出了多样化路网设计方案。根据多维度特性评价指标对比分析多样化路网设计方案,以期为面向实践教学、科研、展示等实训平台路网设计与选择提供指导和借鉴,增加实训平台路网与真实道路条件之间的高仿真度效果,提高基于实训平台路网的科研、实训及展示应用效果,实现智能交通人才的培养目标。

关键词：实践教学数字化沙盘平台智能交通人才培养路网设计

A geospatial hybrid cloud platform based on multi-sourced computing and model resources for geosciences

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International Journal of Digital Earth 2018年第12期11卷 1184-1204页

作者： Qunying Huang Jing li zhenlong li Department of Geography University of Wisconsin–MadisonMadisonWIUSA Department of Geography and the Environment University of DenverDenverCOUSA Department of Geography University of South CarolinaColumbiaSCUSA

Cloud computing has been considered as the next-generation computing platform with the potential to address the data and computing challenges in ***,only a limited number of geoscientists have been adapting this platform for their scientific research mainly due to two barriers:1)selecting an appropriate cloud platform for a specific application could be challenging,as various cloud services are available and 2)existing general cloud platforms are not designed to support geoscience applications,algorithms and *** tackle such barriers,this research aims to design a hybrid cloud computing(HCC)platform that can utilize and integrate the computing resources across different organizations to build a unified geospatial cloud computing *** platform can manage different types of underlying cloud infrastructure(e.g.,private or public clouds),and enables geoscientists to test and leverage the cloud capabilities through a web ***,the platform also provides different geospatial cloud services,such as workflow as a service,on the top of common cloud services(e.g.,infrastructure as a service)provided by general cloud ***,geoscientists can easily create a model workflow by recruiting the needed models for a geospatial application or task on the fly.A HCC prototype is developed and dust storm simulation is used to demonstrate the capability and feasibility of such platform in facilitating geosciences by leveraging across-organization computing and model resources.

关键词： Cloud computing Big Data geospatial cloud services workflow as a service(WaaS) geoprocessing as a service(GaaS) model as a service(MaaS) high-performance computing parallel computing

A general-purpose framework for parallel processing of large-scale liDAR data

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International Journal of Digital Earth 2018年第1期11卷 26-47页

作者： zhenlong li Michael E.Hodgson Wenwen li Department of Geography University of South CarolinaColumbiaSCUSA School of Geographical Sciences and Urban Planning Arizona State UniversityTempeAZUSA

light detection and ranging(liDAR)data are essential for scientific discoveries such as Earth and ecological sciences,environmental applications,and responding to natural *** collecting liDAR data over large areas is quite possible the subsequent processing steps typically involve large computational *** storing,managing,and processing liDAR data are the prerequisite steps for enabling these liDAR-based ***,handling liDAR data poses grand geoprocessing challenges due to data and computational *** tackle such challenges,we developed a general-purpose scalable framework coupled with a sophisticated data decomposition and parallelization strategy to efficiently handle‘big’liDAR data *** contributions of this research were(1)a tile-based spatial index to manage big liDAR data in the scalable and fault-tolerable Hadoop distributed file system,(2)two spatial decomposition techniques to enable efficient parallelization of different types of liDAR processing tasks,and(3)by coupling existing liDAR processing tools with Hadoop,a variety of liDAR data processing tasks can be conducted in parallel in a highly scalable distributed computing environment using an online geoprocessing application.A proof-of-concept prototype is presented here to demonstrate the feasibility,performance,and scalability of the proposed framework.

关键词： Big data online geoprocessing Hadoop MapReduce spatial decomposition LAStools parallel

Antibacterial conductive self-healable supramolecular hydrogel dressing for infected motional wound healing

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Science China Chemistry 2022年第11期65卷 2238-2251页

作者： Rui Yu zhenlong li Guoying Pan Baolin Guo Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research College of StomatologyXi’an Jiaotong UniversityXi'an 710049China State Key Laboratory for Mechanical Behavior of Materials Frontier Institute of Science and TechnologyXi’an Jiaotong UniversityXi'an710049China

Wounds on stretchable parts of the human body cause prolonged suffering and involve more severe healing processes than wounds on stationary parts. However, they have received insufficient attention compared with other types of chronic wounds. In this study, a novel supramolecular gelatin(GT) hydrogel composed of GT-graft-aniline tetramer and quaternized chitosan was presented. The hydrogel was crosslinked by monoaldehyde β-cyclodextrin via host-guest interaction and dynamic Schiff base and was free from permanent covalent bonds, heavy metals, and oxidants. Given its dynamic feature, the hydrogel exhibited flexibility, self-healing, and tissue adhesiveness and well adapted to motion wounds. Moreover, the hydrogel was bioactive with conductivity, antioxidant property, hemostatic effect, antibacterial, and photothermal effect(the killing ratio for methicillinresistant Staphylococcus aureus(MRSA) was higher than 99.8% after 5 min of near-infrared irradiation) and exhibited ondemand removability. In the full-thickness MRSA-infected motional wound healing experiment, this novel hydrogel exhibited a significantly enhanced wound healing efficacy with a fast wound closure ratio(about 99.0% for 14 days), mild inflammatory response, high level of collagen deposition, and enhanced re-epithelialization by downregulating interleukin-6 and CD68 and upregulating vascular endothelial growth factor. The results indicated that this hydrogel has great potential in wound healing and skin tissue engineering and serves as an inspiration for the design of supramolecular biomaterials.

关键词： supramolecular hydrogel self-healing tissue adhesion joint wound

Bioinspired Injectable Self-Healing Hydrogel Sealant with Fault-Tolerant and Repeated Thermo-Responsive Adhesion for Sutureless Post-Wound-Closure and Wound Healing

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Nano-Micro Letters 2022年第11期14卷 256-274页

作者： Yuqing liang Huiru Xu zhenlong li Aodi Zhangji Baolin Guo State Key Laboratory for Mechanical Behavior of Materials and Frontier Institute of Science and TechnologyXi’an Jiaotong UniversityXi’an 710049People’s Republic of China Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research College of StomatologyXi’an Jiaotong UniversityXi’an 710049People’s Republic of China

Hydrogels with multifunctionalities,including sufficient bonding strength,injectability and self-healing capacity,responsive-adhesive ability,fault-tolerant and repeated tissue adhesion,are urgently demanded for invasive wound closure and wound *** by the adhesive mechanism of mussel and brown algae,bioinspired dynamic bonds cross-linked multifunctional hydrogel adhesive is designed based on sodium alginate(SA),gelatin(GT)and protocatechualdehyde,with ferric ions added,for sutureless *** dynamic hydrogel cross-linked through Schiff base bond,catechol-Fe coordinate bond and the strong interaction between GT with temperature-dependent phase transition and SA,endows the resulting hydrogel with sufficient mechanical and adhesive strength for efficient wound closure,injectability and self-healing capacity,and repeated closure of reopened ***,the temperature-dependent adhesive properties endowed mispositioning hydrogel to be removed/repositioned,which is conducive for the fault-tolerant adhesion of the hydrogel adhesives during ***,the hydrogels present good biocompatibility,near-infrared-assisted photothermal antibacterial activity,antioxidation and repeated thermo-responsive reversible adhesion and good hemostatic *** in vivo incision closure evaluation demonstrated their capability to promote the post-wound-closure and wound healing of the incisions,indicating that the developed reversible adhesive hydrogel dressing could serve as versatile tissue sealant.

关键词： Bioinspired injectable hydrogel Tissue sealant Temperature-dependent adhesion Reversible adhesion Wound healing

A visual-textual fused approach to automated tagging of flood-related tweets during a flood event

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International Journal of Digital Earth 2019年第11期12卷 1248-1264页

作者： Xiao Huang Cuizhen Wang zhenlong li Huan Ning Department of Geography University of South CarolinaColumbiaSCUSA

In recent years,social media such as Twitter have received much attention as a new data source for rapid flood *** timely response and large coverage provided by citizen sensors significantly compensate the limitations of non-timely remote sensing data and spatially isolated river ***,automatic extraction of flood tweets from a massive tweets pool remains a *** the Houston Flood in 2017 as a study case,this paper presents an automated flood tweets extraction approach by mining both visual and textual information a tweet contains.A CNN architecture was designed to classify the visual content of flood pictures during the Houston Flood.A sensitivity test was then applied to extract flood-sensitive keywords that were further used to refine the CNN classified results.A duplication test was finally performed to trim the database by removing the duplicated pictures to create the flood tweets pool for the flood *** results indicated that coupling CNN classification results with flood-sensitive words in tweets allows a significant increase in precision while keeps the recall rate in a high *** elimination of tweets containing duplicated pictures greatly contributes to higher spatio-temporal relevance to the flood.

关键词： Data mining flood social media CNN tweets geotagging