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Polyphenol-mediated construction of highly stable and bioactive selenium nanoparticles

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Biosurface and Biotribology 2023年第4期9卷 151-160页

作者： Rong Hu Xiao Wang Lu Han xiong Lu School of Materials Science and Engineering Key Lab of Advanced Technologies of MaterialsMinistry of EducationSouthwest Jiaotong UniversityChengduSichuanChina Key Laboratory of Marine Drugs Ministry of EducationSchool of Medicine and PharmaceuticsOcean University of ChinaQingdaoShandongChina Institute of Biomedical Engineering College of MedicineSouthwest Jiaotong UniversityChengduSichuanChina

Selenium(Se),a well-known essential element in human health,plays a vital role in regulating metabolism owing to its antioxidative ***,organic Se compounds are toxic and cannot be used for biomedical *** nanoparticles(SeNPs)exhibit low biological toxicity and high bioavailability;however,they are prone to ag-gregation and are extremely unstable,thereby diminishing their bioactivity and *** overcome these limitations,ultra-small,highly stable,and bioactive SeNPs were synthesised based on an in-situ hybridisation strategy by using polyphenol-grafted-chitosan(GA-CS)to control and restrict crystal growth of Se *** resul-tant GA-CS@nSe exhibited an average particle size of~30 nm and was highly stable in aqueous *** addition,GA-CS@nSe displayed improved biocompatibility and enhanced antioxidative *** together,the authors provide a basis for polyphenol-mediated construction of Se-based particles with increased bioactivity.

关键词： bioactivity biomaterials

The recent research progress of polyphenol-derived biomaterials in wound repair

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Biosurface and Biotribology 2023年第4期9卷 114-128页

作者： Shuya Zhao Lu Han Liwei Yan xiong Lu Institute of Biomedical Engineering College of MedicineSouthwest Jiaotong UniversityChengduSichuanChina Key Laboratory of Advanced Technologies of Materials Ministry of EducationSchool of Materials Science and EngineeringSouthwest Jiaotong UniversityChengduSichuanChina School of Medicine and Pharmaceutics Key Laboratory of Marine DrugsMinistry of EducationOcean University of ChinaQingdaoShandongChina

The clinical requirements for wound care are increasing daily, and the global wound dressing market is expanding;however, the research and development of new wound dressings are imminent. Natural biomolecules such as polyphenols, have been widely used in this field of vision. Owing to their unique anti-oxidative, adhesive, antibacterial and other bioactive functions, researchers have developed a series of wound dressings with excellent performance and applied them to a variety of biomaterials, such as hydrogels, nanofibers, films and scaffolds. They can effectively promote angiogenesis and fibroblast migration and proliferation, scavenge active oxygen free radicals, inhibit excessive in-flammatory reactions at wound sites and ultimately accelerate wound healing. The authors summarise the latest progress in polyphenol-derived biomaterials in skin wound repair to provide inspiration for future wound dressing research.

关键词： biomaterials biomedical application injectable hydrogels physically cross-linked gel polydopamine wound healing

Multifunctional hydrogels for chronic wounds repairing

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Biosurface and Biotribology 2023年第4期9卷 85-100页

作者： Xiao Wang Rong Hu Lu Han xiong Lu School of Materials Science and Engineering Key Lab of Advanced Technologies of MaterialsMinistry of EducationSouthwest Jiaotong UniversityChengduChina Institute of Biomedical Engineering College of MedicineSouthwest Jiaotong UniversityChengduChina Key Laboratory of Marine Drugs Ministry of EducationSchool of Medicine and PharmaceuticsOcean University of ChinaQingdaoChina

Because of their tissue-like mechanical performances,high biocompatibility,and adjust-able functionality,hydrogels have become increasingly attractive materials for promoting wound *** wounds include burn,diabetic,and infected *** common incision wounds,chronic wounds are more challenging to *** meet the clinical needs,multifunctional hydrogels should be fabricated and *** guide future studies on the fabrication of hydrogel-based chronic wound dressings,a review of advanced multifunctional hydrogels is *** hydrogels with advanced properties,such as antibacterial,antioxidant,bioadhesive,anti-inflammatory,and wound healing properties,that can be used for skin burn wounds and diabetic wounds are ***,the prospects of advanced hydrogels for wound healing are elaborated.

关键词： adhesive property antibacterial biomaterials biomedical application functionalisation wound healing

基于高频信号注入的同步磁阻电机无位置传感器控制

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水电能源科学 2024年第6期42卷 211-216页

作者：马一飞熊立新张国伟边敦新山东理工大学电气与电子工程学院山东淄博255049 山东科汇电力自动化股份有限公司山东淄博255087

针对同步磁阻电机定子电感具有电磁饱和、交叉耦合等特点带来的电机参数非线性问题,提出了一种递推最小二乘法与脉振高频电流信号注入相结合的无位置传感器控制方法,其原理是将幅值固定的高频正弦电流信号注入到同步磁阻电机观测坐标系... 详细信息

针对同步磁阻电机定子电感具有电磁饱和、交叉耦合等特点带来的电机参数非线性问题,提出了一种递推最小二乘法与脉振高频电流信号注入相结合的无位置传感器控制方法,其原理是将幅值固定的高频正弦电流信号注入到同步磁阻电机观测坐标系直轴内,在交轴提取含有转子位置信息的电压信号,采用带遗忘因子的递推最小二乘法进行电机电阻与电感参数的在线辨识,可实现电机的无位置传感器控制。仿真与台架试验验证了所提方法的准确性与实用性。

关键词：同步磁阻电机脉振高频电流注入法无位置传感器控制参数辨识

Revisiting the dependence of thermocline-dwelling foraminiferal B/Ca on temperature and [CO32-], and its application in reconstruction of the subsurface carbonate system in the tropical western Pacific since 24 ka

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Acta Oceanologica Sinica 2019年第9期38卷 71-86页

作者： Jingteng Guo Tiegang Li Zhifang xiong Xiaohua Qiu Fengming Chang CAS Key Laboratory of Marine Geology and Environment Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China First Institute of Oceanography Ministry of Natural Resources Qingdao 266061 China university of Chinese Academy of Sciences Beijing 100049 China Laboratory for Marine Geology and Environment Pilot National Laboratory for Marine Science and Technology (Qingdao) Qingdao 266237 China No. 1 Institute of Geology and Mineral Resources of shandong Province Jinan 250014 China

The B/Ca ratio of planktonic foraminifer shells has been used as a proxy for reconstructing past ocean carbonate chemistry. However, recent studies have revealed significant uncertainties associated with this proxy, such as whether seawater temperature or [CO^2-3 ] is the dominant control on the partition coefficient (KD) of planktonic foraminiferal B/Ca. To address these uncertainties and thus improve our understanding of the planktonic foraminiferal B/Ca proxy, we analysed B/Ca ratios in the tests of Neogloboquadrina dutertrei (300- 355 μm) and Pulleniatina obliquiloculata (355- 400 μm) in surface sediment samples from the tropical western Pacific and South China Sea. The relationship between these B/Ca ratios and bottom water calcite saturation states (Δ[CO^2-3 ]) is weak, thus suggesting only a small dissolution effect on the B/Ca of the two species. The correlation coefficients (R2) between the B/Ca ratios of N. dutertrei and P. obliquiloculata and environmental parameters (e.g., temperature, salinity, phosphate, DIC and ALK) in the tropical western Pacific and South China Sea are not high enough to justify using B/Ca ratios as a palaeoenvironmental proxy in the study areas. The significant correlation between KD values of N. dutertrei and P. obliquiloculata and carbonate system parameters (e.g.,[CO^2-3 ], DIC, ALK, pH and [HCO^-3 ]) in the study area reflect chemical links between the KD denominator and these variables. Based on our surface sediment calibration, an empirical relationship between the KD of N. dutertrei and temperature is proposed in the tropical western Pacific. We also generated a record of B/Ca ratios in N. dutertrei (300 -355 μm) from Core MD06-3052 in the tropical western Pacific over the past 24 ka to evaluate the application of the revised B/Ca proxy method. Based on the reconstructed empirical relationship for B/Ca and subsurface seawater ALK, we estimated subsurface seawater carbonate system parameters in the tropical western Pacific si

关键词： planktonic foraminifera B/Ca carbonate chemistry tropical western Pacific South China Sea

Existence, morphology and structure of the Yellow Sea Warm Current Branch approaching waters offshore Qingdao, China

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Science China Earth Sciences 2019年第7期62卷 1167-1180页

作者： Xuejun xiong Xiaomin HU Yanliang GUO Long YU Liang CHEN Yuhuan XUE College of Oceanic and Atmospheric Sciences Ocean University of China First Institute of Oceanography Ministry of Natural Resources Laboratory for Regional Oceanography and Numerical Modeling Pilot National Laboratory for Marine Science and Technology (Qingdao)

In this study, we focused on full-region cruise survey data, near-bottom continuous mooring observations and sea surface wind products from the western South Yellow Sea in winter; after ensuring the data reliability and accuracy, we processed and analyzed the data. Image resolution experiments were carried out to determine the lowest recognition resolutions for all image types, which represent the resolution characteristics of the data. The existence of a warm water tongue originating from the Yellow Sea Warm Current(YSWC) that approached waters offshore Qingdao was confirmed. For the first time, a high salinity water tongue, corresponding to the warm water tongue, was described and found to be more representative of the YSWC branch path. This warm tongue is a sign of the branch originating from the YSWC, which we defined as the Yellow Sea Warm Current Branch approaching waters offshore Qingdao(YSWC-QDB). The pattern of the warm and salty water tongues showed remarkable rear, branching middle, shrinking neck and expanding top regions. These patterns showed a temporal feature of the tongues, and were the result of multi-temporal branches in front of the YSWC main section as well as the YSWC-QDB crossing the southwestward path of the extension of the North shandong Coastal Current flowing along the southeast coast of the shandong Peninsula(NSCC-SESE). Analysis using mooring data at a sensitive and representative station also showed the existence of the YSWC-QDB. It is a probabilistic event that manifests as a northwestward flow that decreases gradually from the bottom to the surface in the early cold air transit stage and consistent in the whole water column profile in the later stage. It varies quasi-periodically with weather processes. It also transports some of the YSWC water stored in the entrance area of the Bohai and Yellow seas under winter wind conditions to the western South Yellow Sea as a compensatory current. This current, caused by northerly winds, especi

关键词： Yellow Sea Warm Current Branch approaching waters offshore Qingdao (YSWC-QDB) High salinity water tongue Compensatory current Strong northwest wind Extension of the North shandong Coastal Current flowing along the southeast coast of the shandong Peninsula (NSCC-SESE) Existence confirmation Morphology Structure

基于DB-YOLO的双基地雷达弱运动目标检测方法

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太赫兹科学与电子信息学报 2024年第2期22卷 132-141页

作者：陆源宋杰熊伟陈小龙海军航空大学信息融合研究所山东烟台264001

非合作双基地雷达因其特殊的探测方式,致使回波中目标信噪比较低,特别是海上运动目标,在雷达扫描周期的帧与帧之间探测并不稳定,会对后续目标跟踪造成较大困难。本文首先采用低门限恒虚警率(CFAR)检测器将雷达距离-多普勒维和距离-方位... 详细信息

非合作双基地雷达因其特殊的探测方式,致使回波中目标信噪比较低,特别是海上运动目标,在雷达扫描周期的帧与帧之间探测并不稳定,会对后续目标跟踪造成较大困难。本文首先采用低门限恒虚警率(CFAR)检测器将雷达距离-多普勒维和距离-方位维的检测结果匹配,得到相应掩码图,筛选出潜在的运动目标;然后提出一种融合多维特征信息的双主干YOLO(DB-YOLO),该网络采用双主干结构,同时提取动目标掩码图和其映射下相同尺度P显图的特征,并采用深度可分离卷积模块降低网络的模型参数。将该模型与Faster RCNN、YOLOv5及其常见变种YOLOv5-ConvNeXt进行对比,实验表明,DB-YOLO有效提高了目标检测性能并保证了推理速度,为非合作双基地雷达的目标跟踪奠定了基础。

关键词：非合作双基地雷达目标检测双主干YOLO 特征融合

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Multidiscipline Applications of Triboelectric Nanogenerators for the Intelligent Era of Internet of Things

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Nano-Micro Letters 2023年第1期15卷 252-292页

作者： Xiaole Cao Yao xiong Jia Sun Xiaoyin Xie Qijun Sun Zhong Lin Wang Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of SciencesBeijing 101400People’s Republic of China School of Nanoscience and technology University of Chinese Academy of SciencesBeijing 100049People’s Republic of China School of Physics and Electronics Central South UniversityChangsha 410083People’s Republic of China School of Chemistry and Chemical Engineering Hubei Polytechnic UniversityHuangshi 435003People’s Republic of China shandong Zhongke Naneng Energy technology Co. Ltd.Dongying 7061People’s Republic of China School of Materials Science and Engineering Georgia Institute of TechnologyAtlantaGA 30332USA

In the era of 5G and the Internet of things(IoTs),vari-ous human-computer interaction systems based on the integration of triboelectric nanogenerators(TENGs)and IoTs technologies dem-onstrate the feasibility of sustainable and self-powered functional *** rapid development of intelligent applications of IoTs based on TENGs mainly relies on supplying the harvested mechanical energy from surroundings and implementing active sensing,which have greatly changed the way of human production and daily *** review mainly introduced the TENG applications in multidisci-pline scenarios of IoTs,including smart agriculture,smart industry,smart city,emergency monitoring,and machine learning-assisted artificial intelligence *** challenges and future research directions of TENG toward IoTs have also been *** exten-sive developments and applications of TENG will push forward the IoTs into an energy autonomy fashion.

关键词： Triboelectric nanogenerator Self-powered sensor Internet of things Artificial intelligence Machine learning

2023年度无机非金属材料学科基金项目评审工作综述

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中国科学基金 2024年第1期38卷 74-80页

作者：谭业强郭涛路大治李纪红熊攀苗鸿雁王岐东国家自然科学基金委员会工程与材料科学部北京100085 北京科技大学北京100083 山东大学济南250100 海南大学海口570228 南京理工大学南京210094

本文统计和分析了2023年度国家自然科学基金委员会工程与材料科学部无机非金属材料学科(E02)基金项目的申请、受理、评审和资助情况、二级代码分布情况及申请中存在的主要共性问题,总结了本学科加强基础研究举措及实施成效,并介绍了202... 详细信息

本文统计和分析了2023年度国家自然科学基金委员会工程与材料科学部无机非金属材料学科(E02)基金项目的申请、受理、评审和资助情况、二级代码分布情况及申请中存在的主要共性问题,总结了本学科加强基础研究举措及实施成效,并介绍了2024年学科优先资助领域、重点资助方向、申请注意事项及对未来工作的思考,旨在为广大科研人员了解该学科领域的资助现状、人才成长规律和未来发展方向提供参考。

关键词：国家自然科学基金委员会无机非金属材料学科项目评审加强基础研究举措工作思考