检索结果-南通市图书馆

在线全文

学校读者我要写书评

暂无评论

胞葬与脑卒中的研究进展

中华神经医学杂志 2024年第1期23卷 89-94页

作者：蔺晓瑜杨佳蕾首都医科大学附属北京天坛医院神经病学中心国家神经系统疾病临床医学研究中心北京100070

脑卒中是一种高发病率、高致残率、高复发率的脑血管疾病。近年来研究发现,神经细胞死亡的清除过程,即细胞胞葬,在脑卒中的病理过程中起到关键作用。本文现围绕近年关于胞葬与脑卒中的研究进展进行综述,以期为脑卒中后神经保护与修复提... 详细信息

脑卒中是一种高发病率、高致残率、高复发率的脑血管疾病。近年来研究发现,神经细胞死亡的清除过程,即细胞胞葬,在脑卒中的病理过程中起到关键作用。本文现围绕近年关于胞葬与脑卒中的研究进展进行综述,以期为脑卒中后神经保护与修复提供新思路。

关键词：脑卒中胞葬细胞死亡神经保护

困境未成年人保护人才队伍高质量发展研究——基于银川市A区的调查研究

在线全文

学校读者我要写书评

暂无评论

中国人事科学 2024年第4期 53-60页

作者：杨家磊宁夏大学铸牢中华民族共同体意识研究院(民族与历史学院)

困境未成年人保护工作一直是社会关注的焦点,其人才队伍的高质量发展成为保护工作提质增效的关键。对银川市A区困境未成年人保护人才队伍发展现状的调查表明,负责困境未成年人保护的工作人员以兼职为主,有相关学科背景的人员较少,专业... 详细信息

困境未成年人保护工作一直是社会关注的焦点,其人才队伍的高质量发展成为保护工作提质增效的关键。对银川市A区困境未成年人保护人才队伍发展现状的调查表明,负责困境未成年人保护的工作人员以兼职为主,有相关学科背景的人员较少,专业素养有待提高,且考核机制不完整、不全面并缺少准确的反馈机制,绩效激励力度和效果不够明显,对儿童主任、儿童督导员开展困境未成年人保护工作的积极性产生了一定影响。促进困境未成年人保护人才队伍建设,应探索常态化、机制化的培养模式,开展包含基础知识、政策执行、信息管理、动态跟踪、课外拓展等内容的专业培训,全面提升人才队伍的专业素养。以绩效评价体系为引领,立足人才队伍需求,全方位考量工作成效,让人才主动要求进步,实现困境未成年人保护工作和人才队伍的双向高质量发展。

关键词：人才队伍专业培训激励机制评价机制

在线全文

学校读者我要写书评

暂无评论

《世医得效方》中消渴病用药规律探讨

陕西中医 2024年第9期45卷 1274-1277页

作者：杨家蕾孙晔首都医科大学附属北京天坛医院北京100070 北京市平谷区中医医院北京101200

目的:利用数据挖掘技术,深入分析《世医得效方》中所记载方剂治疗消渴的用药规律。方法:归纳《世医得效方》中治疗消渴所记载的方剂,利用Excel 2016软件及中医传承辅助平台(V2.5)软件创建消渴处方及中药数据库,采用数据挖掘技术,对中药... 详细信息

目的:利用数据挖掘技术,深入分析《世医得效方》中所记载方剂治疗消渴的用药规律。方法:归纳《世医得效方》中治疗消渴所记载的方剂,利用Excel 2016软件及中医传承辅助平台(V2.5)软件创建消渴处方及中药数据库,采用数据挖掘技术,对中药频次、属性、功效进行统计分析,并对其进行关联分析、聚类分析。结果:《世医得效方》中用于治疗消渴的处方共50首,包含中草药118味;排名前4味的高频药物是人参、白茯苓、黄连、天花粉;药性以寒性为主,药味以甘味为主,主归脾经;且补虚药出现频次最高。高频用药配伍模式共7组,其中频次排名前4组依次为人参-白茯苓,五味子-白茯苓,麦冬-人参,人参-甘草。置信度≥0.6的药物关联规则按频度大小排列依次为麦冬→人参,五味子→熟地黄,熟地黄→五味子,五味子→人参等。基于无监督的熵层次聚类算法共获得4个治疗消渴的潜在新方组合,分别为麝香-山药-茯苓-辰砂,菟丝子-石斛-鹿角胶-沉香,黄芪-远志-茯苓-辰砂,麝香-木香-桔梗-茯苓-辰砂。结论:通过对《世医得效方》消渴处方用药规律进行分析,发现消渴病遵循阴虚为本,燥热为标的基本病机,治疗以甘寒养阴为主,兼顾健脾补肾、益肺生津等,配伍药物以补虚药、清热药等为主,能为现代临床合理、有效用药提供理论借鉴。

关键词：《世医得效方》数据挖掘消渴中医药用药规律中医传承辅助平台

干热环境下钢纤维-水泥基材料增强增韧效果影响研究

在线全文

学校读者我要写书评

暂无评论

混凝土 2024年第1期 110-115页

作者：杨家雷周崇旭李贺龙谢文邹烽李嘹崔圣爱中核华辰建筑工程有限公司陕西西安712000 西南交通大学土木工程学院四川成都610031

为了研究干热环境下钢纤维对水泥基材料的增强增韧效果,以高地温隧道干热环境为背景,通过调研将隧道的围岩温度分为4个等级(40℃、60℃、80℃和100℃)并设置相应的模拟环境,通过力学性能试验研究不同干热环境对水泥砂浆强度、钢纤维与... 详细信息

为了研究干热环境下钢纤维对水泥基材料的增强增韧效果,以高地温隧道干热环境为背景,通过调研将隧道的围岩温度分为4个等级(40℃、60℃、80℃和100℃)并设置相应的模拟环境,通过力学性能试验研究不同干热环境对水泥砂浆强度、钢纤维与水泥砂浆界面黏结性和钢纤维拔出功的影响,分析干热环境的劣化机理,最后通过钢纤维混凝土断裂性能试验进行对比验证。主要得到结论:(1)干热环境在早期有利于水泥砂浆抗压强度及钢纤维与水泥砂浆界面黏结强度的增长。7 d龄期以后,干热环境下水泥砂浆抗压强度及钢纤维与水泥砂浆界面黏结强度明显低于标准养护环境,下降的程度与温度呈正相关。(2)干热环境下的钢纤维-水泥砂浆的拔出功大于标准养护条件下的拔出功,表明干热环境可以提高钢纤维的增韧效果,但是温度过高钢纤维的增韧效果下降。(3)随着温度的升高钢纤维-混凝土试件的断裂能均呈现先增大后减小的趋势,且断裂能在60℃时出现最大值。

关键词：围岩温度干热环境黏结强度纤维拔出功断裂能

Heterogeneous integration of 2D materials on Si charge-coupled devices as optical memory

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2024年第6期67卷 190-197页

作者： Zheng BIAN Feng TIAN Zongwen LI Xiangwei SU Tianjiao ZHANG jialei MIAO Bin YU yang XU Yuda ZHAO College of Integrated Circuits Hangzhou Global Scientific and Technological Innovation CentreZhejiang University

Optical memory integrates the function of optical sensing in memory devices, remarkably promoting the interconnection between sensory and memory terminals. Silicon charge-coupled photodetectors and floating gate memory have been widely used in imaging and storage technologies, respectively. However,the heterogeneous integration of the two devices requires technological innovation and complex electrical connections. In this work, we adopt a three-dimensional layer stacking method to design a novel optical memory device. On the top of Si charge-coupled photodetectors, we successively deposit two-dimensional graphene,hexagonal boron nitride, and molybdenum disulfide as a floating gate layer, a tunneling layer, and a readout layer, respectively. By applying a gate bias on lightly doped Si, a deep depletion layer is formed with a high voltage potential drop. Under dark conditions, the depletion layer cannot be filled, and the electric field across the h-BN tunnel barrier is relatively small. Under light irradiation, the deep depletion layer is gradually filled, and the h-BN tunneling layer withstands the increasing electric field, resulting in charge storage in the floating gate layer. Based on this mechanism, the device exhibits a gate voltage-dependent operation mode, including an integrated optical sensing-memory mode and an electrically driven storage mode. Under moderate gate voltage, the device can effectively detect the optical information with varied intensity and store the optical information in the floating gate, displaying optically controlled memory characteristics. Our work demonstrates a compact device structure for optical memory and displays excellent optically controlled memory performance, which can be applied in artificial vision systems.

关键词： heterogeneous integration charge-coupled device floating gate optical memory molybdenum disulfide lightly doped silicon

ATI: Assemble topological interaction overcomes consistency– cohesion trade‐off in bird flocking

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

IET Cyber-Systems and Robotics 2024年第2期6卷 67-80页

作者： jialei Huang Bo Zhu Tianjiang Hu School of Aeronautics and Astronautics Sun Yatsen UniversityGuangzhouChina School of Artificial Intelligence Sun Yat‐sen UniversityGuangzhouChina

In nature,various animal groups like bird flocks display proficient collective navigation achieved by maintaining high consistency and cohesion *** metric and topological interactions have been explored to ensure high consistency among *** topological interactions found in bird flocks are more cohesive than metric in-teractions against external perturbations,especially the spatially balanced topological interaction(SBTI).However,it is revealed that in complex environments,pursuing cohesion via existing interactions compromises *** authors introduce an innovative solution,assemble topological interaction,to address this ***-trasting with static interaction rules,the new interaction empowers individuals with self-awareness to adapt to the complex environment by switching between interactions through visual *** individuals employ high-consistency k-nearest topological interaction when not facing splitting *** the presence of such threats,some switch to the high-cohesion SBTI to avert *** assemble topological interaction thus transcends the limit of the trade-off between consistency and *** addition,by comparing groups with varying degrees of these two features,the authors demonstrate that group effects are vital for efficient navigation led by a minority of informed ***,the real-world drone-swarm experiments validate the applicability of the proposed interaction to artificial robotic collectives.

关键词： assemble topological interaction bio-inspired robotics collective navigation flying robots swarm intelligence

Temporal variability of global potential water erosion based on an improved USLE model

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

International Soil and Water Conservation Research 2024年第1期12卷 1-12页

作者： jialei Li Muqi Xiong Ranhao Sun Liding Chen State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing100085China University of Chinese Academy of Sciences Beijing100049China Key Laboratory of Water Cycle and Related Land Surface Processes Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing100101China

Assessing spatiotemporal variation in global soil erosion is essential for identifying areas that require greater attention and management under the effects of anthropogenic activities and climate *** erosion can be modelled using the universal soil loss equation(USLE),which includes rainfall erosivity(R-factor),vegetation cover(C-factor),topography(LS-factor),soil erodibility(K-factor),and management practices(P-factor).However,global soil erosion modeling faces numerous challenges,including data acquisition,calculation processes,and parameter calibration under different climatic and topographic ***,we presented an improved USLE-based model using highly distributed *** R-,C-,and P-factors were modified by the climate zone,country,and *** distributed model was applied to estimate the intensity and variations in global soil erosion from 1992 to *** validated the accuracy of this model by comparing simulations with measurements from 11,439 plot years of erosion *** results showed that i)the average global erosion rate was 5.78 t ha^(-1)year^(-1),with an increase rate of 4.26×10^(-3)t ha^(-1)year^(-1);ii)areas with significantly increasing erosion accounted for 16%of the land with water erosion,whereas those with significantly decreasing erosion accounted for 7%;and iii)areas with severe erosion included the western Ghats,Abyssinian Plateau,Brazilian Plateau,south and east of the Himalayas,and western coast of South *** erosion occurred mainly on the Amazon Plain and the northern coast of the *** study provides an improved water erosion prediction model and accurate information for researchers and policymakers to identify the drivers underlying changes in water erosion in different regions.

关键词： Soil erosion Distributed USLE model Rainfall erosivity Soil conservation Global change

General and specialized metabolites in peanut roots regulate arbuscular mycorrhizal symbiosis

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

Journal of Integrative Agriculture 2024年第8期23卷 2618-2632页

作者： Li Cui Jianguo Wang Zhaohui Tang Zheng Zhang Sha yang Feng Guo Xinguo Li Jingjing Meng jialei Zhang Yakov Kuzyakov Shubo Wan Institute of Crop Germplasm Resources Shandong Academy of Agricultural Sciences/Scientific Observing and Experimental Station of Crop Cultivation in East ChinaMinistry of Agriculture and Rural AffairsJinan 250100China Shandong Academy of Agricultural Sciences Jinan 250100China Department of Soil Science of Temperate Ecosystems Department of Agricultural Soil ScienceUniversity of GöttingenGöttingen 37077Germany Peoples Friendship University of Russia(RUDN University) Miklukho-Maklaya StMoscow 117198Russia Institute of Environmental Sciences Kazan Federal University420049 KazanRussia

Arbuscular mycorrhizae(AM)fungi form symbiotic associations with plant roots,providing nutritional benefits and promoting plant growth and defenses against various *** changes in the roots during AM fungal colonization are key to understanding the development and maintenance of these ***,we investigated metabolic changes in the roots of peanut(Arachis hypogaea L.)plants during the colonization and development of AM symbiosis,and compared them to uncolonized *** primary changes during the initial stage of AM colonization were in the contents and compositions of phenylpropanoid and flavonoid *** compounds function in signaling pathways that regulate recognition,interactions,and pre-colonization between roots and AM *** compounds decreased by 25%when the symbiosis was fully established compared to the initial colonization *** AM symbiosis was established,general metabolism strongly shifted toward the formation of lipids,amino acids,carboxylic acids,and *** compounds increased by 8.5%from the pre-symbiotic stage to well-established ***-phosphatidylcholines,which are signaling compounds,were only present in AM roots,and decreased in content after the symbiosis was *** the initial stage of AM establishment,the content of salicylic acid increased two-fold,whereas jasmonic acid and abscisic acid decreased compared to uncolonized *** jasmonic acid content decreased in roots after the symbiosis was well *** symbiosis was associated with high levels of calcium,magnesium,and D-(+)-mannose,which stimulated seedling ***,specific metabolites that favor the establishment of AM symbiosis were common in the roots,primarily during early colonization,whereas general metabolism was strongly altered when AM symbiosis was *** conclusion,specialized metabolites function as signaling compounds to establish AM *** compounds are no longe

关键词： Arachis hypogaea L. arbuscular mycorrhizae fungi metabolites symbiotic association

Decoupled water electrolysis:Flexible strategy for pure hydrogen production with small voltage inputs

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2024年第7期94卷 340-356页

作者： Kexin Zhou Jiahui Huang Daili Xiang Aijiao Deng jialei Du Hong Liu Institute for Advanced Interdisciplinary Research(iAIR) Collaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Therapy in Universities of ShandongUniversity of JinanJinan 250022ShandongChina State Key Laboratory of Crystal Materials Shandong UniversityJinan 250100ShandongChina Zhengzhou Vocational College of Industrial Safety Zhengzhou 451192HenanChina

Hydrogen gas is widely regarded as an ideal green energy carrier and a potential alternative to fossil fuels for coping with the aggravating energy crisis and environmental ***,the vast majority of the world's hydrogen is produced by reforming fossil fuels;however,this hydrogen-making technology is not sustainable or environmentally friendly because ofits high energy consumption and large carbon ***-driven water splitting(2H_(2)0-2H_(2)+0_(2))becomes an extensively studied scheme for sustain-able hydrogen *** water electrolysis requires an input voltage higher than 1.23 V and forms a gas mixture of H_(2)/O_(2),which results in high electricity consumption,potential safety hazards,and harmful reactive oxygen *** virtue of the auxiliary redox mediators(RMs)as the robust H^(+)/e^(-)reservoir,decoupled electrolysis splits water at a much lower potential and evolves O_(2)(H_(2)O+RMS_(ox)-O_(2)+H-RMS_(red))and H_(2)(H-RMS_(red)-H_(2)+RMS_(ox))at separate times,rates,and spaces,thus pro-ducing the puretarget hydrogen gas *** electrolysis has accelerated the development ofwater electrolysis technology for H_(2) ***,itis still lack of a comprehensive and in-depth review in this field based on different types of *** review highlights the basic principles and critical progress of this emerging water electrolysis mode over the past *** representative examples are then dis-played in detail according to the differences in the *** rational choice and design of RMs have also been ***,novel applications of decoupled water splitting are briefly discussed,including the manufacture of valuable chemicals,Cl_(2) production,pollutant degradation,and other half-reactions in artificial ***,thekey characteristics and disadvantages of each type of mediator are sum-marized in *** addition,we present an outlook for future directions in decoupled

关键词： Hydrogen production Conventional water splitting Decoupled water splitting Redox mediators Biomimetics