检索结果-南通市图书馆

Masting promotes transformation from predation to mutualism in an oak-weevil-rodent system

Science China(Life Sciences) 2024年第7期67卷 1514-1524页

作者： Hongmao Zhang Hongyu Niu Michael ASteele Liqing Peng huimin he Aoqiang Li Xianfeng Yi Hongjun Li Zhibin Zhang Institute of Evolution and Ecology School of Life SciencesCentral China Normal UniversityWuhan 430079China State Key Laboratory of Integrated Management of Pest Insects and Rodents in Agriculture Institute of ZoologyChinese Academy of SciencesBeijing 100101China Department of Biology Wilkes UniversityWilkes-Barre 18766USA School of Life Sciences Qufu Normal UniversityQufu 273165China

The significance of ecological non-monotonicity(a function whose first derivative changes signs)in shaping the structure and functions of the ecosystem has recently been recognized,but such studies involving high-order interactions are ***,we have proposed a threetrophic conceptual diagram on interactions among trees,rodents,and insects in mast and non-mast years and tested the hypothesis that oak(Quercus wutaishanica)masting could result in increased mutualism and less predation in an oak-weevil-rodent system in a warm temperate forest of *** 14-year dataset revealed that mast years coincided with a relatively low rodent abundance but a high weevil *** not only benefited seedling recruitment of oaks through increased dispersal by rodents but also a decrease in predation by rodents and weevils,as well as an increase in the overwintering survival of *** appeared to have increased weevil survival by reducing predation of infested acorns by *** results suggest that masting benefits all participants in the plant-insect-rodent system by increasing mutualism and reducing predation behavior(i.e.,a non-monotonic function).Our study highlights the significance of masting in maintaining the diversity and function of the forest ecosystem by facilitating the transformation from predation to mutualism among trophic species.

关键词： antagonism ecological non-monotonicity mutualism seed-weevil-rodent system seedling recruitment rodent overwintering survival weevil survival

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

学做教育家型教师:前提性追问、释义与实践路径

引用

当代教育论坛 2024年第2期 118-124页

作者：贺慧敏天津市教育科学研究院天津300191

学做教育家型教师是践行教育家精神的关键,是教师人才成长的路径之一。要引导新入职教师树立成为教育家型教师的职业意愿,分析出教育家型教师的精神内核和核心动力,即“教育爱”与“持续追求教育教学”优化。循证于此,构建新入职教师高... 详细信息

学做教育家型教师是践行教育家精神的关键,是教师人才成长的路径之一。要引导新入职教师树立成为教育家型教师的职业意愿,分析出教育家型教师的精神内核和核心动力,即“教育爱”与“持续追求教育教学”优化。循证于此,构建新入职教师高质量成长路径,即要以积极情感诠释职业价值,用仁爱情怀关照教育对象,在热爱情感中推进事业发展来实现教育爱;要通过保持开放式心态,对教育教学问题进行创新性阐述,积极主动超越现状、超越碎片化来实现教育教学优化,以此创新教师队伍素质提升的理念与路径,提高教师队伍建设质量。

关键词：教育家型教师教育爱教育教学优化学做新入职教师

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

巧用概率论方法求解积分问题

引用

高等数学研究 2024年第2期27卷 93-94,F0003页

作者：贺慧敏李萍范钦伟广州大学数学与信息科学学院广东广州510006 西安工程大学理学院陕西西安710048

本文讨论了概率论中密度函数的性质、随机变量的数学期望与方差及大数定律在积分计算中的应用.

关键词：密度函数数学期望方差大数定律积分

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

低成本高性能新型J422,J502焊条的研制

引用

焊接技术 2024年第4期53卷 112-115页

作者：邱玮杰贺顺达贺惠民谢宛霖邱葭菲杭州科技职业技术学院浙江杭州311402 湖南湘工环保科技有限公司湖南郴州423000 华南理工大学广东广州5100003 浙江机电职业技术学院浙江杭州310053

分析了普通J422与J502焊条的生产现状、技术状态及应用情况,提出了普通焊条有向高品质方向发展的需求,据此通过改变药皮配方,成功研制了新型J422与J502焊条。新型J422与J502焊条与普通J422与J502焊条相比,既具有同样良好的工艺性能,又... 详细信息

分析了普通J422与J502焊条的生产现状、技术状态及应用情况,提出了普通焊条有向高品质方向发展的需求,据此通过改变药皮配方,成功研制了新型J422与J502焊条。新型J422与J502焊条与普通J422与J502焊条相比,既具有同样良好的工艺性能,又较大幅度地提升了焊条的力学性能,还降低了成本,扩大了其使用范围,具有较大的经济效益和社会效益。

关键词：新型J422与J502焊条力学性能工艺性能

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

Advanced strategies in the application of gelatin-based bioink for extrusion bioprinting

引用

生物设计与制造(英文) 2023年第5期6卷 586-608页

作者： Jirong Yang huimin he Duo Li Qian Zhang Lizhi Xu Changshun Ruan Research Center for Human Tissue and Organs Degeneration Institute of Biomedicine and BiotechnologyShenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China Department of Mechanical Engineering The University of Hong KongHong Kong SARChina University of Chinese Academy of Sciences Beijing 100049China

The signiﬁcance of bioink suitability for the extrusion bioprinting of tissue-like constructs cannot be ***,derived from the hydrolysis of collagen,not only can mimic the extracellular matrix to immensely support cell function,but also is suitable for extrusion under certain ***,gelatin has been recognized as a promising bioink for extrusion ***,the development of a gelatin-based bioink with satisfactory printability and bioactivity to fabricate complex tissue-like constructs with the desired physicochemical properties and biofunctions for a speciﬁc biomedical application is still in its ***,in this review,we aim to comprehensively summarize the state-of-the-art methods of gelatin-based bioink application for extrusion ***ﬁrstly outline the properties and requirements of gelatin-based bioinks for extrusion bioprinting,highlighting the strategies to overcome their main limitations in terms of printability,structural stability and cell ***,the challenges and prospects are further discussed regarding the development of ideal gelatin-based bioinks for extrusion bioprinting to create complex tissue-like constructs with preferable physicochemical properties and biofunctions.

关键词： Gelatin-based bioink Extrusion bioprinting Tissue-like construct

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ROCCIPI框架的广西老龄事业发展问题识别及对策研究

引用

中国公共卫生管理 2024年第1期40卷 81-84页

作者：苏金婷谢琳艺何慧敏广西医科大学信息与管理学院广西南宁530000

人口老龄化背景下,利用ROCCIPI分析框架剖析广西老龄事业发展的机遇和挑战,针对老龄事业发展中老年群体养老健康需求评估制度不完善、专业人才匮乏、养老服务供给短缺、社会参与度不高等问题,从健全老龄政策、培育和发展新产业新技术、... 详细信息

人口老龄化背景下,利用ROCCIPI分析框架剖析广西老龄事业发展的机遇和挑战,针对老龄事业发展中老年群体养老健康需求评估制度不完善、专业人才匮乏、养老服务供给短缺、社会参与度不高等问题,从健全老龄政策、培育和发展新产业新技术、加快资源整合、优化老年友好型社会四个方面提出新时期广西老龄事业进一步发展的对策建议,以期在人口老龄化严重、经济不发达的双重压力下,为促进广西经济发展寻找新的突破口。

关键词：老龄事业 ROCCIPI分析框架问题识别广西

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

集成硅基转接板的PDN供电分析

引用

电子与封装 2024年第6期24卷 69-80页

作者：何慧敏廖成意刘丰满戴风伟曹睿中国科学院微电子研究所北京100029 华进半导体封装先导技术研发中心有限公司江苏无锡214135

集成硅转接板的2.5D/3D封装是实现Chiplet技术的重要封装方案。总结了传统电源分配网络(PDN)的供电机理,分析了先进封装下PDN存在的直流压降过大、路径电阻大等电源完整性问题,介绍了针对硅基转接板上PDN的等效电路建模方法,重点概述了2... 详细信息

集成硅转接板的2.5D/3D封装是实现Chiplet技术的重要封装方案。总结了传统电源分配网络(PDN)的供电机理,分析了先进封装下PDN存在的直流压降过大、路径电阻大等电源完整性问题,介绍了针对硅基转接板上PDN的等效电路建模方法,重点概述了2.5D/3D封装下PDN的建模与优化。通过将整块的大尺寸硅桥拆分为多个小硅桥、硅桥集成硅通孔(TSV)、增加TSV数量等方式减少电源噪声。最后,对比采用不同集成方案的DC-DC电源管理模块的PDN性能,结果表明,片上集成方案在交流阻抗、电源噪声以及直流压降等指标上都优于传统的基板集成方案,是3D Chiplet中具有潜力的供电方案。

关键词： 2.5D/3D封装芯粒电源分配网络硅通孔

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

Evaluation of arsenic pollution in field-contaminated soil at the soil’s actual pH

引用

Journal of Environmental Sciences 2024年第10期144卷 137-147页

作者： Tiancong Gao Haixia Tian huimin Niu Mallavarapu Megharaj Wenxiang he College of Natural Resources and Environment Northwest A&F UniversityKey Laboratory of Plant Nutrition and Agro-environment in Northwest ChinaMinistry of AgricultureYanglingShaanxi 712100China Global Centre for Environmental Remediation College of EngineeringScience and EnvironmentUniversity of NewcastleCallaghanNSW 2308Australia

The pollution and ecological risks posed by arsenic(As)entering the soil are the major environmental challenges faced by human *** phosphatase can serve as a useful indicator for assessing As contamination under specific soil pH ***,the study of phosphatase kinetics in long-term field As-contaminated soil remains unclear,presenting a significant obstacle to the monitoring and evaluation of As pollution and *** purpose of this study was to determine phosphatase activity and explore enzyme kinetics in soils subjected to long-term field As *** revealed that the soil phosphatase activity varied among the tested soil samples,depending on the concentrations of *** relationship between total As,As fractions and phosphatase activity was found to be significant through negative exponential function *** parameters,including maximum reaction velocity(Vmax),Michaelis constant(Km)and catalytic efficiency(V_(max)/K_(m)),ranged from 3.14×10^(−2)–53.88×10^(−2) mmol/(L·hr),0.61–7.92 mmol/L,and 0.46×10^(−2)–11.20×10^(−2) hr−1,*** and Vmax/Km of phosphatase decreased with increasing As pollution,while Km was less ***,Vmax/Km showed a significant negative correlationwith all As fractions and total *** ecological doses(ED10)for the complete inhibition and partial inhibition models ranged from0.22–70.33 mg/kg and 0.001–55.27 mg/kg,respectively,indicating that V_(max)/K_(m) can be used as an index for assessing As pollution in field-contaminated *** study demonstrated that the phosphatase kinetics parameters in the soil’s pH system were better indicators than the optimal pH for evaluating the field ecotoxicity of As.

关键词： Arsenic pollution Ecological risk Soil phosphatase Enzyme kinetics Catalytic efficiency(V_(max)/K_(m))

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

Tribological Behaviors of Electroless Nickel-Boron Coating on Titanium Alloy Surface

引用

Chinese Journal of Mechanical Engineering 2024年第1期37卷 309-320页

作者： Yao Jia Jianping Lai Jiaxin Yu huimin Qi Yafeng Zhang Hongtu he Key Laboratory of Testing Technology for Manufacturing Process in Ministry of Education State Key Laboratory of Environment-Friendly Energy MaterialsSouthwest University of Science and TechnologyMianyang 621010China

Titanium alloys are excellent structural materials in engineering fields,but their poor tribological properties limit their further *** plating is an effective method to enhance the tribological performance of alloys,but it is difficult to efficiently apply to titanium alloys,due to titanium alloy’s strong chemical *** this work,the electroless Nickel-Boron(Ni-B)coating was successfully deposited on the surface of titanium alloy(Ti-6AL-4V)via a new pre-treatment ***,linearly reciprocating sliding wear tests were performed to evaluate the tribological behaviors of titanium alloy and its electroless Ni-B *** was found that the Ni-B coatings can decrease the wear rate of the titanium alloy from 19.89×10^(−3)mm^(3)to 0.41×10^(−3)mm^(3),which attributes to the much higher hardness of Ni-B *** heat treatment,the hardness of Ni-B coating further increases corresponding to coating crystallization and hard phase ***,heat treatment does not improve the tribological performance of Ni-B coating,due to the fact that higher brittleness and more severe oxidative wear exacerbate the damage of heat-treated ***,the Ni-B coatings heat-treated both in air and nitrogen almost present the same tribological *** finding of this work on electroless coating would further extend the practical applications of titanium alloys in the engineering fields.

关键词： Electroless coating Titanium alloy Tribology Wear heat treatment Nanoindentation

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

Achieving single-cell-resolution lineage tracing in zebrafish by continuous barcoding mutations during embryogenesis

引用

Journal of Genetics and Genomics 2024年第9期51卷 947-956页

作者： Zhan Liu Hui Zeng huimin Xiang Shanjun Deng Xionglei he State Key Laboratory of Biocontrol School of Life SciencesSun Yat-Sen UniversityGuangzhouGuangdong 510275China

Unraveling the lineage relationships of all descendants from a zygote is fundamental to advancing our understanding of developmental and stem cell ***,existing cell barcoding technologies in zebrafish lack the resolution to capture the majority of cell divisions during embryogenesis.A recently developed method,a substitution mutation-aided lineage-tracing system(SMALT),successfully reconstructed high-resolution cell phylogenetic trees for Drosophila ***,we implement the SMALT system in zebrafish,recording a median of 14 substitution mutations on a one-kilobase-pair barcoding sequence for one-day post-fertilization *** this system,we reconstruct four cell lineage trees for zebrafish fin cells,encompassing both original and regenerated *** tree consists of hundreds of internal nodes with a median bootstrap support of 99%.Analysis of the obtained cell lineage trees reveals that regenerated fin cells mainly originate from cells in the same part of the *** multiple times sampling germ cells from the same individual,we show the stability of the germ cell pool and the early separation of germ cell and somatic cell *** system offers the potential for reconstructing high-quality cell phylogenies across diverse tissues,providing valuable insights into development and disease in zebrafish.

关键词： Lineage tracing Cellular barcoding Zebrafishcell phylogeny Fin regeneration Germcell lineage

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：