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

高校公共体育课程思政的项群化教学探析

教育理论与实践 2024年第18期44卷 42-45页

作者：卫微山西农业大学体育部山西晋中030800

高校公共体育课程思政项群化教学的现实意义在于,推进公共体育课程思政的一体化建设、延展公共体育课程思政的育人内涵和效度、创新公共体育课程思政的教学模式。系统谋划和重构体育课程思政的项群化教学实施策略,需要从思政元素、教学... 详细信息

高校公共体育课程思政项群化教学的现实意义在于,推进公共体育课程思政的一体化建设、延展公共体育课程思政的育人内涵和效度、创新公共体育课程思政的教学模式。系统谋划和重构体育课程思政的项群化教学实施策略,需要从思政元素、教学设计、教学方法、教学评价等方面,精准探析教学载体,提升课程思政教学的育人成效,推动高校公共体育课程思政建设的的深入发展。

关键词：高校公共体育课程课程思政项群化教学

Fine-mapping and primary analysis of candidate genes associated with seed coat color in mung bean(Vigna radiata L.)

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Agriculture 2024年第8期23卷 2571-2588页

作者： Qian Wang Huimin Cao Jingcheng Wang Zirong Gu Qiuyun Lin Zeyan Zhang Xueying Zhao wei Gao Huijun Zhu Hubin Yan Jianjun Yan Qingting Hao Yaowen Zhang College of Agronomy Shanxi Agricultural UniversityTaiyuan 030031China 2 Tropical Crops Genetic Resources Institute Chinese Academy of Tropical Agricultural SciencesHaikou 571101China

Seed coat color affects the appearance and commodity quality of mung beans(Vigna radiata L.).The substances that affect mung bean seed coat color are mainly flavonoids,which have important medicinal *** the seed coat color gene in mung beans would facilitate the development of new varieties and improve their *** this study,an F2 mapping population consisting of 546 plants was constructed using Jilv9(black seed coat)and BIS9805(green seed coat).Using bulk segregated analysis(BSA)sequencing and kompetitive allele-specific PCR(KASP)markers,the candidate region related to seed coat color was finally narrowed to 0.66 Mb on chromosome(Chr.)4 and included eight candidate *** transcriptome and metabolome analyses showed that three of the eight candidate genes(LOC106758748,LOC106758747,and LOC106759075)were differentially expressed,which may have caused the differences in flavonoid metabolite content between Jilv9 and *** findings can provide a research basis for cloning the genes related to seed coat color and accelerate molecular markerassisted selection breeding in mung beans.

关键词： mung bean seed coat color bulk segregated analysis sequencing transcriptome metabolism flavonoids

在线全文

学校读者我要写书评

暂无评论

高密度面波法在地基质量检测中的应用探讨

工程技术研究 2024年第5期9卷 216-218页

作者：周立业危键张伟上海城建市政工程(集团)有限公司上海200032 上海交通大学土木工程系上海200240

随着高填方场地强夯地基的大范围推广应用,实现对填方质量高效、快速、大面积的检测,并提供较为准确的岩土力学参数,具有重要的经济及安全意义。基于此,文章结合四川西部某高填方工程实例,阐述了高密度面波法的技术原理和技术流程,并系... 详细信息

随着高填方场地强夯地基的大范围推广应用,实现对填方质量高效、快速、大面积的检测,并提供较为准确的岩土力学参数,具有重要的经济及安全意义。基于此,文章结合四川西部某高填方工程实例,阐述了高密度面波法的技术原理和技术流程,并系统开展基于高密度面波法的地基检测研究。通过现场试验、频散分析、反演分析等技术手段,获得高填方地基的剪切波速度分层构造和岩土力学参数,结果表明该方法可高效、直观和大面积地检测填方质量,可为高填方场地质量检测提供相关经验。

关键词：高密度面波法质量检测瑞雷波

在线全文

学校读者我要写书评

暂无评论

分布式驱动系统用轮毂电机及其技术综述

中国电机工程学报 2024年第7期44卷 2871-2885,I0030页

作者：章恒亮花为东南大学电气工程学院江苏省南京市210096

应用轮毂电机的分布式驱动型电动汽车在系统效率、车身控制、平台开发等方面具有突出优势,是新一代电动汽车领域的研究热点和重要发展方向。该文对比分析电动汽车集中式驱动与分布式驱动的技术优缺点,指出分布式驱动系统用轮毂电机具有... 详细信息

应用轮毂电机的分布式驱动型电动汽车在系统效率、车身控制、平台开发等方面具有突出优势,是新一代电动汽车领域的研究热点和重要发展方向。该文对比分析电动汽车集中式驱动与分布式驱动的技术优缺点,指出分布式驱动系统用轮毂电机具有巨大的发展潜力;介绍国内外学者在轮毂电机拓扑创新方面做的工作,总结该领域的研究特点以及面向高转矩密度的技术发展方向;阐述振动分析与抑制、温升计算与冷却、多目标优化与算法加速这三大轮毂电机优化设计研究领域的技术进展,提出全局性多物理场分析优化理论的技术空白;阐明驱动控制领域的研究主要围绕单电机层的高性能控制与容错控制、整车层的多电机协同控制展开;最后,该文总结分布式驱动轮毂电机的研究进展,展望该领域的技术研究方向。

关键词：轮毂电机电动汽车分布式驱动永磁同步电机

不同养护制度下粉煤灰混凝土压缩冻融损伤演化

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

水电能源科学 2024年第7期42卷 101-104页

作者：莫黎魏留明周强于雷河南建筑职业技术学院工程管理系河南郑州450064 中国港湾工程有限责任公司北京100027 武汉理工大学硅酸盐建筑材料国家重点实验室湖北武汉430070

为研究不同养护制度下混凝土冻损受压损伤演化规律,开展粉煤灰混凝土冻融循环试验和单轴压缩—声发射试验。结果表明,蒸养混凝土冻损受压行为呈明显“三阶段”分布特征,即瞬时变形期(Ⅰ阶段)、变形发展期(Ⅱ阶段)及变形陡增期(Ⅲ阶段);... 详细信息

为研究不同养护制度下混凝土冻损受压损伤演化规律,开展粉煤灰混凝土冻融循环试验和单轴压缩—声发射试验。结果表明,蒸养混凝土冻损受压行为呈明显“三阶段”分布特征,即瞬时变形期(Ⅰ阶段)、变形发展期(Ⅱ阶段)及变形陡增期(Ⅲ阶段);随着冻融循环次数的递增,变形发展期与变形陡增期的分界点在时间横轴上后移,累计事件数峰值呈先增后减变化趋势;蒸汽养护温度过高对混凝土抗冻性不利。

关键词：养护制度粉煤灰混凝土冻融循环冻损受压损伤度声发射

Spatial Matching Degree Between Education, Healthcare, Elderly Care Facilities and the Built Environment in Megacities Based on POI data: A Case Study of Chengdu Central Urban Area

在线全文

学校读者我要写书评

暂无评论

China City Planning Review 2024年第3期33卷 6-17页

作者： Shi Manjiang wei Lanyan Cao Qi Huang Yudie Li Min(Translated) Southwest University of Science and Technology MianyangP.R.China 不详

During rapid urbanization, megacities see disparities in the spatial distribution of basic public service facilities and the urban built environment. Current research on basic public service facilities focuses on equal spatial distribution, leading to the overlook of their match with the surrounding built environment. Based on a case study on education, healthcare, and elderly care facilities in Chengdu central urban area, this paper analyzes the spatial distribution of these facilities and the built environment, and examines their spatial matching degree using a bivariate spatial autocorrelation model. The findings reveal the following insights: firstly, education and healthcare facilities present a “one core and multi-center” spatial distribution pattern, with the city center serving as the core and suburban subdistricts acting as the multiple centers, while elderly care facilities present a core-edge distribution pattern in contrast;secondly, the built environment presents a core-edge radial distribution pattern, with the city center acting as the nucleus that connects suburban subdistricts;thirdly, the spatial matching degree between the facilities and the urban built environment from the city center outwards is characterized by high, low, medium, and high levels. Notably, a significant spatial mismatch is observed in urban-rural transitional zones. In light of these findings, the paper comes to a conclusion that during urbanization, the efforts to equalize basic public service facilities in the urban-rural transitional zones may lead to spatial mismatches, to which urban planners and managers should pay close attention.

关键词： basic public service facilities urban built environment spatial autocorrelation analysis Chengdu

在线全文

学校读者我要写书评

暂无评论

碳化硼陶瓷自润滑研究现状

中国表面工程 2024年第3期37卷 103-114页

作者：张巍张杰中国科学院金属研究所沈阳材料科学国家研究中心沈阳110016 沈阳工业大学材料科学与工程学院沈阳110870

碳化硼(B_(4)C)陶瓷的自润滑对其摩擦学性能具有重要影响,但缺乏这方面的系统性综述介绍。碳化硼具有高的硬度(维氏硬度为36 GPa),因此碳化硼陶瓷是一种应用于耐磨元件的潜在候选材料。然而,碳化硼陶瓷的摩擦因数较高,增加了摩擦系统的... 详细信息

碳化硼(B_(4)C)陶瓷的自润滑对其摩擦学性能具有重要影响,但缺乏这方面的系统性综述介绍。碳化硼具有高的硬度(维氏硬度为36 GPa),因此碳化硼陶瓷是一种应用于耐磨元件的潜在候选材料。然而,碳化硼陶瓷的摩擦因数较高,增加了摩擦系统的能耗,限制了其广泛应用。自润滑是一种可避免外部润滑剂造成污染的方法,揭示碳化硼陶瓷自润滑的机理可为解决碳化硼陶瓷摩擦因数高的问题提供可行参考方案。目前碳化硼陶瓷自润滑的方式主要有预氧化、添加固体润滑剂、构建表面浮雕结构三种。预氧化是将碳化硼陶瓷预先在空气环境中进行高温下氧化处理,使其表面生成氧化层;添加固体润滑剂是将具有层状晶体结构的材料添加到碳化硼陶瓷基体中,在滑动过程中固体润滑剂从碳化硼陶瓷基体中脱落,从而在碳化硼陶瓷的磨损面上形成一层外部润滑层;构建表面浮雕结构是在碳化硼陶瓷基体中引入硬度相对较低的第二相,利用两相晶粒的硬度差,在滑动过程中原位生成凹凸的表面形貌。这些自润滑方法虽然存在技术上的局限,但仍可在一定工况下实现碳化硼陶瓷的自润滑,减小摩擦副的摩擦因数,降低摩擦系统的能耗。总结近年来碳化硼陶瓷自润滑的相关研究进展,并对碳化硼陶瓷自润滑未来的研究方向进行展望,研究结果填补了碳化硼陶瓷自润滑领域目前缺少综述文章来引领的空白,可为碳化硼陶瓷自润滑的设计、研究及应用提供有益的指导。

关键词：碳化硼陶瓷自润滑预氧化固体润滑剂浮雕结构

Estimating SVCV waterborne transmission and predicting experimental epidemic development:A modeling study using a machine learning approach

在线全文

学校读者我要写书评

暂无评论

Water Biology and Security 2024年第1期3卷 60-70页

作者： Jiaji Pan Qijin Zeng wei Qin Jixiang Chu Haibo Jiang Haiyan Chang Jun Xiao Hao Feng State Key Laboratory of Developmental Biology of Freshwater Fish College of Life ScienceHunan Normal UniversityChangsha410081China College of Engineering and Design Hunan Normal UniversityChangsha410081China

Viral infectious diseases significantly threaten the sustainability of freshwater fish *** lack of studies on epidemic transmission patterns and mechanisms inhibits the development of containment strategies from the viewpoint of veterinary public *** study raises an epidemic mathematical model considering water transmission with the aim of analyzing the transmission process more *** basic reproduction number R0 was derived by the model parameter including the water transmission coefficient and was used for the analysis of the virus *** viremia of carp virus(SVCV)and zebrafish were used as model viruses and animals,respectively,to conduct the transmission *** through water was achieved by connecting two aquarium tanks with a water channel but blocking the fish movement between the *** the collected experimental data,we determined the optimal hybrid machine learning algorithm to analyze the transmission process using an established mathematical *** addition,future transmission was predicted and validated using the epidemic model and an optimal ***,the sensitivity of model parameters and the simulations of R0 variation were performed based on the modified complex epidemic *** study is of significance in providing theoretical guidance for minimizing R0 by manipulating model parameters with containment *** importantly,since the modified model and algorithm demonstrated better performance in handling freshwater fish transmission problems,this study advances the future application of transmissible disease modeling with larger datasets in freshwater fish aquaculture.

关键词： Epidemic mathematical model Hybrid machine learning algorithm Reproduction number Sensitivity analysis SVCV transmission

Post-synthetic modifications of MOFs by different bolt ligands for controllable release of cargoes

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

Chinese Chemical Letters 2024年第10期35卷 430-433页

作者： Hao Wang Meng-Qi Pan Ya-Fei Wang Chao Chen Jian Xu Yuan-Yuan Gao Chuan-Song Qi wei Li Xian-He Bu College of New Materials and Chemical Engineering Beijing Key Lab of Special Elastomeric Composite Materials Beijing Institute of Petrochemical Technology School of Materials Science and Engineering National Institute for Advanced Materials TKL of Metal and Molecule-Based Material Chemistry Nankai University College of Chemical Engineering Inner Mongolia University of Technology

Post-synthetic modifications(PSM) have drawn great attention as a vigoroso tool to tune or enhance the performance of metal-organic frameworks(MOFs). However, the current PSM method usually have to sacrifice the porosity of MOFs to enrich their functionality, such as pore space partition(PSP) and postsynthetic elimination and insertion(PSE&I), causing a trade-off in this aspect. To address this issue, we herein propose a new PSM strategy of using the size-matching ligands as the bolts to lock MOFs' pores,which could be anchored onto open metal sites(OMSs) after guest loading through a stepwise manipulation. As a result, the loaded cargoes undergo a controlled releasing process with respect to different bolt ligands. Our proposed strategy provides a promising way to balance the functionality and porosity of MOFs.

关键词： Bolting ligand Cargo Control release Metal-organic frameworks Post-synthetic modifications