检索结果-南通市图书馆

Heat transfer and temperature evolution in underground mininginduced overburden fracture and ground fissures: Optimal time window of UAV infrared monitoring

在线全文

学校读者我要写书评

暂无评论

International Journal of Mining Science and Technology 2024年第1期34卷 31-50页

作者： Yixin zhao Kangning Zhang Bo Sun chunwei Ling Jihong Guo Beijing Key Laboratory for Precise Mining of Intergrown Energy and Resources China University of Mining and Technology-BeijingBeijing 100083China School of Energy&Mining Engineering China University of Mining and Technology-BeijingBeijing 100083China State Key Laboratory of Coal Resources and Safe Mining China University of Mining and Technology-BeijingBeijing 100083China

Heat transfer and temperature evolution in overburden fracture and ground fissures are one of the essential topics for the identification of ground fissures via unmanned aerial vehicle(UAV) infrared imager. In this study, discrete element software UDEC was employed to investigate the overburden fracture field under different mining conditions. Multiphysics software COMSOL were employed to investigate heat transfer and temperature evolution of overburden fracture and ground fissures under the influence of mining condition, fissure depth, fissure width, and month alternation. The UAV infrared field measurements also provided a calibration for numerical simulation. The results showed that for ground fissures connected to underground goaf(Fissure Ⅰ), the temperature difference increased with larger mining height and shallow buried depth. In addition, Fissure Ⅰ located in the boundary of the goaf have a greater temperature difference and is easier to be identified than fissures located above the mining goaf. For ground fissures having no connection to underground goaf(Fissure Ⅱ), the heat transfer is affected by the internal resistance of the overlying strata fracture when the depth of Fissure Ⅱ is greater than10 m, the temperature of Fissure Ⅱ gradually equals to the ground temperature as the fissures’ depth increases, and the fissures are difficult to be identified. The identification effect is most obvious for fissures larger than 16 cm under the same depth. In spring and summer, UAV infrared identification of mining fissures should be carried out during nighttime. This study provides the basis for the optimal time and season for the UAV infrared identification of different types of mining ground fissures.

关键词： Heat transfer Overburden fracture Ground fissures Infrared thermal imaging Unmanned aerial vehicle(UAV) COMSOL simulation

宜冲桥水库防洪库容研究及对松澧地区影响分析

在线全文

学校读者我要写书评

暂无评论

湖南水利水电 2024年第1期 33-36页

作者：赵春伟卜继勘黄永强钟红春湖南省水利水电勘测设计规划研究总院有限公司湖南长沙410007 中铁第四勘察设计院集团有限公司湖北武汉430063 湖南省江垭和皂市水库管理处湖南长沙410018

文章基于澧水流域防洪体系建设现状,对制约宜冲桥水库防洪库容的主要因素进行了分析,提出了优化该河段梯级开发、提高水库防洪库容的新方案。并以此为基础,建立流域防洪水库群联合调度模型,分析了宜冲桥水库建设对澧水下游松澧地区的影... 详细信息

文章基于澧水流域防洪体系建设现状,对制约宜冲桥水库防洪库容的主要因素进行了分析,提出了优化该河段梯级开发、提高水库防洪库容的新方案。并以此为基础,建立流域防洪水库群联合调度模型,分析了宜冲桥水库建设对澧水下游松澧地区的影响。方案的提出,优化了澧水流域防洪总体布局,显著增强了宜冲桥水库开发的必要性和可行性,为完善流域防洪体系,保障下游松澧地区防洪安全提供了新思路。

关键词：澧水流域防洪工程体系松澧地区防洪库容水库群联合调度

维普期刊数据库博看期刊

Metagenomics analysis identifies oral Streptococcus as potential biomarkers for nasopharyngeal carcinoma

在线全文

学校读者我要写书评

暂无评论

Journal of Genetics and Genomics 2024年第3期51卷 363-366页

作者： Yanmin Liu Chengtao Wang Lixiang Xie Shuling Du Li Ding Ying Cui Runzhi Chen Jingxiang Zhang Wan Wang Xi Liu Yan Wang Shiyan Chen Tian Tan Qiaochu zhao Limei Yin chunwei Li Yong Chen Tao Ding Department of Immunology and Microbiology Zhongshan School of MedicineSun Yat-sen UniversityGuangzhouGuangdong 510080China Key Laboratory of Tropical Disease Control(Sun Yat-sen University) Ministry of EducationGuangzhouGuangdong 510080China Department of Radiation Oncology The First Affiliated HospitalSun Yat-sen UniversityGuangzhouGuangdong 510080China Department of Infectious Diseases The Fifth Affiliated HospitalSun Yat-sen UniversityZhuhaiGuangdong 519000China Department of Endocrinology&Metabolism The Fifth Affiliated HospitalSun Yat-sen UniversityZhuhaiGuangdong 519000China Department of Otolaryngology The First Affiliated HospitalSun Yat-sen UniversityGuangzhouGuangdong 510080China

Nasopharyngeal carcinoma(NPC)is a malignancy originating from the nasopharyngeal epithelial *** some studies have identified potential biomarkers for early diagnosis of NPC based on metabolomics data(Chen et al.,2023;Zhou et al.,2023)and Epstein-Barr virus subtypes(Xu et al.,2019),their effectiveness and applicability need further investigation,particularly when consideringthe roles of oral microbiota.

关键词： al. nasopharyngeal diagnosis

Unleashing the healing potential:Exploring next-generation regenerative protein nanoscaffolds for burn wound recovery

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

Asian Journal of Pharmaceutical Sciences 2023年第6期18卷 100-112页

作者： Liangwei Si Xiong Guo Hriday Bera Yang Chen Fangfang Xiu Peixin Liu chunwei zhao Yasir Faraz Abbasi Xing Tang Vito Foderà Dongmei Cun Mingshi Yang Wuya College of Innovation Shenyang Pharmaceutical UniversityShenyang 110016China Dr.B.C.Roy College of Pharmacy and Allied Health Sciences Durgapur 713206India Department of Pharmaceutics School of PharmacyShenyang Pharmaceutical UniversityShenyang 110016China Department of Pharmacy Faculty of Health and Medical SciencesUniversity of Copenhagenniversitetsparken 2DK-2100 Copenhagen ODenmark

Burn injury is a serious public health problem and scientists are continuously aiming to develop promising biomimetic dressings for effective burn wound *** this study,a greater efficacy in burn wound healing and the associated mechanisms ofα-lactalbumin(ALA)based electrospun nanofibrous scaffolds(ENs)as compared to other regenerative protein scaffolds were *** serum albumin(BSA),collagen type I(COL),lysozyme(LZM)and ALA were separately blended with poly(ε-caprolactone)(PCL)to fabricate four different composite ENs(LZM/PCL,BSA/PCL,COL/PCL and ALA/PCL ENs).The hydrophilic composite scaffolds exhibited an enhancedwettability and variablemechanical *** ALA/PCL ENs demonstrated higher levels of fibroblast proliferation and adhesion than the other composite *** compared to PCL ENs and other composite scaffolds,the ALA/PCL ENs also promoted a better maturity of the regenerative skin tissues and showed a comparable wound healing effect to Collagen sponge^(■)on third-degree burn *** enhanced wound healing activity of ALA/PCL ENs compared to other ENs could be attributed to their ability to promote serotonin production at wound ***,this investigation demonstrated that ALA is a unique protein with a greater potential for burn wound healing as compared to other regenerative proteins when loaded in the nanofibrous scaffolds.

关键词： Regenerative proteins α-lactalbumin Serotonin Electrospinning Nanofibrous dressing Third-degree burn

在线全文

学校读者我要写书评

暂无评论

如何在初中数学教学中渗透德育

天津教育 2021年第13期 74-75页

作者：赵春卫山东省青岛市即墨区鳌山卫中学

德育是要贯穿于教学工作始终的一项重要内容,也是每一位教师都应该承担起的一项责任和使命。众所周知,在新课改不断要求提升学生思想道德品质的背景下,当前教师最重要的教学任务之一就是做好德育,在确保基础学科教学的同时,帮助和引导... 详细信息

德育是要贯穿于教学工作始终的一项重要内容,也是每一位教师都应该承担起的一项责任和使命。众所周知,在新课改不断要求提升学生思想道德品质的背景下,当前教师最重要的教学任务之一就是做好德育,在确保基础学科教学的同时,帮助和引导中学生树立起正确的思想理念,建立起高尚的道德情操。数学课堂是教师渗透德育的重要阵地,也是提高中学生道德思想水平的重要切入点。

关键词：初中数学教学德育

在线全文

学校读者我要写书评

暂无评论

基坑开挖对下卧既有隧道的变形影响分析

山西建筑 2017年第14期43卷 190-192页

作者：赵春伟天津市市政工程设计研究院天津300000

以宁波市某新建通道上跨既有地铁1号线的基坑开挖工程为背景,建立了Midas/GTS NX三维模型,考虑土体、围护结构和既有隧道的相互作用,分析了地基加固、设置抗浮桩以及开挖顺序引起的时空效应对既有隧道变形的影响,得出了一些有意义的结论。

关键词：基坑工程既有隧道地基加固抗浮桩时空效应

在线全文

学校读者我要写书评

暂无评论

基于Copula函数的洪水过程随机模拟

武汉大学学报（工学版） 2008年第4期41卷 1-4页

作者：张涛赵春伟雒文生武汉大学水利水电学院湖北武汉430072

对实测截口序列进行等量变换,使变换后的截口具有较好的统计规律.应用Copula函数构造洪峰与历时的联合分布,以及相邻截口的联合分布,采用联合随机抽样方法进行大样本的洪水过程随机模拟,为洪水过程设计提出了一种新的随机模拟方法.结果... 详细信息

对实测截口序列进行等量变换,使变换后的截口具有较好的统计规律.应用Copula函数构造洪峰与历时的联合分布,以及相邻截口的联合分布,采用联合随机抽样方法进行大样本的洪水过程随机模拟,为洪水过程设计提出了一种新的随机模拟方法.结果表明,该方法能较好地描述洪峰、历时的统计特性及相关关系,克服了传统模拟方法对历时描述较差的缺点,且能反映出洪水过程的变化特性,截口具有随机波动性、锯齿现象较少.

关键词：洪水过程 Copula函数截口等量变换随机模拟

基于新媒体移动学习方式的大学英语第二课堂教学新途径探讨

在线全文

学校读者我要写书评

暂无评论

江苏科技信息 2015年第36期32卷 37-38页

作者：赵春伟沈阳工业大学辽阳校区基础部

近年来,多媒体网络技术日新月异,大学英语教学改革不断深化和推进,各高校普遍通过现代化的英语教学模式培养高素质人才。网络多媒体基础上的英语学习能使学习者化整为零,充分利用空闲时间,将时空的限制打破,把英语融入现实生活中。文章... 详细信息

近年来,多媒体网络技术日新月异,大学英语教学改革不断深化和推进,各高校普遍通过现代化的英语教学模式培养高素质人才。网络多媒体基础上的英语学习能使学习者化整为零,充分利用空闲时间,将时空的限制打破,把英语融入现实生活中。文章探讨了如何在网络多媒体环境下,利用移动学习方式,系统地、有效地、有针对性地开展第二课堂活动,延伸和补充第一课堂,使学生的课外生活更加丰富多彩,学生对英语的兴趣得到提高;同时,培养学生的自主学习能力,加强学生的英语综合应用能力。

关键词：网络新媒体移动学习方式第二课堂自主学习能力

在线全文

学校读者我要写书评

暂无评论

黑龙江省资源型城市经济转型的金融支持

黑龙江对外经贸 2008年第9期 31-33页

作者：赵春薇李丹哈尔滨商业大学黑龙江哈尔滨150028

以市场化和产业化为导向的资源型城市转型发展,要求广泛而有效率的信用活动和金融运行,以保障持续增加的资本投入和金融资源的有效配置。

关键词：资源型城市经济转型