检索结果-南通市图书馆

Exploration of the mechanism of cavitation vortex rope and vortex development in the draft tube of tubular turbine units

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

International Journal of Agricultural and Biological Engineering 2024年第1期17卷 163-171,F0002页

作者： Chuang Cheng Zhenggui Li Changrong Shen Shenglong Gu Chuchu Zeng Chuanzheng Bai Meng Liu junfeng Hu Qinghai University of Science and Technology Xining 810000China Key Laboratory of Fluid and Power Machinery Ministry of Education(Xihua University)Chengdu 610039China South-to-North Water Diversion East Jiangsu Water Source Co. Ltd.Nanjing 210029China School of civil engineering and water resources Qinghai UniversityXining 810016China Dongyuan Branch of Shenzhen Water Planning and Design Institute Co. Ltd.Changsha 410000China

Draft tube vortex rope is considered a special cavitation flow phenomenon in tubular turbine *** vortex rope is one of the most detrimental factors affecting the safety of hydraulic *** this study,ANSYS CFX software was utilized to numerically simulate the internal cavitation flow of a hydraulic turbine draft *** evolution of the cavitation vortex core was characterized by vortex line distribution and vorticity transport *** shape and number of blades influenced the revolving direction and distribution characteristics of the vortex close to the runner cone,which formed a counterclockwise-clockwise-counterclockwise distribution ***,there were many secondary flows in the draft *** cancellation and dissipation between the flows was one of the reasons for reduction in *** the cross-sectional shape of the draft tube was changed,the vorticity was distributed from the center of the vortex rope to all parts of the cross-sectional draft tube,with extreme values at the center and at the *** vortex stretching and dilatation terms played a major role in the change in vorticity,with the baroclinic torque having an effect at the center of the vortex rope,this study is helpful to understand the flow of water in the draft tube and guide the design and optimization of the draft tube in engineering application.

关键词： cavitation vortex rope vorticity transport equation vortex line draft tube

Developmental Patterns and Gender Differences of Vocal Production in Marmoset Monkeys

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neuroscience Bulletin 2024年第1期40卷 133-138页

作者： Ruixin An Chaocheng Lu Chen Wang Liangtang Chang junfeng Huang Fan Jiang Tian-Le Xu Neng Gong Center for Brain Science Shanghai Children's Medical CenterShanghai Jiao Tong University School of MedicineShanghai 200127China Department of Anatomy and Physiology Shanghai Jiao Tong University School of MedicineShanghai 200025China Department of Critical Care Medicine Huashan HospitalFudan University12 Middle Wulumuqi RoadShanghai 200040China Institute of Neuroscience Key Laboratory of Primate NeurobiologyCAS Center for Excellence in Brain Science and Intelligence TechnologyChinese Academy of SciencesShanghai 200031China Lingang Laboratory Shanghai 200031China Shanghai Center for Brain Science and Brain-Inspired Technology Shanghai 201210China

Dear Editor,The common marmoset(Callithrix jacchus),a small New World monkey species,is considered an ideal non-human primate model for studying the evolution and neural mechanism of vocal behavior due to their rich call repertoire and vocal communication[1-3].Especially,the early vocal development of marmoset monkeys has attracted much attention,because newborn marmosets have been shown to exhibit a vocal development *** two months after birth,marmosets'vocalizations undergo dramatic changes from cries to adult-like mature calls,a process that is influenced not only by inner physical maturation but also by parental care and feedback[4].

关键词： parental birth Pattern

The mediatory role of water quality on the association between extreme precipitation events and infectious diarrhea in the Yangtze River Basin,China

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Fundamental Research 2024年第3期4卷 495-504页

作者： junfeng Yu Liang Zhao Xin-Zhong Liang Hung Chak Ho Masahiro Hashizume Cunrui Huang School of Public Health Sun Yat-sen UniversityGuangzhou 510080China The State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics(LASG) Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Department of Atmospheric and Oceanic Science University of MarylandCollege ParkMD 20740USA Department of Public and International Affairs City University of Hong KongHong Kong 999077China Department of Global Health Policy Graduate School of MedicineThe University of TokyoTokyo 113-0033Japan Vanke School of Public Health Tsinghua UniversityBeijing 100084China Institute of Healthy China Tsinghua UniversityBeijing 100084China

Extreme precipitation is exacerbating the burden of infectious diarrhea in the context of climate change,it is necessary to identify the critical and easy-to-intervene intermediate factors for public health *** quality may be the most important mediator,while relevant empirical evidence is *** study aimed to examine the role of water quality in the process of infectious diarrhea caused by extreme *** infectious diarrhea cases,meteorological factors and water quality data in Yangtze River Basin in China between October 29,2007 to February 19,2017 were ***-stage statistical models were used to estimate city-specific extreme precipitation,water quality and infectious diarrhea relationships that were pooled to derive regional estimates.A causal mediation analysis was used to assess the mediation effect of water *** Yangtze River Basin,extreme precipitation events had a significant impact on infectious diarrhea(Incidence Rate Ratios[IRR]:1.027,95%Confidence Interval[CI]:1.013~1.041).After extreme precipitation events,the dissolved oxygen(DO)in surface water decreased(-0.123 mg/L,95%CI:-0.159 mg/L~-0.086 mg/L),while the un-ionized ammonia(NH(3)-N)increased(0.004 mg/L,95%CI:0.001 mg/L~0.006 mg/L).The combined overall effect of DO and NH(3)-N on infectious diarrhea showed that both low and high concentrations were associated with an increased risk of infectious *** causal mediation analysis showed that the mediation proportion of the two water quality indexes(DO and NH(3)-N)is 70.54%(P<0.001).To reduce the health effects of extreme precipitation,in contrast to current population-oriented health strategies,those that take into account more direct and easy-to-intervene water quality indicators should be encouraged by future policies.

关键词： Extreme precipitation Infectious diarrhea Water quality Dissolved oxygen Un-ionized ammonia Mediation analysis

Silicon-based optical phased array with a reconfigurable aperture for“gaze”scanning of LiDAR

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Photonics Research 2024年第5期12卷 932-940页

作者： HEMING HU YAFANG HE BAISONG CHEN ZIMING WANG YINGZHI LI QIJIE XIE QUANXIN NA ZIHAO ZHI XUETONG LI HUAN QU PATRICK LO junfeng SONG State Key Laboratory of Integrated Optoelectronics College of Electronic Science and EngineeringJilin UniversityChangchun 130012China Peng Cheng Laboratory Shenzhen 518000China Advance Micro Foundry Pte.Ltd. Singapore 117685Singapore

Light detection and ranging(LiDAR)serves as one of the key components in the fields of autonomous driving,surveying mapping,and environment ***,dense points clouds are pursued by LiDAR systems to provide high-definition 3D ***,the LiDAR is typically used to produce abundant yet redundant data for scanning the homogeneous background of scenes,resulting in power waste and excessive processing ***,it is highly desirable for a LiDAR system to“gaze”at the target of interest by dense scanning and rough sparse scans on the uninteresting ***,we propose a LiDAR structure based on an optical phased array(OPA)with reconfigurable apertures to achieve such a gaze scanning *** virtue of the cascaded optical switch integrated on the OPA chip,a 64-,128-,192-,or 256-channel antenna can be selected discretionarily to construct an aperture with variable *** corresponding divergence angles for the far-field beam are 0.32°,0.15°,0.10°,and 0.08°,*** reconfigurable-aperture OPA enables the LiDAR system to perform rough scans via the large beam spots prior to fine scans of the target by using the tiny beam *** this way,the OPA-based LiDAR can perform the“gaze”function and achieve full-range scanning *** scanning time and power consumption can be reduced by 1/4 while precise details of the target are ***,we embed the OPA into a frequency-modulated continuous-wave(FMCW)system to demonstrate the“gaze”function in beam *** results show that the number of precise scanning points can be reduced by 2/3 yet can obtain the reasonable outline of the *** reconfigurable-aperture OPA(RA-OPA)can be a promising candidate for the applications of rapid recognition,like car navigation and robot vision.

关键词： reconfigurable optical antenna

Exploration of Child-friendly Urban Park Design Strategies Based on Child Behavioral Psychology

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

Journal of Landscape Research 2024年第1期16卷 7-11页

作者： WANG Youxuan ZENG junfeng College of Horticulture and Gardening Yangtze UniversityJingzhouHubei 434020China

By studying the behavioral psychology and needs of children,this paper analyzes the essence of child-friendly parks from the perspective of children,and discusses the design principles and key points of child-friendly... 详细信息

关键词： Landscape architecture Child-friendly cities Child behavioral psychology Urban public space Park planning and design

Exploration of Graduate Student Cultivation Mode of Landscape Architecture under the Background of“Artificial Intelligence+X”

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 Landscape Research 2024年第1期16卷 67-69,76页

作者： CAO Yangyang ZENG junfeng College of Horticulture and Gardening Yangtze UniversityJingzhouHubei 434025China

Under the background of“artificial intelligence+X”,the development of landscape architecture industry ushers in new opportunities,and professional talents need to be updated to meet the social *** paper analyzes the cultivation demand of landscape architecture graduate students in the context of the new era,and identifies the problems by comparing the original professional graduate training *** new cultivation mode of graduate students in landscape architecture is proposed,including updating the target orientation of the discipline,optimizing the teaching system,building a“dualteacher”tutor team,and improving the“industry-university-research-utilization”integrated cultivation,so as to cultivate high-quality compound talents with disciplinary characteristics.

关键词： Artificial intelligence+ Landscape architecture Graduate training model Professional talent

Optimization of Urban Ecological Network Based on MSPA-MCR Model: A Case Study of Jingzhou City

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 Landscape Research 2024年第2期16卷 30-34页

作者： LI Shusheng ZENG junfeng College of Horticulture and Gardening Yangtze UniversityJingzhouHubei 434025China

As a key carrier supporting urban ecological health and living environment quality,urban ecological network is a key focus of current urban green space *** City of Hubei Province is taken as the research *** on GIS technology platform,MSPA method is used to analyze the landscape pattern of Jingzhou *** this basis,the landscape connectivity evaluation method is used to accurately identify and extract the source areas with important ecological value in Jingzhou ***,the normalization method and weighting method are combined to create a resistance factor evaluation system to construct the resistance *** on the MCR model,the ecological network of Jingzhou City is successfully constructed,and targeted spatial optimization strategies and development suggestions are proposed.

关键词： Ecological network MSPA Landscape connectivity evaluation Normalization method MCR model Ecological source area Jingzhou City

近10年我国融合教育教师研究的热点与趋势——基于CiteSpace知识图谱的可视化分析

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

现代特殊教育 2022年第18期 54-60页

作者：翁盛肖君凤长沙职业技术学院特殊教育学院长沙410217 郑州幼儿师范高等专科学校特殊教育学院郑州450000

为全面了解国内融合教育教师的研究现状、热点主题及研究前沿,利用CiteSpace软件对国内2012—2021年中国知网(CNKI)学术期刊库中的CSSCI和中文核心期刊文献进行可视化分析。结果表明,国内融合教育教师研究领域的三大研究热点为融合教育... 详细信息

为全面了解国内融合教育教师的研究现状、热点主题及研究前沿,利用CiteSpace软件对国内2012—2021年中国知网(CNKI)学术期刊库中的CSSCI和中文核心期刊文献进行可视化分析。结果表明,国内融合教育教师研究领域的三大研究热点为融合教育教师专业素养研究、融合教育教师职前培养研究和融合教育教师发展相关政策研究。研究前沿主要聚焦于国内外融合教育教师的比较研究和融合教育教师发展的政策研究等。未来研究者在研究内容上,应该进一步开阔研究视野,基于更丰富的理论视角和扩大化的研究对象,开展融合教师专业素养、培养模式、相关政策等热点研究;另一方面,在研究方法上,应该加强质性研究的深度以及各种研究方法的综合应用,以对研究主题进行更全面与深入的剖析。

关键词：融合教育教师热点与展望可视化分析

A novel FGFR1 inhibitor CYY292 suppresses tumor progression,invasion,and metastasis of glioblastoma by inhibiting the Akt/GSK3β/snail signaling axis

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

Genes & Diseases 2024年第1期11卷 479-494页

作者： Yanran Bi Ruiling Zheng Jiahao Hu Ruiqing Shi junfeng Shi Yutao Wang Peng Wang Wenyi Jiang Gyudong Kim Zhiguo Liu xiaokun Li Li Lin School of Pharmaceutical Science Wenzhou Medical UniversityWenzhouZhejiang 325035China College of Pharmacy and Research Institute of Drug Development Chonnam National UniversityGwangju 61186Republic of Korea Department of Dermatology Wenzhou Hospital of Integrated Traditional Chinese and Western MedicineWenzhouZhejiang 325000China Zhejiang Lab for Regenerative Medicine Oujiang LaboratoryWenzhouZhejiang 325035China

Glioblastoma(GBM)is a malignant brain tumor that grows quickly,spreads widely,and is resistant to *** growth factor receptor(FGFR)1 is a receptor tyrosine kinase that regulates cellular processes,including proliferation,survival,migration,and ***1 was predominantly expressed in GBM tissues,and FGFR1 expression was negatively correlated with overall *** rationally designed a novel small molecule CYY292,which exhibited a strong affinity for the FGFR1 protein in GBM cell lines in ***292 also exerted an effect on the conserved Ser777 residue of ***292 dose-depen-dently inhibited cell proliferation,epithelial-mesenchymal transition,stemness,invasion,and migration in vitro by specifically targeting the FGFR1/AKT/Snail pathways in GBM cells,and this effect was prevented by pharmacological inhibitors and critical gene *** vivo experiments revealed that CYY292 inhibited U87MG tumor growth more effectively than ***292 also efficiently reduced GBM cell proliferation and increased survival in orthotopic GBM *** study further elucidates the function of FGFR1 in the GBM and reveals the effect of CYY292,which targets FGFR1,on downstream signaling pathways directly reducing GBM cell growth,invasion,and metastasis and thus impairing the recruitment,activation,and function of immune cells.

关键词： Blood-brain barrier EMT FGFR1 FGFR1 inhibitor Glioblastoma