检索结果-南通市图书馆

同方期刊数据库

Pharmacological effects of volatile oil from chrysanthemum and its associated mechanisms:a review

在线全文

学校读者我要写书评

暂无评论

Acupuncture and Herbal Medicine 2024年第1期4卷 79-91页

作者： Jing Zhang Weiqiang Su Nina Filipczak Ying luo anping Wan Yao He Shijuan Yan Xiang Li Ming Yang Key Laboratory of Modern Preparation of TCM Ministry of EducationJiangxi University of Chinese MedicineNanchangChina Center for Pharmaceutical Biotechnology and Nanomedicine Northeastern UniversityBostonUSA National Pharmaceutical Engineering Center for Solid Preparation in Chinese Herbal Medicine Jiangxi University of Chinese MedicineJiangxi University of Chinese MedicineNanchangChina

Volatile oil(VO)is the main chemical component of common plants in Chrysanthemum genus,and it possesses several beneficial pharmacological properties,including bacteriostatic,antioxidant,anti-tumor,anti-inflammatory,antipyretic,analgesic,antiosteoporotic,antihypertensive,sedative,and hypnotic *** date,research on the effective components of Chrysanthemum extract has mainly focused on flavonoids,whereas limited data are available on the chemical constituents and underlying mechanisms of action of the VO *** this review,the pharmacological activities and mechanisms of VO are comprehensively reviewed with the aim of providing a foundation for further development for medicinal,aromatherapy,and diet therapy applications.

关键词： Action mechanisms Chrysanthemum Pharmacological activity Volatile oil

Deformation monitoring of long-span railway bridges based on SBAS-InSAR technology

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

Geodesy and Geodynamics 2024年第2期15卷 122-132页

作者： Lv Zhou Xinyi Li Yuanjin Pan Jun Ma Cheng Wang anping Shi Yukai Chen College of Geomatics and Geoinformation Guilin University of TechnologyGuilin 541004China Hubei luo Jia Laboratory Wuhan 430079China Ecological Spatiotemporal Big Data Perception Service Laboratory Guilin 541004China School of Geodesy and Geomatics Wuhan UniversityWuhan 430079China China Railway Siyuan Survey and Design Group Co. Ltd.Wuhan 430063China

The deformation monitoring of long-span railway bridges is significant to ensure the safety of human life and *** interferometric synthetic aperture radar(In SAR)technology has the advantage of high accuracy in bridge deformation *** study monitored the deformation of the Ganjiang Super Bridge based on the small baseline subsets(SBAS)In SAR technology and Sentinel-1A *** analyzed the deformation results combined with bridge structure,temperature,and riverbed sediment *** results are as follows:(1)The Ganjiang Super Bridge area is stable overall,with deformation rates ranging from-15.6 mm/yr to 10.7 mm/yr(2)The settlement of the Ganjiang Super Bridge deck gradually increases from the bridge tower toward the main span,which conforms to the typical deformation pattern of a cable-stayed bridge.(3)The sediment scouring from the riverbed cause the serious settlement on the bridge’s east side compared with that on the west side.(4)The bridge deformation negatively correlates with temperature,with a faster settlement at a higher temperature and a slow rebound trend at a lower *** study findings can provide scientific data support for the health monitoring of long-span railway bridges.

关键词： SBAS-InSAR Long-span railway bridge Deformation monitoring Bridge structure Time series deformation

Visible light-induced N-doped TiO_2 nanoparticles for the degradation of microcystin-LR

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2010年第8期53卷 1793-1800,1833-1835页

作者： YANG Jing,CHEN DengXia,DENG anping,FANG YanFen,luo GuangFu,LI DeJiang,LI RuiPing & HUANG YingPing Alan G.MacDiarmid Research Institute of Renewable Energy,China Three Gorges University,Yichang 443000,China Alan G. MacDiarmid Research Institute of Renewable Energy China Three Gorges University Yichang China

N-doped nano-crystalline TiO2 powders have been synthesized by the sol-gel *** shape and crystal structure of the resulting N-doped TiO2 were investigated by X-ray Photoelectron Spectroscopy (XPS),X-ray spectroscopy (XRD),Transmission Electron Microscopy (TEM) and UV-vis reflection *** results showed that doping TiO2 with nitrogen can lower its band gap and apparently shift its optical response to the visible *** the visible light (λ> 420 nm) irradiation,the MC-LR was degraded by the synthesized N-TiO2 *** variation of MC-LR amount and its intermediates were detected by high performance liquid chromatography (HPLC) and LC-MS,*** mineralization of MC-LR was determined by total organic carbon (TOC) ***,transient oxidative species generated during photocatalysis were tracked by electron spin resonance (ESR) and Peroxidase *** these results indicated that visible-light excited N-TiO2 can activate molecular oxygen and thereby achieve degradation of MC-LR completely within 14 *** removal of 59% of TOC was achieved after 20 h *** major oxidative species in the system were hydroxyl radical (·OH) and H2O2.13 Kinds of intermediates were primarily identified in the *** on these results,a reasonable conclusion was drawn for the degradation of MC-LR wherein its four positions are easy to be attacked by the photo-generated OH radical followed by the hydrolyzation of peptides.

关键词： visible Light microcystin-LR N-doped titanium dioxide photocatalysis

美国高等教育中多元理念及其实践——基于俄亥俄州立大学的课程观察与思考

在线全文

学校读者我要写书评

暂无评论

比较教育研究 2019年第9期41卷 60-66页

作者：罗安平西南民族大学文学与新闻传播学院

美国正迎来非同寻常的"后千禧一代":族裔最为多元化,受教育程度创历史最高。高等教育如何形塑新一代大学生的价值观,关乎整个社会的走向与未来。俄亥俄州立大学的课程设置和教育理念是对全球化与多元化社会的积极回应:人文通识课程教导... 详细信息

美国正迎来非同寻常的"后千禧一代":族裔最为多元化,受教育程度创历史最高。高等教育如何形塑新一代大学生的价值观,关乎整个社会的走向与未来。俄亥俄州立大学的课程设置和教育理念是对全球化与多元化社会的积极回应:人文通识课程教导学生审思国家特性,形塑学生的身份认同,正视"政治正确"与多元理念之间的困惑;系统研习移民社会史,使学生理解文化多元与社会融入议题;以"全球学习项目"构建学生的世界知识谱系,培养跨文化沟通与全球合作能力。美国高等教育面临的挑战实质上是主张多元文化思潮与捍卫西方正统文明之间的论争,认知并承认世界的多元性,才能建立一个有尊严而包容的社会。

关键词：美国高等教育多元化美国特性移民问题全球视野

在线全文

学校读者我要写书评

暂无评论

葆育地方感:美国阿帕拉契亚的民俗实践

民族文学研究 2019年第4期37卷 58-66页

作者：罗安平西南民族大学文学与新闻传播学院

在全球化与城市化进程中,当代民俗学研究朝向生活实践,关注城市社会的“原子化”与乡村社会的“空心化”等问题,而“地方感”作为日常而系统的社会-生态观,乃民俗学研究人地关系的一种有效视角。文章介绍美国俄亥俄州立大学民俗研究中... 详细信息

在全球化与城市化进程中,当代民俗学研究朝向生活实践,关注城市社会的“原子化”与乡村社会的“空心化”等问题,而“地方感”作为日常而系统的社会-生态观,乃民俗学研究人地关系的一种有效视角。文章介绍美国俄亥俄州立大学民俗研究中心在阿帕拉契亚的田野实践,调查当地人对于地方的情感与行为。在面临环境、经济及文化变迁的地方,当地人有着怎样的地方认同?从调查中发现,地方感与环境理念、文化记忆以及社会互动等要素相关联。地方感对于民众获得地方胜任力,建设美好家园;对于栖居之地的可持续发展,有着重要意义。

关键词：地方感阿帕拉契亚田野调查民俗学

在线全文

学校读者我要写书评

暂无评论

汽车侧裙板数值成型分析及模具设计

塑料 2024年第2期53卷 168-173,177页

作者：谭安平李玲段扬骆静成都理工大学工程技术学院四川乐山614000

汽车侧裙板长度约为1 m,宽度约为0.1 m,卡扣、加强筋、嵌件孔等复杂结构较多,属于大型细长复杂塑件。大型细长复杂塑件成型难度较大,需要采用数值仿真与模具设计相结合的方法,仿真、设计和验证交叉进行、相互渗透。根据产品的特点拟定了... 详细信息

汽车侧裙板长度约为1 m,宽度约为0.1 m,卡扣、加强筋、嵌件孔等复杂结构较多,属于大型细长复杂塑件。大型细长复杂塑件成型难度较大,需要采用数值仿真与模具设计相结合的方法,仿真、设计和验证交叉进行、相互渗透。根据产品的特点拟定了3种进浇方案,仿真结果表明,方案Ⅲ(9点进浇)翘曲变形量最小,其值为4.51 mm。通过验证方案Ⅲ的缩水性、填充时间、填充等值线、填充末端时间差及压力差等参数可知,方案Ⅲ填充均匀、末端压力一致、产品无缩水,表面无质量缺陷,为可行方案。根据方案Ⅲ进行模具设计,包括浇注系统、成型零部件、推出机构、冷却系统等。模具设计完毕后对冷却系统进行验证,结果表明,凸凹模的模温温差小于10℃,模温趋于一致,无翘曲变形风险。基于方案Ⅲ的模具设计可作为最终方案,为模具制造和生产提供方向。

关键词：汽车侧裙板浇注系统优化冷却系统模具设计

在线全文

学校读者我要写书评

暂无评论

人工智能学习中的出版者权益保护路径探究

中国版权 2024年第3期 88-103页

作者：罗明东周安平西南大学法学院西南大学出版与传播科学研究中心西南大学新闻传媒学院

出版业是致力于提供知识服务的行业,拥有丰富的出版物数据资源,是人工智能学习重要的数据来源。生成式人工智能作为一种颠覆性的技术,给出版业带来了巨大的挑战。人工智能学习中对出版物数据的复制、存储和预处理,存在侵犯出版者就出版... 详细信息

出版业是致力于提供知识服务的行业,拥有丰富的出版物数据资源,是人工智能学习重要的数据来源。生成式人工智能作为一种颠覆性的技术,给出版业带来了巨大的挑战。人工智能学习中对出版物数据的复制、存储和预处理,存在侵犯出版者就出版物数据享有的版权等数据权益的风险。人工智能技术的发展和应用是大势所趋,需要为其学习数据的获取提供便利,但合理使用的路径将过度牺牲出版者的利益。因此,宜充分尊重出版者的数据权益,并探索建立集体管理等出版物海量许可模式。出版者也可发挥资源优势,采取技术措施进行自主维权。

关键词：人工智能机器学习文本和数据挖掘数据库出版者

在线全文

学校读者我要写书评

暂无评论

气动柔性关节的设计与应用

机械设计与研究 2024年第1期40卷 171-178页

作者：李安平殷时蓉罗天洪奚陶陈庆王柯重庆交通大学机电与车辆工程学院重庆400074 重庆文理学院智能制造工程学院重庆400074

针对当前康复下肢机器人动力源刚度较强以及气动人工肌肉控制非线性、滞后性等问题,设计了一种气动人工肌肉和磁流变制动器复合驱动的膝关节结构。依照MRB-PAM柔性关节的运动学模型,探究了仿生柔性关节运动特性;基于三元素模型和Bouc-We... 详细信息

针对当前康复下肢机器人动力源刚度较强以及气动人工肌肉控制非线性、滞后性等问题,设计了一种气动人工肌肉和磁流变制动器复合驱动的膝关节结构。依照MRB-PAM柔性关节的运动学模型,探究了仿生柔性关节运动特性;基于三元素模型和Bouc-Wen模型以及能量守恒定理,研究推导出了关节结构参数与动力学特性的映射模型以及建立了单腿拉格朗日动力学MRB-PAM柔性关节的动力学模型,探究柔性关节的复合驱动机理。研究结果表明,MRB-PAM柔性关节较PAM柔性关节具有良好的稳定性和承载能力,验证了MRB-PAM柔性关节的可行性。

关键词：复合驱动柔性关节气动人工肌肉磁流变液制动器动力学特性

Dolomitization evolution and its effects on hydrocarbon reservoir formation from penecontemporaneous to deep burial environment

在线全文

学校读者我要写书评

暂无评论

Petroleum Exploration and Development 2022年第4期49卷 731-743页

作者： SHEN Anjiang luo Xianying HU anping QIAO Zhanfeng ZHANG Jie PetroChina Hangzhou Institute of Petroleum Geology Hangzhou 310023China Key Laboratory of Carbonate Reservoirs CNPCHangzhou 310023China

Aiming at the scientific problem that only part of dolomite acts as dolomite reservoir,this paper takes the multiple dolomite-bearing formations in the Tarim and Ordos basins,NW China and Sichuan Basin,SW China as the study object,by means of mineral petrological analysis and geochemical methods including carbonate clumped isotope,U-Pb isotopic dating,etc.,to rebuild the dolomitization pathway and evaluate its effects on reservoir *** the basis of detailed rock thin section observation,five dolomitic structural components are identified,including original fabric-retained dolomite(microbial and/or micrite structure),buried metasomatic dolomite I(subhedral-euhedral fine,medium and coarse crystalline structure),buried metasomatic dolomite II(allotriomorphic-subhedral fine,medium and coarse crystalline structure),buried precipitation dolomite and coarse crystalline saddle *** them,the first three exist in the form of rocks,the latter two occur as dolomite minerals filling in pores and *** corresponding petrological and geochemical identification templates for them are *** on the identification of the five dolomitic structural components,six dolomitization pathways for three types of reservoirs(preserved dolomite,reworked dolomite and limestone buried dolomitization)are *** initial porosity of the original rock before dolomitization and the dolomitization pathway are the main factors controlling the development of dolomite *** preserved dolomite and reworked dolomite types have the most favorable dolomitization pathway for reservoir formation,and are large scale and controlled by sedimentary facies in development and distribution,making them the first choices for oil and gas exploration in deep carbonate formations.

关键词： dolomitization dolomitization pathway dolomite reservoir carbonates penecontemporaneous environment burial environment dolomite genesis identification template