排序方式： 共有6条查询结果，搜索用时 140 毫秒
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目的：基于CiteSpace软件探析龙胆泻肝汤的研究现状、热点和趋势。方法：以龙胆泻肝汤为主题词检索2013年1月1日至2023年6月30日中国知网（CNKI）、万方数据（WANFANG DATA）和维普中文科技期刊数据库（VIP)中已发表的相关期刊文献,采用NoteExpress去重后,导入CiteSpace 6.2.R2软件对所纳入文献的作者、机构、关键词等信息进行总结归纳分析,形成可视化图谱,并统计具体频次。结果：共纳入文献1232篇,近10年内发文量有小幅度波动,但总体较稳定。发文量最多的作者为毕宏生和张晓杰（均发文7篇）,发文量最多的机构为山东中医药大学,高频关键词有“带状疱疹”“临床疗效”“中西医结合”等。结论：龙胆泻肝汤治疗带状疱疹、突发性耳聋等疾病的临床疗效是研究热点,探索其活性成分和作用靶点等药理学机制是研究趋势。 相似文献
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目的：基于CiteSpace软件分析刺络拔罐疗法领域的研究现状、热点及前沿。方法：检索中国知网（CNKI）中自建库至2023年3月5日有关刺络拔罐疗法的文献,应用CiteSpace 5.8.R3软件对所纳入文献的作者、机构、关键词等信息进行分析,绘制可视化图谱。结果：共纳入1662篇文献,年度发文量呈稳步上升趋势;高产作者以宋亚光为代表;高产机构以天津中医药大学为代表,刺络拔罐疗法研究领域作者间合作欠紧密,机构间跨区域合作较少;我国对于该领域的研究主要集中在临床疗效、中医疗法、中医观察等方面,近年中风或将成为该领域的研究热点。结论：今后各机构间应注重跨区域合作交流,促进信息资源合作共享,加强基础研究,促进该领域发展。 相似文献
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列举并尝试对比了非洲早白垩世脊椎动物化石的主要产地。晚侏罗世(坦桑尼亚的敦达古鲁基默里奇期提塘期)至白垩纪最早期(南非的阿尔戈阿盆地凡兰吟期)的组合中含有剑龙、腕龙和梁龙,到前阿普特期(欧特里沃期巴列姆期?)被另一组合所取代。这一更年轻的组合中含有重爪龙亚科棘龙类、大头鳄类鳄鱼Sarcosuchus以及大型禽龙,它们主要来自尼日尔(ElRhaz组和喀麦隆(Koum组),部分来自利比亚(Cabao组)和突尼斯(Douiret组),后两组中还含有鲨鱼Priohybodus ar ambourgi。阿普特期(?)至早阿尔必期组合中仍含有禽龙,但是棘龙科棘龙类取代了重爪龙亚科。早塞诺曼期组合(Bahariya,Kem Kem)以恐龙Spinosaurus、Carcharodonto saurus,鲨鱼(Onchopris tisnumidus)和鳄鱼(利比亚鳄类、无棘腔鳄类)为特征。由此可知,中非的一些原先被认为是早白垩世的地层(坦桑尼亚的Galula组、马拉维的含恐龙层)为晚白垩世。脊椎动物化石在非洲陆相地层的对比中具有重要作用。 相似文献
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To investigate the stratification of hydrolytic enzyme activities and importance of subsurface layers in depolymerization of detritus biopolymers,nine hydrolytic enzyme activities involved in the cycling of carbon,phosphorus,nitrogen and sulphur were measured in various sediment layers and their extracts at Kylaniemi in Lake Saimaa in southern Finland and in Lake Ahvenjarvi in northern Finland. The results show that for each lake all nine hydrolytic enzyme activities were higher in all sediment layers than in comparable sediment extracts indicating that the major part of enzymes was bound to the sediment particles in all layers in both lakes.Carbohydratase,P-cellobiosidase,activities did not show any gradient with sediment depth at Kylaniemi in Lake Saimaa indicating that there was rapid turnover of carbohydrates in the entire sediment column.The activities of acetate esterase,butyrate esterase,phosphomonoesterase,aminopeptidase,N-acetyl glucosaminidase,sulphatase andβ-glucosidase in the deepest layers were 19-53%of those in the surface sediment indicating that depolymerization of biopolymers involved in the cycling of carbon,nitrogen,phosphorus and sulphur was substantial in subsurface sediment. 相似文献
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HydrIS:一个用于地下水管理的开放的GIS决策支持系统——以Morocco为例(英文) 总被引：1，自引：0，他引：1
A regional groundwater management system has been elaborated, integrating Relational Database Management System (RDBMS) and
various web services. It consists of web geospatial application so-called HydrIS ( Hydrogeological Information System) based
on Open Source components and technologies, leading to a feasible and low-cost solution. Therefore, HydrIS permits delivery
of data from a number of heterogeneous sources to standards supported by the Open Geospatial Consortium (OGC). The protocols
used for exchanging data are also derived from OGC standards, i.e., WMS (Web Mapping Service), WFS (Web Feature Service),
and WCS (Web Coverage Service). Finally, a geoportal was developed, which consists of client-applications that communicate
with different Web Services (WMS, WCS, and WFS) through http-requests.
A prototype for web-based GIS application was designed using the deegree Framework to provide systematic interfaces and functions.
This system was developed to demonstrate the value of making hydrogeological data more widely accessible through client/server
architecture. This experience and knowledge already gained in this project will be a source for technology transfer and policy
decisions. Otherwise, this will enable user groups to improve the management of their groundwater resources and contribute
to enhanced decision support capabilities.
相似文献
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Qinghua YANG Jiping LIU Matti LEPPRANTA Qizhen SUN Rongbin LI Lin ZHANG Thomas JUNG Ruibo LEI Zhanhai ZHANG Ming LI Jiechen ZHAO Jingjing CHENG 《大气科学进展》2016,33(5):535-543
The snow/sea-ice albedo was measured over coastal landfast sea ice in Prydz Bay, East Antarctica(off Zhongshan Station)during the austral spring and summer of 2010 and 2011. The variation of the observed albedo was a combination of a gradual seasonal transition from spring to summer and abrupt changes resulting from synoptic events, including snowfall, blowing snow, and overcast skies. The measured albedo ranged from 0.94 over thick fresh snow to 0.36 over melting sea ice. It was found that snow thickness was the most important factor influencing the albedo variation, while synoptic events and overcast skies could increase the albedo by about 0.18 and 0.06, respectively. The in-situ measured albedo and related physical parameters(e.g., snow thickness, ice thickness, surface temperature, and air temperature) were then used to evaluate four different snow/ice albedo parameterizations used in a variety of climate models. The parameterized albedos showed substantial discrepancies compared to the observed albedo, particularly during the summer melt period, even though more complex parameterizations yielded more realistic variations than simple ones. A modified parameterization was developed,which further considered synoptic events, cloud cover, and the local landfast sea-ice surface characteristics. The resulting parameterized albedo showed very good agreement with the observed albedo. 相似文献
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