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高引学者跨国学术流动及对其成长的影响 被引量:8
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作者 陆根书 彭正霞 《研究生教育研究》 CSSCI 2011年第1期62-67,87,共7页
应用ISI Highly Cited提供的数据,分析高引学者跨国学术流动的几种情况,包括不同学科高引学者跨国流动的比例、高引学者的地域分布及成长背景等,讨论了高引学者跨国流动的得失及大学的应对策略。
关键词 高引学者 人才流失 累积优势
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主题文献与其高引文献间的分布特征耦合探析——以学科馆员文献为例 被引量:2
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作者 姚建文 吴丽萍 晁蓉 《情报理论与实践》 CSSCI 北大核心 2014年第10期110-114,138,共6页
文章对耦合本义与国内外文献耦合研究的进展进行了简介,认为特定主题全部文献与其高引文献的分布特征间存在耦合,对"耦合"在文献计量学中的应用进行了拓展,并选择了学科馆员这一特定主题,以CNKI期刊数据库为数据来源,获取了1... 文章对耦合本义与国内外文献耦合研究的进展进行了简介,认为特定主题全部文献与其高引文献的分布特征间存在耦合,对"耦合"在文献计量学中的应用进行了拓展,并选择了学科馆员这一特定主题,以CNKI期刊数据库为数据来源,获取了1851篇学科馆员期刊文献,对所获学科馆员文献与其5%高引文献间的年度分布、刊物分布、作者分布、机构分布、关键词分布、基金分布进行了统计分析与比对,并探讨了他们之间的耦合规律及其研究意义。 展开更多
关键词 学科馆员 文献分布特征 高引文献 耦合
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国内外数字学术类研究的高引论文特征简析——兼论数字学术、数字人文、人文计算关联 被引量:2
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作者 邵晓宁 叶鹰 《情报理论与实践》 CSSCI 北大核心 2020年第12期120-125,共6页
离析数字学术、数字人文、人文计算三大主题,分别以CNKI和Web of Science数据简析了三大主题的高引论文特征,研究揭示:国内发文较国际发文具有一定的滞后性,国内研究在开创性和探索性方面存在不足。共被引网络体现的关联性中文高引论文... 离析数字学术、数字人文、人文计算三大主题,分别以CNKI和Web of Science数据简析了三大主题的高引论文特征,研究揭示:国内发文较国际发文具有一定的滞后性,国内研究在开创性和探索性方面存在不足。共被引网络体现的关联性中文高引论文高于外文高引论文,其中数字学术与数字人文两个主题的关联性较强,而数字学术与人文计算的关联性较弱;引文网络则体现三主题间的耦合都较弱。数字人文作为三大主题中最活跃的主题值得持续关注。 展开更多
关键词 数字学术 数字人文 人文计算 高引论文 引文分析
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呼吸医学高引论文10年变迁分析及对医学期刊的启示 被引量:1
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作者 裴楚 曾广翘 《广州医科大学学报》 2022年第6期79-82,共4页
目的:本文以呼吸医学为切入点,分析呼吸医学高引文作者群体及其选刊的10年对比,分析相对高影响力研究等作者选刊所看重的期刊特征。方法:检索科睿唯安Web of Science数据库中,呼吸系统高被引论文(Highly cited papers)。使用Citespace工... 目的:本文以呼吸医学为切入点,分析呼吸医学高引文作者群体及其选刊的10年对比,分析相对高影响力研究等作者选刊所看重的期刊特征。方法:检索科睿唯安Web of Science数据库中,呼吸系统高被引论文(Highly cited papers)。使用Citespace工具,对过去10年高被引文的趋势进行分析。结果:亚洲及南美国家的高引文数量均有明显增加。《柳叶刀·呼吸医学》的影响力逐渐增强。创刊10年,能快速崛起的原因,可能在于《柳叶刀》的品牌化效应,及其高质量的审稿等因素。结论:注重期刊的品牌建设,提高审稿效率和质量,能增加医学期刊对高质量研究的吸引力。 展开更多
关键词 呼吸医学 高引论文 医学期刊
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基于科学计量学的我国科学论文产出分析 被引量:16
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作者 唐崇敏 官建成 《研究与发展管理》 CSSCI 北大核心 2007年第2期113-118,共6页
运用科学计量学方法,统计美国科学信息所(ISI)提供的数据,对我国的科学研究成果进行定量分析和国际比较,从而来评价我国当前的科学研究现状.结果表明,我国的SCI、SSCI论文呈指数增长,高引文数量虽有增长,但增长速度远远不及论文数量增... 运用科学计量学方法,统计美国科学信息所(ISI)提供的数据,对我国的科学研究成果进行定量分析和国际比较,从而来评价我国当前的科学研究现状.结果表明,我国的SCI、SSCI论文呈指数增长,高引文数量虽有增长,但增长速度远远不及论文数量增长的速度,而且中国内地高校院所入围Highlycited.com高引研究人员名单的数目仅为3人,这从一个侧面反映了我国科学研究机制在经费投入、政策导向、人才培养方面存在着不足. 展开更多
关键词 SCI SSCI 高引 科学计量学 高引研究人员
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基于专利文献的移栽机械发展态势分析 被引量:5
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作者 吴磊琦 谌凯 吴巧玲 《江苏农业科学》 2018年第22期7-13,共7页
基于移栽机械的专利文献,从发展趋势、重点技术领域、区域分布、优势机构、申请人、高引专利、技术路线图等方面开展发展态势分析研究,为移栽机械产业和技术的进一步发展提供情报支撑。结果表明,移栽机械技术从1988年开始真正发展,专利... 基于移栽机械的专利文献,从发展趋势、重点技术领域、区域分布、优势机构、申请人、高引专利、技术路线图等方面开展发展态势分析研究,为移栽机械产业和技术的进一步发展提供情报支撑。结果表明,移栽机械技术从1988年开始真正发展,专利申请量总体呈快速增长趋势,这一趋势延续至今;移栽机械传动机构、动力装置、执行机构、调整机构、施肥机械等是该领域的重点研发技术,自动化、智能化、高适应性是移栽机械的发展方向;中国移栽机械专利申请量排名第2,但专利质量相对美国和日本较低,核心专利缺失,技术水平还有待进一步提高;此外,还从政府和企业2个层面提出我国进一步发展移栽机械的对策建议。 展开更多
关键词 移栽机械 专利文献 竞争情报 发展态势 申请人 高引专利
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中国骨科SCI论文3年现状分析 被引量:3
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作者 孙静 Marius M Scarlat +1 位作者 李银平 胡永成 《中国中西医结合外科杂志》 CAS 2018年第3期304-308,共5页
目的:了解和分析近3年中国骨科国际论文的发展现状,分布情况和主要特点。方法:使用Web of Science网站检索近3年SCI收录的中国骨科论文,根据论文数,按照科研机构和来源期刊进行排序;通过引用频次排序,获取引用数高的论文,并进行分析。结... 目的:了解和分析近3年中国骨科国际论文的发展现状,分布情况和主要特点。方法:使用Web of Science网站检索近3年SCI收录的中国骨科论文,根据论文数,按照科研机构和来源期刊进行排序;通过引用频次排序,获取引用数高的论文,并进行分析。结果:近3年分别有1238篇,1264篇和1225篇来自中国的骨科论文被SCI数据库收录,上海交通大学(n=75)和Eur Spine J(n=114)为发表中国论文数量最多的机构和杂志。纳入的143篇高引论文中,发表最多的研究类型为临床论著(n=70)和系统综述/meta分析(n=50)。高引临床论著涉及最多的主题为"膝",高引系统综述/meta分析最多主题为"脊柱"。结论:2015—2017年,上海交通大学和Eur Spine J发表最多中国骨科SCI论文;高引论文中,涉及最多的主题为"脊柱"和"膝",论文类型分布不均衡,主要集中在临床论著和系统综述。 展开更多
关键词 骨科 中国 SCI论文 高引论文
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社会工作领域最有影响力的期刊论文——2000-2009年专业期刊中引用率最高的100篇论文 被引量:1
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作者 David R.Hodge Jeffrey R.Lacasse +1 位作者 Odessa Benson 文军 《中国社会工作研究》 CSSCI 2012年第2期179-201,共23页
在专业领域,对于引用率高的论文的检测非常普遍,例如在医学领域,这种方法可以增强专业的自身能力。然而,至今很少有研究来专门检测社会工作领域中富有影响力的论文。伴随着过去几十年社会工作学科知识的日益增强,我们选择了2000-2... 在专业领域,对于引用率高的论文的检测非常普遍,例如在医学领域,这种方法可以增强专业的自身能力。然而,至今很少有研究来专门检测社会工作领域中富有影响力的论文。伴随着过去几十年社会工作学科知识的日益增强,我们选择了2000-2009年发表在社会工作专业期刊(共79种)上引用率最高的100篇论文来进行分析。研究结果发现,在这引用率最高的100篇论文中,其主题涉及12个不同的经典领域,其中,“以证据为本的实践”社会工作研究在专业论文中占据了一个相当重要的地位。同时,值得注意的是,几乎2/3的高引用率论文集中发表在4种主要学术期刊上。 展开更多
关键词 文献计量学 专业论述 社会工作文献 高引 用率论文
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Application of Abnormal Touchdown PCR with High Degeneracy Primer in Amplification of Large-Family Genes 被引量:2
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作者 华慧颖 王芳 +1 位作者 常重杰 杜启艳 《Agricultural Science & Technology》 CAS 2011年第2期188-190,共3页
[Objective] The aim was to explore the special methods for amplification of large-family genes by using primers with high degeneracy.[Method] By using the primers with high degeneracy,conventional PCR,conventional tou... [Objective] The aim was to explore the special methods for amplification of large-family genes by using primers with high degeneracy.[Method] By using the primers with high degeneracy,conventional PCR,conventional touchdown PCR and the optimized abnormal touchdown PCR were respectively carried out to amplify the genomic DNA of Cyprinus carpio.[Result] Only one evident electrophoretic band and a few Sox genes were obtained by using normal PCR;no obvious electrophoretic band but dispersive product was obtained by normal touchdown PCR;ideal result was obtained by the abnormal touchdown PCR that three evident electrophoretic bands and much more Sox genes were amplified.[Conclusion] The research provided theoretical basis for the optimization and selection of PCR amplification conditions of the large-family genes. 展开更多
关键词 Primers with high degeneracy Abnormal touchdown PCR Large-family genes AMPLIFICATION
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基于水族文献的计量分析与知识图谱研究 被引量:5
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作者 杨秀璋 《现代计算机》 2019年第1期25-32,共8页
随着科学技术迅速发展,学术成果呈爆炸式增长,挖掘论文的核心作者、识别高引论文、分析文献主题变得日益重要。通过Python抓取中国知网1953-2018年间990篇水族文献,基于文献的计量分析方法挖掘出我国水族文献的高影响力期刊、报纸及机构... 随着科学技术迅速发展,学术成果呈爆炸式增长,挖掘论文的核心作者、识别高引论文、分析文献主题变得日益重要。通过Python抓取中国知网1953-2018年间990篇水族文献,基于文献的计量分析方法挖掘出我国水族文献的高影响力期刊、报纸及机构,分析水族领域高引论文、发文热点时间及核心作者;基于知识图谱的分析方法构建水族文献核心科研群体及作者间的合作关系,并揭示出水族文献的主题演化趋势。实验结果展示我国水族文献的发展历程、核心科研群体和高引论文,识别出水族文化、体育、音乐、医学和水书五大主题的关键词及历年的主题演化趋势,为水族文化的研究和进一步发展提供相关启示。 展开更多
关键词 水族文献 计量分析 知识图谱 高引论文 中国知网
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Effects of Enhanced Ultraviolet Radiation-B on Maize in Arid Regions of Middle-high Elevation 被引量:13
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作者 张磊 王连喜 +2 位作者 李福生 车晶晶 杜宏娟 《Agricultural Science & Technology》 CAS 2009年第1期11-14,73,共5页
[Objective] The experiment aimed to explore the influence of enhanced ultraviolet radiation-B on maize in arid regions of middle-high elevation for correct assessing the influence of enhanced ultraviolet radiation-B o... [Objective] The experiment aimed to explore the influence of enhanced ultraviolet radiation-B on maize in arid regions of middle-high elevation for correct assessing the influence of enhanced ultraviolet radiation-B on maize and providing scientific reference to make proper countermeasures. [ Method] The location test in field and lift lamp of UV-B were used to observe the changes of maize height, leaf area and number of green leaves under influences of different UV-B radiation. [ Result] In arid regions of middle-high elevation, enhanced ultraviolet radiation-B could dwarf maize plant, decrease leaf area, decline number of green leaves and yield. The reason of decreasing leaf area was that enhanced ultraviolet radiation-B shortened leaf length and leaf width while the reason of declining yield was that yield components were all negatively influ- enced and with the increase of ultraviolet radiation-B, the yield declined dramatically. [ Concluslonl The result of this experiment would be good for maize production in arid regions of middle-high elevation. 展开更多
关键词 UV-B Middle-high elevation Arid area MAIZE
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A terrain openness index for the extraction of karst Fenglin and Fengcong landform units from DEMs 被引量:4
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作者 MENG Xin XIONG Li-yang +2 位作者 YANG Xian-wu YANG Bi-sheng TANG Guo-an 《Journal of Mountain Science》 SCIE CSCD 2018年第4期752-764,共13页
The Fenglin and Fengcong landform units are considered to be an important representation for defining the degree of development of Karst landforms. However, these terrain features have been proven difficult to delinea... The Fenglin and Fengcong landform units are considered to be an important representation for defining the degree of development of Karst landforms. However, these terrain features have been proven difficult to delineate and extract automatically because of their complex morphology. In this paper, a new method for identifying the Fenglin and Fengcong landform units is proposed. This method consists of two steps:(1) terrain openness calculation and(2) toe line extraction. The proposed method is applied and validated in the Karst case area of Guilin by using ASTER GDEM with one arc-second resolution. The openness of both the positive and negative terrain and a threshold were used to extract toe lines for segmenting depressions and pinnacles in Fenglin and Fengcong landforms. A comparison between the extracted Fenglin and Fengcong landform units and their real units from high resolution images wascarried out to evaluate the capability of the proposed method. Results show the proposed method can effectively extract the Fenglin and Fengcong landform units, and has an overall accuracy of 93.28%. The proposed method is simple and easy to implement and is expected to play an important role in the automatic extraction of similar landform units in the Karst area. 展开更多
关键词 DEM Karst landform Fenglin and Fengcong landform Terrain openness Landform units
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Intentional introduction of Artemia sinica(Anostraca) in the high-altitude Tibetan lake Dangxiong Co:the new population and consequences for the environment and for humans 被引量:6
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作者 贾沁贤 Elena ANUFRIIEVA +2 位作者 刘喜方 孔凡晶 Nickolai SHADRIN 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2015年第6期1451-1460,共10页
The imbalance between supply and demand of Artemia cysts in China and around the world is increasing now.Salt lakes in Tibet may contribute to the solution of the problem.In Northern Tibet there are 26 saline lakes wh... The imbalance between supply and demand of Artemia cysts in China and around the world is increasing now.Salt lakes in Tibet may contribute to the solution of the problem.In Northern Tibet there are 26 saline lakes whose salinity and temperature may support Artemia survival at an altitude of 4 000–5 100 m.We found Artemia in 15 of these lakes.The saline lakes with Artemia populations mainly belong to the shallow basin lakes,and the majority of these lakes are small in area.The total area of lakes without Artemia is more than 1 000 km 2.Lake Dangxiong Co(Co means lake in Tibet) was chosen for the intentional introduction of Artemia sinica.In 2004,850 g of A.sinica cysts,originating from Qinghai,were introduced in the lake.Surveys in 2006–2014 showed that the average abundance of Artemia adults in the lake gradually increased from 20 ind./m 3 in 2006 to 1950 ind./m 3 in 2013.We assume that two subpopulations of A.sinica,separated by depth,may exist in the lake.The new Artemia population caused an increase in the number of species of phytoplankton and heterotrophic protozoa with a decrease of their total abundance.Water transparency also increased.Dominance in phytoplankton passed from cyanobacteria to diatoms.Changes occurred not only in the lake ecosystem;the number of water birds using the lakes also dramatically increased.Preliminary calculations showed that is it possible to harvest at least about 150 t cysts per year from the lake as well as 3.2 thousand tons of frozen or 350 t of dried biomass of adult Artemia. 展开更多
关键词 ARTEMIA PHYTOPLANKTON water birds Tibet alien species
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Is there an acute exercise-induced physiological/biochemical threshold which triggers increased speed of cognitive functioning? A meta-analytic investigation 被引量:3
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作者 Terry Mc Morris Beverley J.Hale 《Journal of Sport and Health Science》 SCIE 2015年第1期4-13,共10页
Purpose: The purpose of this study was to examine, using meta-analytic measures, the evidence regarding the optimal exercise intensity at which improvements in speed of cognitive function are triggered. Specifically,... Purpose: The purpose of this study was to examine, using meta-analytic measures, the evidence regarding the optimal exercise intensity at which improvements in speed of cognitive function are triggered. Specifically, it was hypothesized that the catecholamine, lactate, and ventilatory thresholds is the point at which significant improvements in speed of cognitive function are observed. Methods: We compared mean effect sizes for threshold studies and for those studies where exercise intensity was classed as moderate (40%-- 79% VO2 or equivalent) but in which the thresholds were not measured. Results: Random effects meta-analysis showed significant, moderate, mean effect sizes for studies at the threshold (g = 0.58, Z = 2.98, p 〈 0.003) and for those during moderate intensity exercise but in which the threshold was not measured ( g = 0.54, Z = 5.0l, p 〈 0.001). There was no significant difference between mean effect sizes, which suggests that the thresholds are unlikely to represent a trigger point. Conclusion: Moderate intensity exercise, even below the thresholds, can induce improved speed of cognition, possibly due to a combination of increased peripheral catecholamine concentrations inducing vagal/nucleus tractus solitarii pathway activation and central increases due to perceptions of stress. 展开更多
关键词 Catecholamine threshold Lactate threshold Stress Vagus nerve Ventilatory threshold
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Electrocardiographic measures of repolarization dispersion and their relationships with echocardiographic indices of ventricular remodeling and premature ventricular beats in hypertension
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作者 Ana Ciobanu Gary Tse +4 位作者 Tong Liu Maria V Deaconu Gabriela S Gheorghe Adriana M Iliesiu Ioan T Nanea 《Journal of Geriatric Cardiology》 SCIE CAS CSCD 2017年第12期717-724,共8页
Objective To examine the relationship between Tpeak- Tend interval (Tpe) and Tpe/QT ratio with occurrence of ventricular premature beats (VPBs) and left ventricular remodeling in hypertension. Methods A total of 5... Objective To examine the relationship between Tpeak- Tend interval (Tpe) and Tpe/QT ratio with occurrence of ventricular premature beats (VPBs) and left ventricular remodeling in hypertension. Methods A total of 52 patients with mild to moderate essential hypertension were included, undergoing echocardiography and 24-hours Holter monitoring. Ventricular remodeling was assessed by left ventricular mass index (LVMI) using the Devereux formula and diastolic fimction by transmitral E and A wave velocities and E/A ratio. Tpe was measured in the precordial leads. The end of the T wave was set by the method of the tangent to the steepest descending slope of the T wave. Results Tpe and Tpe/QT in leads V2 (r = 0.33, P = 0.01; r = 0.27, P = 0.04 respectively) and V3 (r = 0.40, P = 0.002; r = 0.40, P = 0.003, respectively) correlated significantly with LVMI. A significant inverse relationship was observed between E/A ratio and QT (r = -0.33, P = 0.01), Tpe in V3 (r = -0.39, P = 0.003) and Tpe/QT in V3 (r = -0.31, P = 0.02). Tpe in V3, V5, mean Tpe and maximum Tpe with cut-offvalues of 60 ms, 59 ms, 62 ms and 71 ms, respectively, associated with the occurrence of ventricular premature beats. Conclusions The repolarization parameters Tpe interval and Tpe/QT ratio correlate with LVMI and indices of left ventricular diastolic function and show better predictive values than traditional parameters such as QT interval and QT dispersion. Lead V3 is the best lead for measuring Tpe and Tpe/QT. These ECG indices can therefore be used in clinical practice to monitor LV remodeling and predict occurrence of VPBs. 展开更多
关键词 HYPERTENSION REPOLARIZATION Tpeak-Tend Ventricular remodeling
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Ecological risk assessment of the Gannan Plateau,northeastern Tibetan Plateau 被引量:2
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作者 YUE Dong-xia ZENG Jian-jun +6 位作者 YANG Chao ZOU Ming-liang LI Kai CHEN Guan-guang GUO Jian-jun Xu Xiao-feng Meng Xing-min 《Journal of Mountain Science》 SCIE CSCD 2018年第6期1254-1267,共14页
Desertification, soil salinization and grassland degradation are the major environmental hazards faced by the Gannan Plateau, northeastern Tibetan Plateau. Ecological risk assessment plays an important role in formula... Desertification, soil salinization and grassland degradation are the major environmental hazards faced by the Gannan Plateau, northeastern Tibetan Plateau. Ecological risk assessment plays an important role in formulating environmental management strategies yet little attention to this region. In this study, we established an ecological risk assessment index system based on 30 evaluation indices in the categories of hydrometeorology, ecological environment, ground surface disturbance, and society and economy for the Gannan Plateau. An entropy method was used to calculate an index weight,and subsequently the matter-element method was used together with extension theory to establish a matter-element extension model of ecological risk. We assessed the ecological risk in this region by calculating the degree of association between index layer, system layer and target layer, and the cumulative ecological risk index. The degrees of ecological risk for the counties of the region were determined by using Arc GIS which would represent a spatial heterogeneity of the risk grade in production. Our results showed that the areas of high ecological risk were in Zhouqu County and Zhuoni County, and others were of low risk(Hezuo City, Diebu County, Xiahe County and Lintan County) or intermediate risk(Maqu County). The results of the assessment were in accord with the actual observed situation. Thus, our ecological risk assessment index system is appropriate for this region and suggests that high risk counties need a priori ecological protection. Such research could provide a technological support which would potentially prevent or reduce disasters by establishing an ecological barrier to promote the sustainable development of Gannan Plateau. 展开更多
关键词 MATTER-ELEMENT Extension theory Ecological risk assessment ECOSYSTEM GannanPlateau
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Percutaneous aspiration and drainage with adjuvant medical therapy for treatment of hepatic hydatid cysts 被引量:3
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作者 Mohammed I Yasawy Abdelrahman E Mohammed +2 位作者 Sammak Bassam Mohammed A Karawi Sohail Shariq 《World Journal of Gastroenterology》 SCIE CAS CSCD 2011年第5期646-650,共5页
AIM:To determine the efficacy and success of percutaneous aspiration irrigation and reaspiration(PAIR) in the management of hepatic hydatidosis.METHODS:Twenty-six patients with 32 hepatic hydatid cysts had PAIR.Twenty... AIM:To determine the efficacy and success of percutaneous aspiration irrigation and reaspiration(PAIR) in the management of hepatic hydatidosis.METHODS:Twenty-six patients with 32 hepatic hydatid cysts had PAIR.Twenty-two patients received at least 2 wk of drug therapy before the procedure was carried out to reduce the risk of recurrence from spillage during the procedure.The procedure was performed under local anesthesia with a 19-gauge 20 cm long needle,the cyst was punctured,cystic content(approximately 30 mL) was aspirated by a 12-14 F pigtail catheter and aspirated fluids were sent for analysis.Once the cyst was almost empty,two-thirds of the net amount of material aspirated was replaced by hypertonic saline and left in the cavity for about 30 min,with the catheter left in place for reaspiration of most of the fluid.When the amount of fluid drained was less than 10 mL per 24 h,the drainage catheter was removed.RESULTS:All 32 cysts showed evidence of immediate collapse after completion of the procedure,and before discharge from hospital,ultrasound examination showed fluid reaccumulation in all cysts.Serial follow-up showed a progressive decrease in the size and change in the appearance of cysts.To confirm the sterility of these cystic cavities,seven cysts were reaspirated on average 3 mo after the procedure.Investigations revealed no viable scolices.CONCLUSION:PAIR using hypertonic saline is very effective and safe with proper precautions. 展开更多
关键词 Percutaneous aspiration irrigation and reaspi-ration Hepatic hydatid cyst Adjuvant medical therapy Treatment outcome
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Chemical ablation of the gallbladder using alcohol in cholecystitis after palliative biliary stenting 被引量:1
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作者 Tae Hoon Lee Sang-Heum Park +5 位作者 Sang Pil Kim Ji-Young Park Chang Kyun Lee Il-Kwun Chung Hong Soo Kim Sun-Joo Kim 《World Journal of Gastroenterology》 SCIE CAS CSCD 2009年第16期2041-2043,共3页
Chemical ablation of the gallbladder is effective in patients at high risk of complications after surgery. Percutaneous gallbladder drainage is an effective treatment for cholecystitis; however, when the drain tube ca... Chemical ablation of the gallbladder is effective in patients at high risk of complications after surgery. Percutaneous gallbladder drainage is an effective treatment for cholecystitis; however, when the drain tube cannot be removed because of recurrent symptoms, retaining it can cause problems. An 82-year-old woman presented with cholecystitis and cholangitis caused by biliary stent occlusion and suspected tumor invasion of the cystic duct. We present successful chemical ablation of the gallbladder using pure alcohol, through a percutaneous gallbladder drainage tube, in a patient who developed intractable cholecystitis with obstruction of the cystic duct after receiving a biliary stent. Our results suggest that chemical ablation therapy is an effective alternative to surgical therapy for intractable cholecystitis. 展开更多
关键词 Percutaneous cholecystostomy CHOLECYSTITIS Biliary stenting ALCOHOL Chemical therapy
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Increased Browning of Woody Vegetation due to Continuous Seasonal Droughts in Yunnan Province, China
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作者 CHEN Hong-Ping JIA Gen-Suo +1 位作者 FENG Jin-Ming DONG Yan-Sheng 《Atmospheric and Oceanic Science Letters》 CSCD 2014年第2期120-125,共6页
In this paper, based on the analysis of satellite measurements, the authors conclude that the continuous seasonal droughts intensify the browning of woody vegetation and that evergreen needleleaf forest(ENF) shows a l... In this paper, based on the analysis of satellite measurements, the authors conclude that the continuous seasonal droughts intensify the browning of woody vegetation and that evergreen needleleaf forest(ENF) shows a larger browning percentage than other woody vegetation types over Yunnan Province. Based on the Tropical Rainfall Measuring Mission(TRMM) precipitation standardized anomaly, in the dry season, which is from October to March, the 2010 drought affected an area of Yunnan Province 1.77 times larger than the 2012 drought, but in the post-drought months(April to June), the browning area of all woody vegetation in 2012 was 1.11 times larger than that in 2010 on the basis of the enhanced vegetation index(EVI) standardized anomaly. The reduction of vegetation greenness over large areas of Yunnan Province represents a photosynthetic capacity loss which will have an impact on carbon fluxes to the atmosphere. 展开更多
关键词 Yunnan Province DROUGHT enhanced vegetation index woody vegetation standard anomaly
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DESIGN AND EVALUATION OF A PIPELINED FORWARDING ENGINE 被引量:1
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作者 Li Yufeng Chen Yue Lan Julong 《Journal of Electronics(China)》 2007年第2期157-162,共6页
Recent advances in broadband technology have caused forwarding engines to handle pack- ets with over 10 gigabit per second. In this paper, we present a high-speed forwarding pipeline which can finish all of the routin... Recent advances in broadband technology have caused forwarding engines to handle pack- ets with over 10 gigabit per second. In this paper, we present a high-speed forwarding pipeline which can finish all of the routing and forwarding tasks in the way of pipelining. We also establish the analysis model of the pipeline with which one can evaluate some key performance parameters of the forwarding engine such as forwarding rate and forwarding delay. We find that the pipeline is of good scalability and can forward unicast packets up to the speed of 40Gbit/s. 展开更多
关键词 DESIGN Forwarding engine PIPELINE Evaluate
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