维普中文期刊产品整合服务
5935篇 您的检索式:作者名="Robins"
    题名 作者 年代 出处 被引量
1基于熵权TOPSIS模型的区域土地利用绩效评价及障碍因子诊断显示文摘定量评估土地利用绩效并诊断其障碍因子,是提高区域土地利用绩效水平的有效途径。该文综合考虑土地利用经济绩效、社会绩效、生态绩效和管理绩效4个子系统,建立区域土地利用绩效评价指标体系,结合熵权TOPSIS模型和障碍度模型,对安徽省近15 a(2000—2014年)的土地利用情况进行绩效评价和障碍因子诊断,并基于评价结果,运用GM(1,1)模型对安徽省未来5 a(2015—2019年)土地利用子系统绩效变化态势进行预测和分析。结果表明:安徽省土地利用综合绩效经历了较差—中级—良好—优质的发展过程,结合土地利用绩效的年均增长速度,可以分为绩效较差但高速增长(2000—2004年)、绩效中级但较快增长(2005—2009年)、绩效良好但低速增长(2010—2011年)和绩效优质且快速增长(2008—2014年)4个发展阶段。4个子系统绩效水平基本逐年提升,但变化趋势存在差异,经济绩效和管理绩效呈线性增长态势,社会绩效和生态绩效呈波动起伏变化的上升趋势;未来5 a,经济绩效子系统年均增长速度最快,社会绩效和管理绩效子系统次之,生态绩效子系统增速最慢。经济绩效子系统障碍度最大,其后依次是社会、生态和管理绩效子系统;2000—2008年,建成区工业增加值等3个指标一直稳居前3位,人民生活水平和地均就业人数轮流出现在第4或第5位;2009—2012年,前3位障碍因子发生较大变化,地均财政收入和人民生活水平成为阻碍土地利用绩效的主要因子;2013—2014年,前5位障碍因子变化较大,社会绩效成为制约土地利用绩效的主要子系统,改善人民生活水平、加强公共基础设施建设,探索节约化、集约化、高效化的土地利用方式和模式是提升安徽省土地利用绩效的重要出路;根据GM(1,1)模型预测结果,社会绩效、生态绩效和管理绩效在未来具有广阔的提升空间,安徽省在提高土地利用经济绩效的同时,应关注经济—社会—生态环境友好和谐发展,更加注重土地利用社会绩效、管理绩效特别是生态绩效的提升。该文的研究思路与方法可以为促进区域土地利用绩效提升提供现实依据。雷勋平 Robin Qiu 刘勇 2016农业工程学报2016,32,13:145
2喀喇昆仑断裂的变形特征及构造演化显示文摘喀喇昆仑断裂的变形特征、形成时代、构造演化以及它的构造意义一直存在着争议。在喀喇昆仑断裂东南段阿伊拉日居山地区,沿断裂出露具右旋剪切应变的糜棱岩和糜棱岩化片麻岩-花岗岩,显微构造研究表明其存在高温右旋剪切变形特征,并伴随淡色同构造花岗岩的产生,同构造结晶锆石所记录的U-Pb同位素年龄,暗示了喀喇昆仑断裂的形成时代在23-25Ma以前,其连续变形作用持续到-12Ma,之后伴随阿伊拉日居山的快速隆升以及噶尔盆地开始形成。综合分析表明喀喇昆仑断裂生长过程可能是由南东向北西扩展的过程,是印度板块与欧亚大陆持续碰撞的结果。断裂的累积位移量至少为280km,其长期平均滑移速率约为11mm/a。通过块体间运动学分析,表明在-23-25Ma以后青藏高原物质以约16.2mmn/a的速率向-N108°方向挤出。李海兵 Franck Valli 许志琴 杨经绥 Paul Tapponnier Robin Lacassin 陈松永 戚学祥 Marie-Luce Chevalier 2006中国地质2006,33,2:64
3肛裂临床诊治指南(第三次修订)显示文摘“美国结直肠外科医师协会(American Societyof ColonandRectal Surgeons.ASCRS)”(协会)致力于推进结直肠和肛门疾病的相关理论以及预防和诊疗水平的提高,给患者提供优质的医疗服务。“标准委员会”由协会中在结直肠外科方面有显著专长的成员组成。该委员会的建立是为了引领国际结直肠和肛门疾病诊治的发展,以建立具有循证医学证据的临床诊疗指南。指南是涵盖性的,非指令性的,目的是为临床决策提供信息,而非具体的治疗方法。指南适用于所有相关的医护人员以及希望得到相应指南中疾病的相关诊治信息的患者。Farshid Araghizadeh ~ Robin Boushey Sridhar Chalasani George Chang Robert Cima Gary Dunn Daniel Feingold Philip Fleshner Daniel Geisler Jill Genua Sharon Gregorcyk Daniel Herzig Andreas Kaiser Ravin Kumar David Larson Steven Mills John Monson P. Terry Phang Feza Remzi David Rivadeneira Howard Ross Peter Senatore Elin Sigurdson Thomas Stahl Scott Steele Scott Strong Charles Tement Judith Trudel Madhulika Varnna Martin Weiser 丁义江(译) 皇甫少华(译) 丁曙晴(译) 2013中华胃肠外科杂志2013,16,7:70
4Models and estimators linking individual-based and sample-based rarefaction, extrapolation and comparison of assemblages显示文摘Aims In ecology and conservation biology,the number of species counted in a biodiversity study is a key metric but is usually a biased underestimate of total species richness because many rare species are not detected.Moreover,comparing species richness among sites or samples is a statistical challenge because the observed number of species is sensitive to the number of individuals counted or the area sampled.For individual-based data,we treat a single,empirical sample of species abundances from an investigator-defined species assemblage or community as a reference point for two estimation objectives under two sampling models:estimating the expected number of species(and its unconditional variance)in a random sample of(i)a smaller number of individuals(multinomial model)or a smaller area sampled(Poisson model)and(ii)a larger number of individuals or a larger area sampled.For sample-based incidence(presence–absence)data,under a Bernoulli product model,we treat a single set of species incidence frequencies as the reference point to estimate richness for smaller and larger numbers of sampling units.Methods The first objective is a problem in interpolation that we address with classical rarefaction(multinomial model)and Coleman rarefaction(Poisson model)for individual-based data and with sample-based rarefaction(Bernoulli product model)for incidence frequencies.The second is a problem in extrapolation that we address with sampling-theoretic predictors for the number of species in a larger sample(multinomial model),a larger area(Poisson model)or a larger number of sampling units(Bernoulli product model),based on an estimate of asymptotic species richness.Although published methods exist for many of these objectives,we bring them together here with some new estimators under a unified statistical and notational framework.This novel integration of mathematically distinct approaches allowed us to link interpolated(rarefaction)curves and extrapolated curves to plot a unified species accumulation curve for empirical examples.We provide new,unconditional variance estimators for classical,individual-based rarefaction and for Coleman rarefaction,long missing from the toolkit of biodiversity measurement.We illustrate these methods with datasets for tropical beetles,tropical trees and tropical ants.Important Findings Surprisingly,for all datasets we examined,the interpolation(rarefaction)curve and the extrapolation curve meet smoothly at the reference sample,yielding a single curve.Moreover,curves representing 95%confidence intervals for interpolated and extrapolated richness estimates also meet smoothly,allowing rigorous statistical comparison of samples not only for rarefaction but also for extrapolated richness values.The confidence intervals widen as the extrapolation moves further beyond the reference sample,but the method gives reasonable results for extrapolations up to about double or triple the original abundance or area of the reference sample.We found that the multinomial and Poisson models produced indistinguishable results,in units of estimated species,for all estimators and datasets.For sample-based abundance data,which allows the comparison of all three models,the Bernoulli product model generally yields lower richness estimates for rarefied data than either the multinomial or the Poisson models because of the ubiquity of non-random spatial distributions in nature.Robert K.Colwell Anne Chao Nicholas J.Gotelli Shang-Yi Lin Chang Xuan Mao Robin L.Chazdon John T.Longino 2012Journal of Plant Ecology2012,5,1:37
5Shapley值法的改进及其应用研究显示文摘为了求解没有哑元的合作对策问题,以经典Shapley值法为基础,提出了改进的Shapley值求解模型,并通过证明和推理对该改进Shapley值解进行了描述和刻画,结果表明:改进的Shapley函数和经典Shapely函数在形式上具有一致性,可以认为:改进的Shapley函数是经典Shapely函数在模糊领域的一个自然延续和拓展。在此基础上,以单个制造商、单个分销商和单个零售商构成的三级供应链为背景,将改进Shapley值法运用到其利润分配问题中,并用一个算例说明了该改进Shapley解的实用性和可行性。雷勋平 Robin Qiu 2012计算机工程与应用2012,48,7:29
6喀喇昆仑断裂的形成时代:锆石SHRIMP U-Pb年龄的制约显示文摘喀喇昆仑断裂的形成时代对青藏高原形成演化、变形过程的研究具有重要意义.在断裂东南段阿伊拉日居山地区,沿断裂出露具高温右旋剪切应变特征的糜棱岩和糜棱岩化片麻岩-花岗岩,因此,利用变形岩石中锆石的SHRIMP U-Pb年龄来制约断裂的形成时代和变形历史.变形岩石中同构造结晶锆石的U-Pb同位素年龄,暗示了喀喇昆仑断裂的形成时代至少为距今约27Ma以前,比前人观点至少早约10Ma;大规模的高温右旋剪切活动至少在距今27~20Ma期间,并且伴随同构造淡色花岗岩的产生;剪切变形过程中伴随大量热液流体作用时限至少在距今25-13Ma期间.喀喇昆仑断裂的生长可能是由南东向北西扩展的过程,是印度板块与欧亚大陆持续碰撞的结果.李海兵 Franck Valli 刘敦一 许志琴 杨经绥 Nicolas Arnaud Paul Tapponnier Robin Lacassin 陈松永 戚学祥 2007科学通报2007,52,4:26
7指南2.0:为成功制定指南而系统研发的全面清单显示文摘背景虽然当前已有一些评估卫生保健指南可靠性的工具,但仍缺乏针对制定指南实际步骤的指导。针对指南制定者们所需考虑的相关资源和工具,我们系统研发了一份全面的条目清单,但这并不意味着每篇指南都需遵守该清单的所有条目。方法我们检索了国际指南制定机构的指南制定手册、指南的指南(主要是来自国际和国家机构以及专业学会的方法学报告),以及提供系统指导的最新文章。经过反复评价这些资料,尽可能全面地罗列和提取条目,并制定与指南有关的重要主题。通过反复讨论,我们对条目进行评价以去重和补漏,同时邀请指南制定专家对所增加的条目进行修改并提出建议。结果我们制定了一份包含18个主题、146个条目的清单,并建立了帮助指南制定者应用这些条目的网站。这些主题和条目涵盖了指南从规划、完成、实施和评估的全过程。最终的清单版本也包括了培训所需的资料以及应用这些条目时用到的方法学参考文献的链接。解释本清单将提供给指南制定者用作参考。仔细考虑清单中的条目将有助于指南的制定、实施和评估,我们也将会通过大众反馈来修订并持续更新清单。Holger J. Schunemann Wojtek Wiercioch Itziar Etxeandia Maicon Falavigna Nancy Santesso Reem Mustafa Matthew Ventresca Romina Brignardello-petersen] Kaja-Triin Laisaar Sergio Kowalski Tejan Baldeh Yuan Zhang Uiia Raid Ignacio Neumann Susan L. Norris Judith Thornton Robin Harbour Shaun Treweek Gordon Guyatt Pablo Alonso-Coello Marge Reinap Jan Brozek Andrew Oxman Elie A. Akl 2014中国循证医学杂志2014,14,9:26
8Changing face of hepatic encephalopathy:Role of inflammation and oxidative stress显示文摘The face of hepatic encephalopathy(HE) is changing.This review explores how this neurocognitive disorder,which is associated with both acute and chronic liver injury,has grown to become a dynamic syndrome that spans a spectrum of neuropsychological impairment,from normal performance to coma.The central role of ammonia in the pathogenesis of HE remains incontrovertible.However,over the past 10 years,the HE community has begun to characterise the key roles of inflammation,infection,and oxidative/nitrosative stress in modulating the pathophysiological effects of ammonia on the astrocyte.This review explores the current thoughts and evidence base in this area and discusses the potential role of existing and novel therapies that might abrogate the oxidative and nitrosative stresses inflicted on the brain in patients with,or at risk of developing,HE.Amit S Seyan Robin D Hughes Debbie L Shawcross 2010World Journal of Gastroenterology2010,16,27:23
9基于供应链和可拓决策的食品安全预警模型及其应用显示文摘为提高食品安全预警能力,改善食品安全状况,以食品原料供应环境质量、生产加工、流通加工、销售食品质量、食品安全管理与监测作为食品安全预警的关键因素,提出一种基于供应链和可拓决策的食品安全预警模型。从供应链的角度建立食品安全预警指标体系,确定食品安全的经典域、节域和预警对象;建立食品安全预警模型并给出食品安全预警的方法和步骤;结合A省2010年的食品安全数据,定量评价A省食品安全预警状态,结合模型评价结果进行单指标和综合安全预警分析,验证该模型的合理性和适用性。研究结果表明:针对食品安全状况与预警特征,运用基于供应链和可拓决策的食品安全预警模型,能够对食品安全状态进行快速判断并有效预警。雷勋平 Robin Qiu 吴杨 2011中国安全科学学报2011,21,11:22
10土地集约利用与城镇化协调发展评价及障碍因子诊断显示文摘为了探究土地集约利用与城镇化的耦合协调关系,促进两者协调发展,以安徽省为例,首先,运用熵权TOPSIS模型,分别评价安徽省2000—2017年土地集约利用与城镇化绩效水平,研判两者的绩效水平及其子系统变化趋势;然后,运用耦合度和协调度模型,基于耦合作用系数的取值变化,探讨不同情形下安徽省土地集约利用与城镇化协调发展关系及变化趋势;最后,运用障碍度模型,诊断影响安徽省土地集约利用与城镇化协调发展的障碍因子。结果表明:2000—2017年,安徽省土地集约利用与城镇化水平均呈逐年上升态势,稳中趋好。2000—2017年安徽省土地集约利用绩效水平从0.0536增至0.9587,年均增长18.49%;安徽省城镇化水平从0.2715增至0.8180,年均增长6.70%。从土地集约利用各子系统来看,经济绩效子系统对土地集约利用的贡献最大,生态绩效子系统对土地集约利用的贡献最小,权重分别为0.3526和0.1308;从城镇化各子系统来看,经济城镇化子系统对城镇化水平影响最大,生态城镇化子系统对城镇化水平影响最小,权重分别为0.4160和0.1377。在不同耦合作用系数取值情形下,安徽省土地集约利用与城镇化协调发展关系变化趋势除2005年和2012年略有不同外,其余16年两者协调发展变化趋势和协调类型完全相同,说明耦合作用系数对两者协调发展关系的影响十分有限。2000—2017年安徽省土地集约利用与城镇化的协调发展度呈逐年增长态势。从各子系统障碍度来看,土地集约利用经济子系统对安徽省土地集约利用与城镇化协调发展的影响最大,年均障碍度为16.48%;生态城镇化子系统对两者协调发展的影响最小,年均障碍度为6.60%。从各指标障碍度来看,2011年及以前,影响两者协调发展的障碍因子主要包括人民生活水平、地均财政收入和人均GDP;2012年及以后,影响两者协调发展的障碍因子主要包括城乡人均可支配收入差距和城镇人口密度。从各年份前5位障碍因子变化来看,各指标对土地集约利用与城镇化协调发展的影响可以分为2个阶段:第1阶段(2000—2013年)以土地集约利用的影响为主,第2阶段(2014—2017年)以城镇化的影响为主。本研究为研判土地集约利用与城镇化协调发展水平及诊断障碍因子提供了新的思路和方法,可为促进安徽省及同类省域土地集约利用与城镇化协调发展提供借鉴。雷勋平 QIU Robin 刘晨 2020农业机械学报2020,51,6:22
11基于熵权可拓决策模型的科技竞争力评价研究——以中部六省为例显示文摘科技竞争力是国家竞争力的重要构成,进行科技竞争力评价是提高科技竞争力的有效途径。针对科技竞争力的影响因素,基于科技投入、科技产出与科技对社会经济的贡献3个维度,运用可拓学思想,结合信息熵的基本原理,构建了基于熵权可拓决策的科技竞争力评价模型。结合中部六省2009年的科技竞争力数据展开实证研究,分析了该模型在区域科技竞争力评价中的应用。雷勋平 Robin Qiu 2013科技进步与对策2013,30,3:21
12审计软件现状及发展趋势研究显示文摘计算机辅助审计是目前审计领域研究与应用的一个热点。为了开展计算机辅助审计,一些审计软件被设计出来。结合国内外开展计算机辅助审计的现状,分析了国内外常用审计软件的分类、特点及功能,并从功能上对国内外审计软件进行了比较。在此基础上,分析了审计软件的发展趋势,从而为我国研究与应用审计软件提供了理论和实践上的指导与帮助。陈伟 QIU Robin 2009计算机科学2009,36,2:19
13WJBC 5^(th) Anniversary Special Issues(2): Proteomics In 2014, can we do better than CA125 in the early detection of ovarian cancer?显示文摘Ovarian cancer is a lethal gynecologic malignancy with greater than 70% of women presenting with advanced stage disease. Despite new treatments, long term outcomes have not significantly changed in the past 30 years with the five-year overall survival remaining between 20% and 40% for stage Ⅲ and Ⅳ disease. In contrast patients with stage Ⅰ disease have a greater than 90% five-year overall survival. Detection of ovarian cancer at an early stage would likely have significant impact on mortality rate. Screening biomarkers discovered at the bench have not translated to success in clinical trials. Existing screening modalities have not demonstrated survival benefit in completed prospective trials. Advances in high throughput screening are making it possible to evaluate the development of ovarian cancer in ways never before imagined. Data in the form of human '-omes' including the proteome, genome, metabolome, and transcriptome are now available in various packaged forms. With the correct pooling of resources including prospective collection of patient specimens, integration of high throughput screening, and use of molecular heterogeneity in biomarker discovery, we are poised to make progress in ovarian cancer screening. This review will summarize current biomarkers, imaging, and multimodality screening strategies in the context of emerging technologies.Joshua G Cohen Matthew White Ana Cruz Robin Farias-Eisner 2014World Journal of Biological Chemistry2014,5,3:18
14基于SOA的分布式服务供应链信息共享平台研究与实践显示文摘以SOA理论体系为出发点,提出了基于企业服务总线(enterprise service bus,ESB)的分布式服务供应链信息共享平台的体系结构,并分析了该信息共享平台建设的生命周期。进一步采用案例分析的研究方法,以企业信息系统设计项目与IBM高校合作项目为例子,探讨了分布式服务供应链信息共享平台的服务建模过程,并设计和开发了一个分布式服务供应链信息共享平台。沈惠璋 赵继娣 QIU Robin 2010计算机应用研究2010,27,2:17
15对就地养老的反思——“人”与“地方”关系视角显示文摘在有关养老的老年学和地理学研究中,'就地养老'是一个广泛使用的概念,并一直被认为是解决老龄人口养老需求的有效政策手段。迄今为止,关于就地养老的研究主要关注了很多能够让老年人健康就地(或在家)养老的物质方面的因素,比如住房条件或家庭照护。有些老年学研究者们认识到,就地养老受到居住环境中实体环境和社会、情感因素的共同影响。但我们认为,在养老体验研究中,要更加深入地审视'人'和'地方'之间的复杂关系。特别是,我们主张就地养老成功的因素是地方具有维持良好关系的潜力。提到'地方(place)'一词的时候,人们过分局限于关注老年人身体上接近的地理空间,或是具有实体边界的地方,例如房子或社区。而我们通过回顾现有文献发现,对许多选择就地养老的人来说,更具有意义的是随着时间的推移,他们在不同空间尺度上所建立起来的多元的、网络化的社会和非社会关系。基于这个新的视角,可以更好地理解老年人与地方的多层次的联系,以及从不同尺度和不同类型的人与地方的关系来考察就地养老的意义。Alexandra BOYLE Janine L.WILES Robin A.KEARNS 2015地理科学进展2015,34,12:17
16Model for end-stage liver disease score versus Child score in predicting the outcome of surgical procedures in patients with cirrhosis显示文摘AIM:To determine factors affecting the outcome of patients with cirrhosis undergoing surgery and to compare the capacities of the Child-Turcotte-Pugh(CTP) and model for end-stage liver disease(MELD)score to predict that outcome. METHODS:We reviewed the charts of 195 patients with cirrhosis who underwent surgery at two teaching hospitals over a five-year period.The combined endpoint of death or hepatic decompensation was considered to be the primary endpoint. RESULTS:Patients who reached the endpoint had a higher MELD score,a higher CTP score and were more likely to have undergone an urgent procedure.Among patients undergoing elective surgical procedures,no statistically significant difference was noted in the mean MELD(12.8±3.9 vs 12.6±4.7,P=0.9)or in the mean CTP(7.6±1.2 vs 7.7±1.7,P=0.8)between patients who reached the endpoint and those who did not.Both mean scores were higher in the patients reaching the endpoint in the case of urgent procedures(MELD:22.4± 8.7 vs 15.2±6.4,P=0.0007;CTP:9.9±1.8 vs 8.5±1.8, P=0.008).The performances of the MELD and CTP scores in predicting the outcome of urgent surgery were only fair,without a significant difference between them (AUC=0.755±0.066 for MELD vs AUC=0.696±0.070 for CTP,P=0.3). CONCLUSION:The CTP and MELD scores performedequally,but only fairly in predicting the outcome of urgent surgical procedures.Larger studies are needed to better define the factors capable of predicting the outcome of elective surgical procedures in patients with cirrhosis.Maarouf A Hoteit Amaar H Ghazale Andrew J Bain Eli S Rosenberg Kirk A Easley Frank A Anania Robin E Rutherford 2008World Journal of Gastroenterology2008,14,11:16
17The dynamics of the piglet gut microbiome during the weaning transition in association with health and nutrition显示文摘Background: Understanding the composition of the microbial community and its functional capacity during weaning is important for pig production as bacteria play important roles in the pig's health and growth performance. However,limited information is available regarding the composition and function of the gut microbiome of piglets in early-life.Therefore, we performed 16 S rRNA gene and whole metagenome shotgun sequencing of DNA from fecal samples from healthy piglets during weaning to measure microbiome shifts, and to identify the potential contribution of the early-life microbiota in shaping piglet health with a focus on microbial stress responses, carbohydrate and amino acid metabolism.Results: The analysis of 16 S rR NA genes and whole metagenome shotgun sequencing revealed significant compositional and functional differences between the fecal microbiome in nursing and weaned piglets. The fecal microbiome of the nursing piglets showed higher relative abundance of bacteria in the genus Bacteroides with abundant gene families related to the utilization of lactose and galactose. Prevotel a and Lactobacil us were enriched in weaned piglets with an enrichment for the gene families associated with carbohydrate and amino acid metabolism. In addition, an analysis of the functional capacity of the fecal microbiome showed higher abundances of genes associated with heat shock and oxidative stress in the metagenome of weaned piglets compared to nursing piglets.Conclusions: Overal, our data show that microbial shifts and changes in functional capacities of the piglet fecal microbiome resulted in potential reductions in the effects of stress, including dietary changes that occur during weaning.These results provide us with new insights into the piglet gut microbiome that contributes to the growth of the animal.Robin B.Guevarra Sang Hyun Hong Jin Ho Cho Bo-Ra Kim Jiwon Shin Jun Hyung Lee Bit Na Kang Young Hwa Kim Suphot Wattanaphansak Richard E.Isaacson Minho Song Hyeun Bum Kim 2018Journal of Animal Science and Biotechnology2018,9,4:16
18一种基于数据匹配技术的审计证据获取方法显示文摘联网审计是目前计算机辅助审计领域中的一个研究前沿问题。本文针对我国目前研究的联网审计的特点,以及常用审计方法的不足,提出了一种基于数据匹配技术的审计证据获取方法。该方法通过对两个数据源中的被审计数据进行数据匹配,查找相似重复实体,发现审计线索,获得审计证据。此外,采用模拟数据从定量的角度对该方法的审计风险进行了分析。最后,以一个实例验证了该方法的有效性及实用价值。研究表明:和常用的审计方法相比,该方法对业务知识依赖少,易发现被审计数据中的隐藏信息,并提高了审计效率。陈伟 Robin Qiu 刘思峰 2008计算机科学2008,35,8:16
19改进的WEAP模型在水资源管理中的应用显示文摘在水资源评价和规划模型(WEAP)的基础上耦合多边形网格地下水三维流有限差分模拟系统,建立了WEAP-Tsinghua模型。该模型既能反映各水文测站的径流情况和水资源供需关系与分配,也能反映地下水位动态变化。以石羊河流域为例,建立了该流域的水资源管理模型,并利用2000年用水结构、水文测站径流数据和地下水位观测数据进行参数率定和模型验证,模拟和实测地下水水头差值小于1.0m的观测孔达到总监测点数的50%,模拟和实测蔡旗同金川峡站流量年误差小于1%,模拟的用水结构符合实际,预测分析说明石羊河流域现状用水模式不合理。改进WEAP模型具有友好的用户界面和易于使用的功能,可用于区域水资源规划模拟分析。胡立堂 王忠静 Robin Wardlaw 梁友 2009水利学报2009,39,2:15
20Portal hypertension: Imaging of portosystemic collateral pathways and associated image-guided therapy显示文摘Portal hypertension is a common clinical syndrome, defined by a pathologic increase in the portal venous pressure. Increased resistance to portal blood flow, the primary factor in the pathophysiology of portal hypertension, is in part due to morphological changes occurring in chronic liver diseases. This results in rerouting of blood flow away from the liver through collateral pathways to low-pressure systemic veins. Through a variety of computed tomographic, sonographic, magnetic resonance imaging and angiographic examples, this article discusses the appearances and prevalence of both common and less common portosystemic collateral channels in the thorax and abdomen. A brief overview of established interventional radiologic techniques for treatment of portal hypertension will also be provided. Awareness of the various imaging manifestations of portal hypertension can be helpful for assessing overall prognosis and planning proper management.Murad Feroz Bandali Anirudh Mirakhur Edward Wolfgang Lee Mollie Clarke Ferris David James Sadler Robin Ritchie Gray Jason Kam Wong 2017World Journal of Gastroenterology2017,23,10:14
返回顶部 每页显示:
共297页 首页 上一页 第1页 下一页 末页 /297 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费