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11622篇 您的检索式:作者名="Vincente"
    题名 作者 年代 出处 被引量
1圆弧形沉积河谷场地在平面P波入射下的响应显示文摘利用Fourier-Bessel级数展开法,在频域内给出了圆弧形沉积河谷场地在平面P波入射下动力响应的一个解析解,并分析了入射波波长、入射角度与河谷宽度、深度等因素对动力响应的影响。梁建文 严林隽 李军伟 Vincent W.Lee 2001岩土力学2001,22,2:52
2负压自动补给灌溉原理及可行性试验研究显示文摘本文提出了一种新型的负压节水灌溉技术,系统在水源高程低于灌水器高程(供水水头为负值)情况下,无需动力加压设备,自动补给实现灌溉作业。理论分析了负压灌溉的基本原理。试验研究了水源与灌水器间不同高程差(H)对灌水效果的影响,试验结果表明:累计入渗量、最大水平和垂直湿润距离随时间呈幂函数变化关系,随高程差呈指数变化关系,相关系数均非常高;湿润锋开始时运移较快,等时间线较稀疏,后来运移变慢,等时间线变密,湿润体近似为椭球体。理论上和试验均说明只要灌水器与水源的高差不超过一定范围,负压灌溉是可行的。雷廷武 江培福 Vincent F.Bralts 肖娟 2005水利学报2005,36,3:45
3地下圆形衬砌隧道对沿线地震动的影响(II):数值结果显示文摘利用地下圆形衬砌隧道对入射平面P波和SV波散射级数解答,定量分析了入射波长、入射角度、隧道直径、衬砌刚度等因素对沿线地表位移放大作用的影响。计算结果表明,当入射频率较低时,地下隧道的存在对地表位移幅值影响不大;而当入射频率较高时,地表位移幅值可以达到无隧道情况的4.5倍以上;衬砌情况下地表位移幅值可以高出非衬砌情况的87.8%。建议在地铁的规划设计中考虑地下隧道的建设对隧道沿线设计地震动的影响。梁建文 纪晓东 Vincent W Lee 2005岩土力学2005,26,5:43
4圆弧形层状沉积河谷场地在平面SH波入射下动力响应分析显示文摘利用Fourier Bessel级数展开法在频域内给出了圆弧形层状沉积河谷场地对平面SH波放大作用的一个解析解 。梁建文 张郁山 顾晓鲁 Vincent W.Lee 2000岩土工程学报2000,22,4:42
5中国城市养老机构的兴起:发展与公平问题显示文摘利用2009-2010年在南京市和天津市对养老机构的调查数据,描述了养老机构在两市的发展态势,比较了公办和民办机构在入住老人的健康状况及机构特征方面的差异。近10年来养老机构在两市迅猛增长,且以民办机构为主导。政府财政投入在两市公办机构的日常收入来源中占了相当的比重,而对民办机构的财政补贴则微乎其微。公办机构平均规模较大,在入住率上也远超民办机构。两市公办机构入住老人比民办机构入住老人在总体上更健康。公办机构在决定收住对象时比民办机构有更强的选择性。公众在享有现存养老机构资源时面临着机会不平等的问题。政府应确保在公办机构中公平、合理地分配公共服务资源,以最大程度地彰显其公益性,同时也应着力扶持民办机构,促进二者在社会化养老服务中公平竞争、协调发展。冯占联 詹合英 关信平 风笑天 刘畅 Vincent Mor 2012人口与发展2012,18,6:44
6圆弧形层状凹陷地形对平面SH波的散射显示文摘利用 Fourier- Bessel级数展开法给出了圆弧形层状凹陷地形对平面 SH波散射二维问题的一个解析解 ,分析了层状凹陷地形沉积排列顺序、软夹层刚度和厚度等因素对 SH波散射的影响。结果表明 ,层状凹陷地形对平面 SH波的散射和单一凹陷地形差别很大 ,凹陷地形表面松软沉积的存在 ,即使厚度很薄 ,也会大大降低凹陷地形本身对入射波的屏障作用 ;层状凹陷地形中沉积排列顺序、软夹层刚度和厚度的变化对散射也具有重要影响。梁建文 张郁山 顾晓鲁 Vincent W Lee 2003振动工程学报2003,16,2:48
7Role of cytokines and chemokines in non-alcoholic fatty liver disease显示文摘Non-alcoholic fatty liver disease (NAFLD) includes a variety of histological conditions (ranging from liver steatosis and steatohepatitis, to fibrosis and hepatocarcinoma) that are characterized by an increased fat content within the liver. The accumulation/deposition of fat within the liver is essential for diagnosis of NAFLD and might be associated with alterations in the hepatic and systemic inflammatory state. Although it is still unclear if each histological entity represents a different disease or rather steps of the same disease, inflammatory processes in NAFLD might influence its pathophysiology and prognosis. In particular, non-alcoholic steatohepatitis (the most inflamed condition in NAFLDs, which more frequently evolves towards chronic and serious liver diseases) is characterized by a marked activation of inflammatory cells and the upregulation of several soluble inflammatory mediators. Among several mediators, cytokines and chemokines might play a pivotal active role in NAFLD and are considered as potential therapeutic targets. In this review, we will update evidence from both basic research and clinical studies on the potential role of cytokines and chemokines in the pathophysiology of NAFLD.Vincent Braunersreuther Giorgio Luciano Viviani Franois Mach Fabrizio Montecucco 2012World Journal of Gastroenterology2012,18,8:40
8Evaluation of antiviral activities of Houttuynia cordata Thunb.extract,quercetin,quercetrin and cinanserin on murine coronavirus and dengue virus infection显示文摘Objective:To evaluate the in vitro activities of the ethyl acetate(EA) fraction of Houttuynia cordata(H.cordata) Thunb.(Saururaceae) and three of its constituent flavonoids(quercetin.quercitrin and rutin) against murine coronavirus and dengue virus(DENV).Methods:The antiviral activities of various concentrations of the EA fraction of H.cordata and flavonoids were assessed using virus neutralization tests against mouse hepatitis virus(MHV) and DENV type 2(DENV-2).Cinanserin hydrochloride was also tested against MHV.The EA fraction of H.cordata was tested for acute oral toxicity in C57BL/6 mice.Results:The EA fraction of H.cordata inhibited viral infectivity up to 6 d.Cinanserin hydrochloride was able to inhibit MHV for only 2 d.The 50%inhibitory concentrations(IC_(50)) of the EA fraction of H.cordata added before the viral adsorption stage were 0.98 μg/mL for MHV and 7.50 μg/mL for DENV-2with absence of cytotoxicity.The mice fed with the EA fraction up to 2 000 mg/kg did not induce any signs of acute toxicity,with normal histological features of major organs.Certain flavonoids exhibited comparatively weaker antiviral activity,notably quercetin which could inhibit both MHV and DENV-2.This was followed by quercitrin which could inhibit DENV-2but not MHV,whereas rutin did not exert any inhibitory effect on either virus.When quercetin was combined with quercitrin,enhancement of anti-DENV-2 activity and reduced cytotoxicity were observed.However,the synergistic efficacy of the flavonoid combination was still less than that of the EA fraction.Conclusions:The compounds in H.cordata contribute to the superior antiviral efficacy of the EA fraction which lacked cytotoxicity in vitro and acute toxicity in vim.H.cordata has much potential for the development of antiviral agents against coronavirus and dengue infections.K.H.Chiow M.C.Phoon Thomas Putti Benny K.H.Tan Vincent T.Chow 2016Asian Pacific Journal of Tropical Medicine2016,9,1:38
9平面P波入射下地下洞室群动应力集中问题解析解显示文摘采用波函数展开法给出了半空间中洞室群在平面P波入射下动应力集中问题的一个解析解,数值结果表明,当洞室之间距离较近时,洞室之间的相互作用对地下洞室群的动应力集中具有显著的放大作用,动应力集中系数可能达到单个洞室的3.5倍以上,动应力集中系数峰值位于两个洞室相对的区域。梁建文 张浩 Vincent WLEE 2004岩土工程学报2004,26,6:34
10地下圆形衬砌隧道对沿线地震动的影响(I):级数解显示文摘利用波函数展开法,给出了地下圆形衬砌隧道对入射平面P波和SV波散射问题的一个级数解答,当衬砌与半空间介质相同时,该解答退化为文献中的无衬砌隧道的解答。级数解答为进一步定量研究隧道对入射平面P波和SV波的放大作用以及入射波长、入射角度、隧道直径和衬砌刚度等参数对隧道沿线地震动的影响奠定了理论基础。梁建文 纪晓东 Vincent W Lee 2005岩土力学2005,26,4:33
11圆弧形凹陷地形表面覆盖层对入射平面SV波的影响显示文摘利用 Fourier- Bessel级数展开法 ,给出了表面具有覆盖层的圆弧形凹陷地形对入射平面 SV波散射问题的一个解析解 ,并利用该解分析了不同深宽比凹陷地形表面覆盖层刚度和厚度对入射 SV波的影响 .结果表明 ,凹陷地形表面覆盖层的存在 ,即使厚度很薄 ,也会显著增加对入射 SV波的放大作用 ,该放大作用可达到单一凹陷地形的 2 .5倍以上 .覆盖层刚度和厚度的变化对入射平面梁建文 严林隽 Vincent W.Lee 2001地震学报2001,23,6:34
12圆弧形沉积河谷场地在平面SV波入射下的动力响应显示文摘利用Fourier-Bessel级数展开法在频域内给出了圆弧形沉积河谷场地在平面SV波入射下动力响应的一个解析解,并分析了河谷宽度、河谷深度、入射波长和入射角度等因素对动力响应的影响。梁建文 严林隽 秦东 Vincent W.Lee 2003土木工程学报2003,36,12:33
13Gestational diabetes mellitus: Challenges for different ethnic groups显示文摘Ethnicity is defined as'belonging to a social groupthat has a common national or cultural tradition'.Membership of certain ethnic groups has long been associated with increased risk of gestational diabetes mellitus(GDM).Studies that examined ethnic differences amongst women with GDM were often conducted in western countries where women from various ethnic backgrounds were represented.The prevalence of GDM appears to be particularly high among women from South Asia and South East Asia,compared to Caucasian,African-American and Hispanic communities.For some,but not all ethnic groups,the body mass index is a risk factor for the development of GDM.Even within a particular ethnic group,those who were born in their native countries have a different risk profile for GDM compared to those born in western countries.In terms of treatment,medical nutrition therapy(MNT)plays a key role in the management of GDM and the prescription of MNT should be culturally sensitive.Limited studies have shown that women who live in an English-speaking country but predominantly speak a language other than English,have lower rates of dietary understanding compared with their English speaking counterparts,and this may affect compliance to therapy.Insulin therapy also plays an important role and there appears to be variation as to the progression of women who progress to requiring insulin among different ethnicities.As for peri-natal outcomes,women from Pacific Islander countries have higher rates of macrosomia,while women from Chinese backgrounds had lower adverse pregnancy outcomes.From a maternal outcome point of view,pregnant women from Asia with GDM have a higher incidence of abnormal glucose tolerance test results post-partum and hence a higher risk of future development of type2 diabetes mellitus.On the other hand,women from Hispanic or African-American backgrounds with GDM are more likely to develop hypertension post-partum.This review highlights the fact that management needs to be individualised and the clinician should be mindful of the impact that differences in ethnicity may have on the clinical characteristics and pregnancy outcomes inwomen affected by GDM,particularly those living in Western countries.Understanding these differences is critical in the delivery of optimal antenatal care for women from diverse ethnic backgrounds.Lili Yuen Vincent W Wong 2015World Journal of Diabetes2015,6,8:29
14失能老年人的照料需求:未满足程度及其差异显示文摘我国居家社区养老服务供给缺乏相匹配的需求满足度信息。文章采用2014年中国老年人健康长寿影响因素调查数据,计算中国居家失能老人的比例与规模及其照料需求满足程度,并进一步按社会人口特征、失能程度、城乡以及地区比较失能老人中存在完全满足、部分未满足以及完全未满足的需求的比例差异。研究发现:我国有9%的居家老人失能,相当于老年人口数1200多万;41%的居家失能老人已有家人照料且完全满足其需求,54%存在部分未满足的需求,4%的居家失能老人的照料需求完全未得到满足;中/重度失能、生活来源不够用、西部以及城镇的失能老人的部分未满足的需求凸显;轻度失能、中低龄、上过学、独居、中部以及农村的失能老人是存在完全未满足需求的高风险人群。研究建议,居家社区养老服务应聚焦具有完全或部分未满足需求的居家失能老人,并且由政府优先保障需求完全未被满足的高风险人群。曹杨 MOR Vincent 2017兰州学刊2017,,11:30
15地下双洞室在SV波入射下动力响应问题解析解显示文摘采用波函数展开法给出了地下双洞室在平面 SV波入射下动力响应二维问题的一个解析解 ,数值结果表明 :当两个洞室之间距离较近时 ,洞室之间的相互作用对地下双洞室的动应力集中具有显著的放大作用 ,两个洞室情况动应力集中系数可能达到单个洞室的 5 .2倍以上 。梁建文 张浩 Vincent W Lee 2004振动工程学报2004,17,2:27
16甘草中光甘草定的提取和抗氧化活性研究显示文摘从光果甘草(Glycyrrhiza glabra L.)丙酮提取物中分离得到黄酮类单体成分-光甘草定(Glabridin),并对其抗氧化生物活性进行观察研究。以肝脏微粒体中的细胞色素P450/NADPH氧化系统作为体外抗氧化实验模型。微粒体中自由基诱发程度由探针物DCFH-DA的氧化产物DCF的浓度进行检测。以银杏叶提取物EGB761用作阳性对照物。结果显示,光甘草定以0.10,0.25和0.5 mg/mL浓度,分别抑制自由基浓度67%、73%和83%。在较低浓度时,其抗氧化活性强度与EGB761类似。以上结果说明,光甘草定在细胞色素P450/NADPH氧化系统中具有强抗自由基氧化作用。木合布力.阿布力孜 热娜.卡斯木 马淑燕 Vincent loppinet Gérard siest 2007天然产物研究与开发2007,19,4:27
17Obesity leads to higher risk of sperm DNA damage in infertile patients显示文摘在在富饶上的男营养的影响的过去几年有成长兴趣。不孕被连接了到男过重或肥胖,并且常规精液参数值似乎在高身体团索引(BMI ) 的情况下被改变。在精子 DNA 正直上估计 BMI 的影响的一些研究被出版了,但是他们没导致强壮的一致。我们的目的是进一步探索在精子 DNA 正直和 BMI 之间的关系,通过 3 年的 multicentre 研究。在 subfertile 夫妇的 330 个男搭挡被包括。用标记的终端 uridine 刻痕结束(TUNEL ) 试金,我们在肥胖的人观察了精子 DNA 损坏的增加的率(机会比率(95 %信心间隔) :2.5 (1.2-5.1 )) 。Charlotte Dupont Celine Fauret Nathalie Sermondade Marouane Boubaya Florence Eustache Patrice Clement Pascal Briot Isabelle Berthaut Vincent Levy Isabelle Cedrin-Durnerin Brigitte Benzacken Pascale Chavatte-Palmer Rachel Levy 2013Asian Journal of Andrology2013,15,5:27
18圆弧形凹陷地形表面覆盖层对入射平面P波的影响显示文摘利用Fourier Bessel级数展开法给出了表面具有覆盖层的圆弧形凹陷地形对入射平面P波散射问题的一个解析解 ,并利用该解分析了不同形状凹陷地形表面覆盖层刚度和厚度对入射P波的影响 .结果表明 ,凹陷地形表面覆盖层的存在 ,即使厚度很薄 ,对入射P波的散射也具有很大影响 ,覆盖层刚度和厚度的变化可显著改变凹陷地形场地的动力特性 .梁建文 严林隽 Vincent W Lee 2002固体力学学报2002,23,4:28
19土壤质地和灌水器材料对负压灌溉出水流量及土壤水运移的影响显示文摘负压灌溉法是一种新近提出的节水灌溉技术,灌溉时供水水头为“负值”,即灌溉水源高程低于灌水器高程。不同材料灌水器和土壤质地是影响灌溉系统出水流量及土壤水运移的重要因素。该文研究了在高程差H为-0.5 m情况下两种灌水器及两种质地土壤对两者的影响。结果表明:灌水器相同时,累计入渗量、水平和垂直最大湿润距离随时间呈幂函数关系变化;在历时相同时黏壤土较砂壤土大;湿润体近似为六分之一的竖直椭球体,但黏壤土水平与垂直最大湿润距离之比大于砂壤土。土壤质地相同时,纤维灌水器较陶土灌水器出水流量高。试验结果进一步证明了负压灌溉的可行性,并为确定负压灌溉系统应用范围及规划设计过程中灌水器选择提供了依据。江培福 雷廷武 Vincent F Bralts 刘汉 2006农业工程学报2006,22,4:26
20Scattering of plane P waves by circular-arc layered alluvial valleys: An analytical solution显示文摘An analytical solution for scattering of plane P waves by circular-arc layered alluvial valleys was derived by Fourier-Bessel series expansion technique, and the solution was utilized to analyze the effects of alluvial sequence and their relative stiffness on the scattering of incident waves.梁建文 严林隽 Vincent W.Lee 2001地震学报2001,23,2:26
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