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The lower bound on independence number

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Science China Mathematics 2002年第1期45卷 64-69页

作者：李雨生 CecilC.rousseau 臧文安 Department of Mathematics Hohai University Nanjing China Department of Mathematical Sciences the University of Memphis Memphis USA Department of Mathematics the University of Hong Kong Hong Kong China

Let G be a graph with degree sequence ( dv). If the maximum degree of any subgraph induced by a neighborhood of G is at most m, then the independence number of G is at least $\sum\limits_v {f_{m + 1} \left( {d_v } \right)} $ , where fm+1( x) is a function greater than $\frac{{log\left( {x/\left( {m + 1} \right)} \right) - 1}}{x}for x > 0$ for x> 0. For a weighted graph G = ( V, E, w), we prove that its weighted independence number (the maximum sum of the weights of an independent set in G) is at least $\sum\limits_v {\frac{{w_v }}{{1 + d_v }}} $ where wv is the weight of v.

关键词： independence number discrete form weighted graph

25万年来黄土蜗牛的生态演替对地球轨道变化的响应

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科学通报 2000年第7期45卷 765-770页

作者：吴乃琴 D.D.rousseau 刘秀平中国科学院地质与地球物理研究所北京100029 Laboratoire de Playnologie-URA327 University Montpellier Ⅱ

通过对洛川剖面２５０ｋａＢＰ来蜗牛化石记录的分析，划分出１１个化石组合带，研究了最近两个冰期旋回以来的生物组合特征，探讨了不同生态环境类型的变化规律及其主要的控制因素．结果表明：陆生蜗牛的生态演替过程，与地轴倾角... 详细信息

通过对洛川剖面２５０ｋａＢＰ来蜗牛化石记录的分析，划分出１１个化石组合带，研究了最近两个冰期旋回以来的生物组合特征，探讨了不同生态环境类型的变化规律及其主要的控制因素．结果表明：陆生蜗牛的生态演替过程，与地轴倾角和岁差变化的关系是明确的，喜温湿类蜗牛繁盛期对应着地轴倾角的增大期，喜冷干类蜗牛繁盛期对应了地轴倾角的减小期．反映了东亚夏季风在控制陆地生态演变过程中具有明显的４０ｋａ变化周期，岁差的２０ｋａ周期同时起到重要的调节作用，１００ｋａ左右的周期变化在生态群落的演替过程中，并不是主要的控制因素，但它可能是陆地生态变化幅度的背景因素．

关键词：蜗牛黄土地球轨迹变化生态演替化石古气候

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耦合湿地模块的流域水文模型模拟效率评价

水科学进展 2019年第3期30卷 326-336页

作者：吴燕锋章光新齐鹏 rousseau Alain N 胡宝军宋峥于成刚中国科学院东北地理与农业生态研究所吉林长春130102 中国科学院大学北京100049 Institut National de la Recherche Scientifique-Eau Terre Environnement G1K 9A9 QuebecCanada 嫩江尼尔基水利水电有限责任公司黑龙江齐齐哈尔161005 黑龙江省大兴安岭水文局黑龙江加格达奇165000

耦合湿地模块的流域水文模型是开展流域湿地变化的水文效应及其水文功能评估的有效工具,其模拟效率直接关系到模拟精度和应用价值。选取中国湿地主要分布区之一的嫩江流域,利用PHYSITEL/HYDROTEL模型平台,构建孤立湿地和河滨湿地模块并... 详细信息

耦合湿地模块的流域水文模型是开展流域湿地变化的水文效应及其水文功能评估的有效工具,其模拟效率直接关系到模拟精度和应用价值。选取中国湿地主要分布区之一的嫩江流域,利用PHYSITEL/HYDROTEL模型平台,构建孤立湿地和河滨湿地模块并与流域水文模型耦合,并从拟合优度指数和模拟效率角度评价了耦合湿地模块的流域水文模型模拟效率。结果表明,耦合湿地模块的流域水文模型,拟合和验证期间模型的拟合度指数均有所提高,嫩江富拉尔基和大赉水文站控制流域的Nash-Sutcliffe系数和克林效率系数平均提高了3.08%和4.64%,均方根误差和相对偏差平均降低了12.72%和55.93%,且整个研究时段模拟结果的流量指数总体更接近于观测的径流数据。可见,耦合湿地模块的流域水文模型可提高水文过程模拟精度,更好地定量评估湿地水文功能,为流域水资源精准调控与湿地修复保护提供重要支撑。

关键词： PHYSITEL/HYDROTEL模型平台湿地模块流域水文模型模拟效率嫩江流域

Relativistic-intensity near-single-cycle light waveforms at kHz repetition rate

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Light(Science & Applications) 2020年第1期9卷 1572-1580页

作者： Marie Ouille Aline Vernier Frederik Bohle Maimouna Bocoum Aurelie Jullien Magali Lozano Jean-Philippe rousseau Zhao Cheng Dominykas Gustas Andreas Blumenstein Peter Simon Stefan Haessler Jerome Faure Tamas Nagy Rodrigo Lopez-Martens Laboratoire d’Optique Appliquee CNRSEcole PolytechniqueENSTA ParisInstitut Polytechnique de Paris181 chemin de la Huniere et des Joncherettes91120 PalaiseauFrance Ardop Engineering Cite de la Photonique11 Avenue de la Canterannebat.Pleione33600 PessacFrance Laser-Laboratorium Gottingen e.V. Hans-Adolf-Krebs-Weg 137077 GottingenGermany Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy Max-Born-Strasse 2A12489 BerlinGermany

The development of ultra-intense and ultra-short light sources is currently a subject of intense research driven by the discovery of novel phenomena in the realm of relativistic optics,such as the production of ultrafast energetic particle and radiation beams for *** has been a long-standing challenge to unite two hitherto distinct classes of light sources:those achieving relativistic intensity and those with pulse durations approaching a single light *** the former class traditionally involves large-scale amplification chains,the latter class places high demand on the spatiotemporal control of the electromagnetic laser ***,we present a light source producing waveformcontrolled 1.5-cycle pulses with a 719 nm central wavelength that can be focused to relativistic intensity at a 1 kHz repetition rate based on nonlinear post-compression in a long hollow-core *** unique capabilities of this source allow us to observe the first experimental indications of light waveform effects in laser wakefield acceleration of relativistic energy electrons.

关键词： repetition intensity light

Ribavirin:Past,present and future

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World Journal of Hepatology 2016年第2期8卷 123-130页

作者： Véronique Loustaud-Ratti Marilyne Debette-Gratien Jérémie Jacques Sophie Alain Pierre Marquet DenisSautereau Annick rousseau Paul Carrier Fédération Hépatologie CHU Dupuytren87042 LimogesFrance Service d’Hépatogastroentérologie CHU Limoges87042 LimogesFrance U850 INSERM Universitéde LimogesCHU Limoges87042 LimogesFrance Service de Bactériologie Virologie CHU Limoges87042 LimogesFrance U1092 INSERM Universitéde LimogesCHU Limoges87042 LimogesFrance Service de Pharmacologie CHU Limoges87042 LimogesFrance

Before the advent of direct acting antiviral agents(DAAs) ribavirin, associated to pegylated-interferon played a crucial role in the treatment of chronic hepatitis C, preventing relapses and breakthroughs. In the present era of new potent DAAs, a place is still devoted to the drug. Ribavirin associated with sofosbuvir alone is efficient in the treatment of most cases of G2 infected patients. All options currently available for the last difficult-to-treat cirrhotic G3 patients contain ribavirin. Reducing treatment duration to 12 wk in G1 or G4 cirrhotic compensated patients is feasible thanks to ribavirin. Retreating patients with acquired anti NS5 A resistance-associated variants using ribavirin-based strategies could be useful. The addition of ribavirin with DAAs combinations however, leads to more frequent but mild adverse events especially in cirrhotic patients. Preliminary data with interferon-free second generation DAAs combinations without ribavirin suggest that future of the drug is jeopardized even in difficult-totreat patients: The optimization of ribavirin dosage according to an early monitoring of blood levels has been suggested to be relevant in double therapy with peginterferon or sofosbuvir but not with very potent combinations of more than two DAAs.

关键词： Ribavirin Hepatitis C Peginterferon Directacting antiviral agents

末次冰期晚期黄土蜗牛化石记录的气候不稳定性

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科学通报 1998年第15期43卷 1654-1658页

作者：吴乃琴 D.D.rousseau 刘东生中国科学院地质研究所北京100029 LaboratoiredePalynologie

通过对黄土高原长武、洛川和渭南 3个典型黄土剖面蜗牛化石记录的研究 ,探讨末次冰期晚期这一地区气候变化的特点 .研究结果表明末次冰期晚期时黄土高原的气候是极不稳定的 ,其变化趋势与东北太平洋Tanner孔有孔虫含量及GRIP2冰芯氧同... 详细信息

通过对黄土高原长武、洛川和渭南 3个典型黄土剖面蜗牛化石记录的研究 ,探讨末次冰期晚期这一地区气候变化的特点 .研究结果表明末次冰期晚期时黄土高原的气候是极不稳定的 ,其变化趋势与东北太平洋Tanner孔有孔虫含量及GRIP2冰芯氧同位素记录有很好的可比性。

关键词：末次冰期黄土蜗牛化石不稳定性气候变化

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独立数的一个下界

中国科学（A辑） 2001年第10期31卷 865-870页

作者：李雨生 C.C.rousseau 臧文安河海大学数学物理系南京210098 Department of Mathe matical Sciences The University of Memphis 香港大学数学系

设G是一个图 ,其度序列为 (dv) .若由G的任意邻域导出子图的最大度至多为m ,则G的独立数至少是 ∑vfm +1(dv) ,这里当x >0 ,函数fm +1(x)大于log(x/(m + 1 ) ) - 1x .对于加权图G =(V ,E ,w) ,证明了它的加权独立数至少是∑vwv1 +dv,这... 详细信息

设G是一个图 ,其度序列为 (dv) .若由G的任意邻域导出子图的最大度至多为m ,则G的独立数至少是 ∑vfm +1(dv) ,这里当x >0 ,函数fm +1(x)大于log(x/(m + 1 ) ) - 1x .对于加权图G =(V ,E ,w) ,证明了它的加权独立数至少是∑vwv1 +dv,这里wv 是顶点v的权重 .

关键词：独立数离散形式加权图图论导出子图局部稀疏图 Turan定理

黄土高原35万年来冬、夏季风变化周期的差异——陆生蜗牛化石的证据

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第四纪研究 2001年第6期21卷 540-550页

作者：吴乃琴裴云鹏吕厚远 D.D.rousseau 中国科学院地质与地球物理研究所北京100029 Laboratoire de Palynologie URA327 University MontpellierIIFrance

通过对黄土高原洛川、长武剖面最近 3 5万年来陆生蜗牛化石的高分辨率研究 ,揭示出喜温湿和喜冷干蜗牛种类分别存在不同的变化周期 :喜温湿类蜗牛化石所揭示的东亚夏季风的变化存在明显的 41 0 0 0a和 2 3 0 0 0a周期 ,与地轴倾角和岁... 详细信息

通过对黄土高原洛川、长武剖面最近 3 5万年来陆生蜗牛化石的高分辨率研究 ,揭示出喜温湿和喜冷干蜗牛种类分别存在不同的变化周期 :喜温湿类蜗牛化石所揭示的东亚夏季风的变化存在明显的 41 0 0 0a和 2 3 0 0 0a周期 ,与地轴倾角和岁差 (低纬度太阳辐射 )的变化周期有关 ;而反映冬季风变化的喜冷干蜗牛种类则表现出不同的变化特点 ,其主要为 0 .1Ma和 41 0 0 0a的周期。冬、夏季风的变化与地轴倾角 41 0 0 0a周期都存在很好的相关性 ,但与地球轨道的岁差 (1 90 0 0～ 2 3 0 0 0a)及偏心率 (0 .1Ma)的周期没有一致的相关关系。在轨道尺度上冬、夏季风之间不存在此消彼长的简单变化模式。

关键词：蜗牛化石轨道驱动黄土高原冬季夏季风黄土-古土壤序列古气候变化磁化率

Stimbiotic supplementation modulated intestinal inflammatory response and improved broilers performance in an experimentally-induced necrotic enteritis infection model

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Journal of Animal Science and Biotechnology 2023年第1期14卷 322-338页

作者： Ji Hwan Lee Byongkon Lee Xavière rousseau Gilson A.Gomes Han Jin Oh Yong Ju Kim Se Yeon Chang Jae Woo An Young Bin Go Dong Cheol Song Hyun Ah Cho Jin Ho Cho Department of Animal Science Chungbuk National UniversityCheongju 28644South Korea. Cherrybro Co. Ltd.Jincheon‑Gun 27820South Korea. AB Vista MarlboroughWiltshireUK.

Background:Two experiments were conducted to establish an optimal NE challenge model and evaluate the efficacy of stimbiotic(STB)supplementation in necrotic enteritis(NE)challenged *** Exp.1,a total of 120 Arbor Acres(AA)broilers(45.0±0.21 g)were randomly assigned to 6 treatments in a 3×2 factorial *** treatments included non-challenge(0),×10 the recommended dose(×10)or×20 the recommended dose(×20)by the *** perfringens(CP)treatments were non-challenge(No)or 3 mL of 2.2×10^(7)CFU CP challenge(Yes).In Exp.2,a total of 72 AA broilers(40.17±0.27 g)were randomly assigned to 6 treatments in a 3×2 factorial *** treatments included non-additive(CON),100 mg/kg STB(STB)and 100 mg/kg STB on top of a typical commercial blend including an essential oil,probiotics,and enzyme(CB).Challenge treatments included non-NE challenge(No)and NE challenge(Yes)as established in ***:In Exp.1,CP and vaccine challenge decreased(P<0.05)body weight(BW),body weight gain(BWG)and feed intake(FI),and increased(P<0.05)the number of broilers with diarrhea and intestinal *** oral administration of×20 recommended dose of vaccines coupled with 3 mL of 2.2×10^(7)CFU CP resulted in(P<0.01)a significantly increased incidence of wet litter and intestinal ***,this treatment was chosen as the challenge model for the successful inducement of NE in *** Exp.2,the NE challenge negatively affected(P<0.01)growth performance,ileal morphology,immunoglobulin contents in blood,caecal microbiota in the caecum,footpad dermatitis,intestinal lesion scores,tumour necrosis factor(TNF-α)and endotoxin in the serum compared with the non-NE challenged *** supplementation of STB and CB in diets enhanced(P<0.05)growth performance,intestinal microbiota,and blood profiles by stimulating ileal morphology(VH and VH:CD)and propionate production in the cecum,and there were no differences in measured variables between STB and CB supplemented

关键词： Broiler chicken Clostridium perfringens Necrotic enteritis Xylanse Xylooligosaccharide