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Super Connectivity of line Graphs and Digraphs

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Acta Mathematicae Applicatae Sinica 2006年第1期22卷 43-48页

作者： Min lü Jun-Ming xu Department of Computer Science and Technology University of Science and Technology of China Hefei 230026China Department of Mathematics Univcrsity of Science aad Technology of China Hefei 230026 China

The h-super connectivity κh and the h-super edge-connectivity λh are more refined network reliability indices than the conneetivity and the edge-connectivity. This paper shows that for a connected balanced digraph D and its line digraph l, if D is optimally super edge-connected, then κ1（l） = 2λ1 （D）, and that for a connected graph G and its line graph l, if one of κ1 （l） and λ（G） exists, then κ1（l） = λ2（G）. This paper determines that κ1（B（d, n） is equal to 4d- 8 for n = 2 and d ≥ 4, and to 4d-4 for n ≥ 3 and d ≥ 3, and that κ1（K（d, n）） is equal to 4d- 4 for d 〉 2 and n ≥ 2 except K（2, 2）. It then follows that B（d,n） and K（d, n） are both super connected for any d ≥ 2 and n ≥ 1.

关键词： line graphs super connectivity super edge-connectivity de Bruijn digraphs Kautz digraphs

基于NOD样受体3炎性小体通路对利拉鲁肽在氧化低密度脂蛋白诱导内皮细胞损伤的作用机制研究

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中国全科医学 2025年第5期28卷 601-606页

作者：陈玲徐锐程新春张占英徐红新疆维吾尔自治区人民医院老年医学中心新疆维吾尔自治区乌鲁木齐830001

背景动脉粥样硬化是世界范围内引起心脑血管疾病最主要的原因,炎症是目前研究热点,其中NOD样受体3(NlRP3)是研究最为深入的炎症小体。胰高糖素样肽1(GlP-1)受体激动剂有抗动脉粥样硬化作用,具体机制尚不明确。目的研究利拉鲁肽通过拮抗... 详细信息

背景动脉粥样硬化是世界范围内引起心脑血管疾病最主要的原因,炎症是目前研究热点,其中NOD样受体3(NlRP3)是研究最为深入的炎症小体。胰高糖素样肽1(GlP-1)受体激动剂有抗动脉粥样硬化作用,具体机制尚不明确。目的研究利拉鲁肽通过拮抗氧化低密度脂蛋白(ox-lDl)诱导的内皮细胞损伤的作用机制。方法2022-03-25—05-19培养人脐静脉内皮细胞(HUVEC),取HUVEC加空白血清作为对照组,100μg/ml的ox-lDl干预HUVEC 48 h作为模型组,100μg/ml的ox-lDl干预HUVEC 24 h后分别加入100、200、400 nmol/l利拉鲁肽处理24 h作为利拉鲁肽低浓度组、利拉鲁肽中浓度组、利拉鲁肽高浓度组。CCK-8法计算细胞增殖率。通过扫描电镜观察焦亡细胞形态。检测乳酸脱氢酶(lDH)活力。酶联免疫吸附试验(ElISA)检测白介素(Il)-1β、Il-18表达水平。蛋白质免疫印迹试验(Western blot)检测NlRP3、接头蛋白凋亡相关斑点样蛋白(ASC)、天冬氨酸蛋白水解酶1(Caspase-1)、焦亡执行蛋白(GSDMD)、N端结构域的焦亡执行蛋白(N-GSDMD)表达水平。结果模型组、利拉鲁肽低浓度组和利拉鲁肽中浓度组细胞增殖率低于对照组,利拉鲁肽低浓度组、利拉鲁肽中浓度组、利拉鲁肽高浓度组细胞增殖率高于模型组(PlDH活力高于对照组,利拉鲁肽低浓度组、利拉鲁肽中浓度组、利拉鲁肽高浓度组低于模型组(Pl-1β表达水平高于对照组,利拉鲁肽中浓度组、利拉鲁肽高浓度组Il-1β表达水平低于模型组(Pl-18表达水平高于对照组,利拉鲁肽低浓度组、利拉鲁肽中浓度组、利拉鲁肽高浓度组Il-18表达水平低于模型组(PlRP3、ASC、Caspase-1、GSDMD、N-GSDMD表达水平高于对照组,利拉鲁肽低浓度组ASC、Caspase-1表达水平高于对照组,利拉鲁肽中浓度组NlRP3、ASC表达水平低于模型组,利拉鲁肽高浓度组NlRP3、ASC、Caspase-1表达水平低于模型组(PlDl诱导的内皮细胞NlRP3炎性小体活化,并且能够抑制内皮细胞的焦亡,具有抗动脉粥样硬化作用。

关键词：动脉粥样硬化利拉鲁肽内皮细胞氧化低密度脂蛋白 NOD样受体3

Irrigation-induced loess flow failure in Heifangtai Platform,North-West China

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Irrigation-induced loess flow failure in Heifangtai Platform...

Investigating landslide-related cracks along the edge of two loess platforms in northwest China

中国科学院地质与地球物理研究所2012年度（第12届）学术年会

作者： l.xu F.C.Dai Q.M.Gong l.G.Tham H.Min Institute of Geology and Geophysics Chinese Academy of Sciences Beijing University of Technology Department of Civil Engineering The University of Hong Kong Institute of Rock and Soil Mechanics Chinese Academy of Sciences

Because the construction of dams and hydroelectric power stations of liujiaxia and Yanguoxia across the Yellow River in West Gansu Province,North-West China,inhabitants in the reservoir areas were resettled in Heifangtai loess *** thus started in 1968. Perched water table was significantly raised and resulted in many loess flow failures in the past 30 *** type of landslide was often featured by long runout distance,high speed and *** tests along ICU and CSD stress paths were *** is shown that the loess has a strong strain-softening behavior and instability can occur in drained condition before undrained *** failure mechanism of loess flow can be interpreted as the following process:with increasing perched water table, collapse in loess was first triggered in drained condition and led to undrained loading to adjacent soil in the lower saturated part of me loess *** gravity loading applied by upper dry loess,undrained flow failure mobilized, eventually.

关键词： loess flow loess platform Agricultural irrigation laboratory test

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Investigating landslide-related cracks along the edge of two...

Reactivity of Pyrogenic Carbonaceous Matter (PCM) in mediating environmental reactions: Current knowledge and future trends

中国科学院地质与地球物理研究所2012年度（第12届）学术年会

作者： l.xu F.C.Dai l.G.Tham Y.F.Zhou C.X.Wu Division of Tibetan Plateau Research Institute of Geology and GeophysicsChinese Academy of Sciences Institute of Geology and Geophysics Chinese Academy of Sciences Department of Civil Engineering The University of Hong Kong

Cracks are widely developed along the edge of loess platforms in northwest *** surveys reveal that these cracks can be grouped into shallow and deeply penetrating *** former occur at a small distance from the platform edge,normally penetrate into the top unsaturated loess with the penetration depth being controlled by the joints in *** latter penetrate deeper into the saturated loess farther away from the platform *** cracks control the inflow and drainage of irrigation *** shallow penetrating crack can fail as a slide or fall with a volume of up to hundreds of cubic *** deeply penetrating crack can fail as a flow-like landslide with a volume of thousands of cubic meters or more.A full-scale field test simulating irrigation on the platform surface was *** two types of crack can be interconnected so that the water applied in the test finally flowed into the deep crack and was discharged from the *** of soil stress states and the results of field test show that the deeply-penetrating cracks could have both positive as well as negative effects on slope *** the one hand,water can flow more freely in the cracks, and the loess could be saturated and trigger a *** the other hand,the water can drain more easily along the crack and slope stability could be enhanced as the groundwater level is ***? 2012 |ohn Wiley & Sons,ltd.

关键词： cracks landslide loess plateau slope stability

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Frontiers of Environmental Science & Engineering 2020年第5期14卷 115-125页

作者： Wenqing xu Mark lSegall Zhao li Department of Civil and Environmental Engineering Villanova UniversityVillanovaPA 19085USA

Pyrogenic Carbonaceous Matter(PCM;e.g.,black carbon,biochar,and activated carbon)are solid residues from incomplete combustion of fussil fuel or *** are traditionally viewed as inert adsorbents for sequestering contaminants from the aqueous phase or providing surfaces for microbes to *** this account,we reviewed the recently discovered reactivity of PCM in promoting both chemical and microbial synergies that are important in pollutant transformation,biogeochemical processes of redox-active elements,and climate change mitigation with respect to the interaction between biochar and nitrous oxide(N2O).Moreover,we focused on our group's work in the PCM-enhanced abiotic transformation of nitrogenous and halogenated pollutants and conducted in-depth analysis of the reaction *** understand what properties of PCM confer its reactivity,our group pioneered the use of PCM-like polymers,namely conjugated microporous polymers(CMPs),to mimic the performance of *** approach allows for the controlled incorporation of specific surface properties(e.g.,quinones)into the polymer network during the polymer *** a result,the relationship between specific characteristics of PCM and its reactivity in facilitating the decay of a model pollutant was systematically studied in our group's *** findings summarized in this account help us to better understand an overlooked environmental process where PCM synergistically interacts with various environmental reagents such as hydrogen sulfide and ***,the knowledge gained in these studies could inform the design of a new generation of reactive carbonaceous materials with tailored properties that are highly efficient in contaminant removal.

关键词： Pyrogenic carbonaceous matter Conjugated microporous polymer Remediation Biochar Hydrolysis Pollutant degradation

Tomato leaf Photosynthetic Responses to Humidity andTemperature Under Salinity and Water Deficit

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Pedosphere 1999年第2期9卷 105-112页

作者： H.l.xu l．GAUTHIER 等 InternationalNatureFarmingResearchCenter HataNagano390－1401Japan HorticultrueResearchCenter LavalUn

Greenhouse tomato plants (lycopersicon esculentum Mill cv. Capello) were grown on peat-based substrate and treated with high (4.5 mS cm-1) and low (2.3 mS cm-1) nutrient solution electric conductivity(EC) under high and low substrate water contents. FOur weeks after the beginning of the treatments, photosynthesis (Th) was measured under different humidity and temperatures to examine the interactive effectswith rhizosphere salinity and water deficit. A rectangular hyperbolic model fitted the light-photosynthesiscurve. Photosynthetic capacity (PC) was decreased but quantum yield (YQ) was increased by rhizospheresalinity caused by high EC. PN was decreased by low humidity only in high EC- and/or water-stressed *** high photosynthetic photon flux (PPF), low humidity induced PC decline in water-stressed plants andPN oscillation in high-EC-treated plants. PN increased steadily as the leaf temperature changed from 18 Cto 23 and then decreased steadily from 23 to 38 . At 34 , PN decreased significantly in waterstressed plants. Dark respiration (RD) increased in an exponential manner as the leaf temperature changedfrom 18 to 38 to an extent about ten times higher under 38 than under 18 . Our data suggestedthat PN decrease under high temperature was attributed, st least in part, to the increased RD. RD in highEC- and/or water-stressed plants was higher than that in the plants of control under lower temperature butlower than that in the plants of control under high temperature. The analysis of stomatal and mesophyllconductance showed that low humidity effect was mainly through stomatal response while temperature effectwas mainly through biochemical functions. The result showed that environmental stresses affected PN in anadditive or synergistic manner.

关键词： humidity photosynthesis rhizosphere salinity temperature water stress

Synthesis of 2-methoxy-6-oxo-1, 4, 2-diazaphosphorinane-2-oxide, A New Potential Antitumor Phosphorus Heterocycle Compound

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Chinese Chemical letters 2000年第8期11卷 665-666页

作者： xu, l Zheng, GR Xia, M Cai, JC Chinese Acad Sci Shanghai Inst Mat Med Shanghai 200031 Peoples R China

2-methoxy-6-oxo-1, 4, 2-diazaphosphorinane-2-oxide 8, phosphorus counterpart of 2, 6-dioxopiperazine, was synthesized as antitumor agent. The new phosphorus heterocycle compound 8 is the key intermediate in the synthe... 详细信息

关键词： antitumor activity phosphorus heterocycle compound 2,6-dioxopiperazine

Synthesis and applications of mesoporous Cu-Zn-Al_2O_3 catalyst for dehydrogenation of 2-butanol

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Journal of Natural Gas Chemistry 2009年第2期18卷 179-182页

作者： Deren Fang Wanzhong Ren Zhongmin liu Xiufeng xu lei xu Hongying lǔ Weiping liao Huimin Zhang Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 Liaoning China Institute of Applied Catalysis of Yantai University Yantai 264005 Shandong China

A series of mesoporous Cu-Zn-Al2O3 materials have been synthesized at ambient temperature and their structure was characterized by XRD, N2 physical adsorption and TPR techniques. Their catalytic applications for the dehydrogenation of 2-butanol to methyl ethyl ketone （MEK） were evaluated in a fixed-bed flow reactor at atmospheric pressure. It is demonstrated from the XRD patterns that both the as-synthesized samples and calcined samples have the typical XRD patterns of meso-structured materials and the results of N20 chemical adsorption showed that Cu was embedded in the framework of the mesoporous materials and homogeneously dispersed in the mesoporous Cu-Zn-Al2O3 materials. The catalytic activity of 2-butanol dehydrogenation was varied in the order of CZA（10）〈 CZA（CP）〈 CZA（20）〈 CZA（30）; while the selectivity of MEK was increased in the order of CZA（CP）〈 CZA（10）〈 CZA（20）〈CZA（30）.

关键词： Cu-Zn-Al2O3 mesoporous materials dehydrogenation of 2-butanol catalyst

Vibration and power flow analysis of periodically reinforced plates

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Science China(Technological Sciences) 2011年第5期54卷 1141-1153页

作者： H. A. xu W. l. lI Department of Mechanical Engineering Wayne State University 5050 Anthony Wayne Drive Detroit MI48202 U.S.A.

In this paper an analytical method is proposed to investigate the vibration and power flows of periodically reinforced plate with general boundary conditions. Both the plate and stiffening beams are modeled as 3D structural components, and the couplings at the interfaces are specified in terms of 3D elastic joints. The displacement function for each stiffening beam is expressed as a modified Fourier cosine series, and the transverse and in-plane displacements for the plate are similarly expressed as the 2D versions of the modified Fourier cosine series expansions. The unknown Fourier coefficients are calculated using the Rayleigh-Ritz technique. The key advantages of the proposed method include: 1) it is capable of dealing with arbitrary boundary and coupling conditions, 2) it allows modeling any number of reinforcing beams with arbitrary lengths, and 3) the structural intensity, power flows, and kinetic energy distributions are readily calculated analytically from the displacement functions through appropriate mathematical (differential) operations, to name a few. The power flow characteristics of periodically reinforced plates are studied against various influencing factors, such as, plate and beam boundary conditions, coupling conditions, excitation locations, and dislocations resulting from minor misplacement of a reinforcing beam.

关键词： vibrations reinforced plates periodic structures analytical methods