检索结果-南通市图书馆

On Defected Colourings of Graphs

在线全文

学校读者我要写书评

暂无评论

Acta Mathematicae Applicatae Sinica 2013年第4期29卷 777-786页

作者： Bing YAO zhong-fu zhang Jian-fang WANG College of Mathematics and Statistics Northwest Normal University Institute of Applied Mathematic Lanzhou Jiaotong University Academy of Mathematics and Systems Science Chinese Academy of Sciences

Abstract A k-edge-coloring f of a connected graph G is a （A1, A2, , A）-defected k-edge-coloring if there is a smallest integer/ with 1 _ /3 _〈 k - i such that the multiplicity of each color j E {1,2,... ,/3} appearing at a vertex is equal to Aj _〉 2, and each color of {/3 -}- 1,/3 - 2, - , k} appears at some vertices at most one time. The （A1, A2,, A/）-defected chromatic index of G, denoted as X （A1, A2,, A/; G）, is the smallest number such that every （A1,A2,-.., A/）-defected t-edge-coloring of G holds t _〉 X（A1, A2 A;; G）. We obtain A（G） X（A1, ）2, , A/; G）＋ -- （Ai - 1） _〈 /k（G） 1, and introduce two new chromatic indices of G i=1 as： the vertex pan-biuniform chromatic index X pb （G）, and the neighbour vertex pan-biuniform chromatic index Xnpb（G）, and furthermore find the structure of a tree T having X pb （T） =1.

关键词： edge coloring total coloring defected coloring

Some Results on Spanning Trees

在线全文

学校读者我要写书评

暂无评论

Acta Mathematicae Applicatae Sinica 2010年第4期26卷 607-616页

作者： Bing Yao zhong-fu zhang Jian-fang Wang College of Mathematics and Information Science Northwest Normal UniversityLanzhou 730070China Academy of Mathematics and Systems Science Chinese Academy of SciencesBeijing 100190China

Some structures of spanning trees with many or less leaves in a connected graph are *** show（1） a connected graph G has a spanning tree T with minimum leaves such that T contains a longest path,and（2） a connected graph G on n vertices contains a spanning tree T with the maximum leaves such that Δ（G） =Δ（T） and the number of leaves of T is not greater than n D（G）＋1,where D（G） is the diameter of G.

关键词： Spanning tree leaves diameter Steiner tree independent number

Equitable Total Coloring of F_n ∨ W_n

在线全文

学校读者我要写书评

暂无评论

Acta Mathematicae Applicatae Sinica 2009年第1期25卷 83-86页

作者： Kun Gong zhong-fu zhang Jian-fang Wang Institute of Applied Mathematics Lanzhou Jiaotong University Lanzhou 730070 China Institute of Applied Mathematics Academy of Mathematics and Systems Science Chinese Academy of SciencesBejing 100190 China

The minimum number of total independent partition sets of V ∪ E of graph G（V,E） is called the total chromatic number of G denoted by χt（G）. If the difference of the numbers of any two total independent partition sets of V ∪ E is no more than one＇, then the minimum number of total independent partition sets of V ∪ E is called the equitable total chromatic number of G, denoted by χet（G）. In this paper, we obtain the equitable total chromatic number of the join graph of fan and wheel with the same order.

关键词： Fan wheel join graph equitable edge coloring equitable total coloring

DNA barcoding and molecular phylogeny of Dumasia(Fabaceae:Phaseoleae)reveals a cryptic lineage

在线全文

学校读者我要写书评

暂无评论

Plant Diversity 2020年第5期42卷 376-385页

作者： Kai-Wen Jiang Rong zhang zhong-fu zhang Bo Pan Bin Tian Key Laboratory of Biodiversity Conservation in Southwest China National Forestry and Grassland AdministrationSouthwest Forestry UniversityKunming650224China Germplasm Bank of Wild Species Kunming Institute of BotanyChinese Academy of SciencesKunming650201YunnanChina University of Chinese Academy of Sciences Beijing100049China Department of Wetland Southwest Forestry UniversityKunming650224China Center for Integrative Conservation Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesMengla666303China Center of Conservation Biology Core Botanical GardensChinese Academy of SciencesMengla666303China Department of Botany and Biodiversity Research University of ViennaRennweg 14A-1030ViennaAustria

Dumasia taxonomy and classification have long been *** within this genus have few morphological differences and plants without flowers or fruits are difficult to accurately *** this study,we evaluated the ability of six DNA barcoding sequences,one nuclear(ITS)and five chloroplast regions(trnH-psbA,matK,rbcL,trnL-trnF,psbB-psbF),to efficiently identify Dumasia *** single markers or their combinations identify obvious barcoding gaps between intraspecific and interspecific genetic *** combined analyses including ITS showed good species resolution and identification *** therefore suggest that ITS alone or a combination of ITS with any cpDNA marker are most suitable for DNA barcoding of *** phylogenetic analyses clearly indicated that Dumasia yunnanensis is not monophyletic and is separated as two independent branches,which may result from cryptic *** results demonstrate that molecular data can deepen the comprehension of taxonomy of Dumasia and provide an efficient approach for identification of the species.

关键词： Cryptic species DNA barcoding Dumasia Internal transcribed spacer(ITS) Plastid genome

A Note on Adjacent Strong Edge Coloring of K(n,m)

在线全文

学校读者我要写书评

暂无评论

Acta Mathematicae Applicatae Sinica 2006年第2期22卷 273-276页

作者： Jing-wen Li zhong-fu zhang Xiang-en Chen Yi-rong Sun College of Information and Electrical Engineering Lanzhou Jiaotong University Lanzhou 730070 China Institutc of Applied Mathematics Lanzhou Jiaotong University Lanzhou 730070 China College of Mathematics and Information Science Northwest Normal University Lanzhou 730070 China

In this paper, we prove that the adjacent strong edge chromatic number of a graph K（n,m） is n ＋ 1, with n ≥ 2, m ≥ 1.

关键词： Coloring edge coloring adjacent strong edge coloring

On the Relations of Graph Parameters and Its Total Parameters

在线全文

学校读者我要写书评

暂无评论

Acta Mathematicae Applicatae Sinica 2010年第3期26卷 525-528页

作者： Jing-wen Li Zhi-wen Wang Jaeun Lee Moo Young Sohn zhong-fu zhang En-qiang Zhu Institute of Applied Mathematics Lanzhou Jiaotong University Lanzhou 730070 China School of Mathematics and Computer Science Ningxia University Yinchuan 750021 China Department of Mathematics Yeungnam University Kyongsan 712-749 Korea Department of Applied Mathematics Changwon University Changwon 641 773 Korea

In this paper we get some relations between α（G）, α＇（G）, β（G）, β＇（G） and αT（G）, βT（G）. And all bounds in these relations are best possible, where α（G）, α＇（G）,/3（G）, β（G）, αT（G） and βT（G） are the covering number, edge-covering number, independent number, edge-independent number （or matching number）, total covering number and total independent number, respectively.

关键词： Graph covering number edge covering number independent number edge independent number,total covering number total independent number

NUMERICAL SIMULATION ON VELOCITIES OF TWO INTERACTING FIBERS IN FIBER SUSPENSION

在线全文

学校读者我要写书评

暂无评论

Journal of Hydrodynamics 2003年第3期15卷 10-16页

作者： Lin Jian-zhong, Bao fu-bing, zhang Zhi-chao Department of Mechanics, State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China, Lab. of Fluid Power Transmission Dept. of Mech. Zhejiang Univ. Hangzhou 310027 China

A mathematical model was put forward to describe the mechanical interactionsof two contacting fibers, then a numerical simulation was carried out. The results of the simulationaccord with experimental results well. It turns out that the initial contacting point and theinitial orientation of the settling fiber have much effect on the translational and rotationalvelocities of the settling fiber, along with the increase in the length or the decrease in theradius of the fiber, the translational and rotational velocities of the settling fiber decrease; thesame trend remains when the viscosity of the solvent increases or the density of the fiberdecreases.

关键词： fiber suspension mechanical interaction numerical simulation

Saline Water Irrigation Scheduling Through a Crop-Water-Salinity Production function and a Soil-Water-Salinity Dynamic Model

在线全文

学校读者我要写书评

暂无评论

Pedosphere 2007年第3期17卷 303-317页

作者： WANG Yang-Ren KANG Shao-zhong LI fu-Sheng zhang Lu zhang Jian-Hua Center for Agricultural Water Research in China China Agricultural University Beijing 100083 （China） Department of Water Conservancy Engineering Tianjin Agricultural University Tianjin 300384 （China） Agricultural College Guangxi University Nanning 530005 （China） CSIRO Land and-Water GPO Box 1666 Canberra ACT 2601 （Australia） Department of Biology Hong Kong Baptist University Kowloon Tang Hong Kong （China）

Using a crop-water-salinity production function and a soil-water-salinity dynamic model, optimal irrigation scheduling was developed to maximize net return per irrigated area. Plot and field experiments were used to obtain the crop water sensitivity index, the salinity sensitivity index, and other parameters. Using data collected during 35 years to calculate the 10-day mean precipitation and evaporation, the variation in soil salinity concentrations and in the yields of winter wheat and cotton were simulated for 49 irrigation scheduling that were combined from 7 irrigation schemes over 3 irrigation dates and 7 salinity concentrations of saline irrigation water (fresh water and 6 levels of saline water). Comparison of predicted results with irrigation data obtained from a large area of the field showed that the model was valid and reliable. Based on the analysis of the investment cost of the irrigation that employed deep tube wells or shallow tube wells, a saline water irrigation schedule and a corresponding strategy for groundwater development and utilization were proposed. For wheat or cotton, if the salinity concentration was higher than 7.0 g L-1 in groundwater, irrigation was needed with only fresh water; if about 5.0 g L-1, irrigation was required twice with fresh water and once with saline water; and if not higher than 3.0 g L-1, irrigation could be solely with saline water.

关键词： crop-water-salinity production function irrigation scheduling saline water irrigation water-salinity dy- namic model

Correlation study between peripheral blood CD4+CD25+Treg levels and systemic inflammatory response in patients with sepsis

在线全文

学校读者我要写书评

暂无评论

Journal of Hainan Medical University 2017年第12期23卷 91-94页

作者： Hai-Xia Chang Li-Bo zhang zhong-fu zhang Emergency Department Children's Hospital of Hebei ProvinceShijiazhuang050031China The Ninth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine Shanghai201999China

Objective:To study the correlation between peripheral blood CD4+CD25+Treg levels and systemic inflammatory response in patients with ***: 36 children who were diagnosed with sepsis in Children's Hospital of Hebei Province between June 2014 and December 2016 were selected as sepsis group, and healthy volunteer children who received physical examination during the same period were selected as control group. Peripheral blood was collected to determine the content of CD4+CD25+Treg cells, and the serum was collected to determine the contents of the inflammatory mediators and oxidative stress ***:Peripheral blood CD4+CD25+Treg cell level in sepsis group was significantly higher than that in control group. Serum ICAM-1, TNF-α, IL-1β, CRP, PCT, LPO, MDA and AOPPs levels in sepsis group were significantly higher those in control group;serum ICAM-1, TNF-α, IL-1β, CRP, PCT, LPO, MDA and AOPPs levels in sepsis children with high Treg level were significantly higher than those in sepsis children with low Treg ***: Increased levels of CD4+CD25+Treg cells in patients with sepsis can activate systemic inflammatory response and oxidative stress response.

关键词： Sepsis Regulatory T cell Inflammatory response Oxidative stress response