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Simple Algorithms for Network Visualization:A Tutorial

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Tsinghua Science and Technology 2012年第4期17卷 383-398页

作者： michael j.McGuffin Department of Software and IT Engineering cole de technologie suprieureMontral H3C 1K3Canada

The graph drawing and information visualization communities have developed many sophisticated techniques for visualizing network data, often involving complicated algorithms that are difficult for the uninitiated to learn. This article is intended for beginners who are interested in programming their own network visualizations, or for those curious about some of the basic mechanics of graph visualization. Four easy-to-program network layout techniques are discussed, with details given for implementing each one： force-directed node-link diagrams, arc diagrams, adj.cency matrices, and circular layouts. A j.va applet demonstrating these layouts, with open source code, is available at http：//***/research/simpleNetVis/. The end of this article also briefly surveys research topics in graph visualization, pointing readers to references for further reading.

关键词： network visualization graph visualization graph drawing node-link diagram force-directed layout arcdiagram adj.cency matrix circular layout tutorial

The earliest archaeobiological evidence of the broad-ening agriculture in China recorded at Xishanping site in Gansu Province

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Science China Earth Sciences 2007年第11期50卷 1707-1714页

作者： j. DODSON Institute of Environmental Research Australian Nuclear Science and Technology Organisation Sydney NSW 2234 Australia

The crop types and agricultural characteristic are reconstructed using the archaeobiological proxies of pollen, seed and phytolith at Xishanping site in Gansu Province between 5250 and 4300 cal a BP. The agricultural activity strengthened in Xishanping from 5100 cal a BP. It appeared the earliest cultivation of prehistoric rice in the most northwest China at 5070 cal a BP. The sudden disappearance of conifers and expansion of chestnut trees is likely to be the result of selective hewing of conifers and cultivation of chestnuts at about 4600 cal a BP. There existed 8 crop types of foxtail millet, broomcorn millet, rice, wheat, barley, oats, soybean and buckwheat at Xishanping between 4650 and 4300 cal a BP, which cover the main crop types of the two origin centers of East and West Asia. Not only has the wheat and barley been approved to spread to northwestern China, but the earliest complexity agriculture in Neo-lithic China appeared in Tianshui, Gansu Province.

关键词： archaeobiological proxy,broadening agriculture,Xishanping site,Gansu Province,4650 cal a BP

NANOCOMPOSITE COATINGS WITH ENHANCED HARDNESS

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Acta Metallurgica Sinica(English Letters) 2005年第3期18卷 433-442页

作者： j. Musil Department of Physics University of West Bohemia Univerzitní 22 306 14 Pl zeň.

The article reviews the present state of the art in the magnetron sputtering of hart and superhard nanocomposite coatings. It is shown that there are (1) two gr oups of hard and superhard nanocomposites: (i) nc-MN/hard phase and (ii) nc-MN/s oft phase, (2) three possible origins of the enhanced hardness: (i) dislocation- dominated plastic deformation, (ii) cohesive forces between atoms and (iii) nano structure of materials, and (3) huge differences in the microstructure of single - and two-phase films. A main attention is devoted to the formation of nanocryst alline and/or X-ray amorphous films. Such films are created in a vicinity of tra nsitions between (i) crystalline and amorphous phases, (ii) two crystalline phas es of different chemical composition or (iii) two different preferred orientatio ns of grains of the same material from which the coating is composed. The existe nce of the last transition makes it possible to explain the enhanced hardness in single-phase films. The thermal stability and oxidation resistance of hard nano composite films is also shortly discussed.

关键词： nanocomposites single- and two-phase films enhanced hardness,

A UNIFIED CLASS OF ANALYTIC FUNCTIONS WITH FIXED ARGUMENT OF COEFFICIENTS

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Acta Mathematica Scientia 2011年第4期31卷 1357-1366页

作者： j. Dziok Institute of Mathematics University of Rzeszów ul.

In this paper we introduce new classes of analytic functions with fixed argument of coefficients defined by subordination. Coefficient estimates, distortion theorems, integral means inequalities, and the radii of conv... 详细信息

关键词： analytic functions fixed argument subordination Hadamard product

How to make the "j.mp" on understanding the importance of the intrinsic foot muscles for propulsion

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j.urnal of Sport and Health Science 2023年第5期12卷 648-650页

作者： michael j.Asmussen Department of Biology Faculty of Science&TechnologyMount Royal UniversityCalgaryAB T3E 6K6Canada

In this issue of the j.urnal of Sport and Health Science,Smith and colleagues1addressed a unique aspect of human locomotion;they evaluated the effects of the intrinsic foot musculature on the mechanical properties and energetic function of the human *** performing a controlled j.mping experiment to mimic components of human locomotion.

关键词： intrinsic muscles propulsion

Emergence of magnetic order in kagome antiferromagnets

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Frontiers of physics 2019年第2期14卷 47-51页

作者： D. j. j. Farnell School of Dentistry Cardiff UniversityCardiff CF14 /XYWales UK

Exotic quantum spin liquid (QSL) states and fractionalized quasiparticles in frustrated magnets are of much current interest in theoretical and experimental studies of quantum magnetism. The kagome-lattice Heisenberg antiferromagnet (KAFM) provides a possible realization of j.st such novel topological states of matter. The kagome lattice shown in Fig. 1 is one of eleven Archimedean lattices in two spatial dimensions, where the word kagome itself means uweave pattera" in j.panese.

关键词： magnetic order kagome antiferromagnets quantum spin liquid (QSL)

Universal Hyperthermal Model for Mass Extinctions

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j.urnal of Earth Science 2024年第2期35卷 704-707页

作者： michael j.Benton Paleobiology Research Group School of Earth SciencesUniversity of BristolLife Sciences BuildingTyndall AvenueBristolBS81TQUK

INTRODUCTION Earth scientists have long sought universal features of past extinction *** can be argued that each past extinction event was a singularity,caused by combinations of circumstances that are unique in each case,and therefore that the search for common causes is ***,a key feature of the uniformitarian approach to geology is that past processes are the same as modern-day processes and,with that in mind,earth scientists are keen to use their knowledge to contribute some understanding to the study of the present and future climate crisis.

关键词： extinction singularity Extinction

Understanding Performance for Two 802.11 Competing Flows

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j.urnal of Computer Science & Technology 2008年第3期23卷 365-376页

作者： michael j.Feeley Brendan Cully Sharath j.George Department of Computer Science University of British ColumbiaVanconverCanada

It is well known that 802.11 suffers from both inefficiency and unfairness in the face of competition and interference. This paper provides a detailed analysis of the impact of topology and traffic type on network performance when two flows compete with each other for airspace. We consider both TCP and UDP flows and a comprehensive set of node topologies. We vary these topologies to consider all combinations of the following four node-to-node interactions：（1） nodes unable to read or sense each other, （2） nodes able to sense each other but not able to read each other＇s packets and nodes able to communicate with （3） weak and with （4） strong signal. We evaluate all possible cases through simulation and show that the cases can be reduced to 9 UDP and 10 TCP 802.11g models with similar efficiency/fairness characteristics. We also validate our simulation results with extensive experiments conducted in a laboratory testbed. These more detailed models improve on previous work such as hidden-/exposed-terminal categorization and are thus better suited as a basis for adaptive techniques to improve performance in 802.11 multi-hop WLAN or Mesh Networks.

关键词： 802.11 wireless unfairness two-flow competition network topology

Non-coding regions of the Ebola virus genome contain indispensable phylogenetic and evolutionary information

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Science China(Life Sciences) 2015年第7期58卷 682-686页

作者： j.ANG XinQuan ZHANG Zhenj.e ZHUANG DongMing CARR michael j. ZHANG RuiLing LV Qiang SHI WeiFeng School of Public Health Taishan Medical College Institute of Pathogen Biology Taishan Medical College National Virus Reference Laboratory University College Dublin

We compared the numbers of nucleotide substitutions occurring in the non-coding regions and coding regions of Ebola virus genomes and found that non-coding regions contain indispensable phylogenetic and evolutionary information. The omission of genetic data from non-coding regions can lead to unreliable phylogenies and inaccurate estimates of evolutionary parameters.

关键词： EBOV Ebola non-coding region phylogenetic analysis evolutionary information