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Статті в журналах з теми "CORE VERTEX"
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Fang, Qizhi, Liang Kong, and Jia Zhao. "Core Stability of Vertex Cover Games." Internet Mathematics 5, no. 4 (January 2008): 383–94. http://dx.doi.org/10.1080/15427951.2008.10129174.
Повний текст джерела
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Wu, Tongsuo, Meng Ye, Dancheng Lu, and Houyi Yu. "On Graphs Related to Comaximal Ideals of a Commutative Ring." ISRN Combinatorics 2013 (February 19, 2013): 1–7. http://dx.doi.org/10.1155/2013/354696.
Повний текст джерелаАнотація:
We study the co maximal graph Ω(R), the induced subgraph Γ(R) of Ω(R) whose vertex set is R∖(U(R)∪J(R)), and a retract Γr(R) of Γ(R), where R is a commutative ring. For a graph Γ(R) which contains a cycle, we show that the core of Γ(R) is a union of triangles and rectangles, while a vertex in Γ(R) is either an end vertex or a vertex in the core. For a nonlocal ring R, we prove that both the chromatic number and clique number of Γ(R) are identical with the number of maximal ideals of R. A graph Γr(R) is also introduced on the vertex set {Rx∣x∈R∖(U(R)∪J(R))}, and graph properties of Γr(R) are studied.
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Green, D. G., and G. F. Gribakin. "Vertex enhancement of positron annihilation with core electrons." Journal of Physics: Conference Series 388, no. 7 (November 5, 2012): 072018. http://dx.doi.org/10.1088/1742-6596/388/7/072018.
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P., Arun Kumar, and E. Rathakrishnan. "Triangular tabs for supersonic jet mixing enhancement." Aeronautical Journal 118, no. 1209 (November 2014): 1245–78. http://dx.doi.org/10.1017/s0001924000009969.
Повний текст джерелаАнотація:
AbstractThe mixing promoting capability of right-angled triangular tab with sharp and truncated vertex has been investigated by placing two identical tabs at the exit of a Mach 2 axi-symmetric nozzle. The mixing promoting efficiency of these tabs have been quantified in the presence of adverse and marginally favourable pressure gradients at the nozzle exit. It was found that, at all levels of expansion of the present study though the core length reduction caused by both the tabs are appreciable, but the mixing caused by the truncated tab is superior. The mixing promoting efficiency of the truncated tab is found to increase with increase of nozzle pressure ratio (that is, decrease of adverse pressure gradient). For all the nozzle pressure ratios of the present study, the core length reduction caused by the truncated vertex tab is more than that of sharp vertex tab. As high as 84% reduction in core length is achieved with truncated vertex right-angled triangular tabs at moderately overexpanded level, corresponding to expansion levelpe/pa= 0·90. The corresponding core length reduction for right-angled triangular tabs with sharp vertex and rectangular tabs are 65% and 31%, respectively. The present results clearly show that the mixing promoting capability of the triangular tab is best than that of rectangular tabs at identical blockage and flow conditions.
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Feng, Xiangnan, Wei Wei, Xing Li, and Zhiming Zheng. "Core influence mechanism on vertex-cover problem through leaf-removal-core breaking." Journal of Statistical Mechanics: Theory and Experiment 2019, no. 7 (July 1, 2019): 073401. http://dx.doi.org/10.1088/1742-5468/ab25e1.
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CUCURINGU, MIHAI, PUCK ROMBACH, SANG HOON LEE, and MASON A. PORTER. "Detection of core–periphery structure in networks using spectral methods and geodesic paths." European Journal of Applied Mathematics 27, no. 6 (August 3, 2016): 846–87. http://dx.doi.org/10.1017/s095679251600022x.
Повний текст джерелаАнотація:
We introduce several novel and computationally efficient methods for detecting “core–periphery structure” in networks. Core–periphery structure is a type of mesoscale structure that consists of densely connected core vertices and sparsely connected peripheral vertices. Core vertices tend to be well-connected both among themselves and to peripheral vertices, which tend not to be well-connected to other vertices. Our first method, which is based on transportation in networks, aggregates information from many geodesic paths in a network and yields a score for each vertex that reflects the likelihood that that vertex is a core vertex. Our second method is based on a low-rank approximation of a network's adjacency matrix, which we express as a perturbation of a tensor-product matrix. Our third approach uses the bottom eigenvector of the random-walk Laplacian to infer a coreness score and a classification into core and peripheral vertices. We also design an objective function to (1) help classify vertices into core or peripheral vertices and (2) provide a goodness-of-fit criterion for classifications into core versus peripheral vertices. To examine the performance of our methods, we apply our algorithms to both synthetically generated networks and a variety of networks constructed from real-world data sets.
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Zhao, Jianwen, and Yufei Tao. "Minimum vertex augmentation." Proceedings of the VLDB Endowment 14, no. 9 (May 2021): 1454–66. http://dx.doi.org/10.14778/3461535.3461536.
Повний текст джерелаАнотація:
This paper introduces a class of graph problems named minimum vertex augmentation (MVA). Given an input graph G where each vertex carries a binary color 0 or 1, we want to flip the colors of the fewest 0-vertices such that the subgraph induced by all the (original and new) 1-vertices satisfies a user-defined predicate π. In other words, the goal is to minimally augment the subset of 1-vertices to uphold the property π. Different formulations of π instantiate the framework into concrete problems at the core of numerous applications. We first describe a suite of techniques for solving MVA problems with strong performance guarantees, and then present a generic algorithmic paradigm that a user can instantiate to deal with ad-hoc MVA problems. The effectiveness and efficiency of our solutions are verified with an extensive experimental evaluation.
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Bachrach, Y., E. Porat, and J. S. Rosenschein. "Sharing Rewards in Cooperative Connectivity Games." Journal of Artificial Intelligence Research 47 (June 14, 2013): 281–311. http://dx.doi.org/10.1613/jair.3841.
Повний текст джерелаАнотація:
We consider how selfish agents are likely to share revenues derived from maintaining connectivity between important network servers. We model a network where a failure of one node may disrupt communication between other nodes as a cooperative game called the vertex Connectivity Game (CG). In this game, each agent owns a vertex, and controls all the edges going to and from that vertex. A coalition of agents wins if it fully connects a certain subset of vertices in the graph, called the primary vertices. Power indices measure an agent's ability to affect the outcome of the game. We show that in our domain, such indices can be used to both determine the fair share of the revenues an agent is entitled to, and identify significant possible points of failure affecting the reliability of communication in the network. We show that in general graphs, calculating the Shapley and Banzhaf power indices is #P-complete, but suggest a polynomial algorithm for calculating them in trees. We also investigate finding stable payoff divisions of the revenues in CGs, captured by the game theoretic solution of the core, and its relaxations, the epsilon-core and least core. We show a polynomial algorithm for computing the core of a CG, but show that testing whether an imputation is in the epsilon-core is coNP-complete. Finally, we show that for trees, it is possible to test for epsilon-core imputations in polynomial time.
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Dong, Zheng, Xin Huang, Guorui Yuan, Hengshu Zhu, and Hui Xiong. "Butterfly-core community search over labeled graphs." Proceedings of the VLDB Endowment 14, no. 11 (July 2021): 2006–18. http://dx.doi.org/10.14778/3476249.3476258.
Повний текст джерелаАнотація:
Community search aims at finding densely connected subgraphs for query vertices in a graph. While this task has been studied widely in the literature, most of the existing works only focus on finding homogeneous communities rather than heterogeneous communities with different labels. In this paper, we motivate a new problem of cross-group community search, namely Butterfly-Core Community (BCC), over a labeled graph, where each vertex has a label indicating its properties and an edge between two vertices indicates their cross relationship. Specifically, for two query vertices with different labels, we aim to find a densely connected cross community that contains two query vertices and consists of butterfly networks, where each wing of the butterflies is induced by a k-core search based on one query vertex and two wings are connected by these butterflies. We first develop a heuristic algorithm achieving 2-approximation to the optimal solution. Furthermore, we design fast techniques of query distance computations, leader pair identifications, and index-based BCC local explorations. Extensive experiments on seven real datasets and four useful case studies validate the effectiveness and efficiency of our BCC and its multi-labeled extension models.
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McCrabb, Andrew, and Valeria Bertacco. "Optimizing Vertex Pressure Dynamic Graph Partitioning in Many-Core Systems." IEEE Transactions on Computers 70, no. 6 (June 1, 2021): 936–49. http://dx.doi.org/10.1109/tc.2021.3059386.
Повний текст джерелаДисертації з теми "CORE VERTEX"
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Peterson, Nicholas Richard. "On Random k-Out Graphs with Preferential Attachment." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1370527839.
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HANOT, RAHUL. "COMMUNITY DTECTION USING FIRE PROPAGATION AND BOUNDARY VERTICES ALGORITHMS." Thesis, DELHI TECHNOLOGICAL UNIVERSITY, 2020. http://dspace.dtu.ac.in:8080/jspui/handle/repository/18779.
Повний текст джерелаАнотація:
Community detection in complex networks deal with grouping related nodes together and
plays a vital role to understand the functioning of the system in real-life situations.
Community detection is classified as an NP-hard problem. Various algorithms are currently
available for it but the problem with these existing algorithms is either they have high in
time complexity or they have not able to partition the network perfectly. In this paper, we
propose a novel community detection algorithm that works in two phases. In the first phase,
we apply fire propagation technique in which choosing an arbitrary vertex as the core vertex
and connecting an adjacent vertex to it and shapes a community this is similar to how fire
spreads in real-life situations. In the second phase,we use the result of the first phase of an
overlapped community and detect all boundary vertices which are belongings to more than
one communities and assign them to the single community based on the weight that each
core vertex assign to that particular boundary vertex using Dijkstra distance and the count of
the adjacent vertex that belong that community. The proposed algorithm performs well as
compared to label propagation and walk-trap algorithm in terms of modularity score using
various synthetic and real-world datasets.
3
Junla, Nakorn. "Classification of certain genera of codes, lattices and vertex operator algebras." Diss., Kansas State University, 2014. http://hdl.handle.net/2097/18181.
Повний текст джерелаАнотація:
Doctor of PhilosophyDepartment of Mathematics
Gerald H. Höhn
We classify the genera of doubly even binary codes, the genera of even lattices, and the genera of rational vertex operator algebras (VOAs) arising from the modular tensor categories (MTCs) of rank up to 4 and central charges up to 16. For the genera of even lattices, there are two types of the genera: code type genera and non code type genera. The number of the code type genera is finite. The genera of the lattices of rank larger than or equal to 17 are non code type. We apply the idea of a vector valued modular form and the representation of the modular group SL[subscript]2(Z) in [Bantay2007] to classify the genera of the VOAs arising from the MTCs of ranks up to 4 and central charges up to 16.
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Beteille, Vicente Araujo. "Interações do cobre iônico com microalgas verdes." Universidade do Estado do Rio de Janeiro, 2014. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=6657.
Повний текст джерелаАнотація:
Coordenação de Aperfeiçoamento de Pessoal de Nível SuperiorNo presente trabalho foram utilizados micro-organismos fotoautotróficos para a bioacumulação de cobre em regime de batelada. Para tal, utilizou-se micro-organismos dos gêneros Ankistrodesmus, Golenkinia, Monoraphidium e Scenedesmus, em função da sua disponibilidade, facilidade de cultivo e diferenças morfológicas. Ensaios preliminares foram realizados utilizando diferentes concentrações de biossorvente, com o intuito de verificar a influência deste fator na eficiência do processo de captação. Os testes realizados em batelada incluíram também o estudo cinético e do equilíbrio, nos quais foi possível verificar que para todos os gêneros testados, o processo de captação do metal em soluções diluídas atingiu o equilíbrio quase instantaneamente. Em soluções de Cu2+ mais concentradas, observou-se diferenças entre os gêneros estudados, no tempo necessário para estabelecimento do equilíbrio. Além disso, observou-se uma alta eficiência no processo de captação de íons Cu2+ em solução por parte dos micro-organismos, com elevada captação de metal por grama de biomassa. As diferenças morfológicas entre os gêneros pareceram não influenciar significativamente a cinética e o equilíbrio do processo. Os ensaios em batelada foram realizados também empregando-se células de Golenkinia imobilizadas em alginato de cálcio, além de testes com o próprio alginato isento de micro-organismos como experimento-controle afim de verificar a influencia da imobilização nos parâmetros cinéticos e na capacidade de captação. A partir dos resultados obtidos nos ensaios em batelada com todos os biossorventes, testou-se em cada caso a aplicação de modelos cinéticos (pseudo 1 e 2 ordem) e modelos de equilíbrio (isoterma de Langmuir e Freundlich). Verificou-se que para o 4 gêneros que empregando-se células livres o modelo cujo os resultados se adequaram melhor foi o de Langmuir, enquanto que para células imobilizadas ambos modelos se mostraram adequados
In the present work photoautothrophic microorganisms were used for the bioaccumulation of copper in batch system. To reach this goal, microorganisms from the genera Ankistrodesmus, Golenkinia, Monoraphidium and Scenedesmus were used, as a function of their availability, easiness of cultivation and morphological differences. Preliminary tests were performed using distinct biosorbent concentrtions, with the purpose of observing the effect of this factor in the efficiency of copper uptake process. Tests performed in batch conditions, also included kinetics and equilibrium studies, where it was observed that all genera tested, reached equilibrium instantaneously. For more concentrated Cu2+ solutions differences were observed among the genera tested in the time needed to reach equilibrium. Beyond this fact, it was observed a high uptake copper capacity by the microorganisms, with a high mg/g ratio. Morphological differences among the genera seemed not to significantly affect the kinetics and equilibrium of the process. Batch studies performed with the genus Golenkinia immobilized in calcium alginate, beyond the tests performed with alginate beads themselves (control experiment) aimed at verifying the effect of the immobilization in the kinetic parameters and uptake capacity. From the results obtained in batch studies with all biosorbent materials tested, kinetic models were tested for each cell (pseudo-1 and 2 order models) as well as equilibrium models (Langmuir and Freundlich isotherms). It was observed that for all genera tested, Langmuir best represented the uptake, when free cells were used, while for immobilized cells, both models could represent the experimental data
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Kapoor, Akanksha. "Core-shell InGaN/GaN wires for flexible LEDs." Thesis, Université Grenoble Alpes, 2020. http://www.theses.fr/2020GRALY013.
Повний текст джерелаАнотація:
Les hétérostructures planaires à base de puits quantiques InGaN/GaN sont désormais largement utilisées dans les diodes électroluminescentes (LED). Les LED bleues et les LED blanches à phosphores sont largement commercialisées avec des rendements d’émission de lumière très élevés. Néanmoins, il reste encore des problèmes à résoudre avec ce type de dispositifs : l’émission à plus grande longueur d'onde (rouge) avec de bonnes efficacités, le problème du la chute du rendement à forte puissance (« droop efficiency ») et l’amélioration de l’extraction de la lumière. Ce travail de thèse présente l'utilisation de fils GaN ayant une hétérostructure radiale InGaN/GaN qui peut s’avérer un choix intéressant pour le développement de nouvelles LED visibles grâce à plusieurs avantages-clés : un encombrement réduit, un rapport d'aspect élevé et une grande qualité cristalline avec de faible densité de défauts. Les fils permettent également de fabriquer des LED flexibles intéressantes pour de nouvelles applications comme les écrans enroulables, les dispositifs médicaux de petite taille et flexibles, etc. Ce travail est consacré à une étude complète qui part de la croissance auto-assemblée de fils à hétérostructures InGaN/GaN radiale plan-m par la méthode d’épitaxie en phase vapeur d’organiques métalliques, jusqu’à l’intégration des fils dans des dispositifs flexibles, en étudiant en particulier des hétérostructures émettant dans le vert. L'influence d'une sous-couche InGaN et d'un espaceur GaN est spécifiquement étudiée pour améliorer l'efficacité d’émission d'un puits quantique (PQ) unique émettant dans le bleu. On constate que la présence de l’espaceur GaN est nécessaire pour obtenir une émission efficace du PQ dans le plan-m des fils de GaN, alors qu'aucun changement n'est observé en ajoutant une sous-couche d’InGaN. De plus, des LED flexibles avec différentes longueurs d'onde telles que l'émission bleue, verte et bicolore ont été réalisées en ajustant la teneur en indium à l'intérieur des hétérostructures à puits quantiques InGaN/GaN. Cette étude approfondie corrèlent les propriétés structurelles, optiques et électriques. L'utilisation de la croissance sélective est également abordée pour essayer d’améliorer les performances des LED flexibles à nanofils mais la maitrise de la reproductibilité reste difficile à contrôler. Pour obtenir un dispositif LED flexible émettant une lumière blanche, une étude d'optimisation des phosphores combinés à la LED bleue a également été réaliséeThe InGaN/GaN-based planar heterostructures are now widely used to produce light emitting diodes (LEDs). The blue LEDs and phosphor-converted white LEDs are already commercialized with high efficiencies. But further scope to reach long wavelength emission with improved efficiencies and mitigating issues likes efficiency droop and poor light extraction still remains. This Ph.D. thesis presents the use of core-shell InGaN/GaN wires as an attractive choice for visible LEDs thanks to their smaller footprint, high aspect ratio and low defect density. The bendable wires also allow fabricating LEDs with flexibility in view of rapidly growing demands for rollable displays, wearable devices, flexible biomedical instruments, etc. This work focuses on a complete study, beginning from the self-assembled growth of m-plane core-shell InGaN/GaN wires by metal organic vapor phase epitaxy to their integration in working devices on flexible substrates, especially on original green-emitting heterostructures. The influence of an InGaN under layer (UL) and GaN-spacer is investigated to improve the efficiency of a blue single quantum well. It is found that the presence of a GaN spacer is required to achieve efficient m-plane emission from core-shell wires, while no internal quantum efficiency change is observed by adding an InGaN UL. Further, flexible LEDs with different wavelengths such as blue, green and dual-color emission have been realized by tuning the indium content inside InGaN/GaN multiple quantum well heterostructures followed by a comprehensive study correlating structural, optical and electrical properties. The use of selective area growth is also approached to address the issues encountered in device emission and remaining challenges in the reproducibility control are discussed. To target white light emission, an optimization study of yellow phosphors combined with the well-established blue LED has also been performed
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Zaccheo, Paulo Vicente Contador. "Sistema radicular de adubos verdes em pomar cítrico." Universidade Estadual de Londrina. Centro de Ciências Agrárias. Programa de Pós-Graduação em Agronomia, 2011. http://www.bibliotecadigital.uel.br/document/?code=vtls000162552.
Повний текст джерелаАнотація:
A adubação verde é uma prática que consiste no cultivo de determinadas espécies vegetais, também chamadas de plantas de cobertura, em rotação ou em consórcio com culturas de interesse econômico. Busca-se, principalmente, através da utilização dessas plantas, preservar ou/e restaurar os teores de matéria orgânica no solo, ciclar nutrientes perdidos por lixiviação e proteger o solo contra a radiação solar, a precipitação excessiva e a erosão. Portanto, a escolha de espécies com grande potencial de aporte de matéria seca e com sistema radicular vigoroso e profundo é fundamental para potencializar esses efeitos benéficos. Os objetivos do trabalho foram avaliar o aporte de matéria seca da parte aérea e do sistema radicular de três plantas de cobertura de verão (Crotalaria juncea, capim pé-de-galinha gigante e mucuna preta) a densidade de comprimento radicular e suas respectivas profundidades efetivas, nas entrelinhas de um pomar cítrico, sobre dois sistemas de preparo de solo (plantio direto e convencional). O experimento foi conduzido nas entrelinhas de um pomar de laranjeiras 'Pêra Rio' (Citrus sinensis (L) Osbeck) enxertadas sobre limoeiro 'Cravo' (Citrus limonia Osbeck), implantado em 1998, com espaçamento de 7,0 x 4,0 m, localizado na Fazenda Escola da Universidade Estadual de Londrina. As avaliações das raízes foram feitas com o método do trado e as amostras foram estratificadas a 0-0,10; 0,10 - 0,20; 0,20 - 0,30; 0,30 - 0,40; 0,40 - 0,50 e 0,50 - 0,60 m de profundidade. O delineamento experimental utilizado foi de blocos ao acaso, com quatro repetições, sendo os tratamentos arranjados em esquema fatorial 2 x 3 (dois sistemas de preparo de solo e três espécies de plantas de cobertura). Os dados foram submetidos à análise de variância e ao teste Tukey a 5% de significância. O sistema de preparo de solo não altera o aporte de matéria seca (parte aérea e raízes), a densidade de comprimento radicular (cm cm-3 solo) e a profundidade efetiva das raízes das plantas de cobertura avaliadas. A Crotalaria juncea aporta ao solo maior quantidade de matéria seca proveniente da parte aérea. O capim pé-de-galinha gigante possui maior densidade de comprimento radicular na camada superficial do solo, enquanto que, no total das profundidades avaliadas, a densidade de comprimento radicular do capim pé-de-galinha gigante é superior à da mucuna preta; porém, não difere da Crotalaria juncea. Não há diferença entre as profundidades efetivas das raízes da Crotalaria juncea, capim pé-de-galinha gigante e mucuna preta. Os cultivos de Crotalaria juncea, capim pé-de-galinha gigante e mucuna preta não alteram a densidade e a umidade do solo, após um ciclo agrícola.Green manure is a practice that consists in the cultivation of certain plant species; it is also called cover crops, in rotation or intercropped with cash crops. The main aims, of using such plants, are to preserve and/or restore the levels of soil organic matter, cycle nutrients lost through leaching, soil protection against solar radiation, excessive precipitation and erosion. Therefore, the choice of species with great potential for dry matter intake, vigorous and deep root system is essential to maximize these benefits. The objectives of the this study were to evaluate the contribution of dry matter of shoots and roots of three summer cover crops (Crotalaria juncea, finger millet and velvet bean) under two systems of tillage (no tillage and conventional) and to determine the root length density(cm cm-3) and their effective depths, between the lines of citrus orchard. The experiment was conducted between the lines of an orchard of sweet orange trees 'Pêra Rio' (Citrus sinensis (L) Osbeck) grafted on Rangpur lime (Citrus limonia Osbeck), established in 1998, spaced 7x4 m, located in the Farm School of the Universidade Estadual de Londrina, UEL. Root samples were made with the auger method and the samples were stratified at depths; 0.00 - 0.10, 0.10 - 0.20, 0.20 - 0.30, 0.30 - 0.40, 0.40 - 0.50 and 0.50 - 0.60 m from the soil surface. The experimental design was randomized blocks with four replications and treatments arranged in a factorial 2 x 3 (two tillage systems and three species of cover crops). The data were analyzed by ANOVA and Tukey test at 5% significance level. The system of tillage does not affect the intake of dry matter (shoots and roots), root length density (cm cm-3) and the effective roots depth of the tested cover crops. Crotalaria juncea resulted in the greatest amount of shoot dry matter. The finger millet has the higher root length density (cm cm-3) in the topsoil and in all soil layers was higher than that of black velvet, while there were no significant differences with Crotalaria juncea. However, there were no difference between the effective root depths of Crotalaria juncea, finger millet and velvet bean. Moreover, growing Crotalaria juncea, finger millet and velvet bean does not change the soil moisture and density after an agricultural season.
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Bjork, Andreas. "Characterizing magnetic susceptibility and remanent magnetization of magnetite and hematite rich drill-core samples at Blötberget." Thesis, Uppsala universitet, Geofysik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-347975.
Повний текст джерелаАнотація:
Laboratory magnetic measurements are used to develop a methodology to characterize the Kiruna-type Rare Earth Elements (REE) bearing apatite iron-oxide deposits at Blötberget in central Sweden. This high-grade ore deposit is known to have sharp boundaries between lens shaped main ore bodies of magnetite-rich ore, and a complex hematite-rich ore associated with pegmatites and skarn formation. The thesis covers laboratory magnetic measurements of 37 samples originating from eight drill cores and reference samples from previously mined area. It focuses on on-covering how the samples relate in terms of magnetic susceptibility, further its dependency on temperature, frequency, field and the orientation. The results are correlated with petrographic analysis previously performed on accompanying thin sections. The measurements show that magnetite with strong susceptibility contribution overshadow the hematite contribution in the samples. Transition changes in susceptibility are noticeable when crossing the Verwey temperature; -153°C, Curie temperature; 580°C and Néel temperature; 680°C. The Morin temperature appears at -60°C, or is missing. Linear relationships are identified between the magnitude difference in susceptibilities across transitions at high temperature and wt% magnetite and hematite have been identified. The Blötberget skarn and hematite-rich ore samples have a higher degree of susceptibility anisotropy than the other ore-types. Blötberget samples are dominated by multidomain characteristics in remanence, saturation and coercivity. High temperature measurements have shown that the magnetite is close to pure. The low temperature measurements suggest hematite is impure or bears a petrological footprint. The study also shows that rich iron ore samples sometimes can be at risk of being overlooked with standard methods of measuring susceptibilityLaboratorietekniska metoder kan användas som ett komplement till malmgeologi och geofysisk prospektering. I denna metodstudie karaktäriseras apatitjärnmalm från Blötberget, nära Grängesberg. En fyndighet bestående av linsformade malmkroppar rika på magnetit och ofta avskilda men komplexa hematitrika stråk. Studien är gjord 37 prover från totalt 8 borrkärnor, och lokaler som tillhörde produktion från gruvverksamhet under 1900-talet. Mätmetoderna fokuserar på att kartlägga malmens magnetiska egenskaper, och hur temperatur, frekvens, fältstyrka samt riktning påverkar dessa. Resultaten jämfördes med tidigare petrografisk studie av tillhörande tunnslip Resultaten visar att magnetit står för merparten av susceptibiliteten i proverna, men att även hematit kan urskiljas och kvantifieras. Temperaturberoende har påvisats vid övergångar för Verwey-temperatur; -153°C, Curie-temperatur; 580 °C, och Néeltemperatur; 680 °C. Den förväntade Morin-temperaturen vid -14°C, påträffades vid -60 °C eller saknas helt för flera av de hematitrika proverna. Magnetiskt anisotropa prover återfinns bland prover som identifierats som skarn eller hematitrika. Magnetisk granulometri visar karaktär av multidomäntyp med låg magnetisk coercivitet och hög satureringsförmåga. Högtemperaturmätningar av susceptibilitet visar på ren magnetit för prover från Blötberget. Samtidigt visar lågtemperaturemätningar att hematit sannolikt har inblandning av titanium eller bär på ett mer komplext förflutet. Studien visar också att det finns en risk i att enbart förlita sig på bulksusceptibilitet för prover rika på malm.
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Beltrán, Suito Rodrigo. "Surprisingly green: copper and its pigments." Revista de Química, 2013. http://repositorio.pucp.edu.pe/index/handle/123456789/99887.
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El premio Ig Nobel de Química 2012 fue otorgado al ingeniero sueco Johan Petterson por explicar que el cobre era el responsable de teñir el cabello de verde a los habitantes de una pequeña población sueca. En la naturaleza existen numerosos compuestos verdes de cobre, que se usan como pigmentos, y está presente también en las hemocianinas, enzimas sanguíneas de algunos artrópodos y moluscos.The 2012 Ig Nobel Prize in Chemistry was awarded to Johan Petterson, a Swedish engineer who discovered that copper was responsible for turning hair green in a little Swedish town. Many green copper compounds used as pigments are present in nature and there are also the hemocyanins, copper-containing proteins found in the blood of some arthropods and mollusks.
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Marini, Carolina Barbosa. "Toxicidade e bioacumulação de cobre em micro-organismos fotoautotróficos." Universidade do Estado do Rio de Janeiro, 2009. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=2689.
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Microalgas e cianobactérias têm sido amplamente recomendadas para biomonitoração de metais pesados e outros poluentes, sendo considerados indicadores sensíveis às alterações ambientais e utilizados como organismos testes na regulamentação dos níveis de metal. Estes micro-organismos fotossintetizantes são produtores primários da base da cadeia alimentar aquática e são os primeiros a serem afetados pela poluição por metais pesados. O cobre é um metal normalmente considerado como nutriente essencial para a vida aquática mas pode ser tóxico para algumas espécies. Portanto, neste estudo foram avaliados o efeito tóxico e a bioacumulação de cobre (II) em quatro espécies de micro-organismos fotoautotróficos componentes do fitoplâncton dulcícola, duas cianobactérias filamentosas (Anabaena sp. e Oscillatoria sp) e duas microalgas da classe das clorofíceas (Monorraphidium sp. e Scenedesmus sp.). O meio de cultivo utilizado nos ensaios foi o ASM-1 com e sem a presença de cobre (0,6 mg/L a 12 mg Cu2+/L) onde, o efeito tóxico do metal foi monitorado por contagem celular para as microalgas e por peso seco para as cianobactérias. A bioacumulação do metal foi avaliada da mesma forma para todos os micro-organismos, através de coletas de amostras no decorrer do experimento e determinação da concentração de cobre em solução por espectrometria de absorção atômica com chama. Os resultados obtidos mostram que o efeito tóxico do metal é diretamente proporcional à concentração inicial para os micro-organismos estudados, mas que o cobre (II) foi mais tóxico para as cianobactérias que para as microalgas verdes. A bioacumulação teve uma relação direta com o efeito tóxico do metal sobre os micro-organismos. Os resultados obtidos permitem sugerir que cobre (II) tem efeito negativo no fitoplâncton, inibindo o crescimento e alterando parâmetros metabólicos como a fotossíntese. A bioacumulação do metal pode comprometer os níveis tróficos da cadeia alimentar, afetando seu transporte para seres superioresMicroalgal and cyanobacterial cells are widely used in the biomonitoring of metal contaminated areas as well as other pollutant agents, being considered sensitive microorganisms in relation to environmental changes and also used as test-organisms in the regulation of low levels of metals. These photosynthesizing microorganisms are primary producers in the aquatic food chain, and are the first ones to be affected by heavy metal pollution. Copper is a metal usually considered as an essential nutrient for aquatic forms of life, however toxic for some species. In this way, in the present study, the toxic effect of copper ion and its bioaccumulation by photoautotrophic microbes from freshwater phytoplankton: two filamentous cyanobacteria (Anabaena sp. and Oscillatoria sp) and two chlorophyte microalgae Monorraphidium sp. and Scenedesmus sp.). The culture medium used in the tests was the ASM-a medium in absence and contaminated with copper ion (0,6 mg/L to 12 mg Cu2+/L). The toxic effect of copper was monitored through cell count (microalgal cells) and dry weight measurements (cyanobacterial cells), and copper bioaccumulation was evaluated for all the species tested, through determination of the residual metal concentration in solution, by flame atomic absorption spectrometry. Results obtained indicated that the toxic effect of the metal was directly proportional to the initial concentration of the ion for all the species tested; however, copper ion was more toxic to cyanobacterial than to microalgal cells. The bioaccumulation of copper was directly related to the toxic effect of the ion over the microorganisms. Results obtained suggest that copper ion has a negative effect on the phytoplankton, inhibiting cell growth and also affecting metabolic parameters such as photosynthesis. The bioaccumulation of the metal can markedly affect the trophic levels in the food chain, thus affecting its transport to higher species
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Fornarolli, Donizeti Aparecido. "Herbicidas residuais associados a dessecantes em diferentes coberturas verdes e secas nas culturas de soja e milho." Universidade Estadual de Londrina. Centro de Ciências Agrárias. Programa de Pós-Graduação em Agronomia, 2007. http://www.bibliotecadigital.uel.br/document/?code=vtls000129780.
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Dentre as tecnologias que possam contribuir para a realização de uma agricultura sustentável, destaca-se o plantio direto, caracterizado pela abertura de um sulco estreito no solo, com profundidade suficiente para promover a cobertura das sementes e caracterizado pelo não revolvimento do solo. Neste sistema é comum a presença de vários tipos de coberturas vegetais. Aplicação de herbicidas dessecantes é recomendada 10 dias antes do plantio das culturas e posterior são recomendados herbicidas residuais. Nem sempre essas recomendações são rigorosamente realizadas, e os residuais têm sido adicionados aos dessecantes visando evitar uma aplicação e a ocorrência de reinfestações. Essa modalidade, de acordo com o tipo e a densidade da cobertura vegetal, poderá interceptar a chegada dos herbicidas residuais ao solo, e comprometer o controle das reinfestações. No sistema de plantio direto prováveis efeitos alelopáticos das coberturas, interferem na dinâmica das populações, reduzindo as reinfestações e desta forma o herbicida associado ao dessecante foi desnecessário. Experimentos em campo e bioensaios foram conduzidos em varias regiões do Brasil, aplicando-se os herbicidas imazaquin, diclosulam, trifluralin, imazethapyr, chlorimuron em soja, e, atrazine, simazina, alachlor em milho, associados aos dessecantes sobre coberturas verdes de aveia, milheto, trigo, vegetação natural em baixa e alta densidade. Os mesmos herbicidas foram aplicados sobre as coberturas mortas após o plantio das culturas. Os resultados mostraram que as coberturas mortas dessecadas oriundas de aveia e milheto reduziram significativamente a ressurgências das espécies gramíneas, sendo pouca ou nula nas coberturas de trigo colhido e vegetação natural. As coberturas pouco influenciaram na redução da ressurgências das espécies dicotiledôneas. A cobertura de milheto desde a emergência até na condição de cobertura morta, pontualmente, mostrou influenciar na redução da reinfestação das gramíneas e dicotiledôneas. A maioria dos herbicidas residuais foi retido pelas coberturas verdes, e mesmo após chuva simulada em 20 mm, não atingiram o solo, comprometendo o controle das ressurgências. O diclosulam mostrou ser o mais lixiviado das coberturas verdes para o solo, porém, algumas vezes em quantidade inadequada para o controle da ressurgência. Quando aplicados sobre as coberturas mortas, todos lixiviaram para o solo após chuva simulada em 20 mm e controlaram as ressurgências. Os tratamentos somente dessecantes e convencional apresentaram ressurgências das infestantes desde nula até em alta densidade, e o controle era nulo ou superior a 85%. A aplicação de residuais associados aos dessecantes, poderá promover o desperdício desses herbicidas, aumentando a contaminação ambiental, permitindo a competição das espécies daninhas com a cultura, e onerar mais o custo de produção. Conhecer previamente as condições da cobertura vegetal, a densidade, a quantidade em t/ha e o tipo de cobertura, é de fundamental importância quanto à modalidade de aplicação a ser empregada.No-tillage is a technology to contribute to sustainable agriculture. Characterized by no tillage of soil, in this system, desiccant herbicides are commonly applied, promoting straw mulch from various natural species or specific plants like oat, barley, wheat, millet, and sorghum. Desiccant herbicide applications are recommended 10 days before crop planting. Residual herbicide applications are recommended immediately after crop sowing to avoid new weed generation. Therefore, residual herbicides have been applied in tanks mixed with desiccant. The objective is to avoid another application after crop emergence, in the no-tillage system, the straw mulchs probable allopathic effects can influence or interfere with new weed generations, reducing their population density significantly when compared to full tillage systems. The residual herbicides application modality added to desiccants when over fresh plants, depending on the straw mulchs density, may intercept the residual herbicides leaching to the soil and compromise the new weed generation control. On the other hand, depending on seed bank potential and straw mulch kind and density, there may be no weed re-infestation, making the herbicide unnecessary. For a better understanding of those interactions various field experiments and bioassays were carried out in various Brazilian regions, applying residual herbicides such as imazaquin, diclosulam, imazethapyr, chlorimuron, trifluralin in soybean and atrazina, simazina and alachlor in corn crops, associated to desiccants over fresh plantings of oat, wheat, millet and natural vegetation in low and high density. The same residuals were applied in dead straw mulches as well. The results have showed that dead and desiccated straw mulch from oat and millet significantly reduced new grass generation and did not influence the broadleaves. Straw mulch from wheat and natural vegetation showed practically no influence to reduce grass and broadleaf generation. In some experiments there is not any new generation. The fields results and bioassays showed that the residual herbicides had been retained by fresh plants, and not even a 20mm rain simulation was able to make them reach the soil, compromising the control of new generation.The diclosulam herbicides showed the most leaching from fresh plants, but at some points the leached amount wasnt enough to promote resurgence control. All herbicides were leached from the straw mulch after irrigation and had promoted a perfect control of new weed generation. The only burn down and conventional treatment presented infesting resurgences from none to high densities with a variation between none or over 85% in controlling resurgence. In no-tillage systems, the tank mix with residual and desiccants applied over fresh plants showed no confidence to avoid new weed generation. Those results should be taken in conjunction with existing knowledge about the vegetal cover type and conditions to decide the best approach in order to avoid herbicide or energy wastes, increase of environmental contamination and production costs.
Книги з теми "CORE VERTEX"
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Ian, Butterworth, ed. Where did that baby come from? London: Picture Corgi Books, 2005.
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Where did that baby come from? London: Doubleday, 2004.
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Märzhäuser, Christina. Portugiesisch und Kabuverdianu in Kontakt: Muster des Code-switching und lexikalische Innovationen in Raptexten aus Lissabon. Frankfurt am Main: P. Lang, 2011.
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Quoss-Moore, Rebecca M. Gender and Position-Taking in Henrician Verse. Nieuwe Prinsengracht 89 1018 VR Amsterdam Nederland: Amsterdam University Press, 2023. http://dx.doi.org/10.5117/9789463723534.
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Tradition, translation, and transcription in Henrician verse functioned together in systems of communally created, coded position-taking. Understanding this system as an extensive network of production and reception in which women took on many roles allows for new readings of Henrician verse that emphasize the interpretive range available to contemporary reading and writing communities. This restoration demasculinizes our approach to Henrician verse not only through a more equitable consideration of gender’s functions in that social world, but also in de-emphasizing individualized self-fashioning or authorial intent in favor of an engagement with communal production and shared sociopolitical engagement. The creation in this system is not of a code, but of systems for coding and recognizing position-taking. These communal systems offer a site for the intersection of reader and writer, of transcriber and composer, and of King and courtier in a space that questions, creates, and troubles power in the Henrician court.
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Descarie, Chantal. Le cahier bleu du Code vert: Exercices de grammaire pour le primaire : 4e primaire. Laval, Québec: HRW, 1994.
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Andreev, Anatoliy. Personocentrism in classical Russian literature of the XIX century. Dialectics of Artistic Consciousness. ru: INFRA-M Academic Publishing LLC., 2021. http://dx.doi.org/10.12737/1095050.
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The monograph is devoted to the study of the brightest phenomenon of the world art culture — Russian literature of the "golden age", which was formed as an aristocratic, personocentric literature. Russian Russian literature began to realize its "cultural code", its purpose, which was close to it in spirit; moreover, it unconsciously formed a program for its development, immediately finding its "gold mine": elitist personocentrism as a highly promising vector of culture, which became a decisive factor in the world recognition of Russian literature. The end-to-end plot of the book was the spiritual biography of the" extra person", a person, a personality. The author suggests that the starting point in the Russian cultural identification of the modern type is "Eugene Onegin" by A. S. Pushkin. This novel in verse, which embodied the type of "superfluous", determined not only the specifics and strategy of the development of Russian literature (which is proved by the analysis of the key classical works of the XIX century-from Griboyedov to Chekhov); in fact, it formed a program for the development of modern world literature.
For specialists in literature, teachers and students of philological faculties of universities. It will also be useful for cultural scientists, specialists in literary and artistic creativity.
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Miller, Davis. Viaja al centro de la tierra. Minneapolis: Stone Arch Books, 2010.
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Bernard, Triomphe, Sain Gustavo, International Development Research Centre (Canada), and International Maize and Wheat Improvement Center., eds. Cover crops in hillside agriculture: Farmer innovation with mucuna. Ottawa: International Development Research Centre, 1998.
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Oliveira, Warlley Fernandes, Nívea Taís Vila, Alexandre José Sousa Ferreira, Simone Fiori, and Márcia Gomes da Silva. Tingimento natural de algodão cationizado com extrato dos frutos de jenipapo (Genipa americana L.). Seven Editora, 2022. http://dx.doi.org/10.56238/sevedi40374-010.
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A maioria dos corantes naturais é extraída de fontes vegetais que podem fornecer uma variedade de cores e tonalidades diferentes. Apesar disso, as fontes naturais de tons de azul são muito raras e de complexa estabilização, dificultando a aplicação desses corantes em substratos têxteis. Nesse contexto, os frutos do jenipapo (Genipa americana L.) encontrados no Brasil são uma fonte de coloração azul natural com grande potencial para a indústria têxtil. O objetivo deste estudo inicial foi investigar o tingimento do algodão com o extrato obtido a partir dos frutos verdes de jenipapo, onde foi avaliada a estabilização da cor azul do extrato. O tingimento foi otimizado considerando a influência das variáveis temperatura e pH do banho de tingimento na intensidade de cor dos tecidos tingidos. Também foi avaliado o fator de proteção UV (UPF) das amostras tingidas nas condições otimizadas. O extrato dos frutos verdes de jenipapo se mostrou estável no intervalo de tempo estudado. O melhor resultado de intensidade de cor foi obtido na temperatura de 80 °C e pH 4,0. O fator de proteção UV (UPF) dos tecidos tingidos apresentou um aumento significativo após o processo de tingimento. As propriedades de solidez à lavagem e à fricção também foram avaliadas.
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Ahuja, Christopher S., and Michael Fehlings. Neuroprotection for Spinal Cord Injury. Edited by David L. Reich, Stephan Mayer, and Suzan Uysal. Oxford University Press, 2017. http://dx.doi.org/10.1093/med/9780190280253.003.0015.
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Traumatic spinal cord injuries (SCI) often have a devastating impact on quality of life for patients and their families. Neuroprotection for spinal cord injury is aimed at improving functional outcomes by limiting secondary injury processes that occur within the first minutes, hours, and days following the primary injury. The primary mechanical trauma initiates a secondary injury cascade where ischemia, inflammatory cell infiltration, and cytotoxic changes in the microenvironment cause further cell death and loss of function. Time-sensitive neuroprotective measures targeting these secondary insults have emerged as key therapeutic strategies. This chapter summarizes current evidence-based neuroprotective treatments, such as blood pressure augmentation, early surgical decompression, and intravenous methylprednisolone, as well as important emerging interventions, including therapeutic hypothermia, sodium channel blockade using riluzole, and the anti-inflammatory actions of minocycline. The chapter concludes by summarizing the current guidelines that all practitioners should be well-versed in prior to providing care for patients with SCI.
Частини книг з теми "CORE VERTEX"
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Hoepfner, Kerstin. "A Radiation-Hard Vertex Detector Based on Liquid-Core Fibres." In International Europhysics Conference on High Energy Physics, 1069–70. Berlin, Heidelberg: Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/978-3-642-59982-8_201.
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Hanke, F., A. Marek, B. Müller, and H. Th Janka. "The SuperN-Project: Porting and Optimizing VERTEX-PROMETHEUS on the Cray XE6 at HLRS for Three-Dimensional Simulations of Core-Collapse Supernova Explosions of Massive Stars." In High Performance Computing in Science and Engineering ‘12, 81–93. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-33374-3_8.
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Avis, David, and Gary Roumanis. "A Portable Parallel Implementation of the lrs Vertex Enumeration Code." In Combinatorial Optimization and Applications, 414–29. Cham: Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-03780-6_36.
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Lam, Ching Hung. "Fusion rules for ternary and ℤ₂×ℤ₂ code vertex operator algebras." In CRM Proceedings and Lecture Notes, 85–98. Providence, Rhode Island: American Mathematical Society, 2001. http://dx.doi.org/10.1090/crmp/030/08.
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Wulandhari, Lili A., Habibollah Haron, and Roselina Sallehuddin. "The Mapping Algorithm of Triangular Vertex Chain Code from Thinned Binary Image." In Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, 108–13. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-32573-1_17.
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Clackdoyle, Rolf, Michel Defrise, and Frédéric Noo. "Early Results on General Vertex Sets and Truncated Projections in Cone-Beam Tomography." In Computational Radiology and Imaging, 113–35. New York, NY: Springer New York, 1999. http://dx.doi.org/10.1007/978-1-4612-1550-9_7.
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Verter, Frances, and Kyle J. Cetrulo. "Interview with Frances Verter, Founder of Parent's Guide to Cord Blood Foundation." In Perinatal Stem Cells, 259–69. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118497883.ch18.
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El-Ali, Leena. "Clothing: There Is No Dress Code for Women Beyond Covering their Private Parts, as with Men." In Sustainable Development Goals Series, 205–25. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-83582-8_16.
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AbstractMost of us grow up assuming that the Qur’an stipulates that women must cover their hair and wear clothing that covers all skin except for the face, hands and feet. Yet there is no dress code whatsoever for either men or women beyond covering their private parts (and there is no ambiguity whatsoever in the Qur’an about what those are). Meanwhile the Qur’an refers to clothing as something that is meant to be beautiful, a gift from God that no one can forbid and states that, nonetheless, no clothing can rival the clothing of reverence. Why do we never hear of these beautiful verses?
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El-Ali, Leena. "Inheritance: No, Women Did Not Get the Short End of the Stick." In Sustainable Development Goals Series, 125–38. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-83582-8_12.
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AbstractIn constructing a socio-economic identity for women, the Qur’an introduces their right to inherit as a pillar of its vision for a just society. But at the same time, inheritance allocations henceforth would be tied directly to family responsibilities, hence the 2:1 ratio for sons-to-daughters for a society where women were almost never breadwinners. This conditionality is found in the much-misunderstood verse 4:34 that we must re-read in the context of its neighbouring verses, which are specifically on inheritance. It would be wrong to conclude that women got the short end of the stick for two reasons: a) because every man’s and every woman’s inheritance could now potentially come from multiple relatives and not just from parents, so it is hard to know precisely where the chips will ultimately fall for a given person; and b) because the Qur’an allocated no financial responsibilities to women the way it did to men, so the net effect could be in favour of either, relatively speaking. However in today’s world, many daughters and wives are very much breadwinners for their families, yet no religious authority has so far acted upon the conditionality expressed in verse 4:34.
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Gebremedhin, Assefaw, Mostofa Patwary, and Fredrik Manne. "Paradigms for Effective Parallelization of Inherently Sequential Graph Algorithms on Multi-Core Architectures." In Advances in Systems Analysis, Software Engineering, and High Performance Computing, 74–95. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-7156-9.ch005.
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The chapter describes two algorithmic paradigms, dubbed speculation and iteration and approximate update, for parallelizing greedy graph algorithms and vertex ordering algorithms, respectively, on multicore architectures. The common challenge in these two classes of algorithms is that the computations involved are inherently sequential. The efficacy of the paradigms in overcoming this challenge is demonstrated via extensive experimental study on two representative algorithms from each class and two Intel multi-core systems. The algorithms studied are (1) greedy algorithms for distance-k coloring (for k = 1 and k = 2) and (2) algorithms for two degree-based vertex orderings. The experimental results show that the paradigms enable the design of scalable methods that to a large extent preserve the quality of solution obtained by the underlying serial algorithms.
Тези доповідей конференцій з теми "CORE VERTEX"
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Zhou, Zhongxin, Fan Zhang, Xuemin Lin, Wenjie Zhang, and Chen Chen. "K-Core Maximization: An Edge Addition Approach." In Twenty-Eighth International Joint Conference on Artificial Intelligence {IJCAI-19}. California: International Joint Conferences on Artificial Intelligence Organization, 2019. http://dx.doi.org/10.24963/ijcai.2019/676.
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A popular model to measure the stability of a network is k-core - the maximal induced subgraph in which every vertex has at least k neighbors. Many studies maximize the number of vertices in k-core to improve the stability of a network. In this paper, we study the edge k-core problem: Given a graph G, an integer k and a budget b, add b edges to non-adjacent vertex pairs in G such that the k-core is maximized. We prove the problem is NP-hard and APX-hard. A heuristic algorithm is proposed on general graphs with effective optimization techniques. Comprehensive experiments on 9 real-life datasets demonstrate the effectiveness and the efficiency of our proposed methods.
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Hidzir, Nurhafizahtulhusna Binti, and Syarifah Zyurina Binti Nordin. "Vertex and edge coloring method for timetabling problem in minimizing the time frame." In PROCEEDING OF THE 25TH NATIONAL SYMPOSIUM ON MATHEMATICAL SCIENCES (SKSM25): Mathematical Sciences as the Core of Intellectual Excellence. Author(s), 2018. http://dx.doi.org/10.1063/1.5041605.
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Wan, Sha, Yunbao Huang, Qifu Wang, Liping Chen, and Yuhang Sun. "A New Approach to Generic Design Feature Recognition by Detecting the Hint of Topology Variation." In ASME 2012 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/detc2012-70760.
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Current design feature recognition mainly depends on the connective attributes of edges or faces in the CAD models, such as convexity, concavity, and tangency. However, it is difficult to uniquely define the mixed connective attributes of the generic features in some cases. A novel generic design feature recognition approach by detecting the hint of topology variation is presented in this study. The core idea includes: 1) the resulting CAD model of a complex part is regarded as formed from an initial basic shape such as roughcast and has been operated by introducing generic design features, which subsequently may cause topology variation; 2) Such topology variations, e.g. vertex elimination, edge partition and face alteration, are utilized to obtain generalized properties of the generic design features, dispensing with the connective attributes. Finally, 1) we demonstrate in the experiments that the approach successfully recognizes the main types of generic design features, both isolate and hybrid features. 2) Furthermore, we exhibit the application of the approach in some engineering examples.
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Estrada, Spenser, Emilyn Green, Sogol Jahanbekam, and Sara Behdad. "Design for Flexibility: A Graph Coloring Technique to Study Design Changes in the Tethered Economy World." In ASME 2020 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/detc2020-22559.
Повний текст джерелаАнотація:
Abstract Digitization, connected networks, embedded software, and smart devices have resulted in a major paradigm shift in business models. Transformative service-based business models are dominating the market, where advancement in technology has paved the way for offering not only a set of new services but also altering product functionalities and services over time. This paradigm shift calls for new design approaches. Designers should be able to design flexible products and services that can adapt to a wide range of consumer needs over time. To address the need for designing for flexibility, the objective of this study is to develop a graph coloring technique that can model changes in the functional requirements of a product and determine the minimum number of physical parts needed to meet future functionalities. This technique relies on vertex labeling by the designer and the construction of a core graph combining key elements of all desired iterations, which is then colored by label. One numerical example and one real-world example are provided to show the application of the proposed model.
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Liu, Jie, Na Li, and Zhicheng He. "Network Embedding with Dual Generation Tasks." In Twenty-Eighth International Joint Conference on Artificial Intelligence {IJCAI-19}. California: International Joint Conferences on Artificial Intelligence Organization, 2019. http://dx.doi.org/10.24963/ijcai.2019/709.
Повний текст джерелаАнотація:
We study the problem of Network Embedding (NE) for content-rich networks. NE models aim to learn efficient low-dimensional dense vectors for network vertices which are crucial to many network analysis tasks. The core problem of content-rich network embedding is to learn and integrate the semantic information conveyed by network structure and node content. In this paper, we propose a general end-to-end model, Dual GEnerative Network Embedding (DGENE), to leverage the complementary information of network structure and content. In this model, each vertex is regarded as an object with two modalities: node identity and textual content. Then we formulate two dual generation tasks. One is Node Identification (NI) which recognizes nodes’ identities given their contents. Inversely, the other one is Content Generation (CG) which generates textual contents given the nodes’ identities. We develop specific Content2Node and Node2Content models for the two tasks. Under the DGENE framework, the two dual models are learned by sharing and integrating intermediate layers, with which they mutually enhance each other. Extensive experimental results show that our model yields a significant performance gain compared to the state-of-the-art NE methods. Moreover, our model has an interesting and useful byproduct, that is, a component of our model can generate texts, which is potentially useful for many tasks.
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Dordinejad, Golara Ghorban, and Hakan Cevikalp. "Cone vertex estimation in polyhedral conic classifiers." In 2017 25th Signal Processing and Communications Applications Conference (SIU). IEEE, 2017. http://dx.doi.org/10.1109/siu.2017.7960191.
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Drasal, Zbynek, Kolja Prothmann, and Benjamin Schwenker. "Silicon Simulation Code for Belle II and ILC." In The 20th Anniversary International Workshop on Vertex Detectors. Trieste, Italy: Sissa Medialab, 2012. http://dx.doi.org/10.22323/1.137.0027.
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Felix, Juliana P., and Márcia R. Cappelle. "Bounds on Identifying Codes in the Cartesian Product of a Star and a Path Graph." In Encontro de Teoria da Computação. Sociedade Brasileira de Computação - SBC, 2023. http://dx.doi.org/10.5753/etc.2023.230607.
Повний текст джерелаАнотація:
In a graph, an identifying code (or ID code, for short) is a dominating set with the property that the closed neighborhood of each vertex in the graph has a distinct intersection with the set. Thus every vertex can be uniquely identified by this intersection. The ID code number of a graph G is the minimum cardinality of an ID code of G and is denoted by γID(G). We present lower and upper bounds for γID in the Cartesian product of star and path graphs.
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Yu, Guofang, and Yujie Zhang. "Research on compression and improvement of vertex chain code." In Sixth International Symposium on Multispectral Image Processing and Pattern Recognition, edited by Tianxu Zhang, Bruce Hirsch, Zhiguo Cao, and Hanqing Lu. SPIE, 2009. http://dx.doi.org/10.1117/12.833601.
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Wang, Songtao, Zhongqi Wang, and Guotai Feng. "Numerical Simulation of 3D Flow Field Structure in Turbine Cascade With Bowed Blades." In ASME Turbo Expo 2001: Power for Land, Sea, and Air. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/2001-gt-0442.
Повний текст джерелаАнотація:
The differences of flow field in bowed blade cascade and that in straight blade cascade are systematically studied in this paper. To bow a blade means to change its geometric boundary condition. This change not only affect the pressure distribution along the blade profile exit Mach number but also has great effect on the original position and development of the passage vertex. All of the changes mentioned above have great influence on the loss. Numerical simulation result showed that blade bowing can decrease the cross-pressure gradient near the end wall. This trend will be more obvious with the increase of the bow angle. The pressure gradient decrease is beneficial to weaken the passage vortex strength and reduces the secondary loss near the endwalls. In addition, Pressure gradient from endwalls to midspan can be established near suction surface in positively bowed blade. With the increase of bow angle, this C-type pressure distribution is remarkable. It is also found that this C-type pressure distribution will influence the position of corner vortex near the suction surface and will also influence the position and size of the passage vortex. Blade bowing also has great influence on the position of the saddle point near the leading edge and the separated line of the horseshoe vortex. It is found that the position of the saddle point and the separated line of both legs of the horseshoe vortex move forward in a positively bowed blade. The passage vortex structure in bowed cascade is also presented. It can be concluded that a bowed blade can make the passage vortex stable and helps change its structure from loose to compact. Blade bowing is also beneficial to limit the influence domain of the unstable passage vortex core by the stable limit cycle.
Звіти організацій з теми "CORE VERTEX"
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Mueller, C., S. J. Piercey, M. G. Babechuk, and D. Copeland. Stratigraphy and lithogeochemistry of rocks from the Nugget Pond Deposit area, Baie Verte Peninsula, Newfoundland. Natural Resources Canada/CMSS/Information Management, 2021. http://dx.doi.org/10.4095/328989.
Повний текст джерелаАнотація:
Stratigraphic and lithogeochemical data were collected from selected drill core from the Nugget Pond gold deposit in the Betts Cove area, Newfoundland. The stratigraphy consists of a lower unit of basaltic rocks that are massive to pillowed (Mount Misery Formation). This is overlain by sedimentary rocks of the Scrape Point Formation that consist of lower unit of turbiditic siltstone and hematitic cherts/iron formations (the Nugget Pond member); the unit locally has a volcaniclastic rich-unit at its base and grades upwards into finer grained volcaniclastic/turbiditic rocks. This is capped by basaltic rocks of the Scrape Point Formation that contain pillowed and massive mafic flows that are distinctively plagioclase porphyritic to glomeroporphyritic. The mafic rocks of the Mount Misery Formation have island arc tholeiitic affinities, whereas Scrape Point Formation mafic rocks have normal mid-ocean ridge (N-MORB) to backarc basin basalt (BABB) affinities. One sample of the latter formation has a calc-alkalic affinity. All of these geochemical features are consistent with results and conclusions from previous workers in the area. Clastic sedimentary rocks and Fe-rich sedimentary rocks of the Scrape Point Formation have features consistent with derivation from local, juvenile sources (i.e., intra-basinal mafic rocks). The Scrape Point Formation sedimentary rocks with the highest Fe/Al ratios, inferred to have greatest amount of hydrothermally derived Fe, have positive Ce anomalies on Post-Archean Australian Shale (PAAS)-normalized trace element plots. These features are consistent with having formed via hydrothermal venting into an anoxic/ sub-oxic water column. Further work is needed to test whether these redox features are a localized feature (i.e., restricted basin) or a widespread feature of the late Cambrian-early Ordovician Iapetus Ocean, as well as to delineate the role that these Fe-rich sedimentary rocks have played in the localization of gold mineralization within the Nugget Pond deposit.
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Gower, D., G. Graves, S. Walker, and D. MacInnis. Lode Gold Mineralization At Deer Cove, Point Rousse Complex, Baie Verte Peninsula. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1991. http://dx.doi.org/10.4095/132262.
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Dube, B., K. Lauziere, and K. H. Poulsen. The Deer Cove deposit: an example of "thrust"-related breccia-vein type gold mineralization in the Baie Verte Peninsula, Newfoundland. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1993. http://dx.doi.org/10.4095/134265.
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Shaw, J., D. E. Beaver, and B. Wile. Marine geological surveys in northeast Newfoundland coastal waters: Hamilton Sound, Baie Verte, La Scie, Halls Bay, Little Bay, Sunday Cove Island [Cruise Report 90-035]. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1990. http://dx.doi.org/10.4095/132341.
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Abdolmaleki, Kourosh, and Andrew Rawlinson. PR-453-134504-R01 Pipeline On-Bottom Stability Software Upgrade Milestone I. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), July 2016. http://dx.doi.org/10.55274/r0010867.
Повний текст джерелаАнотація:
The PRCI software (version 3.0) which assesses hydrodynamic stability of submarine pipelines was revised. There are three 'levels' of analysis available in this software. The main technical revisions are for: - Level 1 : -The addition of the logarithmic boundary layer formulation. - Level 2: -The addition of the logarithmic boundary layer formulation -The addition of the JONSWAP spectrum -The addition of the Verley and Lund pipe-soil clay model -The resolution of the issue of excessive embedment in current dominated conditions. - Level 3 are: -The addition of the logarithmic boundary layer formulation -The addition of the JONSWAP spectrum. In terms of software, the Fortran code, which undertakes the calculation, was converted to a more recent version and a number of improvements made. The user interface was re-written in languages and an environment which are currently supported. Code was written for the future implementation of the absolute stability method of DNV-RP-F109. An investigation of lift forces which act on a submarine pipeline when subject to current at low angles of attack was undertaken. This showed that, though usual practice underestimates the lift force, the magnitude of the difference is not significant in terms of pipeline stability. This work has a related webinar.
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Abdolmaleki, Kourosh, and Andrew Rawlinson. PR-453-134504-R02 Pipeline On-Bottom Stability Software Upgrade Milestone II. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), July 2016. http://dx.doi.org/10.55274/r0010868.
Повний текст джерелаАнотація:
The scope of work for phase I of PR-453-134504 included implementation of the Verley and Lund [1] clay soil model in Level 2 of the PRCI on-bottom stability (OBS) software. Throughout the implementation process, a number of apparent discrepancies between the code and the documentation in relation to the pipe-soil interaction (PSI) model were identified and raised with PRCI. In Phase 2 INTECSEA was tasked to formalize these observations and provide more background information to PRCI for further clarification. The execution strategy was to host a series of meetings with a focused group of PRCI team members to review various topics of soil model in Level 2 and prepare a technical note that captures the issues discussed. This document presents the technical note on the PSI topics and clarifies INTECSEA's suggestions for further work on this matter. A summary of the technical queries along with ITS recommendation is presented in Table 1-1. Further detail on each topic is available within the report.