Добірка наукової літератури з теми "Kinetic data structure"
Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями
Ознайомтеся зі списками актуальних статей, книг, дисертацій, тез та інших наукових джерел на тему "Kinetic data structure".
Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.
Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.
Статті в журналах з теми "Kinetic data structure":
1
Tabak, H. H., C. Gao, S. Desai, and R. Govind. "Development of Predictive Structure-Biodegradation Relationship Models with the Use of Respirometrically Generated Biokinetic Data." Water Science and Technology 26, no. 3-4 (August 1, 1992): 763–72. http://dx.doi.org/10.2166/wst.1992.0457.
Анотація:
Biodegradation is an important mechanism determining the fate of chemicals in the aquatic environment. In this paper, experimental data, determined from electrolytic respirometry, for 27 compounds were analyzed using first order and Monod kinetics. Additional data from the literature were also used in our analysis. A method based on group contribution to predict first-order and Monod kinetic rate constants was developed and validated. The group contribution approach gave reasonable results for a variety of compounds. More kinetic data are required to extend the group contribution approach.
2
König, Matthias. "cy3sabiork: A Cytoscape app for visualizing kinetic data from SABIO-RK." F1000Research 5 (July 18, 2016): 1736. http://dx.doi.org/10.12688/f1000research.9211.1.
Анотація:
Kinetic data of biochemical reactions are essential for the creation of kinetic models of biochemical networks. One of the main resources of such information is SABIO-RK, a curated database for kinetic data of biochemical reactions and their related information. Despite the importance for computational modelling there has been no simple solution to visualize the kinetic data from SABIO-RK. In this work, I present cy3sabiork, an app for querying and visualization of kinetic data from SABIO-RK in Cytoscape. The kinetic information is accessible via a combination of graph structure and annotations of nodes, with provided information consisting of: (I) reaction details, enzyme and organism; (II) kinetic law, formula, parameters; (III) experimental conditions; (IV) publication; (V) additional annotations. cy3sabiork creates an intuitive visualization of kinetic entries in form of a species-reaction-kinetics graph, which reflects the reaction-centered approach of SABIO-RK. Kinetic entries can be imported in SBML format from either the SABIO-RK web interface or via web service queries. The app allows for easy comparison of kinetic data, visual inspection of the elements involved in the kinetic record and simple access to the annotation information of the kinetic record. I applied cy3sabiork in the computational modelling of galactose metabolism in the human liver.
3
Onodera, Andrea N., Wilson P. Gavião Neto, Maria Isabel Roveri, Wagner R. Oliveira, and Isabel CN Sacco. "Immediate effects of EVA midsole resilience and upper shoe structure on running biomechanics: a machine learning approach." PeerJ 5 (February 28, 2017): e3026. http://dx.doi.org/10.7717/peerj.3026.
Анотація:
BackgroundResilience of midsole material and the upper structure of the shoe are conceptual characteristics that can interfere in running biomechanics patterns. Artificial intelligence techniques can capture features from the entire waveform, adding new perspective for biomechanical analysis. This study tested the influence of shoe midsole resilience and upper structure on running kinematics and kinetics of non-professional runners by using feature selection, information gain, and artificial neural network analysis.MethodsTwenty-seven experienced male runners (63 ± 44 km/week run) ran in four-shoe design that combined two resilience-cushioning materials (low and high) and two uppers (minimalist and structured). Kinematic data was acquired by six infrared cameras at 300 Hz, and ground reaction forces were acquired by two force plates at 1,200 Hz. We conducted a Machine Learning analysis to identify features from the complete kinematic and kinetic time series and from 42 discrete variables that had better discriminate the four shoes studied. For that analysis, we built an input data matrix of dimensions 1,080 (10 trials × 4 shoes × 27 subjects) × 1,254 (3 joints × 3 planes of movement × 101 data points + 3 vectors forces × 101 data points + 42 discrete calculated kinetic and kinematic features).ResultsThe applied feature selection by information gain and artificial neural networks successfully differentiated the two resilience materials using 200(16%) biomechanical variables with an accuracy of 84.8% by detecting alterations of running biomechanics, and the two upper structures with an accuracy of 93.9%.DiscussionThe discrimination of midsole resilience resulted in lower accuracy levels than did the discrimination of the shoe uppers. In both cases, the ground reaction forces were among the 25 most relevant features. The resilience of the cushioning material caused significant effects on initial heel impact, while the effects of different uppers were distributed along the stance phase of running. Biomechanical changes due to shoe midsole resilience seemed to be subject-dependent, while those due to upper structure seemed to be subject-independent.
4
Roodt, Andreas. "Relevance of X-ray structure data to kinetic studies." Acta Crystallographica Section A Foundations of Crystallography 66, a1 (August 29, 2010): s6. http://dx.doi.org/10.1107/s0108767310099861.
5
Kockara, S., M. Mete, V. Yip, B. Lee, and K. Aydin. "A soft kinetic data structure for lesion border detection." Bioinformatics 26, no. 12 (June 6, 2010): i21—i28. http://dx.doi.org/10.1093/bioinformatics/btq178.
6
Aftandiliants, Ye G. "Modelling of structure forming in structural steels." Naukovij žurnal «Tehnìka ta energetika» 11, no. 4 (September 10, 2020): 13–22. http://dx.doi.org/10.31548/machenergy2020.04.013.
Анотація:
The study showed that the influence of alloying elements on the secondary structure formation of the steels containing from 0.19 to 0.37 wt. % carbon; 0.82-1.82 silicon; 0.63-3.03 manganese; 1.01-3.09 chromium; 0.005-0.031 nitrogen; up to 0.25 wt.% vanadium and austenite grain size is determined by their change in the content of vanadium nitride phase in austenite, its alloying and overheating above tac3, and the dispersion of ferrite-pearlite, martensitic and bainitic structures is determined by austenite grain size and thermal kinetic parameters of phase transformations. Analytical dependencies are defined that describe the experimental data with a probability of 95% and an error of 10% to 18%. An analysis results of studying the structure formation of structural steel during tempering after quenching show that the dispersion and uniformity of the distribution of carbide and nitride phases in ferrite is controlled at complete austenite homogenization by diffusion mobility and the solubility limit of carbon and nitrogen in ferrite, and secondary phase quantity in case of the secondary phase presence in austenite more than 0.04 wt. %. Equations was obtained which, with a probability of 95% and an error of 0.7 to 2.6%, describe the real process.
7
Khurana, Puneet, Lisa McWilliams, Jonathan Wingfield, Derek Barratt, and Bharath Srinivasan. "A Novel High-Throughput FLIPR Tetra–Based Method for Capturing Highly Confluent Kinetic Data for Structure–Kinetic Relationship Guided Early Drug Discovery." SLAS DISCOVERY: Advancing the Science of Drug Discovery 26, no. 5 (March 30, 2021): 684–97. http://dx.doi.org/10.1177/24725552211000676.
Анотація:
Target engagement by small molecules is necessary for producing a physiological outcome. In the past, a lot of emphasis was placed on understanding the thermodynamics of such interactions to guide structure–activity relationships. It is becoming clearer, however, that understanding the kinetics of the interaction between a small-molecule inhibitor and the biological target [structure–kinetic relationship (SKR)] is critical for selection of the optimum candidate drug molecule for clinical trial. However, the acquisition of kinetic data in a high-throughput manner using traditional methods can be labor intensive, limiting the number of molecules that can be tested. As a result, in-depth kinetic studies are often carried out on only a small number of compounds, and usually at a later stage in the drug discovery process. Fundamentally, kinetic data should be used to drive key decisions much earlier in the drug discovery process, but the throughput limitations of traditional methods preclude this. A major limitation that hampers acquisition of high-throughput kinetic data is the technical challenge in collecting substantially confluent data points for accurate parameter estimation from time course analysis. Here, we describe the use of the fluorescent imaging plate reader (FLIPR), a charge-coupled device (CCD) camera technology, as a potential high-throughput tool for generating biochemical kinetic data with smaller time intervals. Subsequent to the design and optimization of the assay, we demonstrate the collection of highly confluent time-course data for various kinase protein targets with reasonable throughput to enable SKR-guided medicinal chemistry. We select kinase target 1 as a special case study with covalent inhibition, and demonstrate methods for rapid and detailed analysis of the resultant kinetic data for parameter estimation. In conclusion, this approach has the potential to enable rapid kinetic studies to be carried out on hundreds of compounds per week and drive project decisions with kinetic data at an early stage in drug discovery.
8
Abolfazl Mostafavi, Mir, and Christopher Gold. "A global kinetic spatial data structure for a marine simulation." International Journal of Geographical Information Science 18, no. 3 (April 2004): 211–27. http://dx.doi.org/10.1080/13658810310001620942.
9
Zheng, Xu-Li, Dong-Hui Quan, Hai-Long Zhang, Xiao-Hu Li, Qiang Chang, and Olli Sipilä. "A new data structure for accelerating kinetic Monte Carlo method." Research in Astronomy and Astrophysics 19, no. 12 (December 2019): 176. http://dx.doi.org/10.1088/1674-4527/19/12/176.
10
LITTLE, David I., Peter C. POAT, and Ian G. GILES. "Residual Analysis in Determining the Error Structure in Enzyme Kinetic Data." European Journal of Biochemistry 124, no. 3 (March 3, 2005): 499–505. http://dx.doi.org/10.1111/j.1432-1033.1982.tb06621.x.
Дисертації з теми "Kinetic data structure":
1
Hashemi, Beni Leila. "Development of a 3D Kinetic Data Structure adapted for a 3D Spatial Dynamic Field Simulation." Thesis, Université Laval, 2009. http://www.theses.ulaval.ca/2009/26532/26532.pdf.
Анотація:
Les systèmes d'information géographique (SIG) sont employés couramment pour la représentation, la gestion et l'analyse des données spatiales dans un grand nombre de disciplines, notamment les sciences de la terre, l'agriculture, la sylviculture, la météorologie, l'océanographie et plusieurs autres. Plus particulièrement, les géoscientifiques utilisent de plus en plus ces outils pour l'intégration et la gestion de données dans différents types d'applications environnementales, allant de la gestion des ressources en eau à l'étude du réchauffement climatique. Au delà de ces possibilités, les géoscientifiques doivent modéliser et simuler des champs spatiaux dynamiques et 3D et intégrer aisément les résultats de simulation à d'autres informations spatiales associées afin d'avoir une meilleure compréhension de l'environnement. Cependant, les SIG demeurent extrêmement limités pour la modélisation et la simulation des champs spatiaux qui sont habituellement tridimensionnels et dynamiques. Ces limitations sont principalement reliées aux structures de données spatiales actuelles des SIG qui sont bidimensionnelles et statiques et ne sont pas conçues pour aborder le 3D et les aspects dynamiques des champs spatiaux 3D.
Par conséquent, l'objectif principal de ce travail de recherche est d'améliorer la capacité actuelle des SIG concernant la modélisation et la simulation des champs spatiaux dynamiques et 3D par le développement d'une structure de données spatiale 3D cinétique. Selon notre revue de littérature, la tetraèdrisation Delaunay dynamique 3D (DT) et sa structure duale, le diagramme Voronoi 3D (VD), ont un potentiel intéressant pour manipuler la nature tridimensionnelle et dynamique de ce genre de phénomène. Cependant, en raison de l'échantillonnage particulier des données utilisées dans les applications en géosciences, la tetraèdrisation Delaunay de telles données est souvent inadéquate pour l'intégration et la simulation numériques de champs dynamiques. Par exemple, dans une simulation hydrogéologique, les données sont réparties irrégulièrement i.e. verticalement denses et horizontalement clairsemées, ce qui peut résulter en une tessellation inadéquate dont les éléments seront soit très grands, soit très petits, soit très minces. La taille et la forme des éléments formant la tessellation ont un impact important sur l'exactitude des résultats de la simulation, ainsi que sur les coûts de calcul qui y sont reliés. Par conséquent, la première étape de notre travail de recherche est consacrée au développement d’une méthode de raffinement adaptative basée sur la structure de données Delaunay dynamique 3D et à la construction d’une tessellation 3D adaptative pour la représentation et la simulation de champs dynamiques. Cette tessellation s’ajuste à la complexité des champs, en considérant les discontinuités et les critères de forme et de taille.
Afin de traiter le comportement dynamique des champs 3D dynamiques dans SIG, nous étendons dans la deuxième étape de cette recherche le VD 3D dynamique au VD 3D cinématique pour pouvoir mettre à jour en temps réel la tessellation 3D lors des procédés de simulation dynamique. Puis, nous montrons comment une telle structure de données spatiale peut soutenir les éléments en mouvement à l’intérieur de la tessellation ainsi que leurs interactions. La structure de données cinétique proposée dans cette recherche permet de gérer de manière élégante les changements de connectivité entre les éléments en mouvement dans la tessellation. En outre, les problèmes résultant de l'utilisation d’intervalles de temps fixes, tels que les dépassements et les collisions non détectées, sont abordés en fournissant des mécanismes très flexibles permettant de détecter et contrôler différents changements (événements) dans la tessellation Delaunay 3D.
Enfin, nous étudions le potentiel de la structure de données spatiale cinétique 3D pour la simulation de champs dynamiques dans l'espace tridimensionnel. À cette fin, nous décrivons en détail les différentes étapes menant à l'adaptation de cette structure de données, de sa discrétisation pour des champs 3D continus à son intégration numérique basée sur une méthode événementielle. Nous démontrons également comment la tessellation se déplace et comment la topologie, la connectivité, et les paramètres physiques des cellules de la tessellation sont localement mis à jour suite à un événement topologique survenant dans la tessellation. Trois études de cas sont présentées dans la thèse pour la validation de la structure de données spatiale proposée, et de son potentiel pour la simulation de champs spatiaux 3D et dynamiques. Selon nos observations, pendant le procédé de simulation, la structure de données est préservée et l'information 3D spatiale est gérée adéquatement. En outre, les résultats calculés à partir des expérimentations sont très satisfaisants et sont comparables aux résultats obtenus à partir d'autres méthodes existantes, pour la simulation des mêmes champs dynamiques. En conclusion, certaines des limites de l'approche proposée liées au développement de la structure de données 3D cinétique et à son adaptation pour la représentation et la simulation d'un champ spatial 3D et dynamique sont discutées, et quelques solutions sont suggérées pour l'amélioration de l'approche proposée.Geographic information systems (GIS) are widely used for representation, management and analysis of spatial data in many disciplines including geosciences, agriculture, forestry, metrology and oceanography etc. In particular, geoscientists have increasingly used these tools for data integration and management purposes in many environmental applications ranging from water resources management to global warming study. Beyond these capabilities, geoscientists need to model and simulate 3D dynamic spatial fields and readily integrate those results with other relevant spatial information in order to have a better understating of the environment. However, GIS are very limited for modeling and simulation of spatial fields which are mostly three dimensional and dynamic. These limitations are mainly related to the existing GIS spatial data structures which are 2D and static and are not designed to address the 3D and dynamic aspects of continuous fields. Hence, the main objective of this research work is to improve the current GIS capabilities for modeling and simulation of 3D spatial dynamic fields by development of a 3D kinetic data structure. Based on our literature review, 3D dynamic Delaunay tetrahedralization (DT) and its dual, 3D Voronoi diagram (VD), have many interesting potentials for handling the 3D and dynamic nature of those kind of phenomena. However, because of the special configurations of datasets in geosciences applications, the DT of such data is often inadequate for numerical integration and simulation of dynamic field. For example, in a hydrogeological simulation, the data form highly irregular set of points aligned in vertical direction and very sparse horizontally which may result in very large, small or thin tessellation elements. The size and shape of tessellation elements have an important impact on the accuracy of the results of the simulation of a field as well as the related computational costs. Therefore, in the first step of the research work, we develop an adaptive refinement method based on 3D dynamic Delaunay data structure, and construct a 3D adaptive tessellation for the representation and simulation of a dynamic field. This tessellation is conformed to represent the complexity of fields, considering the discontinuities and the shape and size criteria. In order to deal with the dynamic behavior of 3D spatial fields in a moving framework within GIS, in the second step, we extend 3D dynamic VD to 3D kinetic VD in the sense of being capable of keeping update the 3D spatial tessellation during a dynamic simulation process. Then, we show how such a spatial data structure can support moving elements within the tessellation and their interactions. The proposed kinetic data structure provides an elegant way for the management of the connectivity changes between moving elements within the tessellation. In addition, the problems resulting from using a fixed time step, such as overshoots and undetected collisions, are addressed by providing very flexible mechanisms to detect and manage different changes (events) in the spatial tessellation by 3D DT. Finally, we study the potentials of the kinetic 3D spatial data structure for the simulation of a dynamic field in 3D space. For this purpose, we describe in detail different steps for the adaption of this data structure from its discretization for a 3D continuous field to its numerical integration based on an event driven method, and show how the tessellation moves and the topology, connectivity, and physical parameters of the tessellation cells are locally updated following any event in the tessellation. For the validation of the proposed spatial data structure itself and its potentials for the simulation of a dynamic field, three case studies are presented in the thesis. According to our observations during the simulation process, the data structure is maintained and the 3D spatial information is managed adequately. Furthermore, the results obtained from the experimentations are very satisfactory and are comparable with results obtained from other existing methods for the simulation of the same dynamic field. Finally, some of the limitations of the proposed approach related to the development of the 3D kinetic data structure itself and its adaptation for the representation and simulation of a 3D dynamic spatial field are discussed and some solutions are suggested for the improvement of the proposed approach.
2
Russel, Daniel. "Kinetic data structures in practice /." May be available electronically:, 2007. http://proquest.umi.com/login?COPT=REJTPTU1MTUmSU5UPTAmVkVSPTI=&clientId=12498.
3
Yu, Mulin. "Reconstruction et correction de modèles urbains à l'aide de structures de données cinétiques." Thesis, Université Côte d'Azur, 2022. http://www.theses.fr/2022COAZ4077.
Анотація:
Les modèles numériques 3D compacts et précis de bâtiments sont couramment utilisés par les praticiens pour la visualisation d'environnements existants ou imaginaires, les simulations physiques ou la fabrication d'objets urbains. La génération de tels modèles prêts à l'emploi est cependant un problème difficile. Lorsqu'ils sont créés par des designers, les modèles 3D contiennent généralement des erreurs géométriques dont la correction automatique est un défi scientifique. Lorsqu'ils sont créés à partir de mesures de données, généralement des balayages laser ou des images multivues, la précision et la complexité des modèles produits par les algorithmes de reconstruction existants n'atteignent souvent pas les exigences des praticiens. Dans cette thèse, j'aborde ce problème en proposant deux algorithmes : l'un pour réparer les erreurs géométriques contenues dans les formats spécifiques de modèles de bâtiments, et l'autre pour reconstruire des modèles compacts et précis à partir de nuages de points générés à partir d'un balayage laser ou d'images stéréo multivues. Le composant clé de ces algorithmes repose sur une structure de données de partitionnement d'espace capable de décomposer l'espace en cellules polyédriques de manière naturelle et efficace. Cette structure de données permet à la fois de corriger les erreurs géométriques en réassemblant les facettes de modèles 3D chargés de défauts, et de reconstruire des modèles 3D à partir de nuages de points avec une précision et complexité proche de celles générées par les outils interactifs de Conception Assistée par Ordinateur.Ma première contribution est un algorithme pour réparer différents types de modèles urbains. Les travaux antérieurs, qui reposent traditionnellement sur une analyse locale et des heuristiques géométriques sur des maillages, sont généralement conçus sur-mesure pour des formats 3D et des objets urbains spécifiques. Nous proposons une méthode plus générale pour traiter différents types de modèles urbains sans réglage fastidieux des paramètres. L'idée clé repose sur la construction d'une structure de données cinétiques qui décompose l'espace 3D en polyèdres en étendant les facettes du modèle d'entrée imparfait. Une telle structure de données permet de reconstruire toutes les relations entre les facettes de manière efficace et robuste. Une fois construites, les cellules de la partition polyédrique sont regroupées par classes sémantiques pour reconstruire le modèle de sortie corrigé. Je démontre la robustesse et l'efficacité de l'algorithme sur une variété de modèles réels chargés de défauts et montre sa compétitivité par rapport aux techniques traditionnelles de réparation de maillage à partir de données de modélisation des informations du bâtiment (BIM) et de systèmes d'information géographique (SIG). Ma deuxième contribution est un algorithme de reconstruction inspiré de la méthode Kinetic Shape Reconstruction, qui améliore cette dernière de différentes manières. En particulier, je propose une technique pour détecter des primitives planaires à partir de nuages de points 3D non organisés. Partant d'une configuration initiale, la technique affine à la fois les paramètres du plan continu et l'affectation discrète de points d'entrée à ceux-ci en recherchant une haute fidélité, une grande simplicité et une grande complétude. La solution est trouvée par un mécanisme d'exploration guidé par une fonction énergétique à objectifs multiples. Les transitions dans le grand espace des solutions sont gérées par cinq opérateurs géométriques qui créent, suppriment et modifient les primitives. Je démontre son potentiel, non seulement sur des bâtiments, mais sur une variété de scènes, des formes organiques aux objets fabriqués par l'hommeCompact and accurate digital 3D models of buildings are commonly used by practitioners for the visualization of existing or imaginary environments, the physical simulations or the fabrication of urban objects. Generating such ready-to-use models is however a difficult problem. When created by designers, 3D models usually contain geometric errors whose automatic correction is a scientific challenge. When created from data measurements, typically laser scans or multiview images, the accuracy and complexity of the models produced by existing reconstruction algorithms often do not reach the requirements of the practitioners. In this thesis, I address this problem by proposing two algorithms: one for repairing the geometric errors contained in urban-specific formats of 3D models, and one for reconstructing compact and accurate models from input point clouds generated from laser scanning or multiview stereo imagery. The key component of these algorithms relies upon a space-partitioning data structure able to decompose the space into polyhedral cells in a natural and efficient manner. This data structure is used to both correct geometric errors by reassembling the facets of defect-laden 3D models, and reconstruct concise 3D models from point clouds with a quality that approaches those generated by Computer-Aided-Design interactive tools.My first contribution is an algorithm to repair different types of urban models. Prior work, which traditionally relies on local analysis and heuristic-based geometric operations on mesh data structures, is typically tailored-made for specific 3D formats and urban objects. We propose a more general method to process different types of urban models without tedious parameter tuning. The key idea lies on the construction of a kinetic data structure that decomposes the 3D space into polyhedra by extending the facets of the imperfect input model. Such a data structure allows us to re-build all the relations between the facets in an efficient and robust manner. Once built, the cells of the polyhedral partition are regrouped by semantic classes to reconstruct the corrected output model. I demonstrate the robustness and efficiency of the algorithm on a variety of real-world defect-laden models and show its competitiveness with respect to traditional mesh repairing techniques from both Building Information Modeling (BIM) and Geographic Information Systems (GIS) data.My second contribution is a reconstruction algorithm inspired by the Kinetic Shape Reconstruction method, that improves the later in different ways. In particular, I propose a data fitting technique for detecting planar primitives from unorganized 3D point clouds. Departing from an initial configuration, the technique refines both the continuous plane parameters and the discrete assignment of input points to them by seeking high fidelity, high simplicity and high completeness. The solution is found by an exploration mechanism guided by a multi-objective energy function. The transitions within the large solution space are handled by five geometric operators that create, remove and modify primitives. I demonstrate its potential, not on buildings only, but on a variety of scenes, from organic shapes to man-made objects
4
Ogaja, Clement Surveying & Spatial Information Systems Faculty of Engineering UNSW. "A framework in support of structural monitoring by real time kinematic GPS and multisensor data." Awarded by:University of New South Wales. School of Surveying and Spatial Information Systems, 2002. http://handle.unsw.edu.au/1959.4/18662.
Анотація:
Due to structural damages from earthquakes and strong winds, engineers and scientists have focused on performance based design methods and sensors directly measuring relative displacements. Among the monitoring methods being considered include those using Global Positioning System (GPS) technology. However, as the technical feasibility of using GPS for recording relative displacements has been (and is still being) proven, the challenge for users is to determine how to make use of the relative displacements being recorded. This thesis proposes a mathematical framework that supports the use of RTK-GPS and multisensor data for structural monitoring. Its main contributions are as follows: (a) Most of the emerging GPS-based structural monitoring systems consist of GPS receiver arrays (dozens or hundreds deployed on a structure), and the issue of integrity of the GPS data generated must be addressed for such systems. Based on this recognition, a methodology for integrity monitoring using a data redundancy approach has been proposed and tested for a multi-antenna measurement environment. The benefit of this approach is that it verifies the reliability of both the measuring instruments and the processed data contrary to the existing methods that only verifies the reliability of the processed data. (b) For real-time structural monitoring applications, high frequency data ought to be generated. A methodology that can extract, in real-time, deformation parameters from high frequency RTK measurements is proposed. The methodology is tested and shown to be effective for determining the amplitude and frequency of structural dynamics. Thus, it is suitable for the dynamic monitoring of towers, tall buildings and long span suspension bridges. (c) In the overall effort of deformation analysis, large quantities of observations are required, both of causative phenomena (e.g., wind velocity, temperature, pressure), and of response effects (e.g., accelerations, coordinate displacements, tilt, strain, etc.). One of the problems to be circumvented is that of dealing with excess data generated both due to process automation and the large number of instruments employed. This research proposes a methodology based on multivariate statistical process control whose benefit is that excess data generated on-line is reduced, while maintaining a timely response analysis of the GPS data (since they can give direct coordinate results). Based on the above contributions, a demonstrator software system was designed and implemented for the Windows operating system. Tests of the system with datasets from UNSW experiments, the Calgary Tower monitoring experiment in Canada, the Xiamen Bank Building monitoring experiment in China, and the Republic Plaza Building monitoring experiment in Singapore, have shown good results.
5
Steinmetz, Fabian. "Integration of data quality, kinetics and mechanistic modelling into toxicological assessment of cosmetic ingredients." Thesis, Liverpool John Moores University, 2016. http://researchonline.ljmu.ac.uk/4522/.
Анотація:
In our modern society we are exposed to many natural and synthetic chemicals. The assessment of chemicals with regard to human safety is difficult but nevertheless of high importance. Beside clinical studies, which are restricted to potential pharmaceuticals only, most toxicity data relevant for regulatory decision-making are based on in vivo data. Due to the ban on animal testing of cosmetic ingredients in the European Union, alternative approaches, such as in vitro and in silico tests, have become more prevalent. In this thesis existing non-testing approaches (i.e. studies without additional experiments) have been extended, e.g. QSAR models, and new non-testing approaches, e.g. in vitro data supported structural alert systems, have been created. The main aspect of the thesis depends on the determination of data quality, improving modelling performance and supporting Adverse Outcome Pathways (AOPs) with definitions of structural alerts and physico-chemical properties. Furthermore, there was a clear focus on the transparency of models, i.e. approaches using algorithmic feature selection, machine learning etc. have been avoided. Furthermore structural alert systems have been written in an understandable and transparent manner. Beside the methodological aspects of this work, cosmetically relevant examples of models have been chosen, e.g. skin penetration and hepatic steatosis. Interpretations of models, as well as the possibility of adjustments and extensions, have been discussed thoroughly. As models usually do not depict reality flawlessly, consensus approaches of various non-testing approaches and in vitro tests should be used to support decision-making in the regulatory context. For example within read-across, it is feasible to use supporting information from QSAR models, docking, in vitro tests etc. By applying a variety of models, results should lead to conclusions being more usable/acceptable within toxicology. Within this thesis (and associated publications) novel methodologies on how to assess and employ statistical data quality and how to screen for potential liver toxicants have been described. Furthermore computational tools, such as models for skin permeability and dermal absorption, have been created.
6
Bauchet, Jean-Philippe. "Structures de données cinétiques pour la modélisation géométrique d’environnements urbains." Thesis, Université Côte d'Azur (ComUE), 2019. http://www.theses.fr/2019AZUR4091.
Анотація:
La modélisation géométrique d'objets urbains à partir de mesures physiques et leur représentation de manière efficace, compacte et précise est un problème difficile en vision par ordinateur et en infographie. Dans la littérature scientifique, les structures de données géométriques à l'interface entre les mesures physiques en entrée et les modèles produits en sortie passent rarement à l'échelle et ne permettent pas de partitionner des domaines fermés 2D et 3D représentant des scènes complexes. Dans cette thèse, on étudie une nouvelle famille de structures de données géométrique qui repose sur une formulation cinétique. Plus précisément, on réalise une partition de domaines fermés en détectant et en propageant au cours du temps des formes géométriques telles que des segments de droites ou des plans, jusqu'à collision et création de cellules polygonales. On propose en particulier deux méthodes de modélisation géométrique, une pour la vectorisation de régions d'intérêt dans des images, et une autre pour la reconstruction d'objets en maillages polygonaux concis à partir de nuages de points 3D. Les deux approches exploitent les structures de données cinétiques pour décomposer efficacement en cellules soit un domaine image en 2D, soit un domaine fermé en 3D. Les objets sont ensuite extraits de la partition à l’aide d’une procédure d’étiquetage binaire des cellules. Les expériences menées sur une grande variété de données en termes de nature, contenus, complexité, taille et caractéristiques d'acquisition démontrent la polyvalence de ces deux méthodes. On montre en particulier leur potentiel applicatif sur le problème de modélisation urbaine à grande échelle à partir de données aériennes et satellitairesThe geometric modeling of urban objects from physical measurements, and their representation in an accurate, compact and efficient way, is an enduring problem in computer vision and computer graphics. In the literature, the geometric data structures at the interface between physical measurements and output models typically suffer from scalability issues, and fail to partition 2D and 3D bounding domains of complex scenes. In this thesis, we propose a new family of geometric data structures that rely on kinetic frameworks. More precisely, we compute partitions of bounding domains by detecting geometric shapes such as line-segments and planes, and extending these shapes until they collide with each other. This process results in light partitions, containing a low number of polygonal cells. We propose two geometric modeling pipelines, one for the vectorization of regions of interest in images, another for the reconstruction of concise polygonal meshes from point clouds. Both approaches exploit kinetic data structures to decompose efficiently either a 2D image domain or a 3D bounding domain into cells. Then, we extract objects from the partitions by optimizing a binary labelling of cells. Conducted on a wide range of data in terms of contents, complexity, sizes and acquisition characteristics, our experiments demonstrate the scalability and the versatility of our methods. We show the applicative potential of our method by applying our kinetic formulation to the problem of urban modeling from remote sensing data
7
Rahmati, Zahed. "Simple, Faster Kinetic Data Structures." Thesis, 2014. http://hdl.handle.net/1828/5627.
Анотація:
Proximity problems and point set embeddability problems are fundamental and well-studied in computational geometry and graph drawing. Examples of such problems that are of particular interest to us in this dissertation include: finding the closest pair among a set P of points, finding the k-nearest neighbors to each point p in P, answering reverse k-nearest neighbor queries, computing the Yao graph, the Semi-Yao graph and the Euclidean minimum spanning tree of P, and mapping the vertices of a planar graph to a set P of points without inducing edge crossings.
In this dissertation, we consider so-called kinetic version of these problems, that is, the points are allowed to move continuously along known trajectories, which are subject to change. We design a set of data structures and a mechanism to efficiently update the data structures. These updates occur at critical, discrete times. Also, a query may arrive at any time. We want to answer queries quickly without solving problems from scratch, so we maintain solutions continuously. We present new techniques for giving kinetic solutions with better performance for some these problems, and we provide the first kinetic results for others. In particular, we provide:
• A simple kinetic data structure (KDS) to maintain all the nearest neighbors and the closest pair. Our deterministic kinetic approach for maintenance of all the nearest neighbors improves the previous randomized kinetic algorithm.
• An exact KDS for maintenance of the Euclidean minimum spanning tree, which improves the previous KDS.
• The first KDS's for maintenance of the Yao graph and the Semi-Yao graph.
• The first KDS to consider maintaining plane graphs on moving points.
• The first KDS for maintenance of all the k-nearest neighbors, for any k ≥ 1.
• The first KDS to answer the reverse k-nearest neighbor queries, for any k ≥ 1 in any fixed dimension, on a set of moving points.Graduate
8
Τσιμά, Αλεξάνδρα. "Εφαρμογή των κινητικών δομών δεδομένων σε προβλήματα της υπολογιστικής γεωμετρίας". Thesis, 2006. http://nemertes.lis.upatras.gr/jspui/handle/10889/890.
Анотація:
Οι κινητικές δομές δεδομένων KDSs (kinetic data structures) είναι ένα νέο
πλαίσιο εργασίας για το σχεδιασμό και την ανάλυση αλγορίθμων σχετικών με γεωμε-
τρικά αντικείμενα (ευθύγραμμα τμήματα, πολύγωνα, δίσκοι κ.τ.λ.) σε κίνηση. Σκο-
πός μας είναι να διατηρήσουμε ένα χαρακτηριστικό ενός συνόλου κινούμενων αντι-
κειμένων, π.χ. την κυρτή θήκη ή το κοντινότερο ζευγάρι του. Η διατήρηση του χαρα
κτηριστικού γίνεται μέσω ενός συνόλου συνθηκών που εγγυώνται την εγκυρότητα
της δομής κάθε χρονική στιγμή και το οποίο μεταβάλλεται με το χρόνο λόγω της κίνησης. Οι συνθήκες αποθηκεύονται σε μια ουρά διατεταγμένες χρονολογικά. Κάθε
φορά που αλλάζει το χαρακτηριστικό που μας ενδιαφέρει ενημερώνουμε τη δομή μας
και την ουρά.
Η πρώτη ενότητα της εργασίας είναι μια εισαγωγή στις KDSs. Αναφέρουμε
βασικές έννοιες και ιδέες των KDSs όπως: συνάρτηση διαμόρφωσης, πιστοποιητικά,
κρίσιμα γεγονότα. Επίσης, ασχολούμαστε και με τα μέτρα απόδοσής τους.
Στη δεύτερη ενότητα ασχολούμαστε με τους δυαδικούς διαχωρισμούς χώρου
BSPs, πρώτα σε στατικό και κατόπιν σε κινητικό περιβάλλον. Συγκεκριμένα παρουσιάζουμε τρεις αλγορίθμους για τη διατήρηση του BSP ενός συνόλου κινούμενων
ευθυγράμμων τμημάτων στο επίπεδο. Σύμφωνα με τον πρώτο γνωστό αλγόριθμο που
διατυπώθηκε για την αποτελεσματική διατήρηση του BSP για ένα σύνολο μη-τεμνόμενων ευθυγράμμων τμημάτων S στο επίπεδο χρησιμοποιώντας τη φιλοσοφία
των KDSs, κατασκευάζουμε έναν BSP για το S θεωρώντας τα ευθύγραμμα τμήματα
στάσιμα και στη συνέχεια τον διατηρούμε καθώς αυτά κινούνται. Ο δεύτερος αλγόριθμος είναι ουσιαστικά μια επέκταση του πρώτου καθώς ασχολείται με το ίδιο πρόβλημα, αλλά για τεμνόμενα ευθύγραμμα τμήματα. Αλλάζει το σύνολο των πιστοποιητικών και οι τρόποι με τους οποίους μπορεί να αλλάξει η δομή του BSP. Ο τρίτος αλγόριθμος χρησιμοποιεί ένα διαφορετικό τρόπο για την κατασκευή και διατήρηση του BSP για το σύνολο S βελτιώνοντας τον αρχικό.
Στην τρίτη ενότητα ασχολούμαστε με τη διατήρηση του Voronoi διαγράμματος (VD) για ένα σύνολο κινούμενων, πιθανώς τεμνόμενων δίσκων στο επίπεδο και
του συμπαγούς Voronoi διαγράμματος για ένα σύνολο μη-τεμνόμενων κυρτών πολυγώνων στο επίπεδο (το συμπαγές VD είναι δυϊκό του VD, αλλά το μέγεθός του είναι
συνάρτηση του αριθμού των πολυγώνων και όχι του αριθμού των κορυφών). Και στις
δύο περιπτώσεις, η επίλυση του προβλήματος ανάγεται στη διατήρηση του δυϊκού
του VD, της τριγωνοποίησης Delaunay DT . Η διατήρηση της DT βασίζεται στο
γεγονός ότι ένα σύνολο τοπικών συνθηκών (έλεγχοι InCircle), πιστοποιούν την ολική
ορθότητα της δομής και τοπικές επιδιορθώσεις είναι πάντα εφικτές. Έτσι, καθώς τα
αντικείμενα κινούνται, έχουμε κάθε στιγμή μια έγκυρη DT και συνεπώς ένα έγκυρο VD.
Τέλος, αναφέρουμε μια KDS για τον εντοπισμό συγκρούσεων μεταξύ δύο απλών πολυγώνων σε κίνηση. Ο αλγόριθμος διατηρεί μια υποδιαίρεση του ελεύθερου χώρου μεταξύ των πολυγώνων, που καλείται external relative geodesic triangulation, η οποία πιστοποιεί τη μη-σύγκρουσή των πολυγώνων.Kinetic Data Structures (KDSs) are a new framework for designing and analyzing algorithms for geometrics objects (segments, polygons, disks etc.) in motion. Our goal is to maintain an attribute of a set of moving objects, for example the convex hull or the closest pair. The maintenance of the attribute is made through a set of conditions that guarantee the validity of the structure every moment. This set is changed with time due to the motion. The conditions are stored in a queue ordered chronologically. Every time the attribute is changed, we update the structure and the queue. The first chapter is an introduction to the KDSs. We mention basic notions and ideas of the KDSs, like: configuration function, certificates, critical events. Furthermore, we discuss their measure of performance. In the second chapter we deal with the Binary Space Partitions (BSPs), first in static and then in kinetic environment. Specifically, we present three algorithms for the maintenance of a BSP for a set of moving segments in the plane. According to the first known algorithm which was proposed for efficiently maintaining the BSP for a set of non-intersecting segments S in the plane using the philosophy of KDSs, we construct a BSP - considering that the segments are static - and then we maintain it as the segments move. The second algorithm is substantially an expansion of the first algorithm as it deals with the same problem, but for intersecting segments. The set of the certificates is changed as well as the set of critical events. The third algorithm uses a different technique for the construction and maintenance of the BSP for the set S. It is an improvement of the first algorithm. In the third chapter, we deal with the maintenance of the Voronoi diagram (VD) for a set of moving, probably intersecting disks in the plane and the maintenance of a compact Voronoi-like diagram for a set of non-intersecting, convex polygons in the plane (compact VD is dual to VD, except that its size is a function of the number of polygons and not of the number of vertices). In both cases, we solve the problem by maintaining the dual graph of VD, the Delaunay triangulation (DT ). The maintenance of the DT is based in the fact that a set of local conditions (InCircle tests) guarantee the total correctness of the structure and we are able to do only local changes. So, as the objects move, we have a valid DT every moment and consequently a valid VD. Finally, we mention a KDS for detecting collisions between two simple polygons in motion. In order to do so, we create a planar subdivision of the free space between the polygons, called External Relative Geodesic Triangulation, which certify their disjointness.
9
Ogaja, Clement. "A framework in support of structural monitoring by real time kinematic GPS and multisensor data /." 2002. http://www.library.unsw.edu.au/~thesis/adt-NUN/public/adt-NUN20020925.144123/index.html.
10
Bai, Chao-Ying. "Three dimensional seismic kinematic inversion with application to reconstruction of the velocity structure of Rabaul volcano / by Chao-ying Bai." 2004. http://hdl.handle.net/2440/22132.
Анотація:
"July 2004"Bibliography: leaves 215-230.
viii, 230 leaves : ill., maps ; 30 cm.
Title page, contents and abstract only. The complete thesis in print form is available from the University Library.
Thesis (Ph.D.)--University of Adelaide, School of Chemistry and Physics, Discipline of Physics, 2004
Книги з теми "Kinetic data structure":
1
Leonovich, Sergey, Evgeniy Shalyy, Elena Polonina, Elena Sadovskaya, Lev Kim, and Valentin Dorkin. Durability of port reinforced concrete structures (Far East and Sakhalin). ru: INFRA-M Academic Publishing LLC., 2021. http://dx.doi.org/10.12737/1816638.
Анотація:
Section I of the monograph is devoted to an urgent problem - forecasting the durability of port reinforced concrete structures, the destruction of which is associated with corrosion of steel reinforcement caused by chloride aggression and carbonation of concrete. The analysis of models for calculating the service life of structures and experimental data is carried out, the life cycles for the main degradation processes in concrete and reinforcement, the periods of initiation and propagation of corrosion are considered, the influence of environmental factors (temperature, humidity) and the quality of concrete (In/C, cement consumption, diffusion coefficient) on the kinetics of chloride penetration and the movement of the carbonation front is taken into account. Probabilistic models of basic variables are considered, the limiting states of port reinforced concrete structures for the durability of reinforced concrete structures based on the reliability coefficient for service life are formulated.
Sections II and III describe modern methods of restoration and restoration of reinforced concrete port structures subjected to corrosion destruction using nanofibrobeton. The concept of multilevel reinforcement has been implemented. Methods of experimental fracture mechanics were used to evaluate the joint work of exploited concrete and reinforcement nanofibre concrete.
It is intended for scientific and engineering staff of universities, research and design organizations.
2
Molecular modeling in heavy hydrocarbon conversions. Boca Raton: Taylor and Francis, 2005.
3
Frey, Perry A., and Adrian D. Hegeman. Enzymatic Reaction Mechanisms. Oxford University Press, 2007. http://dx.doi.org/10.1093/oso/9780195122589.001.0001.
Анотація:
Books dealing with the mechanisms of enzymatic reactions were written a generation ago. They included volumes entitled Bioorganic Mechanisms, I and II by T.C. Bruice and S.J. Benkovic, published in 1965, the volume entitled Catalysis in Chemistry and Enzymology by W.P. Jencks in 1969, and the volume entitled Enzymatic Reaction Mechanisms by C.T. Walsh in 1979. The Walsh book was based on the course taught by W.P. Jencks and R.H. Abeles at Brandeis University in the 1960's and 1970's. By the late 1970's, much more could be included about the structures of enzymes and the kinetics and mechanisms of enzymatic reactions themselves, and less emphasis was placed on chemical models. Walshs book was widely used in courses on enzymatic mechanisms for many years. Much has happened in the field of mechanistic enzymology in the past 15 to 20 years. Walshs book is both out-of-date and out-of-focus in todays world of enzymatic mechanisms. There is no longer a single volume or a small collection of volumes to which students can be directed to obtain a clear understanding of the state of knowledge regarding the chemicals mechanisms by which enzymes catalyze biological reactions. There is no single volume to which medicinal chemists and biotechnologists can refer on the subject of enzymatic mechanisms. Practitioners in the field have recognized a need for a new book on enzymatic mechanisms for more than ten years, and several, including Walsh, have considered undertaking to modernize Walshs book. However, these good intentions have been abandoned for one reason or another. The great size of the knowledge base in mechanistic enzymology has been a deterrent. It seems too large a subject for a single author, and it is difficult for several authors to coordinate their work to mutual satisfaction. This text by Perry A. Frey and Adrian D. Hegeman accomplishes this feat, producing the long-awaited replacement for Walshs classic text.
Частини книг з теми "Kinetic data structure":
1
Speckmann, Bettina. "Kinetic Data Structures." In Encyclopedia of Algorithms, 1046–48. New York, NY: Springer New York, 2016. http://dx.doi.org/10.1007/978-1-4939-2864-4_191.
2
Speckmann, Bettina. "Kinetic Data Structures." In Encyclopedia of Algorithms, 417–19. Boston, MA: Springer US, 2008. http://dx.doi.org/10.1007/978-0-387-30162-4_191.
3
Chen, Qing, Anders Engström, Lars Höglund, Henrik Strandlund, and Bo Sundman. "Thermo-Calc Program Interface and Their Applications - Direct Insertion of Thermodynamic and Kinetic Data into Modelling of Materials Processing, Structure and Property." In Materials Science Forum, 3145–48. Stafa: Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-960-1.3145.
4
Weller, René. "Kinetic Data Structures for Collision Detection." In Springer Series on Touch and Haptic Systems, 49–89. Heidelberg: Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-01020-5_3.
5
Abam, Mohammad Ali, Pankaj K. Agarwal, Mark de Berg, and Hai Yu. "Out-of-Order Event Processing in Kinetic Data Structures." In Lecture Notes in Computer Science, 624–35. Berlin, Heidelberg: Springer Berlin Heidelberg, 2006. http://dx.doi.org/10.1007/11841036_56.
6
Alexandron, Giora, Haim Kaplan, and Micha Sharir. "Kinetic and Dynamic Data Structures for Convex Hulls and Upper Envelopes." In Lecture Notes in Computer Science, 269–81. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/11534273_24.
7
STEIMER, C., H. DIEKER, D. WAMWANGI, W. WELNIC, R. DETEMPLE, and M. WUTTIG. "OPTICAL AND ELECTRONIC DATA STORAGE WITH PHASE CHANGE MATERIALS: FROM CRYSTAL STRUCTURES TO KINETICS." In Functional Properties of Nanostructured Materials, 449–54. Dordrecht: Springer Netherlands, 2006. http://dx.doi.org/10.1007/1-4020-4594-8_42.
8
Osadchy, S., V. Zozulya, and A. Timoshenko. "The Dynamic Characteristics of a Manipulator with Parallel Kinematic Structure Based on Experimental Data." In Advances in Intelligent Robotics and Collaborative Automation, 27–48. New York: River Publishers, 2022. http://dx.doi.org/10.1201/9781003337119-2.
9
Ranzi, Gianluca, Graziano Leoni, Raymond Ian Gilbert, Luigino Dezi, and Riccardo Zandonini. "State-of-the-art review on the time-dependent behaviour of composite steel-concrete beams." In Time-dependent behaviour and design of composite steel-concrete structures, 61–82. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2021. http://dx.doi.org/10.2749/sed018.ch4.
Анотація:
<p>This chapter provides an overview of the work carried out to date on the long-term behaviour of composite steel-concrete beams. In the first part of the chapter, a description of the components forming a composite member is presented. This is followed by an outline of the main kinematic concepts, such as full and partial shear interaction, that influence the structural response of this form of construction due to the flexibility of the shear connection provided between the concrete and steel components. The review of the work performed on the time-dependent behaviour of concrete and its influence on the long-term structural response of composite beams for building and bridge applications is then presented. The modelling and experimental work considered in the review highlights the importance of considering concrete time effects, when predicting the in-service response of composite beams.</p>
10
Chen, Linlin, Lev Klebanov, Anthony Almudevar, Christoph Proschel, and Andrei Yakovlev. "A Study of the Correlation Structure of Microarray Gene Expression Data Based on Mechanistic Modeling of Cell Population Kinetics." In Statistical Modeling for Biological Systems, 47–61. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-34675-1_3.
Тези доповідей конференцій з теми "Kinetic data structure":
1
Badashian, Ali Sajedi, and Mohammad Reza Razzazi. "Kinetic Convex Hull Algorithm Using Spiral Kinetic Data Structure." In 2007 International Conference on Computational Science and its Applications (ICCSA 2007). IEEE, 2007. http://dx.doi.org/10.1109/iccsa.2007.72.
2
Mostafavi, Mir Abolfazl, Leila Hashemi Beni, and Marina Gavrilova. "3D Dynamic Scene Surveillance and Management Using a 3D Kinetic Spatial Data Structure." In Web Services. IEEE, 2009. http://dx.doi.org/10.1109/geows.2009.15.
3
Kumahata, Kiyoshi, Masahiro Watanabe, and Teruo Matsuzawa. "Fluid-Structure Interaction Simulation for Blood Vessel Using 3D Voxel Data Derived From Medical Image." In ASME/JSME 2007 5th Joint Fluids Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/fedsm2007-37576.
Анотація:
We have used the voxel-based method to examine the Fluid-Structure Interaction (FSI) of blood flow and blood vessel wall. This method uses the voxel data that are Cartesian structured grid from medical image. We have confirmed the accuracy and reliability of this method for blood vessel. In this paper, we introduce backgrounds, kinetic models of blood vessel, a numerical method, and a result of experiment.
4
Soranna, Francesco, Yi-Chih Chow, Oguz Uzol, and Joseph Katz. "Structure of Turbulence Within a Sheared Wake of a Rotor Blade." In ASME 2006 2nd Joint U.S.-European Fluids Engineering Summer Meeting Collocated With the 14th International Conference on Nuclear Engineering. ASMEDC, 2006. http://dx.doi.org/10.1115/fedsm2006-98401.
Анотація:
Stereoscopic PIV measurements examine the flow structure and turbulence within a rotor near wake located within a non-uniform field generated by a row of Inlet Guide Vanes (IGVs). The experiments are performed in a refractive index matched facility that provides unobstructed view of the entire flow field. The data are acquired at 10 closely spaced radial planes located near mid-span, enabling measurements of all the components of the phase averaged velocity and strain rate, as well as the Reynolds stress and the triple correlation tensors. The rotor wake is sheared and bent towards the pressure (inner) side by a non-uniform flow field generated by IGV wake segments that propagate along the suction and pressure sides of the rotor passage with different speeds. The axial velocity fluctuations increase along the suction/outer side of the wake, while the other components decay. On the pressure/inner part of the bent wake the circumferential velocity fluctuations are higher. The Reynolds shear stress has a complex distribution, but is higher on the suction side. The turbulent kinetic energy is also consistently higher on the outer (suction) side of the wake. This trend is fundamentally different from those observed in prior studies of curved wakes where turbulence is enhanced on the inner side of the wake due to the destabilizing effect of curvature. To explain the difference, we examine the contributors to turbulent kinetic energy production rate in a curvilinear coordinate system aligned with the wake-centerline. The contribution of streamwise curvature to the production rate of turbulent kinetic energy, although consistent with expected trends, is overwhelmed by effects of wake shearing. The primary contributor to turbulent kinetic energy production rate is the product of Reynolds shear stress with cross-stream gradients of streamwise (in a frame of reference relative to the rotor blade) velocity in the wake. The location of peak in turbulent kinetic energy is almost aligned with that of production rate. The turbulence diffusion term opposes the production rate peaks, but also has high values along the edge of the wake.
5
Kudryavtsev, Alexey, Anton Shershnev, and Mikhail Ivanov. "Numerical Simulation of Gas Microflows by Solving Relaxation-Type Kinetic Equations." In ASME 2009 Second International Conference on Micro/Nanoscale Heat and Mass Transfer. ASMEDC, 2009. http://dx.doi.org/10.1115/mnhmt2009-18520.
Анотація:
In this paper we present a numerical method for simulation of gas flows at micro- and nanoscales based on solving of relaxation-type kinetic equations with the the discrete ordinate method and a high-order shock-capturing scheme. The method is used for simulation of such classical problems as the shock-wave structure and the supersonic flow over a flat plate as well as for investigtion of shock wave propagation in a microchannel. The results obtained are compared with Navier-Stokes and DSMC solutions and experimental data.
6
Basch, Julien, João Comba, Leonidas J. Guibas, John Hershberger, Craig D. Silverstein, and Li Zhang. "Kinetic data structures." In the fifteenth annual symposium. New York, New York, USA: ACM Press, 1999. http://dx.doi.org/10.1145/304893.305004.
7
Nigmatullin, Raoul R. "The “Fractional” Kinetic Equations and General Theory of Dielectric Relaxation." In ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/detc2005-84647.
Анотація:
Based on the Mori-Zwanzig formalism it becomes possible to suggest a general decoupling procedure, which reduces a wide set of various micromotions distributed over a self-similar structure to a few collective/reduced motions describing the relaxation/exchange behavior of a complex system in the mesoscale region. The frequency dependence of the reduced collective motion contains real and pair of complex-conjugate power-law exponents in the frequency domain and explains naturally the “universal response” (UR) phenomenon discovered by A. Jonscher in a wide class of heterogeneous materials. This strict mathematical result allows in developing a consistent and general theory of dielectric relaxation that can describe wide set of dielectric spectroscopy (DS) data measured in some frequency/temperature range in many heterogeneous materials. Based on this result it becomes possible also to suggest a new set of two-pole elements, which generalizes the conventional RLC-elements and can constitute the basis of new theory of the linear electric circuits.
8
Kergourlay, Ge´rald, Smai¨ne Kouidri, Gary W. Rankin, and Robert Rey. "3D Structure of the Rotor Wake of a Three Different Sweep Axial Fan." In ASME 2005 Fluids Engineering Division Summer Meeting. ASMEDC, 2005. http://dx.doi.org/10.1115/fedsm2005-77284.
Анотація:
This experimental study, applied to a three different sweep axial fan (backward, radial and forward), aims at determining the 3D structure of the rotor wake from unsteady velocity measurements. The hot-film anemometry is used to measure the 3D unsteady velocity components in nearfield, downstream the fan. The data analysis leading to averaged and turbulent velocities, the components of the Reynolds’ stress tensor and the turbulent kinetic energy is presented, in order to illustrate the influence of the sweep. A spectral analysis is also performed.
9
Soranna, Francesco, Yi-Chih Chow, Oguz Uzol, and Joseph Katz. "Flow Structure and Turbulence in the Tip Region of a Turbomachine Rotor Blade." In ASME Turbo Expo 2007: Power for Land, Sea, and Air. ASMEDC, 2007. http://dx.doi.org/10.1115/gt2007-27590.
Анотація:
The flow structure and turbulence in the tip region of a rotor blade operating downstream of a row of Inlet Guide Vanes (IGVs) are investigated experimentally in a refractive index matched facility that provides unobstructed view of the entire flow field. Stereo-PIV measurements are performed in closely spaced radial planes near the blade tip in a region extending from (slightly upstream of) the blade trailing edge to about 40% of the chord downstream of it. The data enable calculations of all the components of the phase-averaged velocity and vorticity vectors, as well as the strain rate, Reynolds stress, and turbulent diffusion tensors. Each rotor blade is confined between two tip-leakage vortices, a right hand vortex (RHV), generated by the subject blade and propagating along its right hand side, and a left hand vortex (LHV), generated by the previous blade in the same row and propagating along the left hand side of the subject blade. In addition, a trailing edge vortex (TEV) lays underneath the LHV and is subject to intense shearing/deformation by the LHV. RHV-induced radial gradients of radial phase-averaged velocity cause negative turbulence production, P, along the RHV-axis, and formation of a region of low P in the gap between the RHV and the blade suction surface. Trends of turbulent kinetic energy k and P within the RHV do not agree due to the effects of advection by the phase-averaged flow. To the left of the blade, shearing of the TEV by the LHV enhances turbulence production in the region between the two vortices and the rotor wake. Trends of turbulent kinetic energy and its production rate are in good agreement and peaks of k and P occur at the same location. As the TEV migrates away from the LHV, shearing effects become weaker and the dominant contributors to production are terms containing vortex-induced radial gradients of axial and radial velocities. Turbulent diffusion is a minor contributor to the evolution of turbulent kinetic energy in the tip region. It is also shown that the tip-leakage flow/vortex deteriorates the rotor blade performance, causing a ∼66% increase in shaft power input (per unit mass flow-rate) in the tip region in comparison with midspan.
10
Al Shoaibi, Ahmed, and Anthony M. Dean. "Kinetic Analysis of C4 Alkane and Alkene Pyrolysis: Implications for SOFC Operation." In ASME 2008 6th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2008. http://dx.doi.org/10.1115/fuelcell2008-65033.
Анотація:
Pyrolysis experiments of isobutane, isobutylene, and 1-butene were performed over a temperature range of 550–750 °C and a pressure of ∼ 0.8 atm. The residence time was ∼ 5 s. The fuel conversion and product selectivity were analyzed at these temperatures. The pyrolysis experiments were performed to simulate the gas phase chemistry that occurs in the anode channel of a solid-oxide fuel cell. The experimental results confirm that molecular structure has a substantial impact on pyrolysis kinetics. The experimental data show considerable amounts of C5 and higher species (∼2.8 mole % with isobutane at 750 °C, ∼7.5 mole % with isobutylene at 737.5 °C, and ∼7.4 mole % with 1-butene at 700 °C). The C5+ species are likely deposit precursors. The results confirm that hydrocarbon gas phase kinetics have substantial impact on SOFC operation.
Звіти організацій з теми "Kinetic data structure":
1
Görz, Ines, and Peggy HIELSCHER. GIS-based structural analysis on the sphere: an approach for the kinematic interpretation of structural data. Cogeo@oeaw-giscience, September 2011. http://dx.doi.org/10.5242/iamg.2011.0129.
2
LeWinter, Adam, Elias Deeb, Dominic Filiano, and David Finnegan. Continued investigation of thermal and lidar surveys of building infrastructure : Crary Lab and wet utility corridor, McMurdo Station, Antarctica. Engineer Research and Development Center (U.S.), March 2022. http://dx.doi.org/10.21079/11681/43820.
Анотація:
We conducted a combined lidar and thermal infrared survey from both ground-based and Unmanned Aerial System (UAS) platforms at McMurdo Station, Antarctica, in February 2020 to assess the building thermal envelope and infrastructure of the Crary Lab and the wet utility corridor (utilidor). These high-accuracy, coregistered data produced a 3-D model with assigned temperature values for measured surfaces, useful in identifying thermal anomalies and areas for potential improvements and for assessing building and utilidor infrastructure by locating and quantifying areas settlement and structural anomalies. The ground-based survey of the Crary Lab was similar to previous work performed by the team at both Palmer (2015) and South Pole (2017) Stations. The UAS platform focused on approximately 10,500 linear-feet of utilidor throughout McMurdo Station. The datasets of the two survey areas overlapped, allowing us to combine them into a single, georeferenced 3-D model of McMurdo Station. Coincident exterior temperature and atmospheric measurements and Global Navigation Satellite System real-time kinematic surveys provided further insights. Finally, we assessed the thermal envelope of the Crary Lab and the structural features of the utilidor. The resulting dataset is available for analysis and quantification.
3
LOW-CYCLE FATIGUE PROPERTIES OF AUSTENITIC STAINLESS STEEL S30408 UNDER LARGE PLASTIC STRAIN AMPLITUDE. The Hong Kong Institute of Steel Construction, March 2022. http://dx.doi.org/10.18057/ijasc.2022.18.1.10.
Анотація:
The application of stainless steel materials in civil structures for seismic protection lies in its low-cycle fatigue characteristic. However, the data of existing research are mainly based on the low-cycle fatigue in small strain amplitudes. To this end, we perform low-cycle fatigue testing of Austenitic stainless steel S30408, which has low yield point and good elongation performance, under the cyclic load with a maximum strain amplitude reaching up to 5%, to fill the gap. The stress-strain response characteristics of the stainless steel material under the cyclic load are analyzed; then, the parameters of the strain-fatigue life relationship and the cyclic-plastic constitutive model used for FEA simulation are extracted. Results show that the stainless steel’s stress-strain curve is nonlinear without a yield plateau, thus presenting a high strength yield ratio and ductility. The hysteresis loops of the material are plump with a shuttle shape and are symmetric to the origin, indicating a fine energy dissipation capacity. The skeleton curve under cyclic loading with cyclic hardening can be significantly reflected by the Ramberg Osgood model, which is affected by the strain amplitude and loading history; it is also different from the monotonic tensile skeleton curve. The strain-fatigue life curve fitted by the Baqusin Manson Coffin model can predict the materials’ fatigue life under different strain amplitudes. The mixed hardening model, including isotropic and kinematic hardening, based on the Chaboche model, is able to simulate the cyclic stress-strain relationship. Further, its parameters can provide basic data information for the seismic design of civil structures when Austenitic stainless steel S30408 is used.