Academic literature on the topic 'Model multi strate'

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Journal articles on the topic "Model multi strate"

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Broschek, Jörg. "Federalism and Political Change: Canada and Germany in Historical-Institutionalist Perspective." Canadian Journal of Political Science 43, no. 1 (March 2010): 1–24. http://dx.doi.org/10.1017/s0008423909990023.

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Abstract. This paper starts from the assumption that historical institutionalism has much to offer in order to address important questions raised in the literature on comparative federalism. Historical institutionalism is a useful approach to enhancing our understanding of both the origins that drive federal system dynamics and the dynamic patterns which federal systems unfold over time. The paper conceptualizes federalism as a multi-layered political order, comprising an institutional and an ideational layer. It then introduces two models of political change, the model of path dependence and the process sequencing model, and asks how each model can contribute to explain the emergence of the federal order in Canada and Germany. I conclude that while the model of path dependence lends itself well to capturing federal system dynamics in Germany, the process sequencing model, in contrast, is better suited to explaining sources and patterns of change in Canada.Résumé. L'article part de la position que l'institutionnalisme historique constitue une source intéressante pour aborder des questions importantes issues de la littérature sur le fédéralisme comparatif. L'institutionnalisme historique est une approche utile pour élargir notre compréhension des dynamiques politiques dans les systèmes fédéraux. Cet article conceptualise le fédéralisme comme un ordre politique à plusieurs niveaux comportant une strate institutionnelle et une strate idéationnelle. Puis, deux modèles de transformation politique sont introduits : le modèle de la dépendance du sentier et un autre qui trace les diverses séquences d'un changement dont la temporalité est décisive pour les résultats. On analyse ensuite la capacité des deux modèles d'expliquer la formation d'un ordre politique fédéral en Allemagne et au Canada. L'article conclut que le modèle de la dépendance du sentier est utile pour cerner les dynamiques du système fédéral allemand tandis que le modèle des séquences temporelles est meilleur pour expliquer les sources et les transformations du fédéralisme canadien.
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O'Hara, Kevin L., and Narayanan I. Valappil. "Sapwood–leaf area prediction equations for multi-aged ponderosa pine stands in western Montana and central Oregon." Canadian Journal of Forest Research 25, no. 9 (September 1, 1995): 1553–57. http://dx.doi.org/10.1139/x95-169.

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Ponderosa pine (Pinusponderosa Dougl. ex Laws.) frequently grows in pure, multi-aged stands throughout its range. Sapwood–leaf area prediction equations were developed for multi-aged, multi-strata ponderosa pine stands in western Montana and central Oregon. No significant differences were found between equations for trees from lower or upper strata, or between equations for all trees and equations for upper or lower strata trees in either study location. These results indicate overstory ponderosa pine trees do not require significantly greater sapwood conducting tissue per unit of leaf area than understory trees. Single variable models using only sapwood area at breast height are recommended.
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Liu, Chun Yuan, Shi Meng Gu, and Yu Liu. "Construction of 3D Strata Model Based on the Multiple Source Data." Advanced Materials Research 671-674 (March 2013): 27–30. http://dx.doi.org/10.4028/www.scientific.net/amr.671-674.27.

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According to the raw multi-source data, all strata should be standardized. With the aid of the cubic spline interpolation function, the virtual drilling could be created. With the help of Deluanay triangulation, every stratum is turned to triangular net, namely initial stratum surface. A top triangle of stratum is connected with a corresponding bottom triangle of stratum in the net. It makes a triangular prism unit. Finally, according to certain rules, numerous triangular prism units are assembled orderly to form a geologic body. The GTP model can realize 3D strata simulation and the purpose of true three-dimensional.
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Wu, Zhi Ping, Sheng Hua Qiu, and Ying Li. "Numerical Simulation of Inclined Multi-Seam Mining Subsidence of Considered the Impact by Faults." Advanced Materials Research 250-253 (May 2011): 2135–40. http://dx.doi.org/10.4028/www.scientific.net/amr.250-253.2135.

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According to the complex mining geological condition of Shandong gentle inclined multi-seam mining, Use the three-dimensional finite element numerical analysis software to establish three-dimensional geological model under the different mining working conditions. Taking into account the impact of faults to calculate multi-seam roof strata movement and surface subsidence caused by the different mining working conditions. The level displacement & subsidence distribution curve of the reference point of surface & multi-seam roof strata under the different working conditions is shown. The maximum, minimum settlement, differential settlement and subsidence diagram is shown. And the principal stress, shear stress value of surface & multi-seam roof strata after mining also is shown. The results showed that: little change of the biggest surface subsidence and differential settlement is caused by mining 3101&3102 face or separate 3101 or 3102 face. And the largest subsidence, and the settlement difference of the surface is 520mm, 498mm, 515mm and 59mm, 78mm, 81mm, Respectively. It provides an reference for reasonable, safe, economic for the inclined multi-seam mining under similar conditions.
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Qin, Qin, Zu-huai Wu, Yong Zang, Ben Guan, and Jinxin Zhang. "Warping deformation of 316l/q345r stainless composite plate after removal strake." World Journal of Engineering 13, no. 3 (June 13, 2016): 206–9. http://dx.doi.org/10.1108/wje-06-2016-027.

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Purpose This study aims to reduce the warping deformation of the stainless composite plate after removal strake by using a finite element method. A three-dimensional thermo-mechanical coupled elastic-plastic finite element model has been suggested by using ABAQUS to simulate the multi-pass hot rolling of stainless composite plate. Design/methodology/approach A three-dimensional thermo-mechanical coupled elastic-plastic finite element model has been suggested by using ABAQUS to simulate the multi-pass hot rolling of stainless composite plate. Warping deformation rules of 316L/Q345R stainless composite plate after removal strake have been analyzed. Moreover, the influences of some different rolling parameters on this deformation have been discussed. Findings The warping deformation just varies in the range of cladding ratio from 0.1 to 0.25. Therefore, cladding ratio does not have a great influence on warping deformation. Originality/value The results show that higher heating temperature, larger final thickness and less rolling passes are beneficial for reducing the warping deformation.
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SHEN Jiaxin, 申佳鑫, 王伟 WANG Wei, 张军英 ZHANG Junying, 陈海滨 CHEN Haibin, 郭子龙 GUO Zilong, and 张雄星 ZHANG Xiongxing. "光纤布拉格光栅与空芯光纤多模干涉混合型温度应变双参量传感器." ACTA PHOTONICA SINICA 50, no. 5 (2021): 158. http://dx.doi.org/10.3788/gzxb20215005.0506006.

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Zhang, Jie, Bin Wang, Wenyong Bai, and Sen Yang. "A Study on the Mechanism of Dynamic Pressure during the Combinatorial Key Strata Rock Column Instability in Shallow Multi-coal Seams." Advances in Civil Engineering 2021 (March 2, 2021): 1–11. http://dx.doi.org/10.1155/2021/6664487.

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In order to study the pressure changes and support failure in mining face under concentrated coal pillar in shallow coal seam, the concentrated coal pillar in 30105 working face of Nan Liang Coal Mine was selected as the research object. In this study, the mechanism of dynamic mine pressure in mining face under concentrated coal pillar was investigated through multiple simulation experiments, numerical simulations, and theoretical analysis. The results of similar simulation experiment indicate that the dynamic mine pressure occurred at 25 m under the concentrated coal pillar and 7 m beyond the coal pillar. The strata roof was observed with sliding down, resulting in collapse and severe fractures commonly seen in rock column. The overlying strata caused the overall subsidence and collapse synchronously, resulting in the sudden increase of the resistance of the support in the working face, and the dynamic load coefficients reach 3.4 and 3.5. The theoretical analysis indicates that the two hard strata in the overlying strata of 3−1 coal meet the theoretical criterion of the combined key strata with the concentrated coal pillar of 2−2 coal in the weak interlayer of the combined key strata. The combined key strata bear the load of the whole overlying strata. The sliding instability featured with the rock column-type fracture located in the combined key strata is considered as the primary trigger of the abnormal resistance of the support and the dynamic mine pressure in the mining face under the concentrated coal pillar. The dynamic pressure model of “combination key strata—immediate roof-support” was established, along with the dynamic load coefficient calculation related to the rock column-type fracture and instability. The characteristics of dynamic load coefficient of the rock column-type fracture and instability under different overlying rock structure conditions were analyzed, providing references and insights into mining under similar geographic conditions.
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Dodwell, T. J., G. W. Hunt, M. A. Peletier, and C. J. Budd. "Multi-layered folding with voids." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 370, no. 1965 (April 28, 2012): 1740–58. http://dx.doi.org/10.1098/rsta.2011.0340.

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In the deformation of layered materials such as geological strata, or stacks of paper, mechanical properties compete with the geometry of layering. Smooth, rounded corners lead to voids between the layers, while close packing of the layers results in geometrically induced curvature singularities. When voids are penalized by external pressure, the system is forced to trade off these competing effects, leading to sometimes striking periodic patterns. In this paper, we construct a simple model of geometrically nonlinear multi-layered structures under axial loading and pressure confinement, with non-interpenetration conditions separating the layers. Energy minimizers are characterized as solutions of a set of fourth-order nonlinear differential equations with contact-force Lagrange multipliers, or equivalently of a fourth-order free-boundary problem. We numerically investigate the solutions of this free-boundary problem and compare them with the periodic solutions observed experimentally.
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O'Hara, Kevin L., and Cassandra L. Kollenberg. "Stocking Control Procedures for Multiaged Lodgepole Pine Stands in the Northern Rocky Mountains." Western Journal of Applied Forestry 18, no. 1 (January 1, 2003): 15–21. http://dx.doi.org/10.1093/wjaf/18.1.15.

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Abstract Patterns of leaf area distribution in multiaged lodgepole pine stands were used to develop a stocking control model. This model, the Lodgepole Pine–Multi-aged Stocking Control Model (LPP–MASAM), allows the user to design multiaged stand structures for implementation in lodgepole pine stands in the northern Rocky Mountains. The model is suitable for designing stands with two or three age classes, or two canopy strata. These multiaged stands represent a management alternative to even-aged stands where vigorous stands exist and windthrow is not a major constraint. The model requires the user to divide stands into components such as age classes or canopy strata that are the basic unit for growing space allocation. Growing space is represented by leaf area index. Stocking regimes are assessed over a single cutting cycle using projections of volume increment, stand density and tree vigor. Example stocking regimes are provided as are internet links to access the model. West. J. Appl. For. 18(1):15–21.
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Haghani, Sei-Chang Oh Ali. "Testing and evaluation of a multi-commodity multi-modal network flow model for disaster relief management." Journal of Advanced Transportation 31, no. 3 (June 1997): 249–82. http://dx.doi.org/10.1002/atr.5670310304.

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Dissertations / Theses on the topic "Model multi strate"

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Aubry, Lise Myriam. "Influence du recrutement sur les variations des paramètres démographiques avec l'âge et la vitesse de sénescence chez la mouette tridactyle, Rissa tridactyla." Toulouse 3, 2009. http://thesesups.ups-tlse.fr/1581/.

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J'ai utilisé une étude de 30 ans portant sur une espèce d'oiseau marin longévif (la mouette tridactyle) afin d'étudier les compromis évolutifs entre recrutement, reproduction, et survie. Mes résultats indiquent que l'âge à la première reproduction et la sélection de l'habitat sont intimement liés, et que l'âge au recrutement influence également les trajectoires de survie et de reproduction. D'autres sources d'hétérogénéité observée (investissement reproducteur) et non-observée ('frailty') agissent également sur la survie et la reproduction au cours de la vie. Les recrues d'âge intermédiaire (âge = 5) maintiennent un succès reproducteur élevé au cours de la vie et minimisent le déclin des chances de survie avec l'âge par rapport aux autres recrues. Même si les mesures de fitness individuelles indiquent que le recrutement précoce est la plus avantageuse des stratégies, les coûts associés au différé du recrutement semblent minimes
I used a 30-year study of long-lived seabirds (black-legged Kittiwakes) that breed in Brittany to study the evolution of trade-offs between early-life breeding decisions, future reproduction, and survival. I first found that recruitment age and habitat selection were intimately linked. Recruitment age further influenced breeding success and survival trajectories. Furthermore, sources of observed (reproductive covariates, experience) and unobserved heterogeneity (frailty) explained substantial amounts of variability in breeding success and survival. Overall, intermediate age recruits (age 5) seemed to maintain high breeding success over life and minimized senescence in survival compared to other recruits. Even though individual fitness showed that earlier recruitment was the most beneficial recruitment strategy, the costs associated to delayed recruitment seemed minimal
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Sarfo, Amponsah Eric. "Mathematical Modeling of Epidemics: Parametric Heterogeneity and Pathogen Coexistence." Diss., North Dakota State University, 2020. https://hdl.handle.net/10365/31862.

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No two species can indefinitely occupy the same ecological niche according to the competitive exclusion principle. When competing strains of the same pathogen invade a homogeneous population, the strain with the largest basic reproductive ratio R0 will force the other strains to extinction. However, over 51 pathogens are documented to have multiple strains [3] coexisting, contrary to the results from homogeneous models. In reality, the world is heterogeneous with the population varying in susceptibility. As such, the study of epidemiology, and hence the problem of pathogen coexistence should entail heterogeneity. Heterogeneous models tend to capture dynamics such as resistance to infection, giving more accurate results of the epidemics. This study will focus on the behavior of multi-pathogen heterogeneous models and will try to answer the question: what are the conditions on the model parameters that lead to pathogen coexistence? The goal is to understand the mechanisms in heterogeneous populations that mediate pathogen coexistence. Using the moment closure method, Fleming et. al. [22] used a two pathogen heterogeneous model (1.9) to show that pathogen coexistence was possible between strains of the baculovirus under certain conditions. In the first part of our study, we consider the same model using the hidden keystone variable (HKV) method. We show that under some conditions, the moment closure method and the HKV method give the same results. We also show that pathogen coexistence is possible for a much wider range of parameters, and give a complete analysis of the model (1.9), and give an explanation for the observed coexistence. The host population (gypsy moth) considered in the model (1.9) has a year life span, and hence, demography was introduced to the model using a discrete time model (1.12). In the second part of our study, we will consider a multi-pathogen compartmental heterogeneous model (3.1) with continuous time demography. We show using a Lyapunov function that pathogen coexistence is possible between multiple strains of the same pathogen. We provide analytical and numerical evidence that multiple strains of the same pathogen can coexist in a heterogeneous population.
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Keren, Nir. "Model for multi-strata safety performance measurements in the process industry." Texas A&M University, 2003. http://hdl.handle.net/1969.1/319.

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Measuring process safety performance is a challenge, and the wide variations in understanding, compliance, and implementation of process safety programs increase the challenge. Process safety can be measured in three strata: (1) measurement of process safety elements within facilities; (2) benchmarking of process safety elements among facilities; and (3) use of incident data collection from various sources for industrial safety performance assessment. The methods presently available for measurement of process safety within facilities are deficient because the results are strongly dependent on user judgment. Performance benchmarking among facilities is done within closed groups of organizations. Neither the questionnaires nor the results are available to the public. Many organizations collect data on industrial incidents. These organizations differ from each other in their interests, data collection procedures, definitions, and scope, and each of them analyzes its data to achieve its objectives. However, there have been no attempts to explore the potential of integrating data sources and harnessing these databases for industrial safety performance assessment. In this study we developed models to pursue the measurement of samples of the strata described above. The measurement methodologies employed herein overcome the disadvantages of existing methodologies and increase their capabilities.
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Hawkins, Susan. "The stability of host-pathogen multi-strain models." Thesis, University of Oxford, 2017. http://ora.ox.ac.uk/objects/uuid:c324b259-57ee-4cc4-b68c-21b4d98414da.

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Previous multi-strain mathematical models have elucidated that the degree of cross-protective responses between similar strains, acting as a form of immune selection, generates different behavioural states of the pathogen population. This thesis explores these multi-strain dynamic states, to examine their robustness and stability in the face of pathogenic intrinsic phenotypic variation, and the extrinsic force of immune selection. This is achieved in two main ways: Chapter 2 introduces phenotypic variation in pathogen transmissibility, testing the robustness of a stable pathogen population to the emergence of an introduced strain of higher transmission potential; and Chapter 3 introduces a new model with a possibility of immunity to both strain-specific and cross-strain (conserved) determinants, to investigate how heterogeneity in the specificity of a host immune response alters the pathogen population structure. A final investigation in Chapter 4 develops a method of reverse-pattern oriented modelling using a machine learning algorithm to determine which intrinsic properties of the pathogen, and their combinations, lead to particular disease-like population patterns. This research offers novel techniques to complement previous and ongoing work on multi-strain modelling, with direct applications to a range of infectious agents such as Plasmodium falciparum, influenza A, and rotavirus, but also with a wider potential for other multi-strain systems.
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Furqan, Zeeshan. "DEVELOPING STRAND SPACE BASED MODELS AND PROVING THE CORRECTNESS OF THE IEEE 802.11I AUTHENTICATION PROTOCOL WITH RESTRICTED SEC." Doctoral diss., University of Central Florida, 2007. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2864.

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The security objectives enforce the security policy, which defines what is to be protected in a network environment. The violation of these security objectives induces security threats. We introduce an explicit notion of security objectives for a security protocol. This notion should precede the formal verification process. In the absence of such a notion, the security protocol may be proven correct despite the fact that it is not equipped to defend against all potential threats. In order to establish the correctness of security objectives, we present a formal model that provides basis for the formal verification of security protocols. We also develop the modal logic, proof based, and multi-agent approaches using the Strand Space framework. In our modal logic approach, we present the logical constructs to model a protocol's behavior in such a way that the participants can verify different security parameters by looking at their own run of the protocol. In our proof based model, we present a generic set of proofs to establish the correctness of a security protocol. We model the 802.11i protocol into our proof based system and then perform the formal verification of the authentication property. The intruder in our model is imbued with powerful capabilities and repercussions to possible attacks are evaluated. Our analysis proves that the authentication of 802.11i is not compromised in the presented model. We further demonstrate how changes in our model will yield a successful man-in-the-middle attack. Our multi-agent approach includes an explicit notion of multi-agent, which was missing in the Strand Space framework. The limitation of Strand Space framework is the assumption that all the information available to a principal is either supplied initially or is contained in messages received by that principal. However, other important information may also be available to a principal in a security setting, such as a principal may combine information from different roles played by him in a protocol to launch a powerful attack. Our presented approach models the behavior of a distributed system as a multi-agent system. The presented model captures the combined information, the formal model of knowledge, and the belief of agents over time. After building this formal model, we present a formal proof of authentication of the 4-way handshake of the 802.11i protocol.
Ph.D.
School of Electrical Engineering and Computer Science
Engineering and Computer Science
Computer Science PhD
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Porras, Pérez Antonio Reyes. "Multi-cue image integration for cardiac tissue characterization." Doctoral thesis, Universitat Pompeu Fabra, 2015. http://hdl.handle.net/10803/296796.

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Una caracterización precisa y completa del tejido cardíaco es esencial para el diagnóstico y tratamiento de problemas cardíacos. Para caracterizar la función cardíaca desde diferentes perspectivas, en la práctica clínica, se adquieren grandes cantidades de datos de distinta naturaleza sobre un mismo paciente, proporcionando información útil para la evaluación del corazón. Aunque los distintos datos obtenidos de cada paciente se suelen analizar por separado para evaluar la función cardíaca desde diferentes perspectivas, la combinación efectiva de esta información heterogénea podría ser útil para tener una mejor visión de la anatomía y la función cardíaca. El objetivo principal de esta tesis es el desarrollo de métodos para integrar imágenes e información de distinta naturaleza para una caracterización del tejido cardíaco más completa y precisa.
An accurate and complete cardiac tissue characterization is essential to diagnose and treat heart problems. To characterize cardiac function from different perspectives, large amounts of data of different nature from the same patient are acquired in clinical practice, providing information that is useful for heart assessment. Although the different data obtained from each patient are often analyzed separately to assess cardiac function from different perspectives, the effective combination of this heterogeneous information may be useful for a better insight into heart anatomy and function. The main objective of this thesis is to develop methods to integrate images and information of different nature for a more complete and accurate cardiac tissue characterization.
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Mathiesen, Danielle Samone. "Experiments, Constitutive Modeling, and Multi-Scale Simulations of Large Strain Thermomechanical Behavior of Poly(methyl methacrylate) (PMMA)." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1415694651.

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Qi, Shunchao. "Numerical Investigation for Slope Stability of Expansive Soils and Large Strain Consolidation of Soft Soils." Thesis, Université d'Ottawa / University of Ottawa, 2017. http://hdl.handle.net/10393/37019.

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Several geotechnical processes can only be reliably interpreted by taking account of the soil-atmosphere interactions. This thesis investigates two geotechnical problems involving soil-atmosphere interactions that drive water flow through the soil skeleton in two opposite directions; Problem 1: slope failure in expansive soils induced by water infiltration, Problem 2: large strain consolidation of soft soils induced by water evaporation. Both problems are of practical interest for safe and economical design of various geotechnical infrastructures. Two major geotechnical activities in the world; namely, the construction of water transfer canal in expansive soil area in China and the deposition of oil sands and hard rock tailings in Canada can be cited as classic examples of Problems 1 and 2, respectively. In such problems, substantial zones of the domain may switch between an unsaturated and saturated condition. Therefore, rational analysis requires simultaneous modelling of both unsaturated and saturated soil behaviour. The first goal of this thesis is to investigate the influence of swelling (the most characteristic behaviour of expansive soils) on slope stability using numerical methods. Swelling of expansive soils contributes to slope instability during rainfall because of two key reasons (i) soil swelling affects the flow process that actually induces swelling, (i.e. a typical coupling phenomenon), and (ii) swelling-induced stress redistribution and displacement development. In this thesis, the first effect is studied by a coupled (mechanical-hydraulic) numerical analysis of the response of a slope to rainfall using commercial software (GeoSlope). The second effect, the swelling-induced stress redistribution and displacement development after wetting, is tracked using a newly developed numerical program. In the program strain softening behaviour is introduced into the elasto-plastic Mohr-Coulomb Model for modelling unsaturated soil. A novel stress (net stress and suction)-dependent model for moduli of elasticity, combined with the predictive model for shear strength based on Soil Water Retention Behaviour are incorporated into the numerical program to achieve a smooth transition between saturated and unsaturated states. The results show that soil swelling can decrease the factor of safety by accelerating the wetting front depth due to hydro-mechanical coupling, while changes of sliding mass geometry has a negligible influence. The change of stress regime associated with soil swelling is significant to induce plastic strain softening (swelling-induced softening) and contribute to the slope failures. The second goal of thesis is to develop a novel computer program for simulation of large strain consolidation of soft soil under both self-weight and evaporation conditions. This program is both theoretically sound and practically applicable. Several basic/advanced constitutive models for unsaturated soils, including State Surface Model (SSM), Barcelona Basic model (BBM), Glasgow Coupled model (GCM) and bounding surface water retention model, are innovatively implemented into a piece-wise linear framework solved using finite difference technique. The developed program is referred to as UNSATCON-(ML), which has been tested using (a) existing analytical/numerical solutions and (b) various laboratory and field studies for single-layer and multiple-layer deposition of hard rock and oil sands tailings. Features of UNSATCON-(ML) that are improvements over existing models typically used to analyze consolidation-desiccation in soft soils include: (i) coupling of soil large deformation with true unsaturated water flow; (ii) correct reproduction of the shrinkage behaviour of soil under evaporation-induced desiccation; (iii) smooth transition between saturated and unsaturated states despite that some selected models are established using two independent stress variables, (iv) ensuring strictly mass conservation of water, and (v) simulation of irrecoverable volume change and hydraulic hysteresis to properly analyze multilayer tailings deposition. A number of hypothetical field case analyses are carried out using UNSATCON-ML, illustrating its applicability to industry.
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Van, Den Eijnden Bram. "Modélisation multi-échelle du comportement hydro-méchanique des roches argileuses." Thesis, Université Grenoble Alpes (ComUE), 2015. http://www.theses.fr/2015GREAI034/document.

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Les études de faisabilité concernant le stockage géologique profond des déchets radioactifs ont conduit un intérêt accru concernant la modélisation géomécanique de la roche hte. En France, une roche hte potentielle est l'argilite du Callovo-Oxfordien du site de Meuse/Haute Marne. Etant donné que le principe de stockage géologique profond repose fortement sur la capacité de confinement de la formation hte, sa faible perméabilité est d'une importance clé. La perméabilité étant dépendante de la microstructure du matériau et de son évolution sous chargement, le comportement couplé hydro-mécanique de l'argilite est important. En effet, des modifications mécaniques sont induites par le creusement de la galerie d'entreposage, générant une zone endommagée (EDZ), pouvant conduire une modification de la perméabilité dans le voisinage de la galerie. Dans les matériaux microstructure complexe comme l'argilite du Callovo-Oxfordien, le comportement macroscopique trouve son origine dans l'interaction des constituants micro-mécaniques. En plus du couplage entre le comportement hydraulique et mécanique, un couplage entre les échelles micro et macro existe. Par le biais de l'élaboration d'un cadre d'homogénéisation du couplage hydro-mécanique, une approche de modélisation deuxéchelles est développée dans ce travail, dans laquelle la relation constitutive macroscopique découle directement du comportement à l'échelle microscopique. Un modèle existant du couplage hydro-mécanique, reposant sur l'identification de grains et d'espaces poreux intergranulaires à l'échelle micro est adopté comme point de départ. Ce modèle repose sur une homogénéisation numérique du comportement à la petite échelle afin d'obtenir à l'échelle macroscopique la réponse en contrainte et de transport du fluide interstitiel. Ce modèle est basé sur un VER périodique qui permet de déduire le comportement macroscopique local de l'argilite. En réponse, en un point d'intégration macro donné, à un incrément de la déformation et du gradient de pression, la réponse du VER permet d'exprimer l'incrément de contrainte et de flux associé, constituant de fait un équivalent numérique de la relation constitutive. Les problèmes aux conditions limites macro et micro sont traités simultanément par la méthode élément fini. Pour obtenir les opérateurs tangents consistants à l'échelle macro, la méthode d'homogénéisation par condensation statique des opérateurs tangeants micro est étendu au cas avec couplage hydro-mécanique. L'implémentation du modèle double échelle et la mise en uvre des développements théoriques d'homogénéisation ont été effectués dans le code élément fini Lagamine (Université de Liège). Pour la modélisation de la localisation de la déformation à l'échelle macro, qui, dans un formalisme de milieu continu classique, souffre de la dépendance au maillage, l'approche double-échelle a été utilisée dans un formalisme de milieu enrichi de type milieu de second gradient pour matériau poreux saturé. Les capacités du modèle homogénéisé numériquement, utilisé dans un cadre de milieu de second gradient, sont ensuite démontrées par des simulations d'essais dométriques et d'essais de compression biaxiaux. L'approche se confirme être un moyen puissant pour modéliser l'anisotropie initiale et induite du comportement mécanique et du comportement hydraulique. Pour la modélisation du comportement de l'argilite du Callovo-Oxfordien, des VER sont construits en tenant compte des travaux de caractérisation de la géométrie des inclusions microscopiques et des résultats expérimentaux d'essais macroscopiques.La loi de comportement homogénéisée numériquement ainsi calibrée est utilisée dans des simulations de creusement de galerie jusqu'à des niveaux d'endommagement générant une localisation de la déformation.Ces calculs montrent à la fois la pertinence et l'applicabilité du concept double échelle pour l'évaluation du comportement hydromécanique des EDZ dans un contexte du stockage des déchets radioactifs
Feasibility studies for deep geological radioactive waste disposal facilities have led to an increased interest in the geomechanical modelling of its host rock. In France, a potential host rock is the Callovo-Oxfordian claystone. The low permeability of this material is of key importance, as the principal of deep geological disposal strongly relies on the sealing capacity of the host formation. The permeability being coupled to the mechanical material state, hydromechanical coupled behaviour of the claystone becomes important when mechanical alterations are induced by gallery excavation in the so-called excavation damaged zone (EDZ). In materials with microstructure such as the Callovo-Oxfordian claystone [Robinet et al., 2012], the macroscopic behaviour has its origin in the interaction of its mi- cromechanical constituents. In addition to the coupling between hydraulic and mech- anical behaviour, a coupling between the micro (material microstructure) and macro will be made. By means of the development of a framework of computational homo- genization for hydromechanical coupling, a doublescale modelling approach is formu- lated, for which the macroscale constitutive relations are derived from the microscale by homogenization. An existing model for the modelling of hydromechanical coupling based on the distinct definition of grains and intergranular pore space [Frey, 2010] is adopted and modified to enable the application of first order computational homogenization for obtaining macroscale stress and fluid transport responses. This model is used to constitute a periodic representative elementary volume (REV) that allows the rep- resentation of the local macroscopic behaviour of the claystone. As a response to deformation loading, the behaviour of the REV represents the numerical equivalent of a constitutive relation at the macroscale. For the required consistent tangent operators, the framework of computational homogenization by static condensation [Kouznetsova et al., 2001] is extended to hy- dromechanical coupling. The theoretical developments of this extension are imple- mented in the finite element code Lagamine (Li` ege) as an independent constitutive relation. For the modelling of localization of deformation, which in classical FE meth- ods suffers from the well-known mesh dependency, the doublescale approach of hy- dromechanical coupling is combined with a local second gradient model [Collin et al., 2006] to control the internal length scale of localized deformation. By accepting the periodic boundary conditions as a regularization of the microscale deformation, the use of the multiscale model in combination with the local second gradient model can be used for modelling localization phenomena in HM-coupled settings with material softening. The modelling capacities of the approach are demonstrated by means of simula- tions of oedometer tests and biaxial compression tests. The approach is demonstrated to be a powerful way to model anisotropy in the mechanical as well as the hydraulic behaviour of the material both in the initial material state and as an effect of hy- dromechanical alterations. For the application to the modelling of Callovo-Oxfordian claystone, microstructural REVs are calibrated to geometrical characteristics of the inclusion that form the microstructure under consideration and to macroscale ex- perimental results of the mechanical behaviour. The calibrated constitutive relation is used in the simulation of gallery excavation processes. These computations give a proof of concept of the doublescale assessment of the hydromechanical behaviour of the excavation damaged zones around galleries in the context of nuclear waste disposal
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Prueter, Phillip Edward. "A Study of the Mechanical Design and Gear Tooth Root Strains in Flexible Pin, Multi-Stage, Planetary Wind Turbine Gear Trains Using Three Dimensional Finite Element/Contact Mechanics Models and Experiments." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1313372765.

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Books on the topic "Model multi strate"

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Petrie, Melinda. Indigenous housing needs 2009: A multi-measure needs model. Canberra: Australian Institute of Health and Welfare, 2009.

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Australian Institute of Health and Welfare. Indigenous housing needs 2005: A multi-measure needs model. Canberra: Australian Institute of Health and Welfare, 2005.

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Baljeu, J. F. Development of a multi-component internal strain-gauge balance for model tests in a cryogenic wind tunnel. Amsterdam: National Aerospace Laboratory, 1988.

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Scott, Dominic, and R. Edward Freeman. Models of Leadership in Plato and Beyond. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780198837350.001.0001.

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This book draws on Plato’s philosophy to throw light on contemporary leadership theory and practice. It combines an account of his thought with applications to modern case studies and approaches, in both politics and business. Rather than attempting to give a single ‘one-size-fits-all’ definition of leadership, his strategy was to break it into its different strands. He presents several ‘models’ of leadership, most of them images or analogies: the leader as doctor, navigator, artist, teacher, shepherd, weaver, or sower. Each model points to features of leadership that we intuitively recognize to be important (e.g. curing a social malaise, charting a new course, or weaving together the social fabric). Some were already in wide circulation in Plato’s time, like the shepherd and the navigator. What he did was to make them much richer and more complex. The book goes through the models individually, setting out the essentials of Plato’s thought and then illustrating each model with modern case studies—eighteen in total, including presidents, CEOs, and Nobel laureates. There is also a chapter comparing Plato’s models with four recent leadership approaches. Highly innovative in its approach, this book presupposes no prior knowledge of Plato, although those familiar with his philosophy will find it a fruitful way of re-reading his work. But the focus is first and foremost on leadership, rather than celebrating Plato’s achievements: the priority is to present a multi-faceted approach, which does justice to the complex phenomenon of leadership.
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United States. National Aeronautics and Space Administration., ed. On motion planning and control of multi-link lightweight robotic manipulators: Dissertion presented to the Faulty of DIvision of Graduate Studies. [Atlanta, Ga.]: Georgia Institute of Technology, 1987.

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Perillo, J. Lorenzo. Choreographing in Color. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780190054274.001.0001.

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In Choreographing in Color, J. Lorenzo Perillo investigates the development of Filipino popular dance and performance since the late 20th century. Drawing from nearly two decades of ethnography, choreographic analysis, and community engagement with artists, choreographers, and organizers, Perillo asserts the importance in shifting attention away from the predominant Philippine neoliberal and US imperialist emphasis on Filipinos as superb mimics, heroic migrants, model minorities, and natural dancers, and instead asks: what does it mean for Filipinos to navigate the violent forces of empire and neoliberalism with street dance and hip-hop? Employing critical race, feminist, and performance studies, Perillo analyzes the conditions of possibility that gave rise to Filipino dance phenomena across viral, migrant, theatrical, competitive, and diplomatic performance in the Philippines and diaspora. Advocating for serious engagements with the dancing body, Perillo rethinks a staple of hip-hop’s regulation, the “euphemism,” as a mode of social critique for understanding how folks have engaged with both racial histories of colonialism and gendered labor migration. Figures of euphemism—the zombie, hero, robot, and judge—constitute a way of seeing Filipino hip-hop as contiguous with a multi-racial repertoire of imperial crossing, thus uncovering the ways Black dance intersects Filipino racialization and reframing the ongoing, contested underdog relationship between Filipinos and US global power.
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Anand, Lallit, and Sanjay Govindjee. Continuum Mechanics of Solids. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780198864721.001.0001.

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Continuum mechanics of Solids presents a unified treatment of the major concepts in Solid Mechanics for beginning graduate students in the many branches of engineering. The fundamental topics of kinematics in finite and infinitesimal deformation, mechanical and thermodynamic balances plus entropy imbalance in the small strain setting are covered as they apply to all solids. The major material models of Elasticity, Viscoelasticity, and Plasticity are detailed and models for Fracture and Fatigue are discussed. In addition to these topics in Solid Mechanics, because of the growing need for engineering students to have a knowledge of the coupled multi-physics response of materials in modern technologies related to the environment and energy, the book also includes chapters on Thermoelasticity, Chemoelasticity, Poroelasticity, and Piezoelectricity. A preview to the theory of finite elasticity and elastomeric materials is also given. Throughout, example computations are presented to highlight how the developed theories may be applied.
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Book chapters on the topic "Model multi strate"

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Islam, Mobarakol, and Hongliang Ren. "Multi-modal PixelNet for Brain Tumor Segmentation." In Brainlesion: Glioma, Multiple Sclerosis, Stroke and Traumatic Brain Injuries, 298–308. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-75238-9_26.

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Vaidhya, Kiran, Subramaniam Thirunavukkarasu, Varghese Alex, and Ganapathy Krishnamurthi. "Multi-modal Brain Tumor Segmentation Using Stacked Denoising Autoencoders." In Brainlesion: Glioma, Multiple Sclerosis, Stroke and Traumatic Brain Injuries, 181–94. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-30858-6_16.

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Guo, Xutao, Chushu Yang, Ting Ma, Pengzheng Zhou, Shangfeng Lu, Nan Ji, Deling Li, Tong Wang, and Haiyan Lv. "Brain Tumor Segmentation Based on Attention Mechanism and Multi-model Fusion." In Brainlesion: Glioma, Multiple Sclerosis, Stroke and Traumatic Brain Injuries, 50–60. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-46643-5_5.

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Dennis, Emily L., Faisal Rashid, Julio Villalon-Reina, Gautam Prasad, Joshua Faskowitz, Talin Babikian, Richard Mink, et al. "Multi-modal Registration Improves Group Discrimination in Pediatric Traumatic Brain Injury." In Brainlesion: Glioma, Multiple Sclerosis, Stroke and Traumatic Brain Injuries, 32–42. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-55524-9_4.

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Marcinkiewicz, Michal, Jakub Nalepa, Pablo Ribalta Lorenzo, Wojciech Dudzik, and Grzegorz Mrukwa. "Segmenting Brain Tumors from MRI Using Cascaded Multi-modal U-Nets." In Brainlesion: Glioma, Multiple Sclerosis, Stroke and Traumatic Brain Injuries, 13–24. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-11726-9_2.

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Yang, Qiushi, and Yixuan Yuan. "Learning Dynamic Convolutions for Multi-modal 3D MRI Brain Tumor Segmentation." In Brainlesion: Glioma, Multiple Sclerosis, Stroke and Traumatic Brain Injuries, 441–51. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-72087-2_39.

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Zhao, Bingchao, Jia Huang, Changhong Liang, Zaiyi Liu, and Chu Han. "CNN-Based Fully Automatic Glioma Classification with Multi-modal Medical Images." In Brainlesion: Glioma, Multiple Sclerosis, Stroke and Traumatic Brain Injuries, 497–507. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-72087-2_44.

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Awasthi, Navchetan, Rohit Pardasani, and Swati Gupta. "Multi-threshold Attention U-Net (MTAU) Based Model for Multimodal Brain Tumor Segmentation in MRI Scans." In Brainlesion: Glioma, Multiple Sclerosis, Stroke and Traumatic Brain Injuries, 168–78. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-72087-2_15.

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Ribalta Lorenzo, Pablo, Michal Marcinkiewicz, and Jakub Nalepa. "Multi-modal U-Nets with Boundary Loss and Pre-training for Brain Tumor Segmentation." In Brainlesion: Glioma, Multiple Sclerosis, Stroke and Traumatic Brain Injuries, 135–47. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-46643-5_13.

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Mahmood, Qaiser, and A. Basit. "Prediction of Ischemic Stroke Lesion and Clinical Outcome in Multi-modal MRI Images Using Random Forests." In Brainlesion: Glioma, Multiple Sclerosis, Stroke and Traumatic Brain Injuries, 244–55. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-55524-9_23.

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Conference papers on the topic "Model multi strate"

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Kaputa, Daniel S., Timothy Bauch, Carson Roberts, Don McKeown, Mark Foote, and Carl Salvaggio. "MX-1: A New Multi-Modal Remote Sensing UAS Payload with High Accuracy GPS and IMU." In 2019 IEEE Systems and Technologies for Remote Sensing Applications Through Unmanned Aerial Systems (STRATUS). IEEE, 2019. http://dx.doi.org/10.1109/stratus.2019.8713292.

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Lorenz, Ronny, Christoph Flamm, Ivo Hofacker, and Peter Stadler. "Efficient Computation of Base-pairing Probabilities in Multi-strand RNA Folding." In 11th International Conference on Bioinformatics Models, Methods and Algorithms. SCITEPRESS - Science and Technology Publications, 2020. http://dx.doi.org/10.5220/0008916600230031.

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Liu, Ming, Yong-Yi Wang, David Horsley, and Steve Nanney. "Multi-Tier Tensile Strain Models for Strain-Based Design: Part 3 — Model Evaluation Against Experimental Data." In 2012 9th International Pipeline Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/ipc2012-90660.

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This is the third paper in a three-paper series related to the development of tensile strain models. The fundamental basis [1] and formulation [2] of the models are presented in two companion papers. This paper covers the evaluation of the models against large-scale experimental data which include a total of 24 full-scale pipe tests with and without internal pressure [3,4] and 30 curved wide plate (CWP) tests [5,6]. The 24 full-scale pipe specimens are nominally X65 grade (12.75″ OD and 12.7-mm wall thickness) and made by two manufacturers. The actual yield strength of the two pipes differs by approximately 14 ksi. The girth welds are made with three welding procedures, creating three weld strength levels. The full-scale test program are designed to evaluate the effects of internal pressure, weld strength mismatch, pipe strength, pipe Y/T ratio, flaw location, flaw size, and toughness. The 30 CWP specimens are from 36″ OD and 19.1 mm wall thickness X100 pipes. The girth welds are made with two welding procedures, creating two slightly different weld strength mismatch levels. The CWP test specimens expand the range of material grade and wall thickness for the model evaluation. The model evaluation demonstrates that the overall correlations between the experimental test data and model predations are similar when the model predictions are made with Level 2 and 3 procedures and various toughness options. The Level 2 procedure with Charpy energy option and Level 3b provide the best overall one-to-one correlation between the test data and model prediction. The Level 3b shows greater scatter than Level 2 with the Charpy energy option. The most significant contributor to the TSC variations and the difference between the measured and predicted TSCs is the strength variation in the pipes. A small variation in the strength can lead to a large variation of the measured remote strain even when the flaw behavior is essentially the same. For the 24 full-scale pipe tests, a strength variation of 1 ksi in the pipes would explain the large variations of the measured TSC in comparison to the model predictions. The TSC models produce consistent results that capture the overall trend of the test data.
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Farley, D., A. Dasgupta, Y. Zhou, J. F. J. Caers, and J. W. C. De Vries. "Fatigue model based on average cross-section strain of Cu trace cyclic bending." In Multi-Physics Simulation and Experiments in Microelectronics and Microsystems (EuroSimE). IEEE, 2011. http://dx.doi.org/10.1109/esime.2011.5765858.

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Masoud, Ziyad N., and Khaled A. Alhazza. "A Frequency-Modulation Command-Shaping Strategy for Multi-Mode Systems." In ASME 2013 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/detc2013-13355.

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Single-mode shaped commands can be implemented for oscillations control of multi-mode systems provided that all frequencies of the system are odd-multiples of the shaped command frequency. This criterion is utilized in this work to develop a command shaping strategy for multi-mode systems. A frequency-modulation command shaper is derived based on the use of a single-mode command-shaping technique. The proposed strategy is based on deriving a closed-loop model of a multi-mode system with its modal frequencies modulated so that higher mode frequencies are odd-multiples of the first mode frequency. A single-mode double-step primary command-shaper with a design frequency equal to the first mode frequency of the closed-loop system is then used. The input command to the plant of the closed-loop system is used as shaped commands for the multi-mode system. Numerical simulations are used to demonstrate the performance of the proposed strategy along with experiments on scaled models of a triple, quadruple, and quintuple-pendulums.
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Völker, Michael, Taiba Zahid, and Thorsten Schmidt. "A Practical Algorithmic Approach Towards Multi-Modal Resource Constrained Multi-Project Scheduling Problems (MMRCMPSP)." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-52178.

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The literature concerning resource constrained project scheduling problems (RCPSP) are mainly based on series or parallel schedule generation schemes with priority sequencing rules to resolve conflicts. Recently, these models have been extended for scheduling multi-modal RCPSP (MMRCPSP) where each activity has multiple possibilities to be performed thus providing decision managers a useful tool for manipulating resources and activities. Nonetheless, this further complicates the scheduling problem inflicted by increase of decision variables. Multiple heuristics have been proposed for this NP-hard problem. The main solution strategy adopted by such heuristics is a two loops decision strategy. Basically the problem is split between two parts where first part is conversion of MMRCPSP to RCPSP (mode fix) while second is finding feasible solution for a resource constrained project and is restricted to single project environments. This research aims on the development of scheduling heuristics, exploring the possibilities of scheduling MMRCPSP with parallel assignment of modes while sequencing the activities. The work addresses Multi-Mode Resource Constrained Multi-Project Scheduling Problem, (MMRCMPSP) by formulating a mathematical model that regards practical requirements of working systems. The algorithm is made intelligent and flexible in order to adopt and shift among various defined heuristic rules under different objectives to function as a decision support tool for managers.
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Dusek, Milos, and Christopher Hunt. "Crack Degradation Model Derived From Experimental Strain-Stress Data." In 2007 International Conference on Thermal, Mechanical and Multi-Physics Simulation Experiments in Microelectronics and Micro-Systems. EuroSime 2007. IEEE, 2007. http://dx.doi.org/10.1109/esime.2007.359950.

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Abdullah, A. B. M., Jennifer A. Rice, and H. R. Hamilton. "A damage detection model for unbonded post-tensioning tendons based on relative strain variation in multi-strand anchors." In SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, edited by Jerome P. Lynch, Kon-Well Wang, and Hoon Sohn. SPIE, 2014. http://dx.doi.org/10.1117/12.2044915.

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Liu, Neng-Wu, Guang Fu, and Lei Zhu. "Low-Profile Multi-Mode Wideband Patch Antennas." In 2018 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference (CSQRWC). IEEE, 2018. http://dx.doi.org/10.1109/csqrwc.2018.8455833.

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Huang, H., and A. Dasgupta. "Mechanistic model for the stress-strain response of double-layered PSA." In 2018 19th International Conference on Thermal, Mechanical and Multi-Physics Simulation and Experiments in Microelectronics and Microsystems (EuroSimE). IEEE, 2018. http://dx.doi.org/10.1109/eurosime.2018.8369945.

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Reports on the topic "Model multi strate"

1

Merkulova, Yuliya. Система цифровых моделей - новая технология для баланса данных. Yuliya Merkulova, April 2021. http://dx.doi.org/10.12731/er0430.26042021.

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Use of the digital technologies is new and very productive approach for balance of different data. It is very important for balance of supply and demand and for increase of competitiveness of products. Various types of digital models were developed as a result of scientific research, they found reflection in article. Digital models for the description of the list of the sequences of steps and operations of various stages and process in general allow to install system of interrelations between operations and steps and to reach necessary log-ic, increase of effectiveness of any process. Object-relational models for establishment of communications between data of various blocks of databases and functional models of the choice of strategy of data balance form analytical base for justification of the choice of the direction of transformation of data. Models of a combination of a plurality of various data of the offer of products in the form of matrixes of multi-purpose optimization have double effect, because they allow not only to develop various options of data combina-tion, taking into account opportunities of change of location of products over the markets and temporary phases, but also to estimate aggregate useful effect from products. These models together with models of comparison of various options and the choice of optimal solutions allow to generate compatible strategic and current programs of the offer of products as a plurality of the output data balanced with each other and with data of demand. It is providing the best synergetic result. The developed methodology of creation of system of the interconnected digital models for transformation of data and generation of the output data of the situational-strategic program of the offer of products is a cornerstone of formation of new digital econ-omy – of economy of balanced data.
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