Relevant bibliographies by topics / Dynamic sensitive cross section

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Dynamic sensitive cross section'

Author: Grafiati
Published: 4 June 2021
Last updated: 9 February 2022

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Journal articles on the topic "Dynamic sensitive cross section"

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Bozdogan, K. B., and D. Ozturk. "Free Vibration Analysis of a Thin-Walled Beam with Shear Sensitive Material." Mathematical Problems in Engineering 2013 (2013): 1–7. http://dx.doi.org/10.1155/2013/493905.

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This paper presents a method for a free vibration analysis of a thin-walled beam of doubly asymmetric cross section filled with shear sensitive material. In the study, first of all, a dynamic transfer matrix method was obtained for planar shear flexure and torsional motion. Then, uncoupled angular frequencies were obtained by using dynamic element transfer matrices and boundary conditions. Coupled frequencies were obtained by the well-known two-dimensional approaches. At the end of the study, a sample taken from the literature was solved, and the results were evaluated in order to test the convenience of the method.
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Bartels, Larry M. "Panel Effects in the American National Election Studies." Political Analysis 8, no. 1 (1999): 1–20. http://dx.doi.org/10.1093/oxfordjournals.pan.a029802.

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Parallel panel and fresh cross-section samples in recent National Election Study surveys provide valuable leverage for assessing the magnitude of biases in statistical analyses of survey data due to panel attrition and panel conditioning. My analyses employing a variety of typical regression models suggest that substantial panel biases are likely to be fairly rare in these data, even when panel and cross-section respondents have markedly different characteristics. However, two of the dependent variables considered here—campaign interest and turnout—do appear to be sufficiently sensitive to panel effects to warrant significant discounting or adjustment of panel data. I propose adjustments for panel effects in both cross-sectional and dynamic analyses, based upon variants of the “fractional pooling” (Bartels 1996) and “two-stage auxiliary instrumental variables” (Franklin 1990) methods.
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Rafezy, B., and W. P. Howson. "Exact dynamic stiffness matrix for a thin-walled beam of doubly asymmetric cross-section filled with shear sensitive material." International Journal for Numerical Methods in Engineering 69, no. 13 (August 31, 2006): 2758–79. http://dx.doi.org/10.1002/nme.1864.

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LIPATOV, A. V., and N. P. ZOTOV. "STUDY OF BFKL GLUON DYNAMICS IN HEAVY QUARKONIUM PHOTOPRODUCTION AT HERA." Modern Physics Letters A 15, no. 10 (March 28, 2000): 695–707. http://dx.doi.org/10.1142/s0217732300000682.

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In the framework of semihard QCD approach we consider the processes of inelastic heavy quarkonium photoproduction at HERA with emphasis on the BFKL dynamics of gluon distributions. We investigate the dependences of the total cross-section of inelastic J/Ψ photoproduction and also pT and z spectra on different forms of the unintegrated gluon distribution. It is shown that the total cross-section is most sensitive to the Pomeron intercept parameter Δ. We compare the theoretical results with the available H1 and ZEUS experimental data.
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Chen, Wei, and Zi Xing Lu. "Dynamic Crushing Behavior of the High-Density Closed-Cell Foams." Advanced Materials Research 306-307 (August 2011): 485–88. http://dx.doi.org/10.4028/www.scientific.net/amr.306-307.485.

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The face-centered cubic model is used to investigate the dynamic crushing behavior of high density closed-cell foams. The influences of the constant loading rate and the specimen aspect ratio on the crushing stress were discussed. It is demonstrated that the crushing stress is more sensitive to the constant loading rate than the specimen aspect ratio. To describe the dynamic crushing behavior of the foam theoretically, the idealized rigid-perfectly plastic-locking (RPPL) stress-strain model is extended to a more general case, in which both the density and the cross-section area are discontinuous. The good agreement between the finite element results and theoretical results confirms that the dynamic crushing behavior of foam can be described by the modified RPPL stress-strain model.
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SHARIATI, MOHSEN, and FARIBA KHOSRAVINEJAD. "THE LASER-ASSISTED FIELD EFFECT TRANSISTOR GAS SENSOR BASED ON MORPHOLOGICAL ZINC-EXCITED TIN-DOPED In2O3 NANOWIRES." Surface Review and Letters 24, no. 08 (December 2017): 1750113. http://dx.doi.org/10.1142/s0218625x1750113x.

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The gas nanosensor of indium oxide nanowires in laser assisted approach, doped with tin and zinc for gas sensing and 1D growth purposes respectively, was reported. The nanowires were very sensitive to H2S gas in low concentration of 20[Formula: see text]ppb gas at room temperature. The fast dynamic intensive and sensitive response to gas was in a few seconds with an on/off sensitivity ratio of around 10. The square cross-section indium oxide nanowires were fabricated through physical vapor deposition (PVD) mechanism and annealing approach. The field emission scanning electron microscopy (FESEM) observations indicated that the annealing temperature was vital in nanostructures’ morphology. The fabricated nanowires for the optimized annealing temperature in applied growth technique were around 60[Formula: see text]nm in diameter.
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Wouters, Peter, and Armand van Deursen. "Thermal Distortion of Signal Propagation Modes Due to Dynamic Loading in Medium-Voltage Cables." Energies 13, no. 17 (August 27, 2020): 4436. http://dx.doi.org/10.3390/en13174436.

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Temperature variation from dynamic cable loading affects the propagation characteristics of transient signals. The distortion of modal signal components as a function of temperature in a three-phase medium-voltage cable is investigated. The temperature influence arises mainly through the complex insulation permittivity, which has a non-linear relationship with temperature. Near the maximum operating temperature of the cross-linked polyethylene insulation, the propagation velocity increases by 0.56% per degree centigrade but is an order of magnitude less sensitive at ambient temperature. The paper presents modeling results based on cable impedance and admittance matrices obtained from electromagnetic field simulation, taking into account the time-varying temperature distribution in the cable cross-section. The results are verified by applying Rayleigh–Schrödinger perturbation analysis. In the time domain, signal patterns shift when the modal propagation velocities change upon cable loading. Moreover, separation of degenerate modes is observed when the cable phase conductors carry an unbalanced current. The perspectives for exploiting the temperature dependency of signal propagation for pinpointing cable defects and for dynamic rating of underground power cables are discussed.
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Li, Hui, Gao Cheng, Yongjian Liu, and Dan Zhong. "Anomalous Thermal Response of Graphene Kirigami Induced by Tailored Shape to Uniaxial Tensile Strain: A Molecular Dynamics Study." Nanomaterials 10, no. 1 (January 9, 2020): 126. http://dx.doi.org/10.3390/nano10010126.

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The mechanical and thermal properties of graphene kirigami are strongly dependent on the tailoring structures. Here, thermal conductivity of three typical graphene kirigami structures, including square kirigami graphene, reentrant hexagonal honeycomb structure, and quadrilateral star structure under uniaxial strain are explored using molecular dynamics simulations. We find that the structural deformation of graphene kirigami is sensitive to its tailoring geometry. It influences thermal conductivity of graphene by changing heat flux scattering, heat path, and cross-section area. It is found that the factor of cross-section area can lead to four times difference of thermal conductivity in the large deformation system. Our results are elucidated based on analysis of micro-heat flux, geometry deformation, and atomic lattice deformation. These insights enable us to design of more efficient thermal management devices with elaborated graphene kirigami materials.
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LIU, JIAN YE, WEN-JUN GUO, WEI ZUO, and XI GUO LEE. "STUDIES FOR THE EQUATION OF STATE IN THE ISOSPIN ASYMMETRICAL NUCLEAR INTERACTIONS." International Journal of Modern Physics E 18, no. 03 (March 2009): 675–91. http://dx.doi.org/10.1142/s0218301309012793.

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In order to determine the equation of state in the isospin asymmetrical nuclear interactions, we have found the observables for extracting the information of them within the isospin-dependent quantum molecular dynamics in recent years. The several sensitive probes for extracting the information of the in-medium nucleon–nucleon cross section and the symmetry potential have found; meanwhile, their mechanisms are investigated in more details. The main point in this paper gives the summary for above probes and their outlook in the future.
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Dargay, Joyce M., Jean-Loup Madre, and Akli Berri. "Car Ownership Dynamics Seen Through the Follow-Up of Cohorts: Comparison of France and the United Kingdom." Transportation Research Record: Journal of the Transportation Research Board 1733, no. 1 (January 2000): 31–38. http://dx.doi.org/10.3141/1733-05.

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The dynamics of car ownership based on age-cohort data constructed from repeated cross-section surveys is investigated for France and the United Kingdom, both nationally and for different geographic areas. Two different modeling strategies are used: a demographic approach and a dynamic econometric approach. The demographic approach is primarily oriented toward long-term forecasting. It takes into account changes in car ownership over the life cycle for each generation, differences between generations, and period effects explained by income and prices. The dynamic econometric approach is mainly concerned with estimating the elasticity of car ownership with respect to income and prices in the short and long run. It is based on a dynamic model in which household car ownership is specified as a function of income, prices, sociodemographic factors, and previous car ownership. The results using the two approaches are quite similar. The income elasticity is significantly higher in the United Kingdom than in France, is higher in rural than in urban areas, and decreases over time as car ownership increases. Generation gaps, which have been important between older generations, are not significant for households whose head was born after the 1940s, which implies that the diffusion of car ownership over generations is nearing completion. In addition, a declining income elasticity confirms a progressive evolution toward saturation. Finally, car ownership is considerably more sensitive to car purchase prices than to gasoline prices and both appear to be more significant in densely populated zones than in rural areas.
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Dissertations / Theses on the topic "Dynamic sensitive cross section"

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Johnson, Darrel E. "Estimating the Dynamic Sensitive Cross Section of an FPGA Design through Fault injection." Diss., CLICK HERE for online access, 2005. http://contentdm.lib.byu.edu/ETD/image/etd803.pdf.

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NINA, JULIO CESAR COAQUIRA. "NONLINEAR OSCILLATIONS AND DYNAMIC INSTABILITY OF THIN-WALLED BEAMS WITH OPEN CROSS-SECTION." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2016. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=33893@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO
COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR
PROGRAMA DE EXCELENCIA ACADEMICA
Estruturas com elementos de seção aberta e paredes delgadas são amplamente utilizados em estruturas metálicas. Estes elementos têm, em geral, baixa rigidez a torção. Para seções monosimétricas e assimétricas, quando o centro de cisalhamento não coincide com o centro de gravidade, pode ocorrer acoplamento entre flexão e torção. Devido à baixa rigidez à torção, podem ocorrer grandes rotações das seções transversais da viga. Assim, uma análise do comportamento de tais elementos estruturais, levando em consideração a não linearidade geométrica, é desejável. Com este objetivo, equações diferenciais parciais de movimento que descrevem o acoplamento flexão-flexão-torção são utilizadas, em conjunto com o método de Galerkin, para se obter um conjunto de equações discretizadas de movimentos, que é resolvido pelo método Runge-Kutta. A partir das equações linearizadas, obtêm-se as frequências naturais, cargas críticas axiais e a relação entre carga axial e frequência para vigas com diferentes condições de contorno. A seguir, estudam-se as oscilações não lineares e bifurcações de uma viga engastada-livre submetida a cargas laterais harmônicas. Uma análise paramétrica detalhada, usando várias ferramentas de dinâmica não linear, investiga o comportamento dinâmico não linear e não planar da viga nas três primeiras regiões de ressonância e a influência da não linearidade, posição do carregamento, restrições à torção e parâmetros de controle do carregamento na estabilidade dinâmica da estrutura.
Structural elements with open and thin-walled section are widely used in metal structures. These elements have, in general, low torsional stiffness. For monosymmetric and asymmetric sections, when the shear center does not coincide with the center of gravity coupling between bending and torsion may occur. Due to the low torsional stiffness, large twist beam cross sections may arise. Thus, an analysis of the behavior of such structural elements, taking into account the geometric nonlinearity, is desirable. For this purpose, partial differential equations describing the flexural-flexural-torsional coupling are used in conjunction with the Galerkin method to obtain a set of discretized equations of motion, which is solved by the Runge-Kutta method. From the linearized equations, we obtain the natural frequencies, axial critical loads, and the axial load and frequency relationship for beams with different boundary conditions. Next, we study the nonlinear oscillations and bifurcations of a clamped-free beam subjected to harmonic lateral loads. A detailed parametric analysis, using various nonlinear dynamics tools, investigates the nonlinear dynamic behavior and nonplanar motions of the beam for the first three regions of resonance and the influence of the non-linearity, loading position, torsional restraints and load control parameters on the dynamic stability of the structure.
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Bañbura, Marta. "Essays in dynamic macroeconometrics." Doctoral thesis, Universite Libre de Bruxelles, 2009. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210294.

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The thesis contains four essays covering topics in the field of macroeconomic forecasting.

The first two chapters consider factor models in the context of real-time forecasting with many indicators. Using a large number of predictors offers an opportunity to exploit a rich information set and is also considered to be a more robust approach in the presence of instabilities. On the other hand, it poses a challenge of how to extract the relevant information in a parsimonious way. Recent research shows that factor models provide an answer to this problem. The fundamental assumption underlying those models is that most of the co-movement of the variables in a given dataset can be summarized by only few latent variables, the factors. This assumption seems to be warranted in the case of macroeconomic and financial data. Important theoretical foundations for large factor models were laid by Forni, Hallin, Lippi and Reichlin (2000) and Stock and Watson (2002). Since then, different versions of factor models have been applied for forecasting, structural analysis or construction of economic activity indicators. Recently, Giannone, Reichlin and Small (2008) have used a factor model to produce projections of the U.S GDP in the presence of a real-time data flow. They propose a framework that can cope with large datasets characterised by staggered and nonsynchronous data releases (sometimes referred to as “ragged edge”). This is relevant as, in practice, important indicators like GDP are released with a substantial delay and, in the meantime, more timely variables can be used to assess the current state of the economy.

The first chapter of the thesis entitled “A look into the factor model black box: publication lags and the role of hard and soft data in forecasting GDP” is based on joint work with Gerhard Rünstler and applies the framework of Giannone, Reichlin and Small (2008) to the case of euro area. In particular, we are interested in the role of “soft” and “hard” data in the GDP forecast and how it is related to their timeliness.

The soft data include surveys and financial indicators and reflect market expectations. They are usually promptly available. In contrast, the hard indicators on real activity measure directly certain components of GDP (e.g. industrial production) and are published with a significant delay. We propose several measures in order to assess the role of individual or groups of series in the forecast while taking into account their respective publication lags. We find that surveys and financial data contain important information beyond the monthly real activity measures for the GDP forecasts, once their timeliness is properly accounted for.

The second chapter entitled “Maximum likelihood estimation of large factor model on datasets with arbitrary pattern of missing data” is based on joint work with Michele Modugno. It proposes a methodology for the estimation of factor models on large cross-sections with a general pattern of missing data. In contrast to Giannone, Reichlin and Small (2008), we can handle datasets that are not only characterised by a “ragged edge”, but can include e.g. mixed frequency or short history indicators. The latter is particularly relevant for the euro area or other young economies, for which many series have been compiled only since recently. We adopt the maximum likelihood approach which, apart from the flexibility with regard to the pattern of missing data, is also more efficient and allows imposing restrictions on the parameters. Applied for small factor models by e.g. Geweke (1977), Sargent and Sims (1977) or Watson and Engle (1983), it has been shown by Doz, Giannone and Reichlin (2006) to be consistent, robust and computationally feasible also in the case of large cross-sections. To circumvent the computational complexity of a direct likelihood maximisation in the case of large cross-section, Doz, Giannone and Reichlin (2006) propose to use the iterative Expectation-Maximisation (EM) algorithm (used for the small model by Watson and Engle, 1983). Our contribution is to modify the EM steps to the case of missing data and to show how to augment the model, in order to account for the serial correlation of the idiosyncratic component. In addition, we derive the link between the unexpected part of a data release and the forecast revision and illustrate how this can be used to understand the sources of the

latter in the case of simultaneous releases. We use this methodology for short-term forecasting and backdating of the euro area GDP on the basis of a large panel of monthly and quarterly data. In particular, we are able to examine the effect of quarterly variables and short history monthly series like the Purchasing Managers' surveys on the forecast.

The third chapter is entitled “Large Bayesian VARs” and is based on joint work with Domenico Giannone and Lucrezia Reichlin. It proposes an alternative approach to factor models for dealing with the curse of dimensionality, namely Bayesian shrinkage. We study Vector Autoregressions (VARs) which have the advantage over factor models in that they allow structural analysis in a natural way. We consider systems including more than 100 variables. This is the first application in the literature to estimate a VAR of this size. Apart from the forecast considerations, as argued above, the size of the information set can be also relevant for the structural analysis, see e.g. Bernanke, Boivin and Eliasz (2005), Giannone and Reichlin (2006) or Christiano, Eichenbaum and Evans (1999) for a discussion. In addition, many problems may require the study of the dynamics of many variables: many countries, sectors or regions. While we use standard priors as proposed by Litterman (1986), an

important novelty of the work is that we set the overall tightness of the prior in relation to the model size. In this we follow the recommendation by De Mol, Giannone and Reichlin (2008) who study the case of Bayesian regressions. They show that with increasing size of the model one should shrink more to avoid overfitting, but when data are collinear one is still able to extract the relevant sample information. We apply this principle in the case of VARs. We compare the large model with smaller systems in terms of forecasting performance and structural analysis of the effect of monetary policy shock. The results show that a standard Bayesian VAR model is an appropriate tool for large panels of data once the degree of shrinkage is set in relation to the model size.

The fourth chapter entitled “Forecasting euro area inflation with wavelets: extracting information from real activity and money at different scales” proposes a framework for exploiting relationships between variables at different frequency bands in the context of forecasting. This work is motivated by the on-going debate whether money provides a reliable signal for the future price developments. The empirical evidence on the leading role of money for inflation in an out-of-sample forecast framework is not very strong, see e.g. Lenza (2006) or Fisher, Lenza, Pill and Reichlin (2008). At the same time, e.g. Gerlach (2003) or Assenmacher-Wesche and Gerlach (2007, 2008) argue that money and output could affect prices at different frequencies, however their analysis is performed in-sample. In this Chapter, it is investigated empirically which frequency bands and for which variables are the most relevant for the out-of-sample forecast of inflation when the information from prices, money and real activity is considered. To extract different frequency components from a series a wavelet transform is applied. It provides a simple and intuitive framework for band-pass filtering and allows a decomposition of series into different frequency bands. Its application in the multivariate out-of-sample forecast is novel in the literature. The results indicate that, indeed, different scales of money, prices and GDP can be relevant for the inflation forecast.


Doctorat en Sciences économiques et de gestion
info:eu-repo/semantics/nonPublished

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Jrad, Wassim. "Dynamic behavior of thin-walled beams : Analytical, numerical and experimental approaches." Electronic Thesis or Diss., Université de Lorraine, 2019. http://www.theses.fr/2019LORR0271.

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Les poutres à parois minces à sections ouvertes sont des éléments de base des ouvrages courants en génie civil, de l'automobile et de l'aéronautique. En raison de leur élancement et la forme des sections, elles sont très sensibles à la torsion et aux instabilités aussi bien en statique qu’en dynamique. En dynamique, les modes de vibration en torsion sont plus dominants par rapport au modes de flexion classiques. Pour ces raisons, les défaillances planaires de telles structures sont connues pour être une exception plutôt qu'une règle. Dans ce travail de thèse, on s’intéresse au comportement dynamique de poutres à parois minces et à section ouvertes arbitraires. En se basant sur le modèle de Vlasov qui prend en compte de la torsion et du gauchissement, les équations de mouvement 3D sont dérivées à partir du principe d’Hamilton. Des solutions analytiques originales pour différentes conditions aux limites sont dérivées pour des modes supérieurs en vibrations libres. Dans ces solutions, les effets des termes de rotation inertiels en flexion et torsion sont pris en compte. Pour des cas généraux, un modèle élément fini de poutre 3D est décrit et implémenté. Dans le modèle, un degré de liberté (ddl) est affecté au gauchissement. Toutes les matrices de rigidité masse de base sont calculées par intégration numérique (intégration de Gauss). Dans le modèle, les calculs en vibrations libres et forcées sont possibles. Le modèle est validé par comparaison aux solutions numériques et expérimentaux de la littérature. Une comparaison aux simulations des codes commerciaux est aussi suivie. Afin de valider le modèle théorique et numérique utilisé, une campagne d’essais a été suivie au LEM3 à Metz. Des essais de vibration libre et forcée sont effectués sur des poutres à parois minces avec différentes conditions aux limites. Les solutions analytiques, numériques et les mesures expérimentales sont comparées et validées. Un bon accord entre les différentes solutions est constaté. Le modèle est étendu aux poutres 3D retenues latéralement par des entretoises. Des ressorts élastiques et visqueux 3D sont ajoutés dans le modèle numérique. L'effet des entretoises est étudié dans le but d’améliorer le comportement des poutres à parois minces vis-à-vis des modes indésirables de type flexion latérale et torsion
Thin-walled beams with open section constitute main elements in engineering applications fields as in civil engineering, automotive and aerospace construction. Due to slenderness and cross section shapes, these elements are very sensitive to torsion and instabilities in both statics and dynamics. In dynamics, the torsional and flexural-torsional modes of vibration are often lower frequencies compared to the classical plane pure bending modes. Thus, planar failures of such structures are known to be an exception rather than a rule. In torsion, warping is important and governs the behavior. In this thesis work, we are interested with the dynamic behavior of thin-walled beams with arbitrary open cross sections. Based on the Vlasov’s model accounting for warping, the 3D motion equations are derived from the Hamilton’s principle. Original analytical solutions for different boundary conditions are derived for higher free vibration modes. In these solutions, the effects of the inertial rotation terms in bending and torsion are taken into consideration. For more general cases, a 3D beam finite element model is described and implemented. Compared to conventional 3D beams, warping is considered as an additional Degree Of Freedom (DOF). The mass and stiffness matrices are obtained by numerical integration (Gauss method). In the model, free and forced vibration analyses are possible. The model is validated by comparison with benchmark solutions available in the literature and other numerical results obtained from simulation on commercial codes. In order to validate the present model, laboratory test campaign is undertaken at the LEM3 laboratory in Metz. Tests are carried out on thin-walled beams with different boundary conditions. Free and forced vibration tests are performed using impact hammer and shaker machine. In the presence of arbitrary sections, flexural-torsional vibration modes are observed. The analytical, the numerical and the experimental solutions are compared and validated. Moreover, the numerical and experimental dynamic response spectra are compared. A good agreement between the various solutions is remarked. The model is extended to 3D beams in presence of lateral braces. 3D elastic and viscous springs are added in the finite element model. The effect of the springs is studied in order to improve the behavior of thin-walled beams against undesirable lateral bending and torsion modes
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Nadel-Turonski, Pawel. "Experimental Studies of Neutron Emission Induced by Heavy-Ion Scattering." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis : Univ.-bibl. [distributör], 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-3570.

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Mönch, Emanuel. "Essays on financial markets and the macroeconomy." Doctoral thesis, Humboldt-Universität zu Berlin, Wirtschaftswissenschaftliche Fakultät, 2006. http://dx.doi.org/10.18452/15564.

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Diese Arbeit besteht aus vier Essays, die empirische und methodische Beiträge zu den Gebieten der Finanzmarktökonomik und der Makroökonomik liefern. Der erste Essay beschäftigt sich mit der Spezifikation der Investoren verfügbaren Informationsmenge in Tests bedingter Kapitalmarktmodelle. Im Speziellen schlägt es die Verwendung dynamischer Faktoren als Instrumente vor. Diese fassen per Konstruktion die Information in einer Vielzahl von Variablen zusammen und stellen daher intuitive Maße für die Investoren zur Verfügung stehenden Informationen dar. Es wird gezeigt, dass so die Schätzfehler bedingter Modelle im Vergleich zu traditionellen, auf einzelnen Indikatoren beruhenden Modellvarianten substantiell verringert werden. Ausgehend von Ergebnissen, dass die Zentralbank zur Festlegung des kurzfristigen Zinssatzes eine große Menge an Informationen berücksichtigt, wird im zweiten Essay im Rahmen eines affinen Zinsstrukturmodells eine ähnliche Idee verwandt. Speziell wird die Dynamik des kurzfristigen Zinses im Rahmen einer Faktor-Vektorautoregression modelliert. Aufbauend auf dieser dynamischen Charakterisierung der Geldpolitik wird dann die Zinsstruktur unter der Annahme fehlender Arbitragemöglichkeiten hergeleitet. Das resultierende Modell liefert bessere Vorhersagen US-amerikanischer Anleihenzinsen als eine Reihe von Vergleichsmodellen. Der dritte Essay analysiert die Vorhersagekraft der Zinsstrukturkomponenten "level", "slope", und "curvature" im Rahmen eines dynamischen Faktormodells für makroökonomische und Zinsdaten. Das Modell wird mit einem Metropolis-within-Gibbs Sampling Verfahren geschätzt, und Überraschungsänderungen der drei Komponenten werden mit Hilfe von Null- und Vorzeichenrestriktionen identifiziert. Die Analyse offenbart, dass der "curvature"-Faktor informativer in Bezug auf die zukünftige Entwicklung der Zinsstruktur und der gesamtwirtschaftlichen Aktivität ist als bislang vermutet. Der vierte Essay legt eine monatliche Chronologie der Konjunkturzyklen im Euro-Raum vor. Zunächst wird mit Hilfe einer verallgemeinerten Interpolationsmethode eine monatliche Zeitreihe des europäischen BIP konstruiert. Anschließend wird auf diese Zeitreihe ein Datierungsverfahren angewandt, das kurze und flache Konjunkturphasen ausschließt.
This thesis consists of four essays of independent interest which make empirical and methodological contributions to the fields of financial economics and macroeconomics. The first essay deals with the proper specification of investors’ information set in tests of conditional asset pricing models. In particular, it advances the use of dynamic factors as conditioning variables. By construction, dynamic factors summarize the information in a large number of variables and are therefore intuitively appealing proxies for the information set available to investors. The essay demonstrates that this approach substantially reduces the pricing errors implied by conditional models with respect to traditional approaches that use individual indicators as instruments. Following previous evidence that the central bank uses a large set of conditioning information when setting short-term interest rates, the second essay employs a similar insight in a model of the term structure of interest rates. Precisely, the dynamics of the short-term interest rate are modelled using a Factor-Augmented Vector-Autoregression. Based on this dynamic characterization of monetary policy, the term structure of interest rates is derived under the assumption of no-arbitrage. The resulting model is shown to provide superior out-of-sample forecasts of US government bond yields with respect to a number of benchmark models. The third essay analyzes the predictive information carried by the yield curve components level, slope, and curvature within a joint dynamic factor model of macroeconomic and interest rate data. The model is estimated using a Metropolis-within-Gibbs sampling approach and unexpected changes of the yield curve components are identified employing a combination of zero and sign restrictions. The analysis reveals that the curvature factor is more informative about the future evolution of the yield curve and of economic activity than has previously been acknowledged. The fourth essay provides a monthly business cycle chronology for the Euro area. A monthly series of Euro area real GDP is constructed using an interpolation routine that nests previously suggested approaches as special cases. Then, a dating routine is applied to the interpolated series which excludes business cycle phases that are short and flat.
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Weinhold, Diana Marie. "Dynamic, cross-section analysis of growth and development." 1994. http://catalog.hathitrust.org/api/volumes/oclc/30638465.html.

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Chen, Sichong, and 思翀 陳. "Essays on the Dynamic and Cross-Section of Stock Returns." Thesis, 2010. http://hdl.handle.net/10086/18480.

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Chang, Shu-Hao, and 張書豪. "Dynamic Analysis of Out-of-Plane Curved-Beam Structure withVariable Cross-Section and Curvaturee." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/55200186451979273748.

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碩士
淡江大學
土木工程學系
85
Curved members are usually used in civil engineering, and are analyzed by using the straight beam finite element method in practical engineering design. The finite element modeling is convenient. However, its accuracy is not assured. In the other hand, the analytical solutions of arches are limited to circular arcs with constant cross-section, and are hard to be applied to arches with variable cross-section and variable curvature. Therefore, the actual engineering structures of complex shapes and cross-sections can not be solved by the analytical method. The purpose of this thesis is to overcome the deficiency of the finite element method and analytical method. In this thesis, the dynamic stiffness method and the analytical method (series solution method) are combined to investigate the out-of-plane responses of arches with variable cross-section and curvature. The free vibration analysis, the transient analysis of external dynamic loading and multiple support motion, and the stochastic analysis due to earthquake automatic spectrum are studied. First of all, the arch is separated into several element according to the dynamic stiffness method. In the frequency domain or the Laplace*s domain, the local dynamic stiffness is formulated through the ordinary differential equtions of motion for the arches by using the series solution method. The local dynamic stiffness is then assembled into the global dynamic stiffness. In the free vibration analysis, the iteration method is adopted to solve for the natural frequencies. The accurate transient responses are obtained by using the Laplace transform and inverse transform proposed by Durbin. At last, the stochastic responses due to earthquake are calculated by multiple input/multiple output formulation. To study the out- of-plane response of arches with complex shapes and cross- sections, a new solution scheme is proposed in this thesis, incorporationthe benefits of the dynamic stiffness method and the series solution method. The arch structures can be separated into elements as the finite element method, and the series solution method is used to solve the differential governing equations. Therefore, very accurate natural frequencies, displacement, shear force, and moment responses are obtained. The present method can be further applied in the practical engineering design.
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GUO, WEI-HAN, and 郭維漢. "A study on the linearized analytical method of dynamic water quality model with circular cross section." Thesis, 1992. http://ndltd.ncl.edu.tw/handle/42789348438629404187.

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Books on the topic "Dynamic sensitive cross section"

1

Quah, Danny. Exploiting cross section variation for unit root inference in dynamic data. Stockholm: Stockholm University, Institute for International Economic Studies, 1993.

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Quah, Danny. Exploiting cross section variation for unit root inference in dynamic data. London: London School of Economics, Financial Markets Group, 1994.

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Bekbasarov, Isabay. Study of the process of driving piles and dies on models. ru: INFRA-M Academic Publishing LLC., 2020. http://dx.doi.org/10.12737/1074097.

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The monograph presents the results of experimental and theoretical studies conducted using models of driven piles and tape dies. The influence of the cross-section size, length, shape of the trunk and the lower end of the piles on their submergability, energy intensity of driving and load-bearing capacity was evaluated. The design and technological features of new types of piles are considered. A method for determining the load-bearing capacity of a pile model based on the results of dynamic tests has been developed. Similarity conditions and formulas are presented that provide modeling of the pile driving process in the laboratory. The influence of the shape of the tape dies on their submersibility, energy consumption of the driving and the bearing capacity of the foundations arranged in the vyshtampovannyh pits was evaluated. The method of determining the load-bearing capacity of a belt Foundation model based on the results of pit vyshtampovyvaniya is described. Recommendations on the choice of optimal parameters of piles and foundations, arranged in vystupovani pits. Recommended for researchers, specialists of design and construction organizations, doctoral students, postgraduates, undergraduates and students of construction and water management specialties.
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Naval Air Warfare Center (U.S.). Aircraft Division, ed. Chesapeake Test Range: Dynamic in-flight radar cross-section measurements. [Patuxent River, Md.?]: Naval Air Warfare Center, Aircraft Division, 1993.

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Uncertainty analysis procedures for dynamic radar cross section measurements at the Atlantic Test Range. Boulder, Colo: U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 1998.

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Uncertainty analysis procedures for dynamic radar cross section measurements at the Atlantic Test Range. Boulder, Colo: U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 1998.

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J, Sorgnit, and National Institute of Standards and Technology (U.S.), eds. Uncertainty analysis procedures for dynamic radar cross section measurements at the Atlantic Test Range. Boulder, Colo: U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 1998.

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Svrakic, Dragan M., and Mirjana Divac Jovanovic. The Fragmented Personality. Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780190884574.001.0001.

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This book pioneers a new model of personality disorder primarily intended to serve mental health professionals, those already in practice and equally those in training. In contrast to the static concepts of mental normalcy and pathology, the presented nosology is dynamic (accounts for the reversibility of mental functioning) and personalized, context- and time sensitive. In a 3D diagnostic cylinder, the coordinates cross match the person’s common level of mental functioning (vertical diagnosis) with his or her behavior style (horizontal diagnosis) at a point in space and a unit of time, giving the clinician precise milestones to monitor changes in diagnosis and progress in therapy. The central problem with persons suffering from personality disorder does not rest in their extreme behaviors but rather underneath the surface, in the fragmented substrate of personality (a core deficit sine qua non shared by all individual variants), while extreme behaviors merely represent variable compensatory strategies. Based on this model, mechanism-based treatments are outlined: reconstructive interpersonal psychotherapy (a novel, integrative, transtheoretical approach which relies on psychoanalytic and humanist traditions) and mechanism-based pharmacotherapy of neurobiological vulnerabilities associated with excessive temperament traits.
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Powers, Melinda. Diversifying Greek Tragedy on the Contemporary US Stage. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198777359.001.0001.

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Demonstrating that ancient drama can be a powerful tool in seeking justice, this book investigates a cross section of live theatrical productions on the US stage that have reimagined Greek tragedy to address political and social concerns. To address this subject, it engages with some of the latest research in the field of performance studies to interpret not dramatic texts in isolation from their performance context, but instead the dynamic experience of live theatre. The book’s focus is on the ability of engaged performances to pose critical challenges to long-standing stereotypes that have contributed to the misrepresentation and marginalization of under-represented communities. Yet, in the process, it also uncovers the ways in which performances can inadvertently reinforce the very stereotypes they aim to challenge. This book thus offers a study of the live performance of Greek drama and its role in creating and reflecting social, cultural, and historical identity in contemporary America.
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Fulford, K. W. M., Martin Davies, Richard G. T. Gipps, George Graham, John Z. Sadler, Giovanni Stanghellini, and Tim Thornton, eds. The Oxford Handbook of Philosophy and Psychiatry. Oxford University Press, 2013. http://dx.doi.org/10.1093/oxfordhb/9780199579563.001.0001.

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This book presents a lively cross section of recent cross-disciplinary research in the rapidly expanding field of philosophy and psychiatry. Co-branded between theOxford Philosophy Handbookand IPPP (International Perspectives in Philosophy and Psychiatry) book series, the volume includes a number of features designed to reflect the dynamic two-way interplay between theory and practice that has emerged as such a key feature of the new field. Thus, 1) the topics covered include many of the standard problems of philosophy (such as consciousness, other minds, freedom, and personal identity) but these are organised into sections reflecting the stages of the clinical encounter (from first contact, through psychopathology and diagnosis to causation and thence to care and cure); 2) although predominantly philosophical in focus each chapter draws in different ways on practice-informed expertise (including clinical, scientific and service user perspectives); 3) the development of the book was supported by an international advisory board including a mental health NGO as well as academic organisations; and 4) the book is further supported by a unique web-site resource of first-hand narratives of mental disorder and other practice-based materials. In incorporating these features,The Oxford Handbook of Philosophy and Psychiatryaims not merely to reflect the current state of the field but also to drive its further development as a distinctively philosophical contribution to twenty-first century mental health.
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Book chapters on the topic "Dynamic sensitive cross section"

1

Knott, Eugene F. "Dynamic Test Ranges." In Radar Cross Section Measurements, 430–81. Boston, MA: Springer US, 1993. http://dx.doi.org/10.1007/978-1-4684-9904-9_11.

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Mokrzycka, Justyna. "VaR and ES Calculation with a Bayesian Dynamic tCopula-GARCH Model." In Advances in Cross-Section Data Methods in Applied Economic Research, 685–703. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-38253-7_46.

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Yang, Jiannan, David Thompson, and Atul Bhaskar. "Dynamic Models of Railway Track Taking Account of Cross-Section Deformation at High Frequency." In Notes on Numerical Fluid Mechanics and Multidisciplinary Design, 125–33. Tokyo: Springer Japan, 2012. http://dx.doi.org/10.1007/978-4-431-53927-8_15.

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Xue, Fuchun, Jianlin Ma, and Liping Yan. "Dynamic Field Tests on the Base of a Large Cross-Section High-Speed Railway Tunnel." In Lecture Notes in Civil Engineering, 411–28. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-2349-6_26.

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Tripathy, Debasish, and Kingshook Bhattacharyya. "Dynamic Analysis of a Magnetohydrodynamic Journal Bearing of Circular Cross Section in a Rotating Coordinate Frame." In Lecture Notes in Mechanical Engineering, 1135–41. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-0550-5_108.

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Nechaev, V. I. "Design of circular cross-section tunnel lining for dynamic loads." In Geoecology and Computers, 133–35. Routledge, 2018. http://dx.doi.org/10.1201/9780203753620-17.

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Diebold, Francis X., and Glenn D. Rudebusch. "Dynamic Nelson-Siegel." In Yield Curve Modeling and Forecasting. Princeton University Press, 2013. http://dx.doi.org/10.23943/princeton/9780691146805.003.0002.

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This chapter starts with static in the cross section, then proceeds quickly to dynamic Nelson–Siegel modeling, with all its nuances and opportunities. Among other things, it emphasizes the model's state-space structure, generalizes it to the multicountry context, and highlights aspects of its use in risk management and forecasting.
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Lee, H., S. Oh, N. Chun, and H. Lee. "Static and dynamic windproof efficiency evaluation for bridge cross section considered transmission of fairing." In Bridge Maintenance, Safety, Management, Resilience and Sustainability, 3393–99. CRC Press, 2012. http://dx.doi.org/10.1201/b12352-510.

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Maheshkar, Chandan, and Vinod Sharma. "Cross-Cultural Business Education." In Handbook of Research on Cross-Cultural Business Education, 1–35. IGI Global, 2018. http://dx.doi.org/10.4018/978-1-5225-3776-2.ch001.

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Today, the scenario of cross-cultural businesses has made it incomparable to the earlier practices as well as an academic phenomenon, due to increasing internationalization and immigration in global job markets. The chapter attempts to notify the significance of culture in business and need for cross-cultural business awareness. It examines how the inclusion of cross-cultural perspectives into business practices will help to create a dynamic environment that facilitates enhanced competence to companies operating across cultures. This chapter has been developed in two parts. In its first part, the chapter discusses the cross-cultural problems and their possible solutions to effectively manage the cultural diversity. In the second part of the chapter, a model, Global Industry Academia (GIA) framework of business education has been introduced. This model enables the B-schools to explore essential constituents of contextual paradigms of change and interpret the complexities of business practices in diverse settings to develop cross-culturally sensitive managers of tomorrow.
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Maheshkar, Chandan, and Vinod Sharma. "Cross-Cultural Business Education." In Research Anthology on Business and Technical Education in the Information Era, 677–711. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-5345-9.ch038.

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Today, the scenario of cross-cultural businesses has made it incomparable to the earlier practices as well as an academic phenomenon, due to increasing internationalization and immigration in global job markets. The chapter attempts to notify the significance of culture in business and need for cross-cultural business awareness. It examines how the inclusion of cross-cultural perspectives into business practices will help to create a dynamic environment that facilitates enhanced competence to companies operating across cultures. This chapter has been developed in two parts. In its first part, the chapter discusses the cross-cultural problems and their possible solutions to effectively manage the cultural diversity. In the second part of the chapter, a model, Global Industry Academia (GIA) framework of business education has been introduced. This model enables the B-schools to explore essential constituents of contextual paradigms of change and interpret the complexities of business practices in diverse settings to develop cross-culturally sensitive managers of tomorrow.
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Conference papers on the topic "Dynamic sensitive cross section"

1

Xing, J. W., and G. T. Zheng. "Derivatives and Parameter Designs of Arbitrary Cross-Section Inhomogenous Beams’ Modes." In ASME 2013 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/dscc2013-3725.

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As highly sensitive to structural parameter variations, it is necessary to study relations between derivatives of displacement modes and structural design parameters. This paper proposes an integral technique for obtaining the analytical solutions of slope and curvature modes of arbitrary cross-section inhomogeneous cantilever beam. The method is validated by comparing the computation results of modal frequencies and shapes with both numerical and analytical solutions. Furthermore, based on the presented method, we have established explicit expressions for the structural parameters sensitivity of the slope/curvature mode shapes. An example of parameter design is also presented for a cantilever beam with the proposed sensitivity analysis method.
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Shaozhen Song, Zhihong Huang, and Ruikang K. Wang. "Assessing cross-sectional elasticity map by dynamic imaging acoustic waves with phase sensitive optical coherence tomography." In 2013 IEEE International Ultrasonics Symposium (IUS). IEEE, 2013. http://dx.doi.org/10.1109/ultsym.2013.0298.

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Qin, X. R., K. C. S. Kwok, C. H. Fok, and P. A. Hitchcock. "Effects of Frequency Ratio on the Aerodynamic and Dynamic Properties of Bridge Decks." In ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/pvp2006-icpvt-11-94009.

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A series of wind tunnel sectional model dynamic tests were conducted to examine the effects of torsional-to-vertical natural frequency ratio on the aerodynamic and dynamic properties of bridge decks. The natural frequency ratios tested were around 2.2:1 and 1.2:1 respectively, with the fundamental vertical natural frequency held constant for all the tests. Two 2.9 m long sectional bridge models, one simulating the cross-section of a twin-deck bridge with a gap-width to total chord ratio of about 16% and the other with zero gap-width to approximate a thin plate, were tested to determine whether the effects of frequency ratio are similar for bridge decks with different cross-section shapes. The results of wind tunnel tests suggest that for the model with zero gap-width, the flutter derivatives are relatively independent of the torsional-to-vertical frequency ratio for a relatively large range of reduced wind velocities. However, for the model with a relative large gap-width (around 16%), the flutter derivatives are evidently dependent on the frequency ratio for most of the tested reduced velocities. A comparison of the modal damping ratios also suggests that the torsional damping ratio is much more sensitive to the frequency ratio, especially for the model with a 16% gap-width. The results of this investigation show that the torsional-to-vertical natural frequency ratio is an important structural parameter, which can significantly affect wind-structure interaction.
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Li, Ang, Jun Chen, Yangfan Liu, Stuart Bolton, and Patricia Davies. "Influence of Geometric Parameters on Aerodynamic and Acoustic Performances of Bladeless Fans." In ASME-JSME-KSME 2019 8th Joint Fluids Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/ajkfluids2019-5220.

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Abstract In recent years, the bladeless fan that does not have visible impellers have been widely applied in household appliances. Since the customers are particularly sensitive to noise and the strength of wind generated by the fan, the aerodynamic and acoustic performances of the fan need to be accurately characterized in the design stage. In this study, computational fluid dynamic (CFD) and computational aeroacoustics (CAA) are applied to investigate the performances of different designs of a bladeless fan model. The influence of four parameters, namely the airfoil selection for cross-section of the wind channel, the slit width, the height of cross-section and the location of the slit, is investigated. The results indicate the streamwise air velocity increases significantly by narrowing the outlet, but the noise level increases simultaneously. In addition, the generated noise increases while the height of fan cross-section increases, and a 4mm height of the cross section is optimal for aerodynamic performance. When the slit is closer to the location of maximum thickness, the performances of the bladeless fan increases. Moreover, the performance is not changed significantly by changing the cross-sectional profile. Finally, the optimal geometric parameters are identified to guide the future design of the bladeless fan.
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Khanna, Vivek K., Uri Vandsburger, William R. Saunders, and William T. Baumann. "Dynamic Analysis of Swirl Stabilized Turbulent Gaseous Flames." In ASME Turbo Expo 2002: Power for Land, Sea, and Air. ASMEDC, 2002. http://dx.doi.org/10.1115/gt2002-30061.

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With the advent of lean premixed gas turbine combustors, research in the area of thermo-acoustic instabilities and active combustion control came into the limelight. To be able to predict and control these instabilities, it is required that both the acoustics of the system, and a frequency-resolved response of the combustion process to velocity perturbations be understood. Experimental techniques developed by the Virginia Active Combustion Control Group at Virginia Tech, to obtain an open loop flame transfer function were applied to both fully and partially premixed swirl stabilized turbulent gaseous flames using commercial grade methane as fuel. A frequency-resolved fluctuating velocity was applied at the inlet of the combustor within the frequency range of 20–400 Hz, and the OH* chemiluminescence was used as a measure of the fluctuating heat release rate within the flame. Experiments were conducted at atmospheric pressure for two swirl numbers of 0.79 and 1.19, and three equivalence ratios of 0.55, 0.60 and 0.65. The flow rates studied resulted in Reynolds numbers of 14,866 and 19,821. The results show that for the linear range, the magnitude of the FRF is primarily dependent on the premixing quality and the mean energy content of the mixture, while the phase of the FRF is quite sensitive to Φ′ oscillations and to the variations in the species concentration across the cross-section of the flow.
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Sui, Ping C. "Tribological Characteristics of a Dynamic O-Ring in Abrasive Environment." In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-63190.

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A rotary seal tester simulating the abrasive down-hole environment was used to investigate the sealing, friction, and wear performance of the selected, “rubber” seal material molded into an o-ring configuration. Dynamic frictional torque and surface temperature within the sealing region were measured throughout the test duration. Test results indicate that the seal surface temperature is very sensitive to the variation of frictional torque. The average surface temperature is almost linearly proportional to the average frictional torque. Wear phenomena on the post-test sample surfaces were recorded by a surface profilometer. Observations showed that abrasive wear constantly produces a deep wear scar at the front, sealing edge of the journal surface. Furthermore, the reduction in seal cross-sectional diameter was found to be inversely proportional to the depth of the wear scar.
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Ilstad, Trygve, Tore So̸reide, and Finn Gunnar Nielsen. "Fatigue Calculations of Multi-Mode VIV." In ASME 2005 24th International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2005. http://dx.doi.org/10.1115/omae2005-67540.

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Pipelines on undulating seabed may be subject to free-span areas where interaction between VIV response of several modes occurs, including both single and multi-spans. Within the project Ormen Lange a model test program, as completed in 2004, was performed to investigate this phenomena. The implementation of the test results into detail design went via an Ormen Lange specific design guideline in which the general analysis flow is given. However, taking the mode interaction effects from the tests into the actual routing makes the need for additional evaluations and generalisation on dynamic system of interacting spans. A dynamic system represents a set of spans were the eigenmodes interact physically and not only mathematically in computation of the eigenmodes over a long pipeline section. For a single span case we find that the modes are well separated while for multi-span problems modes are close in frequencies. A clear criterion and limitation on dynamic system to be considered becomes vital. The relative effect of inline and cross flow VIV in actual design depends on the SN-curves at hand. The general trend is that inline generated fatigue takes over for corrosion sensitive problems covering operation phase, whereas preliminary phases may be governed by cross flow response. The modelling of pipe-soil interaction at shoulders is vital for the multi-span response characteristics, the experience being that softer soil gives minor span interaction. The soft soil gives deeper pipeline penetration and more uniform support stiffness all along the shoulder than the hard soil for which local reactions occur more like pinned supports.
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Zimmermann, Charles, Richard James, Blaise Seguin, and Mattias Lynch. "Hydrodynamic Properties of an Asymmetric Deepwater Riser Bundle." In 25th International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2006. http://dx.doi.org/10.1115/omae2006-92469.

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The BP operated Greater Plutonio field development offshore Angola comprises a spread-moored FPSO in 1,300 m water depth, serving as a hub processing the fluids produced from or injected into the subsea wells. The selected riser system is a riser tower tensioned by a steel buoyancy tank at its top end and distributed foam buoyancy along a central structural tubular. The riser bundle is asymmetric in cross-section and this paper presents the work performed to determine the specific hydrodynamic characteristics of the design. Both basin tests and CFD analysis results are presented with discussion on some specific hydrodynamic issues: vortex-induced vibration (VIV) of the global riser tower system, VIV of individual risers, and the dynamic stability of the global system (i.e. galloping). Finally, guidelines for the assessment of the hydrodynamic behaviour of such system geometries are proposed. The results of this paper demonstrate that the Greater Plutonio riser bundle represents an effective solution in term of hydrodynamic behaviour and is not sensitive to VIV fatigue or galloping.
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Shao, Xuejiao, Hai Xie, Furui Xiong, Xiaolong Fu, Kaikai Shi, and Xiaohuan Yu. "Comparative Study on the Nonlinear Calculation of Ratcheting Deformation Using Different Constitutive Model." In ASME 2020 Pressure Vessels & Piping Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/pvp2020-21182.

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Abstract In the fatigue assessment of nuclear components following the RCC-M B3200, if the results using the simplified elastic-plastic method cannot meet the Code’s requirements, it is necessary to conduct a detailed elastic-plastic fatigue analysis of the component. In this paper, the A-F and Chaboche nonlinear kinematic hardening constitutive models are used to conduct an elasto-plastic fatigue analysis for a typical nozzle component, aiming to calculate the secondary cumulative cyclic plastic strain of the structure induced by the rapid temperature change transient. The calculation method of nonlinear ratcheting behavior under cyclic loading is studied. The method of determining the parameters of constitutive model based on cyclic stable stress-strain curve is also studied. A sensitive study of the parameters for the same constitutive law is presented, including the results of cumulative plastic strain. The ratcheting behavior simulation calculated by different constitutive models are compared. The results show that the A-F model has a conservative prediction of ratcheting behavior as the dynamic recovery term is too strong. It was found that the Chaboche constitutive model is the better methodology for ratcheting analysis. In order to evaluate the bearing ability of the section, the membrane strain and bending strain is obtained by linearizing the node strain along the cross section. The ratios of membrane strain and membrane plus bending strain to total strain are calculated, which is helpful to determining the limit criteria for the cumulative strain of structures.
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Lalonde, V., A. Ross, M. J. Pettigrew, and I. Nowlan. "Experimental Study of Dynamic Interaction Between a Steam Generator Tube and an Anti-Vibration Bar." In ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2010. http://dx.doi.org/10.1115/fedsm-icnmm2010-31017.

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A first experimental work was previously carried out to study the dynamic behavior of a tube simply supported at both ends in interaction with an anti-vibration bar at mid-span. This paper presents modifications to the previous setup with the aim of improving the accuracy of the results. A comparison of the dynamic behavior of the tube is made between both setups. The objective of this experimental study is to characterize the vibration behavior of U-tubes found in steam generators of nuclear power plants. Indeed, two-phase cross-flow in the U-tubes section of steam generators can cause many problems related to vibration. In fact, flow-induced vibration of the U-tubes can cause impacts or rubbing of the tubes against their flat bar supports. Variation of the clearance between the AVB and the U-tubes may lead to ineffective supports. The resulting in-plane and out-of-plane motions of the tubes are causing fretting-wear and impact abrasion. In this study, the clearance between the tube and the AVB, as well as the amplitude, form and frequency of the excitation force are controlled parameters. The first two modes of the tube are studied. The modifications made to the setup lead to significant improvements in the results. The natural frequencies of both setups are compared to theoretical values. The difference between experimental and theoretical frequencies confirms that the new setup better represents the theoretical model of a simply supported tube. The damping of both setups is also compared to values found in literature. The results show that the new setup is more representative of realistic steam generator situations. Compared to the first setup, the displacements of the new setup clearly indicate that the movement of the tube is mostly parallel to the flat bar and in the same direction as the excitation force. The whirling motion of the tube is prevented in the new setup. The accuracy of the contact force as a function of clearance was also improved. The use of more sensitive force sensors helped to reduce the noise level of the contact force. Finally, the dynamic interaction between the tube and the AVB, defined by the fretting wear work-rate, presents a more consistent behavior. The maximum work-rate occurs when the tube is excited around the second mode for clearance between −0.10 and 0.00 mm. Such clearance between the tube and the AVB should then be avoided to minimize fretting damage.
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Reports on the topic "Dynamic sensitive cross section"

1

Doan, Larry, Patrick A. Day, and Oleg Brovko. Large Dynamic Range Radar Cross Section Parallel Tracking. Fort Belvoir, VA: Defense Technical Information Center, October 1995. http://dx.doi.org/10.21236/ada304014.

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Crocker, Dylan. A File Format and API for Dynamic Radar Cross Section Data. Office of Scientific and Technical Information (OSTI), September 2020. http://dx.doi.org/10.2172/1664641.

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Benedetti, G. A. Dynamic stability of a spinning tube conveying a fluid through a symmetrical noncircular cross-section. Office of Scientific and Technical Information (OSTI), November 1990. http://dx.doi.org/10.2172/6424482.

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PENNSYLVANIA STATE UNIV UNIVERSITY PARK. Radar Cross Section (RCS) Certification for Static and Dynamic RCS Measurement Facilities, Volume 1-Certification Process. Fort Belvoir, VA: Defense Technical Information Center, January 2001. http://dx.doi.org/10.21236/ada385420.

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NATIONAL INSTITUTES OF HEALTH BETHESDA MD. Radar Cross Section (RCS) Certification for Static and Dynamic RCS Measurement Facilities. Volume II - DoD RCS Demonstration Program Results. Fort Belvoir, VA: Defense Technical Information Center, March 2001. http://dx.doi.org/10.21236/ada385414.

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Berney, Ernest, Naveen Ganesh, Andrew Ward, J. Newman, and John Rushing. Methodology for remote assessment of pavement distresses from point cloud analysis. Engineer Research and Development Center (U.S.), April 2021. http://dx.doi.org/10.21079/11681/40401.

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The ability to remotely assess road and airfield pavement condition is critical to dynamic basing, contingency deployment, convoy entry and sustainment, and post-attack reconnaissance. Current Army processes to evaluate surface condition are time-consuming and require Soldier presence. Recent developments in the area of photogrammetry and light detection and ranging (LiDAR) enable rapid generation of three-dimensional point cloud models of the pavement surface. Point clouds were generated from data collected on a series of asphalt, concrete, and unsurfaced pavements using ground- and aerial-based sensors. ERDC-developed algorithms automatically discretize the pavement surface into cross- and grid-based sections to identify physical surface distresses such as depressions, ruts, and cracks. Depressions can be sized from the point-to-point distances bounding each depression, and surface roughness is determined based on the point heights along a given cross section. Noted distresses are exported to a distress map file containing only the distress points and their locations for later visualization and quality control along with classification and quantification. Further research and automation into point cloud analysis is ongoing with the goal of enabling Soldiers with limited training the capability to rapidly assess pavement surface condition from a remote platform.
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7

Uncertainty analysis procedures for dynamic radar cross section measurements at the Atlantic Test Range. Gaithersburg, MD: National Institute of Standards and Technology, 1998. http://dx.doi.org/10.6028/nist.ir.5073.

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