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Готові списки джерел за темами / Dynamical characteristic curve

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Добірка наукової літератури з теми "Dynamical characteristic curve"

Автор: Grafiati

Опубліковано: 3 червня 2025

Оновлено: 31 липня 2025

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Статті в журналах з теми "Dynamical characteristic curve"

1

Zhang, Qiaoyu, and Jianjun Liu. "Flow boiling instabilities of nitrogen in horizontal small diameter tube." MATEC Web of Conferences 189 (2018): 06010. http://dx.doi.org/10.1051/matecconf/201818906010.

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The flow boiling instability characteristics of nitrogen flow boiling in a horizontal small diameter tube were numerically studied, and a numerical model coupled with two phase flow boiling and system flow supplying was developed. With the steady state solution of the model, the flow boiling characteristic curve and flow supplying curve were obtained. The flow boiling characteristic curve was affected by the heat flux and inlet subcooling, meanwhile the flow supplying curve was affected by the total system pressure drop and friction feature of the flow supplying section. With the transient sol

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2

Men, Jin Jie, Qing Xuan Shi, and Qi Zhou. "Inter-Story Capacity Spectrum for the Performance Based Seismic Design of Vertically Irregular RC Frame Structures I: Method." Key Engineering Materials 517 (June 2012): 745–48. http://dx.doi.org/10.4028/www.scientific.net/kem.517.745.

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Considering the dynamical characteristic of structure under different earthquake hazard level, inelastic demand curves, namely, inter-story shear versus inter-story displacement curve are established by using mode spectrum method. Based on the relation of structure performance object and displacement ductibility, the relation of structure performance object and inter-story demand curve is established. And the inter-story demand curves take into account the inelastic behavior of structure under earthquake action adequately. Then considering the seismic respond characteristic and the capacity cu

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3

Liu, Yang, Da Wang, and Min Hai Chen. "Seismic Response Analysis of Partial Curve Long-Span Rigid Frame Bridge with Super High Pier." Advanced Materials Research 308-310 (August 2011): 1314–21. http://dx.doi.org/10.4028/www.scientific.net/amr.308-310.1314.

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Based on the time history analysis method, some curve long-span rigid frame bridge with super high pier in Sichuan was taken as the studying case, and a studying of natural vibration characteristics and seismic response. Comparative study was emphasis carried on seismic performance between the partial curve bridge and the straight. In addition, the exhaustive research to about between crosswise relation to the structure overall rigidity contribution and to the structure and the seismic performance influence is conducted. The conclusion of the study shows that the seismic performance of the str

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4

Jalnine, Aleksej. "On invariant manifolds of stable trajectories in quasiperiodically forced nonlinear dynamical systems." Izvestiya VUZ. Applied Nonlinear Dynamics 8, no. 3 (2000): 17–26. http://dx.doi.org/10.18500/0869-6632-2000-8-3-17-26.

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In terms of the quasiperiodically driven Henon map we show that two—dimensional stable invariant manifolds of the nodal invariant curve of а smooth invertible three—dimensional map can possess both differentiable and fractal structure. The fractalization of manifolds precedes the destruction of a smooth invariant curve and the birth of а strange nonchaotic attractor in modeling system. An observation of the angle between manifolds along trajectories that belong to the invariant curve after its manifolds fractalization and the strange nonchaotic attractor shows аn existence оf tangencies of the

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5

Saka, Takashi. "Properties of X-ray resonant scattering in the Bragg case revealed on the Riemann surface." Acta Crystallographica Section A Foundations and Advances 72, no. 4 (2016): 472–79. http://dx.doi.org/10.1107/s2053273316005404.

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Continuing the work described in the previous paper [Saka (2016).Acta Cryst.A72, 338–348], the dynamical theory for perfect crystals in the Bragg case is reformulated using the Riemann surface. In particular, diffraction under resonant scattering conditions is investigated. The characteristic features of the dispersion surface and the rocking curve are analytically revealed using four parameters, which are the real and imaginary parts of two quantities specifying the degree of departure from the exact Bragg conditions and the reflection strength. Characteristic properties that have been deduce

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6

Ehret, Uwe, and Pankaj Dey. "Technical note: Complexity–uncertainty curve (c-u-curve) – a method to analyse, classify and compare dynamical systems." Hydrology and Earth System Sciences 27, no. 14 (2023): 2591–605. http://dx.doi.org/10.5194/hess-27-2591-2023.

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Abstract. We propose and provide a proof of concept of a method to analyse, classify and compare dynamical systems of arbitrary dimensions by the two key features uncertainty and complexity. It starts by subdividing the system's time trajectory into a number of time slices. For all values in a time slice, the Shannon information entropy is calculated, measuring within-slice variability. System uncertainty is then expressed by the mean entropy of all time slices. We define system complexity as “uncertainty about uncertainty” and express it by the entropy of the entropies of all time slices. Cal

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7

Zelik, Sergey V., Olga V. Pochinka, and Andrey A. Yagilev. "On the Minkowski dimension of some invariant sets of dynamical systems." Zhurnal Srednevolzhskogo Matematicheskogo Obshchestva 26, no. 1 (2024): 32–43. http://dx.doi.org/10.15507/2079-6900.26.202401.32-43.

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Abstract. It is well known that a fractal set is not a submanifold of the ambient space. However, fractals arise as invariant subsets even in infinitely smooth conditions and the Minkowski dimension serves in this case as a characteristic of complexity of this scale. For example, when the equilibrium state during the Andronov-Hopf bifurcation losses its stability, the closure of the non-singular trajectory is a parametrically defined curve of the fractal type. In this work the fractal dimension of such curves is calculated. In addition, special two-parameter family of functions is studied such

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8

Pan, Hong Xia, and Jin Ying Huang. "Testing-Point Optimizing Technology Based on PSO in Fault Diagnosis." Advanced Materials Research 181-182 (January 2011): 60–65. http://dx.doi.org/10.4028/www.scientific.net/amr.181-182.60.

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In this paper, for such a complex dynamical system as gear box, the transfer characteristic model of different excitation points and responsive points is constructed. Considering the actual condition that the vibration signals from different parts the inner gear box arrive in the box’ surface by different paths and mutual mixes, the basic method on sensor optimization and testing-point configuration based on PSO is put forward for fault detection. Through the testing analysis of every point’s transfer characteristic curve and the optimization of the transfer characteristic parameters, it is no

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9

Grib, Alexander, and Olena Chykina. "The IV-characteristic of the long josephson junction at the zero-field step." Low Temperature Physics 50, no. 11 (2024): 970–75. http://dx.doi.org/10.1063/10.0030413.

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The influence of Josephson vortices on the formation of the first zero-field step is investigated theoretically by two methods. The first method is based on the numerical solution of the dynamical equations. The spatial distribution of the critical currents along the junction has a small irregularity of 10–3% at an arbitrary location, which allows the formation of zero-field steps in the IV-characteristic. The periodic motion of Josephson vortices in the junction is studied in detail using the first method. The IV-curve and the Josephson penetration depths of the magnetic field for different v

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10

Yang, Yang, Jianhui Lan, Bo Liang, et al. "Molecular Dynamics Simulations of Metal Electrode/Molten LiCl-KCl-UCl₃ Mixtures Interface." Journal of The Electrochemical Society 169, no. 3 (2022): 032503. http://dx.doi.org/10.1149/1945-7111/ac579a.

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The structural and dynamical properties of the interface between metal electrode/molten LiCl-KCl-UCl3 mixtures were studied through constant charge molecular dynamics simulation. We observed a layered structure of the metal electrode/molten LiCl-KCl-UCl3 mixtures interface composed by multiple layers of anions and cations. The distribution of U3+ at the interface was ordered, and the increase of electrode charges promoted this ordered interfacial distribution. The differential capacitance curve was a flattened and bell-like shape with the maximum at a negative surface charge due to the charact

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Дисертації з теми "Dynamical characteristic curve"

1

Ramsey, Michael W., G. Gregory Haff, Ann M. Kinser, et al. "Isometric and Dynamic Force-time Curve Characteristics of Collegiate Throwers." Digital Commons @ East Tennessee State University, 2007. https://dc.etsu.edu/etsu-works/4099.

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2

van, Quang Pham. "Soil formation and soil moisture dynamics in agriculture fields in the Mekong Delta, Vietnam conceptual and numerical models." Licentiate thesis, KTH, Land and Water Resources Engineering, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-10508.

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<p>Previous studies of agricultural conditions in the Mekong Delta (MD) have identified soil compaction as an obstacle to sustainable production. A conceptual model for soil formation was presented to demonstrate the link between soil hydrology and plant response. Detailed studies of soil moisture dynamics in agricultural fields were conducted using a dynamic process-orientated model. Pressure head and water flow were simulated for three selected sites during a year for which empirical data were available. Daily meteorological data were used as dynamic input and measured pressure head was used

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3

Kim, Yeonsu. "Probabilistic Estimation of River Discharge Considering Channel Characteristics Uncertainty with Particle Filters." 京都大学 (Kyoto University), 2013. http://hdl.handle.net/2433/180482.

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4

Fogal, Marcelo Luiz Freitas. "Estudo teórico e experimental das curvas características de um ventilador axial aplicado em pulverização agrícola /." Bauru : [s.n.], 2009. http://hdl.handle.net/11449/91719.

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Orientador: Alcides Padilha<br>Banca: Ivan De Domenico Valarelli<br>Banca: Kamal Abdel Radi Ismail<br>Resumo: Neste trabalho apresenta-se uma análise teórica e experimental dos resultados comparativos entre as curvas características de um ventilador axial utilizado em um sistema de pulverização agrícola para um ângulo de ataque da pá em 32 graus nas rotações de 1500, 1750, 2600 e 3000 rpm e resultados numéricos da influência da variação do ângulo de ataque da pá em 28, 32 e 36 graus e da otimização do sistema de pulverização ambos para uma rotaç]ao de 2600 rpm. O campo médio turbulento foi obt

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5

Fogal, Marcelo Luiz Freitas [UNESP]. "Estudo teórico e experimental das curvas características de um ventilador axial aplicado em pulverização agrícola." Universidade Estadual Paulista (UNESP), 2009. http://hdl.handle.net/11449/91719.

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Made available in DSpace on 2014-06-11T19:25:27Z (GMT). No. of bitstreams: 0 Previous issue date: 2009-11-06Bitstream added on 2014-06-13T18:26:31Z : No. of bitstreams: 1 fogal_mlf_me_bauru.pdf: 1973940 bytes, checksum: 7fa4d89826d2cfb9214807f1ec353036 (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>Neste trabalho apresenta-se uma análise teórica e experimental dos resultados comparativos entre as curvas características de um ventilador axial utilizado em um sistema de pulverização agrícola para um ângulo de ataque da pá em 32 graus nas rotações de 1500, 1750,

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6

Yang, Fu-Chiang, and 楊富強. "The Characteristic of Total Cost Curve in the Dynamic Lot-Sizing of Supply Chain." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/97192328033545092545.

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碩士<br>國立高雄應用科技大學<br>工業工程與管理系碩士班<br>95<br>The products are manufactured through multi-stages in supply chain, computing the minimum total costs of purchase or production is a multilevel dynamic lot-sizing problem. In the past literatures, the lot-sizing problem of large complex product structures has been proved to be an NP-complete problem. The literatures adopt heuristic approach to overcome the shortage of computer’s main memory when the lot-sizing problems are more than 50 operation levels and 24 planning periods. This paper develops a binary algorithm to generate all the feasible solutions

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Книги з теми "Dynamical characteristic curve"

1

Camelo, Vanessa. Dynamic characteristics of woodframe structures (CUREE publication). Consortium of Universities for Research in Earthquake Engineering, 2002.

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2

Holland, John H. 2. Complex physical systems (CPS). Oxford University Press, 2014. http://dx.doi.org/10.1093/actrade/9780199662548.003.0002.

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‘Complex physical systems’ considers the characteristics of complex physical systems (CPS), which are often geometric (specifically, lattice-like) arrays of elements, in which interactions typically depend only on effects propagated from nearest neighbors. The elements of a CPS follow fixed physical laws, usually expressed by differential equations—Newton’s laws of gravity and Maxwell’s laws of electromagnetism are cases in point. Neither the laws nor the elements change over time; only the positions of the elements change. CPS show several properties: self-organized criticality, self-similari

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3

Plastics in Automotive Engineering 2016. VDI Verlag, 2016. http://dx.doi.org/10.51202/9783182443438.

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The lightness of design Lines and curves make the pavilion a dynamic and trimmed sculpture whose characteristics derive from the brand image of the vehicle manufacturer. Uniform, matt stainless steel sheets wrap the body shell seamlessly. In a similar way to monocoque design, which is used in lightweight construction in the automotive and aircraft industries, the space-creating shell of the building takes over the load-bearing function. A total of 620 stainless steel covering sheets with welded-on stiffening ribs were prefabricated in a shipyard in Stralsund and assembled on site Table of cont

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4

Surveys on Recent Developments in Algebraic Geometry. American Mathematical Society, 2017.

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Частини книг з теми "Dynamical characteristic curve"

1

Dlouhý, I., G. B. Lenkey, and M. Holzmann. "Master Curve Validity for Dynamic Fracture Toughness Characteristics." In Transferability of Fracture Mechanical Characteristics. Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-010-0608-8_17.

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2

Font, Joaquim, and Miquel Grau. "Non Local Spiraling Characteristic Curves." In Long-Term Dynamical Behaviour of Natural and Artificial N-Body Systems. Springer Netherlands, 1988. http://dx.doi.org/10.1007/978-94-009-3053-7_36.

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3

Font, Joaquim, and Carles Simó. "Are there Irregular Families of Characteristic Curves?" In Predictability, Stability, and Chaos in N-Body Dynamical Systems. Springer US, 1991. http://dx.doi.org/10.1007/978-1-4684-5997-5_48.

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4

Zhou, Jie, Haowen Mou, Junchao Gao, and Xueping Chang. "Vibration and Stability Analysis of Functionally Gradient Flow Pipe with Axial Motion." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-4355-1_4.

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AbstractThe axially moving functionally graded pipe is widely used in many fields of industry, and its vibration and stability analysis is the key to its design. In this paper, the vibration characteristics and stability of functionally graded pipes with axial motion are analyzed. Based on the extended Hamilton variational principle, the dynamic equation of the pipe with internal flow velocity, material volume fraction index and axial velocity is established. The modified Galerkin method is used to solve the dynamic equation. The influence of the internal flow velocity, material volume fractio

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5

Lind Jonsson, Oskar, Arvind Balachandran, Jian Zhou, Björn Olofsson, and Lars Nielsen. "Investigating Characteristics and Opportunities for Rear-Wheel Steering." In Lecture Notes in Mechanical Engineering. Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-70392-8_22.

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AbstractThe potential of additional steering possibilities (like rear-wheel or all-wheel steering) is analyzed for critical situations to investigate possible safety improvements. For this purpose, a dynamic optimization problem is formulated to find the best possible maneuver. The optimization criterion is to maximize the entry speed into a constant radius $$90^\circ $$ 90 ∘ -curve. The optimization problem is solved for different steering topologies, and the results quantify the increase in maximum entry speed, highlighting the potential for safety improvements. Further, the optimal steering

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6

Fu, Yu, Siyuan Qiu, Zhifu Yu, Juan Su, and Xiaomeng Hou. "Damage Assessment of RPC Strengthened RC Columns Subjected to Blast Loading." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-4090-1_43.

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AbstractIn our country, there are 60 billion square meters of existing leasable area, reactive powder concrete (RPC) has the characteristics of high toughness and high strength-to-weight ratio. RPC strengthened concrete (RC) forms RPC-RC structure, it is an important way for sustainable development of civil engineering to improve the anti-explosion ability of building structure while strengthening and reforming the structure. The dynamic response and damage assessment methods of RPC-RC columns subjected to blast loading are not clear. In order to solve this problem, the dynamic response of RPC

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7

Cao, Xuyang, Guoyang Xu, Yongchang Hu, Jihong Zhou, and Jian Kang. "Rigid-Flexible Coupling Dynamics Analysis of Boom-Hoisting System of Wind Power Crane." In Lecture Notes in Mechanical Engineering. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-1876-4_1.

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AbstractBased on the slenderness of wind power crane boom and the complexity of working environment, a mathematical model of rigid-flexible coupling dynamics including wind load and vibration characteristic analysis is carried out for the boom-hoisting system. The equivalent spring-damping system, spatial pendulum system and elastic double-force rod are used to simulate the elastic vibration of boom, the swing of lifting weight and the elastic vibration of wire rope, respectively. The kinematic characteristics of each component are described using a hybrid coordinate system. Simulation of wind

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8

Lu, Qi, Yongzhen Ma, Ganbin Liu, and Fuxin Ni. "Dynamic Characteristics Test and Microstructure Analysis of Silt Soil Improved by Curing Agent." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-4090-1_24.

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AbstractWith the acceleration of urbanization, the output of construction sludge and waste mud is increasing. Its transportation cost is high and there are potential safety hazards. Therefore, it is necessary to seek effective disposal and utilization methods. Aiming at the silt soil with high water content, the developed YB100 powder curing agent was used to improve the properties of silt soil, and the effects of dynamic properties and water stability of the cured soil were studied by curing agent dosing, surrounding pressure, and dynamic stress ratio. The microstructure of the cured soil was

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9

Lin, Qindong, Chun Feng, Yundan Gan, Jianfei Yuan, Wenjun Jiao, and Ying Yang. "Study of Difference in Dynamic Response of Underground Structure at Different Blast Angles." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2024. https://doi.org/10.1007/978-981-97-6238-5_32.

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AbstractThe dynamic response of underground structures under blast loading is of great military significance to strategically valuable targets, and the difference in the dynamic response of underground structures at different blast angles is investigated based on a FEM-DEM coupled method. First, a full-time numerical simulation under blast loading is carried out. Then, the displacement and fracture characteristics of the underground structure are analyzed quantitatively. The results indicate that the spatial distribution of displacement and initial fracture type is closely related to the posit

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10

Tan, Donglian, and Yue Zhao. "Seismic Fragility Analysis of Space Special-Shaped Steel Box Arch Bridge." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-4355-1_31.

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AbstractSeismic fragility analysis is of paramount significance in studying the seismic characteristics of bridges, especially for special structures like special-shaped bridges. Special-shaped bridges exhibit more complex geometric and mechanical properties. Therefore, it is even more essential to conduct seismic fragility analysis for special-shaped bridges. Analyzing the response of special structures to lateral seismic loads benefits the evaluation of their seismic performance and facilitates enhancements in seismic design. A finite element model was established using Midas/Civil to invest

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Тези доповідей конференцій з теми "Dynamical characteristic curve"

1

Gallegos-Cantú, Sergio, D. Scott MacKenzie, and Bernardo Hernández-Morales. "Cooling Curve Analysis of a PAG Polymer Quenchant Using Two Spray Quench Rings Designs." In IFHTSE 2024. ASM International, 2024. http://dx.doi.org/10.31399/asm.cp.ifhtse2024p0201.

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Abstract The analysis of cooling curves obtained by immersing a probe in the quench medium has been widely used since its availability. For instance, methods described in standards such as ISO 9950 and ASTM D 6482 refer to the use of an Inconel 600 specimen which is quenched to obtain the cooling curve of a given fluid; however, spray quenching is being mostly used in induction hardening processes. In this work, the quenching characteristics of a PAG polymer at 6 and 12 % concentration were determined and compared with water as a baseline. The fluid was heated at 30 °C, while the solution flow

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2

Jiang, Jun Xiang, and Lei Ke. "Numerical Simulation Analysis of Dynamic Performance of Magnetically Coupled Monostable Piezoelectric Energy Harvester Device." In 12th Annual International Conference on Material Science and Engineering. Trans Tech Publications Ltd, 2025. https://doi.org/10.4028/p-j2bsvo.

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To meet the energy needs of devices such as wireless sensor networks and MEMS systems，improve the adaptability of piezoelectric energy harvester, this paper studies a two-degree-of-freedom(2-DOF) monostable piezoelectric energy harvester based on magnetic. The electromechanical coupling dynamics equation of the 2-DOF monostable system is established. The dynamic equation is solved by harmonic balance method. The output of dimensionless amplitude-frequency curves of a 2-DOF monostable piezoelectric system in the first and second order resonances is simulation analyzed. The results show that the

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3

Bauchau, Olivier A., and Jielong Wang. "Stability Analysis of Complex Multibody Systems." In ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/detc2005-84490.

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The linearized stability analysis of dynamical systems modeled using finite element based multibody formulations is addressed in this paper. The use of classical methods for stability analysis of these system, such as the characteristic exponent method or Floquet theory, results in computationally prohibitive costs. Since comprehensive multibody models are “virtual prototypes” of actual systems, the applicability to numerical models of the stability analysis tools that are used in experimental settings is investigated in this work. Various experimental tools for stability analysis are reviewed

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4

Krass, Brady J., and Ishwar K. Puri. "Air Staging and Swirl-Assisted Mixing and Combustion of Methane and Air." In ASME 1996 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1996. http://dx.doi.org/10.1115/imece1996-0184.

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Abstract Two-stage combustors offer an effective method for the suppression of combustion-generated pollutants. The imposition of swirl on the fuel and/or oxidizer flows causes recirculation which enhances mixing that in turn reduces NOx (i.e., total nitrogen oxide) formation. We investigate the characteristics of a burner that allows for both good mixing through swirl, and staging. Temperature measurements establish the presence of separate rich and lean zones during staging. Relative uniformity of the temperature profiles, and small magnitudes of temperature fluctuations are characteristic o

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5

Mawasha, P. Ruby, Omotoye Omotoso, Paul Lam, and Ted Conway. "Dynamic Model and Analysis of a Centrifugal Blood Pump and Induction Motor." In ASME 2001 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/imece2001/bed-23133.

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Abstract A dynamic model of a centrifugal blood pump, induction motor, and channel is investigated through nonlinear analysis. A centrifugal blood pump with forward curved blades and an induction motor is subject to constant inlet and outlet mass flow conditions leading to a channel. The steady state pressure drop versus volumetric flow rate relation is described by a constitutive model containing a cubic nonlinearity obtained from centrifugal pump characteristic curves. Within certain operating regimes along the characteristic curve, the model exhibits self-excited pulsatile periodic morion a

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6

Butzhamme, L. "Dynamic conformity assessment for joining force monitoring using Bayes filters." In Sheet Metal 2023. Materials Research Forum LLC, 2023. http://dx.doi.org/10.21741/9781644902417-48.

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Abstract. Monitoring force-displacement or force-time curves is a widely used quality control technique in the field of mechanical joining. For online monitoring of self-piercing riveting, envelope curves are often used to define a tolerance zone for the measured setting force. However, the measurement uncertainty is typically not considered and the force curve of a joint can be wrongly rated as non-conform due to measurement errors and noise. In this article, we present a method for dynamical online filtering and uncertainty determination for noisy force curves using two types of Bayesian fil

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Marger, Thibaut, Valerie Pommier-Budinger, J. Charles Mare, and Franc¸ois Malburet. "Managing the Hydraulic Characteristics of Control Spool Valves Through Simplified Manufacturing Process." In ASME 2009 Dynamic Systems and Control Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/dscc2009-2611.

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This communication proposes an original method to define a low-cost manufacturing process for hydraulic spool valves in the case of very low production rate. A valve is usually completely defined by three characteristic curves obtained by two tests: a pressure gain test and a flow gain test. The aim is to limit the number of tests and in particular to avoid the flow gain test that is quite long to achieve. The method only uses a single metrology operation and the pressure gain curve to manage the spool flanks grinding while ensuring the specified hydraulic characteristics. The method is establ

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Zhang, Fengyuan, Yang Pan, Zhenhua Rui, et al. "A Two-Phase Type-Curve Method with Fracture Damage Effects for Hydraulically Fractured Reservoirs." In SPE Annual Technical Conference and Exhibition. SPE, 2023. http://dx.doi.org/10.2118/215034-ms.

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Abstract Type-curve analysis on flowback and production data is a powerful tool in characterizing hydraulic fractures (HF) and reservoir properties. In order to evaluate HF characteristics and their dynamics for multi-fractured horizontal wells (MFHWs) in hydrocarbon reservoirs, we provide a novel type-curve method and an iterative workflow. The type curve incorporates the fracture damage effect, which is characterized by choked-fracture skin factor, into the two-phase flow in HF and matrix domains. The type-curve method can be applied to inversely estimate choked-fracture skin factor, fractur

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Hiradate, Kiyotaka, Kiyohide Sakamoto, Yasushi Shinkawa, Satoshi Joukou, and Takeshi Uchiyama. "Investigation on Pressure Fluctuation Related to Mild Surge in Multi-Stage Centrifugal Blower With Inlet Guide Vane." In ASME Turbo Expo 2015: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/gt2015-43034.

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Centrifugal blowers are widely used for gas compression in various industrial fields. Wider operating range is required in these machines. Investigations on the generation mechanism of unsteady flow (i.e., surge) are very important to improve the operating range of these machines. Purpose of this study is to clarify the generation mechanism of pressure fluctuations in a multi-stage centrifugal blower equipped with inlet guide vanes (IGVs) upstream of the first stage under the IGVs partially open condition. These pressure fluctuations occur at flowrates when the slope of total system head curve

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Kwark, Sang M., Ratan Kumar, Gilberto Moreno, and Seung M. You. "Transient Characteristics of Pool Boiling Heat Transfer in Nanofluids." In ASME 2009 Second International Conference on Micro/Nanoscale Heat and Mass Transfer. ASMEDC, 2009. http://dx.doi.org/10.1115/mnhmt2009-18529.

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This study shows the transient characteristics of the pool boiling curves using nanofluid as the boiling fluid. This time-dependency is in sharp contrast to a unique steady-state pool boiling curve that is typically obtained for a pure fluid. Past researches on nanofluids have provided several interesting information about the thermal characteristics for this potentially promising cooling fluid. Results from these studies have shown some extraordinary critical heat flux (CHF) values and thermal conductivity enhancement that is yet to be explained by existing theories and correlations. The natu

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Звіти організацій з теми "Dynamical characteristic curve"

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Jittapiromsak, Nutchawan. Value of Dynamic Contrast-Enhanced Magnetic Resonance Imaging for Determining the Plasma Epstein-Barr Virus Status and Staging of Nasopharyngeal Carcinoma. Faculty of Medicine, Chulalongkorn University, 2019. https://doi.org/10.58837/chula.res.2019.9.

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Objective: To determine the associations between dynamic-contrast enhanced (DCE) magnetic resonance imaging (MRI) parameters and plasma Epstein-Barr virus (EBV) DNA status and nasopharyngeal carcinoma (NPC) stages. Methods: We prospectively studied the DCE MRI results of 47 patients with newly diagnosed NPC and a known pre-treatment plasma EBV DNA level. Regions of interest (ROIs) were drawn at primary tumors, and DCE MRI parameters, including mean and max values of Ktrans, Kep Ve, and Vp, were recorded. Spearman’s rank correlation was used to identify significant associations between DCE MRI

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Torres, Marissa, Michael-Angelo Lam, and Matt Malej. Practical guidance for numerical modeling in FUNWAVE-TVD. Engineer Research and Development Center (U.S.), 2022. http://dx.doi.org/10.21079/11681/45641.

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This technical note describes the physical and numerical considerations for developing an idealized numerical wave-structure interaction modeling study using the fully nonlinear, phase-resolving Boussinesq-type wave model, FUNWAVE-TVD (Shi et al. 2012). The focus of the study is on the range of validity of input wave characteristics and the appropriate numerical domain properties when inserting partially submerged, impermeable (i.e., fully reflective) coastal structures in the domain. These structures include typical designs for breakwaters, groins, jetties, dikes, and levees. In addition to p

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Bajwa, Abdullah, Tim Kroeger, and Timothy Jacobs. PR-457-17201-R04 Residual Gas Fraction Estimation Based on Measured Engine Parameters - Phase IV. Pipeline Research Council International, Inc. (PRCI), 2021. http://dx.doi.org/10.55274/r0012176.

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Based on experimental characterization of the scavenging behavior of a cross-scavenged, piston-aspirated, two-stroke, natural gas engine in phase III of the current project, a computationally inexpensive simple scavenging model was improved in this phase. Experimental results using fast nondispersive infrared (NDIR) CO2 measurements from the cylinder and the exhaust, as well as experiments using unburned fuel pre-mixed in the scavenging chamber as a tracer for short-circuiting during scavenging, were used in this phase to validate the improved model. The model represents the fundamental phenom

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