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Dissertations / Theses on the topic 'Distributed-lumped'

Author: Grafiati

Published: 4 June 2021

Last updated: 8 February 2022

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1

Oh, Min. "Modelling and simulation of combined lumped and distributed processes." Thesis, Imperial College London, 1995. http://hdl.handle.net/10044/1/8197.

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2

Orellana, Bobadilla Barbara A. "Identification of lumped and semi-distributed conceptual rainfall runoff models." Thesis, Imperial College London, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.590036.

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Conceptual rainfall runoff (CRR) models usually require calibration to identify their parameter values, whereas their model structure is selected prior to modelling. Consid- erable efforts have been directed into calibration of lumped CRR models. Identification of the model structure on the basis of available data still remains unclear. The data-based mechanistic (DBM) approach does minimal assumptions of the model structure, which is identified using powerful statistic techniques. Moreover, there is a similarity between the CRR and DBM model.formulations. Based on this similarity, an integrat

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3

Perez, Javier Rodriguez. "A hybrid strategy for improved state estimation in nonlinear lumped and distributed parameter models." Thesis, Imperial College London, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.516501.

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4

Paudel, Murari. "An Examination of Distributed Hydrologic Modeling Methods as Compared with Traditional Lumped Parameter Approaches." BYU ScholarsArchive, 2010. https://scholarsarchive.byu.edu/etd/2219.

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Empirically based lumped hydrologic models have an extensive track record of use where as physically based, multi-dimensional distributed models are evolving for various engineering applications. Despite the availability of high resolution data, better computational resources and robust numerical methods, the usage of distributed models is still limited. The purpose of this research is to establish the credibility and usability of distributed hydrologic modeling tools of the United States Army Corps of Engineers (USACE) in order to promote the extended use of distributed models. Two of the USA

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5

VENTURINI, VIRGINIA. "A NEW METHODOLOGY TO INTEGRATE PARAMETERS IN LUMPED MODELS." University of Cincinnati / OhioLINK, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1006882648.

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6

Grobler, Andries Johannes. "Thermal modelling of a high speed permanent magnet synchronous machine / Andries J. Grobler." Thesis, North-West University, 2011. http://hdl.handle.net/10394/6528.

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Thermal modelling is of great importance in all electric machines but especially in permanent magnet synchronous machines (PMSMs). The thermally fragile permanent magnets (PMs) can more easily be demagnetized at high temperatures. When high speed machines are considered, heat extraction surfaces are small due to the higher energy density. This thesis focuses on the thermal modelling of a high speed slotless PMSM using analytical techniques. From literature it is clear that analytical distributed models have not reached its full potential in thermal modelling of electric machines. Thermal exper

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7

Oksar, Irfan. "Design And Realization Of Mixed Element Broadband Bandpass Filters." Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/4/1092964/index.pdf.

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In this thesis, a highly selective broadband hybrid bandpass filter operating between 0.4-2.0 GHz with a stopband up to 7 GHz is designed and analyzed. The realization is carried out by hybrid method, which combines both lumped and distributed element filters. In this approach, two separate filters, which are lumped highpass with 0.4 GHz corner frequency and distributed stripline lowpass with 2 GHz corner frequency, are combined to get the bandpass filter that has a passband in between 0.4 to 2.0 GHz. The usage of the lumped elements for the highpass filter resulted in a great size reduction c

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8

Alkaragoolee, Mohammed Y. A. "Hybrid Modelling and Optimisation of Oil Well Drillstrings." Thesis, University of Bradford, 2018. http://hdl.handle.net/10454/16859.

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The failure of oil well drillstrings due to torsional and longitudinal stresses caused by stick-slip phenomena during the drilling operation causes great expense to industry. Due to the complicated and harsh drilling environment, modelling of the drillstring becomes an essential requirement in studies. Currently, this is achieved by modelling the drillstring as a torsional lumped model (which ignores the length of the drillstring) for real-time measurement and control. In this thesis, a distributed-lumped model including the effects of drillstring length was developed to represent the d

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9

Filippou, Sotirios. "Virtual sensor for air mass flow measurement in an SI engine: Application of distributed lumped modelling in prediction of air mass flow into the cylinder of SI combustion engines." Thesis, University of Bradford, 2018. http://hdl.handle.net/10454/17450.

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After undergoing an extensive study about engine air mass flow measurement approaches as well as engine modelling for air mass flow prediction, a major problem found to exist is that engineers have still not found a suitable technique to accurately measure the air mass flow entering the cylinder of an internal combustion engine. The engine air mass flow is the most important parameter needed during engine development so the fuel control can be accurately calibrated and as a result increase performance and reduce emission output of an engine. The current methods used to determine the air mass f

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10

Yayla, Ihsan. "Filter Design Software By Synthesis Method." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/3/12610279/index.pdf.

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In this study, Window-based computer program, named Synthesis Software, is developed for designing filters with equal-ripple or maximally flat passbands and general stopbands by using cascade synthesis technique in transformed frequency domain. Synthesis technique is applicable to lumped element and commensurate line distributed element filters with Lowpass, Highpass or Bandpass characteristics. Singly or Doubly terminated filters can be synthesized. friendly environment for typing in the parameters of the filter to be designed. This part uses Synthesis and Plot parts as modules. This software

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11

Santos, Franciane Mendonça dos. "Modelagem concentrada e semi-distribuída para simulação de vazão, produção de sedimentos e de contaminantes em bacias hidrográficas do interior de São Paulo." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/18/18139/tde-26112018-145857/.

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A escassez de dados hidrológicos no Brasil é um problema recorrente em muitas regiões, principalmente em se tratando de dados hidrométricos, produção de sedimentos e qualidade da água. A pesquisa por modelos de bacias hidrográficas tem aumentado nas últimas décadas, porém, a estimativa de dados hidrossedimentológicos a partir de modelos mais sofisticados demanda de grande número de variáveis, que devem ser ajustadas para cada sistema natural, o que dificulta a sua aplicação. O objetivo principal desta tese foi avaliar diferentes ferramentas de modelagem utilizadas para a estimativa da vazão, p

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12

Goodpaster, Benjamin A. "Analytical Modeling and Impedance Characterization of Nonlinear, Steady-State Structural Dynamics in Thermomechanical Loading Environments." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1524063139635613.

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13

Karisan, Yasir. "Full-wave Electromagnetic Modeling of Electronic Device Parasitics for Terahertz Applications." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1419019102.

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14

Kuo, Tsung-Nan, and 郭宗男. "Compact Distributed-Lumped Microstrip Bandpass Filters." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/98711753512688733592.

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碩士<br>國立臺灣大學<br>電信工程學研究所<br>93<br>In this study, novel compact distributed-lumped microstrip bandpass filters, based on folded quarter-wavelength(λ/4) resonators, are proposed. Two transmission zeros at upper and lower stopbands are created by introducing a cross-coupling capacitance directly between the input and output ports of a 2nd-order filter. This pair of transmission zeros would not degrade the passband insertion loss and may improve the selectively. In order to achieve good spurious response and small circuit area, suitable open stubs and stepped impedance resonators are adopted in th

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15

chang, Jann-yuan, and 張振源. "Applications of lumped and distributed runoff models in Shihmen reservoir watershed." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/64652349314006819221.

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碩士<br>國立臺灣海洋大學<br>河海工程學系<br>95<br>Abstract Watershed rainfall-runoff simulation can be classified into lumped routing and distributed routing. The unit hydrograph, which is the hydrologic response function for a unit rainfall input at the watershed outlet, is the well-known lumped model. By using continuity equation and momentum equation, a distributed routing model associated with a conceptual model can simulate the propagation of flood wave in the watershed. The purpose of this study is to investigate the differences in rainfall-runoff simulating using the lumped model and the distributed mo

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16

Yang, Hsi-Ming, and 楊錫明. "Parallel-Coupled Bandpass Filters Based on Lumped-Distributed Coupled-Line Sections." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/47569831261817809514.

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碩士<br>國立臺灣大學<br>電信工程學研究所<br>93<br>In this study, parallel-coupled bandpass filters based on lumped-distributed coupled-line sections have been proposed to possess the merits of compact size, good selectivity, and good stopband rejection. Novel parallel-coupled bandpass filters are proposed, by using additional lumped capacitors or inductors to reduce the length of coupled-line sections. In addition, by introducing the capacitive or inductive cross-coupling effect, transmission zeros can be achieved to improve the filter selectivity. The locations of transmission zeros may be simply adjuste

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17

Kuan, Ming-Chih, and 官明志. "Analysis and synthesis of hybrid lumped-distributed circuits in z-domain." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/17865258213995766511.

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碩士<br>國立臺灣科技大學<br>電子工程系<br>88<br>The ABCD transmission matrices of z-transform representation are developed for transmission line, capacitor and inductor in recent researches. Such representations facilitate the investigation of circuit having cascade connection of two or more two-port networks in both frequency and time domains. In particular, the z-transform representations of circuit elements make it possible to utilize many application tools developed in digital signal processing (DSP) study. Three z-transform representations for inductor and capacitor, such as backward-difference, bilinea

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18

Whalley, R., Kambiz M. Ebrahimi, and A. A. Abdul-Ameer. "Hybrid modelling of machine tool axis drives." 2005. http://hdl.handle.net/10454/3951.

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No<br>The x-axis dynamics of a milling machine where the workpiece and saddle are mounted on supporting slides is considered. A permanent magnet motor, lead screw, ball nut and bearings are employed as the machine, traverse actuator mechanism. Hybrid, distributed¿lumped parameter methods are used to model the machine tool x-axis drive system. Inclusion of the spatial configuration of the drive generates the incident, travelling and reflected vibration signature of the system. Lead screw interactive torsion and tension loading, which is excited by cutting and input disturbance conditions, is in

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19

Lu, Zheng-Liang, and 盧政良. "Analysis and Design of Lumped- and Distributed- Element Branch-Line Coupler with Arbitrary Power Division." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/42054620414191206096.

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碩士<br>國立交通大學<br>電信工程系所<br>97<br>This thesis designs a 3-section wideband branch-line coupler with an arbitrary power division. Through the even/odd mode analysis, the arbitrary power division can be achieved by controlling the characteristic impedances of the branch lines. Meanwhile, for a specified power division, the fractional bandwidth can be predicted theoretically. The 3-section branch-line couplers are implemented by lumped elements and lumped distributed elements to reduce the circuit size. Theoretical analysis is validated by measurement results of experimental circuits.

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20

Shin, Sanghoon. "Theory and design of mixed lumped-distributed cross-coupled filters with applications to linear phase shifter and tunable filters." Thesis, 2002. http://library1.njit.edu/etd/fromwebvoyage.cfm?id=njit-etd2002-053.

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21

Goodrow, Sandra M. "Hydrological modeling for the regional stormwater management plan an application and intercomparison of event based runoff generation in an urban catchment using empirical, lumped vs. physical, distributed parameter modeling /." 2009. http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.000051353.

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