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Relevant bibliographies by topics / Demand-driven-Analysis – (PDA)

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Academic literature on the topic 'Demand-driven-Analysis – (PDA)'

Author: Grafiati

Published: 5 September 2021

Last updated: 7 February 2022

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Journal articles on the topic "Demand-driven-Analysis – (PDA)"

1

Lee, Ho Min, Do Guen Yoo, Doosun Kang, Hwandon Jun, and Joong Hoon Kim. "Uncertainty quantification of pressure-driven analysis for water distribution network modeling." Water Supply 16, no. 3 (2015): 599–610. http://dx.doi.org/10.2166/ws.2015.168.

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The hydraulic analysis of water distribution networks (WDNs) is divided into two approaches: namely, a demand-driven analysis (DDA) and a pressure-driven analysis (PDA). In the DDA, the basic assumption is that the nodal demand is fully supplied irrespective of the nodal pressure, which is mainly suitable for normal operating conditions. However, in abnormal conditions, such as pipe failures or unexpected increase in demand, the DDA approach may cause unrealistic results, such as negative pressure. To address the shortcomings of DDA, PDA has been considered in a number of studies. For PDA, how

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Choi, Young Hwan. "Qualification of Hydraulic Analysis Models for Optimal Design of Water Distribution Systems." Applied Sciences 11, no. 17 (2021): 8152. http://dx.doi.org/10.3390/app11178152.

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The hydraulic analysis of water distribution systems (WDSs) is divided into two approaches, namely, a demand-driven analysis (DDA) and a pressure-driven analysis (PDA). In DDA, the basic assumption is that the nodal demand is fully supplied irrespective of the nodal pressure, which is mainly suitable for normal operating conditions. However, in abnormal conditions, such as pipe failures or unexpected increases in demand, the DDA approach may cause unrealistic results, such as negative pressure. However, despite these realistic hydraulic analysis approaches for WDSs being emphasized in the desi

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3

Mădulărea, Remus Alexandru, Petre-Ovidiu Ciuc, Andrei-Mugur Georgescu, and Sanda-Carmen Georgescu. "Speed factors computed for pumping schedules in Water Distribution Networks: DDA versus PDA formulations." E3S Web of Conferences 85 (2019): 06002. http://dx.doi.org/10.1051/e3sconf/20198506002.

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This paper focuses on a methodology allowing to derive the pumping schedule in Water Distribution Networks (WDN), upon a time dependent water demand. The selected test case is a previously studied WDN. Two pumping algorithms give different pumping rules. By solving the nonlinear system of equations, consisting of energy balance equations, mass balance equations and pumping rules, one gets the pumps speed factors. Solutions attached to the Pressure Driven Analysis (PDA) correspond to energy and cost savings, with respect to the solutions given by the Demand Driven Analysis (DDA). The methodolog

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4

Dewland, Jason C., and Andrew See. "Notes on Operations: Patron Driven Acquisitions: Determining the Metrics for Success." Library Resources & Technical Services 59, no. 1 (2015): 13. http://dx.doi.org/10.5860/lrts.59n1.13.

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Patron Driven Acquisition (PDA) programs have been established in many libraries, but there is no agreed upon set of metrics to evaluate the programs’ performance. With that in mind, the University of Arizona (UA) formed the On-Demand Information Delivery (ODID) Metrics Team in January 2012 to establish metrics to evaluate their PDA program. This paper examines the results of the team’s findings and provides an extensive analysis of the purchases by Library of Congress (LC) classification, publisher, format, etc. The discussion includes an analysis of the process and challenges of measuring a

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5

Morosini, Attilio Fiorini, Olga Caruso, and Paolo Veltri. "Management of Water Distribution Systems in PDA Condition with Isolation Valves." Proceedings 2, no. 11 (2018): 672. http://dx.doi.org/10.3390/proceedings2110672.

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The correct management of Water Distribution Networks (WDNs) allows to obtain a reliable system. When a pipe failure occurs in a network and it is necessary to isolate a zone, it is possible that some nodes do not guarantee service for the users due to inadequate heads. In these conditions a Pressure Driven Analysis (PDA) is the correct approach to evaluate network behavior. This analysis is more appropriate than the Demand Driven Analysis (DDA) because it is known that the effective delivered flow at each node is influenced by the pressure value. In this case, it is important to identify a su

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6

Fiorini Morosini, Attilio, Sina Shaffiee Haghshenas, Sami Shaffiee Haghshenas, Doo Yong Choi, and Zong Woo Geem. "Sensitivity Analysis for Performance Evaluation of a Real Water Distribution System by a Pressure Driven Analysis Approach and Artificial Intelligence Method." Water 13, no. 8 (2021): 1116. http://dx.doi.org/10.3390/w13081116.

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Proper performance of water distribution networks (WDNs) plays a vital role in customer satisfaction. The aim of this study is to conduct a sensitivity analysis to evaluate the behavior of WDNs analyzed by a pressure-driven analysis (PDA) approach and the classification technique by using an appropriate artificial neural network, namely the Group Method of Data Handling (GMDH). For this purpose, this study is divided into four distinct steps. In the first and second steps, a real network has been analyzed by using a Pressure-Driven Analysis approach (PDA) to obtain the pressure, and α coeffici

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7

Conety Ravi, Suribabu, Neelakantan Thurvas Renganathan, Sivakumar Perumal, and Diego Paez. "Analysis of water distribution network under pressure-deficient conditions through emitter setting." Drinking Water Engineering and Science 12, no. 1 (2019): 1–13. http://dx.doi.org/10.5194/dwes-12-1-2019.

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Abstract. Pressure-driven analysis (PDA) of water distribution networks necessitates an assessment of the supplying capacity of a network within the minimum and required pressure ranges. Pressure-deficient conditions happen due to the uncertainty of nodal demands, failure of electromechanical components, diversion of water, aging of pipes, permanent increase in the demand at certain supply nodes, fire demand, etc. As the demand-driven analysis (DDA) solves the governing equations without any bound on pressure head, it fails to replicate the real scenario, particularly when the network experien

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8

Bonora, Marco Amos, Fabio Caldarola, and Mario Maiolo. "A New Set of Local Indices Applied to a Water Network through Demand and Pressure Driven Analysis (DDA and PDA)." Water 12, no. 8 (2020): 2210. http://dx.doi.org/10.3390/w12082210.

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In the analysis of drinking Water Distribution Networks (WDNs), performance indices are widely used tools for obtaining synthetic information about the WDN operating regime (pressures and flows). This paper presents applications of a series of local surplus indices that act in a new mathematical framework. This framework allows reworking many well-known performance and energetic indices and simultaneously allowing analysis of specific aspects of the WDN. The analyses are carried out using different resolutive hydraulic approaches: the Demand-Driven Analysis (DDA) and the Pressure-Driven Analys

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9

Goedeken, Edward A., and Karen Lawson. "The Past, Present, and Future of Demand-Driven Acquisitions in Academic Libraries." College & Research Libraries 76, no. 2 (2015): 205–21. http://dx.doi.org/10.5860/crl.76.2.205.

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Demand-driven acquisitions (DDA) programs have become a well-established approach toward integrating user involvement in the process of building academic library collections. However, these programs are in a constant state of evolution. A recent iteration in this evolution of ebook availability is the advent of large ebook collections whose contents libraries can lease, but not own only if they choose to do so. This study includes an investigation of patron usage and librarian ebook selection by comparing call number data generated by usage of three entities: (1) an ebrary PDA; (2) Academic Co

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10

Fiorini Morosini, Attilio, Sina Shaffiee Haghshenas, Sami Shaffiee Haghshenas, and Zong Woo Geem. "Development of a Binary Model for Evaluating Water Distribution Systems by a Pressure Driven Analysis (PDA) Approach." Applied Sciences 10, no. 9 (2020): 3029. http://dx.doi.org/10.3390/app10093029.

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Investigation of Water Distribution Networks (WDNs) is considered a challenging task due to the unpredicted and uncertain conditions in water engineering. When in a WDN, a pipe failure occurs, and shut-off valves to isolate the broken pipe to allow repairing works are activated. In these new conditions, the hydraulic parameters in the network are modified because the topology of the entire system changes. If the head becomes inadequate, the Pressure Driven Analysis (PDA) is the correct approach to evaluate the performance of water networks. Hence, in the present study, the water distribution s

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