Zobrazeno 1 - 10 of 22 pro vyhledávání: '"R S, Powell"'
1
Derivation of near-optimal pump schedules for water distribution by simulated annealing
Autor: R S Powell, G. McCormick
Publikováno v: Journal of the Operational Research Society. 55:728-736
The scheduling of pumps for clean water distribution is a partially discrete non-linear problem with many variables. The scheduling method described in this paper typically produces costs within 1% of a linear program-based solution, and can incorpor
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::625a1ad230812ac3891ba7b4a0a272d1
https://doi.org/10.1057/palgrave.jors.2601718
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3
Optimized pump scheduling in water distribution systems
Autor: M. J. H. Sterling, R. S. Powell, G. Yu
Publikováno v: Journal of Optimization Theory and Applications. 83:463-488
A method based on nonlinear programming for determining the optimal operation of general water distribution systems containing multiple sources and reservoirs is presented. The problem is formulated and solved so that, given the forecasted demands fo
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2ea51656a46d44b2b8956aa27244e968
https://doi.org/10.1007/bf02207638
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4
Applying methodologies for information systems development
Autor: R. S. Powell, David E. Avison, P. S. Uppal, Hanifa Unisa Shah
Publikováno v: Journal of Information Technology. 7:127-140
Many organizations develop their information systems without the use of any information systems development methodology. However, even when organizations identify the need for the use of such methodologies, it is not always obvious which to use, or w
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e914f7120384e54fa7efb7be25b59f00
https://doi.org/10.1057/jit.1992.19
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5
The development of a combined water demandprediction system
Autor: R. S. Powell, J. A. Hartley
Publikováno v: Civil Engineering Systems. 8:231-236
This paper introduces a system designed to improve the accuracy of short term water demand forecasts by combining a proven mathematical prediction model with a knowledge base of information relating to non-cyclic abnormal demand occurrences. In part
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::842467cdf12e94c1e478d9280b855cae
https://doi.org/10.1080/02630259108970631
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7
Antibodies to the N-terminal sequence of GVPa bind to the ends of gas vesicles
Autor: P. K. Hayes, R. Porter, R. S. Powell, Anthony E. Walsby
Publikováno v: Journal of General Microbiology. 137:2395-2400
Antibodies were raised against intact gas vesicles of Anabaena flos-aquae, and against a synthetic peptide (GVPaNT) whose sequence is identical to the N-terminal region of the main gas vesicle protein, GVPa. A two-stage centrifugation procedure is de
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::15c37ab85ec13961b9c03898746ac575
https://doi.org/10.1099/00221287-137-10-2395
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9
The gvpA/C cluster of Anabaena flos-aquae has multiple copies of a gene encoding GvpA
Autor: R. S. Powell, P. K. Hayes
Publikováno v: Archives of microbiology. 164(1)
Southern analysis of genomic DNA from Anabaena flos-aquae revealed that the genes encoding the two authenticated protein components of cyanobacterial gas vesicles, GvpA and GvpC, were carried on the same 4.9-kb HindIII restriction fragment. By compar
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d58827870ad97c7da19f846d3f759c9b
https://pubmed.ncbi.nlm.nih.gov/7544103
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