Zobrazeno 1 - 10
of 37
pro vyhledávání: '"P.L. de Vaal"'
Autor:
P.L. de Vaal, G.Z. Gous
Publikováno v:
ISA Transactions. 51:657-664
Traditionally the tuning of dynamic matrix control (DMC) type multivariable controllers is done by trial and error. The APC engineer chooses arbitrary starting values and tests the performance on a simulated controller. The engineer then either incre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2482e21eabf7695f6279dae5a636e389
https://doi.org/10.1016/j.isatra.2012.05.006
https://doi.org/10.1016/j.isatra.2012.05.006
Akademický článek
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Publikováno v:
Engineering Failure Analysis. 14:1329-1345
Retrievals obtained after revision surgery, provide valuable information on the rate of wear and the causes of wear that take place in vivo. The aim of this study was to perform a root cause failure analysis to determine the principle reason for mech
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9084defb837e8ab32b1fe90663470a2c
https://doi.org/10.1016/j.engfailanal.2006.11.005
https://doi.org/10.1016/j.engfailanal.2006.11.005
Autor:
S.H. Fourie, P.L. de Vaal
Publikováno v:
Computers & Chemical Engineering. 24:755-760
A nonlinear multiscale principal component analysis (NLMSPCA) methodology is proposed for process monitoring and fault detection based on multilevel wavelet decomposition and nonlinear principal component analysis via an input-training neural network
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ee2223ff202f9dd10eab5579184d435e
https://doi.org/10.1016/s0098-1354(00)00417-8
https://doi.org/10.1016/s0098-1354(00)00417-8
Autor:
C.P. Ungerer, E. Boje, J. Gouws, P.L. De Vaal, I.K. Craig, S.G. McLaren, J.L. van Niekerk, B. Wigdorowitz, Christopher L.E. Swartz, M. Braae
Publikováno v:
IEEE Control Systems. 16:41-47
Control engineering education is provided to students in South Africa at both the undergraduate and postgraduate levels, starting with elementary courses at the third or fourth year of bachelor's degree programs. Master's degree courses are given on
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c97ce621cc3760e8e7c64eb0ce167def
https://doi.org/10.1109/37.487409
https://doi.org/10.1109/37.487409
Autor:
P.L. de Vaal
Publikováno v:
Computers & Chemical Engineering. 20:S1359-S1364
In process control, nonlinearities and dead-time often play a significant role in the unsuccessful implementation of control systems. This is due to variations in operating conditions and process behaviour affecting controller performance within the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e9937f42f22c0e405de9143f174b92c8
https://doi.org/10.1016/0098-1354(96)00233-5
https://doi.org/10.1016/0098-1354(96)00233-5
Publikováno v:
Green Tribology ISBN: 9783642236808
As a developing country, South Africa is in a unique position with regard to establishing, maintaining and expanding infrastructure to ensure compliance with international trends with respect to environmental regulations, while at the same time estab
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::96ea4ce8e8a1458183fe20abfff0f034
https://doi.org/10.1007/978-3-642-23681-5_20
https://doi.org/10.1007/978-3-642-23681-5_20
Autor:
P.L. de Vaal, G. Marais
Publikováno v:
ASME/STLE 2011 Joint Tribology Conference.
A study was undertaken to analyse results obtained with the HFRR instrument by identifying crucial factors contributing to friction and wear mechanisms. For lubricated tests a mixture of n-hexadecane (cetane) as base fluid and palmitic acid as lubric
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::11de23327eee8dbe3db2536da205ff8d
https://doi.org/10.1115/ijtc2011-61188
https://doi.org/10.1115/ijtc2011-61188
Autor:
B. Meister, P.L. de Vaal
Publikováno v:
World Tribology Congress III, Volume 1.
The 12-stage FZG test (A/8,33/90) was originally developed to determine scuffing load capacity of engine oils [1]. During each load stage, the test is started at the same initial sump temperature. Heat of friction generated during a load stage result
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::251f40a3ebf745df20247777cf9129ce
https://doi.org/10.1115/wtc2005-63333
https://doi.org/10.1115/wtc2005-63333
Autor:
Carl Sandrock, P.L. de Vaal
Effective control of the sulphite pulp digestion process in the production of dissolved pulp in a batch digester is limited by three important restrictions namely, the inability to measure the degree of polymerisation (DP) of the cellulose in the woo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f7202d8fa31a599c173737b84db66bfd
https://doi.org/10.1016/s1570-7946(03)80250-x
https://doi.org/10.1016/s1570-7946(03)80250-x