Now showing items 1-16 of 16

  • Biased model reduction by factor division 

    Lucas, T. Nigel (Institution of Engineering and Technology, 1984-07)
    Model reduction by the factor division method is extended to produce biased models. A simple Routh-type algorithm avoids the necessity to calculate the retained system time moments and Markov parameters beforehand and ...
  • A conceptual model outline for integrated exposure assessment of waste disposal sites 

    Butt, T. E.; Ingles, A. J. D.; Baloch, M. I. (Wiley-Blackwell, 2011-12)
    There are generic elements in environmental risk assessments, which are independent of the subject to which risk analysis is applied. Examples of these elements are as follows: baseline study, hazard identification, hazards' ...
  • Dynamic visualisation and modelling to support sustainable phosphate management 

    Isaacs, John P.; Falconer, Ruth E.; Gilmour, Daniel J.; Blackwood, David J. (British Hydrological Society, 2012-09-14)
    Under the WFD the UK water companies are responsible for providing effective treatment methods which will reduce the level of phosphate, a key nutrient in river eutrophication, in their respective waterways. The selection ...
  • Effect of water content on the thermal inactivation kinetics of horseradish peroxidase freeze-dried from alkaline pH 

    Lemos, Adília; Oliveira, J. C.; Saraiva, J. A. (SAGE, 2001)
    The thermal inactivation of horseradish peroxidase freeze-dried from solutions of different pH (8, 10 and 11.5, measured at 25 C) and equilibrated to different water contents was studied in the temperature range from 110 ...
  • Efficient algorithm for reduction by continued-fraction expansion about s = 0 and s = a 

    Lucas, T. Nigel (Institution of Engineering and Technology, 1983-11)
    An algorithm is given for model reduction by continued-fraction expansion about the origin and a general point. It is seen to be more efficient than the existing method and has the advantage of also generating biased models. ...
  • Enhancement of water treatment sustainability through dynamic visualisation & modelling 

    Isaacs, John P.; Falconer, Ruth E.; Gilmour, Daniel J.; Blackwood, David J.; Comber, Sean; Whitehead, Paul (Acqua Consultoria, 2011-09)
    The Water Framework Directive (WFD) proscribes specific levels of contaminates present in rivers and lakes in the UK, these contaminants come from a wide range of sources such as food additives present in faeces, agricultural ...
  • Extension of matrix method for complete multipoint Pade approximation 

    Lucas, T. Nigel (Institution of Engineering and Technology, 1993-09)
    A recent multipoint Pade approximation technique for linear system reduction is extended to include expansion points at infinity. The method is then seen to be completely general, covering the cases of real, complex, ...
  • Linear system reduction by continued-fraction expansion about three points 

    Lucas, T. Nigel (Institution of Engineering and Technology, 1984-01)
    The method of model reduction by continued-fraction expansion about s = 0 and s = a is extended to include the point s = à ¿ also. This achieves more accurate transient approximations and thus highlights further the ...
  • Linear system reduction using Schwarz canonical form 

    Davidson, A. M.; Lucas, T. Nigel (Institution of Engineering and Technology, 1976-06)
    A system reduction method based on Schwarz canonical form has recently been observed to have certain moment-matching properties. By reformulating the method, these properties are proved and extended and the stability of ...
  • Linear-system reduction by continued-fraction expansion about a general point 

    Davidson, A. M.; Lucas, T. Nigel (Institution of Engineering and Technology, 1974-07)
    Capacity requirements for multiple-access demand-assigned communication systems are broken down into information, demand and assignment signalling. A simultaneous-transmission scheme for demand signalling greatly reduces ...
  • Model reduction by condensed continued-fraction method 

    Lucas, T. Nigel (Institution of Engineering and Technology, 1985-08)
    It is shown how the continued-fraction method of Chen and Shieh may be used on part of the transfer function to produce reduced-order models when its normal application is unsatisfactory. In addition, the truncation method ...
  • Modeling raindrop strike performance on copper wash-off from vine leaves 

    Pérez-Rodríguez, P.; Soto-Gómez, D.; López-Periago, J. E.; Paradelo, M. (Elsevier, 2015-03-01)
    Copper lost in foliar wash-off from vine leaves treated with Cu-based fungicides was analyzed with a single-drop rainfall simulator. The temporal losses of the particulate Cu (CuP) and the solution Cu (CuS) from raindrop ...
  • Modelling the movement and survival of the root-feeding clover weevil, Sitona lepidus, in the root-zone of white clover 

    Zhang, Xiaoxian; Johnson, Scott N.; Gregory, Peter J.; Crawford, John W.; Young, Iain M.; Murray, Philip J.; Jarvis, Steve C. (Elsevier Science B.V., Amsterdam, 2006-01)
    White clover (Trifolium repens) is an important pasture legume but is often difficult to sustain in a mixed sward because, among other things, of the damage to roots caused by the soil-dwelling larval stages of S. lepidus. ...
  • Regression models of sprint, vertical jump, and change of direction performance 

    Swinton, Paul A.; Lloyd, Ray; Keogh, Justin W.L.; Agouris, Ioannis; Stewart, Arthur D. (Lippincott, Williams & Wilkins, 2014-07)
    It was the aim of the present study to expand on previous correlation analyses that have attempted to identify factors that influence performance of jumping, sprinting, and changing direction. This was achieved by using a ...
  • Stable reduced-order models for discrete-time systems 

    Lucas, T. Nigel (Institution of Engineering and Technology, 1987-01)
  • Sustainable wastewater treatment: how might microbial fuel cell contribute 

    Oh, Sungtaek; Kim, Jung Rae; Premier, Giuliano C.; Lee, Tae Ho; Kim, Changwon; Sloan, William T. (Elsevier, 2010)
    The need for cost-effective low-energy wastewater treatment has never been greater. Clean water for our expanding and predominantly urban global population will be expensive to deliver, eats into our diminishing carbon-based ...