Now showing items 1-20 of 21

  • 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 ...
  • Development of an artificial neural network based relay to detect islanding condition of embedded generation 

    Salman, S. K.; King, David J. (Nanyang Technological University, Singapore, 2003)
    With the increase of number of embedded generators (EGs) in public utility networks the need for adequate protection schemes has become extremely important. In particular, safety problems that arise due to loss of ...
  • 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 ...
  • 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. ...
  • Egg hatching and survival time of soil-dwelling insect larvae: A partial differential equation model and experimental validation 

    Johnson, Scott N.; Zhang, Xiaoxian; Crawford, John W.; Gregory, Peter J.; Young, Iain M. (Elsevier Science B.V., 2007-04)
    Insect herbivores that have soil-dwelling larval stages usually lay eggs directly or indirectly into the soil. Following egg hatch, emergent larvae must locate host plant roots to avoid starvation and this represents the ...
  • 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, ...
  • A holistic approach to Concentration Assessment of hazards in the risk assessment of landfill leachate 

    Butt, T. E.; Oduyemi, Kehinde O. K. (Elsevier, 2003-01)
    Risk assessment is a new research area. The risk assessment research area deals with a wide range of issues other than landfills. Examples of these issues are Radiation, Food Industry, Ecology, Epidemiology, etc. The authors ...
  • Investigating factors affecting the anaerobic digestion of seaweed: modelling and experimental approaches 

    Hierholtzer, Anthony (Abertay UniversitySchool of Science, Engineering & Technology, 2013)
    The use of alternative feedstock sources to enhance the energy production of anaerobic systems, and thus their economic value, is one of the current research areas in the field of bioenergy production. Marine biomass ...
  • 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 ...
  • Modelling and visualizing sustainability assessment in urban environments 

    Isaacs, John P.; Falconer, Ruth E.; Gilmour, Daniel J.; Blackwood, David J. (Association of Researchers in Construction Management, 2010-09-06)
    Major urban development projects extend over prolonged timescales (up to 25 years in the case of major regeneration projects), involve a large number of stakeholders, and necessitate complex decision making. Comprehensive ...
  • 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. ...
  • Modelling the outflow from a porous pavement 

    Schlüter, Wolfram; Jefferies, Christopher (Taylor & Francis, 2002-09)
    The porous pavement of industrial and commercial areas is a form of sustainable urban drainage (SUD) system which has been developed to reduce runoff flow rates and volumes. This study reports on the modelling of the ...
  • Resilience of soil to biological invasion: analysis of spread on networks 

    Otten, Wilfred; Grinev, Dmitri V.; Perez-Reche, Francisco J.; Neri, Franco; da Costa, Luciano; Biana, Marcel; Gilligan, Chris; Taraskin, Sergei (International Union of Soil Sciences, 2010-08)
    A network model for soil pore volume is presented and applied to the analysis of biological invasion of microorganisms. The pore geometry of two soils with a relatively high or low bulk density were quantified with the ...
  • The role of visualisation in effective sustainability assessment 

    Isaacs, John P.; Blackwood, David J.; Falconer, Ruth E.; Gilmour, Daniel J. (SUE-MoT, 2007-06-27)
    Sustainable decision making in urban design is a complex and non-linear process that requires the interaction of a wide variety of stakeholders. A number of sustainable decision support tools have previously been developed ...
  • Stable reduced-order models for discrete-time systems 

    Lucas, T. Nigel (Institution of Engineering and Technology, 1987-01)
  • Sustainable urban developments: stakeholder engagement through 3D visualisation 

    Isaacs, John P.; Falconer, Ruth E.; Gilmour, Daniel J.; Blackwood, David J. (IASTED and ACTA Press, 2010-02-17)
    Rapidly increasing urban populations are placing increased pressure on social, economic and environmental resources. For our cities to cope with this demand we must ensure that any growth is sustainable. Tools already exist ...
  • 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 ...