Blar i USN Open Archive på forfatter "Sharma, Roshan"

Viser treff 21-36 av 36

    • Optimal Operation of the Peat Drying Process in Steam Tube Dryers 

      Kulakovsky, Leonid; Rosen, Victor; Sharma, Roshan; Pfeiffer, Carlos Fernando; Lie, Bernt (Journal article; Peer reviewed, 2015-11-25)
      Ukraine is an energy-dependent country and aims to reduce the import of natural gas, heat, and power in general. This implies extracting fuel from her own natural resources; one relevant and readily available energy carrier ...

    • Optimization of lift gas allocation in a gas lifted oil field as non-linear optimization problem. 

      Sharma, Roshan; Fjalestad, Kjetil; Glemmestad, Bjørn (Journal article; Peer reviewed, 2012)
      Proper allocation and distribution of lift gas is necessary for maximizing total oil production from a field with gas lifted oil wells. When the supply of the lift gas is limited, the total available gas should be optimally ...

    • Parameter estimation for externally simulated thermal network models 

      Brastein, Ole Magnus; Lie, Bernt; Sharma, Roshan; Skeie, Nils-Olav (Peer reviewed; Journal article, 2019)
      Obtaining accurate dynamic models of building thermal behaviour requires a statistically solid foundation for estimating unknown parameters. This is especially important for thermal network grey-box models, since all their ...

    • Real time control of robotic arm manipulators 

      Chowdhury, Mohammad Saifuddin (Master thesis, 2022)
      This thesis is based around creating an interface between a ROS-based robot arm and MATLAB, focusing mostly on robots in the industry. MATLAB will be used to implement a simulator of the robot and to create communication ...

    • Real-time Optimization and Control for Oil Production under Uncertainty 

      Janatian, Nima (Doctoral dissertations at the University of South-Eastern Norway;179, Doctoral thesis, 2024-02-02)
      The practical use of model-based optimization depends significantly on the accuracy of the model in use. This is because the presence of uncertainty can introduce a mismatch between the model and the real plant, which may ...

    • A robust model predictive control with constraint modification for gas lift allocation optimization 

      Janatianghadikolaei, Nima; Sharma, Roshan (Peer reviewed; Journal article, 2023)
      This paper presents a novel approach for implementing a robust real-time optimization framework under the presence of parametric uncertainty. Conservativeness is an inevitable drawback of a robust control approach. Therefore ...

    • Robust MPC for optimal oil production under the presence of uncertainties 

      Gulløy, Ragnvald Leyser (Master thesis, 2022)
      Industries, business and private people often want to maximize income. The petroleum industry is no exception. Higher production leads to higher income. Model predictive control can help maximizing the production at oil ...

    • Second Order KP Scheme for the Solution of flow in a Venturi Channel 

      Dissanayake, Susantha; Sharma, Roshan; Lie, Bernt (Journal article; Peer reviewed, 2018)
      In many different applications, a Venturi channel is used as a tool to compute fluid flow rates. The Saint-Venant equation is a hyperbolic type Partial Differential Equation (PDE) which can be used to model fluid flows ...

    • Second order scheme for open channel flow 

      Sharma, Roshan (Professional article, 2015-08-26)
      In the search for a numerical scheme which: (i) is semi-descrete in nature (only space discritization) so that built-in ODE solvers in MATLAB or Modelica can be used, (ii) can handle dry bed conditions (island or dry ...

    • Sensor placement and parameter identifiability in grey-box models of building thermal behaviour 

      Brastein, Ole Magnus; Sharma, Roshan; Skeie, Nils-Olav (Journal article; Peer reviewed, 2019)
      Building energy management systems can reduce energy consumption for space heating in existing buildings, by utilising Model Predictive Control. In such applications, good models of building thermal behaviour is important. ...

    • Short-Term Production Optimization for Electric Submersible Pump Lifted Oil Field With Parametric Uncertainty 

      Janatianghadikolaei, Nima; Sharma, Roshan (Peer reviewed; Journal article, 2023)
      This paper uses a scenario-based optimization method to address the Daily Production Optimization from an Electric Submersible Pump lifted oil field under the presence of uncertainty. The primary contribution of this work ...

    • Stochastic MPC for optimal operation of hydropower plant 

      Nabin, K. C. (Master thesis, 2022)
      Different categories of industries, such as manufacturing plants, power production plants etcetera, are equipped with a control mechanism to keep their process-variables of interest within the desired limit. Among different ...

    • Stochastic MPC For Optimal Operation of Hydropower Station Under Uncertainty 

      Jeong, Changhun; Sharma, Roshan (Peer reviewed; Journal article, 2022)
      The operational condition at the Dalsfoss power station is complicated due to many requirements related to environmental regulations and safety constraints such as the seasonally varying water level requirement at the ...

    • Third Order Reconstruction of the KP Scheme for Model of River Tinneselva 

      Dissanayake, Susantha; Sharma, Roshan; Lie, Bernt (Journal article; Peer reviewed, 2017)
      The Saint-Venant equation/Shallow Water Equation is used to simulate ow of river, ow of liquid in an open channel, tsunami etc. The Kurganov-Petrova (KP) scheme which was developed based on the local speed of discontinuity ...

    • Use of Orthogonal Collocation Method for a Dynamic Model of the Flow in a Prismatic Open Channel: For Estimation Purposes 

      Jinasena, Asanthi; Kaasa, Glenn-Ole; Sharma, Roshan (Journal article; Peer reviewed, 2017)
      The modeling and simulation of free surface flows are complex and challenging. Especially, the open channel hydraulics are often modeled by the well–known and efficient Saint–Venant equations. The possibility of efficiently ...

    • Using MPC to Balance Intermittent Wind and Solar Power with Hydro Power in Microgrids 

      Pandey, Madhusudhan; Winkler, Dietmar; Sharma, Roshan; Lie, Bernt (Peer reviewed; Journal article, 2021)
      In a microgrid connected with both intermittent and dispatchable sources, intermittency caused by sources such as solar and wind power plants can be balanced by dispatching hydro power into the grid. Both intermittent ...