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Aineistot 21-40 / 1037

    • Acoustic Emission Testing of Multilayer Ceramic Capacitors 

      Levikari, Saku
      Acta Universitatis Lappeenrantaensis (Lappeenranta-Lahti University of Technology LUT, 25.03.2022)
      Capacitors are among the three fundamental passive electrical components alongside inductors and resistors. They are found in nearly every electronic circuit, with the function of storing electrical energy and filtering ...

    • Active du/dt Filtering for Variable-Speed AC Drives 

      Ström, Juha-Pekka
      Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 17.12.2009)
      An oscillating overvoltage has become a common phenomenon at the motor terminal in inverter-fed variable-speed drives. The problem has emerged since modern insulated gate bipolar transistors have become the standard choice ...

    • Active inverter output filtering methods 

      Korhonen, Juhamatti
      Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 12.10.2012)
      Frequency converters are widely used in the industry to enable better controllability and efficiency of variable speed AC motor drives. Despite these advantages, certain challenges concerning the inverter and motor ...

    • Active residential customer in a flexible energy system — a methodology to determine the customer behaviour in a multi-objective environment 

      Belonogova, Nadezda
      Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 05.12.2018)
      The transformation from passive into active end customers in modern energy systems has already started in many European countries, and it is a long process. The first step to engage residential customers to be active actors ...

    • Actors in Sustainability Transitions 

      Koistinen, Katariina
      Acta Universitatis Lappeenrantaensis (Lappeenranta-Lahti University of Technology LUT, 26.04.2019)
      The world is experiencing serious sustainability challenges, such as climate change and the loss of biodiversity. To respond to these sustainability challenges, there is a need for societies throughout the world to make ...

    • Adaptive binning and spatial profile partial least squares methods in scanning electron microscopy energy-dispersive X-ray spectroscopy and satellite hyperspectral pansharpening 

      Sihvonen, Tuomas
      Acta Universitatis Lappeenrantaensis (Lappeenranta-Lahti University of Technology LUT, 12.12.2023)
      Pansharpening is a data fusion method for image data. Traditionally, images from satellite remote sensing are fused, with one image having a high spatial resolution, but a low spectral one, and the other image vice versa. ...

    • Adaptive Markov chain Monte Carlo and Bayesian filtering for state space models 

      Mbalawata, Isambi Sailon
      Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 12.12.2014)
      This thesis is concerned with the state and parameter estimation in state space models. The estimation of states and parameters is an important task when mathematical modeling is applied to many different application areas ...

    • Adaptive MCMC methods with applications in environmental and geophysical models 

      Laine, Marko
      Finnish Meteorological Institute Contributions (Finnish Meteorological Institute, 14.03.2008)
      This work presents new, efficient Markov chain Monte Carlo (MCMC) simulation methods for statistical analysis in various modelling applications. When using MCMC methods, the model is simulated repeatedly to explore the ...

    • Adaptive User-Controlled Personalization for Virtual Journey Applications 

      Esanov, Bakhtiyor
      Acta Universitatis Lappeenrantaensis (Lappeenranta-Lahti University of Technology LUT, 24.05.2023)
      Recent developments in information systems, computer hardware, and software industries have made digital transformation more straightforward. Investments in digital transformation technologies and services worldwide are ...

    • Additional revenue opportunities in pulp mills and their impacts on the kraft process 

      Hamaguchi, Marcelo
      Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 18.12.2013)
      Although the concept of multi-products biorefinery provides an opportunity to meet the future demands for biofuels, biomaterials or chemicals, it is not assured that its implementation would improve the profitability of ...

    • Adsorptive removal of harmful organic compound from aqueous solutions 

      Turku, Irina
      Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 21.12.2010)
      Adsorption is one of the most commonly used methods in water treatment processes. It is attractive due to it easy operation and the availability of a wide variety of commercial adsorbents. This doctoral thesis focuses on ...

    • Advanced analysis and design methods for preparative chromatographic separation processes 

      Siitonen, Jani
      Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 12.12.2014)
      Preparative liquid chromatography is one of the most selective separation techniques in the fine chemical, pharmaceutical, and food industries. Several process concepts have been developed and applied for improving the ...

    • Advanced chemometric methods: Applicability on industrial data 

      Kohonen, Jarno
      Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 06.11.2009)
      Recent years have produced great advances in the instrumentation technology. The amount of available data has been increasing due to the simplicity, speed and accuracy of current spectroscopic instruments. Most of these ...

    • Advanced Techniques for Unsupervised Classification of Remote Sensing Hyperspectral Images 

      Hassanzadeh, Aidin
      Acta Universitatis Lappeenrantaensis (Lappeenranta-Lahti University of Technology LUT, 20.05.2019)
      Hyperspectral images consisting of a broad range of contiguous spectral bands ought to be a valuable tool for land cover type mapping. However, the coarse spatial resolutions of remote sensing Hyperspectral images makes a ...

    • Advances in Optimal Design of Shapes and Processes by Computational Fluid Dynamics 

      Immonen, Eero
      Acta Universitatis Lappeenrantaensis (Lappeenranta-Lahti University of Technology LUT, 09.10.2023)
      In many engineering applications, it is desirable to design objects which display good performance characteristics when interfacing with fluid flow, either internal or external to the objects. For example, an aircraft wing ...

    • Advancing sustainability-oriented innovations in industrial markets 

      Patala, Samuli
      Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 09.09.2016)
      Sustainability has become a new imperative for industrial firms as the global limits of environmental impacts are becoming more evident. Scarcity of natural resources, tightening environmental regulations and consumer ...

    • Agent-Based Modeling as Part of Biomass Supply System Research 

      Aalto, Mika
      Acta Universitatis Lappeenrantaensis (Lappeenranta-Lahti University of Technology LUT, 14.06.2019)
      Interest in the use of agent-based modeling (ABM) for studying biomass supply systems has increased because of its flexible and cost-efficient nature. While ABM has been around for a long time, recent developments in ...

    • Agent-based modelling for epidemiological applications 

      Shcherbacheva, Anna
      Acta Universitatis Lappeenrantaensis (Lappeenranta-Lahti University of Technology LUT, 29.03.2019)
      Malaria is an infectious disease induced by protozoan parasite called Plasmodium and transmitted by Anopheles mosquitoes which still imposes a health threat to virtually half of the human populace and causes severe mortality, ...

    • Aging based maintenance and reinvestment scheduling of electric distribution 

      Korpijärvi, Juha
      Acta Universitatis Lappeenrantaensis (23.11.2012)
      The maintenance of electric distribution network is a topical question for distribution system operators because of increasing significance of failure costs. In this dissertation the maintenance practices of the distribution ...

    • Aircraft tracking and classification with vhf passive bistatic radar 

      Ptak, Piotr
      Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 25.06.2015)
      Since the times preceding the Second World War the subject of aircraft tracking has been a core interest to both military and non-military aviation. During subsequent years both technology and configuration of the radars ...