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This paper is concerned with the estimation of unknown drift functions of stochastic differential equations (SDEs) from observations of their sample paths. We propose to formulate this as a non-parametric Gaussian process regression problem and use an Ito-Taylor expansion for approximating the SDE. To address the computational complexity problem of Gaussian process regression, we cast the model in
The renovation of buildings involves multidisciplinary issues and multistakeholder involvement, which makes the process complex to manage. The purpose of this paper is to present a transparent, openly accessible, adaptable framework to ensure a sustainable renovation process, covering the technical, environmental, economic, social, and cultural historical aspects to be considered by the various ac
It is of interest to study not only the fundamental behavior of catalysts and reactors but also to ensure that they can be scaled up in size. This paper investigates the scale-up of a glycerol-to-propane process starting from fundamental laboratory data from micro-reactor testing to the kilogram scale. The process is described in detail and consist of the use of design documents and computer simul
The focus of this paper is on the design of pervaporation units for wastewater treatment taking into account technical, economic, and environmental aspects. Two different sized industrial wastewater streams of water-chloroform, and of water-methyl-isobutylketone (MIBK) are considered. Based on a wastewater stream of 1,500 kg/d, a semi-batch process combining pervaporation with a decanter recycle l
The simulation model for secondary settling tanks by Bürger et al. (2013) was introduced mainly to resolve spatial discretization problems when both hindered settling and the phenomena of compression and dispersion are included. Straightforward time integration unfortunately means long computationaltimes. The next step in the development is to introduce and investigate time-integration methods for
Excitation of a core electron and the subsequent emission of an Auger electron is described in a simplified model, where the core electrons couple only to the plasma oscillations of the conduction electrons and not to individual electron-hole excitations. Results are evaluated to lowest nontrivial order, namely when only terms linear in the interaction with the exciting probe and linear in the Aug
Our future built environment will not only consume energy, it will also produce (partly) its own energy need. Solar energy has been proven to be a valid strategy for producing on-site renewable energy. Planning for integrating solar energy in buildings involves many players and decision-making. In this article, a process map defining which decisions regarding solar energy needs to be discussed in
Metal halide perovskites (MHPs) have been studied intensely as the active material for optoelectronic devices. Lithography methods for perovskites remain limited because of the solubility of perovskites in polar solvents. Here, we demonstrate an electron-beam-lithography process with a poly(methyl methacrylate) resist based on the nonpolar solvents o-xylene, hexane, and toluene. Features down to 5
The possibility to print out metallic components with complex 3D-structures is could revolutionize the industry. In this master’s thesis the cause of process parameters have been investigated for three alloys; stainless steel, 316L, two nickel-based alloys, a derivative of Alloy 738 and 939. Microstructure, porosity, tensile testing, impact toughness, hardness and surface roughness was investigate
This master thesis is on Statistical Process Control (SPC). The objective is to evaluate if SPC can be used in a process that produces plates for heat exchanger, the process evaluated is located at Alfa Laval Lund AB. The products are produced in the process by punching and shearing metal coils. An ambition in the project is also to increase the knowledge about Statistical Process Control at Alfa
Research on monoclonal antibody (mAb) has considerably gained importance during the last decades, not only for cancer therapy but also for its importance in variety of fields. Unfortunately, the development phase can take several years before obtaining FDA approval, hence alternative approaches that could potentially shorten this timeline are critically needed. For instance, flow-injection analysi
The Hawkes process, also referred to as a self-exciting point process, is a class of point processes where the intensity is conditioned on previous events. More specifically, an event occurrence excites the process, temporarily increasing the probability of more events occurring. One application of Hawkes processes is to model occurrences of crimes, such as burglaries or shootings. The present the
Producing syngas with a low H2/CO ratio remains challenging in current industrial practice, primarily due to process limitations related to feedstock composition, reaction thermodynamics and restricted flexibility in conventional reforming technologies. This report investigates the potential of the Topsoe ReShiftTM technology as a revamp option for syngas production with a lower H2/CO ratio, lower
0731PDF_Computational modeling strategy of steel connections Master’s Dissertation Structural Mechanics Report TV SM -5235 C A RL-M IC H A EL BJÄ LKEN SÄTER and C A RL H O LM G REN C O M PU TA TIO N A L M O D ELIN G STR A TEG Y O F STEEL C O N N EC TIO N S CARL-MICHAEL BJÄLKENSÄTER and CARL HOLMGREN COMPUTATIONAL MODELING STRATEGY OF STEEL CONNECTIONS 5235HO.indd 15235HO.indd 1 2019-08-08 20:50:53
https://www.byggmek.lth.se/fileadmin/byggnadsmekanik/publications/tvsm5000/web5235.pdf - 2026-06-29
