Essays about: "stepwise algorithm"

Found 5 essays containing the words stepwise algorithm.

  1. 1. Evaluating a LSTM model for bankruptcy prediction with feature selection

    University essay from Luleå tekniska universitet/Institutionen för system- och rymdteknik

    Author : Emma Carlsson; [2023]
    Keywords : Feature selection; Bankruptcy prediction; Neural networks; LSTM; Chi-squared; t-test; Stepwise regression; Lasso regression; Random forest;

    Abstract : Bankruptcy prediction is an important research topic. The cost of incorrect decision making in companies and financial institutions can be great and could affect large parts of society. But while it is indeed a major research area, there are few studies which consider the effects of feature selection. READ MORE

  3. 2. Automatic Development of Pharmacokinetic Structural Models

    University essay from Uppsala universitet/Institutionen för farmaci

    Author : Alzahra Hamdan; [2022]
    Keywords : pharmacometrics; non-linear mixed effects; modelling; pharmacokinetics; NONMEM; automation; exhaustive algorithm; stepwise algorithm; structural models; inter-individual variability; residual error models; model selection;

    Abstract : Introduction: The current development strategy of population pharmacokinetic models is a complex and iterative process that is manually performed by modellers. Such a strategy is time-demanding, subjective, and dependent on the modellers’ experience. READ MORE

  4. 3. Improving the speed and quality of an Adverse Event cluster analysis with Stepwise Expectation Maximization and Community Detection

    University essay from Uppsala universitet/Institutionen för medicinska vetenskaper

    Author : Nils Erlanson; [2020]
    Keywords : Adverse Drug Reactions; Pharmacovigilance; Cluster Analysis; Stepwise Expectation Maximization; Community Detection; Topic Modelling;

    Abstract : Adverse drug reactions are unwanted effects alongside the intended benefit of a drug and might be responsible for 3-7\% of hospitalizations. Finding such reactions is partly done by analysing individual case safety reports (ICSR) of adverse events. The reports consist of categorical terms that describe the event. READ MORE

  5. 4. Individualization of fixed-dose combination regimens : Methodology and application to pediatric tuberculosis

    University essay from Uppsala universitet/Institutionen för farmaceutisk biovetenskap

    Author : Gunnar Yngman; [2015]
    Keywords : pharmacometrics; pharmacokinetics; PK; population pharmacokinetics; optimal design; FDC; fixed-dose combination; pediatrics; tuberculosis; rifampicin; pyrazinamide; isoniazid; ethambutol; modeling; simulation; estimation; allometric scaling; stochastical simulation and estimation; NONMEM; MATLAB; FO; FOCE; Expectation-Maximization algorithm; importance sampling; Nelder-Mead method; logistic function; discontinuity; euclidean distance; Sammon mapping; global minimum; local minima;

    Abstract : Introduction: No Fixed-Dose Combination (FDC) formulations currently exist for pediatric tuberculosis (TB) treatment. Earlier work implemented, in the software NONMEM, a rational method for optimizing design and individualization of pediatric anti-TB FDC formulations based on patient body weight, but issues with parameter estimation, dosage strata heterogeneity and representative pharmacokinetics remained. READ MORE

  6. 5. Antenna Optimization in Long-Term Evolution Networks

    University essay from KTH/Optimeringslära och systemteori

    Author : Qichen Deng; [2013]
    Keywords : Multi-Objective Optimization; Non Dominated Pareto Optimal Solutions; Pareto Front; Cost Function; Stepwise Minimization Algorithm; Random Search Algorithm; Modied Steepest Descent Algorithm; Multi-Objective Genetic Algorithm; Graphical User Interface GUI .;

    Abstract : The aim of this master thesis is to study algorithms for automatically tuning antenna parameters to improve the performance of the radio access part of a telecommunication network and user experience. There are four dierent optimization algorithms, Stepwise Minimization Algorithm, Random Search Algorithm, Modied Steepest Descent Algorithm and Multi-Objective Genetic Algorithm to be applied to a model of a radio access network. READ MORE