Advanced Computing in Industrial Mathematics
14th Annual Meeting of the Bulgarian Section of SIAM, December 17-19, 2019, Sofia, Bulgaria, Revised Selected Papers
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Chapter and Conference Paper
Comparative Analysis on Neural Networks and ARIMA for Forecasting Heterogeneous Portfolio Returns
In the domain of portfolio management theory, the principle of separation postulates that all investors will achieve an identical optimal risk portfolio given the same inputs. However, the realization of true ...
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Chapter and Conference Paper
Portfolio Construction Using Neural Networks and Multiobjective Optimization
In recent times, financial markets have been increasingly affected by significant volatility and uncertainty. Given this backdrop, it is beneficial for investors to explore a broader range of asset classes whe...
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Chapter and Conference Paper
Correction to: Numerical Methods and Applications
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Chapter and Conference Paper
Comparative Analysis of ARIMA and Modified Differential Equation Approaches in Stock Price Prediction and Portfolio Formation
In portfolio management theory, the principle of separation states that with the same input, all investors will have the same optimal risk portfolio. Whether the portfolio will actually be optimal depends on h...
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Chapter and Conference Paper
Evaluation of the Effective Material Properties of Media with Voids Based on Numerical Homogenization and Microstructure Data
This work is devoted to a 3D hybrid numerical-experimental homogenization strategy for determination of elastic characteristics of materials with closed voids. The performed homogenization procedure employs mi...
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Chapter and Conference Paper
Diversification and Optimization of the Financial Portfolio in Times of Uncertainty
In conditions of pandemic, economic crisis, or other force majeure circumstances that can lead to dynamics: increase or decrease in the prices of certain financial instruments, it is good to organize the inves...
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Book and Conference Proceedings
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Book and Conference Proceedings
Numerical Methods and Applications
10th International Conference, NMA 2022, Borovets, Bulgaria, August 22–26, 2022, Proceedings
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Book and Conference Proceedings
Advanced Computing in Industrial Mathematics
15th Annual Meeting of the Bulgarian Section of SIAM, December 15-17, 2020, Sofia, Bulgaria, Revised Selected Papers
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Chapter and Conference Paper
Subrecursive Graphs of Representations of Irrational Numbers
Our goal is to compare the complexity of different representations of irrational numbers. We use the following complexity framework: one representation is subrecursive in another representation if it is possib...
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Chapter and Conference Paper
Effluent Recirculation for Contaminant Removal in Constructed Wetlands Under Uncertainty: A Stochastic Numerical Approach Based on Monte Carlo Methodology
The problem of the alternative operational technique concerning effluent re-circulation in Horizontal Subsurface Flow Constructed Wetlands (HSF CW), and the possibility of this technique to remove efficiently ...
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Chapter
Current Issues of Multimodal and Intermodal Cargo Transportation
Freight transport is constantly growing and the forecast is that this trend will continue in the future. The sustainable development of transport requires the development of activities, which yield higher econ...
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Chapter and Conference Paper
Dedekind Cuts and Long Strings of Zeros in Base Expansions
In this paper, we study the complexity of irrational numbers under different representations. It is well-known that they can be computably transformed from one into another, but in general not subrecursively (...
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Chapter
Research on the State of Urban Passenger Mobility in Bulgaria and Prospects for Using Low Carbon Energy for Transport
The work investigates the state of and the challenges facing the urban mobility in Bulgaria, related to demographic problems, the operation of urban public transport, the environment and traffic safety. Four s...
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Chapter
The Danube River, Multimodality and Intermodality
The work deals with the issues related to multimodal and intermodal transport on the Danube River. An analysis of the state of transport has been made, taking into account the European and national transport d...
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Book
Advanced Computing in Industrial Mathematics
11th Annual Meeting of the Bulgarian Section of SIAM December 20-22, 2016, Sofia, Bulgaria. Revised Selected Papers
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Chapter
Total Phosphorus Removal in Horizontal Subsurface Flow Constructed Wetlands: A Computational Investigation for the Optimal Adsorption Model
A numerical simulation concerning Total Phosphorus (TP) removal in Horizontal Subsurface Flow Constructed Wetlands (HSF CWs) is presented. For the phenomenon of absorption, a comparison between the results of ...
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Chapter and Conference Paper
On General Sum Approximations of Irrational Numbers
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Chapter
Comparison of NDT Techniques for Elastic Modulus Determination of Laminated Composites
The study of dependence of elasticity modulus on the type, shape and structure of the fillers in the composites is an important task. By theoretical point of view, different models are developed to describe th...
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Chapter
Multidimensional Intuitionistic Fuzzy Quantifiers and Level Operators
In a series of papers, the authors introduced the concepts of multidimensional intuitionistic fuzzy sets and logic. Here, the concepts of a multidimensional intuitionistic fuzzy quantifier and an intuitionisti...
