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S. Sotirov · SciRah

Researcher profile · Semantic Scholar

S. Sotirov

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S. Sotirov — researcher profile on SciRah

h-index: 14
Works: 138
Citations: 784

Most-cited papers

A Hybrid Approach for Modular Neural Network Design Using Intercriteria Analysis and Intuitionistic Fuzzy Logic
S. Sotirov, E. Sotirova, Vassia Atanassova, K. Atanassov +4 more
2018Complex41 citations Open access
Semantic Scholar
Investigation of relationships between bulk properties and fraction properties of crude oils by application of the intercriteria analysis
D. Stratiev, S. Sotirov, I. Shishkova, Angel Nedelchev +10 more
201633 citations
Semantic Scholar
Role of Catalyst in Optimizing Fluid Catalytic Cracking Performance During Cracking of H-Oil-Derived Gas Oils
D. Stratiev, I. Shishkova, Mihail Ivanov, R. Dinkov +13 more
2021ACS Omega27 citations Open access
Semantic Scholar
Application of the Intuitionistic Fuzzy InterCriteria Analysis Method with Triples to a Neural Network Preprocessing Procedure
S. Sotirov, Vassia Atanassova, E. Sotirova, L. Doukovska +3 more
2017Computational Intelligence and Neuroscience25 citations Open access
Semantic Scholar
Roles of Catalysts and Feedstock in Optimizing the Performance of Heavy Fraction Conversion Processes: Fluid Catalytic Cracking and Ebullated Bed Vacuum Residue Hydrocracking
D. Stratiev, I. Shishkova, G. Argirov, R. Dinkov +8 more
2024Catalysts16 citations Open access
Semantic Scholar
Intuitionistic Fuzzy Deep Neural Network
K. Atanassov, S. Sotirov, T. Pencheva
2023Mathematics14 citations Open access
Semantic Scholar
Petroleum viscosity modeling using least squares and ANN methods
D. Stratiev, S. Nenov, S. Sotirov, I. Shishkova +6 more
2022Journal of Petroleum Science and Engineering14 citations
Semantic Scholar
Prediction of Viscosity of Blends of Heavy Oils with Diluents by Empirical Correlations and Artificial Neural Network
D. Stratiev, S. Nenov, I. Shishkova, S. Sotirov +7 more
2023Industrial & Engineering Chemistry Research13 citations
Semantic Scholar
Prediction of Molecular Weight of Petroleum Fluids by Empirical Correlations and Artificial Neuron Networks
D. Stratiev, S. Sotirov, E. Sotirova, S. Nenov +8 more
2023Processes13 citations Open access
Semantic Scholar
Intercriteria analysis over normalized data
K. Atanassov, Vassia Atanassova, P. Chountas, M. Mitkova +3 more
2016IEEE International Conference on Intelligent Systems12 citations
Semantic Scholar
Impulsive Control Via Variable Impulsive Perturbations on a Generalized Robust Stability for Cohen–Grossberg Neural Networks With Mixed Delays
Jin-De Cao, T. Stamov, S. Sotirov, E. Sotirova +1 more
2020IEEE Access11 citations Open access
Semantic Scholar
Evaluation of the Different Compatibility Indices to Model and Predict Oil Colloidal Stability and Its Relation to Crude Oil Desalting
I. Shishkova, D. Stratiev, M. Tavlieva, R. Dinkov +9 more
2021Resources10 citations Open access
Semantic Scholar
Impulsive Fractional Cohen-Grossberg Neural Networks: Almost Periodicity Analysis
I. Stamova, S. Sotirov, E. Sotirova, G. Stamov
2021Fractal and Fractional10 citations Open access
Semantic Scholar
Heavy Fuel Oil Quality Dependence on Blend Composition, Hydrocracker Conversion, and Petroleum Basket
S. Sotirov, E. Sotirova, R. Dinkov, D. Stratiev +11 more
2025Fuels9 citations Open access
Semantic Scholar
Experience in Processing Alternative Crude Oils to Replace Design Oil in the Refinery
D. Stratiev, I. Shiskova, V. Toteva, Georgi Georgiev +11 more
2024Resources9 citations Open access
Semantic Scholar
Crude Slate, FCC Slurry Oil, Recycle, and Operating Conditions Effects on H-Oil® Product Quality
D. Stratiev, I. Shishkova, R. Dinkov, I. Petrov +9 more
2021Processes9 citations Open access
Semantic Scholar
Transforming Pediatric Healthcare with Generative AI: A Hybrid CNN Approach for Pneumonia Detection
S. Sotirov, D. Orozova, B. Angelov, E. Sotirova +1 more
2025Electronics8 citations Open access
Semantic Scholar
Predicting Petroleum SARA Composition from Density, Sulfur Content, Flash Point, and Simulated Distillation Data Using Regression and Artificial Neural Network Techniques
I. Shiskova, D. Stratiev, S. Sotirov, E. Sotirova +8 more
2024Processes8 citations Open access
Semantic Scholar
Prediction of Refractive Index of Petroleum Fluids by Empirical Correlations and ANN
Georgi Palichev, D. Stratiev, S. Sotirov, E. Sotirova +8 more
2023Processes8 citations Open access
Semantic Scholar
Uncertainty and Imprecision in Decision Making and Decision Support: Cross-Fertilization, New Models and Applications
K. Atanassov, J. Kacprzyk, Andrzej Kałuszko, M. Krawczak +5 more
20188 citations
Semantic Scholar
Application of Intercriteria and Regression Analyses and Artificial Neural Network to Investigate the Relation of Crude Oil Assay Data to Oil Compatibility
I. Shiskova, D. Stratiev, Mariana Tavlieva, Angel Nedelchev +9 more
2024Processes7 citations Open access
Semantic Scholar
Empirical Models to Characterize the Structural and Physiochemical Properties of Vacuum Gas Oils with Different Saturate Contents
D. Stratiev, I. Shishkova, R. Dinkov, I. Petrov +11 more
2021Resources7 citations Open access
Semantic Scholar
Comparison of Empirical Models to Predict Viscosity of Secondary Vacuum Gas Oils
D. Stratiev, S. Nenov, I. Shishkova, R. Dinkov +8 more
2021Resources7 citations Open access
Semantic Scholar
Different Nonlinear Regression Techniques and Sensitivity Analysis as Tools to Optimize Oil Viscosity Modeling
D. Stratiev, S. Nenov, D. Nedanovski, I. Shishkova +11 more
2021Resources7 citations Open access
Semantic Scholar
Generalized Net Model of Fingerprint Recognition with Intuitionistic Fuzzy Evaluations
Veselina Bureva, Plamena Yovcheva, S. Sotirov
2017EUSFLAT/IWIFSGN7 citations
Semantic Scholar
A Generalized Net Model for Evaluation Process Using InterCriteria Analysis Method in the University
E. Sotirova, Veselina Bureva, S. Sotirov
2016Imprecision and Uncertainty in Information Representation and Processing7 citations
Semantic Scholar
Root Cause Analysis for Observed Increased Sedimentation in a Commercial Residue Hydrocracker
I. Shishkova, D. Stratiev, Petko Kirov, R. Dinkov +9 more
2025Processes6 citations Open access
Semantic Scholar
Commercial Ebullated Bed Vacuum Residue Hydrocracking Performance Improvement during Processing Difficult Feeds
B. Georgiev, D. Stratiev, G. Argirov, Angel Nedelchev +11 more
2023Applied Sciences6 citations Open access
Semantic Scholar
An application of Virtual Reality technology in Education
T. Petkov, M. Mitkova, Stanimir Surchev, Stanislav Popov +6 more
20192019 29th Annual Conference of the European Association for Education in Electrical and Information Engineering (EAEEIE)6 citations
Semantic Scholar
Clustering of Intercriteria Analysis Data Using a Health-Related Quality of Life Data
S. Sotirov, D. Vankova, V. Vasilev, E. Sotirova
2019International Conference on Flexible Query Answering Systems6 citations
Semantic Scholar
Imprecision and Uncertainty in Information Representation and Processing - New Tools Based on Intuitionistic Fuzzy Sets and Generalized Nets
Plamen P. Angelov, S. Sotirov
2016Imprecision and Uncertainty in Information Representation and Processing6 citations
Semantic Scholar
Metacities Excellence Hub: Exploiting Digital Twins and Metaverse Technologies in South-Eastern Europe
S. Denazis, Tanya Politi, Evi Faliagka, Christos P. Antonopoulos +11 more
20232023 IEEE International Smart Cities Conference (ISC2)5 citations
Semantic Scholar
Correlations of HTSD to TBP and Bulk Properties to Saturate Content of a Wide Variety of Crude Oils
D. Stratiev, R. Dinkov, M. Tavlieva, I. Shishkova +10 more
2023Processes5 citations Open access
Semantic Scholar
Do the True Boiling-Point Distillation Yields of Crude Oil Blends Obey the Additive Blending Rule?
D. Stratiev, I. Shishkova, Rosen Dinkov, S. Sotirov +7 more
2023Processes4 citations Open access
Semantic Scholar
Empirical Modeling of Viscosities and Softening Points of Straight-Run Vacuum Residues from Different Origins and of Hydrocracked Unconverted Vacuum Residues Obtained in Different Conversions
D. Stratiev, S. Nenov, D. Nedanovski, I. Shishkova +11 more
2022Energies4 citations Open access
Semantic Scholar
Intuitionistic Fuzzy Neural Networks with Interval Valued Intuitionistic Fuzzy Conditions
K. Atanassov, S. Sotirov, Nora A. Angelova
2020Intuitionistic and Type-2 Fuzzy Logic Enhancements in Neural and Optimization Algorithms4 citations
Semantic Scholar
Prediction of the parameters of a Thermoelectric Battery with Neural Network
I. Belovski, T. Petkov, S. Sotirov, A. Aleksandrov
20182018 IX National Conference with International Participation (ELECTRONICA)4 citations
Semantic Scholar
Application of the InterCriteria Analysis Over Air Quality Data
E. Sotirova, Veselina Bureva, I. Markovska, S. Sotirov +1 more
2017International Conference on Flexible Query Answering Systems4 citations
Semantic Scholar
Ituitionistic Fuzzy Estimation of the Generalized Nets Model of Spatial-Temporal Group Scheduling Problems
S. Sotirov, E. Sotirova, Matthias Werner, Stanislav Simeonov +2 more
2016Imprecision and Uncertainty in Information Representation and Processing4 citations
Semantic Scholar
Feed Variability Effect on Performance of a Commercial Residue Hydrocracker
D. Stratiev, R. Dinkov, I. Shiskova, Angel Nedelchev +9 more
2025Processes3 citations Open access
Semantic Scholar
Virtual Reality as Educational Technology
Stanislav Popov, M. Mitkova, Stanimir Surchev, T. Petkov +6 more
20192019 29th Annual Conference of the European Association for Education in Electrical and Information Engineering (EAEEIE)3 citations
Semantic Scholar
Big data, intuitionistic fuzzy sets and MapReduce operators
P. Chountas, K. Atanassov, Vassia Atanassova, E. Sotirova +2 more
20183 citations Open access
Semantic Scholar
Recognition of heat-conductive filling agents of a thermoelectric refrigeration system with Focused Time — Delay Neural Network
I. Belovski, S. Sotirov, A. Aleksandrov, N. Sotirov
20172017 15th International Conference on Electrical Machines, Drives and Power Systems (ELMA)3 citations
Semantic Scholar
A Generalized Net Model of the Neocognitron Neural Network
T. Petkov, Plamena Jovcheva, Zhivko Tomov, Stanislav Simeonov +1 more
2017International Conference on Flexible Query Answering Systems3 citations
Semantic Scholar
Generalized net model of encrypting message in an image using self organizing map neural network
T. Petkov, K. Panayotova, S. Sotirov
20162016 19th International Symposium on Electrical Apparatus and Technologies (SIELA)3 citations
Semantic Scholar
An Application of Neural Network to Health-Related Quality of Life Process with Intuitionistic Fuzzy Estimation
D. Vankova, S. Sotirov, L. Doukovska
20163 citations
Semantic Scholar
Prediction of the parameters of the thermoelectric cooling systems based on Peltier elements with neural network
I. Belovski, S. Sotirov, N. Sotirov, A. Alexandrov
20162016 19th International Symposium on Electrical Apparatus and Technologies (SIELA)3 citations
Semantic Scholar
Game Method for Modelling with Intuitionistic Fuzzy Rules
E. Sotirova, S. Sotirov, Lilia Atanassova, K. Atanassov +2 more
20163 citations
Semantic Scholar
Predicting the amount of toxic metals and metalloids in silt loading using neural networks
Dimitrinka Ivanova, Aleksandar Dimitrov, Y. Tasheva, S. Sotirov +4 more
2025Environmental Monitoring & Assessment2 citations
Semantic Scholar
Intuitionistic fuzzy neural network with filtering functions. An index matrix interpretation
S. Sotirov, M. Krawczak, Diana Petkova, K. Atanassov
2023Notes on Intuitionistic Fuzzy Sets2 citations Open access
Semantic Scholar

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Vassia Atanassova×12

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