Walaa Ibrahim Gabr

Walaa Ibrahim Gabr
Benha University · Department of Electrical Engineering

PhD

About

41
Publications
22,568
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402
Citations
Additional affiliations
March 2015 - present
Case Western Reserve University
Position
  • Research Assistant

Publications

Publications (41)
Article
Full-text available
To ensure the global energy demands and decarbonize the production of electricity, the expanded utilization of solar photovoltaics (PV) as a renewable energy resource has been increasing in recent decades, principally with the feasibility to be integrated with the conventional power grid. However, supplying clean power from PV grid-connected system...
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Crossing the boundaries between sciences: The symbolic-based flow aggregation and disaggregation tree-shaped networks opened gates: Graphical Abstract
Article
Full-text available
Wireless sensor network (WSN) is a developed wireless network consisting of some connected sensor nodes. The WSN is employed in many fields such as military, industrial, and environmental monitoring applications. These nodes are equipped with sensors for sensing the environmental variables such as temperature, humidity, wind speed, and so on. In mo...
Article
Full-text available
The tree is a symbol of essence of Life Paradigm. In this regard, Gabr and Dorrah have recently introduced a new symbolic-based flow aggregation and disaggregation modular approach for man-made and natural tree-shaped networks spread in all sciences and disciplines with emphasis to Engineering/technology and Science of Botany. The analysis has show...
Article
Full-text available
This paper develops a recent population-based of Equilibrium Optimizer Algorithm (EOA) for solving the optimal power flow (OPF) problem in hybrid AC/DC power grids. The proposed OPF problem handles several objective functions that reflect multi dimensions economic-technical and environmental operation requirements of modern power systems. The consi...
Article
Full-text available
This paper develops a recent population-based of Equilibrium Optimizer Algorithm (EOA) for solving the optimal power flow (OPF) problem in hybrid AC/DC power grids. The proposed OPF problem handles several objective functions that reflect multi dimensions economic-technical and environmental operation requirements of modern power systems. The consi...
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Gabr and Dorrah IEEE Access Paper Graphs marked with the "Tree Head" and "Tree Feet"
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IEEE Access Paper Short Arabic Summary and Highlights
Article
Full-text available
This paper presents the representation and modeling of real-life tree-shaped natural and man-made networks. It is shown that the tree-shaped networks could be composed of two entities of different functionalities that can operate separately or jointly. The first entity is the feet/head aggregation networks, while the second entity is the head/feet...
Article
Full-text available
This paper presents the new concept of symbolic-based continuous (infinite) modal approach for systems control and operation in varying parameters environment. In this approach, the system is run under varying parameters form where the variations are sensed and fed back in a continuous manner for determining using symbolic-based expressions the cor...
Article
Full-text available
Most types of networks depend on fixed resources in their configuration, but these fixed resources are not effective, especially in the case of a problem in any of these resources. This may lead to a defect in the entire network until the problem is resolved and therefore there must some alternatives for such situations. In this paper, the concept...
Article
Full-text available
In this paper, the first Consolidity-based inhibitors theory of change paradigm is introduced based on the two levels of "Time driven-Event driven" parameters change configuration. The inhibitors are characterized by their ability to slowdown or speed-up the physical systems progress without being part of their mathematical formulations. The new pa...
Conference Paper
Full-text available
Most types of networks depend on fixed resources in their configuration, but these fixed resources are not effective, especially in the case of a problem in any of these resources. This may lead to a defect in the entire network until the problem is resolved and therefore there must be an alternative to replace the fixed resources in such cases. In...
Article
Full-text available
This paper presents a new generic approach for the derivation and implementation of feedback gains of automatic control systems using symbolic-based representation of feedback stabilization functions. The derivation part is based on the exact mathematical symbolic-based formulation of the control problem, where feedback gains are derived in a symbo...
Article
Full-text available
This paper addresses the problem of exact generic symbolic formulation and solution of Parameters Varying Systems (PVS) problems in control, systems, and optimization. Comparisons between the generic symbolic mathematical approach versus various techniques such as the probabilistic (or random), fuzzy, chaotic and other approaches are thoroughly inv...
Conference Paper
Full-text available
Most types of networks depend on fixed resources in their configuration, but these fixed resources are not effective, especially in the case of a problem in any of these resources. This may lead to a defect in the entire network until the problem is resolved and therefore there must be an alternative to replace the fixed resources in such cases. In...
Preprint
Full-text available
Consolidity is a new noun which means both the act and quality of consolidation. The concept was originally developed by Dr. Hassen Taher Dorrah and Dr. Walaa Ibrahim Gabr in the year 2010. Consolidity determines the scaling metrics of system change under effects all over the universe. Moreover, Consolidity provides an effective mathematical-based...
Research Proposal
Full-text available
Inhibitors have a long history of use in psychiatry and neurology as mood stabilizers and anti-epileptics. More recently they are being investigated as possible treatments for cancers, HIV, parasitic and inflammatory diseases. Consolidity (originally developed by Dr. Hassen Taher Dorrah and Dr. Walaa Ibrahim Gabr in the year 2010) on the other ha...
Conference Paper
Full-text available
This paper presents a new generic approach for the derivation and implementation of feedback gains of automatic control systems using symbolic-based representation of feedback stabilization functions. The derivation part is based on the exact mathematical symbolic-based formulation of the control problem, where feedback gains are derived in a symbo...
Article
Full-text available
This paper presents a comprehensive methodology for solving and analyzing quadratic and nonlinear programming problems in fully fuzzy environment. The solution approach is based on the Arithmetic Fuzzy Logic-based Representations, previously founded on normalized fuzzy matrices. The suggested approach is generalized for the fully fuzzy case of the...
Article
Full-text available
This paper is directed toward presenting a novel approach based on “consolidity charts” for the analysis of natural and man-made systems during their change pathway or course of life. The physical significance of the consolidity chart (region) is that it marks the boundary of all system interactive behavior resulting from all exhaustive internal an...
Article
Full-text available
The paper presents a new approach for the modeling, analysis and design of automatic control systems in fully fuzzy environment based on the normalized fuzzy matrices. The approach is also suitable for determining the propagation of fuzziness in automatic control and dynamical systems where all system coefficients are expressed as fuzzy parameters....
Article
Full-text available
The paper presents further development of the Arithmetic Fuzzy Logic-based Representation using the notion of normalized fuzzy matrices. The investigation is based on the dual cell representation, expressed by replacing each parameter with a pair of parentheses, the first is the actual value and the second is corresponding fuzzy level. Various prop...
Article
Full-text available
The paper presents a comprehensive review of the know-how for developing the systems consolidity theory for modeling, analysis, optimization and design in fully fuzzy environment. The solving of systems consolidity theory included its development for handling new functions of different dimensionalities, fuzzy analytic geometry, fuzzy vector analysi...
Article
Full-text available
The paper presents further development of the Arithmetic Fuzzy Logic-based Representation using the notion of normalized fuzzy matrices. The investigation is based on the dual cell representation, expressed by replacing each parameter with a pair of parentheses, the first is the actual value and the second is corresponding fuzzy level. Various prop...
Article
Full-text available
This paper establishes the foundation of new systemstextquoteright Consolidity Theory using the Arithmetic Fuzzy Logic-Based Representation approach for investigating the internal behavior of systems operating in fully fuzzy environment. Consolidated systems are defined as being stable at the original state, but due to fuzzy variations in their inp...
Conference Paper
This paper establishes the foundation of new systems’ consolidity theory based on Gabr and Dorrah newly developed Arithmetic Fuzzy Logic-based Representation. Several examples were provided for demonstrating the applicability of the new approach for the consolidated, neutrally consolidated, or unconsolidated cases. It is shown that the new theory c...
Conference Paper
Full-text available
The paper presents a new approach for the fuzzy modeling and analysis of automatic control systems in fully fuzzy environment. The proposed technique is based on the normalized fuzzy matrices and is an extension of the Arithmetic and Visual Fuzzy Logic-based Representations developed recently by Gabr and Dorrah. The approach is also suitable for de...
Conference Paper
Full-text available
The paper presents further development of the Arithmetic Fuzzy Logic-based Representation using the notion of normalized fuzzy matrices. The investigation is based on the dual cell representation, expressed by replacing each parameter with a pair of parentheses, the first is the actual value and the second is corresponding fuzzy level. The analogy...
Conference Paper
Full-text available
This paper is directed towards the development of the Arithmetic and Visual Logic-based representations for classical nonlinear systems modeling and optimization. The concept was originally proposed by Gabr and Dorrah for linear system using the notion of the normalized fuzzy matrices. In this concept, the arithmetic fuzzy logic-based representatio...
Conference Paper
Full-text available
This paper presents the development of fuzzy logic representations using the notion of normalized fuzzy matrices developed by Gabr and Dorrah [1-4] for solving quadratic programming problems in a fully fuzzy environment. The first is the arithmetic type based on dual cell representation, expressed by replacing each parameter with a pair of parenthe...
Conference Paper
Full-text available
This paper is directed towards developing two new fuzzy logic-based representations for systems modelling and optimization using the notion of the normalized fuzzy matrices. The first is the arithmetic type based on dual cell representation, expressed by replacing each parameter with a pair of parentheses, the first is the actual value and the seco...
Conference Paper
Full-text available
This paper presents a new formulation of multi-objective linear optimization using the fuzzy logic-based arithmetic (or visual) representations developed originally by Gabr and Dorrah. A modified dual simplex algorithm is proposed as part of the formulation implementation procedure operating in a fully fuzzy environment. Moreover, forward and backw...
Conference Paper
Full-text available
The foundation of new Fuzzy Logic Level Arithmetic and Visual representations, normalized fuzzy matrices, and the principle of fuzzy logic-based level tracking were developed by Gabr and Dorrah for systems modelling and optimization during all stages of formulation and solution. This new concept has an unlimited scope of generalizations and extensi...
Thesis
Full-text available
This thesis is directed towards developing two new fuzzy logic representations for systems modeling and optimization using the notion of the normalized fuzzy matrices. The first is the arithmetic type based on dual cell representation, expressed by replacing each parameter with a pair of parentheses, the first is the actual value and the second is...

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