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The method based on the solution of a problem of any gap disintegration is offered. It is based on the consecutive solution of the classical equations of small water on the equal plane by the Godunov's method taking into account the influence of current vertical heterogeneity when calculating streams through borders of the cells adjoining step borders. The accounting of vertical heterogeneity is provided...
The paper is dedicated to the study of hydrodynamic effects in the rotors of flow micro-hydropower plants. There was argued the geometry of hydrodynamic profiles of blades efficient in terms of energy conversion efficiency based on which original concepts of hydrodynamic rotors were developed. Using the CAD models of the proposed rotors: there were performed complex CFD simulations of the transient...
The article is focused on dynamic modeling and simulation of pulmonary compartment behaving and response during gas flowing in the lungs. Dynamical simulations based on the differential equations represent time-depended models describing dynamic state of individual gases in the lungs and other tissues. The pulmonary system model includes the two ways: derivation of mathematical model for individual...
This paper describes the experience in using pocket labs, in our case the NI myDAQ, also for interdisciplinary projects in engineering mathematics, electrical engineering and circuit design for first year students.
In recent years, wireless sensor networks have been applied in many application areas. For some fields that have special timing requirement, only wireless sensor networks can not satisfy the needs of high speed communication. We propose a hybrid wired-cum-wireless sensor network by introducing the Contention-Collision Cancellation (C-CC) access control mode, which is an important access control mode...
This paper proposes analytical and numerical models for the measurement process of Eddy-Current (EC) non-destructive testing. EC inspection represents an essential method for the electromagnetic nondestructive evaluation (NDE) of cracks in conductive materials, with its main applications being found in the examination of aircraft, particle accelerators, and other engineering constructions. The method...
This paper present a method of straight path following for trenching works of underwater construction robot. First of all, deriving 3-DOF equation of underwater construction robot for an analysis of fundamental motion performance through a numerical simulation using Matlab. After then, the pure-pursuit method which is the one of the geometric path tracking method is introduced. When derailment of...
This paper presents three-dimensional numerical modeling results for a hybrid stepper motor obtained using the finite element method, in the design stage. The design of the hybrid stepper motor for achieving a specific performance requires adequate geometrical sizing. The study provides for optimal economic and technical solutions obtained through successive improvements made in the design phase,...
This paper proposes methods for the development of mathematical models and for the control of operation modes of technological objects in oil refinery in face of uncertainty based on fuzzy information. The mathematical formulation of the problem of decision-making on controlling modes, which are solved on the basis of mathematical modeling, is formalized and obtained. By using the example of the problem...
The grounding system is the important part of the substation equipment which consolidated the all of equipment units and it is a very branching system. The relevance of the development and use of a mathematical model of the system electrical grounding in the operation is based with the aim of rapid diagnostics of technical condition of the system. The diagnosis process of technical systems represented...
Skill testing different kinematic schemes of nitrogen oxide, used in the numerical simulation of the combustion environment in relation to the burning of coal dust on the basis of one-dimensional and three-dimensional mathematical model of aerodynamics, combustion and heat transfer.
The use of air bubbler systems to improve the Marine environment is a technique that has been applied in a variety of situations with varying degrees of success. In 2005, the research done by Liang et al was regarded as the beginning of the closed air bubbler systems (injecting gas underwater in the vertical pipe). The analysis was a steady-state evaluation of the lifting efficiency of ocean water...
Iontophoresis is a transdermal drug transport technique in which the permeability of various drug molecules is enhanced by applying a direct electric current. In this paper, the distribution of metronidazole (MN) in epidermis and dexamethasone (Dex) in dermis are analyzed through numerical simulation of various transport conditions. Both 2D and 3D models are considered. The corticosteroid has higher...
The juggling is a one of physical skills involving the manipulation of objects for recreation, entertainment, art, or sport. In our research, we focus on the toss juggling. Our research is a mathematical modeling for optimal ordering for toss juggling.
In this paper, a mathematical model for the nipah virus (NiV) infections, commonly known as “nipah fever” in Bangladesh is proposed. The host-pathogen interaction of NiV infection in terms of nonlinear ordinary differential equations (ODEs) is studied. The aim is to investigate the disease propagation and control strategy of NiV infections. The behavior of the dynamics of NiV infections as well as...
While the magnetic field source used in magnetic drug targeting (MDT) therapy is usually a permanent magnet, planar spiral coils (PSC) prove to be equally effective. When properly designed, PSC may provide high magnetic field gradient configurations that result in larger magnetic body forces. To limit unwanted, side effects that may occur, e.g. the overheating of the adjacent tissue, PSCs may be powered...
Micro electromechanical systems (MEMS) are complex devices that consist of structural parts, magnetic materials, and electric coils that interact. Their fabrication relies on complex and expensive technologies therefore accurate design solutions that utilize mathematical modeling and numerical simulations. This paper presents a MEMS bending-mode cantilever microactuator (BCM). Two design solution...
The paper is to investigate dynamic responses of supercritical power plants (SCPP) and study the potential strategies for improvement of their responses for Grid Code compliance. An approximate mathematical model that reflects the main features of SCPP is developed. The model unknown parameters are identified using Genetic Algorithms (GA) and the model is validated over a wide operating range. A model...
By using the method of logical analysis and case study, this essay has discussed the application of mathematical modeling in coaching process control. The conclusion is that the whole implementation process of model training method is based on the index system of training modeling, and use evaluation index system as examination appliance. The development and change of the coaching process are under...
This paper resumes the main mathematical models of Fuel Cells (PEM models). In particular, a comparison study of the various models introduced in the technical literature is presented and the dependency of the various model parameters is analyzed in different operating conditions. As the manifold of the model parameter is very wide and their determination is difficult, it is mandatory to introduce...
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