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Prosthesis has been advancing since the day of its introduction, having a tremendous degree of advancement and examination in clinical field as well as in robotics. This has been an influence for researchers who made it conceivable with various types of prosthetics that are accessible these days in the market both commercially and uniquely crafted. This paper throws light on numerical simulation and design of a prosthetic leg. The work focuses on the optimization and simulation of a prosthetic leg, improving its strength and making it cost effective. The paper has described the design and analysis of two early-existed models of prosthetic leg, comparing their strength and durability through different material analysis and thereafter designing a new model with better strength, having a high deformation rate or durability, and having much cost-efficient design and material. The Finite element analysis (FEA) was done in Ansys software, the material properties and cost efficiency were kept in mind during the analysis as well as during selection of material. Prosthetics are modified for every person, remembering the utilization and actual properties. In any case, the conventional prosthetics are heavier, and the production is costly andtedious. The current study resolves this issue and proposes an elective plan for prosthetic legs. The designed prosthetic was simulated properly and has been compared with earlier existed models. The study concludes that the new design is much more efficient and user friendly that the wearer will feel comfortable, to live a normal life. [ABSTRACT FROM AUTHOR]

This paper discussed the transmission dynamics of discrete SEIR model. It is possible to determine the prerequisites for the endemic and disease-free equilibria, as well as their local stability. In addition to demonstrating the validity of our findings, the numerical simulations also display more sophisticated dynamical characteristics such as the chaos phenomena, flip bifurcation, and Hopf bifurcation. These findings demonstrate that, as compared to models for both continuous and discrete epidemics exhibits far richer dynamical features. [ABSTRACT FROM AUTHOR]

Abstract. In this paper, a prey, predator and apex predator food 4chain model4 is proposed and analyzed. The model includes the impact of fear on solution dynamics. All feeding processes in this ecological model are formulated in terms of Crowley-Martin-like functional responses. The primary goal of this work is to find the existence condition, uniqueness and boundedness of the solution. The second goal is to study the local and global stability of these solutions. Finally, the analysis results are verified by numerical simulation. [ABSTRACT FROM AUTHOR]

The paper discussed the problems related to a linear quadratic regulator (LQR) synthesis for the control implementation in a semi-active car suspension. The control is a combination between the state's feedback and compensation by the excitation. For this purpose, the state and the input disturbance are reconstructed using the observed variables. The physical nonlinearities of the controllable magneto-rheological semi-active damper are considered. The regulator structure also includes a model of the inverse magneto-rheological damper, based on neural networks. A "Quarter car model" is used for the vehicle suspension modelling as enough adequate and appropriate for real-time control. The main contribution of the research is the approach for determining the weight matrices of the regulators, based on a formulated multicriteria problem, and solved based on the Game Theory. Numerical simulations are given, allowing for comparison of the results, and confirming the effectiveness of the presented approach. [ABSTRACT FROM AUTHOR]

Quantum technology is a candidate for the sixth generation of telecommunications (6G) in 2030. This paper proposes a new quantum coding scheme in the class of Calderbank-Shor-Steane (CSS) codes based on the Reed-Muller codes, since Reed-Muller codes are one of provably classical Shannon Capacity achieving codes. This paper keeps the proposed new codes simple by making dual-containing CSS codes having Hx = Hz, such that no further search is required for Hx or Hz. The proposed quantum Reed-Muller codes are designed from the classical Reed-Muller codes with puncturing to obtain new codes with block-length of n = 7 qubits capable of error correcting t = 1 qubit error and quantum information of k = 1 qubit, of which the extension to other block-lengths are expected to be straightforward. This paper performs a series of computer simulations to evaluate the quantum word error rate (QWER) performances under the depolarizing channels. The proposed quantum Reed-Muller codes satisfy the stabilizer codes requirement, where the diagonal element of symplectic inner product (SIP) is kept zero to guarantee a successful error correction. The proposed codes have a structure with a length close to that of the perfect quantum codes. Our results confirm that the stabilizers of the proposed codes can extract the syndrome and distinguish all error patterns of any single qubit error. This paper also confirm that the simulated performances are agreed by the theoretical QWER performances indicating that the both coding design and simulation environment are correct. These results confirm that the classical Reed-Muller codes can be used directly as QECC by puncturing the parity check matrix H. The results of this paper are expected to open new ground on the invention of new quantum codes derived from the classical codes. [ABSTRACT FROM AUTHOR]

For the design of feed sections in single-screw extruders, analytical methods are increasingly being replaced by numerical methods. One possibility for numerical process modeling of solids conveying is offered by the discrete element method (DEM), which is able to calculate individual particle movements and interactions. With DEM it is possible to determine quantities that are difficult to measure and get insight into physical processes. In this paper, dissipation in the solids conveying section is calculated with the help of DEM, since conventional analytical methods until to now are not able to provide precise results due to the complexity of the pellet movement. A specific analysis of the possibilities for dissipation calculations in the solids conveying section is carried out with the software EDEM. Two fundamentally different approaches are compared. On the one hand, the temperature increase is simulated directly via a user-defined contact model, on the other hand, an average temperature increase is calculated indirectly via a macroscopic energy balance. The description of dissipated energy as a result of friction is particularly important as it leads to a direct increase in the temperature in the solids conveying section. For a correct screw design, knowledge of the temperature in this section is essential, as melting of the material inhibits effective solids conveying. Therefore, this paper focuses on the determination of the quantities of the friction work and the resulting temperature. [ABSTRACT FROM AUTHOR]

Additive technology (AM) using selective laser melting (SLM) is widely used to produce parts with complex shapes made of metal alloys, composites and ceramics. One of the main problems of SLM is ensuring dimensional accuracy. The paper presents the study of the influence of selected parameters of the SLM process, such as laser power, scanning speed, distance between tracks, powder layer thickness and volumetric energy density on the dimensional accuracy of the product. The mathematical model was obtained based on a dimensional analysis describing the dependence of the SLM process parameters on the dimensional deviations of the product. Computer simulation of the SLM process was carried out using COMSOL Multiphysics® software. Theoretical results were verified experimentally on Cr-Co alloys. [ABSTRACT FROM AUTHOR]

The paper analyzes the influence of the adaptive mechatronic system parameters on the process of stabilizing the step of moving materials during automatic assembly. Dependences of variances and mathematical expectations of the displacement step are obtained depending on the parameters of the system under a random external action. Numerical simulation of the operation of the algorithms used is carried out, recommendations are given for the optimal choice of system parameters. [ABSTRACT FROM AUTHOR]

In this paper, a system of nonlinear partial differential equations describing the spread of viruses in computers has been solved using the Exp-Function method, studying the solution for these types of systems helps to mitigate the effects of viruses by predicting their occurrence, in addition to that, the effect of parameters on the behavior and spread of viruses is studied. Figures are present to illustrate the effect of parameters in solving the nonlinear system. [ABSTRACT FROM AUTHOR]

The paper presents a procedure for numerical simulation of the air permeability in the transversal direction of protective face masks. Two types of three-layer face masks were considered, and their air-permeability was experimentally measured together with the masks' structural, geometric and mass characteristics. Two simulation approaches were tested with the actual thickness of the mask (Model 1-1) and a scaled model, corresponding to 4 times augmentation of the mask's thickness (Model 1-4). A total of 12 steady-state simulations were conducted with a complete comparative analysis between the two models and the two masks (porous medium). An adapted ENGYS® version of the computational code OpenFoam® was applied. The numerical results were verified with the experiments and showed a very good correlation. [ABSTRACT FROM AUTHOR]

This paper presents numerical simulations using an open boundary algorithm with modified dynamic boundary condition (mDBC) for weakly compressible smoothed particle hydrodynamics models from particle-based code Dualsphysics. The problems of piping erosion in earth dams are aimed at studying the algorithm. The case 2D model of fluid flow past around a fixed cylinder is simulated, where various values of Reynold's numbers (Re 20 to Re 100) and different viscosity terms are considered. A constant velocity with different values of viscosity for generating various Reynold's numbers is modeled. The interaction between solid particles of the cylinder and fluid particles is concerned, the cylinder is affected by the hydrodynamics force caused by the flow of fluid particles. The solid particles of the cylinder are the observation points to obtain force and pressure due to the hydrodynamics forces. As a result of the simulation which is to show the capability to model 2D fluid flow with various Reynold's numbers. Drag coefficient, lift coefficient, and Strouhal number are compared to the previous work from literature. [ABSTRACT FROM AUTHOR]

NNW-UGKS, an engineering-oriented solver package based on the Unified Gas Kinetic Scheme(UGKS) for flows covering various regimes, is briefly introduced in the current paper. Then the hypersonic flowfield around a sharp-edged vehicle at high altitude is simulated with NNW-UGKS. The aerodynamic force coefficients, the pressure, the stress and heat distributions on the surface are compared with DSMC results. Good agreements have been achieved. [ABSTRACT FROM AUTHOR]

In this paper, a two-temperature nonlinear coupled constitutive Relations (NCCR) model is utilized to simulate the flows over a flat plate. The two-temperature NCCR model is implemented by involving the rotational relaxation term for the rotational energy equation. Thus, the rotational temperature and translation temperature in the flow field could be obtained simultaneously. The flow contours and temperature profiles over the flat plate are compared with those of multiple-temperature Navier-Stokes (NS) solver. The final results show that the two-temperature NCCR model would reproduce the solutions of NS solver at Ma=2. However, it behaves quite differently from the NS solver at Ma=5. It is also noted that the rotational temperature and translational temperature are close to each other at Ma=2. In contrast, the rotational temperature and translational temperature are totally different at Ma=5. [ABSTRACT FROM AUTHOR]

The development of blast-protective devices that direct blast and shock waves resulting in HE explosion to the safest side for humans and engineering constructions remains an urgent task in modern conditions. To optimize the design parameters of blast protection means, comprehensive research is required and the development of an optimal methodology that can help to improve the existing protective characteristics of those devices. The first stage in this direction is the study of an elevated (caused at some height above ground or floor) open explosion using experimental, analytical and numerical methods. In this paper, we obtained an assessment of the parameters characterizing the explosion of a 0.2 kg TNT charge. The features of shock wave propagation in an open explosion are determined using experimental, analytical and numerical methods. Authors revealed that it is necessary to use numerical methods with caution in modeling and decision-making. [ABSTRACT FROM AUTHOR]

To assess the potential capabilities of computer systems (CS), indices of the realizability of solving tasks are used. These indices characterize the quality of the systems, taking into account the reliability of the CS and the parameters of the tasks. These estimates become relevant when scalable computer systems are considered. For example, 93% of the TOP 500 supercomputers are cluster-type systems that are scalable. Failures in such systems, which directly depend on the number of computing nodes, significantly reduce the efficiency of solving tasks. The paper presents a description of mathematical model of computer systems with accumulator in group servicing task flow. The mathematical model is based on the methods of queuing theory. The paper offers solutions for calculating indices that allow us to assess the fullness of the accumulator and understand how the size of the group affects the fullness of the one. The obtained analytical solutions are aimed at express analysis of the functioning of CS. [ABSTRACT FROM AUTHOR]

In the recent few years, ICT Tools are popular in education to increase student's knowledge and interest. There is still lack of awareness of what kind tools are available. This paper presents a review of some applications/tools used for educational purposes and to improve student's educational growth and knowledge especially for computer engineering students. In this digital world, tools like animation, polls, quizzes, etc. are very amazing thing to include as part of subject activity. We wrote in this paper about different ICT tools along with their pros and cons to help faculties to decide the type of tool they can embed with their teaching learning methodologies according to their subject need. [ABSTRACT FROM AUTHOR]

NORM (Naturally Occurring Radioactive Material) and TENORM (Technologically Enhanced Naturally Occurring Radioactive Material) were introduced in Government Regulation No. 33 Year 2007 as part of the chronic exposure situation. The supervision on NORM and TENORM has changed in recent years. Despite the dynamics of development during this period, the focus of supervision is concentrated minerals contain radioactive. This paper aims to identify the concept of dose assessment in the supervision of radioactive concentrated minerals. The methodology used in this paper is a literature study of regulations, international recommendations, and practices from the other countries. The activity concentration of uranium and thorium decay series, and potassium remains the main basis for supervision. The practice of Australia and Malaysia, as well as the IAEA recommendations use the concept of a graded approach. The activity concentration as a basic starting point for the next assessment process. Dose assessment means an assessment of an individual or group of people. Dose assessment should take into account the various possible exposure pathway scenarios from the source to the receptor. The exposure pathway and number of exposure scenarios depends on the variety of scenarios from location and operation/activity. Some of these variations will provide a level of difficulty in developing exposure scenarios. Dose assessment can be done by comparison of measured radionuclide concentrations to reference levels, spreadsheet analysis using dose coefficient tables, or computer modeling. [ABSTRACT FROM AUTHOR]

In this paper, a kinematic model of a mechanically couple platoon of two car-like vehicles is developed. Two different forms of the kinematic equations of motion are derived depending of the generalized coordinates used for the system description. The kinematic model is obtained in the form of a nonlinear driftless control system which is affine in the control inputs and can be employed for the design of different types of low-speed steering controllers for the following vehicle in the vehicle platoon. A linear feedback steering control for the following vehicle in the platoon is designed. Computer simulation tests using the derived kinematic equations of motion of the vehicle platoon along a curved path are carried out, in order to evaluate the validity of the developed kinematic model of the mechanically coupled car-like vehicle platoon and steering control. [ABSTRACT FROM AUTHOR]

The use of numerical simulations to obtain drag coefficient values cd for flow around a rough cylinder in the subcritical and critical Re number regions were the aim of this paper. The model of the cylinder with the trapezoidal waves on the surface was calculated. The results from simulations were compared with standard and available experimental results obtained by measuring of a rough cylinder with similar parameters of the relative roughness and flow regime. ANSYS Fluent software using the RANS SST k-ω turbulence model was chosen for the numerical simulations. This comparative study confirms the influence of the density and shape of protrusions on the value of the drag coefficient and thus on the shift of the position of the of cd drop to lower Re numbers. [ABSTRACT FROM AUTHOR]

The trend towards the application of external thermal insulation composite systems (ETICS) on energy efficient façades under hot climatic conditions, is becoming increasingly important for energy saving in summer (summer heat protection). However, both the construction and the performance of the system should be investigated to ensure the functionality and the avoidance of damage. In this paper, the development and the functionality of ETICS as well as the analysis of measurement data for solving building-climatology challenging planning tasks in warm countries is presented. Related to the measurement data collected in a real case study, the results of a hydrothermal simulation tool are validated. Based on this, the use of thermal insulation under hot climatic conditions, for energy saving in summer, has been verified and the implementation into a simulation model is shown. For the verification of results, a case study in the campus of the American University in Ras al Khaimah (RAKRIC), in United Arab Emirates (UAE) was chosen, in which interior and exterior temperature and relative humidity values were measured. Even with the peculiarity of an irregular user behavior of the building, good accordance between measured and calculated values could be achieved. The optimized building design, facilitating a damage-free operation and a low building energy consumption, is presented in detail and essential optimization steps are discussed. Based on the analysis and evaluation of measurement data as well as the implementation of hygrothermal simulations, the presented study provides a guideline for planning of ETICS with respect to southern climate conditions. [ABSTRACT FROM AUTHOR]

In this paper, the filling process of micro-fluidic chip is simulated by Moldflow software. The volume shrinkage, cavitation, weld line and warpage deformation were studied. The simulation results show that the micro-fluidic chip can be completely filled and the surface molding quality can meet the application requirements. The numerical simulation results can predict the quality of injection molding micro-fluidic chip in actual production, and have important guiding significance for the optimization of process parameters and the design and modification of mold. [ABSTRACT FROM AUTHOR]

In this paper, the screw configuration of the intermeshing co-rotating twin-screw extruder for TPV is designed and numerically simulated. According to the mixing and conveying performance of conventional screw elements, kneading disc elements and toothed disc elements, four screw configurations in the mixing section of the extrusion system suitable for TPV mixing task are designed. The mixing process of materials in the channel under these four screw configurations is simulated by POLYFLOW software, and the results are analyzed to select the best screw configuration. [ABSTRACT FROM AUTHOR]

The paper focuses on methods for dynamic analysis used in modern construction. The analysis of experimental data of the building, after action of seismic loading is used. Described technique enables the user to simulate behaviour of the structural system of a building based on the finite elements developed and implemented in LIRA-SAPR program. The technique allows solving dynamic problems taking into account physical nonlinearity. [ABSTRACT FROM AUTHOR]

This paper devotes to the numerical simulation of Van der Pol equation using fix and variable step size methods. The solution is obtained via two different methods of Runge-Kutta of order 5 (RK5) for fix step size and Runge-Kutta Fehlberg method (RKF) of order 5 for variable step size. The algorithms of fix and variable step size of RK5 and RKF methods, respectively are developed and coded in Matlab for model simulation. Local and global errors are computed for non-stiff and stiff problem of Van der Pol equation. RKF method using variable step size show low values of error for stiff problem with less number of iteration, hence indicate good performance of the method in approximating the solution of the Van der Pol model. [ABSTRACT FROM AUTHOR]

This paper discusses the design, simulation and construction of a two-wheeled self-balancing vehicle system. The model is designed with the help of Solid works 2018 computer modeling software, once the design calculations are perfect in all aspects. And structural analysis is carried out using Ansys R21. After the development of prototype, when the vehicle loses equilibrium on either side, spinning disc with hub motor attached in chassis acting as a gyroscope to provide counterbalance force (gyroscopic effect). This vehicle uses heavy mass rotor with higher inertia for better balancing. Two-wheeler has two wheels which acts as a gyro, it generates the necessary torque for self-balancing at greater speeds. But it creates a little amount of torque at slower speeds. The vehicle will be tested with zero precession velocity at first. The action of the handlebar must also be arrested. And the experiment involves balance at rest as well as at a slower speed. The vehicle's precession movement is stopped, and it moves in a straight path and test for balancing. As a result, to get a reactive gyroscopic torque, gyroscope was used for balancing. [ABSTRACT FROM AUTHOR]

The paper presents the results of numerical simulation of the airflow as compressible viscous heat-conducting medium in the tear-off zones arising near the surface of a high-speed aircraft having a segmental-conical shape blunted frontally to the oncoming flow. The developed mathematical model is based on solving the discrete analogs of the equations of gas dynamics on a structured computational grid for compressible viscous heat-conducting chemical neutral gas. For turbulence modeling two equation of the SST k-w model were added to Navier-Stokes equations. The presented results of modeling are compared with experimental data. The conclusions are made about the correctness of the application of the presented mathematical model for the prediction of flow parameters in tear-off zones. [ABSTRACT FROM AUTHOR]

This paper presents the results of numerical simulation of the airbag module dynamics in cars relating to the passive safety system. A mathematical model of the airbag inflation process using the corpuscular particle method was developed and implemented. This approach, as against the control volume method, allows the correct calculation of situations in which the interaction between the airbag and objects occurs before the full airbag deployment. According to the algorithm of this method, the airbag inflating process takes place under the influence of the flow of sphere-shaped particles, which are essentially ensembles of a set of real gas molecules. The implemented model allows to perform numerical calculations of the airbag interaction with the dummy model. The airbag simulator is a closed control surface modeled by a set of fully integrable shell Belichko-Tsay finite elements. A model of multilayer fabric orthotropic material was used as a model of the mechanical behavior of the airbag material. A model of the mechanical behavior of the airbag material is a model of multilayer fabric orthotropic material. The created mathematical model makes it possible to investigate the processes of functioning of newly developed and tested airbag modules for advanced vehicles. The developed model was verified by comparison with an experiment on airbag deployment. [ABSTRACT FROM AUTHOR]

The overall lateral stability of the structural system for residential buildings relies mainly on the precast concrete wall panels as a lateral resistance system. Hence, the connection between the wall panels plays a crucial role in providing structural integrity. On the other hand, the interaction effect of interfaces between the precast and post-cast concrete of the wall panel and the intermediate joint directly impacts the structural capacity and integrity of the connected parts and the overall structural system. Therefore, numerically remains challenging for many researchers to simulate the interaction of the interfaces between the concrete cast at different times. Thus, the researchers of this paper aimed to simulate the precast concrete wall-to-wall connection using Abaqus Software to investigate the impact of casting concrete at different times on the capacity of the joint and overall integrated wall panel under lateral monotonic loading. Based on the findings, the load displacement showed good composite action. However, the interaction effect of interfaces due to casting concrete at different times reduces the initial stiffness, expedites the yielding, and delays the hardening stage. On the other hand, as the displacement was applied at the top of the left panel, the load transfer mechanism between the wall panel caused stress concentration at the interfaces between the intermediate joint and the left wall panel. [ABSTRACT FROM AUTHOR]

The Seismic isolation of bridges has greatly enhanced during the last decades. The scope of the paper is carrying out an investigation on how the properties of the double concave friction pendulum (DCFP) devices influence the seismic performance of isolated multi-span continuous deck bridges. The numerical simulations are performed conceived an eight-degree-of-freedom model able to reproduce the elastic behavior of the pier, along with the assumption of both rigid abutment and rigid deck; furthermore, according with experimental evidences, a non-linear velocity-dependent behavior has been adopted for the two surfaces of the double concave friction pendulum isolators. The model has been conceived withstand a set of natural records with different characteristics. The work comes out with the statistics related to the relevant response parameters are computed in non-dimensional form with respect to the seismic intensity considering different properties of both DCFP isolators and bridge. [ABSTRACT FROM AUTHOR]

The Seismic isolation of bridges has greatly enhanced during the last decades. The scope of the paper is carrying out an investigation on how the properties of the double concave friction pendulum (DCFP) devices influence the seismic performance of isolated multi-span continuous deck bridges. The numerical simulations are performed conceived an eight-degree-of-freedom model able to reproduce the elastic behavior of the pier, along with the assumption of both rigid abutment and rigid deck; furthermore, according with experimental evidences, a non-linear velocity-dependent behavior has been adopted for the two surfaces of the double concave friction pendulum isolators. The model has been conceived withstand a set of natural records with different characteristics. The work comes out with the statistics related to the relevant response parameters are computed in non-dimensional form with respect to the seismic intensity considering different properties of both DCFP isolators and bridge. [ABSTRACT FROM AUTHOR]

In this paper, a frequency reconfigurable planer antenna with defected ground plane (DGP) is presented for covering two wireless standard applications bands (2 GHz and 5.2 GHz). Where a parasitic element is added on the ground plane to shift the frequency range from 5.2 GHz to 2 GHz after connect it with the ground layer. The addition of the parasitic element with the ground plane helps to switch to the lower frequency without modifying the geometry of the antenna. Additionally, it avoids the disturbance that could happen due to adding a radiation element such as PIN or varactor diode close to the antenna radiation layer. Computer Simulation Technology (CST) microwave studio is exploited to simulate the model and obtain better results. Then, the antenna was fabricated and measured practically for validation and comparing the measurement results with the simulated results. [ABSTRACT FROM AUTHOR]

Kriging models are statistical methods for approximating and estimating computer models. Kriging models have been used to replace time-consuming computer models with fast-running alternatives. Kriging models are constructed based on some assumptions. Thus, if these assumptions are not suitable and consistent with the computer model outputs, inferences and results of the Kriging models will not be accurate. Therefore, KMs need to be subjected to validation measures before using them in different areas of science. In this paper, we propose some measures that can be used for validating Kriging models. These measures are based on comparing KM predictions and computer model outputs. We investigate the performance of the proposed measures via some real examples of computer models, the Borehole model, and the Piston Simulation function. [ABSTRACT FROM AUTHOR]

This paper presents a novel breast model system based on a UWB antenna for locating a tumor cancer. The antenna that describes total size of 35mm*20mm*1.6mm is recognized by 120 % ultra wideband and 3 GHz-11 GHz frequency rate FCC (figural communication compety) band. Evident matching of impedance is shown on suggested antenna, omnidirectional radiation model with high earning. The outcomes of measurement are clarifying the performance of suggested antenna, the antenna is being fulfilled in a system model designed with insulating characteristics of human breast able to uncover the odd objects. Detailed study of size and exact location of tumor is performed for accurate tumor detection. The maximum specific absorption rate is specified for accurate detection of breast tumor. Furthermore the outcomes indicate precise detection of tumor can be achieved with performance of suggested antenna. The breast model system was being evolved by CST (computer simulation technology). [ABSTRACT FROM AUTHOR]

In this article, a method and some results of the numerical simulation of the effective elastic properties of core samples are described. The method consists in carrying out a series of stress-strain calculations on a 3D digital model of a core sample. The digital model is a voxel structure obtained from core sample CT scan data. Based on the features of the core sample, a representative volume is determined, on which several static boundary value problems of elasticity with different boundary conditions are solved. A digital core sample model can contain up to one billion voxels and more. Therefore, the relaxation method and the finite difference method (FDM) with explicit time scheme, which do not require a large amount of RAM during the calculation, are used to solve static elasticity problems. In addition, the calculations are parallelized using the CUDA technology for high-performance GPU computing. The effective mechanical properties of the core sample are estimated by averaging over RVE generalized Hooke's law using the results of solving each static problem. The paper presents GPU calculation results for two core samples: sandstone and limestone. The calculations are carried out on full-size core samples. The comparison of results for small core fragments with CAE Fidesys is carried out for verification. [ABSTRACT FROM AUTHOR]

The relevance of research is driven by the need to expand the possibilities of an explosion action controlling to obtain a rational rock mass fragmentation, the requirements to improve the safety of mining working, as well as the economic feasibility of reducing the loss of minerals and eliminating negative environmental factors of blasting. The paper presents some regularities of the radial air gap value influence for the TNT and ANFO charges on the yield of fractions during geo-environment explosive failure. The investigation were carried out experimentally on compositional models and numerically by the Smoothed Particle Hydrodynamics method (SPH). The article considers the methodological issues of combined application of compositional axisymmetric models and computer simulation for dynamic loading problems solving of the massive to identify patterns of stress localization and rock fragmentation. The research results made it possible to determine the dependences of the change in the middle rock piece and the yield of fines on the radial air gap value. In addition, the influence of the distance to the charge on the yield of the middle rock piece at different explosive densities was established. The developed research methodology makes it possible to determine numerically the influence of various factors on the nature of stress localization and to identify the trigger effect of the geo-environment explosive failure. The results comparison of processing physical experiments and computer simulation shows that the chosen approach ensures the reliability of the research results and turned out to be very useful for analyzing and better understanding the rock massive explosive failure mechanics. The results comparison for physical experiments processing and computer simulation shows that the chosen approach ensures the reliability of the research results and turned out to be very useful for analyzing and better understanding the rock massive explosive failure mechanics. [ABSTRACT FROM AUTHOR]

In this paper the numerical approximation of a fluid-structure interaction problem is described with the main atten-tion paid to the simulation of computational models of human phonation process. The mathematical formulation of the problem is described that allows to treat the numerical simulation of the vocal folds contact resulting in the flow domain closure. The mathematical model is described, numerically approximated and numerical results are shown [ABSTRACT FROM AUTHOR]

The use of BIM technologies today largely determines the course of modernization of the construction industry. Computer modeling of structural elements of buildings and structures, the use of CAD software systems for automating work at the stages of design and technological preparation of production can reduce the time required to complete design developments, improve the quality and reliability of the design and manufacture of elements and components of steel structures. A distinctive feature of BIM technologies is the need to include in the information base all the properties of objects used in the model. This approach allows you to combine the geometric and informational parts of the project. The 3D model format facilitates the process of optimizing architectural and design solutions, comparing several competitive options. The unified model eliminates any inconsistencies that arise when combining adjacent sections of the project. The result is a solution to the problem at the initial stage, and not a departure from it, when the error is already irreparable. The technique of creating a solid-state model of a core system node is described, which allows analyzing the operability of the node at the stage of computer modeling, choosing its optimal parameters. The paper presents a visualization of models of individual parts and assemblies, taking into account all the features. The final stage of the design was the creation of a hinge assembly. There is a possibility of further investigation of the bearing capacity of the node with the help of calculation complexes based on the created solid-state model, translated into finite element packages of application programs. Modern software tools in the vast majority of cases allow you to completely or partially abandon the full-scale experiment, transferring everything to the field of computer modeling with the involvement of CAD systems. The more work is carried out using CAD systems and the more three-dimensional graphical models of new structures and assemblies are developed, the more tempting it seems to use computer analysis. The use of CAD systems makes it possible to achieve significant progress in automating the process of preparation and execution of design documentation, information support for the design and decision-making process, unification of design solutions, when using reusable design solutions, replacing field tests and mock-up with digital modeling. [ABSTRACT FROM AUTHOR]

The paper presents the finite element modeling of the spatial heat transfer to identify the temperature and the heat flux distributions both in the linear and point thermal bridges in various up-to-date wall systems. The paper considers the spatial heat transfer in the corner zone of the brickwork fragment. The ANSYS finite element program is used for the numerical simulation of the temperature fields and thermal fluxes for the brickwork connection with a hollow-core slab and a balcony slab. The influence of hollow cores in the floor slab is considered in relation to the temperature behavior along the inner surface of the brickwork fragment. To eliminate the negative effect from thermal bridging, it is suggested to increase the temperature on this inner surface. The brickwork thermal properties are investigated herein. [ABSTRACT FROM AUTHOR]

With wireless communication's rapid expansion, the accessible spectrum is becoming increasingly congested since the spectrum is a scarce resource and cannot be divided into infinity to accommodate each application. In addition, new wireless technologies need significant bandwidth (BW). As a result, there is a need to find a solution to such problems. Cognitive radio (CR) technology is the key to the issue of inefficient use of the spectrum. Spectrum Sensing (SS) is the key step in CR, enabling it to distinguish between spectrum states (busy or idle). This research aims to design a real-time SS system that can improve the use of the spectrum. This paper assesses the performance of the Energy Detector (EDR) technique. The first detector is an energy detector with a static threshold, while the second is an energy detector with an adaptive threshold depending on the total mean of the signal received. It is concluded that the suggested adaptive threshold method gives a better probability of detection (Pd) than the static threshold in low SNR values. The computer simulations were performed using LabVIEW NXG, and the practical implementation was done using the X310 Universal Software Radio Peripheral (USRP) platform. [ABSTRACT FROM AUTHOR]

This paper presents a chaotic jerk circuit model concerned with a stochastic fractal-fractional order α, β ∊ (0, 1] by adding external white noise to the input voltage. A new differentiation operator as the convolution of the power law is investigated. The new operators will be pointed to fractal-fractional differentiation and integration in the Riemann-Liouville (R-L) sense. Some sufficient conditions are achieved for the existence and uniqueness of solutions for considered framework by employing the Banach contraction principle. Finally, numerical simulation is provided to confirm the theoretical consequences. [ABSTRACT FROM AUTHOR]

Inventory is one of the important things in an agency or individual engaged in distribution. One of the main activities in a goods distribution service company is inventory control with the aim of minimizing inventory costs. The aim of this paper is to construct a mathematical model for warehouse inventory and optimize it to get the least cost. The proposed mathematical model is the EOQ (Economic Order Quantity) model. The model used is in a probabilistic environment. The step of the method i.e., determines the components of inventory costs, namely, ordering costs, transportation costs, storage costs, and purchasing costs. Then formulate a total inventory cost model and then proceed with the optimization of the model. And the last step is to do a numerical simulation as a real test of the model created. [ABSTRACT FROM AUTHOR]

Electroplated plastic parts are mainly produced by injection molding of acrylonitrile butadiene styrene (ABS) or polycarbonate/acrylonitrile butadiene styrene (PC/ABS). However, polyamide (PA) has superior physical properties, but the coating quality is inferior leading to higher scrap rates up to 30 %. Besides the electroplating parameters, the coating quality depends on the surface of the injection molded part. Former published experimental investigations and analysis of three-dimensional surface key figures according to DIN EN ISO 25175 showed that injection molding parameters significantly influence the surface layer of the produced mineral-filled polyamide parts. The aim of this paper is to present causes for the differences in the surface structure of mineral-filled polyamide. Therefore, a Design of Experiments (DoE) is carried out using 3D injection molding simulation software to determine effects that cannot be measured in the real process. The results of shear rate, temperature and degree of crystallization are evaluated at four different positions on the plastic part. Furthermore, the results are related exemplarily to the height parameter Sa of the real experiment. [ABSTRACT FROM AUTHOR]

Organic Rankine cycle (ORC) is one of the solutions for recovering waste heat into useful power output. Low-grade waste heat from various sources can be converted into electricity using ORC in many different aspects. The typical ORC systems in the market often require large amount of waste heat as the waste heat sources. Although the thermal efficiency for marketed ORC is reasonable, it will not be practical in the condition of limited available energy from small-scale waste heat or low temperature heat sources. Hence, this paper presents the numerical simulation of small-scaled ORC using design model developed in MATLAB to study the thermal efficiency of various working fluids in limited working conditions. The fluid properties were obtained from CoolProp library. Result shows that R123 has the highest thermal efficiency of 7.25% with net power output of 4.09kW for this small-scaled ORC. The ranking of refrigerants as working fluids used in the designated working condition is also presented. [ABSTRACT FROM AUTHOR]

The paper is dedicated to identification and computational study of control laws for a spaceplane's ramjet aimed at providing a target value of thrust and impulse. An algorithm to identify the law of fuel mass flow rate control that provides a target value of thrust has been developed and implemented on software level. Resultant control laws have been verified by numerical simulation data. [ABSTRACT FROM AUTHOR]

The paper considers a relatively simple method for creating interactive electronic models of physical systems that does not require programming and automatic generation of numerical models of complex physical systems. The created training models are available for use via the Internet and allow almost unlimited on-line editing by users. The options of using the created electronic models to support mass individualized learning and the organization of independent educational and scientific research of students are discussed. The development is based on the original method of physical object-oriented modeling (POOM), which is an application of traditional ideas of object-oriented programming to the problems of constructing and configuring numerical models of relatively complex physical systems. Within its framework, a computer model of a physical system is constructed as a set of software objects that model the behavior of its components relative to separate physical elements: particles and fields. The interaction between the elements of the model is described using self-adapting algorithms, the choice of which is set during the construction of the model, depending on the physical approximation used: classical or relativistic. An electronic designer of interactive models of physical systems, represented in the form of arbitrary aggregates of classical and relativistic particles interacting with each other and external fields, has been created on the basis of the POOM ideology and Java-Script technology. The possibility of using an electronic designer as a basis for students to conduct independent research work on the study of the physical properties of complex mechanical systems, the analysis of which goes beyond the standard programs in physics and mathematics, is tested. The heuristic capabilities of the models created with the help of an electronic designer are demonstrated. The electonic designer is focused on the development of a series of virtual physical models to support classroom and online courses in physics and the organization of independent creative work of students in the MOOC–education system. [ABSTRACT FROM AUTHOR]

The paper analyzes the parametric uncertainty of the considered mathematical model, identifies the main parameters of the model, which undergo changes in the course of the real functioning of the studied pneumatic system. A nonlinear synergistic law for controlling the position of the piston of a pneumatic actuator has been developed, which has robust properties to changing the parameters of the model within the maximum permissible limits. The obtained results of computer modeling confirm the robust properties of the obtained nonlinear synergetic control laws and the achievement of the set technological control goal - moving the rod to a given position under conditions of parametric uncertainty. The robust properties of a closed-loop control system with integral adaptation are considered with an uncontrolled variation of the load mass within: m1 = 0,6 kg and m2 =0,9 kg and variations of the viscous friction coefficient in the following values:) Ƞ1 =101 N · s/m; and Ƞ1 =101 N · s/m. [ABSTRACT FROM AUTHOR]

In the paper the cancellation phenomenon in bridge beams influenced by high traffic speed on high-speed railroads is discussed. The Euler-Bernoully beams model in combination with partial equations for beams and ordinary equations for a train were used. Multiple intermediate resonance which may occur in case of active vibration control makes the cancellation phenomenon not only useless but even harmful because of different speed of trains. Nevertheless, the computer simulation does not detect the multiple resonance at the speed value that is predicted by train signature method. [ABSTRACT FROM AUTHOR]

Soft Computing will be primarily accustomed give solutions to real-world problems, that aren't modelled or too tough to model mathematically. during this planned paper, an in-depth survey of varied procedure techniques like Genetic algorithmic rule and K Nearest Neighbors employed in the care trade Health diseases are included for prediction. The computer model moon-faced problems are known but health and also future analytical directions are given to predict and predict health conditions. [ABSTRACT FROM AUTHOR]

Tall buildings are mostly sensitive to wind load and the effect of wind varies with respect to height, location, shape of the structure, and hence it important to calculate the actual wind loads on tall buildings. This paper investigates the effect of wind over a square building and square building with twist 45°. The stimulation is carried using Computational Fluid Dynamics (CFD) available in ANSYS Fluent software. Turbulence model k-ε is used to simulate the external flow. The building stimulation is done at a 0ͦ winf angle. The result such as wind pressure distribution on various faces of the building is obtained and hence the result proves that aerodynamically modified building shapes can help to reduce the wind load on tall buildings. Further, this paper externs in identification wake regions, flow patterns of the wind and their behaviour around the building. [ABSTRACT FROM AUTHOR]

The paper presents a study of the parameters of the angular stabilization circuit with relay actuators using MATLAB Simulink numerical simulation tools, which implements the principles of visually-oriented programming. This paper demonstrates the convenience of creating a model of a roll stabilization system in the MATLAB Simulink. This model is quite comprehensible and suitable for analysis, which not only simplifies the process of stabilization system synthesis but also allows performing the task with high efficiency. The roll stabilization system layout, presented as a relay system with all its advantages and disadvantages, is considered. During the analysis of such systems in MATLAB Simulink, it is possible to track the limit modes in such systems, determine the conditions for the self-oscillation occurrence, and assess the sliding mode quality. Advanced features of MATLAB Simulink allow not only to create a model and perform simulations but also to conduct large-format research aimed at improving both the structure of the stabilization system itself and the choice of its optimal parameters. [ABSTRACT FROM AUTHOR]