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The challenges in improving oil recovery on carbonate reservoir which still have high remaining reserves are naturally fractured and heterogeneous properties of the rock. Those factors contribute to selecting the applicable EOR method. Polymer injection is one of the best candidates for the EOR method in a sweeping efficiency in carbonate reservoir implementation. This paper's main purpose is to observe the best polymer concentration to produce the highest oil recovery. The sensitivity of some scenarios is approached by using the black oil model simulation method. Several concentrations of the polymer are implemented in the simulator, the responses of oil and gas production are recorded. The simulation is constrained by a minimum of surface water rate is about 1572 bbl/day and a minimum BHP is about 2500 psia. The sensitivity of polymer concentration is conducted by 3 scenarios, those are 700 ppm; 1200 ppm, and 2200 ppm. The results show that injecting 1200 ppm polymer provides the highest incremental oil recovery is about 9%. It means higher polymer concentration is not always equal to higher oil recovery. [ABSTRACT FROM AUTHOR]

In this paper, the sparse variable selection problem is considered for the Gaussian linear models. Varying forms of nonconvex penalties have been investigated for solving sparse variable selection problem with a specific interest in finding a solution under different forms of convex algorithmic structure. Specifically, this study investigates the solution paths of three different algorithms that utilized the coordinate-wise descent optimization technique. The three algorithms considered are the Least Absolute Selection Operator (LASSO), Minimax Concave Penalty (MCP or MC+) and the SparseNet. The predictive performances of the algorithms were studied for comparison using a Monte-Carlo simulation of several linear regression modelling scenarios. [ABSTRACT FROM AUTHOR]

The paper is dedicated to the building and investigation of mathematical models and numerical methods of human resources management. First, we consider cooperative game theoretic models of reward allocation. An algorithm of solution of the problem basing on different optimality principles is proposed. Then dynamic models of administrative and economic control of the working time are studied. It is assumed that each employee divides his working time between the main work and other kinds of labor activity. A supervisor can bound the share of main work from below (that incurs administrative control cost) or propose the coefficients of reward. These managerial methods are formalized as dynamic Stackelberg games with phase constraints that are solved by means of simulation modeling. At last, the discrete optimization models of staffing are considered. A computational analysis of sensitivity of the solutions to the change of model parameters is made, and an interpretation of the results is proposed. [ABSTRACT FROM AUTHOR]

This paper intends to provide an initial background for the selection and calibration of the CFD model suitable for the simulation of firing process of ceramic bricks in tunnel kilns. Therefore, the most suitable model is selected based on previous literature review and its capability is demonstrated using a reduced-scale virtual experiment. Such experiment was designed to simulate conditions in the tunnel kilns and to provide data for further analysis. First, a simple spatial configuration of bluff bodies in the wind tunnel is investigated using laminar and turbulent model to validate and confirm the presumed flow regime. With this validation, the same CFD model is extended by the heat balance equation and the heat exchange dynamics between air and solid bodies for the same configuration is analyzed. [ABSTRACT FROM AUTHOR]

This paper presents an approach for the interaction prediction and convergence analysis and the optimal control problem of the dynamic systems, which eventually improves the numerical accuracy of the results. The convergence behavior of the proposed algorithms for analyzing the study case presented in this paper, can be solved in hierarchical structures by introducing a set of coordination variables. The lower level solves the local optimization problems while keeping the coordination variables fixed, and the upper level uses the optimal trajectories received from the lower level to update the coordination vectors, which afterwards are sent back to the lower level. In accordance with the coordination parameters, there will be two approaches considered in this paper: first, the interaction prediction where the coordination vector is an input and second, the cost prediction approach with the coordination vector. A mathematical study of the convergence behavior of the proposed algorithms is presented. It is shown that the new algorithm is convergent under given sufficient conditions which are strongly related to the interaction between the subsystems and the integration period. [ABSTRACT FROM AUTHOR]

The paper deals with the kinetic (that is, impact-driven penetration) effect of aircraft (aerial vehicles, AV) colliding with thin metal barriers at high velocities. Investigating this impact-driven penetration effect of AV involves studying the processes of perforation (perforation means that the aircraft emerges fully on the other side of the barrier), which requires not only computational simulations, but also actual experiments, due to how complex these processes are. The objective of our investigation is twofold: first, we want to develop an analytical method for computing the parameters of the impact-driven AV penetration effect, said method correctly taking into account the perforation process specifics; then, we want to verify the computation results obtained. The paper uses a quasi-dynamic approach to computing impact-driven penetration effect of poorly deformable AVs that makes it possible to account for strength and inertial resistance of a thin metal barrier. We present and state an analytical computational method making it possible to estimate the impact-driven penetration effect of AVs that may interact with thin metal barriers either as an emergency situation or as part of their regular functionality (h/d < 0.5). We compared analytical computation results to experimental data (that is, validated our model) for various AVs at velocities of 79.3 to 315 m/s. We used our analytical method to compute impact-driven penetration AV effect on spatially separated thin metal barriers (screens). The results obtained may be used for preliminary estimation when developing requirements for AV components during its regular operation or an emergency. More accurate estimates will involve small-scale physical modelling methods and numerical simulations. [ABSTRACT FROM AUTHOR]

The correlation between wind tunnel experimental results and free stream flight results is difficult even for incompressible flows and 2D configurations. This correlation becomes more difficult to be found if the geometrical configuration contains high lift devices such as Kruger and flaps due to the significant amount of separations. Furthermore, the walls of subsonic wind tunnel cause massive wave pressure reflections especially for high blockage, which affect dramatically the aerodynamic coefficients for experimented models . Unfortunately, very few papers and books deal with this delicate subject even if the appearance of subsonic wind tunnel dates over 100 years ago. For this reason, the present paper deals with this complex subject in order to bring some new light in this complex field. This paper is based on an impressive number of RANS simulations for plain airfoils and 2D high lift configurations for wind tunnel and free stream conditions in order to find some useful correlations for INCAS subsonic wind tunnel. [ABSTRACT FROM AUTHOR]

This study presents a simulation based optimization study of a multi-tube trapezoidal cavity receiver of a Linear Fresnel Collector plant in Pretoria, South Africa. A comprehensive optimization study - an optical, thermal and economic optimization study - based on realistic simulations of these objective goals on an annual basis for such a plant is presented in this paper. This paper could be used as an applicable guideline for future researchers who work on the optimization of Concentrated Solar Power Plants. [ABSTRACT FROM AUTHOR]

The paper presents cooperation of two heterogeneous mobile robots which are two-wheeled robot and an unmanned aerial vehicle. Those platforms are fully autonomous and are equipped with indoor positioning system to acquire position of each. This paper introduces simple algorithms of path planning in static environment which is known for rover robots and path handling for both platforms. Accurate environment map is given a priori. The main aim of this work are the simulation tests of the simple cooperation algorithm. Tests were conducted in Simulink and its results are presented in both mobile platforms trajectories and path errors in x and y directions. The presented results show the effectiveness of proposed method. [ABSTRACT FROM AUTHOR]

Sustainable development has become a big issue in almost all research fields. In water resources system management, if the system is able to satisfy the changing water demand without any system shortage, then sustainability is achieved. In fact, water resources system management is operated under complete uncertainty, with no real possibility to look into the future to predict natural condition, policy, or demand. Due to the increasing problem of scarce water resources, this encourages researchers and experts to manage water resources much more effectively, ensuring all important challenges are resolve and to maintain water resources to guarantee to meet the demand under any condition. This paper discusses the evolution of sustainable development and reviews issues regarding concept, definition, and approach to sustainable development for both research and its application to water resources system management, especially pertaining to water demand fulfillment. The paper describes state of the art simulation and optimization techniques in water resources system management, reviews the growth of simulation and optimization techniques in an effort to establish a sustainable system, frames the progress of such techniques applied to water resources system, and identifies the needs for further development to face the future challenges. This study reviews published articles from 2000 to 2017 in more than 50 peer-reviewed journals, regarding the application of simulation and optimization techniques in water resources system management in relation to sustainable water demand fulfillment by system management. The study showed that water management requires both researchers and practitioners to optimize the limited water availability in fulfillment of the increasing demand for water. Simulation and optimization are promising solutions, and as they are powered by the advancement of computer technology, they have become central to the evolution of these techniques in their application to the sustainable development of water resources system. [ABSTRACT FROM AUTHOR]

Upper vents in the tunnels can make the drivers' eyes feel series of alternation of light and shade in short time. This phenomenon does affect transit safety, and even causes traffic accidents. In this paper, we study the single lane traffic flow in the tunnel, which is disturbed by the upper vents. Based on the Kerner-Klenov-Schreckenberg-Wolf (KKSW) three-phase cellular automaton (CA) traffic flow model for single-lane road, we redefine the cars' moving rules considering the interference of air vents. A series of simulations are carried out in order to reveal cars travel process, the influence of traffic flow and so on. And then we study the transit safety condition with the usage of data get after simulations. The simulations results show that the redefining moving rules can be used to study not only the characteristic of traffic flow under the vents in the tunnel, but also some complex traffic problems such as traffic breakdown, synchronized flow pattern, and moving jams of the Kerner's three-phase theory. Furthermore, we can figure out how these vents affect transit safety. Thus the work in the paper is helpful for the management of the traffic flow and the improvement of transit safety in tunnels. [ABSTRACT FROM AUTHOR]

In this paper a optimization procedure for the design of geometrical configuration of acoustic bricks is presented. The optimization process combines both computational simulation approach together with genetic algorithm. However, for the successful solution several necessary tasks must be accomplished. First, the selection and implementation of proper acoustic model is needed and second, the method for generation of geometrical configuration for the solution by Finite Element Method must be found. Therefore, the paper does not only describe the optimization procedure with recent knowledge and achievements, but also proposes several future objectives necessary for successful solution of the optimization problem. [ABSTRACT FROM AUTHOR]

Since the commercial usage of compact combustion engines, eccentric shafts have been used to transform translational into rotational motion. Over the years, several processes to manufacture these eccentric shafts or crankshafts have been developed. Especially for single-cylinder engines manufactured in small quantities, built crankshafts disclose advantages regarding tooling costs and performance. Those manufacturing processes do have one thing in common: They are all executed at elevated temperatures to enable the material to be formed to high forming degree. In this paper, a newly developed cold forging process is presented, which combines lateral extrusion and shifting for manufacturing a crank in one forming operation at room temperature. In comparison to the established upsetting and shifting methods to manufacture such components, the tool cavity or crank web thickness remains constant. Therefore, the developed new process presented in this paper consists of a combination of shifting and extrusion of the billet, which allows pushing material into the forming zone during shifting. In order to reduce the tensile stresses induced by the shifting process, compressive stresses are superimposed. It is expected that the process limits will be expanded regarding the horizontal displacement and form filling. In the following report, the simulation and design of the tooling concept are presented. Experiments were conducted and compared with corresponding simulation results afterwards. [ABSTRACT FROM AUTHOR]

This paper presents novel ideas in numerical design of mixing elements in single-screw extruders. The actual design process is reformulated as a shape optimization problem, given some functional, but possibly inefficient initial design. Thereby automatic optimization can be incorporated and the design process is advanced, beyond the simulation-supported, but still experience-based approach. This paper proposes concepts to extend a method which has been developed and validated for die design to the design of mixing-elements. For simplicity, it focuses on single-phase flows only. The developed method conducts forward-simulations to predict the quasi-steady melt behavior in the relevant part of the extruder. The result of each simulation is used in a black-box optimization procedure based on an efficient low-order parameterization of the geometry. To minimize user interaction, an objective function is formulated that quantifies the products’ quality based on the forward simulation. This paper covers two aspects: (1) It reviews the set-up of the optimization framework as discussed in [1], and (2) it details the necessary extensions for the optimization of mixing elements in single-screw extruders. It concludes with a presentation of first advances in the unsteady flow simulation of a metering and mixing section with the SSMUM [2] using the Carreau material model. [ABSTRACT FROM AUTHOR]

Aiming at the problems of different testing information modes and the coexistence of quantitative and qualitative information in the state evaluation of electromechanical equipment, the paper proposes the use of data fusion technology to evaluate the state of electromechanical equipment. This paper introduces the state evaluation process of mechanical and electrical equipment in detail, uses the D-S evidence theory to fuse the decision-making layers of mechanical and electrical equipment state evaluation and carries out simulation tests. The simulation results show that it is feasible and effective to apply the data fusion technology to the state evaluation of the mechatronic equipment. After the multiple decision-making information provided by different evaluation methods are fused repeatedly and the useful information is extracted repeatedly, the fuzziness of judgment can be reduced and the state evaluation Credibility. [ABSTRACT FROM AUTHOR]

Paper is focused on problem of robust feature detector performance in case when intensity distribution is uneven over image. Results of feature detector simulation in case of various intensity changes, equations for estimation rate of false alarms and probability of correct detection are presented in paper. [ABSTRACT FROM AUTHOR]

This paper demonstrates a Junction-less Double Gate n-p-n Impact ionization MOS transistor (JLDG n-IMOS) on a very light doped p-type silicon body. Device structure proposed in the paper is based on charge plasma concept. There is no metallurgical junctions in the proposed device and does not need any impurity doping to create the drain and source regions. Due to doping-less nature, the fabrication process is simple for JLDG n-IMOS. The double gate engineering in proposed device leads to reduction in avalanche breakdown via impact ionization, generating large number of carriers in drain-body junction, resulting high ION current, small IOFF current and great improvement in ION/IOFF ratio. The simulation and examination of the proposed device have been performed on ATLAS device simulatorsoftware. [ABSTRACT FROM AUTHOR]

Climbing robot has been an area of interest since the demand of inspection of pipeline, nuclear power plant, and various big structure is growing up rapidly. This paper represents the development of a bio-inspired modular robot which mimics inchworm locomotion during climbing. In the present paper, the climbing motion is achieved only on a flat vertical plane by magnetic adhesion principle. The robot is modelled as a 4-link planar mechanism with three revolute joints actuated by DC servo motors. Sinusoidal gait pattern is used to approximate the motion of an inchworm. The dynamics of the robot is presented by using ADAMS/MATLAB co-simulation methodology. The simulation result gives the maximum value of joint torque during one complete cycle of motion. This torque value is used for the selection of servo motor specifications required to build the prototype. [ABSTRACT FROM AUTHOR]

Nowadays rubbish separating or recycling is a main problem of nation, where peoples dumped their rubbish into dumpsite without caring the value of the rubbish if it can be recycled and reused. Thus the author proposed an automated segregating device, purposely to teach people to separate their rubbish and value the rubbish that can be reused. The automated size-based mechanical segregating device provides significant improvements in terms of efficiency and consistency in this segregating process. This device is designed to make recycling easier, user friendly, in the hope that more people will take responsibility if it is less of an expense of time and effort. This paper discussed about redesign a blade for the sorting device which is to develop an efficient automated mechanical sorting device for the similar material but in different size. The machine is able to identify the size of waste and it depends to the coil inside the container to separate it out. The detail design and methodology is described in detail in this paper. [ABSTRACT FROM AUTHOR]

The paper proposes a method for determining of an aircraft wing thermal state during flight in icing conditions. The method is based on a probabilistic representation of a boundary value problem for a parabolic type equation and numerical solution of stochastic differential equations. It is assumed that the heat exchange process in a problem of the type under consideration is described quite well by the boundary value problem for the two-dimensional heat equation. The approximate solution definition at a given point is reduced to the numerical simulation of the diffusion random process paths. [ABSTRACT FROM AUTHOR]

The bidomain and monodomain models are types of nonlinear reaction-diffusion system and are widely used to study cardiac electrical activity. The numerical simulation of these models calls for extremely fine meshes to accurately predict the depolarization and repolarization wave fronts, which leads to huge computational challenges. In this paper, we will show the advantage of a parallel mesh adaptation method for solving the monodomain model. A comparison between parallel adapted and uniform meshes will be presented. The computational efficiency of the proposed methodology is assessed using an example of spiral wave. [ABSTRACT FROM AUTHOR]

The paper represents practical method for calculation and simulation of loop control part of peak current mode buck converter. It's useful for initial design in very early stage of product development. The presented research is useful from the point of view of the synthesis of control of power electronic converters, where it is of special importance to guarantee the output parameters, with a number of destabilizing factors such as: input, output, environment, tolerances of circuit elements. A significant advantage of the proposed approach is that its implementation does not require in-depth knowledge of both the theory of automatic control and mathematics. In this aspect, the synthesis of a controller emphasizes the use of specialized mathematical software. [ABSTRACT FROM AUTHOR]

There are published articles dealt with the integration of acceptance sampling and supply chain management using simulation models. This paper focus on developing simulation model for 100 % screening in supply chain management and considers supply chain model with the re-ordering system. Whatever be the good items produced, practically there are the possibilities of imperfect items or they might not satisfy the standards of production process. Therefore, it needs rectification. Hence, the researcher applies sampling plans in-between the stage of purchase and production process. Generally, after purchase, the entire lot is being sent to the production process, whereas, in this proposed model, the purchased lot is being sent to sampling inspection. In this stage, if the sampling inspection results are positive and the lot is accepted then only the lot is send it to production process. If the lot is rejected then it is allowed to the acceptance sampling process only after 100% screening. Under 100% Screening Policy the simulation model considers the cost effectiveness in supply chain also using the simulation software Goldsim 12.0. [ABSTRACT FROM AUTHOR]

In this paper we propose distinct approach for numerical simulation of the mechanical system's dynamics in the entropy formalism, as opposed to the canonical energy formalism. It was shown that this approach allows one to reproduce any pre-specified equilibrium distribution, and the monotonicity of the entropy increase indicates the general physical correctness from the thermodynamic point of view. [ABSTRACT FROM AUTHOR]

The Born series method is a classical approach to describe the properties of various physical systems. Despite the tremendous advantage of this approach which leads to save the time of complicated systems simulation, it has an assumption in the origin about a small value that can be treated as a decomposition parameter. This fact brings strong limitations on the use of this approach for studying optical systems, especially resonant ones. In this paper, it is observed how the Born series method can be used for the special case of metalens designing. [ABSTRACT FROM AUTHOR]

The paper describes validation of a multidimensional semi-Lagrangian method with the use of a conservative fifth-order WENO scheme on the basis of computer simulation of models of rotating circular solid disks. Implementation of this method on GPU is briefly described. [ABSTRACT FROM AUTHOR]

The excitations caused by the road roughness is the main parameter for the vertical vibrations generated in a vehicle. Their influence in the ride comfort of passengers and vehicle stability is high. It is essential to quantify road excitations so that they could be utilized for vehicle dynamic analysis. In this research paper, an in depth literature survey was carried over regarding the road profile measurement techniques and road roughness representation methods. It was found that the Power Spectral Density(PSD) representation of the road profile has been widely employed by researchers. Based on the ISO standard 8608:2016, the roads were classified and the road profile equation available in the literature survey was studied. A simulink model was created for the road profile equation. The road profiles for different road types and varying vehicle velocities were generated using the simulink model. The road profiles thus created can be utilized for vehicle dynamicanalysis. [ABSTRACT FROM AUTHOR]

This paper presents the application of simulation in modeling the food manufacturing system at XYZ factory. The problems faced by the factory are the bottlenecks that happen in their food manufacturing system which consist of four processes i.e. rolling and fermentation process, drying process, sorting and grading process and packaging process. From the data collection provided by the management of the company showed that the drying process and packaging process has high waiting processing times and lead to the entities from the previous process waiting for a long time. Moreover, the imbalance workers for each process can affect the productivity and output of the production. Simulation method was used for modeling the system. The results of the simulation model are analyzed for the suggestion of improvement. The scoring model was used in this study to select the best improvement model from nine improvement models that have been developed. For the scoring model, the company has selected five criteria. The criteria are total production, average worker utilization, and average total production time, the average number of entities in the system and total number of workers involved in the manufacturing system. Each of the criteria has been weighted by the company in terms of its relative importance. In this study, IP4 is the best improvement model where the model achieves the highest score in the scoring model and can maximize the total production and average resource utilization. IP4 has recommended the reallocation of workers. The application of the simulation method and the results from this research can help the management of the factory to make better decisions thus enhance the food manufacturing system. [ABSTRACT FROM AUTHOR]

The main aim of the paper is study on flexural vibration reduction of a laminated cantilever beam by Macro Fiber Composite active element embedded to its surface. The numerical simulations of the system using the Finite Element Method (FEM) are performed. The Abaqus software package is applied. The time-domain analysis using the implicit method is carried out. The excitation of the system by concentrated load as a periodic force is defined. The beam response recorded by the sensor is used in the proportional control (P). In this application the MFC element is activated with a voltage signal, which is directly proportional to the measured displacement. A subroutine UAMP is prepared for implementation of the control algorithm. The resonance curves for the beam with and without control system are determined. Next, the experimental studies are performed and both results are compared. It was found that the proportional control algorithm of the MFC element can be used to change the stiffness of the thin-walled beam. [ABSTRACT FROM AUTHOR]

Power transformation and control has been developing continuously in topology, control technology and application fields, especially in the development of smart grid. Through the analysis of phase-controlled rectifier circuit, it is helpful to further study smart grid and new energy. In this paper, the PSIM software simulation conditions for modeling, in-depth comparison and analysis of single-phase bridge full control rectifier circuit and three-phase bridge full control rectifier circuit operating principle and each parameter waveform, through the experiment to get the three-phase bridge rectifier circuit phase shift characteristics, fault waveform and cause analysis. Finally, it is concluded that phase-controlled rectifier will inevitably bring some harmonics, and a method to reduce the harmonics as much as possible is proposed through principle analysis. [ABSTRACT FROM AUTHOR]

The quadrotor type of UAV (QUAV), is arguably the most popular type for civilian purposes, since it does not mandate a complicated remote controlling skill to operate it. This popularity, however, has yet to be balanced with research in mathematical modelling, design, and analysis. This paper describes a mathematical modelling process of a QUAV, by exploiting the usage of MATLAB/Simulink software. The main aim is to provide a proper mathematical model to design and evaluate the control system to maintain QUAV stability. Along with the model, three basic automatic control systems were also designed, i.e., the forward-speed hold, sideward-speed hold, and altitude hold system. Several simulations were conducted afterward, to test both the model and the designed control system, which showed satisfying results in representing a QUAV system. QUAV dynamic characteristics can be observed from the simulation, including the logical commands to alter the rotors thrust, the rotor limitation in handling many commands at once, the vehicle dependency of automatic control systems, and the fact that a motion in one degree of freedom can easily affected others. The developed model evidently has a good potential as a base for QUAV analyses and control design. [ABSTRACT FROM AUTHOR]

Retailers play a vital role in supply chains, particularly as an intermediary that brings together supply and demand. One of retailer's strategic decisions that affects business profitability and supply chain as a whole is price promotion strategy. As retailers interact directly with the end costumers, a good promotion strategy has to incorporate the consumer behavior and preferences. Also, in optimizing its income, a retailer also needs to pay attention to their competitors who offer the same products or substitute goods to consumers. With regard to these conditions, it could be said that determining the best promotion strategy is a complex issue. The problem is difficult to understand through traditional mathematical approaches because of the interactions between retailers and consumers. This paper proposes an agent-based simulation model that can help analyzing the effectiveness of price promotion strategies. The model consists of two types of agents, which are retailers and consumers. It considers a dynamic consumer behavior driven by consumer preferences. Competition among retailers is also taken into account to the model. The final result of this study is an agent-based simulation model and analysis of price promotion strategies that are in line with the dynamic retail business environment. [ABSTRACT FROM AUTHOR]

In 2017, the Research Center for Metrology developed a low-frequency vibration calibrator. This calibration system is composed of mechanical and control components. The mechanical component consists of a DC motor and vibration table, and the control component consists of a microprocessor. The type of control used is open-loop control. In this paper, an evaluation of the calibration system is presented. The method used to evaluate is to use system simulation and testing. The tested frequency is 0.5-10 Hz. Based on the results of simulation and testing, it is known that there are differences in the output frequency between control components and mechanics. [ABSTRACT FROM AUTHOR]

The radio communication and navigation play an important role in flight and airplane. The challenge is to locate a plane at any moment since taking off till landing. A simulation system for tracking aircraft traffic must be implemented over all its flight by determination a longitude and latitude on the earth. In this paper, a simulation system for completed flight has been done using Matlab (m_file and aerospace blockset simulink). This model animates aircraft direction and motion on 3D earth (by NED frame which attached with the model) while tracing the trajectory by an ordered list of cities with latitudes and longitudes as input. This model developed to guess the location of the aircraft at any moment during its journey within the airspace of earth. The simulation model shows how you can visualize airline routes on the globe which is helpful and active for aircraft navigation through the flight. [ABSTRACT FROM AUTHOR]

The paper deals with the most frequent simulations with the calculation models of road means of public transport based on multibody approaches. At first the term of multibody dynamics is introduced in brief. Then most frequent simulations with road means of public transport are specified. They are driving manoeuvres (i.e. a severe double lane-change manoeuvre according to ISO 3888-1, “moose” test, steady-state skidpad driving, steady-state turning, steering returnability, braking in a curve, sudden steering-angle change according to ISO, sudden steering-angle change according to ESV, sinusoidal steering-wheel input, random steering-wheel input and traffic lane change; results provide information on the vehicle driving properties), driving operations (i.e. braking, acceleration; results inform about the vehicle driving properties), running over an artificial obstacle (outputs of time histories of dynamic forces in the axle suspension elements are input data for the calculation of the bodywork and bogie parts strain using software based on the FEM method, time dependencies of relative deflections of air springs and rates of rebound and compression of shock absorbers inform about the suitability of the used axle suspension elements), driving along an uneven road surface (results can be used for the evaluation of fatigue life of dynamically loaded vehicle parts and are often used for the evaluation of driving comfort of a driver and passengers), a slow front impact against a concrete wall (results are input data for the evaluation of the vehicle structure deformation using the FEM programs) and the influence of lateral wind (results provide information about the vehicle driving stability). The TriHyBus (abbreviation of the Triple Hybrid Hydrogen Bus) serves as an example for introducing a severe double lane-change manoeuvre according to ISO 3888-1. [ABSTRACT FROM AUTHOR]

Biomass gasification is a promising solution for power generation and combined heat and power (CHP). The conversion to syngas allows for a more efficient use of biomasses with low pollutant emissions in internal combustion engines. Small-scale plants do not have the expected diffusion, mainly due to a lack of experimental experience. To overcome this drawback, accurate simulation models may be useful for the diagnostics and control of these systems. A commercial-grade system, fueled by syngas from lignocellulosic woodchips, has been installed in the Science and Technologies Campus of the University of Parma, within the SYNBIOSE project. The scope is to acquire knowledge to improve small-scale gasification and CHP plants for the tertiary sector. The project includes the development of a simulation model for system diagnostics. The syngas cleaning line is a critical part of CHP plants. It must remove any solid/liquid fraction from the raw syngas, as produced by the gasifier, yielding the clean gas. To this extent, a MATLAB®/Simulink® model has been developed and is described in the paper. It is able to predict the operation according to the inputs and operating parameters, e.g. considering fluid inlet characteristics and fouling. Model analysis showed that the calculation results are consistent with the physical behavior of the plant, providing a first validation of the proposed model. The model can be useful for system simulation and diagnostics. [ABSTRACT FROM AUTHOR]

In order to cope with the impact of new energy distributed generation system on the stable operation of grid-connected inverters and improve their ability to cope with grid changes, this paper proposes a three-phase circuit-based LCL grid-connected inverter control strategy and builds a simulation model. The stability verification. The results show that the proposed control strategy can achieve flexible adjustment of the power injected into the grid, and can ensure high power factor grid connection. The LCL filter works well to ensure the waveform quality of the injected grid current. Through the above control strategy, the high power factor control and the flexible adjustment of the injected grid power are realized. [ABSTRACT FROM AUTHOR]

This paper presents the designing, modeling and simulation of the single all silicon ring resonators with silicon waveguides. A comparative study has been conducted on the basis of coupling length of the ring resonator. Ring resonators are extensively used in the photonics, telecommunications and sensing applications. It has been observed that increase in coupling length results in sharper negative reflectance in spectrum. [ABSTRACT FROM AUTHOR]

This paper investigates the utilization of the complex chaotic dynamics given by the several selected time-continuous as well as discrete chaotic systems, as the chaotic pseudo random number generators and driving maps for the chaotic optimization. Chaos based optimization concept is utilizing direct output iterations of chaotic systems transferred into the required numerical range or it uses the chaotic dynamics for mapping the search space mostly within the local search techniques. This paper shows two groups of complex chaotic dynamics given by either discrete systems or time continuous chaotic flows and oscillators. Simulations of examples of chaotic dynamics, implementation issues and possibilities are briefly discussed in this paper. [ABSTRACT FROM AUTHOR]

Optimizing solar field operation and control is a key factor to improve the competitiveness of line-focus solar thermal power plants. However, the risks of assessing new and innovative control strategies on operational power plants hinder such optimizations and result in applying more conservative control schemes. In this paper, we describe some applications for a whole solar field transient in-house simulation tool developed at the German Aerospace Centre (DLR), the Virtual Solar Field (VSF). The tool offers a virtual platform to simulate real solar fields while coupling the thermal and hydraulic conditions of the field with high computational efficiency. Using the tool, developers and operator can probe their control strategies and assess the potential benefits while avoiding the high risks and costs. In this paper, we study the benefits gained from controlling the loop valves and of using direct normal irradiance maps and forecasts for the field control. Loop valve control is interesting for many solar field operators since it provides a high degree of flexibility to the control of the solar field through regulating the flow rate in each loop. This improves the reaction to transient condition, such as passing clouds and field start-up in the morning. Nevertheless, due to the large number of loops and the sensitivity of the field control to the valve settings, this process needs to be automated and the effect of changing the setting of each valve on the whole field control needs to be taken into account. We used VSF to implement simple control algorithms to control the loop valves and to study the benefits that could be gained from using active loop valve control during transient conditions. Secondly, we study how using short-term highly spatially-resolved DNI forecasts provided by cloud cameras could improve the plant energy yield. Both cases show an improvement in the plant efficiency and outlet temperature stability. This paves the road for further investigations of new control strategies or for optimizations of the currently implemented ones. [ABSTRACT FROM AUTHOR]

Drug abuse in the world quite astonish and tend to increase. The increase and decrease on the number of drug abusers showed a pattern of spread that had the same characteristics with patterns of spread of infectious disease. The susceptible infected removed (SIR) and susceptible exposed infected removed (SEIR) epidemic models for infectious disease was developed to study social epidemic. In this paper, SEIR model for disease epidemic was developed to study drug abuse epidemic with rehabilitation treatment. The aims of this paper were to analogize susceptible exposed infected isolated recovered (SEIIrR) model on the drug abusers, to determine solutions of the model, to determine equilibrium point, and to do simulation on β. The solutions of SEIIrR model was determined by using fourth order of Runge-Kutta algorithm, equilibrium point obtained was free-drug equilibrium point. Solutions of SEIIrR showed that the model was able to suppress the spread of drug abuse. The increasing value of contact rate was not affect the number of infected individuals due to rehabilitation treatment. [ABSTRACT FROM AUTHOR]

Rollovers are complex road accidents causing a big deal of fatalities. FE model for rollover study will costtoo much time due to its long duration. A new multi-body modeling method is proposed in this paper which can save a lot of time and has high-fidelity meanwhile. Following works were carried out to validate this new method. First, a small van was tested following the FMVSS 208 protocol for the validation of the proposed modeling method. Second, a MADYMO model of this small van was reconstructed. The vehicle body was divided into two main parts, the deformable upper body and the rigid lower body, modeled by different waysbased on an FE model. The specific method of modeling is offered in this paper. Finally, the trajectories of the vehicle from test and simulation were compared and the match was very good. Acceleration of left B pillar was taken into consideration, which turned out fitting the test result well in the time of event. The final deformation status of the vehicle in test and simulation showed similar trend. This validated model provides a reliable way for further research in occupant injuries during rollovers. [ABSTRACT FROM AUTHOR]

Air filtration system plays an important role in getting good quality air into turbo machinery such as gas turbine. The filtration system and filters improve the quality of air and protect the gas turbine parts from contaminants which could bring damage. This paper is focused on the configuration of the self-cleaning canister filter in order to obtain the minimal pressure drop along the filter. The configuration includes a modified canister filter cap that is based on the basic geometry that conforms to industry standard. This paper describes the use of CFD to simulate and analyze the flow through the filter. This tool is also used to monitor variables such as pressure and velocity along the filter and to visualize them in the form of contours, vectors and streamlines. In this study, the main parameter varied is the inlet velocity set in the boundary condition during simulations, which are 0.032, 0.063, 0.094 and 0.126 m/s respectively. The data obtained from simulations are then validated with reference data sourced from the industry, and comparisons have subsequently been made for these two filters. As a result, the improvement of the pressure drop for the modified filter is found to be 11.47% to 14.82% compared to the basic filter at the inlet velocity from 0.032 to 0.126 m/s. the total pressure drop produced is 292.3 Pa by the basic filter and 251.11 Pa for modified filter. The pressure drop reduction is 41.19 Pa, which is 14.1% from the basic filter. [ABSTRACT FROM AUTHOR]

Control chart used to monitor shifts in the process mean and variability for multivariate data. This paper aims to monitor process variability through ∣S∣ chart. Process variability observed by used the determinant of the sample covariance matrix, which is called ∣S∣. The result of this paper show that the improved ∣S∣chart is more sensitive to shifts in the process variability. The standard ∣S∣ chart has a bigger ARL than the improved chart by simulation. [ABSTRACT FROM AUTHOR]

The paper deals with the description of GNSS-INS simulator used for testing algorithms of the airborne gravimetry. At first, some specifications of the simulator are presented. Then the basic principles, models, algorithms used in the GNSS-INS simulator are described. The next part of the article concerns the usage of the simulator for testing algorithms of the airborne vector gravimetry. Some simulation results conclude the paper. [ABSTRACT FROM AUTHOR]

This paper proposes an active queue management mechanism, considering the node's own ability and its importance in the network to set the queue threshold. As the network load increases, local congestion of mobile ad hoc network may lead to network performance degradation, hot node's energy consumption increase even failure. If small energy nodes congested because of forwarding data packets, then when it is used as the source node will cause a lot of packet loss. This paper proposes an active queue management mechanism, considering the node's own ability and its importance in the network to set the queue threshold. Controlling nodes buffer queue in different levels of congestion area probability by adjusting the upper limits and lower limits, thus nodes can adjust responsibility of forwarding data packets according to their own situation. The proposed algorithm will slow down the send rate hop by hop along the data package transmission direction from congestion node to source node so that to prevent further congestion from the source node. The simulation results show that, the algorithm can better play the data forwarding ability of strong nodes, protect the weak nodes, can effectively alleviate the network congestion situation. [ABSTRACT FROM AUTHOR]

Understanding how complex phenotypes arise from individual molecules and their interactions is a major challenge in biology and, to meet this challenge, computational approaches are increasingly employed. As an example, a recent paper [1] proposed a whole-cell model Mycoplasma genitalium including all cell components and their interactions. 28 modules representing several cell functions were modeled independently, and then integrated into a single computational model. One assumption considered in the whole-cell model of M.Genitalium is that all 28 modules can be modeled independently given the 1 second step size used in simulations. This is a major assumption, since it simplifies the modeling of several cell functions and makes the modeling of the system as a whole feasible. In this paper we investigate the dependency of experimental results on that assumption. We have simulated the M.Genitalium cell cycle using several simulation time step sizes and compared the results to the ones obtained with the system using 1 second simulation time step. [ABSTRACT FROM AUTHOR]

It is well known that, due to a very aggressive environment and to a rather high rarefaction level of the arc wind tunnel jet, the measurement of fluid-dynamic parameters is difficult. For this reason, the aerodynamic characterization of the jet relies also on computer codes, simulating the operation of the tunnel. The present authors already used successfully such a kind of computing procedure for the tests in the arc wind tunnel (SPES) in Naples (Italy). In the present work an improved procedure is proposed. Like the former procedure also the present procedure relies on two codes working in tandem: 1) onedimensional code simulating the inviscid and thermally not-conducting flow field in the torch, in the mix-chamber and in the nozzle up to the position, along the nozzle axis, of the continuum breakdown, 2) Direct Simulation Monte Carlo (DSMC) code simulating the flow field in the remaining part of the nozzle. In the present procedure, the DSMC simulation includes the simulation both in the nozzle and in the test chamber. An interesting problem, considered in this paper by means of the present procedure, has been the simulation of the flow field around a Pitot tube and of the related measurement of the stagnation pressure. The measured stagnation pressure, under rarefied conditions, may be even four times the theoretical value. Therefore a substantial correction has to be applied to the measured pressure. In the present paper a correction factor for the stagnation pressure measured in SPES is proposed. The analysis relies on twelve tests made in SPES. [ABSTRACT FROM AUTHOR]

Lean manufacturing was broadly implemented to reduce waste. This paper aims to design a simulation modelling to measure waste and cost reduction in lean manufacturing. This paper used integration of dynamic and agent based modelling to design a simulation model of waste measurement. The conceptual model was applied with data from a case study taken small and medium sized of Batik in Madura. A simulation model was then built to translate the conceptual model into a practical application. The simulation model was used to predict levels of total waste cost in different scenarios. The model was verified and validated through the construction simulation model with input from historical data from case study. This model aided decision makers in predicting level of waste cost by changing the value of variables in the interface on monitor. [ABSTRACT FROM AUTHOR]

Copula modelling is becoming more popular in modelling dependence multivariate distributions and various copulas have been suggested throughout the literature. In a previous study, we had proposed a new bivariate copula based on Ruschendorf method and had studied some properties of that copula. Therefore, in this paper, we propose an estimator for the new bivariate copula based on Kendall's τ. The bias and the asymptotic variance of the estimator are also given in this paper where a simulation study was conducted to verify these results. Hence, we find the proposed estimator based on Kendall's τ to be a suitable estimator for the new bivariate copula and this study adds on to contribute to the literature of the bivariate copula. [ABSTRACT FROM AUTHOR]