Proceedings of the 2015 International Conference on Modeling, Simulation and Applied Mathematics

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92 articles

Non-signalized T-shaped Intersections Mixed Traffic Flow Study

Wenfang Feng, Yize Li, Changsheng Zhu
Combining actual city T-shaped intersection traffic conditions in this paper, we propose a cellular automaton model of mixed traffic flow at T-shaped intersection. In order to avoid a collision between vehicles and gridlock phenomenon occurs, running vehicle in the model adopted the principle of major...

Time-varying Stiffness Characteristics of Shaft with Slant Crack

Hengheng Xia, Zhinong Li, Yaoxian Xiao
The stiffness matrix of a shaft with slant transverse crack under the common action of axial force, moment and torque was derived based on material mechanics, local flexibility and fracture mechanics theory and apply strain energy release rate method. The opening and closing regularity of the crack and...

Dynamic Model and Simulation of a MW-class Variable Speed Constant Frequency Doubly-Fed Wind Turbine Generator System

Shaobo Li, Wanxia Wang, Jie Hu, Guanci Yang
By using Matlab/Simulink as a development and simulation platform, a wind turbine simulation-testing system was designed with the data from GH Bladed software and IEC61400-1 standard. Moreover, a whole dynamic model of a MW-class variable speed constant frequency Doubly-Fed wind generator is presented,...

Fatigue Life Prediction of an Impeller Based on Fracture Mechanics

Lei Wang, Tianzhong Sui
Welding structure is widely used in impellers fitted on the large centrifugal compressor and the crack propagation life prediction is studied based on the fracture mechanics. First the finite element structure strength analysis is carried on the three-dimensional entity model of the impeller, and the...

The Influence of Coupling Misalignment on Dynamic Characteristics of Helical Gear System

Jian Xu, Feiyun Cong, Shuiguang Tong, Yi Zhou
The shaft misalignment usually causes the severe vibration of rotating machine. In this paper, a three-dimensional dynamic model of a coupled gear–rotor system is developed to simulate this phenomenon. The numerical simulation of the dynamic characteristics is performed to analyze the effects of both...

The Mathematical Modeling and software Simulation for Ship Oil Purifier System

Ning Zhang, Zhipeng Shen, Changsheng Dai, Haiwei Wang
There are lots of limitations in ship oil purifier practical training system. Most of the simulation system is given priority to hardware simulation and it isn’t convenient to use. For this purpose, it’s necessary to design a software simulation platform to help students to master the application of...

Numerical Simulation 3D of Local Scour around Subsea Caisson Structures in Steady Currents and Waves

Xuyen Hoang
This paper studied the local scour processes at subsea structures using using the computational fluid dynamics codes (OPENSOURCE CODE). The model solved the fully three-dimensional, Reynolds-averaged Navier–Stokes equation closed with the LES model. Stokes and Cnoidal Waves were generated using Fenton’s...

Effects of Current Pacing and Electrical Field on The Turbulence Induced by Voltage Oscillations in Hearts

Hong Zhang, Ruijuan Li, Dan Zhao, Yuan Liu
To the turbulence induced by local voltage oscillations during repolarizing phase of the cardiac action potential, the effects of current pacing and electrical field were investigated to reveal their feasibilities in elimination of the turbulence. A local pathological 2-dimensional tissue including 401...

Unified Control of Single-stage Z-source Grid-connected Photovoltaic System with Harmonics and Reactive Power Compensation

Jingwei Zhang, Honghua Wang, Chengliang Wang, Zhebei Wang, Wei Han, Rong Sun
Based on conventional single-stage grid-connected photovoltaic (PV) Z-source inverter, the unified control combining with harmonic and reactive power compensation is proposed. The grid harmonics and reactive current are measured while PV system outputting power. Then corresponding reactive power compensation...

An Analysis of Factors Influencing the Development of Chinese Coalbed Methane Industry

Chuanping Zhang, Qian Zhao
On the basis of the Delphi method, the indicators / variables that impacted system, were inquired and analyzed by using principal component analyses and factor analysis techniques; the factor equations were exploring utilized: comprehensive latent factors was acquired by solving overdetermined equations,...

Mobility Force Model for Microscopic Simulation of Motorcycle Traffic Behavior

Tienpen Hsu, Yuchen Chen
This paper presents the conceptual structure of a novel microscopic traffic flow behavior simulation model for motorcycle traffic based on a mobility force structure, called mobility force car-following model. The mobility force is defined as the interactive force of motorcycle by surrounding vehicles...

The Integrated Autonomous Underwater Navigation System based on Open Platform for Robotic Services

Youngho Choi, Jungwoo Lee, Jinho Suh, Jongdeuk Lee
This paper introduces how to easily integrate the modular navigation system for the autonomous underwater vehicle (AUV), which consists of the various hardware and software modules. This paper is focused on how to build the integrated underwater navigation module which is applicable to various types...

A Multi-scale Parallel Numerical Solver for Modeling of Two-phase Viscoelastic Fluids Based on the OpenFOAM

Xiaowei Guo, Yu Cao, Miao Wang, Qian Wang
With the rapid development of high performance computing technology, the simulation of viscoelastic fluids has become an extremely important research area and numerous new promising techniques have been proposed over the last decades. In this paper we proposed a numerical algorithm for solving the multi-scale...

The Software Architecture of the Physolator–a Physical Simulation Framework

Dirk Eisenbiegler
Physolator is Java based physics simulation framework. Physolator supports an object oriented style for building physical models. This article describes Physolators core architecture and it explains how the framework architecture contributes to building physical simulations in a modular, object oriented...

Application of Multiple-Scale Analysis In Eco-hydrodynamic Simulation-Combination and comparison between different mathematic models

Xiwen Zhang, Runpeng Zhang, Yu Qiao, Junhui Gao
In the simulation of ecological formation process, as the complexity of the environment increases, only one model is usually not enough to correctly predict the change. In this program, we introduced another way--- the multi-scale analysis to simulate the formation process by combining two models together....

Vehicle Routing Problem with Simultaneous Delivery and Pickup for Cold-chain Logistics

Yingfeng Ji, Hualong Yang, Yong Zhou
In View of the vehicle routing problem with simultaneous delivery and pickup (VRPSDP) for cold-chain logistics, this paper analyzed the cost structure of vehicle fixed cost, running cost, refrigerating cost and cold-chain goods deteriorating cost in the process of delivery and pickup. By minimizing the...

Multiscale Simulation for Highly Oscillatory Parabolic Model

Meiling Sun, Geliang Chen
A multiscale finite element simulation is presented to solve a parabolic problem efficiently. This parabolic model has highly oscillatory coefficient, which make the conventional methods expensive costs or bad behaviors. The new multiscale finite element scheme, whose multiscale basis functions may reflect...

Modelling of Stagnation-Point Flow and Diffusion of Chemically Reactive Species Past A Permeable Quadratically Stretching/Shrinking Sheet

Roslinda Nazar, Norihan Md Arifin, Ezad Hafidz Hafidzuddin, Ioan Pop
A numerical study has been conducted to investigate the modelling of steady two-dimensional stagnation-point flow and diffusion of chemically reactive species of a viscous and incompressible fluid past a permeable quadratically stretching/ shrinking sheet. Similarity transformation has been used to reduce...

Analysis of Parallel Photovoltaic Inverters with Improved Droop Control Method

Ruixing Lin, Mao Yang, Hongping Li
In this paper, an improved droop control strategy is presented to restrict the maximum power of inverters and to enhance the accuracy of reactive power sharing for parallel inverters in low voltage microgrid. The improved method can decouple active and reactive power through rotating orthogonal transformation,...

Quantitative Relationship between Readiness and Availability of Weapon System and Its Application

Jianwei Lv, Zongren Xie, Yifan Xu
The definition and calculation of the operational readiness and availability of weapon system have been described. The relationship and difference between them have been analyzed. On the assumption that the repair time, logistic delay time and the relaxation time are subject to different distributions,...

Modeling and Simulation on Complex System Life Cycle Risk Dynamic Evolution

Yifan Xu, Jianwei Lv, Peng Di, Zongren Xie
Complex system life cycle management is system engineering involving high technology, high investment and high risk. This paper studied risk evolution and risk level distributions on different stages during complex system life cycle. Taking into account risk propagation and feedback influence, the risk...

Rotary Liner Hanger Bearing Roller Modeling and Modification Based on Solidworks Secondary Development

Weiqing Li, Zhijun Niu, Jin Xu
The main failure form of the rotary liner hanger bearing is roller end breakage in the drilling engineering. Some modification methods are applied to solve this problem, however, the modification formula is very complex and calculation process need to be repeated, which may lead to calculating negligence,...

Vision Calibration of Mobile Robot

Mingqin Liu, Xiaoguang Zhang, Guiyun Xu
In consideration of robot’s bumpy moving condition, a camera height dynamic compensation algorithm which based on characteristics of parallel lines was raised up, this camera height dynamic compensation algorithm is based on inherent characteristics that two parallel lines parallel to each other to conduct...

An Approximate Semantic Model of Hybrid Systems

Shihan Yang, Houwen Liu, Qiong Yu, Jinzhao Wu
Hybrid system is a dynamic system. However, it is difficult to formally analyze hybrid systems due to the continuous parts. In this paper, we propose an approximate semantic model of hybrid systems, in order to employ formal analyzing techniques; furthermore, the error could be under control. This method...

Research on the Application of the Concept of Extreme Mode

Wei Liu, Chenyu Liu, Jianyuan Gao, Xiaohong Chen
A new concept is often the result of practice requires. On the basis of the concept of modal, this paper puts forward the concept of Extreme Mode. The Extreme Mode not only contains the total number of units in the most sign values, also contains various units of the number of times many sign values,...

Method for Automatic Construction of Queuing System Models

Eimutis Valakevicius, Tomas Lazauskas
In the paper is suggested a method for automatic creation of queuing system models. For description of a stochastic system we use the schematic structure of the system based on schematic structure of designed components. The performance of a system is described by Markov chains. A phase-type approximation...

Analysis of Key Component in Progressive Collapse Process of Offshore Jacket Platforms

Hong Lin, Lei Yang
Progressive collapse, which is disproportional to the extent of initial damage, often brings a serious damage, even final failure to the structure, so it has attracted widespread attentions over the engineering field. In the design of offshore jacket structures for resisting progressive collapse, it...

A Hybrid Model for Wind Speed Prediction based on Spatial Correlation

Dong Wang, Jianping Fei, Haidong Qian, Yuhong Zhao
The accurate prediction of wind speed is greatly significant for evaluating the security and economy of the wind farm which is connected to the grid. This paper proposed a hybrid model for wind speed prediction based on spatial correlation and nonlinear state space model. Firstly, a rank correlation...

Oscillating Agent Model in Terms of Adapted Orch OR Theory

Darius Plikynas
In this multidisciplinary paper, there are some explanatory sources provided that pertain to the oscillating agent model (OAM), which is an intrinsic part of the novel oscillations-based multiagent system (OSIMAS) paradigm. The agent’s oscillating nature is inferred by empirical neuroscience observations....

Improvement of Air Fuel Ratio Model Using a Least Absolute Shrinkage and Selection Operator

Chanyut Khajorntraidet, Tielong Shen, Kazuhisa Ito
The improvement of an air-fuel ratio model based on in-cylinder pressure measurement is presented. This model has been applied for calculation of static air-fuel ratio of spark ignition (SI) engines. In addition, it can be replaced the lambda sensors in feedback air-fuel ratio control systems. However...

Research on Optimization of clinical Pathway Execution based on Multi-agent Simulation

Lili Song, Xueqing Guo
The clinical pathway execution is a complex system engineering related to multidisciplinary or multi-department collaboration such as examination, laboratory test, operation, nursing, etc. This paper has proposed a multi-agent based simulation method from the hospital system level, and some key technologies...

Modelling of Dynamical Properties of a Resonant Converter under Step Frequence- and Loaded Converter Changes

Michal Prazenica, Slavomir Kascak, Juraj Koscelnik, Ivan Lovas
Paper deals with investigation of two problems: frequency step changes, and step switching-off of the load of LCTLC resonant inverter. Since the changes of frequency in the range from fmin to fmax are desirable to be the input current of the LCTLC circuit not greater than nominal one, the load changes...

An Improved Delay-Dependent Globally Asymptotically Stability Criterion for the Static Neural Networks with Time-Varying Delay

Kai Mao, Bao Shi, Shudong Zhang
The globally asymptotic stability for static neural networks with time-varying delay is concerned in this paper. By delay fractioning technique and taking more delayed-state variables into account, a newly Lyapunov-Krasovskii Functional was constructed, together with the Jessen integral inequality and...

A Multi-objective Optimization Evaluation Based on Experimental Datum

Lei Wang, Tianzhong Sui
Aiming at multi-objective optimization problem of black-box system, the model of multi-objective optimization ED-ANN-NGA-FCE (Experimental Design-Artificial Neural Networks-Niche Genetic Algorithm-Fuzzy Comprehensive Evaluation) is established. A fuzzy evaluation for multi-objective Pareto-optimal set...

Build Prediction Models for Gold Prices Based on Back-Propagation Neural Network

Chingpei Lin
In recent years, international gold prices have been constantly rising, gold investment and preserve (or even appreciation) effects have been widely concerned by the market. Whether it is based on speculation, investment or hedging purposes, the gold has been incorporated into the asset allocation by...

The Existence and Simulations of Periodic Solution of Predator-prey Models with Impulsive Perturbations and Holling Type III Functional Responses

Kaihua Wang, Zhanji Gui
In this paper, a criterion for the existence of periodic solutions of predator-prey models with impulsive perturbations and Holling type III functional responses is established using the continuation theorem of coincidence degree theory and analysis techniques. Further, some numerical simulations show...

An Optimization Model for Inventory System based on Supply-demand Balance

Qingsong Jiang, Wei Xing
In order to investigate the inventory optimization of circulation enterprises, demand analysis was carried out firstly considering supply-demand balance. Then it was assumed that the demand process complied with mutually independent compound Poisson process. Based on this assumption, an optimization...

Deconvolution Estimation of the Density for Mixed Measure

Filali Mostafa, Sabre Rachid
Consider a random variable whose measure probability is the sum of an absolutely continuous part with respect to the Lebesgue measure and a discrete measure. In this work is provided a deconvolution estimator density of the continuous part and also the estimated amplitudes of discrete part when the observations...

The Quickest Delivery on the Super Pipeline Based Logistic System

Zhongyuan Lai, Hao Li, Tonghui Qian, Bo Wang
In this paper, we consider the problem of delivering replenishments from source to sink nodes on a delivery line in minimum time interval, where the halfway stopping and intercrossing are forbidden. We call this problem the quickest delivery problem, and define it in a mathematical way. We point out...

Simulation of Technological Parameters Changing with the Satiation Effect

Gennadiy Rubin, Marina Polyakova, Gennadiy Gun
Dynamics of several processes quantity parameters has S-shape curve character. It is proved by the fact that process may be described by two parameters: potentional limit of the growth and resource determinating this growth. Firstly such processes were investigated in biology. Later this approach was...

Numerical Imitation of the Synchronization of Gene Repressilators

Yu Wu, Junhui Gao
Jordi Garcia-Ojalvo and his partners published an article on PNS in 2004, building numerical models of synchronization of many gene oscillators. We got the examples of the process of synchronization by imitating the model with numerical value and studied on the relationship between the value of Q, the...

FDTD Simulation of a Mobile Phone Operating Near Metals

Nuttaka Homsup, Terapass Jariyanorawiss
This paper presents Finite Difference Time Domain (FDTD) simulation results of operating mobile phone near metal wall sheet and near a one metal cell. Results show that placing a one metal cell closed to a mobile phone is more harmful to human health than a metal wall sheet. The one metal cell is the...

Aerodynamic Performance Modeling and Optimization of Small Scale Wind Turbine Rotors

Athwel Gamarallage, Thusitha Sugathapala
This paper presents aerodynamic performance modeling and optimization of small scale wind turbine rotors for off-grid electricity generation applications targeting local manufacturing through simplification of blade geometry with constant chord and linear twist. The classical momentum theory and blade...

An Improved Passivity-Based Control to Buck Dc-Dc Converter

Yanhua Xian, Xiaoshu Luo
For the nonlinear characteristic of buck dc-dc converter and high demand of dynamic quality and robustness for the converter, a passivity-based control with an adjustable parameter for buck converter is proposed. Based on the nonlinear error model of buck converter, a feedback equivalence system is obtained...

An Application of the Direct Method of Liapunov in Stability Analysis of Semilinear Systems

Igor Dobovšek
An application of the direct method of Liapunov for establishing stability criteria of smooth solutions for a certain class of initial boundary value problems described by a system of semi-linear hyperbolic partial differential equations is discussed. The concept of Liapunov-like functional is utilized...

Improved Fast Time Reversible Algorithm and Its Applications to Large-Scale Simulation of Ice

Yasuhiro Kajima, Shuji Ogata
A time-reversible algorithm for the rotation of rigid body in the quaternion representation named “Improved Fast Time-reversible algorithm (IFT)” is proposed. In a preceding paper, we have proposed “Fast Time-reversible algorithm (FT)” that is not only time reversible but also conserves the total energy...

Systemic Research of Grid Upscaling on the Numerical Simulation of Oil Reservoir

Ziyi Liu, Jianwei Gu
Reservoir description needs to transform its geological model to a simulation model by means of dividing grids. Grid upscaling can reduce the number of geologic model’s grids, at the same time it can match the real geosphere. For further to see the impact characteristics of grid upscaling on the results...

The Optimization Model of Flat Folding Table

Tian’e Wang, Jian Li, Taiyang Niu, Baiqiang Guo
With the rapid development of industry design, the convenience and beautiful degree of the table got the attention of people, due to the folding table is easy to use and easy to transport, it has become an indispensable furniture in hotels, exhibitions and other places. Flat folding table design concept...

Research on Braking Force Distribution Strategy of Composite Braking System of Electric Vehicle

Kuiyang Wang, Liang Zhu, Shanfeng Wang
Based on analyzing the necessity of research on composite braking system of electric vehicle and its braking force distribution strategy, according to the ECE regulations and the requirements of braking stability, the optimized braking force distribution strategy and control logic are proposed for a...

Thermal Model and Analysis for Power Driver Circuit of Brushless DC Motor

Zhigang Gao, Jun Zhou, Peng Li
To solve the problem of the high temperature of the power driver circuit of BLDCM(Brushless DC Motor) which causes by the tardy heat dissipation, the thermal numerical model was built. The simulation results indicate that the thermal field distribution of the three-phase bridge power driver circuit is...