Integrated Dynamic Model Simulation for Multi Layer-Partially Leaking Fault Gas Reservoirs: Unlocking West Stupa Potential, Stupa Field South Mahakam

2018 ◽  
Author(s):  
A. S. Ashfahani
Keyword(s):  
Dynamic Model ◽  
Model Simulation ◽  
Gas Reservoirs ◽  
Fault Gas

scholarly journals Research about the optimal strategies for prevention and control of varicella outbreak in a school in a central city of China: based on an SEIR dynamic model

2020 ◽  
Vol 148 ◽  
Author(s):  
Wen-ting Zha ◽  
Feng-rui Pang ◽  
Nan Zhou ◽  
Bin Wu ◽  
Ying Liu ◽  
...  
Keyword(s):  
Dynamic Model ◽  
Prevention And Control ◽  
Model Simulation ◽  
Central City ◽  
Control Measures ◽  
Peak Time ◽  
Cumulative Number ◽  
And Control ◽  
Epidemiological Characteristics ◽  
Combined Interventions

Abstract Varicella is an acute respiratory infectious diseases, with high transmissibility and quick dissemination. In this study, an SEIR (susceptible-exposed-infected-recovered) dynamic model was established to explore the optimal prevention and control measures according to the epidemiological characteristics about varicella outbreak in a school in a central city of China. Berkeley Madonna 8.3.18 and Microsoft Office Excel 2010 software were employed for the model simulation and data management, respectively. The result showed that the simulated result of SEIR model agreed well with the reported data when β (infected rate) equal to 0.067. Models showed that the cumulative number of cases was only 13 when isolation adopted when the infected individuals were identified (assuming isolation rate was up to 100%); the cumulative number of cases was only two and the TAR (total attack rate) was 0.56% when the vaccination coefficient reached 50%. The cumulative number of cases did not change significantly with the change of efficiency of ventilation and disinfection, but the peak time was delayed; when δ (vaccination coefficient) = 0.1, m (ventilation efficiency) = 0.7 or δ = 0.2, m = 0.5 or δ = 0.3, m = 0.1 or δ = 0.4 and above, the cumulative number of cases would reduce to one case and TAR would reduce to 0.28% with combined interventions. Varicella outbreak in school could be controlled through strict isolation or vaccination singly; combined interventions have been adopted when the vaccination coefficient was low.

Dynamic model simulation of arc formation in vacuum circuit breaker

2010 ◽  
Author(s):  
Yundong Cao ◽  
Jiwei Zhao ◽  
Jing Li ◽  
Heng Lin ◽  
Xiaoming Liu ◽  
...  
Keyword(s):  
Dynamic Model ◽  
Model Simulation ◽  
Circuit Breaker ◽  
Vacuum Circuit Breaker

Effect of Tractor-Semitrailer Velocity on Cornering Braking Stability

2014 ◽  
Vol 697 ◽  
pp. 334-339
Author(s):  
Chen Li ◽  
Shang Bin Song ◽  
Ge Teng Tang ◽  
Hui Qi Shi
Keyword(s):  
Dynamic Model ◽  
Model Simulation ◽  
Lateral Acceleration ◽  
Vehicle Speed ◽  
Initial Speed ◽  
Model Output ◽  
Yaw Rate ◽  
Braking Distance ◽  
Braking Process ◽  
The Stability

A dynamic model of tractor-semitrailer cornering braking was established in this paper. The accuracy of the model was tested and verified by comparing model output with data of tractor-semitrailer test. By model simulation of the cornering braking process, initial speed such as 20km/h, 25km/h, 30km/h, 35km/h, 40km/h was chosen to analyzed the changing curve of braking distance, articulation angle, yaw rate and lateral acceleration. The result shows that during cornering braking of tractor-semitrailer, with the increasing of initial speed, braking distance greatly increased, articulation angle, yaw rate and lateral acceleration are all increasing. Thus, when braking in a turn, the vehicle speed must be reduced to ensure the stability of tractor-semitrailer cornering braking.

scholarly journals MONITORING THE PERFORMANCE OF STATE STRUCTURE PLAN IN DELIVERING OUTPUT USING DYNAMIC MODEL

2016 ◽  
Author(s):  
Muhammad Faris Abdullah ◽  
Alias Abdullah ◽  
Rustam Khairi Zahari ◽  
Samsuddin Jaafar
Keyword(s):  
Dynamic Model ◽  
Model Simulation ◽  
Material Objects ◽  
State Structure ◽  
Planning Period ◽  
Open Spaces ◽  
Public Facilities ◽  
Output Monitoring ◽  
Plan Output ◽  
Monitoring Performance

Plan outputs are the material objects that are tangible and provided as a result of the implementation of a development plan. They often act as precursor to achieving plan outcomes. Therefore, it is important to monitor the performance of plan in delivering its outputs so that the prospect of achieving its outcomes remains high. However, present state structure plan monitoring programmes focus mostly on monitoring land use change and not plan output delivery. The absence of output monitoring reduces the usefulness of the programmes and contributes to under-provision of outputs, especially public facilities and open spaces. This study proposes that state structure plan monitoring programmes must include mechanism to monitor the performance of the plan in delivering plan outputs. To this end, a dynamic model for monitoring performance of state structure plan in delivering open spaces was developed using STELLA software and applied on the Selangor State Structure Plan. The model simulation showed that the Selangor State Structure Plan has performed poorly in delivering the open spaces where their provision has not conform to the plan’s targets. The model simulations also show that this nonconformances will remain by the end of the plan’s planning period.

Locally Linearized Dynamic Analysis of Parallel Manipulators and Application of Input Shaping to Reduce Vibrations

2004 ◽  
Vol 126 (1) ◽  
pp. 156-168 ◽  
Author(s):  
Kris Kozak ◽  
Imme Ebert-Uphoff ◽  
William Singhose
Keyword(s):  
Dynamic Model ◽  
Degrees Of Freedom ◽  
Natural Frequencies ◽  
Model Simulation ◽  
Parallel Architecture ◽  
Robotic Manipulators ◽  
Parallel Manipulators ◽  
Dynamic Equations ◽  
Input Shaping ◽  
Multiple Degrees Of Freedom

Input Shaping is a technique that seeks to reduce residual vibrations through modification of the reference command given to a system. Namely the reference command is convolved with a suitable train of impulses. Input shaping has proven to be successful in reducing the vibrations of a great variety of linear systems. This article seeks to apply input shaping to robotic manipulators of parallel architecture. Such systems have multiple degrees-of-freedom and non-linear dynamics and therefore standard input shaping techniques cannot be readily applied. In order to apply standard input shaping techniques to such systems, this article linearizes the dynamic equations of the system locally and determines the configuration-dependent natural frequencies and damping ratios throughout its workspace. Techniques are developed to derive the dynamic equations directly in linearized form. The method is demonstrated for a sample manipulator with two degrees-of-freedom. A linearized dynamic model is derived and input shaping is locally tuned according to the linearized dynamic model. Simulation results are provided and discussed.

Modeling and Movement Simulation of Tractor-Semitrailer

2014 ◽  
Vol 998-999 ◽  
pp. 438-441
Author(s):  
Chuan Hui Liu ◽  
Yi Fang ◽  
Feng Du ◽  
Rong Wei Shen
Keyword(s):  
Dynamic Model ◽  
Nonlinear Dynamic ◽  
Model Simulation ◽  
Slip Angle ◽  
Tire Model ◽  
Nonlinear Dynamic Model ◽  
Software Environment ◽  
Steering Angle ◽  
Set Up ◽  
Movement Simulation

The Gim tire model was adopted to set up the nonlinear dynamic model of tractor-semitrailer. Choosing slip angle of tractor, yaw velocity of tractor and semitrailer as variables, the state space equation was proposed. Based on the established nonlinear dynamic model, simulation in Matlab/Simulink software environment was described. The simulation consults suggest that for tractor-semitrailer, it would lose stability with higher speed and bigger steering angle. The conclusion can be useful for the system design of tractor-semitrailer.

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