Simulation Study on Main Affect Factors to the Evacuation Corridor

2012 ◽  
Vol 170-173 ◽  
pp. 3533-3538 ◽  
Author(s):  
Yi Zhou Chen ◽  
Si Jing Cai ◽  
Yun Feng Deng
Keyword(s):  
Simulation Study ◽  
Emergency Evacuation ◽  
Simulation Software ◽  
Primary Factor ◽  
Pedestrian Evacuation ◽  
The Right ◽  
Efficiency And Reliability ◽  
Increase Efficiency

The primary goal of emergency evacuation for pedestrians is evacuating as many people as possible to safe areas in a shortest time when the accident occurred. And the primary factor of pedestrian evacuation is egress. According to the literature, we can know that the reasonable design of the evacuation corridor and the right guidance to pedestrians are very important, and analyzed main affect factors to the evacuation corridor, which affect of the evacuation speed for corridor at different pedestrian flows intensity, the width of evacuation corridor, setting canalization to corridor and the size of space of corridor peripheral. This paper use VISSIM simulation software to study on pedestrian flows evacuation. So the formulation for pedestrian evacuation program should consider a variety of elements for the design of the evacuation egress and corridors to increase efficiency and reliability for pedestrian evacuation.

scholarly journals Right-sided Bochdalek hernia in an adult with hepatic malformation and intestinal malrotation

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Naoki Enomoto ◽  
Kazuhiko Yamada ◽  
Daiki Kato ◽  
Shusuke Yagi ◽  
Hitomi Wake ◽  
...  
Keyword(s):  
Elective Surgery ◽  
Abdominal Cavity ◽  
Three Dimensional ◽  
Simulation Software ◽  
3D Simulation ◽  
Diaphragmatic Defect ◽  
Intestinal Malrotation ◽  
Intestinal Loop ◽  
Bochdalek Hernia ◽  
The Right

Abstract Background Bochdalek hernia is a common congenital diaphragmatic defect that usually manifests with cardiopulmonary insufficiency in neonates. It is very rare in adults, and symptomatic cases are mostly left-sided. Diaphragmatic defects generally warrant immediate surgical intervention to reduce the risk of incarceration or strangulation of the displaced viscera. Case presentation A 47-year-old woman presented with dyspnea on exertion. Computed tomography revealed that a large part of the intestinal loop with superior mesenteric vessels and the right kidney were displaced into the right thoracic cavity. Preoperative three-dimensional (3D) simulation software visualized detailed anatomy of displaced viscera and the precise location and size of the diaphragmatic defect. She underwent elective surgery after concomitant pulmonary hypertension was stabilized preoperatively. The laparotomic approach was adopted. Malformation of the liver and the presence of intestinal malrotation were confirmed during the operation. The distal part of the duodenum, jejunum, ileum, colon, and right kidney were reduced into the abdominal cavity consecutively. A large-sized oval defect was closed with monofilament polypropylene mesh. No complications occurred postoperatively. Conclusion Symptomatic right-sided Bochdalek hernia in adults is exceedingly rare and is frequently accompanied by various visceral anomalies. Accurate diagnosis and appropriate surgical repair are crucial to prevent possible incarceration or strangulation. The preoperative 3D simulation provided comprehensive information on anatomy and concomitant anomalies and helped surgeons plan the operation meticulously and perform procedures safely.

scholarly journals COMPARISON OF BASIC MAINTENANCE CONCEPTS USING WITNESS

2021 ◽  
Vol 2021 (6) ◽  
pp. 5435-5440
Author(s):  
VLADIMIRA SCHINDLEROVA ◽  
◽  
IVANA SAJDLEROVA ◽  
Keyword(s):  
21St Century ◽  
Simulation Software ◽  
Predictive Maintenance ◽  
Maintenance Management ◽  
Practical Application ◽  
Manufactured Products ◽  
The Right ◽  
Positive Effect ◽  
Production Facilities

Maintenance is a complex, extensive and important issue in terms of its impact on the quality of manufactured products or services provided in all areas of industry. The importance of predictive maintenance for the industry in the 21st century is crucial. However, the right approach to maintenance management is often underestimated in many companies today, although it can have a very positive effect on the company’s efficiency. Using the example of a practical application, the paper includes a comparison of three main maintenance concepts – classical (reactive), planned, predictive through the simulation software Witness. Maintenance concepts are compared in terms of their ability to solve and eliminate failures that occur in production facilities during operation.

Simulation Study on the Frame of Pipe End Upsetting Machine and its Structure Optimization

2011 ◽  
Vol 337 ◽  
pp. 307-312
Author(s):  
Rui Jie Gu ◽  
Gang Lei ◽  
Guo Dong Shao ◽  
Ming Jie Ren ◽  
Yun Hai Jing ◽  
...  
Keyword(s):  
Stress Concentration ◽  
Simulation Study ◽  
Fe Simulation ◽  
Structure Optimization ◽  
Hydraulic Press ◽  
Simulation Software ◽  
Fe Model ◽  
Corner Radius ◽  
Torsion Deformation

The FE model of the frame of pipe end upsetting machine is built with FE simulation software ABAQUS in the study. With the FE model, the force status of the frame is studied. By which, it is found that stress concentration occurs at the inner corner of the frame and bigger corner radius can improve the stress status; the stress of main cylinder body on the up beam is high because of the action of hydraulic press; the frame is bent outward in the up-down direction and bent inward in the left-right direction when the tube is clamped tightly; the earlier deformation of the frame is improved when the tube is upset, but the torsion deformation is found in the frame; the frame is optimized and the strength and the stiffness of the optimized frame can be satisfied with the requirement of application. The results of the study are very useful to design the frame of the pipe end upsetting machine.

SIMULATION STUDY ON THE EMERGENCY EVACUATION OF NUCLEAR POWER PLANT SITE

2019 ◽  
Vol 2019.27 (0) ◽  
pp. 1501
Author(s):  
Jiemin ZHANG ◽  
Yunzhe JI ◽  
Hongtao Lin ◽  
Na XUE ◽  
Xinjian LIU ◽  
...  
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Simulation Study ◽  
Nuclear Power ◽  
Emergency Evacuation ◽  
Plant Site

Simulation Analysis of Emergency Evacuation on Large Passenger Rail Terminal

2010 ◽  
Vol 148-149 ◽  
pp. 92-98
Author(s):  
Ying Hui Liang ◽  
Xi Zhang ◽  
Pan Zheng
Keyword(s):  
Operations Management ◽  
Simulation Analysis ◽  
Emergency Evacuation ◽  
Simulation Software ◽  
Simulation Program ◽  
It Use ◽  
Simulation Test ◽  
Evacuation Simulation ◽  
Passenger Rail ◽  
Terminal Operations

Emergency evacuation of large passenger station passenger terminal operations management is an important part of management. In this paper, it use legion simulation software, on the Beijing South Railway Station passenger emergency evacuation simulation test, first introduced the Legion simulation software and simulation process, followed by the design of the total number of 5000 and 10,000 people in different device configurations evacuation simulation program; re-use simulation software legion For each program the simulation analysis, the number of the simulation program evacuation and evacuation density optimization Finally, emergency evacuation measures and proposals for the reasonable development of passenger flow planning and organization of decision support programs.

scholarly journals Automated external defibrillation training on the left or the right side – a randomized simulation study

2017 ◽  
Vol Volume 9 ◽  
pp. 73-79 ◽  
Author(s):  
Mathilde Stærk ◽  
Henrik Bødtker ◽  
Kasper G Lauridsen ◽  
Bo Løfgren
Keyword(s):  
Simulation Study ◽  
Automated External Defibrillation ◽  
The Right

scholarly journals Oxygen transport and release of adenosine triphosphate in micro-channels and arterioles in the human microcirculation

2014 ◽  
Author(s):  
Terry Moschandreou
Keyword(s):  
Oxygen Transport ◽  
Rapid Change ◽  
Microfluidic Channel ◽  
Simulation Software ◽  
Time Dependent ◽  
Permeable Membrane ◽  
Micro Channels ◽  
Free Region ◽  
Channel Tube ◽  
The Right

The governing nonlinear equations for oxygen transport and ATP concentration in a microfluidic channel and tube are solved with the aid of Maple and COMSOL Multiphysics simulation software. Considering a cell-rich and cell free region with RBCs and blood plasma, we obtain results showing clearly that there is a significant decrease in oxygen tension in the vicinity of an oxygen permeable membrane placed midway on the upper channel/tube wall and to the right side of it in the downstream field. The purpose of the membrane is to cause a rapid change in oxygen saturation as RBC’s flow through channel/tube. To the right of the membrane downstream the greatest amount of ATP is released. Finally the corresponding time-dependent oxygen transport problem for plug flow in a channel, which has not been simulated in previous models in the literature, is analyzed and different starting times are shown for ATP release at different points in the channel. The FE modelling is very accurate: The time evolution problem is modelled and solved in it`s entirety with exact parameters used in the literature for blood flow and oxygen transport in the microcirculation. A comparison is made between the steady state and time dependent solutions in order to validate the results. The implications of the time dependent model for biological systems such as the human microcirculation requires exact information on release of energy as ATP is released from blood cells and the present work is important in providing this information.

Simulating Passenger Evacuation in Railway Station under Fire Emergency using Safe Zone Approach

2020 ◽  
Vol 2674 (11) ◽  
pp. 806-812
Author(s):  
Amir Hossein Salarian ◽  
Aida Mashhadizadeh ◽  
Morteza Bagheri
Keyword(s):  
Emergency Evacuation ◽  
Safe Zone ◽  
Simulation Software ◽  
Evacuation Time ◽  
Railway Station ◽  
Railway Stations ◽  
Service Levels ◽  
Proposed Model ◽  
The City ◽  
Safe Zones

Railway stations are usually considered to be one of the main gathering centers of the city; thus, in the event of any incident, there will be significant casualties. The purpose of this study is to simulate strategies for reducing the evacuation time of the railway station in the event of fire using a safe zone approach with simulation software. To reduce the evacuation time, 18 scenarios were introduced and simulated according to (1) number of gates and exit doors, (2) width of the gates, (3) obstacles, (4) priority of the exit doors, and (5) safe zone. The results show that the best evacuation time occurs by increasing the number of exit doors from two to four and considering a safe zone simultaneously; the evacuation time is reduced by 7 min and 19 s. Using safe zones for emergency evacuation has a significant role in reducing evacuation time and improving service levels. Interestingly, the removal of gates and obstacles would increase the evacuation time of passengers. The proposed model could be used for renovating existing railway stations to decrease the consequences of accidents such as fire.

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