A simulation-based framework for checkpoint design in large-scale crowd management: Case study of the papal mass in philadelphia

In the field of engineering and construction, unqualified construction quality, time delays, cost more than expected phenomena to occur. Because of these characteristics such as its large-scale construction projects, long cycle, the production of single and complex, there is greater risk than the production of general products, the risk increases the difficulty of construction project management, operating costs and the possibility of potential losses, therefore, risk management emerged and become an increasingly important integral part of project management. In this paper, fuzzy analytic hierarchy be used to construction project risk assessment, and to order the sort of each risk in order to prevent significant risks. On an actual project - the new stadium construction in Weifang City risk management case study, the reduction of risk of project failure is expected, but also the project is hoped for other industries to provide some reference for risk management.

Download Full-text

Simulation based programming for optimization of large-scale rainwater harvesting system: Malaysia case study

Resources Conservation and Recycling ◽

10.1016/j.resconrec.2013.05.001 ◽

2013 ◽

Vol 80 ◽

pp. 1-9 ◽

Cited By ~ 27

Author(s):

H. Hashim ◽

A. Hudzori ◽

Z. Yusop ◽

W.S. Ho

Keyword(s):

Large Scale ◽

Rainwater Harvesting ◽

Simulation Based

Download Full-text

Delivery Demand Peak Leveling Based on Customer’s Acceptance Capability Analysis

Advances in Transdisciplinary Engineering - Transdisciplinary Engineering for Complex Socio-technical Systems – Real-life Applications ◽

10.3233/atde200129 ◽

2020 ◽

Author(s):

Yuki Matsuda ◽

Kenji Tanaka

Keyword(s):

Vehicle Routing ◽

Large Scale ◽

Implicit Assumption ◽

Transdisciplinary Approach ◽

Allocation System ◽

Work Plan ◽

Simulation Based ◽

Capability Analysis ◽

Customer Analysis

As large scale E-commerace platforms rise, the delivery demand peaks are becoming more remarkable. This is mainly caused by sale promotions and one-day delivery promises. In this field, there is an implicit assumption that re-allocating the deliveries to level delivery peak results in lowering customer utility and thus, the mainstream approach is to make efficient the work plan in given conditions. This paper analyzes real delivery data, and indicates the possibility of delivery re-allocation without lowering customer utility, if an transdisciplinary approach of customer analysis and vehicle routing is applied. A delivery allocation system based on this implication was proposed, and a simulation based case study was conducted. Through this, the effect on delivery demand peak leveling without lowering customer utility, was verified.

Download Full-text

Efficient Simulation-Based Toll Optimization for Large-Scale Networks

Transportation Science ◽

10.1287/trsc.2021.1043 ◽

2021 ◽

Author(s):

Carolina Osorio ◽

Bilge Atasoy

Keyword(s):

Analytical Model ◽

Nonlinear Equations ◽

Network Model ◽

Large Scale ◽

Structural Information ◽

Optimization Technique ◽

Simulation Based ◽

Simulation Based Optimization ◽

Large Scale Networks

This paper proposes a simulation-based optimization technique for high-dimensional toll optimization problems of large-scale road networks. We formulate a novel analytical network model. The latter is embedded within a metamodel simulation-based optimization (SO) algorithm. It provides analytical and differentiable structural information of the underlying problem to the SO algorithm. Hence, the algorithm no longer treats the simulator as a black box. The analytical model is formulated as a system of nonlinear equations that can be efficiently evaluated with standard solvers. The dimension of the system of equations scales linearly with network size. It scales independently of the dimension of the route choice set and of link attributes such as link length. Hence, it is a scalable formulation suitable for the optimization of large-scale networks. For instance, the model is used in the case study of the paper for toll optimization of a Singapore network with more than 4,050 OD (origin-destination) pairs and 18,200 feasible routes. The corresponding analytical model is implemented as a system of 860 nonlinear equations. The analytical network model is validated based on one-dimensional toy network problems. It captures the main trends of the simulation-based objective function and, more importantly, accurately locates the global optimum for all experiments. The proposed SO approach is then used to optimize a set of 16 tolls for the network of expressways and major arterials of Singapore. The proposed method is compared with a general-purpose algorithm. The proposed method identifies good quality solutions at the very first iteration. The benchmark method identifies solutions with similar performance after 2 days of computation or similarly after more than 30 points have been simulated. The case study indicates that the analytical structural information provided to the algorithm by the analytical network model enables it to (i) identify good quality solutions fast and (ii) become robust to both the quality of the initial points and to the stochasticity of the simulator. The final solutions identified by the proposed algorithm outperform those of the benchmark method by an average of 18%.

Download Full-text

Large-Scale Construction Equipment Joint Simulation Based on Multi-Body Dynamics Theory

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.268-270.101 ◽

2011 ◽

Vol 268-270 ◽

pp. 101-105 ◽

Cited By ~ 1

Author(s):

Yu Hong Li ◽

Ling Xiao Nie ◽

Shan Ding

Keyword(s):

Large Scale ◽

Scale Construction ◽

Construction Equipment ◽

Joint Simulation ◽

Simulation Based ◽

Body Dynamics ◽

Engineering Practices ◽

Multi Body ◽

The Given

In order to ensure the efficiency and safety of construction process control and failure analysis for the large-scale construction equipment in water conservancy engineering, which is based on specified equipment for some real engineering practices, namely TC2400-tower belt crane, a multi-body joint simulation dynamical model is given in this paper. Then, the data flow and operational process of the model are analyzed. Finally, a case study based on ADAMS and SOLIDWORKS platforms is performed to verify the validity and rationality of the given model.

Download Full-text

Applying Crowd Risk Mitigation Technologies in Urban Sport Events

Events and Tourism Review ◽

10.18060/25839 ◽

2021 ◽

Vol 4 (2) ◽

Author(s):

Kennedy Weaver ◽

Bingjie Liu-Lastres Liu-Lastres

Keyword(s):

Large Scale ◽

Respiratory Infections ◽

Risk Mitigation ◽

Management Strategies ◽

Event Management ◽

Crowd Management ◽

Shared Spaces ◽

Sport Events

In recent years, the need for advanced precautions for mitigating the risks imposed by events, which involve high volumes of people in shared spaces, has multiplied. The occurrence of COVID-19 pandemic has further altered event practices, spaces, and event attendees’ mindsets in large-scale events. Proper crowd management not only seeks to prevent acts of violence and injury, but in today’s event environments; efforts should be consciously applied to reduce the spread of respiratory infections such as COVID-19. As the events industry continues to evolve and face new limitations, ways in which event organizers respond must evolve as well. Smartphone technologies are opening new ways for event organizers to communicate with and monitor attendees. This case study explores current crowd management strategies, analyzes the gaps in widely used models, and finally proposes event management technologies trending in the field.

Download Full-text

A Family With Autosomal-Dominant Progressive Sensorineural Hearing Loss

American Journal of Audiology ◽

10.1044/1059-0889.0501.23 ◽

1996 ◽

Vol 5 (1) ◽

pp. 23-32 ◽

Cited By ~ 3

Author(s):

Chris Halpin ◽

Barbara Herrmann ◽

Margaret Whearty

Keyword(s):

Speech Production ◽

Hearing Aids ◽

Role Models ◽

Speech Intelligibility ◽

Large Scale ◽

Speech Language Pathology ◽

The Family ◽

Patient Will ◽

Language Pathology

The family described in this article provides an unusual opportunity to relate findings from genetic, histological, electrophysiological, psychophysical, and rehabilitative investigation. Although the total number evaluated is large (49), the known, living affected population is smaller (14), and these are spread from age 20 to age 59. As a result, the findings described above are those of a large-scale case study. Clearly, more data will be available through longitudinal study of the individuals documented in the course of this investigation but, given the slow nature of the progression in this disease, such studies will be undertaken after an interval of several years. The general picture presented to the audiologist who must rehabilitate these cases is that of a progressive cochlear degeneration that affects only thresholds at first, and then rapidly diminishes speech intelligibility. The expected result is that, after normal language development, the patient may accept hearing aids well, encouraged by the support of the family. Performance and satisfaction with the hearing aids is good, until the onset of the speech intelligibility loss, at which time the patient will encounter serious difficulties and may reject hearing aids as unhelpful. As the histological and electrophysiological results indicate, however, the eighth nerve remains viable, especially in the younger affected members, and success with cochlear implantation may be expected. Audiologic counseling efforts are aided by the presence of role models and support from the other affected members of the family. Speech-language pathology services were not considered important by the members of this family since their speech production developed normally and has remained very good. Self-correction of speech was supported by hearing aids and cochlear implants (Case 5’s speech production was documented in Perkell, Lane, Svirsky, & Webster, 1992). These patients received genetic counseling and, due to the high penetrance of the disease, exhibited serious concerns regarding future generations and the hope of a cure.

Download Full-text