This document discusses methods for using traffic lights to dynamically merge traffic in work zones. It describes work zone classifications based on duration, type of interaction with the road, and work intensity. It also outlines common work zone layouts and the impacts of work zones on safety, mobility, cost, and the environment. The document then details a simulation experiment using the traffic simulation software Aimsun to test late merge metering controlled by traffic lights. It discusses calibrating the model and testing different metering scenarios like ALINEA, fixed cycle times, and continuous merging to analyze queue lengths, delay times, and traffic flow impacts.
The document reports results from tests measuring flow rate through channels with different slopes. It includes a table with measurements of collected volume, time taken, flow rate, depth, cross-sectional area, hydraulic radius, and velocity for each test. It then calculates average Manning's n, velocity, and hydraulic radius for each slope. Finally, it includes a graph of velocity versus the square root of slope times hydraulic radius for both slopes tested.
The document contains information about the expected returns and standard deviations of various securities and portfolios consisting of a risk-free asset and security X. It provides the expected returns and standard deviations for portfolios with different proportions of the risk-free asset and security X, ranging from 100% risk-free asset to 100% security X. A table also shows the expected returns, standard deviations, betas, and expected returns of various risky securities.
Mathematical modeling and Experimental Determination of Grade intermixing tim...Ankit Karwa
The document summarizes a project presentation on mathematical modeling and experimental determination of grade intermixing time in a single strand slab casting tundish.
Key points:
- Experiments were conducted on a scaled-down physical model of an industrial tundish to measure grade intermixing time under different operating parameters.
- Over 150 experiments were performed under 50 different conditions by varying residual volume, inflow rate, and outflow rate.
- Results show grade intermixing time decreases with decreasing residual volume and increasing outflow rate. It depends least on inflow rate.
- Dimensional analysis and regression analysis are being used to develop a mathematical correlation between grade intermixing time and the operating parameters.
LO1: Dealing with bus bunching, a control tool, a pilot plan and a peda…BRTCoE
Researchers at Pontificia Universidad Católica de Chile developed a real-time control tool to prevent bus bunching using vehicle holding and boarding limits. They conducted a successful pilot on line 210 in Santiago, Chile where excess waiting was reduced by over 60%. The tool optimized bus schedules in real-time to minimize passenger wait times. The researchers now aim to commercialize the tool and develop a pedagogical game to teach its use.
The document provides an agenda and instructions for an honors physics class, including checking homework, discussing upcoming labs and tests, and reviewing solutions to example problems from the textbook. Students are also given requirements and guidelines for constructing and testing a catapult project due later in the week.
This document describes a system for multiuser pre-equalized pre-rake ultra-wideband communications. It introduces pre-rake transmission and a multi-input single-output pre-equalized pre-rake system. The system model includes a central transmitter with multiple antennas, pre-equalizing filters, spreading codes, and pre-rake filters. The problem of optimizing the pre-equalization filters to minimize mean-square error under a total power constraint is formulated. This problem is shown to be a convex quadratically constrained quadratic program. Results demonstrate the system's ability to achieve quality of service constraints with minimal power budgets according to numerical simulations.
Roll eccentricity compensation system for an aluminium rolling millIan Caister
*Redacted for security*
This report describes the design of a controller to reduce the effect of roll eccentricity on an industrial rolling mill. First the problem is investigated and the project aim is described followed by an investigation of important domain specific concepts. Next, the iterative design, simulation, implementation and successful online production testing of a roll eccentricity compensator using a frequency based approach suitable for industrial applications is described. Finally, its performance is analyzed and recommendations for future improvement are made.
The document reports results from tests measuring flow rate through channels with different slopes. It includes a table with measurements of collected volume, time taken, flow rate, depth, cross-sectional area, hydraulic radius, and velocity for each test. It then calculates average Manning's n, velocity, and hydraulic radius for each slope. Finally, it includes a graph of velocity versus the square root of slope times hydraulic radius for both slopes tested.
The document contains information about the expected returns and standard deviations of various securities and portfolios consisting of a risk-free asset and security X. It provides the expected returns and standard deviations for portfolios with different proportions of the risk-free asset and security X, ranging from 100% risk-free asset to 100% security X. A table also shows the expected returns, standard deviations, betas, and expected returns of various risky securities.
Mathematical modeling and Experimental Determination of Grade intermixing tim...Ankit Karwa
The document summarizes a project presentation on mathematical modeling and experimental determination of grade intermixing time in a single strand slab casting tundish.
Key points:
- Experiments were conducted on a scaled-down physical model of an industrial tundish to measure grade intermixing time under different operating parameters.
- Over 150 experiments were performed under 50 different conditions by varying residual volume, inflow rate, and outflow rate.
- Results show grade intermixing time decreases with decreasing residual volume and increasing outflow rate. It depends least on inflow rate.
- Dimensional analysis and regression analysis are being used to develop a mathematical correlation between grade intermixing time and the operating parameters.
LO1: Dealing with bus bunching, a control tool, a pilot plan and a peda…BRTCoE
Researchers at Pontificia Universidad Católica de Chile developed a real-time control tool to prevent bus bunching using vehicle holding and boarding limits. They conducted a successful pilot on line 210 in Santiago, Chile where excess waiting was reduced by over 60%. The tool optimized bus schedules in real-time to minimize passenger wait times. The researchers now aim to commercialize the tool and develop a pedagogical game to teach its use.
The document provides an agenda and instructions for an honors physics class, including checking homework, discussing upcoming labs and tests, and reviewing solutions to example problems from the textbook. Students are also given requirements and guidelines for constructing and testing a catapult project due later in the week.
This document describes a system for multiuser pre-equalized pre-rake ultra-wideband communications. It introduces pre-rake transmission and a multi-input single-output pre-equalized pre-rake system. The system model includes a central transmitter with multiple antennas, pre-equalizing filters, spreading codes, and pre-rake filters. The problem of optimizing the pre-equalization filters to minimize mean-square error under a total power constraint is formulated. This problem is shown to be a convex quadratically constrained quadratic program. Results demonstrate the system's ability to achieve quality of service constraints with minimal power budgets according to numerical simulations.
Roll eccentricity compensation system for an aluminium rolling millIan Caister
*Redacted for security*
This report describes the design of a controller to reduce the effect of roll eccentricity on an industrial rolling mill. First the problem is investigated and the project aim is described followed by an investigation of important domain specific concepts. Next, the iterative design, simulation, implementation and successful online production testing of a roll eccentricity compensator using a frequency based approach suitable for industrial applications is described. Finally, its performance is analyzed and recommendations for future improvement are made.
In order to remove the ambiguity with respect to phase variation when using a component as a phase calibration element, proper alignment is required. This 4-slide-teaser puts things black and white. References are provided for those who are interested to go more in depth.
This document discusses surveying and troubleshooting water softeners. It covers monitoring softener performance, conducting a survey of softener operations, performing an elution study to evaluate regeneration efficiency, troubleshooting issues like short service runs or high hardness, analyzing resin samples, and identifies resources for additional information. The goal is to collect data, gain knowledge, and use available resources to properly maintain high-performing water softeners.
Applying Stepper Motors: Application Questions You Must Answer & Things to Wa...Design World
This webinar reviews some of the basic parameters necessary to properly select and apply stepper motor technology to motion applications. Topics included in this discussion review basic stepper speed-torque behavior including the stepper over-voltage ratio, a stepper in constant current operation vs. a stepper in voltage drive region, thermal ratings, the impact of winding changes on dynamic behavior, calculations and considerations for intermittent duty operation, motor/system accuracy, failure modes, and the application of all these criteria when applying stepper-based linear actuator products.
Engineers currently using stepper technology in their motion applications that want to understand how to apply stepper motor technology will benefit from this webinar.
In this webinar you will learn:
-Basic parameters necessary to properly select and apply stepper motor technology
-How to understand the stepper motor speed-torque curve and how to apply this to the application
-The main factors to consider when trying to optimize a stepper motor in a variety of applications
1. Traffic simulation can be used to model driver assistance systems and evaluate their impacts on traffic flow, safety, and the environment.
2. The presentation provides two examples - an overtaking assistant and adaptive cruise control (ACC) - and evaluates their effects using simulation.
3. For ACC, the simulation shows it improves trajectory smoothness for equipped vehicles but can influence traffic capacity and speeds depending on how the system and driver behavior are modeled.
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The document discusses the Oil Spill Information System (OSIS) tool for predicting oil spill trajectories and weathering. It is a GIS-based decision support tool that has been validated against real spill incidents. It can provide maps, graphs, and status updates on spill characteristics over time to aid response. The document also discusses an autonomous underwater vehicle called Shoal being developed for pollution monitoring, and localization and communication technologies. Finally, it presents on the SUSY project objectives to develop a modular balloon system for ship rescue applications like fishing vessels, ferries, and salvage operations.
This document presents a new micromechanics-based approach for evaluating the rutting potential of asphalt pavements using a gyratory compactor. The approach focuses on inducing conditions of impending instability by applying high shear stresses during compaction. Mixtures are compacted to 7% air voids at 1.25° then 2.5° to induce aggregate rearrangement. Gyratory shear strength and vertical strain are monitored. Failure strain is defined as the strain at minimum shear strength after increasing the angle. The approach categorizes mixtures based on gyratory shear slope and failure strain. Testing of 31 mixtures supported the validity and ability of the approach to predict rutting performance compared to APA results.
Dr. mansour el bardisi -noise impact assessment for metro and railwayimadhammoud
The document discusses a noise impact assessment for a proposed high-speed rail project in Saudi Arabia called the Haramain High Speed Rail. Baseline noise and vibration measurements were taken along the proposed rail alignment. Noise prediction modeling was conducted and validated against baseline data. The modeling results show the rail line will increase noise levels near residential areas along the alignment. Mitigation measures will need to be implemented during design and operation to minimize noise impacts on surrounding communities.
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Conference proceedings can be found at https://ieeexplore.ieee.org/document/8714539
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Deccan UGC 2011 Chiefs Forum - Seattle Fire Presentation - P Di Turipdituri
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Similar to Session 20 Daniel Furda, Bahareh Saffarian (9)
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Session 20 Daniel Furda, Bahareh Saffarian
1. Methods for work zone dynamic
merge using traffic lights
Daniel Furda, Bahareh Saffarian
Linköpings universitet
2. Definition
A segment influenced by works on, near or above it
2
3. Work zone classifications
• Duration of the work
• Type of the interaction between road and the work
zone
• Work intensity
3
4. Work zone Layouts
• Advanced warning area
• Transition area
• Working(activity) area
• Termination area
Advanced Transition Activity Termination
Warning Area Area Area
Area
4
5. Work zone impacts
safety
Work zone
cost mobility
impacts
Environ-
mental
5
6. Work zone traffic performance analysis
• Mobility analysis( V/C, LOS, travel time delay)
• Safety analysis
• Delay and cost analysis
6
7. significant influential factors
• Heavy vehicle percentage
• Number of open and close lanes
• Work intensity
• Position of closed lanes
• Weather conditions
• Lane width
• Ramp distance
• Temporary speed limit
• Work zone length
7
Work zone, in general, can be defined as a part of a road facility influenced by a construction activity occures on, near or above it. The difinition also includes the complete section of the road containing different road work traffic controls and equipments.
They can be classified based on different factors such as the duration of the work ( long, intermediate, short, short duration and mobile), type of interaction( off roadway and on road ways) and work intensity( lightest, light, moderate, heavy, very heavy and heaviest)
A work zone normally is a combination of four general parts. The firat part of a work zone is called advanced warning area in which the info about the upcoming work zone are given to the road user by means of regular sequences of sign, messages and control devices.The second part is the transition areawhich is between the advanced area and the start of the actual work where drivers are led to the open lane. The third part is the actual area that the activity is taking place and finally the termination area where the traffic is returned to the basic road condition.