Sharif Digital Repository

A Customized Particle Swarm Method to Solve Highway Alignment Optimization Problem

Author

Shafahi, Y.

Pub. Year

2013

Subjects

Complex problems. / Constrained problem. / Design considerations. / Design process. / Geographical information systems. / Highway alignment. / Infinite numbers. / Objective functions. / Particle swarm. / Particle swarm optimization algorithm. / Search method. / Search spaces. / Spatial informations. / Vertical alignment. / Algorithms. / Constraint theory. / Costs. / Design. / Geographic information systems. / Particle swarm optimization (PSO) / Highway planning. / Algorithm. / GIS. / Mapping. / Optimization. / Road construction.

A practical model for transfer optimization in a transit network: Model formulations and solutions

Author

Shafahi, Y.

Pub. Year

2010

Subjects

Transit scheduling. / Departure time. / Genetic algorithm approach. / In-line. / Larger networks. / Mixed integer programming model. / Model formulation. / Optimal values. / Practical model. / Public transportation. / Real-life networks. / Simple networks. / Stopping time. / Transfer coordination. / Transit networks. / Waiting time. / Diesel engines. / Genetic algorithms. / Integer programming. / Mass transportation. / Optimization. / Transfer stations. / Scheduling algorithms. / Genetic algorithm. / Numerical model. / Public transport. / Travel behavior.

A practical O-D matrix estimation model based on fuzzy set theory for large cities

Author

Shafahi, Y.

Pub. Year

2009

Subjects

Fuzzy theoiy. / O-D matrix estimation. / Traffic counts. / Data collection. / Estimation methods. / Fuzzy numbers. / Fuzzy rule based. / Fuzzy theoiy. / Gradient based. / Large cities. / Large networks. / O-D matrix. / Origin destination. / Traffic counts. / Transportation planning. / Travel analysis. / Estimation. / Fuzzy rules. / Fuzzy set theory. / Internet protocols. / Quality control. / Transportation. / Dies.

Application of a maintenance management model for iranian railways based on the markov chain and probabilistic dynamic programming

Author

Shafahi, Y.

Pub. Year

2009

Subjects

Markov chain. / Cumulative damage models. / Economic incentive. / Geographical locations. / Maintenance management. / Optimal maintenance. / Planning horizons. / Probabilistic dynamic programming. / Railway system. / Railways. / Safety standard. / Service levels. / Survey data. / Track maintenance. / Track state. / Traffic loads. / Train operator. / Transition matrices. / Maintenance. / Markov processes. / Optimization. / Railroad transportation. / Railroads. / Security of data. / Dynamic programming. / Decision making. / Incentive. / Numerical model. / Probability. / Railway transport. / Traffic congestion. / Transportation development. / Transportation economics. / transportation safety. / Iran.

Application of fuzzy theory for traffic assignment

Author

Shafahi, Y.

Pub. Year

2007

Subjects

Automobile drivers. / Fuzzy sets. / Membership functions. / Process engineering. / Risk perception. / Set theory. / Traffic surveys. / Transportation. / Transportation personnel. / Driver behaviors. / Fuzzy assignments. / Fuzzy set theories. / Fuzzy theories. / Fuzzy travel time. / Fuzzy user equilibrium. / Route choices. / Traffic assignment. / Traffic assignments. / Travel times. / Urban transportation planning processes. / User equilibriums. / Traffic control.

Disaggregate mode choice analysis for work trips using genetic-fuzzy and neuro-fuzzy systems

Author

Shafahi, Y.

Pub. Year

2006

Subjects

Artificial intelligence. / Bionics. / Fuzzy logic. / Fuzzy systems. / Soft computing. / Theorem proving. / Transportation. / Artificial intelligence methods. / Complex engineering problems. / Developed models. / Large cities. / Mode choice analysis. / Mode choices. / Neuro-fuzzy systems. / Urban transportation demand analysis. / Urban transportation systems. / Urban trips. / Neural networks.

A new fuzzy logic algorithm application in the design of signalized intersection control system

Author

Shafahi, Y.

Pub. Year

2006

Subjects

Controlling methods. / Delay Time. / Fuzzy logic algorithms. / Fuzzy methods. / In-vehicle. / Population growth. / Route networks. / Signalized intersection. / Simulated environment. / Simulation. / Traffic conditions. / Traffic Engineering. / Travel demand. / Algorithms. / Cybernetics. / Fuzzy control. / Fuzzy logic. / Highway engineering. / Information science. / Information systems. / Management information systems. / Motor transportation. / Population statistics. / Systems analysis. / Traffic congestion. / Traffic signals. / Travel time. / Urban growth.

A comparison between Single Point and Conventional Urban Diamond Interchanges based on estimated delay

Author

Shafahi, Y.

Publisher

Sharif University of Technology,

Pub. Year

2003

Subjects

Traffic. / Signal.