Sharif Digital Repository

SUVs are susceptible to rollover in high speed due to their shape and high center of mass. This causes numerous limitations for this class of vehicles thus preventing their rollover is a prime issue. In this study, two flywheels with high angular momentum have been used to provide stabilizing momentum on the onset of rollover. However, if these flywheels keep rotating during the normal driving, they will cause maneuvering limitations for the car. The idea of using flywheels is completed by bringing them to speed in a few hundredth of a second when the vehicle is suspicious to rollover.To achieve this, dynamics of the car before and after lift off of one side is investigated. Also the dynamic... 

During live broadcast of sports events (such as soccer matches), it is usually useful to provide more information to the audience by adding graphical elements to the video feed; elements such as offside line, distance to goal, and virtual advertisement. This requires to extract information about the camera; for instance, camera position, rotation, and focal length. Hence, we need a method to find the camera calibration data from the image. Previous works have focused on extracting this information based on the points on the pitch. But, that led to insufficient data for projecting 3D points which can be located outside of the pitch. In this thesis, in the preprocessing stage of the first... 

Cars with high center of gravity, such as SUV-Sport Utility Vehicles- have high tendency to roll over in high speeds and rapid maneuvers. An idea formerly proposed is to use a high speed rotating disc like a gyroscope on the onset of the rollover to exert a high stabilizing moment on the vehicle, and consequently prevent rollovers. Also using two counter rotating discs with opposite nutation will prevent interference with the car other degrees of freedom. To reduce the interference of the spinning discs with the vehicle dynamics, the discs are to be brought to speed by the action of a high accelerating mechanism during the rollover process(similar to the action of an airbag). This project... 

Sports scheduling with its interesting theory and application has been the subject of many research recently. Different problems arise from different league structures with different objectives. Inspired by the structure of soccer leagues in Britain and Netherlands, we study structures in which a different permutation of first half-season rounds is played during second half-season. Some leagues like Premier league in addition to this structure have a special property in which two teams may do not play against each other in the first half-season and play twice in the second half-season. Therefore, we study both structures separately. We present a mathematical model to cover both structures.... 

Computer video games have had a huge growth in recent years, and Dota 2 is one of the most popular video games and e-sports right now. In this research, Dota 2 drafting phase is studied by using stochastic processes and probabilistic models. This phase is modeled as a POMDP (Partially Observable Markov Decision Process) for the first time. Afterwards, the model is solved using data mining methods and machine learning algorithms. A large database of the game's match data is created, and six different machine learning algorithms are used to predict the match outcome based on the drafting stage. The prediction accuracy and power of these algorithms is compared, and finally, a program is... 

Finding a proper and fair schedule for sport competitions has been an important issue, especially these days which professional sports has became a large scale business and profitability of sport competitions depends on the quality of the schedule.
Hence in the last three decades sport scheduling has been considered by computer science and operation research scientists.
Professional soccer league consists of many teams which compete in one round or double round robin tournament every year. In round robin tournaments each team has two matches, one at their own place and the other one at the competitors place. The main issues of the sport scheduling are the round and the host of... 

Effective tracking and re-identification of persons is essential for analyzing team sport videos. However, this task is challenging due to the nonlinear motion of players, the similarity in appearance of players from the same team, the distance of the camera from the persons on the pitch, and frequent occlusions. Therefore, the ability to extract meaningful embeddings to represent persons is crucial in developing an effective tracking and re-identification system. In team sports, there is other information that can be used for re-identification of persons, such as team affiliation, role information, and jersey number. However, existing methods usually suffer from two problems: first,...