The features of the control systems temperature traction frequency converters consisted rectifier, capacitor and voltage source inverter for rolling stock are discussed. induction motor is considered as a load converter. dependence number thermal cycles from semiconductor junction fluctuations before failure device shown. topology operation principle automatic system devices converter developed...

This paper describes studies done at Gemtex Laboratory on the modeling and simulation of woven fabric. The main difficulty in this area is to take into account the hysteresis phenomena that occurs in fabric’s traction, shearing and bending behavior. Part I of this paper presents a friction based approach to obtain a time-free model for this nonlinear phenomena. Part II presents the application ...

An optimization-based estimation method is presented for determining mode transition times and model parameters for hybrid systems. Firstand second-order optimality conditions are derived, including cross-derivative terms between transition times and parameters. Second-order optimization methods are shown to provide superior convergence to correct values in simulation, and to values within expe...

In the modern age, our ability to generate large data sets far outpaces our capacity for analyzing them. Google’s proposed solution to this fundamental problem – the MapReduce paradigm and runtime system – has recently gained traction in the scientific and “big data” industries. However, the performance characteristics of MapReduce are not well known. This paper builds on the e↵orts of prior re...

In the design of a network control system (NCS), both temporal and functional behaviors of an NCS should be considered in order to meet the desired performance. In conventional approaches for NCS design, the control performance cannot be evaluated precisely during the design phase since temporal behaviors of the NCS are not taken into account. In this paper, we proposed a formalized design proc...

PURPOSE Football is the most popular high school sport; however, it has the highest rate of injury. Speculation has been prevalent that foot fixation due to high footwear traction contributes to injury risk. Therefore, the purpose of the study was to determine whether a relationship exists between the athlete's specific footwear traction (measured with their own shoes on the field of play) and ...

Traction performance tests were run by Alberta Farm Machinery Research Centre personnel on fourwheel drive tractors with single, dual and triple rubber tires and on track tractors with two and four rubber belt tracks. Traction power delivery efficiency was compared in various tilled and untilled soil conditions representative of the Northern Great Plains. Various ballast set-ups and tire inflat...