نتایج جستجو برای: rail lines
تعداد نتایج: 226588 فیلتر نتایج به سال:
The European Rail Train Management System (ERTMS) developed by the European industry represents a de-facto standard widely accepted in the world for signaling and speed-control applications. Whilst ERTMS has demonstrated its advantages as a cost-efficient train control system for high-speed lines and main corridors, the next challenge is to fulfill the emerging demand of low traffic lines for w...
One of the basic problems in strategic planning of public and rail transport is the line planning problem to find a system of lines and its associated frequencies. The objectives of this planning process are usually manifold and often contradicting. The transport operator wants to minimize cost, whereas passengers want to have travel time shortest routes without any or only few changings betwee...
In the United States, railways are the major means to trans-continentally move goods from ports to the various inland destinations. Due to mergers and abandonment of rail lines, there has been a reduction in the track capacity, concentrating rail traffic to fewer lines. In addition to this, booming trade with Pacific Rim nations has seen the annual trade in the Ports of Los Angeles and Long Bea...
The article discusses the issues of building intelligent receivers pulsed signals with an unknown arrival time without restrictions on value signal-to-noise ratio under influence a complex interfering factors. Using recurrent methods for detecting disturbances random processes and algorithm cumulative sums, problem synthesizing algorithms Markov moments appearance against background various com...
Broken rails are the most common cause of severe freighttrain derailments on American railroads. Reducing the occurrence of broken-rail-caused derailments is an important safety objective for the railroad industry. The current practice is to periodically inspect rails using non-destructive technologies such as ultrasonic inspection. Determining the optimal rail defect inspection frequency is a ...
Running rails used as a return conductor and ungrounded scheme have been widely adopted in DC traction power systems. Due to the longitudinal resistance of running rails and insulation resistance of rail-to-ground, there will be a potential rise between running rails and the ground when return current flows through the running rails, which is known as rail potential. At present, abnormal rise o...
This report evaluates rail transit benefits based on a comprehensive analysis of urban transportation system performance in major U.S. cities. It discusses best practices for evaluating transit benefits. It finds that cities with larger, well-established rail systems have significantly higher per capita transit ridership, lower average per capita vehicle ownership and mileage, less traffic cong...
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