BIODEGRADABLE LUBRICANT FOR RAILWAY TRANSPORT

Vapor lubricant transport in MEMS devices

Vapor phase lubrication is considered one of the most likely means of lubricating MEMS devices with replenishable solid films. Since gas phase diffusion is the primary means of vapor lubricant transport into the long, narrow channels of MEMS devices, it is necessary to determine that this is sufficient to replenish lubricant films worn at high rates. The diffusion of vapor phase lubricant into ...

Classifying Railway Passenger Stations for Use Transport Planning – Application to Bulgarian Railway Network

A methodology for the classification of railway passenger stations was developed in this study. Four groups of factors are defined to study the characteristics of the station: potential of the town, importance of the town, infrastructural factors, and characteristics of passengers. In the research we investigated 18 factors and studied 98 passenger stations of railway network in Bulgaria. The m...

Solving Public Railway Transport Networks with SAT

SAT solvers have been already successfully applied in several industrial fields, which are not directly related to propositional logic. In this work, the periodic event scheduling problem (PESP) will be presented and, furthermore, the order encoding from a PESP instance to a SAT instance. The NP-complete PESP is particularly important in several traffic scenarios with periodic properties. Most ...

Tribological Characteristics of Calophyllum inophyllum–Based TMP (Trimethylolpropane) Ester as Energy-Saving and Biodegradable Lubricant

[Environment-induced human damages caused by railway transport].