Sökning: "freight transportation activity"
Hittade 3 avhandlingar innehållade orden freight transportation activity.
1. Wavelet Analysis of Economic Time Series
Sammanfattning : Economic theory commonly distinguishes between different time horizons such as the short run and the long run. Models with many time horizons are easily studied in the frequency domain, because the various time horizons are associated with a particular frequency or band of frequencies. LÄS MER
2. The impact of railway vibration and noise on sleep
Sammanfattning : Sleep is a vital component of good health, and sleep loss is associated with impaired cognition, decreased psychomotor performance, cardiovascular disease, adverse effects on endocrine and metabolic function, negative mood, impaired memory, and more. A growing burden of freight transportation on global railway networks will likely lead to an increase in nocturnal vibration and noise at nearby dwellings. LÄS MER
3. Towards concurrent planning of railway maintenance and train services
Sammanfattning : Efficiency in the public and freight transportation systems is of crucial importance for a society. Railways can offer high capacity and relatively low environmental impact, but require that several technical systems are tuned and operate well. LÄS MER