نتایج جستجو برای: axles truck
تعداد نتایج: 5185 فیلتر نتایج به سال:
Technology has changed trucks significantly over the years. As a result, consumer expectations, in terms of performance, have risen. In Western society, the comfort of products has developed into an important issue. Truck manufacturers recognize comfort as one of the major selling point, as it is thought to play an important role for buyers as well. In addition, employers are getting interested...
OBJECTIVES The present study aimed to investigate the illicit drug use patterns of long-distance truck drivers. This population is considered to be a special interest group in terms of drug-driving research and policy due to high rates of use, involvement of drugs in truck accidents, and the link between drug use and work-related fatigue. METHODS Qualitative interview data were collected from...
Background and aims Driving is a dangerous and difficult job. In proportion to the other occupational groups, driving has a higher rate of mortality, morbidity and absent due to illness. Drivers are susceptible to depression. Depression alters the thought, attitude and operational skills and leads to higher rates of accident. The aim of this study was to determine the prevalence of depress...
In this study, we consider the application of a simulated annealing (SA) heuristic to the truck and trailer routing problem with time windows (TTRPTW), an extension of the truck and trailer routing problem (TTRP). TTRP is a variant of the well-known well-studied vehicle routing problem (VRP). In TTRP, some customers can be serviced by either a complete vehicle (that is, a truck pulling a traile...
An algorithm for real time estimation of truck traffic in multi-lane freeway is proposed. The algorithm uses data from single loop detectors—the most widely installed surveillance technology for urban freeways in the US. The algorithm works for those freeway locations that have a truck-free lane, and exhibit high lane-to-lane speed correlation. These conditions are met by most urban freeway loc...
Truck and shovel operations comprise approximately 60% of the total operating costs in open pit mines. In order to increase productivity and reduce the cost of mining operations, it is essential to manage the equipment used with high efficiency. In this work, the chance-constrained goal programing (CCGP) model presented by Michalakopoulos and Panagiotou is developed to determine an optimal truc...
Field tests using an instrumented powered wheelset were performed to investigate fatigue damage accumulation in railway axles. Axle bending strains measured and post-processed obtain axle stress spectra. Statistical analyses used the variations of spectra due changes operation parameters. The study indicates that can be modeled truncated normal distributions, where large majority amplitudes are...
Comfort is an attribute that today’s drivers demand more and more. Seat is one of the important features of vehicle and there is the place where the professional driver spends most of their time. According to ‘European Union Legislation for Drivers and Promote’, the weekly driving time for truck drivers shall not exceed 56 hours. Assuming eight week vacation and one more for holiday, the truck ...
An important problem for forestry in-field chipping operations is the efficient daily truck transportation of chips from different coupes being harvested, with known supplies, to customer destinations with known daily demands. This paper presents initial results from a trial with FastTRUCK, a software tool that uses a simulated annealing approach to optimise truck schedules. The software was de...
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