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641.
H. P. Y. Hitch 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》1981,10(4):319-332
The state-of-the-art in analysing a number of ground manoeuvring processes on aircraft is described. The mathematical models are as good as the data supplied to them. 相似文献
642.
643.
Decentralization is a major theme of organizational change in shipping. It is often seen as 'putting power back aboard ship'. However, the authors argue that this view is too simple. Decentralization poses fundamental questions about the entire management structure of the shipping company. The redistribution of authority necessary for decentralization is discussed in terms of the company organization structure. 相似文献
644.
645.
The authors of this paper make use of computer simulation techniques as a means of investigating the problems associated with minimizing a ship's turn-round time. 相似文献
646.
J. David Diltz 《Transportation》1982,11(3):217-233
A sample of 1000 households completed a questionnaire regarding difficulties encountered purchasing gasoline during the week 4–10 June 1979 and whether difficulties encountered purchasing gasoline affected household automobile tripmaking. Results of this survey were analyzed and it was found that the frequency of reporting purchasing difficulties varied directly with household income and inversely with the age of the household. The frequency of reporting that purchasing difficulties affected automobile trip-making varied directly with household income and inversely with the number of adults in the household. Further, although individual household response was highly sensitive to socioeconomic characteristics, the overall response to the survey would not have differed significantly had the socioeconomic mix of households been different. 相似文献
647.
The Available Methods to Calculate the Wheel/Rail Forces in Non Hertzian Contact Patches and Rail Damaging 总被引:2,自引:0,他引:2
J.P. Pascal G. Sauvage 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》1993,22(3):263-275
In the present paper, the methods used in railway dynamics to take into account the non Hertzian multi contact patches occurring on a wheel, are summarised. Some application cases are presented as well as an explanation of the so called “squat” rail deterioration. 相似文献
648.
Testing and Analysis Techniques for Safety Assessment of Rail Vehicles: The State-of-the-Art 总被引:1,自引:0,他引:1
J.A. Elkins A. Carter 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》1993,22(3):185-208
The methods currently being used in North America, Britain and Europe for the safety assessment of rail vehicles are discussed. There is considerable disparity between the methods that have been developed in the different countries. These differences, and the possible reasons for them, are discussed in the paper. Finally, conclusions are drawn and some recommendations are made for the future direction of safety assessment methods. 相似文献
649.
S. Motoyama Engineer H. Uki Engineer K. ISODA Manager H. YUASA Manager 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》1993,22(5):455-464
The purpose of this study is to clarify vehicle dynamics effected by traction force distribution, not only between the front and rear wheels but also between the left and right wheels. Contribution of traction force distribution to vehicle turning performance was investigated using a mathematical simulation and an experimental vehicle. The results indicates that the control of traction control distribution between the left and right wheels greatly influences vehicle turning characteristics and improve the performance even in a marginal turning condition. 相似文献
650.