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The joint distribution mode has become a new optimization mode of distribution at present, this paper considered the carbon emission and customer urgency in the joint distribution vehicle scheduling optimization. Carbon emission calculation was based on speed and speed became decision variable. Customer urgency was defined according to the relaxability of time window. A mixed integer programming model...
In the tractor-and-trailer transportation system, empty trailers always need to be dispatched insides owing to their same nature and uneven distribution of cargoes. Hence, they are also scheduling objects, as well as laden trailers. Compared with laden-trailer tasks whose origin and destination (OD) are clear, we can only know overall empty trailers' supply and demand, while specific OD are uncertain...
This issues Measurements Corner article presents detailed descriptions of two novel geometric optics methods for the analysis and design of anechoic chambers. The advantages and limitations of each technique are compared and contrasted, and methods for their efficient implementation are discussed.
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