Titlebook: ;

贊美者

Flows in Networks: Basic Model,oad system, trains through a railway network, messages through a communication network, fluids through pipes, electricity through an electrical circuit, people through customs at a large airport, jobs capable of being produced on different machines through their production sequence. There is usually

混合,攙雜

路標

effrontery

https://doi.org/10.1057/9780230292321iven word being used to convey more than one concept. It is with the basic definitions that the situation is worst and in order to provide a sound framework, formal definitions of some of the more fundamental concepts will be given in the following sections. The terminology to be used will generally follow that of Berge (1962) and Kaufmann (1967).

Rct393

Introduction,on . of a real continuous variable x where . Figure 1.1b also shows a graph, this time of . In both cases x can take on a (continuous) infinity of values and the graph consists of continuous lines containing an infinite number of points.

令人發(fā)膩

indecipherable

d-limonene

SENT

Location Problems,Situations in which a physical object, or objects, have to be located are of very frequent occurrence. The objects in question will be called .. A variety of factors have to be taken into account in location problems but a very commonly occurring one is that of ‘a(chǎn)ccessibility’, and this will be the feature of special interest in this chapter.

彈藥