例句與造句

1. The bidders'valuations are arbitrary submodular set functions ( note that additive and unit-demand are special cases of submodular ).
2. Some techniques and algorithms which naturally model summarization problems are TextRank and PageRank, Submodular set function, Determinantal point process, maximal marginal relevance ( MMR ) etc.
3. For example, when the cost function is a submodular set function ( as in the above example ), the correlation gap is at most e / ( e-1 ) ( so the above example is a worst-case ).
4. The rank functions of matroids form an important subclass of the submodular set functions, and the rank functions of the matroids defined from certain other types of mathematical object such as undirected graphs, matrices, and field extensions are important within the study of those objects.
5. It's difficult to find submodular set function in a sentence. 用submodular set function造句挺難的