arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 2409.03545cs.LGcs.DS
收藏

第二次机会的力量:具有两个候选解的个性化子模最大化

The Power of Second Chance: Personalized Submodular Maximization with Two Candidates

University of North Texas(北得克萨斯大学);University at Buffalo(布法罗大学)

Jing Yuan, Shaojie Tang

AI总结:

本文提出具有两个候选解的个性化子模最大化问题,以每个用户函数在两个候选解中的较优值作为效用,并设计有效算法,同时讨论推广到多个候选解以增强灵活性与个性化。

摘要:

现有关于子模最大化的研究大多集中于选择一个子集以最大化单一子模函数。然而,在许多现实场景中,我们可能面对多个用户特定的函数,每个函数刻画某一类用户的效用。在这些设定下,我们的目标是选择一组在所有用户特定函数上都表现良好的项目。解决该问题的一种方式是选择单个子集以最大化所有用户特定函数之和。尽管这种聚合方法在避免为各个函数分别计算集合方面是高效的,但它确实错失了个性化的力量——因为它不允许为不同函数选择不同集合。本文引入了具有两个候选解的个性化子模最大化问题。对于任意两个候选解,每个用户特定函数的效用被定义为这两个候选解中较好的那个。因此,我们的目标是选择最佳的两个候选解集合,以最大化所有用户特定函数的效用之和。我们为这一问题设计了有效算法。我们还讨论了我们的方法如何推广到多个候选解,从而提升解的灵活性和个性化程度。

英文摘要:

Most of existing studies on submodular maximization focus on selecting a subset of items that maximizes a \emph{single} submodular function. However, in many real-world scenarios, we might have multiple user-specific functions, each of which models the utility of a particular type of user. In these settings, our goal would be to choose a set of items that performs well across all the user-specific functions. One way to tackle this problem is to select a single subset that maximizes the sum of all of the user-specific functions. Although this aggregate approach is efficient in the sense that it avoids computation of sets for individual functions, it really misses the power of personalization - for it does not allow to choose different sets for different functions. In this paper, we introduce the problem of personalized submodular maximization with two candidate solutions. For any two candidate solutions, the utility of each user-specific function is defined as the better of these two candidates. Our objective is, therefore, to select the best set of two candidates that maximize the sum of utilities of all the user-specific functions. We have designed effective algorithms for this problem. We also discuss how our approach generalizes to multiple candidate solutions, increasing flexibility and personalization in our solution.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑