参差质量工人环境中的众包任务全局分配模型  

Global Task Assignment Model for Crowdsourcing with Mixed-quality Worker Context

作　　者：蒋玖川 魏金鹏 张金伟 JIANG Jiuchuan;WEI Jinpeng;ZHANG Jinwei(School of Information Engineering,Nanjing University of Finance and Economics,Nanjing 210023,China)

机构地区：[1]南京财经大学信息工程学院,南京210023

出　　处：《计算机科学》2023年第S02期133-141,共9页Computer Science

基　　金：国家社会科学基金(22BGL261)。

摘　　要：已有的众包研究大多优先使用优秀工人来完成任务,即众包平台会为任务分配技能水平度和信誉度最高的工人。然而现实平台中大部分工人的技能水平度与信誉度相对较低,导致众包平台中同时存在大量无法分配的任务和无任务可做的工人。问题的主要原因如下:(1)复杂任务对工人技能水平度要求高,专业工人数量较少,而占大多数的技能水平度较低的工人无法完成复杂任务,使得大量任务分配失败;(2)任务会被优先分配给技能水平度高和信誉度高的工人,而技能水平度、信誉度相对较低的工人因为没有达到任务要求往往无任务可做。在实际众包平台中,我们发现很多复杂任务都有充足的预算,并且平台中的工人们可以通过合作来提升技能水平度。基于这些实际观察,设计了一个工人合作模型:当平台中缺少符合任务要求的工人时,该模型会让技能水平度不足的工人加入团队,通过团队内工人合作达到任务要求的技能水平度,从而使任务分配成功。最后在真实数据集上开展了实验,实验结果表明,所提模型能够提高任务分配成功率,并同时降低任务发布者的预算成本、提高工人的整体收入水平。Most existing crowdsourcing researches previously use top workers to complete tasks,i.e.,crowdsourcing platforms always assign workers with the highest skill levels and reputation to tasks.However,in reality,most of the workers have relatively low skill levels and reputation,resulting in a large number of unassignable tasks and workers without tasks to do in crowdsourcing platforms.The main reasons for the problem are as follows:(1)complex tasks have high skill level requirements and the number of professional workers is small,so workers with insufficient skill levels are unable to complete complex tasks,which causes a large number of tasks fail to be assigned;(2)tasks are priority assigned to workers with high skill levels and high reputation,while workers with relatively low skill levels and reputation are not available to be assigned because they cannot meet the task requirements.In the real crowdsourcing platform,we find that many complex tasks have sufficient budgets and workers can improve their skill levels through collaboration.On the basis of these practical observations,we design a worker collaboration model in this paper.When the platform lacks of workers who meet the task requirements,the model allows workers with inadequate skill levels to participate in the team and collaborate to achieve the task skill level requirements before being assigned the task.Finally,the experiments are carried out on a real dataset and the results show that the proposed model can improve the success rate of task assignment and also reduce the budget cost of requesters,increase the income of workers.

关 键 词：众包 复杂任务 任务分配 工人协作 技能水平度 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]