On the task assignment with group fairness for spatial crowdsourcing     

《Information processing & management》2023,60(2):103175

Task assignment, the core problem of Spatial Crowdsourcing (SC), is often modeled as an optimization problem with multiple constraints, and the quality and efficiency of its solution determines how well the SC system works. Fairness is a critical aspect of task assignment that affects worker participation and satisfaction. Although the existing studies on SC have noticed the fairness problem, they mainly focus on fairness at the individual level rather than at the group level. However, differences among groups in certain attributes (e.g. race, gender, age) can easily lead to discrimination in task assignment, which triggers ethical issues and even deteriorates the quality of the SC system. Therefore, we study the problem of task assignment with group fairness for SC. According to the principle of fair budget allocation, we define a well-designed constraint that can be considered in the task assignment problem of SC systems, resulting in assignment with group fairness. We mainly consider the task assignment problem in a common One-to-One SC system (O2-SC), and our goal is to maximize the quality of the task assignment while satisfying group fairness and other constraints such as budget and spatial constraints. Specifically, we first give the formal definition of task assignment with group fairness constraint for O2-SC. Then, we prove that it is essentially an NP-hard combinatorial optimization problem. Next, we provide a novel fast algorithm with theoretical guarantees to solve it. Finally, we conduct extensive experiments using both synthetic and real datasets. The experimental results show that the proposed constraint can significantly improve the group fairness level of algorithms, even for a completely random algorithm. The results also show that our algorithm can efficiently and effectively complete the task assignment of SC systems while ensuring group fairness.  相似文献   

我国科技论文产出和时空演化初步探究     

郭雨辰 《科技管理研究》2017,(2)

为更完整地刻画中国大陆地区科学重心的时空演化格局,将地理学、统计学和科学计量学的方法应用于我国科技论文的研究,从空间角度定量研究我国科学产出的时空演化路径和空间分布特征,得出促进我国科学技术均衡发展的若干政策启示。  相似文献   

基于PVAR模型的长江中游城市群新型城镇化与科技创新关联性分析     

张建清  边娜  范斐 《科技管理研究》2017,(16)

基于2005—2014年长江中游城市群28个城市的面板数据,运用PVAR模型对新型城镇化与科技创新间的关联性进行估计,结果显示:科技创新有助于新型城镇化的发展,且近期的科技创新对新型城镇化的影响程度为正,较远期的科技创新会对新型城镇化的发展产生反向效果;新型城镇化的发展有利于科技创新,远期影响为正,中期影响效应变为负,近期又会由负转正。即科技创新与新型城镇化之间的动态关联关系具有时滞性,前期两者之间的互动效应为负,随时间的推移两者之间的影响由负转正;且新型城镇化对科技创新的影响效应强于科技创新对新型城镇化的影响效应,两者的互动关系存在较强的区域差异性。  相似文献   

“十三五”时期浙江省制造业主导产业选择研究     

刘铠维 《科技管理研究》2017,(5)

为有效区分产业部门区域优势、区域竞争力与区域结构优势,本文运用改进后的动态偏离-份额分析Esteban空间模型,构建了一种选择区域主导产业的新基准。随后利用浙江省“十二五”时期数据,进行了空间自相关检验与三维空间图分析,验证了“十三五”时期浙江省应大力发展动漫、新闻出版、文体用品制造业,时尚服装服饰业,时尚皮革制造业,时尚家居用品业,新能源汽车及电池产业,航空和轨道交通、高端船舶与海工装备产业,新材料产业。  相似文献   

欠发达地区乡村空间重构及规划策略——以安徽省池州市为例     

陈晓华  章莉莉 《池州师专学报》2009,(6)

随着城市化进入加速时期,旨在解决三农问题的乡村空间重构和规划是当今中国必须面对和亟待解决的现实课题。欠发达地区乡村社会转型滞后、小城镇空间集聚功能弱、村庄空废化等问题凸显。社会主义新农村建设为乡村空间重构提供了契机,乡村空间重构是新农村建设的现实路径选择。城乡统筹规划是乡村空间重构的立足点,整合重点城镇发展空间是乡村空间重构规划的关键,整治村庄生产与生活空间是乡村空间重构规划的重点,改造传统农业是乡村空间重构规划的重要内容。  相似文献   

Individual differences in spatial text processing: High spatial ability can compensate for spatial working memory interference     

Chiara Meneghetti  Valrie Gyselinck  Francesca Pazzaglia  Rossana De Beni 《Learning and individual differences》2009,19(4):577-589

The present study investigates the relation between spatial ability and visuo-spatial and verbal working memory in spatial text processing. In two experiments, participants listened to a spatial text (Experiments 1 and 2) and a non-spatial text (Experiment 1), at the same time performing a spatial or a verbal concurrent task, or no secondary task. To understand how individuals who differ in spatial ability process spatial text during dual task performance, spatial individual differences were analyzed. The tasks administered were the Vandenberg and Kuse [Vandenberg, S. G., & Kuse, A. R. (1978). Mental rotation, a group test of three-dimensional spatial visualization. Perceptual and Motor Skills, 47, 599-604.] mental rotation test (MRT) and a reading comprehension task (RCT). Individuals with high (HMR) and low (LMR) mental rotation differed in MRT scores but had similar RCT performance. Results showed that the HMR group, in contrast with LMR counterparts, preserved good spatial text recall even when a spatial concurrent task was performed; however, Experiment 2 revealed a modification of spatial concurrent task performance in LMR as well in HMR group. Overall, results suggest that HMR individuals have more spatial resources than LMR individuals, allowing them to compensate for spatial working memory interference, but only to a limited extent, given that the processing of spatial information is still mediated by VSWM.  相似文献   

中原经济区城镇居民消费间接碳排放时空格局及其影响因素     

史琴琴  鲁丰先  陈海  张丽君  武荣伟  梁小英 《资源科学》2018,40(6):1297-1306

从消费视角研究城镇居民消费间接碳排放的历史增长、空间分异规律及影响因素,对发展低碳城市和居民合理消费方式的形成具有重要的意义。本文以中原经济区为例,运用投入产出法测算2002—2014年城镇居民消费间接碳排放,通过空间自相关和空间面板模型分析其空间关联特征及影响因素,得到以下结论：①2002—2014年,城镇居民消费间接碳排放呈波动上升的趋势,“衣、食、住”等生存型消费碳排放增长速度较快,“交通、教育娱乐、医疗保健”等发展型消费碳排放增长速度较慢;②从空间关联格局来看,城镇居民消费人均碳排放以HH区和LL区的空间正相关类型为主;③空间杜宾模型估计结果表明,居民收入水平、产业结构和消费结构是影响该区城镇居民消费间接碳排放的主要因素,另外,消费结构和消费意识两个因素具有明显的空间溢出效应。  相似文献   

基于C8051F005的光外调制器控制系统设计     

唐鑫凌 《湖南科技学院学报》2009,30(4)

设计了一个PC机与单片机联合工作以控制光幅度调制的自动控制系统,对系统结构、原理等进行了分析.本系统硬件由两大模块组成:光路模块和电路模块.光路模块的功能是实现电光信号的转换和检测.电路模块则用于对光路模块偏置电压偏移进行测控调整,使幅度调制稳定,也是光外调制器的核心设计模块.  相似文献   

Wall sheeting diagnosis in fluidized beds based on chaos analysis of acoustic emission signals     

Yi-jia Cao  Jing-dai Wang  Wei Liu  Yong-rong Yang 《浙江大学学报(A卷英文版)》2009,10(9):1341-1349

A novel method, based on acoustic emission （AE） techniques, for detecting agglomeration in fluidized beds is presented. Particle size characteristics are determined based on the principle that AE signals with different frequency band energies are emitted when particles of different sizes impact an internal wall. By applying chaotic analysis to the AE signals, the malfunction coefficients are well defined. Agglomeration in the fluidized bed can then be detected by the sudden variation of malfunction coefficients. AE signals were investigated in a laboratory scale heated fluidized bed and an industrial polyethylene flu- idized bed. Experimental data showed that the malfunction coefficients increased with the growth of agglomeration. The results indicated that agglomeration in fluidized beds can be predicted and diagnosed effectively and precisely using AE techniques based on chaotic analysis.  相似文献   

基于GIS的安阳旅游地理信息系统研究     

闫琰  储泽楠 《教育技术导刊》2009,19(8):109-111

以旅游地理信息系统在旅游业中的强大功能及广泛应用为出发点,阐述了安阳旅游地理信息系统的设计过程,以及围绕以旅游信息为主题的地理信息系统的相关研究和探索。  相似文献