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中国城市青少年体质健康型人居实体环境评估指标体系 被引量:2
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作者 何晓龙 漏凯浩 +3 位作者 王一超 李晓峰 吕时珍 吴立伟 《浙江师范大学学报(自然科学版)》 CAS 2019年第1期96-103,共8页
为研制适合国内青少年体质健康型人居实体环境评估指标体系,在借鉴国内外城市青少年体质健康型人居实体环境研究现状制定评估指标体系初稿的基础上,应用标准Delphi法进行指标定性和定量筛选,最后应用层次分析(AHP)法进行指标权重赋值.... 为研制适合国内青少年体质健康型人居实体环境评估指标体系,在借鉴国内外城市青少年体质健康型人居实体环境研究现状制定评估指标体系初稿的基础上,应用标准Delphi法进行指标定性和定量筛选,最后应用层次分析(AHP)法进行指标权重赋值.结果表明:最终的指标体系涵盖2个一级指标,10个二级指标和27个可供具体操作定义的三级指标.研究结果可为今后国内该领域研究中的实体环境定性测量提供指标体系框架和内容效度,但具体应用还需进行语句表达(操作定义)和重测信度、结构效度的检验;也可作为实体环境定量测量的指标框架和评估总分的计算依据. 展开更多
关键词 建成环境 身体活动 食物环境 层次分析法 权重
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Maximum-Profit Advertising Strategy Using Crowdsensing Trajectory Data
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作者 lou kaihao YANG Yongjian +1 位作者 YANG Funing ZHANG Xingliang 《ZTE Communications》 2021年第2期29-43,共15页
Out-door billboard advertising plays an important role in attracting potential customers.However,whether a customer can be attracted is influenced by many factors,such as the probability that he/she sees the billboard... Out-door billboard advertising plays an important role in attracting potential customers.However,whether a customer can be attracted is influenced by many factors,such as the probability that he/she sees the billboard,the degree of his/her interest,and the detour distance for buying the product.Taking the above factors into account,we propose advertising strategies for selecting an effective set of billboards under the advertising budget to maximize commercial profit.By using the data collected by Mobile Crowdsensing(MCS),we extract potential customers’implicit information,such as their trajectories and preferences.We then study the billboard selection problem under two situations,where the advertiser may have only one or multiple products.When only one kind of product needs advertising,the billboard selection problem is formulated as the probabilistic set coverage problem.We propose two heuristic advertising strategies to greedily select advertising billboards,which achieves the expected maximum commercial profit with the lowest cost.When the advertiser has multiple products,we formulate the problem as searching for an optimal solution and adopt the simulated annealing algorithm to search for global optimum instead of local optimum.Extensive experiments based on three real-world data sets verify that our proposed advertising strategies can achieve the superior commercial profit compared with the state-of-the-art strategies. 展开更多
关键词 billboard advertising mobile Crowdsensing probabilistic set coverage problem simulated annealing optimization problem
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