On thoughtfulness and generosity in sequential decisions

In this article, we develop frameworks to study the notions of thoughtfulness and generosity in sequential choice situations involving two individuals. In such situations, by taking particular actions, an individual (the first mover) can induce various sets of alternatives to be available for the other individual (the second mover) to choose from. We view those sets of alternatives as opportunity sets reflecting degrees of thoughtfulness or generosity exhibited by the first mover toward the second mover. We axiomatically study several specific rules for ranking opportunity sets in terms of either thoughtfulness or generosity.     

An assessment of soil nematode food webs and nutrient pools in community gardens and vacant lots in two post-industrial American cities

In the midst of the current economic crisis, there is renewed interest in transforming vacant lots into food-producing gardens. This study analyzed whether vacant lots are suitable for food production, by comparing the soil nematode food webs and nutrient pools of vacant lots and community gardens in two post-industrial U.S. cities, Akron and Cleveland, Ohio. Twelve vacant lots and 12 community gardens were examined in the two cities. All six Akron community gardens were established just prior to the initiation of this study, whereas the six in Cleveland were 15–30 years old. Soil pH, texture, moisture, organic matter, mineral nitrogen content, microbial biomass, and nematode communities were measured in both cities. Soil decomposition rate was also measured in Cleveland. Results show that the soils of vacant lots surpassed those of the newly-established Akron gardens and were equal to the soils of the well-established Cleveland gardens in the amount of ammonium-nitrogen, total nematode population, genus diversity, and maturity and structure indices. The soils of the vacant lots were lower than the community gardens in the amounts of soil moisture, organic matter, and nitrate-nitrogen, which we associate with the addition of water, compost, fertilizer, and tilling in the gardens. No significant difference was found between community gardens and vacant lots in microbial biomass, decomposition rate, or nematode enrichment index, which seems to indicate that vacant lots are equal to community gardens in nutrient availability and nutrient cycling. We conclude that barring any contamination, the soil in vacant lots maybe suitable for the establishment of food gardens, which can provide many desirable ecosystem services and enhance human well-being. We also find that the disturbance associated with tillage and conversion of a vacant lot into a community garden has short-term ramifications for both nematode food webs and mineral-nitrogen content.     

城市群的空间构成要素及其功能培育

城市群有群核、群集和群网三大空间构成要素,优化城市群的空间结构,促进我国城市群的健康发展,必须培育三大空间构成要素的作用功能。     

轨道交通建设对苏州商业空间结构的影响研究

文章通过分析苏州商业空间的演变历程和轨道交通建设对苏州商业空间发展可能带来的影响,阐述了未来苏州商业空间结构将经历点状扩散、带形发展、连接成片三个阶段的演变趋势,并提出了苏州建设有序商业空间结构的具体策略,为苏州轨道交通与商业空间建设提供理论依据和决策参考。     

基本权利理论视阈中的劳动权规范领域

确定劳动权的规范领域是劳动权保障的先决条件,只有规范领域内的劳动权才受保障.劳动权规范领域与劳动权保障程度密切相关,规范领域越广,国家侵害的可能性就越大;规范领域越窄,国家侵害的可能性就越小.劳动权规范领域的确定需借助宪法诉讼、宪法解释,中国语境下宪法解释更具意义,在策略上宜实行“分层的二元解释”,对自由权层面的劳动权实行“扩张解释”,对社会权层面的劳动权实行“限缩解释”.具体而言,“对人的主观规范领域”和“对行为与内容的客观规范领域”共同构筑了完整的劳动权规范领域.     

新型PET瓶盖杀菌系统的研究与开发

PET瓶超净及无菌灌装技术已成为饮料行业的发展趋势。目前在PET生产线上对瓶盖的杀菌方式主要有紫外线杀菌、倒瓶热力杀菌、化学药剂杀菌等,都存在着杀菌不彻底或者收集处理困难以及成本高等问题。在研究各类杀菌方式、特点的基础上,文章提出了通过过氧化氢喷雾+无菌热空气激发+高强度紫外线结合杀菌的理论,开发一种杀菌彻底,残留少的新型PET瓶盖在线杀菌系统。     

常州城市宣传标语的文化语用学解析

宣传标语对展现城市特色,推广城市资源和文化起着重要的作用。文章从文化语用学的角度对常州的城市宣传标语所展示的语用文化进行分析,讨论常州城市宣传标语中存在的语用失误现象,并提倡使用得体、准确、文明的宣传标语。     

对雇主品牌要素构成问题的实证分析——基于高校应届毕业生对理想雇主的期望调查

本研究以国内高校学生（即潜在员工）为切入口,考察雇主品牌要素结构。通过自行编制问卷调查了来自上海、北京等地的200名本科学生,探索性因素分析及验证性因素分析的结果显示,高校学生所期望的雇主品牌要素呈现4因子结构,分别是福利保障、制度文化、公共形象、直复传播。进一步描述了基于人口统计学信息的雇主品牌要素期望差异,并进行了解释。     

山东济南华阳宫三皇殿壁画病害调查及修复研究

华阳宫古建筑群是济南地区规模最大的古建筑群体,同时保存有300多平方米古代壁画.三皇殿是华阳宫的主要建筑之一,殿内遗存清代精美壁画,然而历经文革以及后期人为破坏,绝大部分被白色灰浆覆盖,长期不为世人知晓.分析三皇殿壁画病害及其成因,提出对壁画病害的治理及防治措施,以期为类似壁画修复提供借鉴.     

利用频变地震反射系数识别含气储层

地震波在孔隙介质中传播的渐进方程可用于在地震频带内计算法向入射反射系数,这个频变的反射系数可用一个无量纲的参数ε 来表示,ε 可表示为储层流动性参数（即粘滞性的倒数）、流体密度和信号频率的乘积。利用该表达式,对中国新场气田的实际数据进行了计算,新场气田的储层大多为超致密的砂岩并且渗透率很低。在计算结果上观测到了砂岩储层内过渡区的气水界面上反射系数在地震频带内随频率变化的现象。利用该研究结果指导了地震反演并提取了相应的地震属性,这些属性被首先用于进行的流体（气或水）辨别,最后,在此基础上进行了含气和含水储层的识别。