基于ARMA模型的河北省城乡居民信息消费差距分析

利用ARMA模型分析河北省城乡居民信息消费差距。研究结果表明,城乡居民信息消费倾向差距有先增后减的趋势;信息消费系数持续稳定增加,但差距依然存在;信息消费差距逐渐增大,2015年有缩小的趋势。因此应该更加关注农村居民信息消费,进一步提高农村居民收入、加强农村信息基础设施建设、提高农村居民文化水平和消费意识。     

校园空气负氧离子浓度分布与空气质量评价

空气负氧离子浓度水平不仅反映了空气质量,还直接影响人们的舒适程度和健康状况。研究武夷学院空气负氧离子浓度含量发现,其受人类活动力度、海拔高度、空气流通状况、动态水体和植被分布等综合因素影响,并具有明显的气象变化和日变化特征。负氧离子浓度含量排序为:暴雨天>小雨天>雨后阴天>晴天;一日中上午>傍晚>中午。测量结果表明该校园整体空气质量等级达到四级或者三级,空气清新,有利于师生健康。     

Indoor air quality risk assessment on the Canadian campus by a multilevel integrated weighted average method

Increasing incidents of indoor air quality (IAQ) related complaints lead us to the fact that IAQ has become a significant occupational health and environmental issue. However, how to effectively evaluate IAQ under different scale of multiple indicators is still a challenge. The traditional single-indicator method is subjected to uncertainties in assessing IAQ due to different subjectivity on good or bad quality and scalar differences of data set. In this study, a multilevel integrated weighted average IAQ method including initial walking through assessment (IWA) and two-layers weighted average method are developed and applied to evaluate IAQ of the laboratory building at the University of Regina in Canada. Some important chemical parameters related to IAQ in terms of volatile organic compounds (VOCs), methanol (HCHO), carbon dioxide (CO2), and carbon monoxide (CO) are evaluated based on 5 months continuous monitoring data. The new integrated assessment result can not only indicates the risk of an individual parameter, but also able to quantify the overall IAQ risk on the sampling site. Finally, some recommendations based on the result are proposed to address sustainable IAQ practices in the sampling area.     

我国航空运输业产业关联效应研究

我国航空运输业发展相对滞后,研究我国航空运输业的产业关联差异,为我国航空运输业发展滞后地区提供理论依据。以投入产出表为基础,构建投入产出模型,分析航空运输产业关联和波及效应。对比计算结果发现:我国航空运输业后向关联集中度较高,内部关联效应较强;与第三产业的关联效应有待加强;我国航空运输业对经济发展的推动力较弱,拉动效应明显。发展滞后地区应特别注重加强航空运输业与国民经济中第三产业的关联效应。     

全铝高效空调换热器的研究与应用

通过对4种不同类型的铝制换热器进行性能测试,选出最优的N型2次内螺纹铝管制作空调蒸发器与冷凝器并对其流路进行优化,整机性能测试结果表明采用铝制翅片式换热器可以满足制冷性能的要求,空调管路系统采用铝是可行的。     

浅谈我国收入差距现状、原因及对策

随着我国经济的增长,收入不均呈扩大化趋势。收入不均自然导致贫富分化,这势必会成为社会的不安定因素。如何调节居民收入分配,缩小居民收入差距,成为亟待解决的问题。通过论述我国收入差距的现状,分析了差距形成的市场化因素、非市场化因素、经济增长结构因素、初次分配和再分配因素等原因,并在此基础上提出了相应的对策,以期对这一问题的解决起到一定的作用。     

基于模糊控制的智能变频空调控制系统研究

通过神经网络和模糊控制技术的结合,实现了模糊神经网络控制器FNNC和神经网络预测器NNP的结构设计。该设计可以提高压缩机的控制精度,加强控制系统的适应性,实现压缩机的智能化。     

查士丁尼时代的拜占庭对贫富差距的制度调适

查士丁尼时代的拜占庭社会可以划分为三个阶层：以皇帝、高级教士、官僚贵族、富商等为代表的社会上层,以低级教士、中下级城市官员、士兵、普通工商业者等为代表的社会中层,和以隶农、自由农、自由佃农、奴隶以及城市中知识分子、卖艺人、妓女、无产者等为代表的社会下层。针对日益扩大的贫富差距,国家在政治、经济、法律、宗教等方面做出制度调适,取得了些许成果,也暴露出一些弊病,故在分析这一问题时应尽可能做到客观、公正。     

我国城乡居民收入差距分析

根据近年我国城乡居民收入的数据,运用相关分析方法分析我国城乡居民收入差距的现状。得出城镇居民人均可支配收入与农村人均可支配收入具有正相关的线性相关关系,且都具有增长趋势,但二者之间差距随时间越来越大。     

Gap year students in Lithuania: the value orientations of children from wealthy social groups

The paper seeks to understand the trajectories of students who defer entry to university. The study was conducted in Lithuania, a former Soviet Union republic. The phenomenon of a ‘gap year’ is usually associated with young people, who decide not to enter higher education schools immediately after receiving secondary education, instead they choose to spend a year volunteering, working or engaging in other activities. This article analyses the choice of taking a gap year from the perspective of rational choice theory, complemented by human development theory, which was developed by R. Inglehart and his colleagues. The latter theory allows discovering relation between the spreading of the gap year phenomenon in developed European countries and the emergence as well as development of post-materialist values from the macro-level perspective. The theoretical analysis is based on semi-structured interview data collected in Lithuania.