苦卤资源综合利用研究进展

苦卤是在海盐生产的过程中排放的液体废料,其中富集大量的无机化合物。在总结我国苦卤资源开发利用现状的基础上,结合连云港银化制镁有限公司的实际,提出了应用循环经济理念开发我国苦卤资源及对苦卤资源进行高附加值产品开发研究的进展,在现有产业基础上提出形成苦卤资源开发的系列产业链,实现纵向循环、横向耦合、系统整合的新思路,对调整苦卤化工行业的产品结构,提高企业的经济效益具有实际意义。     

用循环经济理念发展小麦产业——以安徽省淮北市为例

农业循环经济是一种新兴的经济发展模式,发展循环农业是实施实现农业可持续发展战略的重要途径。该文以安徽省淮北市为例,从农业循环经济理念的角度分析小麦产业存在的问题,并提出投入减量化,产出最优化,主副产品再利用、再循环,构筑小麦产业经济利益共同体以及优惠政策支持等小麦产业发展对策。     

发展循环经济在构建社会主义和谐社会中的价值思考

构建社会主义和谐社会是我国社会发展的目标,在构建社会主义和谐社会过程中,要注意处理好人与自然的关系,大力发展循环经济。发展循环经济有助于保护环境,有利于构建社会主义和谐社会。     

Estimation and validation of hybrid choice models to identify the role of perception in the choice to cycle

Cycling is one of the most sustainable and ecofriendly modes of travel and a good form of exercise. Many government and public health authorities recommend cycling to stay fit as well as to reduce air and noise pollution, CO₂ emissions, traffic congestion, and other negative consequences of car use. In light of these benefits, a major challenge for researchers today is how to promote cycling. However, in countries where cycling is not common, apart from the need for proper cycling facilities, one major issue concerns people’s perception of cycling for sport or recreational activities rather than as a mode of transport. The aim of this paper is to explore the role of perception in the likelihood of the bike being used for utilitarian purposes. We focus on the perception of: the bicycle as a means of transport; bikeability (in terms of usefulness and safety) and of bike infrastructure. Hybrid Choice Models (HCMs) have been used to estimate the effect of people’s perception on the propensity to bike. The HCM also accounts for the serial correlation between error terms in the discrete and latent perceptions, to allow for agent-common unknown factors. Furthermore, we also validate the model results using a hold-out sample and discuss some policy measures aimed at changing travel behavior. The results suggest that, besides individual characteristics, latent aspects related to the perception of the context and of the bicycle as a means of transport strongly affect the propensity to cycle.     

循环经济体系中资源流动原理及平衡分析

本文在分析资源种类的基础上,对资源的流动方式进行了研究,分别建立了单环节与多环节的资源流入—流出平衡模型,并引入资源有效利用系数和资源利用总系数分别对资源在单环节上和多环节上的利用效率进行了分析,结论指出只有增加产品产出量,提高副产品、废弃物的利用量,减少过程损耗量才能保证经济、社会、生态三方面效益的最优。     

循环物流系统中配送/回收成本优化模型研究

对循环物流系统的概念和其成本构成进行了界定,针对循环物流中的配送及回收成本,从物流回收可能给制造商带来收益的角度,提出了一个新的成本核算和优化模型。     

中国发展内循环经济与拉动内需的思考

中国巨大的经济体量仅仅依靠外部需求拉动已不太现实,内需市场和内循环经济的重要性由此凸显。2018年中美贸易战爆发以来,外部经济环境变化使得外循环经济的可靠性大打折扣,中国急切需要一个强大稳定的内需市场予以支撑。中国企业自主创新能力和全要素生产率提升能力不足、企业在全球价值链分工中的位次不利于提升制造业部门工资水平、经济金融化和钱生钱逻辑倾向不利于扩大中等收入群体规模等问题,逐渐成为当前中国拉动内需、发展内循环经济的突出体制机制障碍。应采取积级应对当前不利局面、推动经济增长内生动力机制转换,积极应对美国打压、培育内需市场为中国高科技发展提供动力,坚持国内国际双循环发展新格局,加快形成两个市场良性循环机制等措施,推动中国经济持续健康发展。     

Can the built environment explain gender gap in cycling? An exploration of university students' travel behavior in Toronto,Canada

The benefits of cycling as a healthier and more sustainable transportation alternative to private automobile is emphasized in both literature and policy. One key policy challenge in improving cycling rates is the significant gender gap in cycling that exists across urban regions in North America. In this study, travel behavior of >10,000 students attending four universities in Toronto, Canada, was analyzed to explore gender-based differences in cycling uptake. The mode share for cycling was higher for non-commute trips (9%) when compared to commuting trips to universities (7.6%). In addition, men had higher cycling rates than women, for both commute and non-commute trips. Results from binomial logistic regression models indicate that the built environment-related correlates were different between male and female students, and between commute and non-commute trips. Access to bicycle lanes or cycle tracks was found to increase the odds of female commuter cycling. This effect, however, was moderate in the neighborhoods with higher land use mix. Further, high-speed traffic was a significant barrier to cycling among female commuters. Noticeably, our analysis did not find major gender-based differences in the coefficients relating to travel attitudes and preferences. The findings provide a Canadian comparison to the limited international research on this topic, as well as offer new insights particularly relating to cycling for non-commute trips. The results identify potential avenues for policy intervention regarding the promotion of healthy and sustainable travel behavior among post-secondary students, and more broadly, the millennial generation.     

Mountain bike tourism in Austria and the Alpine region – towards a sustainable model for multi-stakeholder product development

This paper interrogates the polarized and heated discussions about mountain bike tourism in Austrian forests, with several organizations favoring permitting biking on all forest roads, using claimed tourism development opportunities, while other stakeholders including hikers, hunters and landowners wish to restrict development. An international literature review on the value and impacts of mountain biking shows that both sides have oversimplified complex cases. The paper draws on 12 in-depth interviews with Austrian tourism destination and mountain bike experts to find ways forward. Results suggest that in Austria, bike tourism will increase in the future, supported by new bike technology, including electric bikes and new hand-held route information technology. It notes the complexity of the market for mountain and other forms of cycle tourism, and the pressing need to create not more trails but more sophisticated tourism products, including appealing and well-maintained trails plus attractive leisure infrastructure (bike rental, service and repair facilities, attractive localities, accommodation suited to the mountain bikers’ needs, etc.). Collaborative planning with all stakeholders, better trail construction standards adapted to differing preferences, needs and environmental conditions as well as clear standards for monitoring are prerequisites of an Austrian strategy for sustainable cycle tourism development and management, which can be replicated elsewhere.     

中国货币流通速度的实证考察(1980～2000年)

在考察1980～2000年货币流通速度特征后,分析并解说引致货币流通速度下降的成因,指出我国近期货币流通速度趋缓是由于资金循环链条的断裂所致。