银川市暂住流动人口的调查与研究

通过调查 ,对宁夏回族自治区暂住流动人口最为集中、流动量也最大的首府银川市所辖三个城市区的流动人口做了分析 ,从理论和实践上提出了对宁夏城市流动人口的相关对策     

To Be or Not to be Temp? An Analysis of the Moderating Role of Motives for Accepting Temporary Employment

We investigate the role of contract volition and motives for accepting temporary employment in the relationship between precariousness of life and negative psychological symptoms in a sample of 275 Italian temps. Results suggest that the negative effect of contract volition on negative psychological symptoms is partially mediated by precariousness of life. A moderated mediation model shows that specific motives moderate the negative effects of contract volition on precariousness of life, so that when contract volition is higher, workers with weaker motives feel less precarious. This study broadens our understanding of temporary employment outcomes by showing that the negative consequences of precariousness of life seem to be less troublesome among temporary workers with higher contract volition and lower motivation. © 2018 ASAC. Published by John Wiley & Sons, Ltd.     

Happiness and freedom in direct action: critical mass bike rides as ecstatic ritual,play, and temporary autonomous zones

Most leisure research does not consider collective action and social change, while most social movement research overlooks carnivality and spontaneity. A counter-example is the alternative bicycling movement critical mass (CM), a rebellious, liberatory leisure and cultural event. CM is goal-oriented and a libidinal expression of participant desire. This paper investigates CM’s production of happiness and freedom via three heterodox theories. Ecstatic rituals are repetitive, cathartic collective events that people engage in to express joy and flaunt convention. Political theories of play interpret individual’s physically-embodied, creative, and performative actions. Temporary autonomous zones are spatial locations of resistance to authority that evade state detection and suppression. CM – unlike standard bike races or conventional movement protest – transcends the limitations of physical exercise, lackadaisical leisure, and militant direct action. Instead it is a hybrid form of collective action, combining premeditated ritual, rebellious play, and mobile freedom-seeking.     

生物多样性视角下城市闲置地的微更新 探索——以临时社区花园为例

生物多样性在城市环境中发挥着重要的作用。作为城市闲置地微更新的常见方式,临时社区花园能够带来很高水平的生物多样性和生态系统服务,是城市优化绿色空间的良好途径之一。社区花园在改善闲置地生境质量的同时,也受到植被结构和管理维护水平等因素的影响。通过对临时社区花园典型案例的分析,探讨了灵活的城市闲置地微更新方式在我国城市的适用性。     

草土围堰施工方法

草土围堰是临时围堰常用的办法,防渗漏较好且经济实用。文章详述了草土围堰施工的具体要求、施工工序和方法,指出了施工过程中容易发生的问题及处理措施。     

Spillovers and absorptive capacity in the decision to innovate of Spanish firms: the role of human capital

This paper investigates whether the existence of knowledge spillovers and the capacity of firms to assimilate them, which we relate with R&D intensity and some human resource management practices, are associated with the decision to innovate of Spanish firms. In order to do this, we employ data from the ‘Central de Balances’ database, which covers both manufacturing and services firms during the period 2003–2007, and use an estimator proposed by Wooldridge [2005. Simple solutions to the initial conditions problem in dynamic nonlinear panel data models with unobserved heterogeneity. Journal of Applied Econometrics 20, no. 1: 39–54] for dynamic random effects discrete choice models. The empirical exercise provides evidence on the positive link between spillovers and the innovative behaviour of companies, not just for the knowledge generated in the same industry, but also for that generated in the same region or by the public sector. Moreover, this link is stronger for those firms with a higher capacity to absorb those spillovers. This ability not only works through firms’ R&D capabilities, but also through factors such as the quality of the labour force, the share of temporary employment and the amount of resources spent in training. In addition to these factors, we find that innovation performance exhibits a high degree of inertia. Further, some other observed firm characteristics, such as size, sales growth, export behaviour, sector capital intensity or financial structure variables, are also found to be relevant determinants of the likelihood of innovation.     

Continuous rainbow options on commodity outputs: what is the real value of switching facilities?

We develop real rainbow option models to value an operating asset with the flexibility to choose between two commodity outputs. We provide a quasi-analytical solution and a numerical lattice solution to a model with continuous switching opportunities between two commodity outputs, taking into account operating and switching costs. The models are applied to an illustrative case, demonstrating that the quasi-analytical solution and the lattice approach provide near identical results for the asset valuation and optimal switching boundaries. We find that the switching boundaries generally narrow as prices decline. In the presence of operating costs and temporary suspension, however, the thresholds diverge for low enough prices. A fertilizer plant with flexibility between selling ammonia and urea is valued in an empirical section using our real option models. Despite the high correlation between the two alternative commodities, ammonia and urea, there is significant value in the flexibility to choose between the two. Both strategic and policy implications for stakeholders in flexible assets are discussed, with some generalisations outside the fertilizer industry.     

西安火车站春运车次调度优化

春运期间为尽可能大得满足客运需求,铁路部门需要在各大客运站增添临时旅客列车,春运临时旅客列车的增开需要考虑旅客满意度,经济效益,列车备用数量等因素。本文在现有临时旅客列车增添方案的基础上,结合相关约束条件,建立以旅客满意度最高和增加的列车数量尽可能少为目标的双目标优化模型,并以2013年西安站春运为实例,通过Net平台编写软件计算临时旅客列车的增开数量及调度方案,为优化春运临时旅客列车运行图提供了理论基础。     

Learning from the alien: knowledge relationships with temporary workers in network contexts

This paper contributes to our understanding of the role of temporary workers in learning for innovation in network contexts. The strategy literature advocates that the knowledge and talent of workers is vital to competitive success yet at the same time temporary workers are becoming more prevalent, making relationships with workers more ephemeral. These shifting competitive and employment contexts make insights into learning from, and with, contractual nomads paramount. The setting is the UK television industry, where such workers are dominant. Internationally, creative industries are a prime site of networks where temporary workers are brought together for specific projects. In the television industry, a range of knowledge attachment employee relationships have been developed by firms to ‘contain’ and sustain worker contributions in terms of knowledge and talent. These relationships are identified as freelance, regular contract, golden handcuffs and invest in knowledge firm. This paper highlights the learning implications both positive and negative arising from these different ways of relating to temporary workers thereby extending our understanding of employee relationships built on mutuality.