基于模糊多属性群决策的维护方式选择研究

维护方式选择是维护管理中的重要工作之一,合理的维护方式既能达到保障设备的稳定运行,又能同时兼顾其它各个方面的要求。由于对维护方式的评价涉及多个部门、人员和属性,有些指标只是一个模糊的概念,因而采用模糊多属性群决策的方法对维护方式进行优先抉择。本文结合A公司的设备维护方式选择问题,尝试使用模糊多属性群决策折衷算法求解最佳的维护方式。     

Perceptions of the benefits of the A3 planner in facilitating project-based learning in accounting education

This paper evaluates ways of instilling project management skills into accounting-based learning by the use of an iterative A3 planner to plan, monitor and review assignment progress. The application of an A3 planner to facilitate a project-based learning (PBL) group assignment in undergraduate accounting education has been critically evaluated in terms of both the student and tutor experience. The study uses a mix of qualitative and quantitative data. Quantitative data assisting exploration of perceptions were collected through 100 undergraduate students. A series of focus group discussions were carried out to investigate students’ engagement and tutors’ teaching experiences regarding the adoption of the A3 planner. The results suggest that the A3 planner promotes active planning and effective management of a PBL group assignment. It makes students’ thought processes more visible thereby facilitating and enhancing the tutoring/mentoring process. Moreover a more interactive and transparent approach by doing assignment via the use of an iterative A3 planner has ensured more feedback points and action based efficiency in the doing approach for learners.     

On the power of indicators: how the choice of fuel poverty indicator affects the identification of the target population

In light of the creation of the EU Energy Poverty Observatory (EPOV) in January 2018 and the increase in debates on how fuel poverty is measured, we propose a critical analysis of fuel poverty indicators and demonstrate that choosing a given indicator is central to the identification of the fuel-poorpopulation.

First, we conducted an inter-indicator analysis to show how profiles of fuel-poor households vary depending on the indicator selected. We designed a multidimensional approach based on a multiple correspondence analysis and a hierarchical and partitioning clustering analysis to study characteristics of fuel-poor households. We highlight the difficulty of identifying a fuel-poor ‘typical profile’ and show that the composition of the population depends on the choice of the indicator.

Second, we applied an intra-indicator analysis using two objective expenditure-based indicators with thresholds. In particular, we conducted a sensitivity analysis based on a logit model including variables describing household and dwelling characteristics. We show that the profiles of fuel-poor households as well as the drivers of fuel poverty vary considerably with the chosen threshold level.Given these findings, we stress the need to review how we currently rely on conventional fuel poverty indicators to identify target groups and give some recommendations.     

The effects of exchange rate pass-through and cost channel on price level: The case of fragile five countries

ABSTRACT

In this study, we investigated whether the exchange rate and the interest rate had an effect on the inflation rate in the fragile five countries between the years of 1996Q4 and 2015Q4. In this context, a model was created to estimate the effect of interest rate and exchange rate on the inflation rate. The methods used in the study take into account cross-section dependence and heterogeneity. As a result of the analysis, it was determined that there was an exchange-rate and interest-rate pass-through effect in the fragile five countries. Moreover, it was found out that the cost channel and price puzzle were effective in Indonesia and South Africa but were not effective in Turkey, Brasil and India.     

Rotating group representatives and group members’ requests in repeated public goods game

ABSTRACT

This study investigated the effect of group representatives on contribution behaviour in response to group members’ requests in repeated public goods games. Data came from 135 students in 15 groups enrolled in the experiment, grouped in the following treatments: no group representatives (NR, NRG) and group representatives (R1, R2). We also tested initial requests wherein the group members’ initial requests (i.e. NRG, R2) mediated the positive relationship between individual-level contribution preferences and group contributions. We used a fixed-effects GLS regression and IV regression to analyse the effect of group representatives and group members’ requests. The results indicated the following: (a) rotating group representative/group members’ requests was related to group contributions at the session (within-members) and group (between-group) levels; (b) the reactions to members’ requests positively predicted group contributions; (c) subjects in the no group representatives treatment formed their requests by relying more on previous group contributions than subjects in the group representatives treatment, who relied more on the previous group members’ requests; and (d) the initial requests explained long-term contribution levels, which resulted in variations in group contributions observed between the NRG and R2 treatments. Our findings highlight the role of rotating group representatives in stimulating cooperation among members, while group members’ requests impel individuals to make contribution decisions at the group level.     

Attitudes of ageing passengers to air travel since the coronavirus pandemic

The coronavirus pandemic has had a devastating impact on the demand for air transport. One passenger segment that has received relatively little attention is ageing passengers (defined as aged 65+), in spite of the fact that this group has been disproportionately affected by COVID-19, and in recent years has been viewed as a potential growth market. Therefore, the aim of this brief paper is to analyse the attitudes of ageing passengers by assessing air travel plans in the next 12 months, examining the factors influencing future flying decisions, and investigating the impact of the coronavirus pandemic on perceived risks and experiences associated with flying. The findings show that over 60% of ageing passengers are planning to travel by air in the next 12 months, although the nature of their trips may change. Factors such as flexible ticket booking and quarantine rules do not appear to be key drivers affecting travel decisions and within the different stages of the air journey, getting to/from the airport is perceived as the safest stage. The findings suggest that there are various COVID-19 implications for airlines and airports serving this market segment, ranging from the use of self-service technology, the generation of commercial/ancillary revenues and the design of surface access policies.     

To Empower or Not to Empower? Multilevel Effects of Empowering Leadership on Knowledge Hiding

It is widely acknowledged that knowledge hiding persists and has detrimental effects in service organizations. With organizations increasingly becoming team based, understanding the interactions between supervisor and team members especially how team- and individual-level empowering leadership behaviors influence followers’ knowledge hiding is important. Using data on 527 followers from 60 departments in 19 Chinese hotels, the study proposes a multilevel model to examine the manifestation of two types of empowering leadership (individual-focused and differentiated empowering leadership) and the dual-level processes on followers’ knowledge hiding. Results show that differentiated empowering leadership is positively related to followers’ knowledge hiding via group relational conflict, whereas individual-focused empowering leadership is negatively related to followers’ knowledge hiding via their psychological safety. In addition, follower’s psychological safety buffers the positive relationship between group relational conflict and followers’ knowledge hiding. We discuss the implications on both theory and practice of empowering leadership on knowledge hiding.     

The interest group theory of financial development in China: Openness and the role of interest groups

The interest group theory of financial development predicts that the incumbents' opposition to financial development will be weaker when an economy is open to both trade and capital flows. Based on regressions of financial development on trade and financial openness, existing studies only provide indirect tests of the hypothesis and deliver mixed findings. This paper proposes models for direct tests of interest group theory for China. Using Chinese cross-province data, we define and measure interest groups based on the close tie between state-owned enterprises and local government in China. The empirical results show that the opposition from interest groups to financial development cannot be weakened in provinces with high trade or financial openness alone. However, the opposition is indeed weakened in provinces with high levels of both trade and financial openness. These results provide robust support for interest group theory in accounting for cross-province differences and time-series variation in financial development in China.     

钻孔咬合桩在复合地层中的应用研究 ——以杭州地铁3号线工业大学站为例

钻孔咬合桩多用于软土地层,采用全套管钻机软切割法施工,但在上软下硬的复合地层中,全套管法成孔困难,无法保证桩体的垂直度,以致于咬合效果达不到设计要求。为了解决此类工程问题,依托杭州地铁3号线一期工程工业大学站基坑工程,研究了钻孔咬合桩在上软下硬复合地层中的适应性及应用情况,并与其他围护方式在可实施性、安全性、经济性、施工效率等方面进行了综合比较。研究结果表明,在复合地层中采用旋挖钻机硬切割法施工咬合桩,成孔效率高,桩体垂直度高,止水效果好,能产生更好的工期效益、社会效益和经济效益。并且钻孔咬合桩能够很好地适应复合地层,经济性好,施工效率高,解决了复合地层中钻孔咬合桩的施工工艺和设备选型问题。研究过程及结果可为复合地层中的基坑工程施工提供借鉴与参考。