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41.
Anthony Bellotti Damiano Brigo Paolo Gambetti Frédéric Vrins 《International Journal of Forecasting》2021,37(1):428-444
We compare the performance of a wide set of regression techniques and machine-learning algorithms for predicting recovery rates on non-performing loans, using a private database from a European debt collection agency. We find that rule-based algorithms such as Cubist, boosted trees, and random forests perform significantly better than other approaches. In addition to loan contract specificities, predictors that refer to the bank recovery process — prior to the portfolio’s sale to a debt collector — are also shown to enhance forecasting performance. These variables, derived from the time series of contacts to defaulted clients and client reimbursements to the bank, help all algorithms better identify debtors with different repayment ability and/or commitment, and in general those with different recovery potential. 相似文献
42.
本文依据信息技术对人力资源管理的影响,建立了人力资源管理系统模型,并提出人力资源管理思维、方法及原则。 相似文献
43.
This paper estimates the dose-response relationship between air pollution and the number of work loss days for the Netherlands.
The study is based on illness data (work loss days) for the Dutch labour population and average year concentrations of air
pollution in 29 districts. The dose-response relationship has been estimated by means of two different techniques: the ordinary
least squares method (OLS) and the one-way fixed-effects method (OWFEM), which we consider to be more adequate. In general
health effects are much smaller when OWFEM is applied than if OLS is used. With OWFEM a significant relationship is found
between sulphate aerosol (SO4), ammonia (NH3) and the number of work loss days (WLDs). Particulates (TSP), O3 and SO2 have no significant effect on the number of WLDs. These results differ from those obtained in studies in the United States,
which indicate that particulates (TSP) and other small particles, ozone (O3) and to a lesser extent SO4 and SO2 significantly influence the number of WLDs. 相似文献
44.
We introduce an extension of the Mas-Colell bargaining set and construct, by an elaboration on a voting paradox, a superadditive four-person non-transferable utility game whose extended bargaining set is empty. It is shown that this extension constitutes an upper hemicontinuous correspondence. We conclude that the Mas-Colell bargaining set of a non-levelled superadditive NTU game may be empty. 相似文献
45.
46.
关于提高课堂教学质量的几点体会 总被引:1,自引:0,他引:1
肖胜中 《广东农工商职业技术学院学报》2005,(1)
作者根据多年的教学实践和经验得出:提高课堂教学质量的关键是科学合理地选取教学内容;改进教学方法,突出重点、分解难点;注重教师与学生互动,调动学生的积极性,提高听课率。 相似文献
47.
限时开发是快速应用开发的最佳实践之一。文章介绍了限时开发的基本概念和优点以及适用的项目范围,通过一个进销存软件的开发实例说明如何成功地应用限时开发方法。 相似文献
48.
物流产业评价指标与方法的探讨 总被引:2,自引:0,他引:2
本文首先对物流产业的概念进行界定,提出物流产业的判断基准;然后根据物流产业的内涵进行评价指标的设计,主要包括物流产业规模、效益、结构、资源、市场潜力等五个大类指标;最后运用主成分分析法建立物流产业的评价模型. 相似文献
49.
“牛鞭效应”是供应链管理中一种普遍存在的现象,随着经济的发展,竞争的加剧,如何消除“牛鞭效应”产生的危害.已经成为人们关注的一个问题。本论文通过具体的案例分析,说明“牛鞭效应”对整个供应链产生的负面影响;并根据此例.提出了一些解决问题的方法。 相似文献
50.
Action Research is Similar to Design Science 总被引:2,自引:0,他引:2
Pertti Järvinen 《Quality and Quantity》2007,41(1):37-54
In management information systems (MIS) action research is long considered as promising but low-level research approach. It
has an utmost relevance because action researchers are working with practitioners to solve the important practical problem.
Design science outlined some years ago is just winning a wider audience. Action research was traditionally classified into
qualitative research methods. But it seems to be the “wrong” home of action research. We shall show that after comparison
of the seven aspects: concrete results of the study, knowledge produced, activities, the intent and the nature of a study,
the division of labor in a study and generation, use and test of knowledge, the concordance between the characteristics of
action research on the one hand and of design science on the other hand is very good. Hence, action research and design science
should next be considered as similar research approaches, and this is a turning point in the history of both action research
and design science. 相似文献