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排序方式: 共有223条查询结果,搜索用时 906 毫秒
1.
在零售4.0时代,渠道的多样化不仅丰富了数据源,还能迅速生成大量数据,需要通过分析大数据,为决策提取有意义的信息,通过分析先行发货的重要性,提出了一种基于遗传算法(GA)的优化模型,预测顾客何时购买,然后在顾客线下单前将产品运送到距顾客最近的配送中心,解决先行发货中存在的问题。研究认为,需要先部署云计算来存储所有渠道生成的大数据,再应用基于集群的关联规则挖掘研究顾客的购买行为,根据“如果-那么”预测规则预测未来的采购情况,最后利用修正的遗传算法生成最优的先行发货计划;这种遗传算法考虑了其在运输成本和运输距离之外,还有预测规则的置信度,利用大量的数值实验权衡了先行发货中的不同因素,验证了模型的最优可靠性 相似文献
2.
邵丽娜 《渤海大学学报(哲学社会科学版)》2003,25(3):124-126
通过对英语教学现状的分析 ,对英语教学的改革与创新做了初步的探讨 ,说明了教学改革势在必行 ,并提出了今后教学改革的思路。 相似文献
3.
通过对常见的田间三种渠道特性夏适应性分析,反应出推广U型砼槽的必要性。给我们今后在水利工程田间渠道结构形式的选用上,提供了帮助。 相似文献
4.
5.
总结国内外交通影响评价方法。通过对美国交通影响评价的分析,从分析目的、作用、方法、基础理论四方面提出适合我国交通影响分析一般方法的特点,并对交通影响评价在协调城市交通和土地利用关系的定位进行研究: 相似文献
6.
In this paper we explore annual earnings as well as full-time monthly earnings differentials resulting from sexual orientation. We observe that gay males are at an earnings disadvantage compared to male heterosexuals regardless of which earnings measure we use. This earnings disadvantage is found to be larger when we compare gay and heterosexual males who are working full-time. In addition, the disadvantage is larger in the private than in the public sector. Lesbians, however, earn more than heterosexual females. This earnings advantage is considerably smaller when we study full-time monthly rather than annual earnings but an earnings advantage for lesbians at the top of the earnings distribution is documented regardless of which earnings measure we use. In addition, lesbians are doing better than female heterosexuals in the public sector. To sum up, the results indicate that gay males face obstacles on the labor market that hinder them from reaching top-level positions and high earnings. The earnings advantage observed for lesbians is likely to stem from the fact that lesbians devote more time to market work than heterosexual females do. 相似文献
7.
Lina Suleiman 《Voluntas: International Journal of Voluntary and Nonprofit Organizations》2013,24(1):241-261
The role of civil society in the improvement of equitable development and the stimulation of democratic culture has been notably recognised by international development agencies. In the new policy of ‘good governance’ that proposes progress regarding development and democracy in parallel in the developing countries, civil society is often represented by non-governmental organisations (NGOs). This paper bases its arguments primarily on theories in relation to the role of civil society with regard to development and democracy to raise concerns about current policy trends of ‘good governance’ in the general context of developing countries with the main focus on Africa. The concerns are substantiated by empirical verification through a review of literature. The paper concludes that NGOs are unlikely to have the strength to either promote development or foster democracy. 相似文献
8.
刘丽娜 《北京工商大学学报(社会科学版)》2007,22(1):7-11
制度和契约是两个难以分清的概念。长期以来,人们认为制度就是契约,契约就是制度。实际上契约与制度既有着紧密联系,又有着重大区别。法学和制度经济学对于制度和契约关系的理解是分别从不同的侧面进行的,都是不全面的。作者从契约与制度的基本概念入手,通过对二者关系的深入考察,得出制度是契约的核心内容、是契约的外在表现这一结论。 相似文献
9.
Lina Hartocollis 《Clinical Social Work Journal》1998,26(2):159-176
This article explores the social construction of multiple personality disorder by analyzing professional agreements about the nature of the diagnosis, while locating these within their historical and cultural context. First, a historical review of the disorder traces various overlapping streams of discourse that have shaped the construction of the diagnosis. This is followed by a cross-cultural comparison of MPD and dissociative phenomena in several non-Western societies. The article concludes with some reflections on the cultural meanings of MPD in contemporary America. 相似文献
10.
Marcel Erlinghagen Lina Zink 《KZfSS K?lner Zeitschrift für Soziologie und Sozialpsychologie》2008,60(3):579-608
An international comparison of unemployment rates suggests a poor performance of the German labour market. Based on comparative analyses for Germany, the Netherlands, France, Denmark, the UK and the United States the paper tries to show that a more sophisticated picture can be drawn by taking additional forms of non-employment (e.g. disability, retirement or out of labour force) into account. For this purpose data from the “European Social Survey” (ESS) and the survey “Citizenship, Involvement and Democracy” collected in 2004 and 2005 is analysed. While “unemployment” plays a dominant role in Germany, people with comparable demographic characteristics and similar health status are increasingly classified as “permanently disabled” in the other countries. The results stress that an international comparison of labour market performance and especially a comparison of the effectiveness of labour market and social policy reforms should not only rely on employment and unemployment rates. Taking alternative forms of non-employment into account can increase our knowledge and understanding of functional differences of labour markets in Europe and the United States. 相似文献