零售4.0时代先行发货问题的大数据分析

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     

浅谈英语教学的改革与创新

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。     

三种渠道断面结构形式的适用及经济性分析

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。     

批评隐喻分析——基于概念隐喻理论和概念整合理论的理论框架

隐喻已经成为批评话语分析的重要组成部分。作为认知隐喻理论的最新发展成果,概念整合理论同样可以和批评话语分析进行融合。Charteris-Black提出的批评隐喻分析理论主要是以概念隐喻理论为分析工具,忽视宏观语境,无法解释新奇隐喻,然而概念整合理论能够弥补这些缺点。提倡建立以概念隐喻理论和概念整合理论为基础的连贯的全面的批评隐喻分析理论框架。     

当代西方风险社会理论的三个研究维度探析

目前西方关于风险社会的研究渐已形成了三个不同的研究维度,即制度维度、文化维度、系统与环境维度,它们分别基于不同的视角和理路对现代社会风险和风险社会进行了独特的阐释。本文在对三个研究维度进行梳理和分析的同时,分别就各研究维度的理论预设、认知取向、研究视角等进行了剖析和审视,并进一步理清其各自的价值预设、架构体系及本质特征等,以达到对西方风险社会理论较为准确的把握和理解。     

A simpler PTAS for connected <Emphasis Type="Italic">k</Emphasis>-path vertex cover in homogeneous wireless sensor network

Because of its application in the field of security in wireless sensor networks, k-path vertex cover (\(\hbox {VCP}_k\)) has received a lot of attention in recent years. Given a graph \(G=(V,E)\), a vertex set \(C\subseteq V\) is a k-path vertex cover (\(\hbox {VCP}_k\)) of G if every path on k vertices has at least one vertex in C, and C is a connected k-path vertex cover of G (\(\hbox {CVCP}_k\)) if furthermore the subgraph of G induced by C is connected. A homogeneous wireless sensor network can be modeled as a unit disk graph. This paper presents a new PTAS for \(\hbox {MinCVCP}_k\) on unit disk graphs. Compared with previous PTAS given by Liu et al., our method not only simplifies the algorithm and reduces the time-complexity, but also simplifies the analysis by a large amount.     

试析中原地区出土夏商周时期和田玉器及其相关问题

夏商周时期,中原地区开始出现和田玉器,并且数量越来越多,这与夏商周时期是中原地区王权和国家形成和发展的重要时期有关,和田玉料作为一种稀有矿产资源,其分布的范围和拥有当和地区间文化交流和绝对权力的形成有关联。     

青少年学业压力、父母支持与精神健康

追求学业上的成就,并由此实现社会流动、赢得尊敬和家庭的荣耀是中国文化的传统。但对教育成就的重视也导致儿童承受很大的压力,引发心理和身体的疾病。对上海685名学生学业压力与精神健康的调查证实,学业压力是加剧学生焦虑的风险因素,而父母的情感支持是促进儿童精神健康的保护性因素。因此促进父母对儿童的学习参与是重要的,但要注意时机,动态了解儿童的学习压力状况并提供及时的情感支持,这样有助于儿童的精神健康。     

The Holodomor law and national trauma construction in Ukraine

This article proposes to conceptualize the remembrance of the 1932–33 famine, known as the Holodomor, as cultural trauma construction in Ukraine. This entails the study of how the memory of this devastating historical event became the national collective symbol of suffering with which Ukrainians identify today. Based on Jeffrey Alexander’s concept of cultural trauma, the analysis focuses on the role of political elites and their claim-making regarding the meaning of the famine. Focusing specifically on the 2006 Holodomor law as the main claim of the Ukrainian policy-makers, the article investigates their definition of the historical event, their naming of victims and perpetrators, and their social mediation of famine representations. The article reveals how, through their definition of the Holodomor as genocide, the political elites promoted the understanding that Ukrainians experienced the years of 1932–33 differently from other Soviet nations. The Holodomor law should therefore be seen in the context of Ukrainian nation-building policy, which aims to forge a distinct Ukrainian collective identity.