A proposed configurable approach for recommendation systems via data mining techniques

This study presents a configurable approach for recommendations which determines the suitable recommendation method for each field based on the characteristics of its data, the method includes determining the suitable technique for selecting a representative sample of the provided data. Then selecting the suitable feature weighting measure to provide a correct weight for each feature based on its effect on the recommendations. Finally, selecting the suitable algorithm to provide the required recommendations. The proposed configurable approach could be applied on different domains. The experiments have revealed that the approach is able to provide recommendations with only 0.89 error rate percentage.     

基于主体功能定位的湖北省县域乡村性空间分异研究

[目的]确立与主体功能区定位相协调的乡村发展类型与乡村政策,是促进城乡融合、乡村振兴的重要措施。[方法]以湖北省县域为空间单元,构建乡村性评价指标体系,并基于三次产业的产值结构,划分县域的乡村发展类型。[结果](1)2016年湖北省县域乡村性指数相对较高,乡村性呈现出东低西高的空间分布格局。乡村发展类型可划分为农业主导型、工业主导型、商旅服务型和均衡发展型,分别占县域总数的25.29%、16.1%、10.71%和48.28%。(2)重点开发区的乡村类型以工业主导型和商旅服务型为主,乡村类型主要是城镇化和工业化带动,市场、资本推动力和农民的自主选择突出;农产品主产区和重点生态功能区的乡村类型均以农业主导型和均衡发展型为主,不同的是农产品主产区的农业自然和生产条件优越、农耕文化根植,农业政策扶植,乡村类型是由农业现代化和产业化推动;重点生态功能区乡村类型受资源环境约束、经济基础及行政干预的推动。[结论]三大主体功能区下的乡村类型及驱动机制存在差异,并提出不同乡村振兴发展的政策建议。     

自然生态空间用途管制分区划定研究——以平潭岛为例

研究目的:在明确自然生态空间内涵和分类的基础上,探讨自然生态空间用途管制分区划定的逻辑框架和技术方法,提出自然生态空间分类、分级管制规则。研究方法:文献综述与GIS空间分析。研究结果:根据不同自然生态系统类型及其空间分布特征将自然生态空间类型划分为森林生态空间、草地生态空间、湿地生态空间和荒地生态空间;基于景观功能识别并按不同管控等级将自然生态空间管制类型区划分为红线区、橙线区和黄线区;同时,依据不同地块主要功能进一步确定自然生态空间用途管制分级,划定用途管制分区结果。研究结论:基于"区域主体功能—景观主导功能—地块主要功能"的自然生态空间管制分区划定逻辑框架,可为构建以功能分类、用途分区、管控分级为导向的自然生态空间用途管制体系提供理论依据和实践借鉴。     

耕地利用多功能权衡关系测度与分区优化 ——以河南省为例

研究目的:分析河南省耕地利用多功能空间分布特征、多功能权衡关系区域差异,提出分区优化管控措施。研究方法:耦合协调度方法、权衡强度方法。研究结果:(1)河南省各县(区)耕地利用多功能呈现明显的空间异质性,中原城市群生产功能和社会保障功能优势明显,黄淮平原生产—生态功能强;(2)多功能协调度、权衡强度空间差异明显,中原城市群和豫北地区协调程度高、权衡强度低;(3)全省可耕地划分为多功能高协调区、多功能低协调区、单功能主导区、生产—生态协调区、生产—社会保障协调区、生态—社会保障协调区6大区域。研究结论:研究结果与河南省区域发展战略定位相符,揭示河南省耕地利用多功能分布和权衡关系,划分不同类型区并提出优化建议,为河南省农业空间管控提供决策支持。     

How Does Using a Mobile Device Change Investors’ Reactions to Firm Disclosures?

I examine how characteristics of investors’ information access tools change investors’ reactions to firm disclosures. I examine my research question in the context of information choice (i.e., allowing investors to choose the order of information and sections to read within a disclosure) and spatial layout (i.e., how information is displayed when viewing the disclosure). Results of an experiment are consistent with information choice improving investors’ judgments if the disclosure is viewed on a computer screen. Conversely, and consistent with cognitive overload, information choice harms investors’ judgments if the disclosure is viewed on a smaller screen, such as that of a mobile device. Follow-up experiments show that changing the disclosure presentation to reduce the need to scroll is one way to improve investors’ judgments on a smaller (or mobile) screen. My findings caution firms and regulators about expanding information choice within disclosures without considering the screen size used to access the disclosure.     

Economic Effect of Zoning Regulations on Korea's Small and Medium‐Sized Retailers*

In this paper, we investigated the economic effects of zoning regulations on the retail industry in Korea. We estimated the changes in the number of sales for retail stores using a panel regression analysis for stores in traditional markets. This analysis was conducted to examine the benefit of zoning regulations on retail stores. Our results show that the zoning regulations (called Traditional Commercial Activity Protection Zones) have contributed to an improvement in the actual business performance of small independent retailers. We found that the amount of sales for each store clearly increased on average in the areas designated as Traditional Commercial Activity Protection Zones where there was no market entry of mega supermarket chains (called SSM in Korea). We also present evidence that the effects of this policy differ geographically: the effects were stronger for small and medium cities than for large metropolitan cities. These results suggest that zoning regulations enacted by the government to protect traditional markets and small retailers should also consider regional differences when assessing policy effectiveness.     

Exploring the representativeness of the M5 competition data

The main objective of the M5 competition, which focused on forecasting the hierarchical unit sales of Walmart, was to evaluate the accuracy and uncertainty of forecasting methods in the field to identify best practices and highlight their practical implications. However, can the findings of the M5 competition be generalized and exploited by retail firms to better support their decisions and operation? This depends on the extent to which M5 data is sufficiently similar to unit sales data of retailers operating in different regions selling different product types and considering different marketing strategies. To answer this question, we analyze the characteristics of the M5 time series and compare them with those of two grocery retailers, namely Corporación Favorita and a major Greek supermarket chain, using feature spaces. Our results suggest only minor discrepancies between the examined data sets, supporting the representativeness of the M5 data.     

中西文化差异的语言表象及实质内涵

文化差异表现在社会生活的各个方面.中西文化差异如从语言表象入手考察,其实质内涵是价值观的差异.因此,在外语教学中应注意文化导入的必要性.     

全面推进素质教育促进学生个性发展

全面推进素质教育,了解素质教育的特点、必要性及摆正素质教育与个性发展之间的关系是很有必要的.通过一系列素质教育的实践手段促进学生个性的发展,这是基础教育的根本目的和最终任务.     

国家公园划定荒野保护区的意义与方法

世界自然保护联盟(IUCN)把荒野保护地列入保护 级别最高的一类保护地,荒野体验是游憩体验最高级别的体验 形式。世界各国荒野保护地实际存在形式大致分独立型和合 并型2类。划定荒野保护区是荒野价值研究成果的重要应用实 践,这是中国国家公园体制建设向深层次发展的重要方向。核 心保护区与荒野保护区对应IUCN保护地分类体系中的Ia、Ib 保护地,这样既可以同国际接轨,又解决了国内国家公园生态 保护管控与人类活动的矛盾问题。国家公园突出荒野保护理念 既建立了国家公园与社会的情感联系,强化了国家公园的社会 文化认同,又彰显了国家公园人与自然和谐共生的绿色发展理 念。栖息地适宜性评价与行为分析法是划定荒野保护区的重要 方法,通过栖息地适宜性评价建立国家公园生态环境谱系,在 生态环境谱系基础上通过行为交互作用分析建立游憩机会谱系 与社区村落谱系。荒野保护区整合了三大谱系,建构了以荒野 保护区为主体的管理分区体系,把各个功能区有机组织起来, 形成结构有序、自然共生的人地耦合复杂生态系统。