图书馆流通数据仓库的设计与实现     

胡根桥 《现代情报》2007,27(7):68-70

本文首先阐述了数据仓库的思想，并讨论了图书馆流通系统建立数据仓库的必要性，接着通过具体的例子分析了图书馆流通系统数据仓库的设计过程，从而实现数据仓库技术在图书馆流通系统中的应用，并通过具体的实例展示对流通系统数据仓库进行联机分析的结果。  相似文献   

一种有效的数据仓库定制应用方式     

王国友  王命延 《科技广场》2004,(8):27-29

本文介绍了如何利用DELPHI中的数据仓库组件开发数据仓库应用系统，为用户提供一种有效的定制的数据仓库应用方式，利用此组件可进行灵活的多维数据分析。  相似文献   

中国月平均地表反照率的估算及其时空分布   总被引：12，自引：1，他引：12  

蔡福  祝青林  何洪林  刘新安  于贵瑞 《资源科学》2005,27(1):114-120

本文利用1948年～2003年55年平均的NCEP/NCAR(National Center for Environmental Prediction/National Center for Atmospheric Research,美国国家环境预报中心/美国国家大气研究中心)再分析辐射资料和中国10km×10km土地利用类型图,借助GIS、GrADS(Grid Analysis and Display System,网格分析与展示系统)等空间化技术,采用图形回归处理等方法建立了国家尺度的10km×10km的中国地表月平均反照率栅格图.研究表明,估算的地表反照率的季节变化十分明显:冬季(1月)最大,夏季(7月)最小,春秋季(4月和10月)次之,且秋季比春季稍大;空间分布与地理纬度、地势高低和距海远近关系很大,西部地区大于东部地区,北部地区大于南部地区,高海拔地区大于丘陵和平原地区.几种土地覆被类型反照率的估计值如下:林地、水稻和小麦地为0.17～0.23;草地为0.20～0.32;雪被为0.44～0.76;沙漠为0.35左右.总的来说,估算结果比较合理,能够较好地反映出中国地表反照率的时间、空间变化特征,也能反映多年气候平均值的特点.因此,在目前气候要素之一的多年平均的地表反照率研究较少的情况下,利用多年平均NCEP/NCAR再分析资料与土地利用类型图进行回归处理不失为是一种相对合理的方法.  相似文献   

Privacy Rights and Protection: Foreign Values in Modern Thai Context     

Krisana?KitiyadisaiEmail author 《Ethics and Information Technology》2005,7(1):17-26

The concept of privacy as a basic human right which has to be protected by law is a recently adopted concept in Thailand, as the protection of human rights was only legally recognized by the National Human Rights Act in 1999. Moreover, along with other drafted legislation on computer crime, the law on privacy protection has not yet been enacted. The political reform and the influences of globalization have speeded up the process of westernization of the urban, educated middle-class professionals. However, the strength of traditional Thai culture means that a mass awareness of the concept of privacy rights remains scarce. This paper explicates the Thai cultural perspective on privacy and discusses the influence of Buddhism on privacy rights, including the impacts of globalization and the influence of Western values on the country’s political and legal developments. The paper also discusses the legal provisions regarding privacy protection, and the debates on the smart ID cards policy and SIM cards registration for national security.  相似文献   

我国信息化条件下国际贸易实务研究     

倪勇  刘元宁  李闯 《情报科学》2006,24(10):1481-1485

信息化在国际贸易中的作用日益显现。本文从国际贸易信息化进程的现状谈起，分析了国际贸易应用信息化技术所引发的一系列变革，并在此基础上，依据传统的国际贸易流程，综合了我国进出口贸易信息处理的特点，提出了中国国际贸易信息化的三层结构总体框架模型和实务商务过程模型。  相似文献   

An empirical investigation of information sharing behavior on social commerce sites     

《International Journal of Information Management》2016,36(5):686-699

Social commerce sites (SCSs), a new model of social media, provide fertile ground for customers to communicate their opinions and exchange product- or service- related information. Given the significant opportunities related to the use of social media data for customers’ insight, we explore the factors driving information sharing behavior on SCSs. In this paper, we propose and empirically test a comprehensive theoretical model for customer information sharing behavior through analysis of online survey data as well as network and behavioral usage data of over four months from 1177 customers in a SCS. The research model was empirically validated with the use of both subjective and objective data in a longitudinal setting. Our results show that customer information sharing is influenced by both individual (i.e., reputation and the enjoyment of helping others) and social capital (i.e., out-degrees’ post, in-degrees’ feedback, customer expertise and reciprocity) factors. This study contributes to the existing literature by highlighting the role of directed social network in customer information sharing behavior on SCSs. We believe that the results of our study offer important insights to the IS research and practice.  相似文献   

市场因素与高技术产业创新成果转化:促进还是抑制?     

王斌  谭清美 《科学学研究》2016,(6):850-859

利用1995-2012年中国五个一级高技术产业面板数据,建立差分GMM模型、系统GMM模型,从动态视角分析了市场集中度、市场收益、市场外资化对创新成果转化的影响特征,研究发现:市场集中度对创新成果转化呈显著促进作用,若就此而言,市场集中度的适度提升可以容忍;市场收益提升可激励高技术产业创新成果转化,且市场集中度对市场收益促进创新成果转化有正向调节作用;外资所占市场份额的提升,对创新成果转化的影响呈倒"U"型特征,且市场集中度对外资势力因素促进创新成果转化有正向调节作用;在动态视角上,创新成果转化活动具有正向累积影响效应。相关结论和建议可为我国高技术产业创新成果转化实践提供借鉴意义。  相似文献   

Automatic extraction of bilingual word pairs using inductive chain learning in various languages     

Hiroshi Echizen-ya  Kenji Araki  Yoshio Momouchi 《Information processing & management》2006

In this paper, we propose a new learning method for extracting bilingual word pairs from parallel corpora in various languages. In cross-language information retrieval, the system must deal with various languages. Therefore, automatic extraction of bilingual word pairs from parallel corpora with various languages is important. However, previous works based on statistical methods are insufficient because of the sparse data problem. Our learning method automatically acquires rules, which are effective to solve the sparse data problem, only from parallel corpora without any prior preparation of a bilingual resource (e.g., a bilingual dictionary, a machine translation system). We call this learning method Inductive Chain Learning (ICL). Moreover, the system using ICL can extract bilingual word pairs even from bilingual sentence pairs for which the grammatical structures of the source language differ from the grammatical structures of the target language because the acquired rules have the information to cope with the different word orders of source language and target language in local parts of bilingual sentence pairs. Evaluation experiments demonstrated that the recalls of systems based on several statistical approaches were improved through the use of ICL.  相似文献   

我国居住水平的长期和短期影响因素实证分析     

符淼 《预测》2007,26(4):15-21

本文利用协整检验和面板数据分析我国居住水平的长期和短期影响因素。发现利率、收入房价比与居住水平存在长期协整关系,说明利率的提高长期会降低居住水平,限价、限开发房屋种类的政策是短期行为,提供低息房贷和发展中低档商品房的同时提高居民收入的方法才是长效的。面板数据分析发现提高人均收入和维持房地产市场稳定对提高居住水平有重要的作用。东西部房地产市场存在地区差异,东部对利率较敏感,中西部对收入和物价的变化较敏感,针对差异可选择不同的政策。  相似文献   

面向城市应急管理的情报能力建设思考     

李阳 《现代情报》2019,39(5):17-23

[目的/意义]研究面向城市应急管理的情报能力建设问题，既是大数据时代城市应急管理变革的基本要求，也是实现城市智慧应急的重要途径，能够推动应急管理情报支持的理论创新与实践应用。[方法/过程]立足情报能力与城市应急管理之间的逻辑关系，阐释城市应急管理情报能力的内涵，从多维视域探讨城市应急管理情报能力建设的主要内容，分析新时代城市应急管理情报能力建设的发展机遇。[结果/结论]情报能力建设是城市应急管理的关键支撑。城市应急管理情报能力建设涉及情报资源、情报人员、情报管理、情报技术、情报实战等多方面的内容。目前，应抓住新型智慧城市建设与情报治理创新两个方向的发展机遇，支持城市应急管理情报能力的综合提升。  相似文献