基于Web服务的异构数据库信息互用系统

异构数据库的集成是数据库界的一个研究热点,根据异构数据库的功能需求自行研制了1个异构数据库信息互用系统。该系统采用以Web服务组件为中心的3层分布式体系结构,Web服务组件完成全局查询语句的分解、翻译等工作,将Web服务引入本系统大大提高了系统的可管理性、可伸缩性和可维护性。     

C/S和B/S相结合的安全型管理信息系统开发

为了开发基于C/S(客户/服务器),B/S(浏览器/服务器)模式的高校学生公寓管理系统的网络体系,在对C/S与B/S模式结构进行分析比较的基础上,针对该系统的建设目标和功能要求,对该系统进行了网络体系布置、数据库设计、系统框架设计和系统安全性设计,该系统的实施可以实现C/S和B/S模式结合起来开发管理系统的一种体系结构。     

Navigating a product landscape for technology opportunity analysis: A word2vec approach using an integrated patent-product database

Technology opportunity analysis has been the subject of many prior studies, although most of them have focused on discovering new technology ideas in a single narrow domain. This study proposes a product landscape analysis to identify product areas (i.e., potential technology opportunities) across multiple domains that firms can enter based on the technological capabilities embodied in their existing products. First, text mining is used to construct an integrated patent-product database from the United States patent and trademark database. Second, word2vec is employed to construct a product landscape as a vector space model where products with similar technological bases are located close to each other while maintaining the technological relationships. Third, given a product of interest, potential technology opportunities are identified via (1) automatic opportunity analysis that identifies product areas with technological bases similar to those of the product; and (2) interactive opportunity analysis that finds product areas based on experts’ queries modifying the technological bases of the product (i.e., addition and subtraction). Finally, ten quantitative indexes are developed to explore the implications of the potential technology opportunities identified. The case study covering 3,016,315 patents and 160,832 products confirms that the proposed approach is valuable as a creativity support tool for technology opportunity analysis in the era of convergence.     

Firm-Level TFP Growth in the Chinese Automobile Industry

China has been the world’s largest automobile producer since 2009,but it still lags behind other countries in terms of productivity. Based on theNational Bureau of Statistics of China (NBSC) firm-level data and the improvedapproach proposed by Ackerberg et al. (2015), this paper investigates thecontribution of total factor productivity (TFP) growth to the Chinese automobileindustry and evaluates the impact of firm entry and exit on TFP growth. Theempirical results show that the TFP of the Chinese automobile industry grows at10.7% per year. Joint venture and foreign-owned firms have a significantly higherTFP growth rate than others. Large-scale firms have a higher TFP growth rate thando small-scale firms, but the latter have caught up after 2004. Moreover, the entryof new firms and exit of old firms significantly improve the aggregate TFP growthrate.     

工业编组站MIS数据库设计

数据库设计是工业编组站MIS(管理信息系统)建设中的核心问题,为此,提出了适合工业编组站MIS的数据库结构和总体布局方案,以及两种数据库设计方案及最优方案选择原则。     

基于VC的网络数据库快速访问方法

网络数据库的快速访问对于网络服务应用很重要。本文分析比较了基于VC开发网络数据库访问的几种方法,在此基础上阐述了如何在VC 6. 0开发环境下采用ADO(ActiveXDataObject)技术开发网络数据库快速访问应用程序,并进行了实验,给出了实验结果。     

针织企业管理信息系统的设计及其优化研究

文章结合开发某针织企业管理信息系统的实践,对企业管理信息系统的设计、实现过程进行了探讨,对其性能的优化进行了必要的研究。该系统的实现产生了较好的经济效益和社会效益。     

基于嵌入式Linux的智能手机系统软件的设计与实现

介绍了一种基于嵌入式Linux的智能手机系统软件平台的设计与实现,系统软件从层次上分为四层．最底层是操作系统层,实现对嵌入式Linux的移植、裁剪;第二层是系统服务层,所有跟手机相关的业务都由此层来处理,以及数据库服务;第三层是中间层,嵌入式GUI实现人机交互接口,J2ME中间件支持java程序的下载、运行;最上层是智能手机应用层,实现手机的基本功能及其他应用。     

A flexible adaptation of the WIOD database in a virtual laboratory

ABSTRACT

The World Input-Output Database provides a time series of world input–output tables (WIOTs) that have been used for example to understand the manifold effects of the increased integration of markets through international trade. In order to enhance the flexibility of research on global trade issues using WIOD, we implement the WIOT workflow in a collaborative, cloud-based virtual laboratory environment. We demonstrate that a lab-based adaptation of WIOD is able (a) to continuously create and update versions of the WIOTs in a timely, consistent, and cost-effective way, (b) to enhance original information with accompanying information on standard deviations, and (c) to enable flexible re-casting of the entire WIOT time series into user-specific geographical and sectoral classifications.     

我国环保物联网发展的专利情报研究--以水处理领域为例

环保物联网专利是体现该领域技术创新的重要指标。本文基于Orbi专利检索和分析系统,以水处理领域的物联网应用为例进行中国专利统计分析,梳理我国环保物联网发展的现状和特点,为相关产业创新与发展提供有用的科技竞争情报。