中国货币供给内生性或外生性问题的实证

研究货币理论中关于货币供给的内生性或外生性问题．在向量自回归模型基础上，通过格兰杰因果检验对我国货币供给的内生性或外生性作了实证检验．结果表明，我国的货币供给具有较强的内生性质，这意味着以货币供给为操作目标的货币政策对经济的调节作用有很大局限性．因此，货币当局应采取有效措施，切实解决货币供给的内生性问题．     

Automatic Data Extraction from Websites for Generating Aquatic Product Market Information

The massive web-based information resources have led to an increasing demand for effective automatic retrieval of target information for web applications. This paper introduces a web-based data extraction tool that deploys various algorithms to locate, extract and filter tabular data from HTML pages and to transform them into new web-based representations. The tool has been applied in an aquaculture web application platform for extracting and generating aquatic product market information. Results prove that this tool is very effective in extracting the required data from web pages.     

一个适用于地理信息系统的数据挖掘工具——GISMiner

论文将常用于关系型、事务型数据库的面向属性归纳的方法和关联规则挖掘方法扩展至空间数据库，开发了适用于地理信息系统（GIS）的空间数据挖掘工具－GISMiner，并将其应用于从农田GIS中挖掘农田使用情况的空间特征规则，以及从农产品市场GIS中挖掘农产品价格与铁路、国道和河流间的空间关联规则实验。结果表明，GISMiner是一个实用的、能适应于GIS且能挖掘多种知识类型的数据挖掘工具。