Artificial neural networks with feature transformation based on domain knowledge for the prediction of stock index futures

A feature transformation method based on domain knowledge for arti?cial neural networks (ANNs) is proposed. The method of feature transformation based on domain knowledge converts continuous values into discrete values in accordance with the knowledge of experts in speci?c application domains. This approach effectively ?lters data, trains the classi?er, and extracts the rules from the classi?er. In addition, it reduces the dimensionality of the feature space, which not only decreases the cost and time in the operation but also enhances the generalizability of the classi?er. The experimental results of the proposed approach will be compared and tested statistically with the results of the linear transformation method. The results show that the method of feature transformation based on domain knowledge outperforms the linear transformation in modelling of ANNs. Copyright © 2004 John Wiley & Sons, Ltd.     

The service sector of Cuba: An analysis and critique

The Cuban economy has experienced a significant increase in foreign direct investment over the past decade due to the end of the Soviet Union and the establishment of more liberal trade policies. Although the U.S. embargo of trade with Cuba still exists, there has been movement lately that suggests the end of the four‐decades‐old policy. The purpose of this article is to analyze the current Cuban business environment and to identify potential entrepreneurial opportunities in the service sector. Major trade partners are also reviewed and managerial implications discussed. © 2006 Wiley Periodicals, Inc.     

通用弹药条码系统在物流工程的应用

分析了条码技术的发展及二维条码技术在弹药领域应用的前景,重点介绍了弹药条码系统的组成与使用,初步确定了通用弹药保障的信息化模式。     

等截面斜腿刚构桥的几何布局优化

以应力平方均值最小为优化目标，建立了跨越V形谷的等截面斜腿刚构桥在列车荷载和自重共同作用下的布局静力优化的数学模型，采用直接搜索法进行了设计变量的寻优。     

一种城市物流分区配送方法的研究

提出了基于区位理论的城市物流分区配送的数学模型和算法实现方法，实验证明。该方法具有计算效率高，求解精度适中的特点。     

贸易引力模型对东北亚五国的实证检验及贸易潜力分析

近些年,东北亚国家的贸易问题,一直受到许多学者的关注.贸易引力模型从实证角度分析,验证了决定东北亚各国2003年双边贸易状况的主要因素是:贸易伙伴的经济规模(GDP)、空间距离、人口和制度安排.对东北亚各国之间应有贸易额进行估计,以发掘东北亚各国之间的贸易潜力.     

中国劳动力市场的二元分割及其就业效应

我国的劳动力市场既有经济转型时期的非规范性，又有发展中国家二元经济和二元社会结构的特征，存在二元四级分割的情况。运用哈里斯-托达罗模型及成本-收益分析方法，可以考察我国二元四级市场上的劳动力流动状况及其就业效应。     

从制度安排看我国东西部发展差异

制度对经济增长的影响主要从区域政策与制度创新两方面来体现.造成我国东西部发展存在差异的原因很多,制度安排上存在的差异是其重要原因.因而通过制度创新缩小东西部制安排上的差异是弥合东西部发展差异的重要举措.     

实施人才资源开发策略提升企业核心竞争力

随着知识经济全球化时代的到来,人才资源成为第一资源和核心竞争力。本文就人才资源的开发策略进行研究探讨,对职业生涯管理、知识管理、组织文化、学习组织等具体开发战略进行剖析,为企业提高人才配置效率和核心竞争力提供支持。     

试论住宅商品化的支撑体系

本文从住宅商品化内涵分析入手,针对当前我国住宅商品化进程中存在的主要问题,提出并论述了由四个基本内容构成的住宅商品化支撑体系①观念支撑;②价格支撑;③金融支撑;④市场支撑.通过对这一问题的深入探索,以期对我国的住宅商品化和住房制度改革有所裨益.