爱国主义教育应从民风民俗中加深民族认同感

爱国主义情感实际上就是民族认同感。我们不能指望从课堂中培养学生的民族认同感。应该从传统文化中、从生活实际中、从民风民俗中领悟中华民族的特征。通过旅游寻根、祭典祖先、解读家谱和考察节日,可以使青少年一代感受到强烈的民族认同感,以弥补学校教育的不足。     

面向广域网的服务发现机制

提出了一种新的用转发服务请求方法实现面向广域网的服务发现机制RFSD。分布在广域网中的服务器结点组成一个树结构,每个结点保存其父、兄弟和子等相邻结点的地址;服务请求传输报文中附加一定的转发信息。每个结点收到服务请求时,首先对其进行匹配操作,在满足的情况下响应服务请求,在不满足的情况下对附加信息进行处理,并将服务请求转发到某个相邻结点,这种方法可以有效地实现广域网中的服务发现。     

Urban forest and environmental inequality in Campos dos Goytacazes,Rio de Janeiro,Brazil

Social and spatial inequality regarding environmental resources and services is one of most complex issues affecting contemporary urban life. The objective of this research is to study the spatial distribution of trees in public areas in Campos dos Goytacazes, Rio de Janeiro, Brazil. This research presents data gathered in ten neighborhoods in Campos. These neighborhoods were split into three distinct groups using wealth levels. Data obtained include the number of trees and private gardens and tree species diversity per neighborhood street. Our results demonstrate that the wealthier neighborhoods have both the highest tree biodiversity and number of trees. In contrast, the poorer neighborhoods present a low biodiversity level and fewer tree species. Our results also showed that age of the neighborhoods was not a factor in explaining the number of trees in public spaces. Socioeconomic and education levels of the population seem to play a more causal on tree quantity and species diversity. This inequality stresses a problem with environmental justice, a characteristic of Brazilian cities intrinsically connected to urban sustainability.     

Modified classification and regression tree splitting criteria for data with interactions

This paper proposes modified splitting criteria for classification and regression trees by modifying the definition of the deviance. The modified deviance is based on local averaging instead of global averaging and is more successful at modelling data with interactions. The paper shows that the modified criteria result in much simpler trees for pure interaction data (no main effects) and can produce trees with fewer errors and lower residual mean deviances than those produced by Clark & Pregibon's (1992) method when applied to real datasets with strong interaction effects.     

完全二叉树的实时判别方法

根据二叉树的层次遍历原则,设计了一种在遍历二叉树的过程中实时判别完全二叉树的简便方法.     

A Matrix-Based Approach to Uncertainty and Sensitivity Analysis for Fault Trees1

System unavailabilities for large complex systems such as nuclear power plants are often evaluated through use of fault tree analysis. The system unavailability is obtained from a Boolean representation of a system fault tree. Even after truncation of higher order terms these expressions can be quite large, involving thousands of terms. A general matrix notation is proposed for the representation of Boolean expressions which facilitates uncertainty and sensitivity analysis calculations.     

两种数据挖掘技术在预测顾客满意度中的对比研究

分类发现是数据挖掘的重要内容,贝叶斯分类和决策树在数据挖掘中应用相当广泛,它们是生成分类器的两种有效方法。文章分别用两种方法对顾客满意度进行分类及预测,并将两种方法进行比较分析,认为用决策树分类法来预测顾客满意度具有简洁、高效等特点。     

本金无风险的外汇结构性存款的期权特征及其定价

文章首先提出了外汇结构性产品的概念和分类,分析了本金无风险的外汇结构性存款的期权特征及其收益的不确定性。接着用二叉树定价法对其定价,最后探讨了相应的投资风险。认为本金无风险的外汇结构性存款有其投资价值,但由于其价值与标的资产挂钩,因此也存在着一定的投资风险。     

一种多约束条件的组播路由算法

提出了在组播应用中满足多个约束条件的一种组播路由算法。该算法以最短路径算法为基础,通过调整当前形成的路由树中节点的排列顺序,依次为目的节点选择到路由树的最短路径并加入到该路由树中,得到满足跳数约束条件的低代价组播树,再对所构成的低代价组播树进行同级中继合并,得到最后的组播树。该组播树因为中继最少,所以时隙资源消耗最小。