树形图在英语句子结构分析中的应用

利用树形图来分析英语句子结构是一种比较新颖的分析方法。它是句法学中分析句子结构的方法之一。通过树形图的说明,除了句子结构成分之间的文法关系得以清楚呈现之外。模棱两可的句子结构也可得到更好的解析。     

A Comparative Study of Water Imagery in the Chinese Poem Happy Rain on a Spring Night and American Poem A Drop Fell on the Apple Tree

This essay directs at the water imagery of two poems Happy Rain on a Spring Night and A Drop Fell on the Apple Tree.Although living in different time and place, Chinese poet Du Fu and American poetess Emily Dickinson share some deep understanding of the water. This secret of water imagery is unveiled in this essay with the help of Archetypal Criticism, revealing its significance to the human beings as a race.     

基于树模型回归算法在预测问题中的研究

首先介绍基于树模型的两种回归算法,通过在Weka平台上实验所得数据,对该模型下的这两种算法的预测性能给予评估。     

Trees as natural barriers against heavy metal pollution and their role in the protection of cultural heritage

Leaves of common deciduous trees: the horse chestnut (Aesculus hippocastanum) and linden (Tilia spp.) from the park, near one of the most important cultural institutions, the National Library of Serbia, were studied as bioaccumulators of heavy metal (Cr, Fe, Ni, Zn, Pb, Cu, V, As and Cd) air pollution. The leaf samples were collected from the urban park exposed to the exhaust of heavy traffic. The May–September heavy metal accumulation in the leaves, and their temporal trends, were assayed in a multi-year period (2002–2006). Comparing the obtained concentration of the investigated elements from the beginning to the end of growing seasons, a significant rate of accumulation was determined for a majority of measured elements, and it was concluded that these tree species (horse chestnut and linden) can be used as bioaccumulators of the investigated heavy metals. The SEM-EDAX analysis of individual particles deposited on the leaves showed that the 50–60% belong to a class of fine particles (D < 2 μm), mainly of anthropogenic origin. Thus, the investigated tree species could be grown as a natural barrier against urban air pollution in the vicinity of libraries, museums and other buildings for cultural heritage storage.     

改进ID3算法在管道腐蚀检测系统中的应用研究

ID3算法计算速度较快、容易实现并且适用于处理规模较大的学习问题,但其较倾向于选择取值较多的类别,从而导致丢失全局最优解。提出一种改进的ID3算法,并将其应用于管道腐蚀检测系统中,研究结果表明,改进后的算法具有较高的可信度。     

基于分类树和支持向量机的个人信用评估方法

通过对分类树和支持向量机这两种方法在个人信用评估领域的适用性分析,提出了一种将分类树和支持向量机结合起来处理个人信用评估的新方法．用该方法处理含有混合数据的个人信用评估实例,结果表明,该方法有效地提高了整个模型的训练精度和测试精度．     

Flash课件平台组件技术研究

主要介绍了现今教育教学领域使用的主流课件技术,并详细描述了其中一种常见组件——Tree组件的应用方法。以Tree组件产生的效果作为切入点,由浅入深地对该组件及相关技术进行了阐述。     

数据挖掘中决策树分类算法的研究与改进

决策树分类算法是数据挖掘中一个重要的内容,而ID3算法又是决策树分类算法中的一种重要方法且被广泛应用。然而在实际应用过程中,现存的决策树算法也存在着很多不足之处,如计算效率低下、多值偏向等。为了解决这些问题,提出了一种基于ID3算法的加权简化信息熵算法,它提高了决策树的构建速度,减少了算法的计算运行时间,同时也克服了ID3算法往往偏向于选择取值较多的属性作为测试属性的缺陷。并且随着数据规模的增大,决策树的分类性能表现得越好。     

基于二叉树的平面连杆机构运动仿真及软件开发

将平面连杆机构的二副杆、三副杆、机架等构件定义为机构二叉树的结点集合,通过定义构件的联接规则,将机构表示为二叉树数据结构,其中树的节点和左、右孩子包含了连接副和构件几何参数等信息。通过对二叉树的后序遍历算法建立了平面连杆机构运动分析方法,采用面向对象技术开发了平面连杆机构运动仿真软件,实现了平面连杆机构的运动分析与仿真,仿真算例表明了该方法的有效性。     

一种新型整数集上的动态统计数据结构——Irie

阐述了一种改进自Trie树的新型数据结构,支持对整数集的各种动态统计操作,该结构容易实现,并且有着简明的定义和令人惊叹的运行速度,以及简单的正确性和时间效率证明。