视觉跟踪算法的研究进展     

李伟  吴瑰丽  王猛 《石家庄铁路职业技术学院学报》2013,(3)

目前,IT产业和高新技术领域的前沿之一是计算机视觉,而视觉跟踪算法是当前计算机视觉领域的研究热点。阐述视觉跟踪算法的国内外现状以及算法的分类,包括基于定位方法的分类、基于特征的分类、基于研究方法的分类,并探讨视觉跟踪算法的未来研究方向。  相似文献   

Using genetic algorithms to evolve a population of topical queries   总被引：1，自引：1，他引：0  

Rocío L. Cecchini  Carlos M. Lorenzetti  Ana G. Maguitman  Nlida Beatríz Brignole 《Information processing & management》2008,44(6):1863

Systems for searching the Web based on thematic contexts can be built on top of a conventional search engine and benefit from the huge amount of content as well as from the functionality available through the search engine interface. The quality of the material collected by such systems is highly dependant on the vocabulary used to generate the search queries. In this scenario, selecting good query terms can be seen as an optimization problem where the objective function to be optimized is based on the effectiveness of a query to retrieve relevant material. Some characteristics of this optimization problem are: (1) the high-dimensionality of the search space, where candidate solutions are queries and each term corresponds to a different dimension, (2) the existence of acceptable suboptimal solutions, (3) the possibility of finding multiple solutions, and in many cases (4) the quest for novelty. This article describes optimization techniques based on Genetic Algorithms to evolve “good query terms” in the context of a given topic. The proposed techniques place emphasis on searching for novel material that is related to the search context. We discuss the use of a mutation pool to allow the generation of queries with new terms, study the effect of different mutation rates on the exploration of query-space, and discuss the use of a especially developed fitness function that favors the construction of queries containing novel but related terms.  相似文献   

基于BP神经网络的手写体识别方法研究   总被引：1，自引：0，他引：1  

李勇 《安阳师范学院学报》2000,(4):42-46

基于一种改进结构的BP神经网络,探讨了神经网络应用于手写体文字识别的方法。除了对网络结构的改进外,还对网络的学习算法进行了改进,并应用进化计算理论,遗传算法与BP算法,提高了网络的训练速度和识别效果。  相似文献   

AN IMPROVED GENETIC ALGORITHM FOR TRAINING LAYERED FEEDFORWARD NEURAL NETWORKS   总被引：1，自引：0，他引：1  

《Journal of Zhejiang University. Science. B》2000,(3)

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高级语言教学如何取得良好的效果     

刘雅丽 《衡阳师范学院学报》1998,(3)

高级语言教学应将算法设计、语言语法、程序运行环境等有机地结合起来,以取得良好的教学效果。  相似文献   

考虑全文本内容的算法学术影响力分析研究     

王玉琢  章成志 《图书情报工作》2017,61(23):6-14

[目的/意义]从全文本内容分析的角度对算法的学术影响力进行分析。[方法/过程]以自然语言处理领域十大数据挖掘算法使用为例,分析不同算法在特定领域的影响力。通过对1965年-2006年间发表的自然语言处理领域10 922篇学术论文的调研,从其全文内容中抽取6 001条包含十大数据挖掘算法的句子（简称算法句）;针对算法句从提及论文数、总提及次数、提及位置等3个方面,对不同算法的影响力进行比较分析。[结果/结论]以不同特征作为影响力衡量标准,十大数据挖掘算法在自然语言处理领域学术论文中的影响力有明显区别,在基于论文数、提及数和提及位置的评估标准中,SVM算法表现出较高的影响力,Apriori算法的影响力则明显低于其他算法。本研究为量化评估算法的影响力提供了新思路。  相似文献   

Unravelling Data Journalism     

Eddy Borges-Rey 《Journalism Practice》2016,10(7):833-843

The centrality of data in modern society has prompted a need to examine the increasingly powerful role of data brokers and their efforts to quantify the world. Practices and methods such as surveillance, biometrics, automation, data creeping, or profiling consumer behaviour, all offer opportunities and challenges to news reporting. Nonetheless, as most professional journalists display a degree of hesitancy towards numbers and computational literacy, there are only limited means to investigate the power dynamics underpinning data. This article discusses the extent to which current data journalism practices in the United Kingdom employ databases and algorithms as a means of holding data organisations accountable. Drawing on semi-structured interviews with data journalists, data editors, and news managers working for British mainstream media, the study looks at how data journalism operates within the news cycle of professional newsrooms in the United Kingdom. Additionally, it examines the innovations data journalism brings to storytelling, newsgathering, and the dissemination of news.  相似文献   

动态规划法及其在矩阵链乘问题上的应用研究     

叶斌  孙红丽 《商丘职业技术学院学报》2006,5(2):50-52

动态规划法是求解最优化问题的一种方法,本文主要研究其求解问题的基本思想及具体步骤,详细分析其用于矩阵链乘问题上的算法设计,并给出其算法实现.  相似文献   

求解矩阵连乘最小乘法次数的一个自底向上算法     

苏旺辉  刘海涛  谢继国 《甘肃高师学报》2008,13(2):16-17

给出了一个求解矩阵连乘积的最优计算次序的自底向上算法,可以求出连乘矩阵的加括事情方式和最小计算次数.该算法的时间复杂度为多项式算法O（n3）.  相似文献   

基于集成学习的智能入侵检测系统     

常卫东 《中国科技信息》2006,(22):110-113

介绍了集成学习入侵检测系统设计的总体思路、总体结构和各模块功能,重点研究了基于遗传算法的集成学习分类引擎工作原理,通过仿真试验说明集成神经网络能克服单个神经网络的缺陷,具有高速数据处理与自学习功能.  相似文献