一种在轨海上多运动舰船目标检测和跟踪方法     

矫腾章  胡玉新  吕鹏  张凯  台宪青 《中国科学院大学学报》2020,37(3):368-378

传统遥感卫星图像处理采用在地面进行目标检测和跟踪处理的模式，卫星将拍摄到的图像数据下传至地面数据处理中心，由地面数据处理系统对接收到的遥感图像数据进行目标检测和跟踪。然而，随着遥感图像分辨率的不断提高，需要下传的数据量增大，导致星地数据传输的时间大大增加，最终造成目标检测和跟踪的时效性降低。针对上述问题，提出一种基于多特征量判别的Canny边缘检测和联合概率数据关联的在轨海上多运动舰船目标检测和跟踪方法。将该方法利用中国科学院微小卫星创新研究院的高分微纳卫星实测数据在模拟星载的嵌入式开发平台上进行验证，结果表明该方法能够在轨对海上多运动舰船目标进行快速、准确的检测和跟踪。  相似文献   

Word sense disambiguation based on context selection using knowledge-based word similarity     

Sunjae Kwon  Dongsuk Oh  Youngjoong Ko 《Information processing & management》2021,58(4):102551

In this paper, we introduce a novel knowledge-based word-sense disambiguation (WSD) system. In particular, the main goal of our research is to find an effective way to filter out unnecessary information by using word similarity. For this, we adopt two methods in our WSD system. First, we propose a novel encoding method for word vector representation by considering the graphical semantic relationships from the lexical knowledge bases, and the word vector representation is utilized to determine the word similarity in our WSD system. Second, we present an effective method for extracting the contextual words from a text for analyzing an ambiguous word based on word similarity. The results demonstrate that the suggested methods significantly enhance the baseline WSD performance in all corpora. In particular, the performance on nouns is similar to those of the state-of-the-art knowledge-based WSD models, and the performance on verbs surpasses that of the existing knowledge-based WSD models.  相似文献   

Exploring mechanisms of rapid automatized naming to arithmetic skills in Chinese primary schoolers     

Yiji Wang  Xiaolin Ye  Ciping Deng 《Psychology in the schools》2020,57(4):556-571

Rapid automatized naming (RAN) is associated with children's arithmetic performance, which is multifactorial by nature and consists of arithmetic fluency, arithmetic procedure, and word problems. Yet, it is unclear whether RAN can predict all key aspects of arithmetic skills independently and what cognitive mechanisms may explain this relation. Using a sample of Chinese primary school students (N = 170), results showed that while RAN was associated with all key aspects of arithmetic skills, the relations of RAN–arithmetic procedure and RAN–word problems may be dependent on that of RAN–arithmetic fluency. Supporting the processing speed hypothesis, results further suggested that processing speed may underlie the relation between RAN and arithmetic performance. Findings made unique contribution to understanding the effect of RAN on arithmetic performance and cognitive mechanisms that may underpin this association in the context of Chinese culture.  相似文献   

Complex phonological tasks predict reading in 7 to 11 years of age typically developing Russian children     

Svetlana V. Dorofeeva  Anna Laurinavichyute  Victoria Reshetnikova  Tatyana V. Akhutina  Wim Tops  Olga Dragoy 《Journal of Research in Reading》2020,43(4):516-535

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Blog--图书馆发展的新契机   总被引：24，自引：1，他引：24  

刘晓穗 《情报科学》2004,22(10):1188-1190,1199

本文从介绍网络上一种的信息载体Blog入手．阐述Blog产生的背景和功能特点，分析其巨大的应用潜能和社会影响，探究Blog在图书馆的应用及其对图书馆发展的促进作用．为新技术在图书馆的应用开启新的思路。  相似文献   

图书馆流通数据仓库的设计与实现     

胡根桥 《现代情报》2007,27(7):68-70

本文首先阐述了数据仓库的思想，并讨论了图书馆流通系统建立数据仓库的必要性，接着通过具体的例子分析了图书馆流通系统数据仓库的设计过程，从而实现数据仓库技术在图书馆流通系统中的应用，并通过具体的实例展示对流通系统数据仓库进行联机分析的结果。  相似文献   

网络经济环境下中国邮政的战略选择     

苑春荟  左震林  梁雄健 《中国软科学》2002,(6):49-53

网络经济的全新环境给中国邮政的发展带来了诸多的机遇和挑战，在此背景下通过对邮政通信网络，业务体系，组织管理等若干要点的分析，指明中国邮政的优势与不足，并通过对邮政原有的管理模式和生产流程进行深入剖析，提出改革邮政管理模式与生产流程的设想和实施,指明电子邮政是中国邮政在新的网络环境下可持续发展的战略选择。  相似文献   

一种有效的数据仓库定制应用方式     

王国友  王命延 《科技广场》2004,(8):27-29

本文介绍了如何利用DELPHI中的数据仓库组件开发数据仓库应用系统，为用户提供一种有效的定制的数据仓库应用方式，利用此组件可进行灵活的多维数据分析。  相似文献   

邮政企业实施商业化经营的可行性分析     

张凌  陈洪彬 《科技与管理》2002,4(1):51-52

邮政与电信分营后，邮政企业面临着市场经济的严峻挑战。针对邮政企业实施商业经营的可行性进行分析，提出了今后邮政企业实行商业化经营的阶段性措施。  相似文献   

结构化语言知识库在自然语言处理中的应用   总被引：1，自引：0，他引：1  

刘海涛 《情报科学》1992,13(5):44-49

本文讨论了知识在自然语言处理中的作用和现有系统的局限,引入一种全文结构知识库的概念并探讨了此知识库在自然语言处理中的诸多应用问题。  相似文献