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分布式PACS相对于基于DICOM网络的传统PACS在系统结构和性能上有较大改进,但DICOM标准的专业性和复杂性严重阻碍了分布式PACS性能的提升。DICOM图像存取服务屏蔽了底层DICOM通讯协议和数据结构的复杂性,并通过为分布式PACS中的上层服务和外部应用提供一套IDL接口和访问机制来完成对DICOM图像文件中各类数据的访问,较大地提高了分布式PACS系统的开放性和互联互操作性。 相似文献
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基于数据挖掘的PACS智能辅助诊断模型研究 总被引:1,自引:0,他引:1
随着PACS系统在我国各医院的普及,如何高效利用存储于PACS数据库中海量信息,从中获取有价值的和隐含的知识已经成为当前PACS应用的新热点。将数据挖掘技术与PACS系统相结合,对基于数据挖掘的智能辅助诊断模型进行研究,给出模型的构造框架,并对模型功效进行分析和评估。 相似文献
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KBASE—P是一个知识库程序设计语言.它以KBASE作为查询语言,以FD—PROLOG为过程性的宿主语言.二者具有相同的编程风范,都是Horn子句风范,并且系统对任何磁盘数据访问都是以“每次一个集合”的方式进行,因此在KBASE—P中.查询语言与宿主语言之间的“阻抗不匹配”问题尽可能地减小了.KBASE—P以RDBMS来管理事实(包括中间求值结果)和规则,因此能够有效地管理大容量的数据,并且数据是可共享的,适合于处理大规模的知识密集型应用.本文介绍了KBASE—P语言及其特点,并与相关的系统进行了比较. 相似文献
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基于Quorum系统容错技术综述 总被引:4,自引:0,他引:4
Quorum系统是一种新型冗余拓扑的集合系统。在“冗余”设计的基础上,quorum通过交叉的结点把有效数据复制到其他quorum的结点中,增加了Quorum系统数据冗余性。当某些结点发生故障或者错误时,通过选举协议,从含有故障结点quorum的有效结点中选举出有效数据;或者采用互斥协议,从不含故障或者错误结点的有效quorum的结点中获得有效数据,系统仍能可靠运行。分析了各种Quorum肌系统的容错方式、性能比较,探讨了Quorum系统发展中需要改进的关键问题,并展望了未来的研究方向。 相似文献
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数据依赖与异常数据分离-应用 总被引:2,自引:1,他引:1
数据在传递过程中,经常出现两类现象:一些被传递的数据在传递中发生部分数据元丢失;一些未知的数据元入侵到被传递的数据内。这两类现象使得被传递的数据出现“异常”。利用一个新的数学模型,给出两类现象的理论研究与应用。这个新的数学模型是P集合(packet sets) , P-集合是由内P集合XF(internal packet set XF)与外P集合XF (outer packet set XF)构成的集合对;或者,(XF,XF)是P集合。给出数据的F依赖、F依赖的概念与特性,提出数据的依赖定理,给出异常数据被分离的应用。数据依赖是P集合诸多应用特性之一。P集合是研究动态数据系统的一个新理论与新方法。 相似文献
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S. Shaw 《Journal of Computer Assisted Learning》1993,9(2):93-99
Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained. 相似文献
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European Community policy and the market 总被引:1,自引:0,他引:1
C. Lloyd 《Journal of Computer Assisted Learning》1993,9(2):86-91
Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven. 相似文献
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融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。 相似文献
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Wayne O’Brien Author Vitae 《Journal of Systems and Software》2008,81(11):1997-2013
Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them. 相似文献
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This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives. 相似文献
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潘丽 《自动化与仪器仪表》2014,(7):80-82
自然界的绝大部分信号都是以模拟的形式存在,因此模拟信号的采集转换存储在数字时代十分关键。文章讨论了在雷达信号处理领域基于AD9626的AD采集存储卡的设计原理、硬件结构和程序设计与芯片配置等问题,为今后相关领域的研究提供了可参考的方案。 相似文献
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Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what
is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic
sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and
its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of
an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify
robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can
or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest.
This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January
31–February 2, 2008 相似文献
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张涛 《计算机测量与控制》2015,23(1):86-89
为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值. 相似文献
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Jacob Palme 《Software》1979,9(9):741-747
The COM teleconferencing system was designed to be easy to use for both beginners and people with much computer experience. A number of design choices in organizing the human-computer interface were considered very carefully. These design problems are not unique for teleconferencing applications, but will appear in many other developments of human-computer interfaces for non-computer specialists. This report discusses naming conventions, menu format, user commands, help facility and the treatment of ‘type ahead’ from the users. 相似文献