共查询到20条相似文献,搜索用时 78 毫秒
1.
针对复杂体制雷达辐射源信号(ARES)特征评估缺乏有效手段和层次分析决策(AHP)过多依赖专家经验的问题,提出了复杂体制雷达辐射源信号特征的集对模糊层次评价模型(SPA-FAHP)。通过引入三角模糊数对传统层次分析法进行改进,并对复杂体制雷达辐射源信号特征评价指标体系的指标权重作模糊层次分析,以解决对雷达信号大容量数据进行评估时评判者存在不确定或者模糊判断的问题;再引入集对分析(SPA)理论对传统层次分析的专家决策矩阵进行改进,并对特征评估决策矩阵作同一度分析,以解决传统层次分析决策时过多依赖专家经验的问题。最后联合指标权重矩阵和决策同一度矩阵实现对复杂体制雷达辐射源信号特征的综合评估。计算结果表明该模型有效可行,能够更客观地实现对复杂体制雷达辐射源信号特征的分析和评估。 相似文献
2.
提取有效的雷达辐射源信号特征是复杂体制下雷达辐射源信号识别的重要基础。为实现对复杂体制雷达辐射源信号特征的评价,提出了复杂体制雷达辐射源信号特征的模糊层次分析评价模型。该模型在构建复杂体制雷达辐射源信号特征评价指标体系的基础上,针对层次分析法在权重确定方面存在的不足,通过引入三角模糊数来刻画专家评判的模糊性,将该模型应用于雷达辐射源信号特征评价的算例分析,并将计算结果与标准层次分析法的分析计算结果进行了对比,结果表明该模型的计算结果与标准层次分析法的计算结果是一致的,从而证明了该模型的可行性和有效性。 相似文献
3.
4.
5.
基于聚集离散性与可分性的雷达信号特征评价 总被引:1,自引:0,他引:1
雷达辐射源信号脉内特征的好坏是决定雷达信号能否有效地加以区分的基础。为了定量地进行特征优劣的评价,提出了一种利用模糊度与贴近度来评估雷达信号脉内特征分布聚集离散性的方法。该方法首先对雷达信号脉内特征的空间分布进行分析;然后用模糊度的大小度量脉内特征的类内聚集性,用贴近度的大小度量脉内特征的类外分散性;并针对分类特征空间分布的重叠状态,采用类内类间距离和线性判别准则,提出了雷达辐射源信号脉内特征线性可分性指标。通过时频原子法提取5类雷达信号的两个脉内特征进行仿真实验,结果表明提出的方法和可分性指标是可行的。这为在雷达辐射源信号识别中定量地评价脉内特征提供了新的思路和途径。 相似文献
6.
7.
8.
9.
10.
辐射源信号高度密集、波形复杂、频域宽广、隐身和抗干扰能力强,复杂现代电子对抗信号环境下,雷达辐射源类型识别面临着严峻的挑战.论文总结了雷达辐射源类型识别技术的最新发展动态.针对特征提取和识别算法的现状、雷达辐射源信号数据海量、高维和递增的特点及特征参数随雷达工作参数和模式变化的特性,分析了雷达辐射源类型识别算法的不足.并且,为改进上述不足之处,提出了现代电子对抗信号环境下雷达辐射源类型识别的新流程,以进一步提高雷达辐射源类型识别的实时性和准确性. 相似文献
11.
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
12.
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
13.
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
14.
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
15.
16.
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
17.
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
18.
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
19.
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
20.
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