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激光敌我识别及其对抗技术 总被引:4,自引:0,他引:4
李东源 《光电对抗与无源干扰》2001,(4):4-6
本文介绍了激光敌我识别技术的工作原理和可能的编码方式,对激光敌我识别的对抗技术进行了初步探讨。 相似文献
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分析了MarkXIIA敌我识别系统和激光敌我识别系统的现状,提出了射频与激光组合识别方案。该方案综合利用激光指向性高和Mark XIIA系统识别能力强的优点,通过并行使用射频询问射频应答工作方式和激光询问射频应答工作方式,避免了来自射频询问主波束内的多目标应答问题,在具备多目标处理能力的同时,提高了对密集目标中点目标的敌我属性识别能力。该方案也为单兵提供了可行的敌我识别手段。最后,论述了该方案的实用性,以期为新型敌我识别系统的设计提供参考。 相似文献
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激光敌我识别技术及发展 总被引:2,自引:0,他引:2
现代战场,敌我目标识别系统发挥了重要的作用,激光敌我识别技术以其独特优势日益受到重视。本文简要阐述了几咱激光敌我识别系统的组成及工作原理,并论述了敌我识别技术的发展趋势。 相似文献
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雷达敌我识别干扰方法研究 总被引:1,自引:0,他引:1
雷达敌我识别系统用来识别雷达发现目标的敌我属性,它的基本原理是询问机发射射频脉冲询问信号给应答机,应答机收到后自动发回应答信号完成敌我识别;雷达敌我识别干扰则是利用己方的雷达敌我识别对抗装备对敌方的雷达敌我识别系统实施电子干扰的作战行动。文章通过阐述基本工作原理、分析典型信号特征,介绍了雷达敌我识别系统;针对其存在的弱点,分析了雷达敌我识别干扰的可行性;结合已有研究成果和可行性分析,探讨了压制性干扰、欺骗性干扰和灵巧干扰的方法,对雷达敌我识别对抗技术的深入研究具有一定的意义。 相似文献
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胡鹰 《电气电子教学学报》2007,29(2):31-32
效率和功率因数是电气与电子工程中的两个重要参数.它们既是两个不同的概念,又有密切的联系.但在目前的电路分析及模拟电子技术的部分教材中,关于效率、功率因数及其关系问题仍然存在一些错误概念,或者对这些重要的问题言之甚少.本文针对上述问题作了详细地讨论.并通过一个例子分析了效率及功率因数之间的关系,纠正了对这些问题的模糊认识,使这些概念更加明确.笔者认为文中的分析和讨论对电类各专业的学生掌握这些基本问题是有益的. 相似文献
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讨论了紫外防护品(眼镜、防晒护肤品、织物)的防紫外检测原理,建立了实用的检测装置,对样品旋转不同的角度进行测试,测试结果与日本岛津UV-3150紫外分光光度计的测量结果比较,具有良好的一致性.检测11种不同类型的镜片,结果表明大多数镜片均能限制UVB(280~320 nm)的透过,但UVA(320~400nm)的透过率较高,镜片的防紫外线能力不理想.采用紫外吸光度法检测6种防晒护肤品,根据吸光度A值的大小,评价产品的性能,3种化妆品实测防紫外效果与产品标定的SPF值不相吻合,并且UVA的透过率较高.检测14种织物,计算得到织物防紫外指数UPF值,发现染色深及较厚的织物防紫外效果较好,纯棉及亚麻防紫外线效果较差.三种紫外防护品对UVB的防护效果都优于对UVA的防护,但UVA对人体同样造成伤害,应引起人们的重视. 相似文献
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本文简要叙述了科学技术转化为现实生产力的三个环节,即科研成果、科研成果的生产化和推广。重点总结了后两个环节在我国改革以来的进展及成功的经验,并提出存在的问题及今后工作建议。 相似文献
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B.S. Dhillon 《Microelectronics Reliability》1989,29(3)
This paper briefly reviews human errors in engineering systems. Definitions for human reliability and human errors are presented. Consequences and causes of human errors are discussed. Historical developments in human reliability are briefly described. Breakdowns of human errors are given. Human error prevention and reduction methods are discussed along with human reliability data banks. In particular, Data Store and Operational Recording and Data System (OPREDS) are described. Human errors in structures and computer systems are discussed. Error rates for selected tasks are presented. 相似文献
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Effects of error in code transition levels on nonlinearity and effective number of bits (ENOB) of an analog to digital converter (ADC) are presented in this article. Error in code transition level is determined by deviation of code transition levels from the mean of the estimated code transition levels. Errors in estimate of differential nonlinearity (DNL), integral nonlinearity (INL) and ENOB are computed by considering error in code transition levels and computing corresponding values. In this study, 5- and 8-bit ADC transfer characteristics are simulated and arbitrary nonlinearity errors are introduced. Suitable corrections are applied in code transition levels and computation of estimate of nonlinearity with and without corrections are reported. Results have been compared with earlier published work and improvements are observed. Effects of overdrive and additive noise on ENOB for 5-bit ADC are also reported. 相似文献
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Telecommunications in the US is undergoing a revolution. Corporations are attempting to leverage their competencies in the deregulated environment in order to enhance their competitive position. While the eventual results of this flurry of partnerships that has recently occurred are uncertain, there are certain trends that are becoming increasingly apparent. This paper represents an essay on the telecommunications industry (or its converging associated industries) and describes its history and evolving structure. Fifty-four partnerships are examined in an attempt to systematically examine an industry in transition. Key implications of these partnerships are also discussed. 相似文献