共查询到19条相似文献,搜索用时 46 毫秒
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激光防护镜防护性能测试方法国家军用标准研究 总被引:1,自引:0,他引:1
制定了与人眼生理卫生防护要求有关的《激光防护眼镜防护性能测试方法》国家军用标准。本标准适用于研制、生产、装备和使用中的吸收、反射和复合式激光防护眼镜及军用设备窗口材料的防护性能测试。 相似文献
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与传统激光告警设备相比,多功能激光告警设备的信号类型及通道数量大幅增加,信号处理的复杂度增加。为了实现多功能激光告警设备的信号处理功能,对主要信号特征进行了阐述,提出了抗干扰处理、信号通道识别等信号处理技术。通过硬件及软件算法设计,该技术能够满足多功能激光告警设备的技术要求,对工程实践具有重要指导意义。 相似文献
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V. A. Komotskii Yu. M. Sokolov E. V. Basistyi 《Journal of Communications Technology and Electronics》2012,57(7):751-754
A new mechanical modulator of laser radiation is proposed. The working principle is based on the specific diffraction of coherent radiation by a deep reflection grating with rectangular profile. The modulator can be used in various wavelength ranges. 相似文献
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由于面临越来越严重的激光制导武器的威胁 ,对来袭威胁进行早期预警日趋重要。概要介绍了微弱激光辐射探测技术国外研究现状及发展趋势。对微弱激光辐射探测关键技术进行了研究探讨。 相似文献
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Software-implemented EDAC protection against SEUs 总被引:1,自引:0,他引:1
In many computer systems, the contents of memory are protected by an error detection and correction (EDAC) code. Bit-flips caused by single event upsets (SEU) are a well-known problem in memory chips; EDAC codes have been an effective solution to this problem. These codes are usually implemented in hardware using extra memory bits and encoding/decoding circuitry. In systems where EDAC hardware is not available, the reliability of the system can be improved by providing protection through software. Codes and techniques that can be used for software implementation of EDAC are discussed and compared. The implementation requirements and issues are discussed, and some solutions are presented. The paper discusses in detail how system-level and chip-level structures relate to multiple error correction. A simple solution is presented to make the EDAC scheme independent of these structures. The technique in this paper was implemented and used effectively in an actual space experiment. We have observed that SEU corrupt the operating system or programs of a computer system that does not have any EDAC for memory, forcing the system to be reset frequently. Protecting the entire memory (code and data) might not be practical in software. However this paper demonstrates that software-implemented EDAC is a low-cost solution that provides protection for code segments and can appreciably enhance the system availability in a low-radiation space environment 相似文献