Waveform design and generation is one of the key techniques in uwb - sar development . with an air - borne uwb - sar system as the background , the foundational theory of lfm signal , the systemic error model and the design and implementation of lfm generator were discussed in this paper . the paper is composed of four parts : first , the foundational theory of lfm ( linear frequency modulated ) signal was studied 超宽带信号的产生方法和系统设计是实现超宽带合成孔径雷达的一项关键技术,本文以机载合成孔径雷达系统的研制为背景,讨论了线性调频信号的基本理论、基于数字技术产生线性调频信号的方法及其误差模型、系统的设计实现技术及系统性能的测试和评估等内容,全文分以下四部分: ?第一部分主要讨论了线性调频信号的基本理论。
The wide use of network intrusion - detection systems ( nids ) requires efficient test and evaluation technique to assess the quality of these systems . the efficient test and evaluation is not only beneficial to the improvement of product quality for manufactures , but also helpful to the choice of appropriate devices for users 随着网络入侵检测系统的广泛应用,对其进行测试和评估的要求也越来越迫切,开发者希望通过测试和评估发现产品中的不足,用户希望通过测试和评估来帮助自己选择合适的网络入侵检测产品。
In this dissertation , by virtue of self - developed test system , the studies on the optical and electric properties of oled of little molecule with different material , configuration manufactured with different processes have been presented . concepts of chromatics and the mechanism of carrier transportation in the semiconductor device have been applied here to qualitatively analysis and interpret the result of measurement . some interesting conclusions have been given which will be helpful in the further optimization of the performances of oled 在oled研究过程中,对器件性能的表征工作起到十分重要的作用,本文利用自主开发的测试平台(包括软件、硬件的搭建) ,对不同材料、结构、工艺的小分子oled器件进行了光学、电学性能的测试和评估,并依照色度学、半导体电输运等理论成功的对测试结果作出了定性分析,揭示了制约器件工作性能的相关因素,为器件性能的进一步优化奠定了基础、指明了方向。
Solar array simulator is programmed in labview to simulate the running condition of satellite ( such as sun angle , shadow time , orbit and so on ) . electronic load is programmed in labview to simulate the running condition of satellite load . by data collecting and processing , satellite power engineers can monitor and evaluate working condition of satellite power system 该测试评估系统应用labview软件对太阳能电池阵列模拟器进行编程,模拟太阳能电池在空间各种状态下(轨道、光照角、进出阴影等)的情况;对电子负载进行编程,模拟卫星负载的各种变化(平均负载、短期负载和脉冲负载)情况,信号采集和数据处理单元在测试评估系统运行过程中记录电源系统各组成部分的工作参数,据此对卫星电源系统进行测试和评估。
测试: test; testing; checkout; mea ...和: mix; blend评估: estimate; assess; appraise开发测试和评估: dt&e development test and evaluation初始运行测试和评估: iot§e initial operational test and evaluation原始操作测试和评估: iot&e initial operational test and evaluation通过测试和评估持续地改进系统: continually improving the system through measurement and evaluation语言测试和评价: examinations and assessment系统测试和评价计划: system test and evaluation plan反馈和评估: feedback and evaluatino和评估方法: evaluation measures监测和评估: m&e monitoring and evaluation试验和评估: t&e test and evaluation测试和实现: the isample interface its tests and its implementations测试和置位: test and set分析和评估司: division of analysis and assessment预警和评估司: division of early warning and assessment测试和控制台: test and control boardglasgow昏迷测验和评估: glasgow coma testing and evaluation环境信息和评估司: division of environmental information and assessment监测和评估委员会: monitoring and assessment committee经济监测和评估股: economic monitoring and assessment unit景观计划和评估: landscape planning and assessment心血管检查和评估: cardiovascular examination and evaluation眼的检查和评估: ophthalmic examination and evaluation