排序方式: 共有13条查询结果,搜索用时 7 毫秒
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介绍了如何在兼容ARM V4指令集的32位RISC处理器(FA526)所构建的SoC平台上(即FIE8100),运用智原科技所提价的FA526-Linux开发包通过armboot装载Linux操作系统。使开发人员可以在基于FIE8100 SoC的仿真平台-MediaCreative!在进行二次开发和验证的设计方法。 相似文献
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本文介绍了增益可编程控制放大器芯片AD526,以及在Win2000操作系统下如何使用计算机的并行接口控制可编程放大器,实现信号放大的自动控制。 相似文献
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基于可编程放大器AD526和模数转换器AD574,设计并实现了一种具有较高精度的应用于虚拟示波器的数据采集系统,对系统的电路设计进行了理论分析并完成了相应的实验。实验测试结果表明:该数据采集系统具有精度高、速度快、适应于不同幅度信号采集的优点,有较好的应用价值。 相似文献
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Hartel PG Hagedorn C McDonald JL Fisher JA Saluta MA Dickerson JW Gentit LC Smith SL Mantripragada NS Ritter KJ Belcher CN 《Water research》2007,41(16):3629-3642
Fluorometry identifies human fecal contamination by detecting optical brighteners in environmental waters. Because optical brighteners are sensitive to sunlight, we determined if we could improve fluorometry by exposing water samples to ultraviolet (UV) light to differentiate between optical brighteners and other fluorescing organic compounds. Optical brighteners were likely present when the relative percentage difference in fluorometric value of the water before and after UV light exposure was >30% (glass cuvettes, 30 min exposure) or >15% (polymethacrylate cuvettes, 5 min exposure). In a blind study, we correctly identified the presence or absence of optical brighteners in 178 of 180 (99%) of the samples tested with a more expensive field fluorometer and in 175 of 180 (97%) of the samples tested with a less expensive handheld fluorometer. In the field, the method correctly identified two negative and three positive locations for human fecal contamination. When combined with counts of fecal bacteria, the new fluorometric method may be a simple, quick, and easy way to identify human fecal contamination in environmental waters. 相似文献
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基于ITU-R P.526-11建议书中的电波传播模型,将传播路径上的地形遮挡视为单仞峰,主要考虑自由空间传播和地形绕射带来的传输损耗,基于数字高程模型提供的地理信息数据,预测了用于地空通信的地面通信站覆盖范围,一定程度上可以辅助进行地面通信站的选址;在地面站实际使用过程中,依据预测的覆盖范围,可以让使用人员对通信的通断心中有底。 相似文献