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watermarkt1
- 基于小波零树特性的视觉感知度模型的优化方案, 给出了两种水印算法: 一种算法嵌入的是高斯序列水印, 通过相关检测实现盲检测 另一种算法嵌入的是二值图像水印, 水印的提取是非盲提取。这两种算法在所有重要小波系数( 包括最低频系数) 中嵌入水印, 以达到最大化水印嵌入量的目的, 并结合感知度模型在水印的透明性和鲁棒性之间实现了较好的平衡, 对于常见的图像处理操作, 特别是对于JPEG 和小波压缩均有较好的鲁棒性。-based on wavelet zerotree visual perception
watermaking
- 一个用DCT的数字水印毕业论文。本文重点研究了基于DCT的低频水印算法、基于DCT的中频水印算法和基于DCT的自适应视频水印方案。-DCT with a digital watermark dissertation. This paper focuses on the low-frequency DCT-based watermarking algorithm, IF DCT-based watermarking algorithms and DCT-based Adaptive Video W
SVPWM
- 变频驱动主要使用的驱动波形主要有SPWM和SVPWM两种。SPWM原理简单、实现容易,是现在使用最广的一种变频驱动波形。但其有一个致命的弱点是其电源利用率不高（只有86％）、谐波成分大。因此,在新近开发的产品中其应用逐渐被性能优异的SVPWM所取代。SVPWM是一种电压利用率、低谐波成分的变频驱动波形,还有开关次数少、功率管功耗小等特点。同时,SVPWM还能很好的结合矢量控制算法、以最大限度的发挥设备的性能。因此被越来越多的变频设备所采用。-The main use of variable f
8-bitmicrocontrollerbasedonthefrequencyofdesign.ra
- 基于89C51单片机技术，介绍了一种数字式频率计数器，该频率计具有操作简单方便、响应速度快、体积小等一系列优点。可以及时准确地测量低频信号的频率。-Based on the 89C51 single-chip technology, introduces a digital frequency counter, the frequency meter is simple convenient, fast response, a series of advantages of small size
AT89S52MCU-basedlow-frequencysignalgenerator
- AT89S52 MCU-based low-frequency signal generator-Low-frequency signal generator
NFPSS
- These set of programs are written to design a robust power system stabilizer for minimizing the effects of low frequency oscillations in electric power systems. A complete nonlinear model of the power system represented by a single machine connected
startingdirctlyfromthesource
- 直接光是从光源出发，直接照射到物体表面，由于物体问的遮挡和光源照射范围等因素，直接光照变化非常剧烈，分布很不均匀。而间接光照是由直接光照射到物体表面后，经过多次反射、折射产生的，因此。每个方向都有来自环境的间接光照，而且在空间的分布比较均匀，没有剧烈的变化，属于光照中的低频成分。由直接光照和间接光照产生的物体表面的光照效果可以统一表示为-Just starting directly from the source, direct exposure to the surface, due to o
vm
- Owing to the broad application value of audio watermarking in remote transmission and mobile extraction, it is very important to study watermarking approaches against A/D and D/A conversion. Based on wavelet decomposition and cepstrum technol
amorph
- Owing to the broad application value of audio watermarking in remote transmission and mobile extraction, it is very important to study watermarking approaches against A/D and D/A conversion. Based on wavelet decomposition and cepstrum technol
vm2
- Owing to the broad application value of audio watermarking in remote transmission and mobile extraction, it is very important to study watermarking approaches against A/D and D/A conversion. Based on wavelet decomposition and cepstrum technol
DTMFGenerator
- 量化DTMF的高频群和低频群正弦信号的XSW步长-DTMF high frequency group and quantify low-frequency sinusoidal signal XSW group step
Basn
- 超低频电磁波的非接触式参数设置系统设计Based on ultra-low frequency electromagnetic parameters of non-contact design-Based on ultra-low frequency electromagnetic parameters of non-contact design
dipinxinhaofashengqi
- 低频信号发生器,里面有很详细的步骤跟源码，对于设计的很有用-Low-frequency signal generator
dipingonglvfangdaqi
- 实用低频功率放大器设计，讲的还是挺不错的，推荐一下-Practical design of low-frequency power amplifier, speakers or very good, recommending
TEM
- 晚期瞬变电磁信号是大参数、 多频率、 且各频率分量未知的电磁信号， 特别在晚期还是强噪声背景下的微弱信号． 随机共振系统可以在极限信噪比的情况下提取微弱信号， 但仅适用于小参数、 单一频率或频率已知的高频信号的情况． 为此， 本文提出一种基于尺度变换的随机共振算法用于检测晚期瞬变电磁信号， 该方法充分利用了随机共振检测弱信号的优势， 通过引入尺度变换， 消除了随机共振系统对待测信号频率的限制， 在绝热近似理论下，实现了从强噪声中提取出微弱晚期瞬变电磁目标信号．-Transient Electro
31
- 通过在实车上模拟坦克变速箱工作档位齿轮故障,利用Hilbert变换幅值解调法提取箱 体振动信号的包络,并对包络信号进行抽取和低频段频谱细化,提出了一种基于包络细化谱分析的 坦克变速箱工作档位齿轮故障诊断方法。 - A fault diagnosis method of working position gear in tank gear-box was put forward based on simulating the fault of working position ge
ANC-for-MRI
- medical equipments make lot of low frequency noise. To control low frequency noise in MRI equipment ANC is used
tekway
- AC/AC交流变换技术的种类繁多,按照有无中间直流环节，可分为交—直—交型和交—交型两大类；按照交流用电负载与输入交流电源有无电气隔离以及电气隔离元件的工作频率，AC/AC交流变换技术又可分为非隔离型、低频环节和高频环节三大类[1]。-The AC/AC exchange transformation technology type is many, whether there is according to the middle direct-current link, can divide
Based-on-SPCE061A-counter
- 计数器基于凌阳SPCE061A微处理器设计,对高频信号采用测频法,提高精度,对低频信号采用测周法,可最大限度减小误差。能够接收函数信号发生器产生的信号,实现周期测量和时间间隔测量。可记忆10个测量的历史数据,实现语音报数功能且能够显示温度等多种功能。本系统经实验调试,较好地实现了预定的功能,由于采用了凌阳单片机控制,系统可靠性和性价比较高。- The designed counter adopts Sunplus SPCE061A MCU,uses frequency measurement f
tiaopinjieshoujidesheji
- 了解调频接收机整机各单元电路之间的关系及相互影响，从而能正确设计，计算调频接收机的各个单元电路：输入回路，高频放大，混频，中频放大，鉴频及低频功放级。初步掌握调频接收机的调整及测试方法。-Understand the FM receiver each unit of the relationship between the circuit and influence each other, thus can correct design, calculation of each unit cir