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nannvshengshibie
- 本文通过对男性和女性声音的语音特征的研究，发现男女声的基音频率存在较大的差异，并设计了基于基音频率分析的男女声识别系统。男女声识别系统由以下三个模块电路构成：话筒放大器，低通滤波器，半波整流电路，单片机测量控制模块。话筒放大器采用NE5532P音前置芯片，对语音信号进行放大；八阶低通滤波器MAX293完成基音信号的提取；单片机STC12C5410AD实现频率测量和控制输出功能。经仿真与电路实测，男女声的识别效果良好。-In this paper, the voices of male and f
RX8025TUsr
- 1. 内置高稳定度的32．768KHz 的DTCXO (数字温度补偿晶体振荡器) 2. 支持I2C 总线的高速模式（400K）。 3. 定时报警功能（可设定：天，日期，小时，分钟） 4. 固定周期定时中断功能。 5. 时间更新中断功能。 6. 32．768KHz 频率输出（具有使能OE 功能） 7. 闰年自动调整功能。（2000 到2099） 8. 宽范围接口电压：2.2V 到 5.5V 9. 宽范围的时间保持电压：1.8V 到 5.5V 10. 低电流功耗：
AD7790
- 一款ADI的高精度ADC，有详细的描述，可以作为开发资料-The AD7790 is a low power, complete analog front end for low frequency measurement applications. It contains a low noise 16-bit ∑-∆ ADC with one differential input that can be buffered or unbuffered along
Vital-sign-detection-method
- 基于高阶累积量的生命微动信号检测方法的研究成果，发表在IEEE Transaction Geoscience and Remote Sensing 期刊上-The research on vital information extraction meets a lot challenges due to the narrow bandwidth and low signal-to-noise ratio of a vital sign in real environment. In th
1-s2.0-S0030402613001447-main
- The wavelet transform divides image into different but interrelated multi-resolution and multi-level sub-bands, so quantization coding strategy of image wavelet coefficient has great flexibility. To address to energy aggregation and correlated fe
Q2
- 强电一般是电力系统中的电，比如说220v的照明电，以及1000多v的工业用电等，强电的特点是电压高，频率低，电流大，强电是用来驱动大功率的电力设备的。比如说电动机，电灯等用电设备。-Strong power is generally the electric power system, such as 220v electrical lighting, and more than 1,000 v industrial electricity, etc., characterized by str
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- 基于循环统计理论, 对循环平稳信号进行处理, 主要研究了信号的二阶循环统计特性, 即循环自相关函数和循环谱密度, 指出循环自相关函数不为零的循环频率对应着信号中的某些故障, 并 可以对调幅信号进行解调. 通过循环频率扫描方法提取的调制源分布在循环频率域的低频段, 其结 果可用循环频率-频率- 循环谱密度的三维图表示. 用仿真信号对该方法进行验证, 并应用于滚动轴承的内、外圈及滚动体的故障诊断, 可以有效地分离出所对应的故障特征频率.-Statistical theory based on
IEEE-PSS
- uses the eigenvalue analysis approach to observe the impact of load models on an unstable low frequency oscillation damping, which recently occurred in the Taiwan power system. In order to enhance oscillation damping, the effect of load model
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- 图像的小波简单压缩方法，包括最优包的小波压缩，和低频信息保留压缩方法。-Wavelet image compression method is simple, including optimal packet wavelet compression, and low-frequency information retention compression method.
tain
- 耳蜗实质上相当于一个滤波器组，耳蜗的滤波作用是在对数频率尺度上进行的，在1000HZ下，人耳的感知能力与频率成线性关系；而在1000HZ以上，人耳的感知能力与频率不构成线性关系，而更偏向于对数关系，这就使得人耳对低频信号比高频信号更敏感。Mel频率的提出是为了方便人耳对不同频率语音的感知特性的研究。频率与Mel频率的转换公式为-Cochlear substantially equivalent to a filter set, cochlear filter is used on logarit
untitled
- In order to reduce the volume and cost of the Z-source network, we need to eliminate the low-frequency current ripple by using a constant shoot-through duty ratio
Optically-controlled-antenna
- 光控天线设计Optically controlled beam steering system with 60-W power-over-fiber feed for remote antenna units；Optically controlled E-antenna for cognitive and adaptive radio over fiber systems；Optically Controlled Frequency-Reconfigurable Microstrip Anten