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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
renyiboxing
- 信号发生器是一种常用的仪器，能够实现各种波形，不同频率的输出，电子测试系统的重要部件。本研究 的数字信号发生器足基于直接数字合成即DDS技术设计的，采用VHDL与C语言相结合的方法，通过查找存储 于ROM查找表中的各种标准波形数据，产牛频率Hf调并且高精度的正弦波、方波、锯齿波等常用信号，并且町 以通过修改表中的数据，实现任意信号发生器-Signal generator is a commonly used instrument to achieve a variety of wav
TM-MATLAB
- 该代码是模拟TM波在真空下传播的MATLAB源程序-The code is a simulation of TM wave propagation in a vacuum under the MATLAB source code
Rossby1
- 首先介绍差分格式，然后数值模拟非线性罗斯贝波扰动能量的演变，给出流场和扰动能量演变的示意图-Numerical method is to be used to investigate the evolutions of linear and nonliear Rossby wave of middle-high latitude in different seasons under the actual basic flow, we mainly discuss the evolutions o
CRYSTAL-FIBER
- 国外光子晶体光纤的非线性模拟博论，挺不错的-this dissertation is numerical modeling of wave propagation in nonlinear photonic crystal fiber
Gibbs-to-matlab
- 在Matlab中利用傅里叶变换求解波动方程，快速简便-Fourier transform to solve the wave equation in Matlab, quick and easy
Intelligent-curtain-control
- 可调式智能窗帘控制系统.本设计是采用stc89c52单片机对步进电机进行控制，光敏二极管在受到不同亮度和强度的光照射的时候，电阻的变化为单片机输入控制信号，单片机通过IO口输出的有时序的方波作为步进电机的控制信号，信号经过ULN2003A驱动步进电机；同时，也可以采用独立连接式非编码键盘对电机的状态进行控制，并用发光二极管显示单片机的工作状态，单片机输出控制信号，通过驱动芯片放大后，给步进电机提供时序脉冲，来控制步进电机的转向，从而实现对门帘的智能控制其收起或者放下的动作。-Adjustable
51-cap
- 基于AT89C51单片机和555芯片构成的多谐振荡电路设计一电容测量电路，这种测量方法主要是通过一块555芯片来测量电容大小。让555芯片工作在直接反馈无稳态的状态下，555芯片输出一定频率的方波，其频率的大小跟被测量的电容之间的关系是：f=0.772/(R*Cx) ，固定R的大小，其公式就可以写为：f=k/Cx，只要能够测量出555芯片输出的频率，就可以计算出测量的电容。计算频率的方法可以利用单片机的计数器T0和中断INT0配合使用来进行测量。 文件内含有proteus工程及keil工程建
Example4-Supercell-method
- 用平面波展开法计算二维带缺陷态结构的光子晶体的能带图。matlab程序源代码-With a two-dimensional plane wave expansion method to calculate the band structure of photonic crystal defect states in the energy band diagram. matlab source code
Partial_Differential_Equations_in_Matlab
- In this document has been introduced how to solve different partial differential equations in Matlab programming language.Everbody can solve Heat Conduction Equation, Helmholtz Equation, Laplace Equation and Wave Equation for different initial and bo
Mathematical-Foundation
- Due to the properties of sine and cosine, it is possible to recover the amplitude of each wave in a Fourier series using an integral. In many cases it is desirable to use Euler s formula
HYBRIDP-ARALLELA-CTIVEF-ILTERS-YSTEM
- This paper presents a hybrid parallel active filter scheme using small rated square-wave inverters for supply line harmonic current reduction for high power non-linear loads in the range of 1 - 50 MW to meet IEEE 519 harmonic standards.
Channel-Model-for-millimeter-Wave
- Channel modeling is an integral part in designing a cellular network. In this paper a channel model is developed based on geometry statistics. The designed channel model is applicable for high frequency band. The proposed channel model holds the char