Cluster validation program including Dunn s index, Davies-Bouldin Index and Scat-Dis index.
标签： index Davies-Bouldin validation including
上传时间： 2017-08-31
上传用户：大三三
Cluster validation program
标签： validation Cluster program
上传时间： 2013-12-06
上传用户：daguda
Cross-correlation of several signals
标签： Cross-correlation several signals of
上传时间： 2017-09-19
上传用户：我们的船长
Sample algorithm for credit card validation
标签： validation algorithm Sample credit
上传时间： 2013-12-16
上传用户：cjf0304
互相关函数,cross-correlation function
标签： cross-correlation function 函数
上传时间： 2017-09-28
上传用户：huannan88
cross-correlation function
标签： cross-correlation function
上传时间： 2017-09-28
上传用户：kr770906
互相关函数,cross-correlation function
标签： cross-correlation function 函数
上传时间： 2017-09-28
上传用户：ecooo
1602显示程序 显示CROSS FIRE 基于8051系列单片机 附电路图
标签： 1602
上传时间： 2013-07-16
上传用户：lw852826
Specification: 输入信号：DC9-32V&AC100-240V 适用负载：电热负载，电感负载 控制方式：零点触发（Zero cross turn-on） 输入额定电压：AC 110-440±10% 输入额定电流：200-400A 使用频率：50/60Hz 使用环境：-10℃-50℃ 90%RH 冷却方式：风冷式
上传时间： 2013-11-14
上传用户：拔丝土豆
锁定放大是微弱信号检测的重要手段。基于相关检测理论，利用开关电容的开关实现锁定放大器中乘法器的功能，提出开关电容和积分器相结合以实现相关检测的方法，并设计出一种锁定放大器。该锁定放大器将微弱信号转化为与之相关的方波，通过后续电路得到正比于被测信号的直流电平，为后续采集处理提供方便。测量数据表明锁定放大器前级可将10-6 A的电流转换为10-1 V的电压，后级通过带通滤波器级联可将信号放大1×105倍。该方法在降低噪声的同时，可对微弱信号进行放大，线性度较高、稳定性较好。 Abstract: Lock-in Amplifying（LIA）is one of important means for weak signal detection. Based on cross-correlation detection theory， switch in the swithched capacitor was used as multiplier of LIA， and a new method of correlation detection was proposed combining swithched capacitor with integrator. A kind of LIA was designed which can convert the weak signal to square-wave， then DC proportional to measured signal was obtained through follow-up conditioning circuit， providing convenience for signal acquisition and processing. The measured data shows that the electric current（10-6 A） can be changed into voltage（10-1 V） by LIA， and the signal is magnified 1×105 times by cascade band-pass filter. The noise is suppressed and the weak signal is amplified. It has the advantages of good linearity and stability.
上传时间： 2013-11-28
上传用户：黑漆漆
