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基于Python的机器学习实战:Apriori
目录:1.关联分析2. Apriori 原理3. 使用 Apriori 算法来发现频繁集4.从频繁集中挖掘关联规则5. 总结1.关联分析 返回目录关联分析是一种在大规模数据集中寻找有趣关系的任务。这种关系表现为两种形式:1.频繁项集(frequency item sets):经常同时出现的一些元素的...
分类:编程语言   时间:2015-11-28 21:38:47    阅读次数:358
手机维修技术
the frequency and amplitude of vi'bration are monitoredASK FSK PSK: amplitude shift keying : 振幅键控, 幅移键控...MSK: minimum shift keying: 最小(频移)移位键控GMSK: 高...
分类:移动开发   时间:2015-11-14 11:07:32    阅读次数:295
origin Add multiple fitted curves in a Histogram
5.10.11 Add multiple fitted curves in a Histogram Contents 1 Summary 2 What you will learn 3 Steps 3.1 Frequency Count 3.2 Fit peaks 3.3 Add the fitte...
分类:其他好文   时间:2015-11-07 13:33:21    阅读次数:243
【转】PC架构系列:CPU/RAM/IO总线的发展历史!
1. 从 IBM PC XT 架构开始...一开始PC的设计中,CPU/RAM/IO都是被一条总线(BUS)连接起来,所有的部件都必须在同步的模式下面工作,由CPU来决定的其他设备工作在什么频率(Frequency)上。这样就带来一个"互锁" (locked to each other )效应,即大...
分类:其他好文   时间:2015-10-15 15:43:34    阅读次数:255
RFID Exploration and Spoofer a bipolar transistor, a pair of FETs, and a rectifying full-bridge followed by a loading FET
RFID Exploration Louis Yi, Mary Ruthven, Kevin O'Toole, & Jay Patterson What did you do? We made an Radio Frequency ID (RFID) card reader and, while a...
分类:其他好文   时间:2015-09-28 23:38:18    阅读次数:409
数字信号处理2-截止频率
截止频率 (2013-10-07 23:50:04)转载▼在物理学和电机工程学中,一个系统的输出信号的能量通常随输入信号的频率发生变化(频率响应)。截止频率(英语:Cutoff frequency[1])是指一个系统的输出信号能量开始大幅下降(在带阻滤波器中为大幅上升)的边界频率。概述电子滤波器等信...
分类:其他好文   时间:2015-09-26 17:06:30    阅读次数:185
RFID Detector
RFID DetectorThere is a lot of buzz lately about RFID (Radio Frequency ID) tags, mostly because of JC Penny's announcement of switching their retail s...
分类:其他好文   时间:2015-09-22 06:33:27    阅读次数:875
RFID (Radio Frequency Identification): A Tutorial
RFID (Radio Frequency Identification): A TutorialContents:Introduction to Radio Frequency Identification-RFIDWhat is RFIDCompare RFID with Bar Code Te...
分类:其他好文   时间:2015-09-22 06:32:26    阅读次数:292
Basic Modulation Techniques: AM FM
The origin of all radio modulation techniques stem back to the AM and FM basic modulation. AM modulation changes the carrier frequency according to th...
分类:其他好文   时间:2015-09-22 01:19:57    阅读次数:1169
Timer
public class Reminder{ Timer timer; protected int start=0; protected int end=0; public Reminder(int s,int e,int frequency){ start = ...
分类:其他好文   时间:2015-09-17 11:28:12    阅读次数:165
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