ABSTRACTABSTRACTPulse meter in our daily life have got the very extensive application.In order to improvethe simplicity and accuracy of the apparatus used to measure the pulse,this...

AbstractLight-emitting diode (Light Emitting Diode,LED)appeared in the later 20thcentury as a new lighting source.LED play an important part in energy saving andenvironmental prote...

微细电解线切割机床设计摘要微细电解线切割加工时一种结合了电解加工和线切割的新型加工工艺，以电解加工为基本原理，采用导电铜丝为工具电极，被加工块、板件工件、难切削材料、难切削形状作为...

1绪论在现代社会，随着时代的发展，人们对访问控制系统的需求日益增加，其应用也越来越广泛，在当前人们安全意识逐渐提升的大环境背景之下，访问控制系统依然成为社会关注的热点，也是当前科学...

ABSTRACTIn the 21st century,our people's life has also entered a well-off society.With the improvement ofliving standards,I chose some common life gases in my graduation project,am...

finally completed the design of the room security alarm.In this design,the alarm circuit hassimpler structure,reliable control module,better performance/price ratio and ability to ...

Design of Intelligent Vision Protector Based on 51 Single ChipMicrocomputerAbstract:On this day,the school of young people is heavy.And young people have pooreyesight.This situatio...

目录1绪论.1.1课题背景1.2研究现状.1.3研究目标2相关技术介绍..22.1 Android操作系统简介2.2 Android布局管理器22.3 Android基本组件介绍2.4四大组件的使用.33系统分析…3.1可行性分析..53.2功...

第一章绪论1.1课题的研究背景随着电子电路技术的发展，频率计的设计技术不断发展。在二十世纪初，设计者通常使用分立元件来设计频率计。在设计周期和稳定性方面存在诸多缺陷，生产的产品体型较...

Alcohol Testing Instrumment Based on Single-chipMicrocomputerAbstractAlcohol has the effect of brain paralysis,will lead to drinking the probability of driving accidents increased ...