基于FPGA的电子密码锁设计

基于FPGA设计的电子密码锁,运用EDA技术自顶向下的方法,采用硬件描述语言VHDL实现了密码锁的解锁、密码修改、报警提示及液晶显示功能。硬件测试结果表明,密码锁功能丰富、操作简单、安全性高、易于维护和升级。     

基于单片机的密码锁设计

指纹密码锁的设计采用的是以单片机AT89C52为主要的控制器,主要由液晶显示电路、指示(LED)电路、报警(蜂鸣器)电路,开锁电路等组成.指纹处理采用DSP芯片,通过proteus软件进行仿真,绘制PCB板,基于C51编写程序来实现指纹密码锁的功能.指纹密码锁可实现6位密码输入和指纹采集,密码或指纹正确则锁打开;修改密码和指纹需要二次确认,以防止误操作;解锁错误次数超过3次,蜂鸣器报警.设计此系统的密码锁具有较高的安全性和科学性.     

基于Android的防盗追踪与隐私保护系统

随着国内Android终端呈现爆发式发展,隐私保护成为人们在互联网时代最为关注的问题。系统通过绑定IMSI码检测当前系统是否处于安全状态,并研究人脸识别在Android系统中的实现以及用户个人信息的保护。该系统包含人脸解锁、密码解锁、设置/取消加密应用、程序锁、数据备份、查看偷窥者记录信息和查看定位信息等功能。     

电子银行客户密码安全保护策略的探讨

电子银行中对客户信息的保护一直是应用开发人员和银行客户非常关注的问题,也是电子商务系统能被信息社会广泛应用的一个非常重要因素。本文首先分析目前电子银行客户密码存在的安全问题,结合作者工作的实际设计了三种客户密码的保护策略与方法,实用结果表明这些方法有一定实际应用价值。     

全电子微机联锁系统信号的解锁模块探究

本文通过全电子微机联锁系统的发展过程、构成及相应特点的研究,重点对解锁模块进行了深入的探究,对三种解锁的特殊功能进行浅谈,通过这一模块的研究,让我们增加了对联锁系统信号的解锁模块的了解．     

面向校园的智能储物柜系统设计

由于普通的电子储物柜系统功能过于简单,而且需要提供一次性密码或者凭条,不适用于校园或者生活小区等面向固定群体、需要频繁使用的场所.结合当前储物柜应用的发展趋势,研制开发一套面向高校的智能电子储物柜系统.系统利用人机交互、网络通信和视频监控等技术实现储物柜的智能化控制;系统采用三级分层之间的数据交换模式,能够实现存取信息的动态存储以及现场图像的采集,方便历史查询,真正意义上实现了智能存储柜的智能化、信息化管理.     

面向校园的智能储物柜系统设计

由于普通的电子储物柜系统功能过于简单,而且需要提供一次性密码或者凭条,不适用于校园或者生活小区等面向固定群体、需要频繁使用的场所.结合当前储物柜应用的发展趋势,研制开发一套面向高校的智能电子储物柜系统.系统利用人机交互、网络通信和视频监控等技术实现储物柜的智能化控制;系统采用三级分层之间的数据交换模式,能够实现存取信息的动态存储以及现场图像的采集,方便历史查询,真正意义上实现了智能存储柜的智能化、信息化管理.     

电子实验报告管理系统的实现

实验报告作为记录学生实验信息的载体,能够反映学生的动手实践能力,是实验室管理中的重要部分.然而传统的实验报告管理办法已经不适应网络化运行的时代,通过设计采用电子实验报告的管理形式,既方便了管理工作又节省了资源.本文对电子实验报告管理系统的整体框架和功能实现进行阐述.     

信息技术课学生电子作业的Ftp提交

本文针对信息技术课教学中存在的学生电子作业及考试作品难于提交、采用网络共享或公用的Ftp帐号容易相互删除或拷贝作弊等问题,阐述了利用Ms Access＋ASP设计,以Serv-U原版软件为基础的学生电子作业Ftp提交系统的解决方案。该系统运行稳定,效率较高,学生可自行修改作业管理密码,并实现了快速高效上传下载作业的功能。     

基于STC89C52的智能防盗防火报警系统设计

设计了一种智能防盗防火报警系统,可全天候自动检测盗警和火警。该智能报警系统主要包含防盗防火模块及智能监控管理控制模块两大部分。前者是下位机,以STC89C52单片机为核心,采用热释电红外传感器实现防盗的功能;采用烟雾传感器实现防火的功能;采用红外传感器检测宿舍人员的进出情况,并用片内EEPROM做纪录;采用无线模块检测贵重物品的进出的功能。此外模块还能通过密码识别,当报警信息发出后只有输入正确的密码才能实现解警功能。后者是上位机,也以STC89C52单片机为核心,主要实现异地监控功能,与下位机采用RS485通信方式。下位机的报警求助信息及时传送到上位机,以便监控模块能采取相应的应急措施。整体系统功耗较小,兼容性好,稳定性高,成本低。     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

不同的吃喝玩乐

一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/     

漏洞百出的教育

Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help?     

Western and Eastern culture differences in commercial field

The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity.     

只要努力,不要后悔

There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.     

浅谈移民问题

Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject.     

Sister Carrie, an Adherent of Desires

Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities.     

Improvement of one-cycle controller by use of proportional integral differential controller

1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec…     

风的曲线

Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose.