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计算机技术的第一次出现在美国的1…
One of the first occurrences of computer technology occurred in the USA in the 1880s. It
was due to the American Constitution demanding that a survey is undertaken every 10 years.
As the population in the USA increased, it took an increasing amount of time to produce the
statistics. By the 1880s, it looked likely that the 1880 survey would not be complete until
1890. To overcome this, Herman Hollerith (who worked for the Government) devised a machine
which accepted punch cards with information on them. These cards allowed a current
to pass through a hole when there was a hole present.
- 2022-02-20 02:14:45下载
- 积分:1
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视觉,C,MFC简明教程,还不错哦,可能是
一个Visual,C,MFC,的简明教程,还不错哦,可值得选择一看- Visual, C, MFC, concise course, but also is good oh, may be
worth choosing as soon as looked
- 2022-01-25 15:48:29下载
- 积分:1
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There are two kinds of cryptography in this world: cryptography that will stop y...
There are two kinds of cryptography in this world: cryptography that will stop your kid sister from reading your files, and cryptography that will stop major governments from reading your files. This book is about the latter
- 2023-01-10 06:50:04下载
- 积分:1
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SQL Server 2000 in SQL language! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !
SQL Server 2000中的SQL语言-SQL Server 2000 in SQL language! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !
- 2022-02-03 20:38:40下载
- 积分:1
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莱昂氏UNIX源代码分析.这绝对是一本bible级的经典教材。
莱昂氏UNIX源代码分析.这绝对是一本bible级的经典教材。-it is a good book!
- 2022-11-14 05:55:04下载
- 积分:1
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算法导论第二版答案
基本上好多答案都有,仅供参考使用!基本上好多答案都有,仅供参考使用!基本上好多答案都有,仅供参考使用!基本上好多答案都有,仅供参考使用!基本上好多答案都有,仅供参考使用!基本上好多答案都有,仅供参考使用!基本上好多答案都有,仅供参考使用!基本上好多答案都有,仅供参考使用!基本上好多答案都有,仅供参考使用!基本上好多答案都有,仅供参考使用!基本上好多答案都有,仅供参考使用!基本上好多答案都有,仅供参考使用!
- 2023-05-04 10:10:05下载
- 积分:1
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SIP Chinese version of the agreement, issued by the Ministry of Information Indu...
SIP中文版协议,由信息产业部发布的。基于SIP上面的P2P网络传输。-SIP Chinese version of the agreement, issued by the Ministry of Information Industry. The above SIP-based P2P network transmission.
- 2022-03-09 21:38:17下载
- 积分:1
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《Visual C++数字图像识别技术典型案例》第三章指纹识别系统(上)源码...
《Visual C++数字图像识别技术典型案例》第三章指纹识别系统(上)源码-"Visual C Digital Image Recognition Technology typical case of" Chapter III Fingerprint Identification System (1) Source
- 2022-02-03 12:16:54下载
- 积分:1
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教学楼智能灯光控制系统设计摘要:为节约能源,节省设备,智能管理,设计了基于Mcs一51系列微控制器的智能教学灯光控制系统,系统通过光敏电阻将光照
强度转换成...
教学楼智能灯光控制系统设计摘要:为节约能源,节省设备,智能管理,设计了基于Mcs一51系列微控制器的智能教学灯光控制系统,系统通过光敏电阻将光照
强度转换成电压信号,经A/D转换器转换成数字信号,送入控制器进行分析,得出光线等级;通过红外传感器判断教室内部的人数,根
据光线等级和教室人数的情况,系统给出相应的开关动作控制教室的照明,实现以指令的方式对教学楼照明的总体控制;使用字符型液
晶显示屏,显示内容更丰富;系统操作简单,界面友好,适合现代化校园的照明控制系统的控制要求及需要。-err
- 2022-02-03 12:07:02下载
- 积分:1
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从网上下载的程序员杂志2005年第5期
从网上下载的程序员杂志2005年第5期...
从网上下载的程序员杂志2005年第5期
从网上下载的程序员杂志2005年第5期-downloaded from the Internet programmers in 2005 magazine article five downloaded from the Internet programmers in 2005 magazine article 5
- 2022-02-02 10:41:09下载
- 积分:1