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一类线性方程组解的条件数估计
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引用本文:孙苏亚 杨兴东 张佳静 陈成.一类线性方程组解的条件数估计[J].南京信息工程大学学报,2011,(2):182~190
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作者单位E-mail
孙苏亚 杨兴东 张佳静 陈成 南京信息工程大学 数理学院,南京,210044 sunsuya.student@sina.com 
基金项目:国家自然科学基金(40975037)
中文摘要:利用矩阵范数的性质,给出了一类特殊线性方程组条件数估计,这有助于判别方程组解的灵敏度.
中文关键词:条件数  线性方程组  谱范数  谱半径
 
The condition number estimation for a class of linear systems
Abstract:The paper presents a design of electronic cipher lock based on touch screen,which takes microprocessor LPC2132 of ARM7 as the core component to control the entire system.The paper makes detailed description about the design principle both of hardware and software.The system has some functions:password input,add,clear and display,when password is correct the system is unlock.Alarm when entering wrong password over three times,lock the keyboard and set the initial system when the input password is wrong or the input time is over.This design reduces the fault rate and improves the reliability,security and safety.Combined with touch screen,the electronic cipher lock works effectively and conveniently.
keywords:electronic cipher lock  LPC2132  touch screen
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