The test results show that the methods of self - programming are effective , convenient to expand the functions of system , and tracking on the spot also validates its credibility 测试结果表明,采用自编程的方法进行网络和串口通信是可行的、有效的,且利于软件功能扩展,实地跟踪试验也验证了此方法的可靠性。
In this paper , the gas flow is simulated in the 252kv self - extinguishing type sf6 circuit breaker which is being studied by the tianying company in pingdingshan . the idea which combines the self - programmed method and the fluid computation software is presented 本文配合平顶山天鹰集团开发研制的252kv自能式sf _ 6断路器,建立了相应的灭弧室气流场数学模型,提出了一种利用流体计算软件和自编程相结合的方法对灭弧室内的气流场进行计算。
Reactive power are calculated using the new algorithm . on the basis of analyzing different kinds of control strategies of var compensation , the paper applies the criterion of voltage and var to control switching and illustrates a improved mode of switching capacitor which can prevent the switched - capacitor from the impacting of instantaneous rush currents by means of zero - crossing triggering of scr components , and can realize auto - tracking var and auto - switching shunt capacitor bank . initial operating parameters are stored in information flash memory of the mcu using flash self - programming technique in order to decrease complexity of the circuit and improve stability 高压智能无功补偿控制器以flash型16位单片机msp430f149为控制核心,采用了一种相角实时测量的新算法,并在此基础上计算出了功率因数、有功和无功,减少了运算量提高了精度;在分析了各种无功补偿控制策略的基础上,以母线电压和无功功率复合判据控制投切,并提出一种改进的电容器投切方式? ?暂态投切控制晶闸管过零触发,避免了电容器投切时的电流冲击;稳态运行时接触器替代晶闸管,实现无功补偿的自动跟踪和电容器的自动投切,解决了投切时的暂态电流冲击和稳态时可靠运行的难题;控制器的原始运行参数采用flash自编程技术,将其保存在msp430f149片内的信息flash中,简化了硬件电路,大大提高了系统的可靠性。
Rfc821 , 2821 , 2554 , 2822 , 2920 , 3030 have defined the protocol smtp . i use self - programming method , which is the certification rfc2554 supplied , to transmit emails by ldap in qmail system . i store username and password in ldap , which can speed up the access Rfc821 , 2821 , 2554 , 2822 , 2920 , 3030等对smtp协议做出了规范,我们使用rfc2554提供的认证机制,采用自编程方式认证,提出了在qmail系统中使用ldap转发邮件的机制,利用ldap存储用户名和密码,大大提高了访问速度,能满足大规模用户的访问需要。