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 測(cè)試結(jié)果表明,采用自編程的方法進(jìn)行網(wǎng)絡(luò)和串口通信是可行的、有效的,且利于軟件功能擴(kuò)展,實(shí)地跟蹤試驗(yàn)也驗(yàn)證了此方法的可靠性。
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 本文配合平頂山天鷹集團(tuán)開發(fā)研制的252kv自能式sf _ 6斷路器,建立了相應(yīng)的滅弧室氣流場(chǎng)數(shù)學(xué)模型,提出了一種利用流體計(jì)算軟件和自編程相結(jié)合的方法對(duì)滅弧室內(nèi)的氣流場(chǎng)進(jìn)行計(jì)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 高壓智能無功補(bǔ)償控制器以flash型16位單片機(jī)msp430f149為控制核心,采用了一種相角實(shí)時(shí)測(cè)量的新算法,并在此基礎(chǔ)上計(jì)算出了功率因數(shù)、有功和無功,減少了運(yùn)算量提高了精度;在分析了各種無功補(bǔ)償控制策略的基礎(chǔ)上,以母線電壓和無功功率復(fù)合判據(jù)控制投切,并提出一種改進(jìn)的電容器投切方式? ?暫態(tài)投切控制晶閘管過零觸發(fā),避免了電容器投切時(shí)的電流沖擊;穩(wěn)態(tài)運(yùn)行時(shí)接觸器替代晶閘管,實(shí)現(xiàn)無功補(bǔ)償?shù)淖詣?dòng)跟蹤和電容器的自動(dòng)投切,解決了投切時(shí)的暫態(tài)電流沖擊和穩(wěn)態(tài)時(shí)可靠運(yùn)行的難題;控制器的原始運(yùn)行參數(shù)采用flash自編程技術(shù),將其保存在msp430f149片內(nèi)的信息flash中,簡(jiǎn)化了硬件電路,大大提高了系統(tǒng)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等對(duì)smtp協(xié)議做出了規(guī)范,我們使用rfc2554提供的認(rèn)證機(jī)制,采用自編程方式認(rèn)證,提出了在qmail系統(tǒng)中使用ldap轉(zhuǎn)發(fā)郵件的機(jī)制,利用ldap存儲(chǔ)用戶名和密碼,大大提高了訪問速度,能滿足大規(guī)模用戶的訪問需要。