On systematical obstacle to increate peasants ' income 增加農(nóng)民收入的體制性障礙
It can be expected that the increate will be hold in the future 預(yù)計(jì)在未來(lái)幾年里,我國(guó)國(guó)際集裝箱仍將保持強(qiáng)勁增長(zhǎng)勢(shì)頭。
Some studies on control modes of the system , especially on a dc , pm , brushless and sensor - less motor driven systems . a method of rotor position identification without sensors has been developed . using a microchip to increate system efficiency , anti - disturbing ability and reliability of pwm modulation 研究了適于直流、無(wú)刷、永磁、無(wú)位置傳感器電機(jī)轉(zhuǎn)子位置的檢測(cè)方法;采用單片機(jī)實(shí)現(xiàn)了該種電機(jī)的運(yùn)行控制,提高了系統(tǒng)在pwm調(diào)制時(shí)位置檢測(cè)換相控制過(guò)程的抗干擾能力。