極幅調制的 的英文怎麼說
中文拼音 [jífúdiàozhìde]
極幅調制的
英文
pole-amplitude-modulated- 極 : i 名詞1 （頂點; 盡頭） the utmost point; extreme 2 （地球的南北兩端; 磁體的兩端; 電源或電器上電流...
- 幅 : Ⅰ名詞1. （布帛、呢絨等的寬度） width of cloth 2. （泛指寬度） width; size 3. （姓氏） a surname Ⅱ量詞（用於布帛、呢絨、圖畫等）
- 調 : Ⅰ動詞1 （配合得均勻合適） harmonize; suit well; fit in perfectly 2 （使配合得均勻合適） mix; adju...
- 制 : Ⅰ動詞1 （製造） make; manufacture 2 （擬訂; 規定） draw up; establish 3 （用強力約束; 限定; 管束...
- 的 : 4次方是 The fourth power of 2 is direction
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Along with national macroscopic control, the market of road project becomes more and more competitive, such as the price of contract is worse. the industry is threshed by three market injections, that is increasing material price, the lowest acceptance and cash guarantee. the above make the industries of road project under the situation of the lower profit and harder capital running and greater competition pressure
隨著國家的宏觀調控，公路工程建築市場競爭日愈加劇，其承包價格戰進入了白熱化階段，而且自2003年以來，還不斷受到建築原材料價格上漲、最低價中標制度、現金保證金制度三個市場因素的嚴酷沖擊，直接導致公路工程施工企業利潤大幅下滑和資金運轉困難，企業面臨極大的競爭壓力，生存環境不容樂觀。Throw the research we can get the performance of the joint of the unbond precast and pretressed continuous beam and how the moment redistributes. we got the conclusion that compare the monolithic prestressed continuous beam, the unbond precast and pretressed continuous beam has short amplitude modulation capacity
得到預制預應力連續梁接縫處的受力性能，內力重分佈的表現形式，並認為在極限荷載下預制預應力連續梁的調幅能力低於整澆式連續梁等特性。According to the following design theory : the dsp calculates in real time and produces three phases spwm waves to control the on or off of the 6 igbts in ipm respectively. ipm then inverts the commutated single phase direct current ( insulated gate bipolar transistor ) into three phases alternating current. when modulated signals of spwm are changed, the on - off time of switches also changes, so as to the voltage and frequency of output signals
本文提出了一種基於dsp （數字信號處理器tms320f240 ）的通用的三相間接變頻電源系統，利用分段同步調製法和混合查表法，實時計算不同頻率下的采樣周期、電壓幅值、輸出脈寬，產生雙極性spwm波形，經驅動放大後用于ipm （ intelligentpowermodule ）中的絕緣柵雙極型晶體管柵級驅動，以控制電源的輸出電壓和頻率，實現變頻電源的智能數字控制。
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