Multiple frequency cw radar is regarded as a great revolution to the structure of traditional ranging radar 基于數(shù)字化技術(shù)的多頻連續(xù)波測距雷達是目前測距雷達體系結(jié)構(gòu)的一次比較大的革新。
To reserve " guaranteed slots " on two multiple frequency network multiplexes for the simulcast of the existing free - to - air analogue television channels ( paragraph 7 . 7 ) 在其中兩條多頻網(wǎng)絡(luò)數(shù)碼頻道內(nèi)預(yù)留足夠的頻槽,作為同步廣播現(xiàn)有免費模擬電視服務(wù)之用(第7
Software radio system is applicable to multiple frequency bands and it can change working mode flexibly . the system can interwork and is compatible with various equipment of different system and standard 軟件無線電系統(tǒng)適用于多個頻段,可靈活地改變工作模式,能與不同體制和標(biāo)準(zhǔn)的各種設(shè)備互通和兼容。
From chapter three to chapter five , the three key components of the system : millimeter - wave phase locked sources , multiple frequency local source , low noise amplifier are designed and tested 第三章至第五章分別介紹了毫米波鎖相源、二倍頻本振源和低噪聲放大器三個系統(tǒng)關(guān)鍵的單元電路的設(shè)計過程和測試結(jié)果。
Moreover , multiple frequency stimulation method can increase consumption of ic obviously and surface diffuse reflection method can improve surface emission coefficient of ic availably 混和信號激勵法能明顯增大三極管放大電路耗散功率,特別是第一級耗散功率;增頻激勵法能有效提高ic耗散功率;表面漫射法能有效增大元器件的發(fā)射系數(shù)。
Phase lock and multiple frequency circuit diminishes the influence from frequency fluctuation of electric net ; in addition , multiple channels simultaneous sampling , high - precision circuit decreases the error caused from the sampling tache 用鎖相倍頻跟蹤電路來提供采樣頻率,以減少頻率波動的影響,用多路同采的高精度采樣電路來減少采樣環(huán)節(jié)引入的誤差。
The atv - tvb supplementary response also emphasised that smooth transition should be the priority in formulating dtt policies and the seriousness of the problems of the proposed channels 35 and 37 and multiple frequency networks ( mfns ) 電視的補充回應(yīng)強調(diào)在厘訂數(shù)碼地面電視政策時,順利過渡應(yīng)為首要;以及指出選用第35及第37頻道和多頻網(wǎng)絡(luò)數(shù)碼頻道( mfns )的問題的嚴(yán)重性。
With the speed increment , not only 1 / 2x and 2 / 3x frequency component appear in low frequency segment , but also 4 / 3x frequency component begin to appear in high frequency segment . the amplitude of fraction frequency is usually larger than that of multiple frequencies . the nonlinear characteristic of torsion for rubbing rotor is similar with that of flexural vibration completely 研究結(jié)果證實了扭振特征和非線性特性用于該類故障診斷的可行性:從發(fā)生碰摩起,扭振分頻和倍頻相伴出現(xiàn),轉(zhuǎn)速較低時, 1 / 2x成分突出,隨著轉(zhuǎn)速升高,不但有1 / 3x及2 / 3x分量出現(xiàn),而且出現(xiàn)了4 / 3x成分,分頻幅值大于工頻及倍頻;彎振和扭振的非線性運動特性完全相似,扭振有抑制轉(zhuǎn)子系統(tǒng)復(fù)雜運動的能力。