reference n. 1.(對委員、審查人等的)委托;委托項目[范圍]。 2.說到,論到,提到。 3.參考;參考書;附注,引證;基準(zhǔn),依據(jù);關(guān)系。 4.(關(guān)于人品、能力等的)查詢,咨詢,詢商;可供查問的人;證明人,介紹人;(身份、能力等的)證明書,介紹書,服務(wù)經(jīng)歷,鑒定書。 5.參看符號〔如 asterisk[*e], obelisk ?, section§, parallel‖, paragraph π等〕 (=reference marks)。 the commission's terms of reference 委員會的職權(quán)。 R- was made to me. 提到了我;所指的是我。 You make no reference to your plan in your letter. 你信里沒有提到你的計劃。 a book of reference=a reference book 參考書。 Who are your references 你的證明人都是誰? bear reference to =have reference to. give a reference to 提到,介紹。 have reference to 和…有關(guān)系。 in reference to 關(guān)于。 load one's pages with references (在著作中)引用大量參考資料[文獻(xiàn)]。 make reference to 說到,涉及,提到;參考;查問;介紹。 with reference to 關(guān)于。 without reference to 不管,不論(without reference to age or sex 無論男女老少)。 vt. 加注,附加注腳;給(書等)列出參考書目[注明資料來源]。
frequency n. 1.屢次,頻仍,頻繁。 2.(脈搏等的)次數(shù),出現(xiàn)率;頻度;【物理學(xué)】頻率,周率。 audio frequency音頻。 a high [low] frequency高[低]頻。 the frequency of earthquakes in Japan 地震在日本的頻繁發(fā)生。 mean [median] frequency中頻。 resonance [resonant] frequency諧振頻率,共振頻率。 ultrahigh frequency超高頻。 ultralow frequency超低頻。 very high frequency甚高頻。 very low frequency甚低頻。
Dds is used to achieve fine resolution , while injection phase lock circuit is used to realize low phase noise high performance input reference frequency Dds用于實(shí)現(xiàn)小步進(jìn),而注入鎖相電路則用來產(chǎn)生低相噪的高性能參考源。
The equivalent cavity model is used to deduce the threshold condition of the ecld , and the expression of the threshold carrier density n ( v ) when ecld is tuned to oscillate at different frequencies has been obtained . using the expression of n ( v ) and the carrier dependent refractive index , the simple basic equation describing the bistable characteristics has been derived after choosing an appropriate reference frequency nf 通過建立等效腔模型來推導(dǎo)外腔半導(dǎo)體激光器的閾值條件,得到ecld在不同頻率v振蕩所需的閾值載流子密度n ( v )表達(dá)式,利用該表達(dá)式及相關(guān)的折射率表達(dá)式,在選擇合適的參考載流子密度n _ f后,導(dǎo)出了一個描述雙穩(wěn)所需的基本方程。
Analog temperature compensation crystal oscillator ( atcxo ) is widely used in electronic equipments such as communications , navigation , radar , mobile telephone , program control telephone , measure instruments etc . as their reference frequency source , it is critical part of the above equipments , called as their “ heart ” 模擬溫度補(bǔ)償晶體振蕩器( atcxo )廣泛應(yīng)用于通信、導(dǎo)航、雷達(dá)、移動通信、程控電話、測量儀器等電子設(shè)備中。作為基準(zhǔn)頻率源,它是上述電子設(shè)備的關(guān)鍵部件,被稱為此類電子設(shè)備的“心臟” 。