r-band 中文意思是什麼
r-band
解釋
band]r帶-
The main research works of this dissertation are aimed to design of radar waveform and the application of wavelets in ultra - wide radar, including : the design of a new kind of hybrid radar and the research of time side - lobe suppression for pulse compression, the design of receiver r adio front end in data acquisition of ultra - wide band radar, the time delay estimation based on wavelets ( packet ) analysis
本文主要進行雷達波形設計研究以及研究小波理論在超寬帶雷達中的應用，集中體現在以下幾個方面：一類新的組合雷達波形設計及壓縮脈沖時間旁瓣抑制技術研究、超寬帶雷達多通道數據採集方法中前端射頻接收部分的設計及研製、基於小波（包）方法的時延估計方法。 -
Reflecting the band s trademark sound mixed with some experimental new music styles, f. i. r. is ready to surprise its fans anew. this version comes with an exclusive f. i. r
而每一晚，趁早苗熟睡后，一馬就會偷偷上網，把每日的痛苦記載在鬼嫁日記blog裏面。 -
This work was supported by the state science and technology ministry of p. r. china under the contact no. g20000683 - 06, and by the national natural science foundation of p. r. china under grant no. 60046001. gallium nitride is one of the 3rd generation semiconductor materials. from 1990 ' s, gan has attracted more and more attention and advanced rapidly, mainly due to its direct transition, wide band gap ( ~ 3. 4ev ) and other excellent characters
Gan是直接躍遷的寬帶隙材料，具有禁帶寬度大（ 3 . 4ev ，遠大於si的1 . 12ev ，也大於sic的3 . 0ev ） ，電子漂移飽和速度高，介電常數小，導熱性能好等特點，在光電子器件和電子器件領域有著廣泛的應用前景。 -
Chapter six realizes the ka band 0 - pm t / r component on the basis of above - mentioned function parts
第六章在前述各個功能部件的基礎上實現了ka波段0 -調相收發組件。 -
P - n, n - dimethlaminobenzates ( ( ch3 ) 2nc6h4coor ) have typical ict characteristics. the ct emission and the fluorescence intensity ratio of ct band to normal band ( ict / ile ) were different in organic solvent and in the aqueous solvent with ctab micelle when the length of r group was increasing
N ， n -二氨基苯甲酸酯系列具有典型的雙熒光，從甲酯到辛酯隨著酯烷基鏈的增長，它們在有機溶劑和膠束水溶液中的熒光峰位置以及雙重熒光強度之間的比值不同。 -
This paper selects representative samples wuliangsu lake, yellow river, dongjuyan lake and ejina salina, after information is analyzed, using optimal band index oif index, spectrum characteristics curve and application scope of each band to select optimal bands. the result shows that band 3, 4, 5 are best ones and etm453 combination is the best after r, g, b composed. all this fit for western inner mongolia
根據西部區主要濕地類型本文選取烏梁素海、黃河、東居延海、額濟納鹽沼典型樣地，通過多光譜信息的統計分析，採用波段選取最佳指數oif指數並結合地物光譜特徵曲線、各波段主要用途進行最佳波段的選取，結果一致表明3 、 4 、 5波段是各典型濕地的最佳波段，可作為反映內蒙古西部濕地信息的最佳波段。 -
Chapter 5 introduce the design of the fiber data transmission card bassed on pci bus, and give the debug result of wide band digital t / r module transmission channel
第四章介紹了寬帶數字t / r組件發射通道試驗電路的fpga程序設計。第五章介紹基於pci總線的光纖數傳卡的設計以及試驗系統的測試與結果。 -
Chapter 3 introduce the circuit design of wide band digital t / r module transmission channel. chapter 4 introduce the fpga software design of wide band digital t / r module transmission channel
第三章介紹了寬帶數字t / r組件發射通道試驗電路的硬體設計，包括光纖介面電路、 ddws電路、正交調制電路的設計。 -
For the operating frequencies of modern radars and guidance 、 electronic countermeasure system 、 communication system 、 remote sense and remote measurement system expand to millimeter band step by step, the operating frequencies of t / r module raise ceaselessly. simultaneity millimeter wave t / r module which has the advantages of small dimension, lightweight, wide band is more suitable to the requirement of modern army and communication system. this paper is mainly referred to the research of t / r module in ka band
現代雷達與制導、電子對抗、通信、遙感遙測系統的工作頻率已逐步由微波波段擴展到毫米波波段，因此t / r組件的工作頻率也在不斷的上升，同時，毫米波t / r組件與微波t / r組件相比具有尺寸小、重量輕、頻帶寬等優點，更適合現代軍事和通信系統的要求。 -
The converter mainly accomplishes changing the c - band rf to intermediate frequency 70mhz, amplifying and gaining. the thesis includes r & d of local oscillator and group - delay equalizer. the thesis overall views the historical development future trend, introduces the theories, applications and characteristics
該變頻器主要完成雙通道c頻段射頻信號到70mhz中頻的變頻、放大和增益控制等功能，本文的主要工作是下變頻器中的本地振蕩器和中頻群延遲均衡器兩部分的研製。 -
As a shareholding subsidiary of “ xinchao industry ”, the listing company ( shanghai security code : 600777 ), yantai xinmu cable co ltd. is a foreign - invested high - tech enterprise in shandong province, with business covering r & d, production and operation of broad - band network lan cable and catv high physical foaming cable series under “ xinmu ” brand
新牟電纜有限公司是上市公司新潮實業股份有限公司「新潮實業」股票代碼600777的控投子公司，系山東省高新技術企業和外商投資先進技術企業，主要從事「新牟牌」寬帶網路數據電纜和catv高物理發泡同軸電纜系列產品的研製開發和生產經營。 -
Though they played mostly covers, lennon and mccartney began writing original songs together, agreeing to forever share songwriting credits, even though they only co - wrote a handful of tunes during their entire career as the beatles. by the end the year, liverpool record store owner brian epstein had become the band s manager, and quickly began trying to find them a record contract. on january 1, 1962 the beatles auditioned for decca records, performing 12 covers and three originals for a r assistant mike smith
雖然他是聽了一首貓王1956年錄制的傷心旅舍才對流行音樂產生興趣的但「 skiffle 」音樂的興起促使他在1957年3月組建他的第一個樂隊這個樂隊叫「 black jacks 」 john彈一把央求他姨媽花17鎊買的吉它而另一位成員pete shotton的樂器是搓衣板。 -
The g - and r - band patterns are found to be only about 38 % complementary
因此， za染色體和zb染色體是相同的染色體。 -
The complementarity of g - and r - band patterns was evaluated by comparing the features of each positive and negative chromosomal g - and r - band. it was found that the complementarity is only illustrated to some extent by the parts of some chromosomes
精確計算和比較每條染色體的g 、 r陽性和陰性帶紋特徵，發現有些染色體呈一定的互補性，但這種互補性在文昌魚染色體上較低，大約只有38 %的部位存在互補現象。 -
On the basis of introducing microwave components and parts basic theories in detail, this text develops ka band 0 - pm t / r component
本文在詳細介紹微波元器件基本理論的基礎上，研製了ka波段0 -調相收發組件，完成了組件的正樣設計。 -
In chapter 2, first give the theory of phased array radar. second introduce the analog t / r module and digital t / r module. third discusses some key technology of wide band digital t / r module, including ddws technology and quadrature modulate technology. at last present a scheme of l bandwide banddigital t / r module
第二章首先介紹了相控陣雷達系統的組成和工作過程，其次介紹了模擬t / r組件和數字t / r組件的組成，然後介紹了寬帶數字t / r組件的關鍵技術，包括:直接數字波形產生技術和正交調制技術，最後提出了一種l波段寬帶數字t / r組件的框圖。 -
This work was supported by the state science and technology ministry of the p. r. china under the contact no. g20000683 - 06, and by the national natural science foundation of p. r. china under grant no. 60046001. recently, gallium nitride ( gan ) as a wide band gap semiconductor has attracted more and more attention and advanced rapidly, mainly due to its promising applications in short - wave light - emitting devices, photodetectors, as well as anti - radiation, high frequency and high power electronic devices
本碩士論文是基於國家科技部重點基礎研究發展規劃項目（ 973項目）子課題「硅基寬帶隙異質結構材料生長及器件研究」 （ 2000年10月- 2005年9月， no . g20000683 - 06 ）和國家自然科學基金（ no . 60046001 ）的一部分研究工作。 -
The main work in this dissertation is as follows : 1. have presented a scheme of l band wide band digital t / r module
本文所做的工作主要如下: 1 .提出了一種l波段寬帶數字t / r組件的方案。 -
This dissertation discuss the key technology of wide band digital t / r module, including : architecture of the wide band digital t / r module ; wide band signal generating technology based on ddws ; using fiber technology to transmit data between radar center and t / r moudle. after studying the digtal t / r module technology over the world, this dissertation present a scheme of l band ( 1300mhz ) wide band ( b = 100mhz ) digital t / r module, and design a test board to verify transmitting technology of wide band digital t / r module, it works at l band. it use gigabit fiber components to transmit data between radar center and t / r module, use ddws and quadrature modulate technology to generate wide band radar transmitting signal, all control signal is generated by fpga
本文探討了寬帶數字t / r組件發射通道的關鍵技術，主要包括:數字t / r組件的體系結構、基於ddws技術的寬帶信號的產生以及數字t / r組件收發數據的光傳輸技術。本文在深入研究了國內外數字t / r組件技術的基礎上，提出了一種l波段（ 1300mhz ）寬帶（ b = 100mhz ）數字t / r組件的原理框圖，並且設計了試驗板來驗證寬帶數字t / r組件發射通道技術。該試驗板採用千兆比特光纖技術實現寬帶數字t / r組件與雷達主機的數據傳輸，採用ddws加正交調制技術產生寬帶雷達信號，採用一片fpga完成整個組件的控制。
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