直線頻譜 的英文怎麼說

中文拼音 [zhíxiànbīnpǔ]
直線頻譜 英文
straight-line-spectrum
  • 直 : Ⅰ形容詞1 （成直線的; 硬挺的） straight; stiff 2 （跟地面垂直的; 從上到下的; 從前到后的） erect; v...
  • 線 : 名詞1 （用絲、棉、金屬等製成的細長的東西） thread; string; wire 2 [數學] （一個點任意移動所構成的...
  • 頻 : Ⅰ形容詞（次數多） frequent Ⅱ副詞（屢次） frequently; repeatedly Ⅲ名詞1 [物理學] （物體每秒鐘振動...
  • 譜 : Ⅰ名詞[書面語]1 （按類別或系統編成的書或冊子等） table; chart; register 2 （指導練習的格式或圖形）...
  • 直線 : 1. （不彎曲的線） straight line2. （急劇的） steep; sharp
  • 頻譜 : frequency spectrum; frequency content; spectrum; power density spectrum; power spectrum; [系統] s...
  1. In recent years, the worldwide researchers pay much attention to fourier telescopy. it is an active imaging technique that encodes the information in the temporal instead of spatial domain, then receives the speckle and deposed of it to reconstruction the object image. now, the high - resolution technique is under the condition of deeply researched

    它是一種主動式干涉成像技術，這一技術通過時域內的相位的調制完成直線條紋對目標的掃描，從而達到對深空目標頻譜的抽樣，然後接收其散射回波，對回波信號進行處理，進而還原出目標的像。
  2. This paper mainly focuses on the noise limiting by means of the direct sequence spread spectrum ( dsss ) and the analysis of the transmission performance of the plc and some digital modulation technology. the contents of the paper is as follows : 1 ) the technical feasibility is proved after simulating noise limiting principle of dsss by means of systemview, the simulation software ; 2 ) a kind of band pass filter ( bpf ) is realized according to the requirement of filter and the principle of butterworth approximation, which satisfies the index of performance of dsss. 3 ) the low voltage plc system includes the sc1128, the specific modulation / demodulation ic, the bpf filter and other circuit components, furthermore, the control function of system is realized by means of the personal computer and the microcontroller

    本課題在對低壓電力線的傳輸特性和數字調制技術進行分析的基礎上，將通信理論中的直接序列擴頻技術（ dsss ）用於解決低壓電力線通信的干擾問題，主要研究內容如下： （ 1 ）用通信模擬軟體systemview對dsss技術的通信和抗干擾原理進行模擬分析，分別對時域和頻域下採用dsss技術前後接收信號的頻譜進行分析，驗證dsss技術在本系統中的可行性； （ 2 ）由dsss技術對濾波系統的要求，根據濾波理論分析了巴特沃思型濾波器的逼近原理並設計了合適的濾波電路； （ 3 ）用調制解調晶元sc1128和自行設計的濾波器加之輔助外圍電路，構造出低壓電力線載波通信系統，並採用atmel公司的單片機設計了接收和發射電路的微控制器； （ 4 ）分別對採取抗干擾措施前後輸入和輸出信號進行對比實驗，並對結果進行分析，驗證了dsss技術對干擾信號的抑制作用。
  3. Electromagnetic compatibility and radio spectrum matters - maritime mobile earth stations operating in the 1, 5 ghz and 1, 6 ghz bands providing voice and direct printing for the global maritime distress and safety system - technical characteristics and methods of measurement v1. 1. 1

    電磁兼容性和無線電頻譜情況.全球海上遇險呼救與安全系統用提供聲音和直接列印的工作頻帶為1 . 5ghz和1 . 6ghz的海上移動地面站.技術特性和測量方法
  4. This paper designs an in - building power line dsss communication system after analyzing the properties of power line channel in detail

    本文在對電力線通道特徵詳細分析的基礎上，設計了室內電力線直接序列擴展頻譜通信系統。
  5. A remote record system is designed using integrated circuit based on direct sequence spread spectrum carrier communication technology and can transfer data from the sender to the receiver via low voltage power line

    本文應用擴頻晶元設計了一種遠程抄表系統，它採用直接序列擴展頻譜通信技術，以低壓電力線作為媒介進行通信。
  6. In the text, direct sequence spread spectrum signal ( dsss signal ) is the main object, and some nonlinear methods based on chaotic theory, used in the prediction of signal and detection of signal is studied

    本文以保密通信中廣泛使用的直接序列擴展頻譜信號（ dsss信號）為主要對象，研究了一些基於混沌理論的非線性的方法在信號預測和信號檢測中的應用。
  7. Stochastic resonance ( sr ) is a counterintuitive phenomenon of nonlinear dynamic systems wherein the noise ( stochastic force ) plays a constructive role. this phenomenon has then attracted much attention in the past two decades, and it has been observed that sr can occur in a wide variety of systems

    隨機共振現象是非線性動力學系統中的一種反直觀的現象，當一個非線性動力學系統受到一個隨機力（噪聲）的激勵，也就是系統輸入具有一個連續的頻譜，系統和輸入的隨機激勵之間會產生一種協同作用，使得系統輸出的性能有所提高，這一現象被稱為隨機共振。
  8. Telecommunications - electromagnetic compatibility and radio spectrum matters - electromagnetic compatibility standard for radio equipment and services - part 23 : specific conditions for imt - 2000 cdma direct spread base station radio and ancillary equipment

    電信.電磁兼容性和射頻頻譜管理.無線電設備和業務電磁兼容性標準.第23部分: imt - 2000 cdma直接擴譜基地臺無線電設備和輔助設備的特定條件
  9. Our main work is as following : ( 1 ) research many methods to estimate blur parameter, carefully analyze the blur function of straight line motion with constant velocity, put forward a method to estimate blur parameters by zero value points according to the blurred images " spectrum

    主要工作如下： （ 1 ）研究了多種估計退化參數的方法，並仔細分析了勻速直線運動模糊圖像的退化函數，根據其頻譜的特點提出了用零值點方法來估計退化參數。
  10. We revised frequency spectrum functions by using weighting factor - the distance between direct component and alternating component, and improved the acuity of focus measure curve

    提出用交流分量到直流分量的距離作為加權因子對頻譜評價函數進行改進，有效地提高了對焦評價曲線的靈敏度。
  11. When estimating frequency with the fft, the resolution and accuracy are limited by the observation time of the signal, i. e., a / = it. the level measurement accuracy of the fmcw radar is determined by the bandwidth of the transmitted signal

    掃頻帶寬1 . 5ghz ， fft兩條譜線的間隔對應的距離為10cm ，而液位測量系統的精度要求達到1mm ，因此直接利用fft頻譜估計距離顯然無法達到精度要求。
  12. Utra fdd en electromagnetic compatibility and radio spectrum matters - base stations, repeaters and user equipment for imt - 2000 third - generation cellular networks - part 2 : harmonized en for imt - 2000, cdma direct spread utra fdd covering essential requirements of article 3. 2 of the r tte directive v2. 2. 1

    電磁兼容性和無線電頻譜情況. imt - 2000第三代細胞網路用基站中繼器和用戶設備.第2部分:包括r tte指令3 . 2條款的基本要求的imt - 2000的cdma直接擴展
  13. Recently spread spectrum technique has been used widely in wireless data communication, cellular mobile communication, military communication and telemetry monitor system with resistance to interference, high usage of spectrum, resistance to multi - path fading, so investigators in communications field pay more attention to the technique, especially direct sequence spread spectrum ( dsss ) technique

    近年來，擴頻技術以其抗干擾能力強、頻譜利用率高、抗多徑等優越性能在無線數據通信、蜂窩移動通信、軍事通信以及遙測監控系統中獲得了廣泛的應用，並日益受到通信領域研究人員的重視，特別是直接序列擴頻技術（ dsss ） 。
  14. Multicarrier wireless communications have been widely investigated in the past decades. recently, two - dimensional spread spectrum ( 2d - ss ) system has drawn a lot of attention because of its full utilization of spreading characteristics in the frequency domain and time domain. compared with multicarrier code division multiplex access ( mc - cdma ), 2d - ss system can effectively mitigate multiple access interference ( mai ) due to spreading in the time domain

    當前多載波無線通信技術得到了廣泛的研究，二維擴頻通信系統是近年來提出的新的擴頻通信方式，由於二維擴頻系統從時域和頻域上分別對數據信號進行頻譜擴展，因此它同時具有時域擴頻和頻率擴頻通信系統的特點，是對傳統的一維時域直接序列擴頻和多載波擴頻的推廣。
  15. Utra fdd en electromagnetic compatibility and radio spectrum matters - base stations, repeaters and user equipment for imt - 2000 third - generation cellular networks - part 3 : harmonized en for imt - 2000, cdma direct spread utra fdd covering essential requirements of article 3. 2 of the r tte directive v. 2. 2. 1

    電磁兼容性和無線電頻譜情況. imt - 2000第三代細胞網路用基站中繼器和用戶設備.第3部分:包括r tte指令3 . 2條款的基本要求的imt - 2000的cdma直接擴展
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