swr 中文意思是什麼

swr 解釋
德國西南廣播
  1. Swr standing wave ratio test procedure for electrical connectors and sockets

    電連接器和插座的駐波比
  2. Under the support of federal aghcuiturai research center ( fal ) of germany, a series of experimeflts had been done to compare swr sensor with tdr sensor made by germany and fd sensor made by holland. the results showed that the performance of the swr sensor is as good as other sensors. ln addition, the result further showed that the swr sensor have excellent results in every kinds of soil texture

    在德國聯邦農科院的技術與生物系統研究所（ fal ）的資助下，做了swr型與tdr型、 fd型土壤水分傳感器的性能對比研究，結果進一步表明swr型土壤水分傳感器的測量結果不僅受土質的影響不明顯，而且說明swr型土壤水分傳感器的性能與國外同類傳感器相當。
  3. First, the theory and structure of swr is expounded, then software and hardware models of the base station, which use the sdr structure of wideband and band - pass sampling in if ( intermediate frequency ), are put forward

    首先介紹了軟體無線電的概念、特點、基礎理論和基本構成，推導了軟體無線電的數學模型，然後在此基礎上詳細討論了基於寬帶中頻帶通采樣軟體無線電結構的移動通信基站的硬體和軟體的設計方案。
  4. Recently, train is running faster and faster, and considering the stability and security, seamless welded rails ( swr ) are used as the train orbits gradually. the temperature of the rails will vary with weather. so that the rails may release the energy due to the metal characteristic of expanding or contracting with temperature, there is some badly distortion in the swr, worsly occurring accidents on expanding orbits. the portrait thermal stress ( pts ) of the swr should be monitored in some parts regularly, as to avoid such accident

    近年來，隨著火車的提速造成的穩定和安全問題，軌道逐步轉為採用無縫焊接鋼軌，隨著鋼軌溫度的變化，無縫鋼軌可能會因為熱脹或冷縮的金屬特性並且在扣件阻力小而且路基較差的路段釋放能量，可能會發生鋼軌嚴重變形，更甚者會發生脹軌跑道等嚴重鐵道事故，為了避免發生如此事故，有必要定期對鋼軌的溫度應力進行檢測。
  5. For solving this problem, there are several ways of measuring the pts of the swr at present, such as demarcating path length, strain and stress, magnetic induction measurement and ultrasonic measurement. however, portable, universal and effective instruments or methods don ’ t appear up to now in china

    為了解決這個問題，目前已經有了多種檢測鋼軌溫度應力的方法，比如為標定軌長法、應變法、磁感應測量法和超聲波測量法，但是在我國，便攜、通用有效的檢測儀器或方法還沒有被研製出來。
  6. This article describes a way of special ultrasonic system which monitors thermal stress in seamless welded rails. this monitoring system is a non destructive testing system, which adopts avr mcu and high - precise time chip processing as the core of it, and adopts the critically refracted longitudinal wave as the object of measuring. my studying focuses on the theory of the monitoring system, which will be listed in this arctile : according to the snell theory, the theory of motivating of critically refracted longitudinal wave is described in details, and the finite element software is used to emulate the propagating course. the formulas of calculating the pts of swr are taken from the acoustoelasticity theory, and the calculating the parameters is introduced. according to assemble materials, three kinds of ways of monitoring the pts of swr using critically refracted longitudinal wave are described, which are measuring the sound - time in changeless distance, ultrasonic critical - angle refractomery and frequency spectrum, the first way of ways is used in this experiment system. the factors, which effect the monitoring system, are assaid in some degree based

    本文的研究工作重點在無縫焊接鋼軌溫度應力測量系統的理論模塊，包括根據snell原理，研究極限折射縱波的激發機理，並使用有限元軟體ansys進行模擬;根據聲彈性理論以及公式推導出計算無縫焊接鋼軌中的溫度應力的公式，並對其中參數的求解方法進行介紹;根據收集的資料，介紹了三種使用極限折射縱波測量無縫焊接鋼軌溫度應力的方法，即固定距離測量聲時法、臨界角折射法和頻譜分析法，本實驗系統使用的是第一種;根據實驗經驗以及相關資料，分析了影響極限折射縱波測量溫度應力的幾個因素，並提出了相應的解決方法;根據實驗系統的需要，獨立設計並加工出相關配套的實驗設備，包括實驗鋼塊、有機玻璃楔塊、固定件、載荷外框裝置等。
  7. Large amounts of lab experimellts showed that the consistency of swr sensor is very good, and the swr sensor have excellent results in every kinds of soil texture, especially in loam, clay and acid loam. there were not big variations among their measurement results

    特別是壤土、粘土、酸性粘壤土等土質對測量結果的影響達到了極不顯著的水平，它們之間測量值的相關系數都達到了0 . 97以上。
  8. Verification regulation of rf swr bridge

    高頻駐波比電橋檢定規程
  9. On the base of the traditional bpm - i, ii time receiver, and by the deeply studied of the theory of software radio ( swr ) and time receiver, we present the short - wave time receiver design on the concept of software radio

    本文建立在傳統的短波定時接收儀的基礎上，通過對授時接收機和軟體無線電理論的深入研究，提出了一種新的軟體無線電概念下的短波定時接收機的實現方案。
  10. ( 2 ) experiment analysis of swr soil moisture sensor because of cropland information excessive, ca n ' t experiment everyone, penman process soil containing water or moisture data experiment to vegetable terras cropland and gravel, prevailed experiment data, and draw experiment curve drawing of differ soil

    （ 2 ） swr型土壤水分傳感器的試驗分析由於農田信息繁多，不能一一研究，故筆者只對菜地、田間、礫石地分別進行了土壤含水量試驗，獲取了試驗數據，並繪出了不同土質的試驗曲線圖。
  11. In this dissertation, a key point of the study is to build up a mathematical model of the character impedance the swr sensor. the structure of four equal - length probes can be viewed as a special form of coaxial hansnussion line. combining the character impedance of coaxial and the para1lel transmission line, the character impedance model of probe with eqtlaling length was built up by utilizing mathemaical theory of approach

    本文將四針等長式結構的土壤水分探頭看成是同軸傳輸線的特殊形式，從標準傳輸線特徵阻抗入手，結合平行傳輸線，運用數學上常用的夾逼定理，得出了四針等長結構的土壤水分探頭特徵阻抗數學模型，由此提出swr型土壤水分四針不等長探頭的特徵阻抗數學模型。
  12. 5. to meet the needs of soi1 moisture monitoring and vanabie irrigation, a measurement system, named model tsciv intelligent monitor, for measuring the spatial distributions of soil moisture was developed. swr - based soil moisture sensor was combined or connected with ag132 global positioning system ( gps ) in the system

    本文從土壤墑情監測和指導田間變量灌溉的要求出發，研製開發了連接ag132gps接收機和swr型土壤水分傳感器的tsc型智能化土壤水分空間分佈速測儀樣機，完成了gps數據的接收與處理、土壤水分的採集與保存等工作。
  13. As part of the nationa1 " 9 ' 5 " key project ( no. f 96 - a23 - 02 - 010 ) on instrumentation supported by the ministry of science & technology ministry this study took the behavior of soil - water - system dielectrics as a key point for further development and evaiuation of a new kind of standing wave ratio ( swr ) soil moistufe measuring system. a series of academic analysis and a lot of experiment research on swr4ased soil moisture sensor were catried out and presented in this paper. on the basis of the research, a new soil moisture sensof, which it is very suitab1e for field use, was developed

    本文在國家科技部「九五」儀器儀表攻關項目的資助下（專題號： 96 - a23 - 02 - 010 ） ，以土壤介電特性為研究的鍥入點，對基於駐波率原理（ standingwaveratio ? swr ）的土壤水分快速測量方法做了系統的理論分析和深入的性能分析研究，為研究開發成功swr型土壤水分測量傳感器奠定了基礎，同時研製出與全球定位系統（ gps ）聯合使用的土壤水分空間分佈速測儀樣機。
  14. The lna is one of the most important and broad components in microwave communication system receiver, and is used to amplify the low level signal. as the first signal processing block after the antenna, the lna determines the noise figure and input voltage swr and greatly impacts the dynamic range

    低噪聲放大器（ lna ）廣泛應用於微波接收系統中，是重要器件之一，主要用來放大低電平信號，由於是自天線下來第一個進行信號處理的器件， lna決定了整個系統的噪聲性能和電壓駐波比vswr ，並對動態范圍有著較大的影響。
  15. Swr special work request

    特殊工作需求
  16. It can provide some reference worth to develop the application research of swr

    本文的研究工作對開展軟體無線電的應用研究具有一定的參考價值。
  17. And then, the character impedance model of swr probe was built up and validated by experiments

    研究swr型土壤水分傳感器的測量敏感度是本文研究的另一重點。
  18. In this thesis, the application of swr in the base station based on mobile communication is studied

    本文對軟體無線電在移動通信基站中的應用進行了深入研究。
  19. Software radio ( swr ) is a kind of new radio communication architecture which was first proposed in 90 ' s in last century

    軟體無線電是在20世紀90年代初提出來的一種新的無線通信體系結構。
  20. Software radio ( swr ) can make the wireless communication system have a good flexibility and generality. also, the interconnection and update of the system will be very convenient

    軟體無線電可以使無線通信系統具有很好的通用性和靈活性，方便系統的互聯和升級。
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