行波前進原理 的英文怎麼說

中文拼音 [hángbōqiánjìnyuánlǐ]
行波前進原理 英文
principle of using travelling waves
  • 行 : 行Ⅰ名詞1 （行列） line; row 2 （排行） seniority among brothers and sisters:你行幾? 我行三。where...
  • 波 : Ⅰ名詞1 （波浪） wave 2 [物理學] （振動傳播的過程） wave 3 （意外變化） an unexpected turn of even...
  • 前 : Ⅰ名詞1 （在正面的） front 2 （次序在先的） first; top 3 （過去的; 較早的） ago; before; preceding...
  • 進 : 進構詞成分。
  • 原 : Ⅰ形容詞1 （最初的; 原來的） primary; original; former 2 （沒有加工的） unprocessed; raw Ⅱ動詞（原...
  • 理 : Ⅰ名詞1 （物質組織的條紋） texture; grain （in wood skin etc ） 2 （道理;事理） reason; logic; tru...
  1. Before using phase - only algorithm to achieve nulling, estimations of the number of interferential sources and the doa of interferential signals are needed. so, the spatial spectrum estimation basd on the maximum likelihood method ( capon method ) and music algorithm used for detecting the number of interferential sources and the doa of interferential signals are discussed in the second chapter

    在採用phase - only演算法進行波束置零之前，需要估計干擾源的方向和個數，因此本文還在第二章介紹了發射數字波束形成中用於測定干擾源個數和方向的空間譜估計法? capon演算法和music演算法的測向原理，並分析了它們的性能和優缺點。
  2. This paper starts the research of the liquid floated pendulous accelerometer testing system according to the engineering. at first, this paper gives the brief introduction of the history and present status of accelerometer and its testing technology, the working principium and math model of the liquid floated pendu - lous accelerometer, and then, decides the binary width pulse force retrim loop as the design proposal of testing system, researches the transfer function of every part in the system emphasizly, analyses the stability of the whole accelerometer testing system from the angle of control theoretics by the open loop transfer function of system, and designed the correcting net, analyses the basal problems such as resolution, sampling restraint, precision and so on, designs the hardware testing circuits such as preamplification, band - pass filter, alternating amplifier, phase sensitive demodulatorn, pulse - width modulation, frequency scale circuit, moment current generator. finally, using the graphics program language labv - iew which is designed for testing field especially by ni accomplishes the solfware design of testing system, realized the testing functions

    首先對加速度計及其測試技術的發展歷史和現狀，液浮擺式加速度計的工作原理和數學模型等作了簡要的介紹，然後確定了以二元調寬脈沖再平衡測試迴路為設計方案，並從控制理論的角度進行了分析，著重研究了系統中各部分的傳遞函數，利用系統開環傳遞函數分析了系統的穩定性，同時設計了系統的校正網路;分析了二元調寬脈沖再平衡測試迴路的解析度、采樣約束以及測試精度等基本問題，並按照系統分析的結果設計了包括前置放大、帶通濾波、交流放大、相敏解調、脈寬調制、頻標電路以及力矩電流發生器等測試系統各部分硬體電路，驗證了電路的正確性，最後按照測試系統的要求，採用了美國ni公司專為測試領域所開發的虛擬儀器工具? ? labview作為測試軟體開發工具，利用該圖形化編程語言完成了測試系統軟體部分的設計，實現了測試功能。
  3. The writer studies the developed steps of real estate industry in the above - mentioned period and describes its generation mechanism, characteristics and cause of business cycle fluctuation of real estate industry in the period of our economy system shift. it is necessary to point out that policy cycle fluctuation should be a fundamental cause on business cycle fluctuation of real estate industry in china. writer here jumps at the conclusion that the recovery phase and depression phase of business cycle in our real estate industry should be later than the expansion phase and decline phase

    該部分內容由第3章構成，即從房地產經濟周期波動的一般研究轉到對我國房地產經濟周期波動進行分析，從總體上看，改革開放以來我國房地產業的真正形成與發展只有20年的歷史，通過對這一短時期中國房地產業發展的探討，指明轉軌時期中國房地產經濟周期波動的一些主要特點，同時指出我國房地產經濟周期波動形成機制與原因，當前我國經濟轉軌時期，政策周期波動是房地產經濟周期波動的根本原因，並從理論角度分析了房地產經濟周期波動與宏觀經濟周期波動在各個階段間的相互關系，得出我國房地產經濟周期相對于宏觀經濟周期波動來說在復甦期和蕭條期滯后，但高漲期和衰退期卻先行的結論。
  4. The carrier wave is modulated directly by the baseband signal at several frequency point in l band and s band. firstly, this paper clarifies the theory of i / q modulation, elaborates evm and acpl, and analyzes the effect of amplitude and phase unbalance and dc offset on evm. secondly we review the basic principle of phase locked loop and it ’ s composing parts, including the basic conception and design method of pll frequency synthesizer, especially introduce the charge pump pll frequency synthesizer in detail

    首先，在闡述i / q正交調制基本原理的基礎上，通過對誤差矢量和鄰近通道功率泄漏的詳細分析，定性、定量地討論了各種非理想電路因素（如相位不平衡、幅度不平衡、直流偏差等）對調制器性能的影響;其次，介紹了鎖相環的工作原理和基本組成部分，包括鎖相環的設計和環路濾波器的設計，特別詳述了電荷泵鎖相頻率源;第三，介紹了採用直接調制技術模擬衛星信號的射頻前端的設計;最後，對整個直接射頻調制系統進行測試，結果基本上達到了課題要求。
  5. 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。
  6. The principle, theory, realizing methods for holographic lithography as well as the pattern transfer mechanism among the traditional photomask - hologram mask - resist have been deeply investigated. an experimental system with total inner reflection wavefront conjugation holographic lithography using right angle prism and refractive index matching liquid is designed and built, and the experimental research is carried out

    對全息光刻的原理、理論、實現方法及傳統光掩模?全息掩模?抗蝕劑圖形傳遞機理進行了深入的研究，設計和建立了採用直角棱鏡和折射率匹配液的全內反射波前共軛全息光刻實驗系統，進行了實驗研究。
  7. The object of the paper is wavefront aberrometer produced by nanjing university of aeronautics and astronautics and su zhou 66 vision - tech co., ltd. the principle of aberrometer are detailedly introduced, image processing and automatic track techniques are also researched. according to research result, relevant control software has been developed in this paper, the conceptions of aberration are firstly described, synchronously, image processing and automatic track system are analyzed

    論文以南京航空航天大學與蘇州六六視覺科技股份有限公司合作研製開發的人眼波前像差儀為研究對象，系統論述了人眼波前像差儀原理，重點對其中的關鍵技術? ?圖像處理與自動跟蹤進行了詳細研究，並開發出了相應的系統控制軟體。
  8. Point diffraction interferometer - a physical idea, is invented by smartt and strong in 1972, advanced by smartt and steel, and used to test astronomical telescope, it has simple structure and has not special demand to source. recently. with the development of fiber ' s manufacture and coupling technology. the simple modern fiber ' s center is smaller than before, this make it possible to progress fiber point diffraction interferometer ( pdi ), in addition to test convergent wavefront, it can test the reflective concave. the excellence of pdi is that it does not need standard mirror. in intereference testing, the standard mirror is the main reason which limit the improvement of precision, pdi can avoid difficulty to provide the wide future for high precision testing. pdi, which produce the standard sphere wavefront, is an instrument which realize the phase shifting with piezoelectric transducer ( pzt ), and collect the interferogram with ccd, in this paper, a adjusting methord is described, then data processing is obtained

    點衍射干涉儀這一物理思想，早在1972年smartt和strong就已發明，由smartt和steel做了進一步發展，並成功的用於檢測天文望遠鏡，它結構簡單，對光源沒有特殊要求，近年來，由於光纖製造工藝以及耦合技術的發展，單模光纖纖芯不斷縮小，為光纖點衍射干涉儀得以發展提供了前提條件，該干涉儀由激光照明，除了檢測會聚波前外，還可以用來檢測反射凹球面，進而應用到單個面形的檢測；另外，光纖點衍射干涉儀最大的優點是不需要標準鏡，在干涉檢測中，標準鏡是檢測精度受限的很大原因，光纖點衍射干涉儀能繞開這一難度，為進行高精度的光學檢測提供了廣闊的前景。
  9. My thesis has three parts : in part 1, i briefly introduce the background of the selected title, the goal of research and research meaning of this text. i mainly study the concept, the theory putted forward by the economists about the reason causing economic fluctuation and the macroeconomic control to economic fluctuations. in part 2, i regard chinese economic cycle as the observing object, using the traditional method and economic mathematical model to measure and analyze chinese economic cycle systematically since the reform, then i study the nature, characteristic and main influencing factor of chinese economic fluctuations since the reform of 20 years

    本文的研究工作主要由三部分內容組成：第一部分首先簡要介紹了本文的選題背景、研究的目標和研究意義，然後重點考察了經濟周期的概念、各國經濟學家解釋經濟周期發生原因的一般理論以及經濟周期波動的宏觀調控等內容；第二部分主要以改革開放以來中國經濟周期波動為研究對象，運用傳統方法和經濟數學模型對這一時期中國經濟的周期波動進行了詳細、系統地測定，並考察了改革以來中國經濟周期波動的性質、特徵以及主要影響因素；第三部分重點分析了中國經濟波動的真正原因及其傳遞機制，並在前文研究的基礎上，依據「反周期」理論探討了對中國經濟周期波動進行調節的基本思路和對策。
  10. In this paper, we summarize the present testing level of optical aspheric surface, expound the principle of laser wavelength scanning interference testing method, and analyze the laser that can be tuned, and we also study the change of wavelength. further more, we achieve the elementary design of experiment device, curtly introduce the method for interference fringe processing and image processing by matlab

    本文對目前國內外的光學非球面的測量現狀作了概略的敘述，給出了激光波長掃描干涉測試方法的原理，對波長可調諧的激光光源進行了分析，對激光器波長的變化進行了研究，對實驗裝置進行了初步的設計，對干涉條紋圖處理方法進行了研究，並通過編寫matlab軟體語言對干涉圖進行了數字化處理。
  11. In this paper, we summarize the present testing status of optical aspheric surface, expound the principle of laser wavelength scanning interference testing method, and analyze the laser that can be tuned, and we also study the change of wavelength. further more, we achieve the elementary design of experiment device, and curtly introduce the method and principle for interference fringe processing

    本文對目前國內外的光學非球面的測量現狀作了概略的敘述，給出了激光波長掃描干涉測試方法的原理，對波長可調諧的激光光源進行了分析，對激光器波長的變化進行了研究，對實驗裝置進行了初步的設計，並對干涉條紋圖處理的方法和原理進行了簡單的介紹。
  12. In fact, hartmann - shack wavefront sensor is affected by the noise of ccd and the constructed error too. in our compare, a bridge is setup, which is the original wavefront composed by zernike polynomial, we transform the original wavefront into far field. then we can compare the accuracy of hartmann - shack wavefront sensor with the accuracy of the system of far field diagnosis in detecting the farfield, using diffraction limit and encircle energy

    我們在進行兩者相互比較的過程中，搭建了一個比較的橋梁，即由zernike多項式組成的各種原始像差波前，將它也變換到遠場作為原始理想遠場光斑，然後，以它的衍射極限和環圍能量曲線作為評價標準，比較hartmann - shack波前傳感器和遠場測量系統在光束質量診斷中的探測精度。
  13. Furthermore, it can not give the electric signal relative to wavelength, so it is not fit for the auto - controlling in the industry manufacture. many researchers focus on the demodulating bragg wavelength and achieve some demodulation technologies. the paper presents several demodulation technologies used commonly at home and abroad

    論文介紹了幾種目前國內外較為成熟的解調技術，並對這些解調技術的實驗原理和優缺點進行了分析，通過比較得出:可調諧f - p腔濾波解調法具有體積小、精度高、價格低廉、穩定性好等眾多優點，適合於實際工程使用，有廣泛的應用前景。
  14. In this paper, a pll frequency synthesizer working in l band is researched. at fist, we review the basic of phase lock loop and it ' s constituent part. after that the basic conception and design method of pll frequency synthesizer was introduced, especially introduced the charge pump pll frequency synthesizer in detail

    本文是採用鎖相原理設計的l波段頻率合成器，首先對鎖相環路的工作原理和基本組成部分進行了簡單的介紹，然後介紹了鎖相頻率合成器的原理和設計方法，主要介紹了目前小型頻率合成器產品中使用最廣泛的由電荷泵數字鑒頻鑒相器和無源環路濾波器構成的頻率合成器。
  15. Then, the optimization technology of the data business and handoff between different carriers are analyzed in detail secondly, finally intensive study is made on how to optimize these problems. on the base of the basic theory of the data business optimization and the handoff between different carriers, this paper synthesizes some popular network optimization method

    本文最後從數據業務優化和異頻切換優化的基本原理出發，綜合目前流行的一些網優方法，對桂林聯通多載波cdma網路的優化進行了應用與研究，結果表明在現網中多載波網路中的數據業務和異頻間切換的優化是成功的。
  16. This thesis has studied the sar raw signal simulator scheme of distribute targets. by comparing of the theories and designs of in existence simulators and combining of the simulated sar raw data of ocean surface, we improved the former scheme of distribute targets simulator. the new scheme is more flexible than the old one

    論文開展了分佈目標回波模擬器的方案研究，對比了已有的回波模擬器的原理和基本方法，並結合作者研究海面sar回波信號的結果，對前人的分佈目標回波模擬器的方案進行了改進，使之具有更大的靈活性。
  17. First of all, this paper introduces the principle and characters of laser diode and analyses the necessity of designing a special driver power with high quality by referring a lot of domestic and foreign references. then the power with soft - start function and low ripple is designed according to the demand of a laser driver and relevant technology. it makes a laser diode work drive by ic - wkn and emit stable laser

    首先，本文對半導體激光器的原理和特點進行了介紹，在查閱了國內外相關文獻資料的前提下，分析了半導體激光器對電源的要求，並結合開關電源中的相關技術，設計製作了具有慢啟動功能和低紋波系數的驅動電源，通過ic - wkn的驅動，使半導體激光器正常工作，發出具有穩定功率的激光。
  18. The nonlinear influence on multiple carriers signal, such as am / am and am / pm conversion, has been analyzed in this paper. some common linearization techniques, such as feedback, feed - forward and pre - distortion, have also been introduced and compared, which shows that feed - forward is the preferred linearization approach for application in this paper

    本文分析了微波功率放大器的非線性特性，特別是am / am轉換和am / pm轉換對多載波信號的影響，也介紹了反饋、前饋、預失真等各種常用線性化技術的基本原理，並對它們的優缺點進行了比較總結。
  19. The methods of data association and tracking beginning and ending to single and multiple targets tracking in the multi - echo environment is listed. at the end of the thesis, a method is introduced, which is that based on the most closed principle, without the chosen echo, the current forecasting values added yawp based upon the former state values is considered as the target state estimated value. the value is an input of observation equation, the output of the observation equation is considered a chosen echo. and the method is validated in the simulation results

    針對多目標跟蹤問題，首先對多目標跟蹤的原理和跟蹤門的形成方法進行了概述，並對多回波環境下單目標跟蹤和多目標跟蹤的常用的數據關聯方法和跟蹤起始、跟蹤終結方法進行了介紹，在本文的後半部分，對多目標的運動狀態進行了模擬研究，提出了一種目標狀態估計方法，該種方法的思想是當前時刻如果目標跟蹤門內沒有所期望的候選回波，首先計算出目標在前一時刻的運動狀態下對當前時刻的預測值，並將該值疊加上系統噪聲作為量測方程輸入值，然後將觀測值作為候選回波對目標進行狀態估計。
  20. Principle of using travelling waves

    行波前進原理
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