行波發射機 的英文怎麼說
中文拼音 [hángbōfāshèjī]
行波發射機
英文
travelling-wave tube transmitter-
To keep the environment people live in, we should restrict or prevent many kinds of pollution, which includes electromagnetic radiation pollution. while we are considering setting up base station or evaluating the electromagnetism pollution of environment, we can measure on the spot. to save time, hard work and cost taken by measuring on spot, it is necessary to calculate and analyze the electromagnetic wave propagation in urban area
在對現有電磁輻射源（如移動通信基站、廣播電視發射天線等）環境電磁污染狀況進行評估時可以進行實地測試，但是對在建或擬建的輻射源則不可能進行先測試，同時為了避免實地測試的費時、費力和較大的測試費用，通過計算機來計算分析城市環境電波傳播顯得很有必要。Petrol, efi engine, high roof, auto door ( gliding type ), clock, air conditioner, amfm radio & cassette wmicrophone, rear under mirror, rear window defogger, curtain, 30 seater with passenger seat belt, bag rack, full wheel cap, high mount stop lamp, refrigerator ( c ) brand new toyota lhd coaster 29 seats, diesel
，汽油，電子燃油噴射發動機，高頂，手動波，自動門（飛機門） ，鐘，原廠空調，收錄機連咪，尾鏡，尾發熱線，窗簾，乘客座位安全帶，行李架，大轆cap ，尾高掛剎車燈，冰箱，排氣規制對應發動機，車尾霧燈，緊急用具（錘子） ，尾輪胎強化This has since been confirmed by russian sources ; the transmitter consists of two swept - frequency generators of sinusoidal voltage and two parallel horizontal grounded antennas, each about 60 km long
這一點被來自俄方的消息所證實；發射機有兩個掃頻發生器，產生正弦波，同時有兩幅相互平行的水平地面天線，每個天線有60千米長。The modified traveling wave monopole model is employed in simulating the electron beam in crt of computer vdu. meanwhile acceleration fields of the electron beam are studied in details and its expression given for the first time with measured results. a novel analyzing method is proposed to study the spectrum of electromagnetic information leakage based on the viewpoint of field point, which has been verified effective by experiments
採用經修正的行波單極子模型模擬計算機陰極射線管顯示器電子束，並詳細研究了電子束的加速場，首次給出了其計算公式和實驗測試結果；還提出了一種新的從場點出發的信息電磁泄漏頻譜分析方法，實驗證明了其有效性； 3The results show that the influences of duration and amplitude of stress wave on spallation process of rock under stress wave loading are important ; and stress wave with different waveforms is characteristic of different stress values and different stress loading ratios during the same period of time, which brings about the comprehensive effect when difform stress wave is loaded to medium
通過對不同應力波延續時間、不同應力波峰值和不同應力波波形下應力波誘發層裂過程的數值分析，對應力波反射誘發層裂的規律和機制進行探討。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。In principle, ultrasonic sensors are suspended over a road, which keep emitting pulse signals periodically to nearby and feed back waves to decide existence of any obstacles, thus to detect the speed, height, length, different sizes ( heavy, medium and small ) of moving vehicles and accumulative flow as well as length of motorcade. optionally, it can be applied to multitude driving lanes simultaneously for traffic data. by integrating and analyzing these measured data, the necessary figures concerning traffic flow may be obtained, which are fundamental basis guiding road buildings
本課題設計的是一種懸掛式超聲波車流多信息檢測器，通過懸掛于路面上方的超聲波探頭向路面周期性地發射脈沖信號，利用地面回波來判斷遮擋物地存在，可用於檢測行駛中的機動車車速、車高、車長、大中小分型以及累計車流量、車隊長度等信息，並可用於多個車道車流信息的同時檢測，綜合這些測量參數可獲得車流量的必要數據，可為公路建設提供必要的基礎依據。This paper studies the characteristic of scatter from moving target in the situation of bistatic sar with stationary transmitter. the wvd method is used in the paper to estimate the doppler frequency parameter of the moving targets ; the wvd - radon method is used to restrain the cross - term. then we can use the result to adjust the parameter of the filter, and to achieve the moving targets imaging of bistatic sar
本文分析了發射機固定的雙站sar情況下的運動目標回波信號模型，應用wvd變換對發射機固定的雙站sar回波的多普勒信號參數進行估計，並採用wvd - radon變換來抑制wvd的交叉項，以調整濾波器參數，實現發射機固定的雙站sar對運動目標聚焦成像。In chap. 2, the observational characteristics of the radio burst of the bastille event were discussed in detail. in chap. 3, we described the associated foundational theories with the model of a magnetic - mirror loop, consisting of the flux duct, the magnetic reconnection, the plasma wave, the wave - wave interaction and so on. then in chap. 4, using the model of magnetic - mirror loop to estimate quantitatively, we obtain the magnetic field strength, the number of solitons in a single fiber source, the volume of the source and the ducting parameters
對疊加於太陽射電型爆發上的精細結構，作出了觀測特徵分析，發現大多數纖維結構的觀測特徵在米波段和分米波段是相似的，由此提出它們可能源於相似的輻射機制，並採用磁鏡環模型，首次對分米波段的纖維結構進行分析計算，推算了纖維輻射源區磁場強度大小及輻射源的空間尺度，且相關物理參量的推算量級與其他人的研究工作結果是一致的，從而對該爆發源區的物理環境及過程有了進一步深入的認識。Based on the theoretical analysis and experimental researches, it is presented that the wider spectra are resulted from the many fluorophores with large numbers of vibrational energy levels on the ground level in the blood cells, and the reduction of the spectral intensity is due to the reabsorption of the blood cells and the energy transfer of the collisions between the fluorophore and another one or other macromolecule. on the other hand, when the concentration of the blood cells is increased, the reabsorption of the blood cells, the secondary fluorescence due to the reabsorption and the influence of the concentration on the energy levels of fluorophores are all the factors of the red - shifted spectral peaks
在進行理論分析和研究的基礎上，提出了因血細胞中存在多種熒光團，且這些熒光團的電子能級上又存在大量的不同的振動能級，從而導致被激發的熒光團發出較寬的熒光光譜；血細胞濃度的增大，熒光團以及其他大分子之間的距離變小，造成它們之間因碰撞的能量轉移概率加大，因而易產生熒光猝滅，結果導致熒光強度的變小；血細胞溶液中重吸收所導致的熒光猝滅和二次熒光發射，以及血細胞濃度的變化對其中熒光團能級系統的影響都是導致熒光峰值波長「紅移」的原因；進而研究了led光誘導血細胞產生熒光光譜的機理。It can be used in any complex environment, can locate all paths from transmitter to receiver which avoid redundant calculation, and it is a standard 3 - d forecast model ; in addition, it is a point to point ray tracing method based on specular theory which do n ' t carry out the receive test ; furthermore the model adopt the reverse arithmetic which exert the tree concept in data frame and establish a virtual fountain tree permanently, the proagmme can back - search the virtual fountain tree when it is running. these operation increase the calculate speed and it result in the higher receive efficiency and precision. the thesis design a programme to compare the prediction results based on ray tracing method of virtual fountain tree between the measurement results and prediction results based on the other transmittion models. the comparsion result indicate the new model is a better model
它可應用於任何復雜的傳播環境中，能找到發射機到接收機之間的所有電波傳播路徑而無須冗餘的計算，是一種準三維的預測模型；另外，從本質上講，它仍然是一種基於鏡像理論的點對點的射線跟蹤法，所以它無須進行接收測試；而且由於採用了反向演算法，運用數據結構中多叉樹的概念，先確定需要計算的場點位置，找出所有能從源點到達場點的射線，並且可一次性建立一個虛擬源樹，以後每次的計算只要通過對該樹進行後序遍歷即可，大大提高了運算速度，因而有較高的接收效率與精度。本文對該模型進行了相應的模擬，並將其預測結果與實測結果以及基於cost231經驗性模型和基於強力射線跟蹤確定性模型的預測結果進行了比較，結果表明了該模型的優越性。According to the test conditions, the double polarity inputting mode is adopted in the circuit of voltage - frequency converting part ; storage batteries are used in the optical emission part of optical fibre isolating and transmitting device, that can guarantee isolation between the main circuit and the testing system ; the 89c51 singlechip is used in the singlechip testing - controlling unit, the peripheral circuits are extended, data are transmitted through the serial port in this part ; the p opular software delphi5. 0 is used in the pc part, the communication between singlechip and pc by serial port, plotting of current wave, regulation of data ; the optical - electrical isolating and triggering are used in the controlling part, this can guarantee the veracity and reliability of breakers triggered, this triggering mode is also used in the triggering of the main closing breaker, the tested breaker and the assistant breaker, the triggering signals are sent out by a singlechip
壓頻轉換部分電路中根據實際情況採用了雙極性輸入方式；光纖隔離傳輸裝置的光發射部分電源採用了蓄電池供電，確保了主迴路與測試迴路的完全隔離；單片機測控部分採用了89c51單片機，擴充了外圍電路，通過串口向pc機傳送數據； pc機與單片機之間的串口通訊、波形繪制、數據管理等都採用了軟體delphi5 . 0編寫。該測試系統中預留了輸出口，可以對合成迴路中的主合閘開關、被試開關、輔助開關進行觸發，信號由單片機發出，控制部分採用了光電耦合隔離觸發的方法。軟體設計主要集中在對電流信號的數據採集、數據處理、數據傳送、人機界面、波形繪制和數據管理，軟體部分又可分為單片機和pc機程序設計兩大部分。Firstly, this paper summarizes modern weaponry stealth technology at home and abroad, and lays special emphasis on analyzing stealth problem of cruise missile ’ s guidance head cover, aerocraft radar canopy and other privileged sites. secondly it makes a research on related theories of transparent metallic mesh that applied to missile ’ s guidance head cover and aerocraft radar canopy, and deduces relational expression between transparent metallic mesh structural parameters and radar wave - shielding efficiency, infrared transmitting. we use laser direct writing technique to fabricate a metallic mesh ( dimension : 70mm 70mm ; line width : 5 m ; period : 350 m ) on glass surface, then do experiment to test radar wave - shielding of metallic mesh via radar transmitting and receiving device
本文首先綜述了國內外現代武器系統隱身技術方法;重點對巡航導彈導引頭罩和飛機雷達艙罩等特殊部位的隱身問題進行了研究，研究了金屬網柵用於導彈頭罩和飛機雷達艙罩隱身的相關理論，推導了金屬網柵結構參數對雷達波屏蔽效率和透紅外關系式;用激光直寫工藝，在玻璃表面上製作了一塊面積為70mm 70mm ，線寬為5 m ，線周期為350 m的金屬網柵;在實驗室里用雷達發射和接收裝置測試了網柵對雷達波的屏蔽實驗;認為利用金屬網柵技術對雷達波具有一定的屏蔽作用，而且不影響精確制導的紅外線高效透過。Time - domain radiation models are brought forward for compromising emanation by applying standing wave dipole model and traveling wave monopole model to problem of electromagnetic information leakage. 2
首次將駐波偶極子模型和行波單極子模型引入信息電磁泄漏機理研究，提出了泄漏發射的時域輻射模型； 2( 4 ) the feasibility of applying of brightness temperature approach method and continuous measurement method in practical application are verified. the results of 8 - wavelength thermometer, which are based on the brightness temperature model, verify that continuous measurement method based on brightness temperature is a practical data processing method when the range of target ’ s emissivity is known. the
分別利用亮溫逼近法和基於亮溫模型的連續測量法對基於亮度溫度模型的八波長實測數據進行模擬，利用基於參考模型的連續測量法對固體火箭發動機羽焰溫度實測數據進行模擬，其結果驗證了連續測量法在工程實際中應用的可能性，並進一步驗證了當所給發射率范圍越接近實際物體發射率，計算結果越接近真溫。Its main function is to amplify and transmit the upconvertor ' s signal. it is applied to various kinds of ground equipment and satellite transponder. there was captured by foreign brand basically in the market of mobile communications in our country
眾所周知，功率放大器模塊是微波通信發射機的重要組成部分，它完成對上行鏈路信號的放大發射功能，廣泛的應用於各種地面設備和衛星轉發器中。Finally, introduces the electric circuit realization of the transmitter principle prototype in the multi - beam bathymetric system. the hardware development divides into three modules to carry on, respectively was the module of signal occurrence, the central controller and the the module of power enlargement, the article separately discussed each module principle of work and the realization plan
最後，介紹了多波束測深系統中發射機的原理樣機電路設計與實現，硬體研製分為三個模塊進行，分別是信號發生模塊、系統控制器和功放模塊，文章分別討論了各個模塊的工作原理和實現方案。A modified real signal model of channelized transmitter is presented that employs multiphase filters and discrete fourier transform to maximize computing efficiency, which can mean much in a radio communication system that requires real - time processing
特別提出了改進的實信號通道化發射機數學模型，通過利用多相濾波與離散傅立葉變換，減少信號處理運算量，這對于強調實時運行的無線通信系統有重要意義。Analysis of improving the quality of frequency spectrum of twt - transmitter
改善行波管發射機頻譜質量的分析The main contents and creative results of the paper are given as follows : ( 1 ) introduced the special requirement of output power for tv transmitter, on condition that the wireless coverage of tv signal is achieved at uhf, analyzed the important meaning of the research in high frequency linear power amplifiers of uhf transmitter
本文的主要研究內容和創造性成果如下： （ 1 ）介紹了在uhf波段實現電視信號無線覆蓋，對電視發射機輸出功率的特殊要求，分析了對uhf電視發射機高頻線性功率放大器進行研究的重要意義。分享友人