短波傳播 的英文怎麼說

中文拼音 [duǎnzhuàn]
短波傳播 英文
short wave propagation
  • : Ⅰ形容詞(空間、時間兩端之間的距離小) short; brief Ⅱ動詞(缺少; 欠) lack; owe Ⅲ名詞1 (缺點) we...
  • : 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...
  • : 傳名詞1 (解釋經文的著作) commentaries on classics 2 (傳記) biography 3 (敘述歷史故事的作品)...
  • : 播名詞(姓氏) a surname
  • 短波 : [電學] sw (short wave); high frequency wave
  • 傳播 : 1 (廣泛散布) disseminate; propagate; spread; (over); diffuse; transmit; run 2 [物理學] propag...
  1. The ionosphere is a complex medium, which is aeolotropy, asymmetry, dispersive and changes randomly with time. in order to improve the communication quality of the shortwave that depends on the ionosphere, we should have aknowledge of the current condition of the ionosphere in real time. the backscatter sounding of high frequency can diagnose the real - time channel characters for shortwave communication or hf radar, which is great assistant to shortwave communication and hf radar

    電離層是隨機時變,各向異性,非均勻、色散的復雜介質。為了保證依賴于電離層進行的通信質量,必須了解電離層的實時狀態信息。高頻返回散射探測可以實時監測與通信或高頻天雷達相關的天通道的狀態,對通信和天雷達工作起了重要的輔助作用。
  2. These high-frequency shout waves are only able to travel in straight paths from the transmitter.

    這些高頻從發射機發出后只能從直線
  3. To utilize property of saws propagating, it can be made including delay lines, passband filters, oscillators and pitch filters. surface transverse wave ( stw ) was used the configurature of reflective metal - strip grating between the two interdigital transducers, and made the shear horizotal ( sh ) wave on the surface of the piezoelectric substrate, but not to deep in

    聲表面橫( surfacetransversewave ,簡稱stw )是採用在兩個金屬叉指換能器之間加入路柵的隔離板結構使剪切水平( shearhorizontalwave ,簡稱sh)被嵌制在壓電基片表面上,而不是沿壓電基片內的聲表面橫形式。
  4. Combined with the newly developed short - wave monitor and meterage system, the paper gives a thorough investigation on short - wave diffuse theory, radio direction detecting technology, dsp theory, software radio theory, ect

    本文結合自行研製的新型監測設備,對短波傳播理論、無線電測向技術、數字信號處理理論和軟體無線電理論等進行了深入研究,並將其應用於設備中。
  5. We have calculated and plotted the curves of the refractive index, group velocity index, lowest - order and second - order dispersion indexes as a function of wavelength. the lowest - order and higher - order dispersion - induced broadening and deforming of light pulses is analyzed for various pulse shapes, such as gaussian, super - gaussian and hyperbolic secant pulses

    給出了折射率、群速指數、低階和二階色散系數隨長變化的關系曲線,研究了高斯脈沖、超高斯脈沖和雙曲正割脈沖等超脈沖在clbo晶體中時,由於低階色散和高階色散引起的脈沖展寬和形變。
  6. On the design of the system, the thickness measure system of mems chip is built based on lbu and pump - probe technology. on the analysis of data, the reflectivity curve is analyzed using the law of reflectivity change induced by ultrasound, and the thickness is calculated using the system designed by the article, to aluminum film the size of about 20nm can be measured, when the film be measured is single layer, the relative error of the system is less than 2 %, when the film be measured is double layer, the relative error of the system is less than 10 %

    在基礎理論方面研究了激光(特別是超脈沖激光)超聲的激勵機理,探討了激光調制技術以提高系統信噪比,闡述了泵束探針束技術及相關實驗設置;在系統設計上,以激光超聲為基本原理,以泵束探針束技術為系統設計方案完成了mems基片厚度測量系統的設計;在數據分析方法上,利用聲致光反射率變化的一般規律對測得的光反射率曲線進行分析,確定超聲回在薄膜兩界面間來回的時間,以計算薄膜的厚度。
  7. A pulse hard source has been adjusted to allow the reflection wave pass by the source without retroreflection. and the calculation area is changeable at the different time step, so only those area with wave propagation have been calculated. as the results, the total calculation time can be reduced

    還有計算區域隨時間改變的方法,利用fdtd計算空間點的鄰近性,在不同的時間步上計算不同大小的區域,使得只有到的區域被計算,這樣可以縮計算時間。
  8. In the wavefield - spread area, we uses the phase - shift operator as constraint in frequency - wavenumber field, while beyond the wavefield - spread data, we uses zero point at the ends of phase - shift operator as constraint to take discrete smooth interpolation so that the resulted operator satisfies two - order smooth and the length of this operator can be selected shorter in frequency - space field

    通過離散光滑插值法,在頻率數域中,以區內的相移運算元為約束,在區外的運算元兩端處以零點為約束,進行離散光滑插值,使得所得運算元具有二階光滑可導性,則其對應的頻率空間域中的運算元就可以取得很
  9. Solving the static correction problems under complex near - surface conditions is a systematic engineering. first, careful field weathering investigation must be done, then we have to take full advantages of refraction first - break information and field weathering investigation information to compute field static correction and large residual static corrections with various refraction first - break statics methods, finally, reflection statics methods are used iteratively to solve the residual statics problems. to solve serious static correction problems in complex near - surface areas of western china, different refraction first - break statics methods are studied in this thesis. the main study contents are as follows : 1 ) the propagation features of refraction for horizontal layered and dip media are studied firstly, it lays a good theoretical foundation for later statics method studies

    本文針對目前西部油氣勘探中迫切需要解決的復雜地表區靜校正技術難題,對初至折射解決二維和三維長、長靜校正問題的正反演方法進行了深入的研究和探討,研究內容主要包括( 1 )水平層狀和傾斜界面折射規律,為后續的折射靜校正方法研究奠定理論基礎; ( 2 )二維復雜層狀介質地震折射正演方法,該方法可適用於折射面起伏不大、低速層和折射層速度變化不大的情況。
  10. The muf and the possible maximum skywave field strength are calculated and are compared with the corresponding groundwave. and the conclusion is that the main propagation mode 200 kilometers on the sea is groundwave and the disturbance of skywave could be omitted

    得出天的最高可用頻率、可能的最強天場強,並與相應的地場強進行了比較,闡明了海上200公里距離上的通信中電主要是以地的形式的,天對地通信的多徑干擾問題可以忽略的結論。
  11. Passing through the construction of a special coupled neural network, which can mimic the autowaves in the pulse - coupled neural networks ( pcnns ), we present a new approach ( auto waves approach ) for solving tsp. the autowaves spread in the network, and the path which the first arrived at the end point from the start point has passed is the optimal answer to the shortest path problem

    通過構造耦合神經網路,使得由神經元點火所產生的自動在其中,最先到達目的地的前所走過的路徑即為最路問題的最優解,從而有效地獲得了tsp問題的最優解。
  12. Rtce is based on forecasting the inherent vulnerabilities to propagation of hf time - varying channel, including multipath delay, doppler spread, selective fading, interference, so this paper also introduces characteristics of hf channel in the beginning. familiar rtce systems all adopt envelope method that bello brought forward

    實時選頻技術是基於對電離層時變通道固有的不利於電的各種因素,包括通道的多徑展寬、多普勒展寬、選擇性衰落、噪聲干擾等的預測的基礎上實現的,所以在開篇對通道的特點進行了詳細的介紹。
  13. It ' s briefly demonstrated that the overall plan of the close range shortwave marine communication system, which including format of radio propagation, operation frequency, communication architecture, main parameters and the sampling part of receiver

    以水下作戰平臺對母艦的通信為背景,對海上近距通信系統的總體方案進行初步論證。其中包括電形式的論證、工作頻段的選擇、通信體制的選擇、接收機總體指標以及接收機采樣部分技術論證。
  14. The bbc is taking the internet very seriously, for it ' s a cheap way of getting a reasonable quality signal to places in the world that even our short - wave transmitters can ' t adequately reach

    英國廣公司非常認真地對待網際網路廣一事,因為網際網路廣可以用較少的投資將音質不劣的信號達到都無法達的地區。
  15. In studying the law of the wireless electric wave propagation, one can combine rt with fdtd, and take the advantages of each other. using the rt to compute the field except for the area to be computed by fdtd, and making the field as the fdtd ' s excition source, fdtd can compute the field in the small part, and can get many points field at one time, so it can provide the information for the designing installing and tuning wireless devices

    對于室內無線電的研究,可以結合rt與fdtd ,使兩者取長補,發揮各自的優勢,利用rt可以計算出(除將採用fdtd計算的區域以外)場,將該場作為fdtd的激勵,利用fdtd就可以計算出細微處的場,並可以一次精確計算出多個點的場,從而為無線設備的設計、安裝與調試提供可靠的信息。
  16. To illustrate the superiority of this type of transition, the author adapted the local normal mode ( lnm ) based on couple - mode theory to explain the coupling between two lowest order modes along the transition. for the two important parameters, propagation constants difference between the two modes apy and mode coupling coefficient cy, which denoting power coupling between lnms, the approximation expressions using structure parameters were worked out. then the author compared three typical different transitions according to the demanding of power coupling, at last concluded that the parabolic - type transition can transport the light in shortest length with lowest loss

    對于表徵局部標準模之間功率耦合的兩個重要的參數_ ( ij ) (模式常數差)和c _ ( ij ) (模式耦合系數) ,推導了用器件結構參數表達的近似公式,然後根據功率耦合的需求,在常見的三種不同輪廓的過渡區之間進行了比較,得出了拋物形輪廓過渡區能夠使光束在最尺寸內以最低損耗通過導的結論。
  17. Jackson is nervously monitoring reports in the zimbabwean press that the government is about to begin an all - day propaganda station to be called radio 24 - 7, on short - wave frequencies inside and outside zimbabwe

    傑克森很緊張的在關切辛巴威國內媒體的報導,指出政府將要設立一個全天的政令宣電臺,叫做24 - 7電臺,用頻率在辛巴威境內和境外出。
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