wide band 中文意思是什麼

wide band 解釋
規定較大幅度的浮動匯率制度
  • wide : adj （opp narrow）1 寬闊的。 2 廣闊的，廣大的，寬敞的。3 廣博的；范圍廣大的；廣泛的。4 遠離的；（...
  • band : n 1 帶，繩；帶形物；箍；箍條；嵌條；鑲邊；鋸條； 〈pl 〉 （法官等的）寬領帶。2 束縛，羈絆；義務；...
  1. The works of this paper are mainly about the study for ultra wide - band ( uwb ) signal radiating - designing for effective uwb antenna, and uwb signal scattering - investigating of composite scattering for targets upon ground. firstly, the radiating characters of uwb signal and development of uwb antenna are discussed an uwb planar horn antenna is designed this antenna is characterized with u - balun, simple construction and perfect performance

    本文的研究是「九五」國防預研「超寬帶（ uwb ）雷達體制及關鍵技術研究」項目工作的一部分，主要包括兩方面內容：超寬帶信號的輻射-高效超寬帶天線的研製；超寬帶信號的散射-地表目標的復合散射研究。
  2. The wide band network has applied the ip adn atm telecommunication technique, the most advanced in nowadays world. the on - line junction wide band from xinyu to nanchang reaches 22. 5g, which gets to customers via 8, 000 - core km optics cables and wide band switch - in networks. this has speeded uop the information process of this city, providing conditions for the information highway adn entering into " e " age

    5g ，通過遍布市內的8000芯公里光纖網、寬帶接入網及用戶網，能實現千兆到小區、百兆到大樓，十兆到用戶的高速網際網路接入，為真正實現通"信息高速公路" ，加快新余信息化進程，積極融入" e "時代創造了條件
  3. Cubic boron nitride ( cbn ) is a synthesized wide - band - gap iii - v compound semiconductor and has lots of excellent physical and chemical properties. it has been attracted a nice bit of attention for years because of its application in mechanics, calorifics, optics and electronics

    立方氮化硼（ cbn ）是一種人工合成的寬帶隙-族化合物半導體材料，它有許多優異的物理化學性質，在力學、熱學、光學、電子學等方面有著非常誘人的應用前景，多年來一直吸引著國內外眾多研究者的興趣。
  4. Basic environmental testing procedures. test methods. test fdc : random vibration wide band. reproductibility low

    基本環境試驗程序.試驗方法. fdc試驗.寬帶的隨機振動.可再現性低
  5. Shf communication technologies ag deals among other things in test equipments, variable - speed propulsions as well as in amplifiers, wide band, top hat rails and also in connectors

    Shf communication technologies ag是一家可靠的、知名的生產商和服務商，該公司提供很多令人震驚的產品，例如試驗器材，調整傳動裝置。
  6. Elliptical waveguides have found wide applications in a variety of microwave components : waveguide filters, radiators, resonators, and wide - band transmission lines, etc. periodic - loaded waveguides play very important roles in high - power microwave tubes, corrugated antennas and linear accelerators

    在各種微波器件如濾波器、輻射器、諧振器和寬帶傳輸線中橢圓波導有著廣泛的應用。周期加載波導在高功率微波管、波紋喇叭和線性加速器等中起著重要作用。
  7. It is becoming trends of modem radar technology, which are ultra - wide band, high resolution, low probability of interception, intelligent, according to the points of high tech local war happened last several decades

    針對高技術局部戰爭的特點，現代雷達技術正朝著超寬帶、高分辨、低截獲、多功能、智能化的方向發展。
  8. The factors limiting the frequency band of the wide - band amplifier are introduced. through analyzing the effects of the intrinsic parameters and parasitical on the frequency characteristics, a method of improving fr of mosfet by using short channel device and making mosfet work at the saturation region through raising vgs is put forward ; the effects of different kinds of circuit configurations on the frequency characteristics and the junction voltage on the voltage pattern circuit, current pattern circuit and frequency characteristics are analyzed. according to the linear theory of transconductance which is applied in the bit circuit, the current pattern amplifier circuit, current transfer circuit and output circuit which consist of mosfet and the wide - band amplifier composed of them are put forward

    介紹了限制寬帶放大器頻帶寬度的因素，通過分析mosfet的本徵參數、寄生參數對頻率特性的影響，提出了採用短溝器件、使mosfet工作在飽和區、抬高柵源電壓等提高mosfet特徵頻率的方法；分析了不同電路組態對放大器頻率特性的影響、節點電壓對電壓模電路、電流模電路頻率特性的不同影響，根據應用於雙極晶體管電路的跨導線性原理，提出了採用mosfet構成的電流模放大電路、電流傳輸電路、輸出電路以及由它們所組成的寬帶放大器，獲得了良好的頻率響應。
  9. Verification regulation of model 321 wide band phase angle voltmeter

    Pav - 321型寬帶相位電壓表試行檢定規程
  10. The radial motion will not only bring the range ambulation and windage to the one - dimension range - profile, but also bring the aberrance and blur produced on given condition that radar signal which is with large product of wide - time and wide - band

    對于大時寬帶寬積信號，目標高速運動不僅會造成目標一維距離像的距離走動和距離偏差，還會造成畸變和模糊。
  11. Duo to the intrinsic characteristics of the gaas material, serai - insulating ( si ) gaas photoconductive semiconductor switches ( pcss " s ) have more obvious advantages in the performance of both high power and ultra - fast switching than those pcss " s made of other materials and then can be widely used in ultrahigh speed electronics, field of high power microwave generation and pulse forming ( pulse sources of high power ultra - fast electromagnetism, ultra - wide - band microwave generator )

    半絕緣gaas光電導開關（ photoconductivesemiconductorswitches簡稱pcss ' s ）具有兼備寬頻帶和高功率容量特性，使其在超高速電子學和大功率脈沖產生與整形技術領域（大功率亞納秒脈沖源、超寬帶射頻發生器等）具有廣泛應用前景。
  12. Wide - band channel wbc

    寬帶通道
  13. The main research works of this dissertation are aimed to design of radar waveform and the application of wavelets in ultra - wide radar, including : the design of a new kind of hybrid radar and the research of time side - lobe suppression for pulse compression, the design of receiver r adio front end in data acquisition of ultra - wide band radar, the time delay estimation based on wavelets ( packet ) analysis

    本文主要進行雷達波形設計研究以及研究小波理論在超寬帶雷達中的應用，集中體現在以下幾個方面：一類新的組合雷達波形設計及壓縮脈沖時間旁瓣抑制技術研究、超寬帶雷達多通道數據採集方法中前端射頻接收部分的設計及研製、基於小波（包）方法的時延估計方法。
  14. The delay chip, whose delay precision can be 10ps, wide band sample - hold amplifier ( sha ), and high speed and precise analog / digital conversion ( adc ) are used in the system

    能夠對5mhz以下的信號進行隨機采樣、波形顯示、頻譜分析，還能夠對採集的波形數據進行存儲、共享。
  15. Though wide - band has been used widely, it ' s not wide enough to watch high - quality real - time video. futhermore, wiless communicaton has become a hot technology, it has limited band and unstable communication channel which result in high percentage of errorness in this situation, if people want to watch realtime video, it has high demand that video producer compress the video as small as possible when quality is good enough and receiver have ability of error resilience

    另外，無線通信已經成為當前it領域的一個大熱點，對無線通信來說，帶寬就更加有限，並且傳輸線路不穩定，錯誤率高，在這種情況下，如果想通過無線網路在線觀看視頻，必然需要視頻發送端在保證質量的情況下對視頻進行盡可能的壓縮，同時提供強大的糾錯和抗錯能力。
  16. Aln is an important compound semiconductor material with wide band - gap, which has wurtzite structure too. because of their many excellent physical properties, aln thin films were applied in blue - uv emitting materials, epitaxy buffer layer, soi material and saw device with ghz band

    Aln具有許多優異的物理性能，在藍光、紫外發光材料及熱釋電材料、外延過渡層、 soi材料的絕緣埋層和ghz級聲表面波器件等方面有著重要的應用。
  17. In the end, the impedance matrix of any three - dimensional conducting object can be portioned into sub - matrices by the projection iterative method ( pim ), the surface current and rcs can be calculated with convergent iterations, the wide - band electromagnetic scattering characteristics of three - dimensional conducting objects are also analyzed with the asymptotic waveform evaluation technique

    最後應用投影迭代方法（ pim ）將三維導體目標的阻抗矩陣剖分成小矩陣，通過迭代計算出表面電流和雷達散射截面，並與漸近波形估計技術結合分析了三維導體目標的寬帶電磁散射特性。
  18. From the result we get the following conclusion : for narrow - band signal, the effect of the method based on fft is best. for wide - band signal, when snr is up to certain degree ( higher than - 7db or so ), the curves of square error of modified methods are more obvious and closer to crb. for an echo composed of more than one frequency or direction, space - frequency distribution could show more direct information of frequency and direction, which is more advantaged to make precise judge and estimation for doa of echo

    從估計結果發現，對于窄帶回波信號，基於fft的方法估計性能大大優于其他方法；對于寬帶回波信號，在信噪比達到一定程度（高於約- 7db ）時，補償后的幾種估計法的性能改善均比較明顯，誤差曲線越來越接近crb曲線；對于回波中存在多頻率多方位的情況，空間?頻率分布圖能提供較為直觀的頻率及方位信息，因此應用空間?頻率估計法來進行方位估計，更有利於進一步對回波的具體方位進行準確判斷和估計。
  19. At first some modification is made in conventional beam forming of frequency domain, namely to estimate doa by arrays outputs on compensated spacial frequency points of echoes. then the cwt is utilized to signal processing in space - frequency domain for estimation of doa, and the corresponding modification is also made. in the dissertation, the computer simulations of doa estimation for both narrow - band and wide - band echoes are given, so do the necessary comparison among several methods and crb

    首先在傳統的頻域波束形成演算法的基礎上，提出對寬帶信號的頻率補償，也即對寬帶回波信號的各空間頻率根據時間頻率的差異進行相應補償，然後對各陣元輸出求和來得到方位估計；其次將連續小波變換引入到空間?頻率處理中，從而完成對目標方位的估計，並進行了相應地補償。
  20. Characterized by wide band gap, high breakage electric field, high thermal conductivity, high saturated electron mobility, cubic silicon carbide ( 3c - sic ), considered as one of the most promising wide band gap semiconductors, is widely utilized in high temperature, high frequency and large power semiconductor devices

    3c - sic被譽為最有潛力的寬禁帶半導體材料，具有帶隙寬、臨界擊穿電場高、熱導率高、飽和電子漂移速度大等優點，是高溫、高頻、高功率半導體器件的首選材料。
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