velocity band 中文意思是什麼

velocity band 解釋
速度范圍
  • velocity : n. 1. 迅速；快速。2. 速度，速率。3. 周轉率。
  • 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. Negative group velocity in the band gap range

    禁帶區域內負的群速度
  2. Silicon carbide is becoming the most promising semiconductor material for high temperature, high frequency and high power devices because of its superior properties such as wide band gap, high breakdown field, high electronics saturation drift velocity, and high thermal conductivity

    Sic材料由於具有寬禁帶、高臨界擊穿電場、高飽和電子漂移速度、較大的熱導率等優良特性，因此成為製作高溫、高頻、大功率器件的理想半導體材料。
  3. The clues and techniques to improve the resolution of data processing are 1 ) removing the affection of near surface factors on data acquisition, including static correction and noise eliminating technique etc, 2 ) broadening the frequency band of pre - stack seismic data, including amplitude compensation and pre - stack deconvolution etc, 3 ) improving s / n ratio of high frequency and weak reflection signals through multiple coverage with high precision velocity analysis, residual static correction and high - order nmo, raising " dead line of high frequency reflection ", and 4 ) identifying post stack effective reflection frequency band, enhancing dominant frequency and so on

    主要包括：消除近地表因素對資料採集的影響，包括靜校正和噪音壓制技術等；疊前拓寬地震資料領帶，包括振幅補償和疊前反褶積技術等；藉助高精度速度分析、剩餘靜校正和高次項nmo技術，通過多次覆蓋疊加，消除資料中隨機噪聲干擾、提高資料信噪比，尤其是高頻端反射信息的信噪比，改善高頻反射和弱反射信號信噪比，提高「高頻反射死亡線」 ；疊後有限反射頗帶識別、抬高優勢頻率等。
  4. By using optical cable communication methods, which have advantages of great information transmission capacity, rapid velocity, wide frequency band, strong anti - jamming capability, low circuitry loss and easy construction, modern sky - wave over - the - horizontal radar can achieve information transmission and system control of full coherent radar, which has excellent abilities of security, stabilization, anti - jamming and anti - destruction

    通過採用光纖傳輸技術，利用其信息傳輸容量大，速度快，頻帶寬，抗干擾能力強，線路損耗低，易於施工等特點，實現全相參雷達的信息傳輸和系統控制，具有優良的保密性，穩定性、抗干擾性和抗摧毀能力。
  5. First, this paper research and analyze the feature of signal of pulse doppler radar, and the mathematic model of radar is constructed. the several interference methods that narrow - band suppressing interference, range deception interference and velocity deception interference are discussed. and interference ability is evaluated and simulated

    研究和分析脈沖多普勒雷達信號特徵，建立了該種雷達的數學模型，並討論對脈沖多普勒雷達的窄帶噪聲壓制式干擾、距離欺騙干擾、速度欺騙干擾等幾種干擾樣式，並進行干擾性能評估和模擬研究。
  6. It is well known, the multi - media can deal with tremendous data, in former web condition, confined to the velocity of the connected modem equipment, real - time transmission of the connected media is usually impossible, though it is possible to make the connection come into reality, the loss of the data is very serious, the transmission of the picture may pause or stop obviously and can not reach the ideal effect without practical operation, however, in recent years with the development of the new development in connected web technology, such as xdsl and the mature popularization of the broad band technology like optical fiber

    眾所周知，多媒體的數據吞吐量往往十分巨大，在以前的網路狀態下，受制於modem等網路接入設備的速率條件，連續媒體的實時傳輸往往是不可能做到的，即使能夠勉強連接成功，其數據包的丟失現象也是十分嚴重的，圖像的傳輸有明顯的停頓甚至停止的現象，達不到理想的效果，所以並不具有實際的可行性。但隨著近年來網路接入新技術的發展，如xdsl 、光纖等寬帶技術的成熟和廣泛應用。
  7. It discusses motion - detector response to narrow - band image motion and to broadband images. studies show that the motion - detector can provide velocity estimates in organism ' s natural visual environment, and physiological prefilters can improve determination of velocity of moving image

    研究表明：運動檢測器可以精確檢測多頻譜自然圖像速度，在運動檢測器前增加生理學預濾波環節可以改善圖像運動速度的估計。
  8. The millimeter has the largest frequency band and the highest velocity of communication, but it has the highest cost and technical defaults : multi - path effect, reflect and scatter caused by cloud, smoke, water - dropping, the buildings, the grounds and its shape, the interference caus ed by the thunder, the complexity of device, difficult maintenance, and so on. now the band of the leakage coaxial line is up to 3ghz, leakage coaxial line has some advantages : good adaptability to cloud, smoke, water - dropping, the buildings, the grounds and its shapes, good steady field, it has some technical defaults : lower resolution for location and measuring velocity, the more complex of its sending - receiving relay devices, weak anti - interference, the strict demand for the hole size in the line, the cleaner work environment and the higher cost

    毫米波具有最大的帶寬和最高的通信速率，但也有最高的成本要求和較難克服的技術問題，即傳播的多徑效應，降水、雲霧、地形、地貌、建築物等的反射散射，打雷時的嚴重干擾，設備復雜，維護困難等等；泄漏同軸電纜的帶寬目前已做到3ghz ，具有對地形地貌建築物的適應性強，場強穩定，但它的定位測速精度低，它的收發中繼設備較復雜，抗干擾能力低，電纜上的開槽有著嚴格的尺寸要求，工作環境要求清潔，成本較高；傳統無線感應技術具有結構簡單，成本低廉，維護方便，定位精度較高的優點，但是，它沒有抗干擾能力。
  9. They can also be built with high - gam preamplifiers to close high - band - width velocity loops

    他們也可由高通量前置放大器來實現高頻度速率循環。
  10. The imaging algorithm provides a new choice for wide band imaging. according to the sar radar performance such as resolution, the choice and requirement for radar system parameters are discussed in the chapter 4. specially the precision requirement of velocity, acceleration, and the roll, pitch angle and altitude of radar carrier provided by ins is deduced in detail

    本文第四章從合成孔徑雷達所需要的解析度等設計指標出發，具體分析了合成孔徑雷達的主要設計參數的選擇與要求，特別對慣導系統提供的速度、加速度、姿態角和載機高度等測量精度要求進行了詳盡的分析。
  11. This system realizes the underwater distance mobile security communication. the only shortage is the low velocity, which is result from the speciality of underwater channel and that spread spectrum need big frequency band

    採用這一技術的水聲通信實驗系統成功的進行了湖上試驗，這種技術的不足是通信速率較低，這是由於水聲通道的特殊性以及擴頻技術要佔用大量帶寬所致。
  12. When in the weak ground motion condition, the velocity - type digital broad - band records are more suitable for long peri

    Ss左右銜接較好，從一個側面說明了這兩種數據在1
  13. We find that the noise level of the record is very low. even in weak ground motion condition the digital broad - band record has high signal - to - noise ratio when the period is as long as 20 sec. the signal - to - noise ratio of the velocity - type records is lower than that of the acceleration - type records

    木義發現，數宇寬頻帶記錄的啪盧水平很低，在川朔k達205時，即仗在弱地震動的惰況下，還具有較高的信啪比，並且濁度型記錄的信噪比禾廠加讓度型門錄的信噪比。
  14. ( 5 ) when hydrocarbon compound is coved by thick shale, hundreds meters low velocity gas incursion diffuse band is seen clearly above sandstone in huanhua sag. sometimes bulk and range of incursion diffuse band is large than hydrocarbon compound accumulate body. its seismic response must be recorded

    （ 5 ）研究發現，當烴類聚集體被厚層泥巖覆蓋，在其上方出現百米以上的低速氣浸擴散暈的現象，它對地震波場的附加影響必會被記錄下來，使對2500 4500米埋深含油氣砂巖的地震檢測成為可能。
  15. Due to its intrinsic merits, such as wide band gap, high electron saturated drift velocity, high melting point, good coefficient of thermal conductivity, anti - radiation and good chemical stability, gallium nitride as a direct band gap semiconductor has become the promising material for the application of short - wave light - emitting devices and high temperature, high frequency and high power electronic devices

    Gan是直接帶隙半導體材料，以其禁帶寬度大、電子飽和漂移速度大、熔點高、熱導率高、抗輻射能力強和化學穩定性好等優點成為製造短波長光發射器件及高溫、高頻、大功率電子器件的理想材料。
  16. The reliability of the observation data in long period range is particularly inspected. this is done " by verifying the instrument response characteristic, examining the signal - to - noise ratio, comparing the recovered ground motions and response spectra from the velocity type and acceleration type digital broad - band records

    對于速度型和加速度型的數字寬頻帶記錄，從儀器特性、恢復的地面運動對比、信噪比研究、反應譜對比等方面研究這類記錄在長周期段的可靠性。
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