效率頻帶 的英文怎麼說

中文拼音 [xiàobīndài]
效率頻帶 英文
efficiency band
  • : Ⅰ名詞(效果; 功用) effect; efficiency; result Ⅱ動詞1 (仿效) imitate; follow the example of 2 ...
  • : 率名詞(比值) rate; ratio; proportion
  • : Ⅰ形容詞(次數多) frequent Ⅱ副詞(屢次) frequently; repeatedly Ⅲ名詞1 [物理學] (物體每秒鐘振動...
  • 效率 : productiveness; efficiency; productivity; workpiece ratio
  1. Based on the real situation of submarine and antisubmarine warfare ( asw ), according to the classical design theory of transducer or transducer array, a sonar will be researched and made, which has the feature of more wider bandwidth, more lower operating frequency, more lager radiation acoustic power, more farther operating distance, more higher researching efficiency and more higher directive accuracy

    本文根據現代潛戰和反潛戰( asw )的實際情況,按照經典的換能器和基陣的設計理論,研製聲吶,旨在擴展其寬度、降低其工作、增大其發射功、擴大其作用距離以及提高其搜索和定向準確度。
  2. In this study, the stem segments of new shoot with axillary buds of well - growth tetraploid black locust trees were used as explants. the effects of different basic mediums, different hormone kinds and their concentrations ratios, different sucrose concentrations on calli induction, buds differentiation and rooting in the process of establishment of high frequency regeneration system of tetraploid black locust were studied. on the base of high frequency regeneration system, the effects of various factors on transformation efficiency of badh mediated by agrobacterium tumefaciens were discussed in the light of gus histochemical assays

    本實驗首先以生長良好的四倍體刺槐優株上當年生新梢的腋芽莖段為外植體,研究了在四倍體刺槐高再生體系的建立過程中不同基本培養基、不同激素濃度及其配比、不同蔗糖濃度對愈傷組織的誘導、芽的分化及生根的影響;然後在得到高再生體系的基礎上,通過農桿菌介導法轉化甜菜堿醛脫氫酶( badh )基因,以gus染色組織分析為依據探討了影響轉化的各種因素,建立了高、可重復的基因轉化體系,為四倍體刺槐目的基因的導入打下了基礎。
  3. Due to existing signal processing technology ’ s shortage such aslow measurement, narrow measurement range precision and other poor performance, we introduced a high - precise signal processing technology : firstly, to get power spectrum with hanning windowed welch modified periodogram, search its peak value frequency ; secondly, to apply zooming analysis via goertzel algorithm ; at last, to get a highly precise doppler frequency with energy centrobaric rectifying algorithm 。 the simulating result indicated that this technology introduced could get accurate doppler frequency 。 depending on above discussed technology, we designed a signal processing scheme, and developed a signal processing system. the running result showed high performance, verified the feasibility and reliability of the highly precise signal processing technology introduced. in a word, the technology improved ldv ’ s performance such as measurement precision, measurement range, dynamic response time 。 and it will have a wide application foreground

    針對存在的缺點,本文提出了一種應用於激光多普勒測速的高精度信號處理技術,即首先利用加hanning窗的welch修正周期圖演算法得到信號功譜,搜索其譜峰值,接著利用goertzel譜細化演算法對搜索的譜峰進行細化分析,再引入能量重心譜校正演算法對細化后的譜峰進行校正分析,從而將離散譜分析演算法、譜細化演算法和譜校正演算法三者有機結合起來,充分發揮各自的優點:通過加hanning窗的welch修正周期圖演算法快速得到功譜及峰值,通過goertzel演算法獲得分析的高解析度譜,然後通過能量重心校正演算法對細化后的譜進行高精度校正,這樣不僅保證了演算法的高性,而且大大提高了分析的精度。
  4. In all kinds of complicated network, oriented linking and unlinking, communication frequency resource is strained, and bandwith to transmitting audio frequency signal is too restricted, complicated and fluky, while audio frequency data exponential have been increased in the last several years. under the circumstances, based on the research of predecessor, this paper studies wavelet analysis ' s maths gist and practices significance on signal process, and puts forward a optimized wavelet package condensation arithmetic to process audio frequency data, which gives attention to coding efficiency, multirate and compression delay. simulation experiment on the arithmetic has been done by matlab

    針對無連接和面向連接的各種復雜網路環境下,通信資源緊張,音傳輸寬有限且復雜多變,而各種音數據又日益增多的局面,本文研究小波分析在信號處理方面的數學依據和在數據壓縮方面的實際意義,在前人不斷工作的基礎上,提出了一種優化小波包變換編碼方案用於音數據的壓縮演算法,兼考慮了編碼、多碼和壓縮時延多個方面,並在matlab環境下做了模擬實驗,對各種音信號及多種小波函數做了模擬結果比較,實驗結果證明該演算法可以在一定計算復雜度下可以很好地改進壓縮果,達到多碼下實現實時編解碼的過程,在高速dsp晶元等硬體設備支持下,可以有應用於實際復雜多變信源編碼。
  5. A parametric psychoacoustic model based on critical band rate, level - dependent spreading function, non - linear superposition and forward masking was proposed

    摘要提出了基於臨界、依賴于強度的擴展函數、非線性迭加和前向掩蔽應的參數心理聲學模型。
  6. Thus, objective of this project is to improve the functionality and efficiency, and mitigate the drawbacks of a variable speed generation system or asg ( adjustable speed generator ) in conjunction with a dfig ( double fed induction generator ), which is frequently named as variable - speed / constant frequency ( vscf ) generation system

    本文的研究目的是改進雙饋電機變速發電系統或變速驅動系統的的功能和,減輕系統缺陷所來的危害。雙饋電機變速發電系統通常又稱為變速恆發電系統( vscf - variablespeedconstantfrequency ) 。
  7. Finally, using the low loss 3 - db three port network as power dividing and combing network and using hmmc 5040s fabricated by agilent co. as single - way amplifiers, with the help of e - plane waveguide to microstrip transition, we have designed a two - way power combing circuit with waveguide as interface ports. in 33ghz ~ 35ghz, the measured saturated output power is about 170mw, and the combing efficiency estimated is greater 70 %

    最後,採用我們設計的3 - db三埠網路作為功分配、合成網路,以常用的微e面探針作為微-波導過渡結構,採用agilent公司hmmc5040作為放大單元,製作出了波導介面的兩路合成電路,在為33 35ghz實測飽和功達170mw ,合成高於70 。
  8. According to the guidline, two nd : yag lasers have been designed and set up, one is end - pumped by lower output power ld using a selfoc micro lens, and the other is end - pumped by high output power ld using a pair of lenses are designed, and the characteristics such as output power and power stabilization of both solid - state lasers are investigated. thirdly, when an empty liquid crystal cell is inserted in the cavity of the nd : yag laser pumped by high power ld, the laser can operates in single axial mode. finally, according to the relationship between the laser output power and the longnitudinal a ld - end - pumped nd : yag laser sensor for displacement measurement has been investigated theoretically and demonstrated experimently, the results indicate that when the mean radius of pumping inside the laser cavity is far less than that of the oscilating laser mode, the exponential of the output power is a gauss function of the longitudinal positon of focused spot of ld pumping beam, both the measurement range and the sensitivity are dependent on the incident pumping power, as the incident pumping power is increased, the measurement range is enlarged and the sensitivity is improve d

    本文首先介紹了ld泵浦nd : yag激光器的發展狀況、主要特性及其應用,從四能級速方程出發,推導了ld泵浦nd : yag激光器的閾值、輸出功和斜的表達式,並簡述了激光器的工作原理、結構型式和倍方法;其次,以空間相關的速方程為基礎,提出了ld端面泵浦nd : yag激光器的設計方法,給出了一定泵浦耦合方式下,振蕩光模尺寸、最佳輸出耦合、泵浦光模尺寸、泵浦光焦斑位置等參數的選取依據,以此為依據,設計了自聚焦透鏡耦合小功ld泵浦nd : yag激光器和透鏡組耦合高功ld泵浦nd : yag激光器,對激光器的輸出功和功穩定性等特性進行了實驗研究;再次,在尾纖輸出的高功ld泵浦nd : yag激光腔內插入一隻空液晶盒,觀察到了激光器以單縱模運轉;最後,根據泵浦光焦斑端面位置對激光輸出功的影響規律,提出了ld端面泵浦nd : yag激光位移傳感新方法,並進行了理論和實驗研究,研究結果表明:當激光晶體內泵浦光平均光斑半徑遠小於振西安理工大學碩士學位論文蕩光束腰半徑時,激光輸出功的自然指數與泵浦光焦斑的縱向位置成高斯變化規律,測量范圍和靈敏度依賴于泵浦功,隨著泵浦功的增加,測量范圍擴大,靈敏度提高,當端面泵浦功為7 . 24w (最大輸出功為1 . 926w )時,激光位移傳感器的測量范圍和靈敏度分別是13 . 045mm和0 . 148mw / pm 。
  9. 1driving form : speed - regulate of frequency converter + universal shaft coupling + synchronous belt with high accuracy in synchronism, high in mechanism and guarantee in lifetime of the components

    傳動型式:變器調速+萬向聯軸器+同步,同步精度高,機械高,構件使用壽命保證。
  10. This dissertation focuses on the application of data fusion in two - phase flow regime identification. following is the main contribution of the dissertation. 1 ) based on quartile and first order differential, a new outlier detection algorithm is presented, experiments show that the method combining with low pass filter can remove gross error and unwanted frequency components

    本文的主要工作與創新點在於: 1 )將分位數方法與一階差分法相結合,提出了一種基於一階差分的粗差剔除方法,該方法與低通濾波器的結合可以有去除兩相流壓力波動信號中的粗大誤差以及信號以外的成分。
  11. But the bandwidth of the raw radar video is too wide to transmit directly in the common communication channel

    但是雷達原始視信號譜很寬,要求傳輸設備有很寬的通,而且低、投資大。
  12. Switching power amplifier is popularly used because of its virtues of low power losses, high efficiency and high frequency bandwidth

    開關型功放大器因其損耗小、高、通寬等優點,廣泛取代了早期低的線性功放,成為目前功放大器研究的重點。
  13. In packet based wireless video communications, when best band distribution, not only source distortion should be considered, but also channel distortion caused by channel errors. the existing macroblock - layer rate control schemes calculates quantization parameters of all macroblocks ( mb ) in a frame in a raster scan order, and then encodes the mbs in the same order. actually, the quantization distortion is heavily dependent upon the coding order of mbs

    在基於包的無線視傳輸中,最佳寬分配時,不僅要考慮信源編碼失真,也要考慮由於通道差錯引起的通道失真;已有的宏塊層碼控制演算法以矩陣掃描的順序計算一幀中所有宏塊的量化參數,事實上量化失真與宏塊的編碼順序有很大關系,改變宏塊的編碼順序,使復雜的宏塊分配到更多的比特數,顯然能大大提高編碼
  14. Method for measuring effective output power bandwidth for institutional audio - visual equipment used primarily for speech

    用於演講的教學視聽設備的有輸出功寬度的測量方法
  15. The spot responder system which is the necessary part of ctcs is analyzed in the dissertation and three key technologies of the channel in the responder system are researched. firstly, a new kind of rectangular plate magnetic inductive loop antenna is designed to transmit the power frequency. researching the near field inter - inductive characters, the relationship among the inductive efficiency, the perimeter and the conductor width of the antenna is found out

    本文在對ctcs中的點式應答器系統原理及組成進行分析和消化的基礎上,對系統中通道的幾個關鍵技術進行了詳盡的研究,主要分為三個方面: 1 ,提出並研製了新型的片式環形磁感應天線,並對傳輸能量載波的天線的近場互感特性進行了分析,得到互感隨天線的周長大小以及導寬度的變化規律,並通過計算機模擬和試驗對天線的近場波瓣圖進行了研究;通過分析寬匹配技術中的實法理論,設計了信號載波天線的寬匹配網路。
  16. Analyze, design and simulate the digital down - convert frequency. first, the analogue if signal is converted to digital if signal in one a / d convertor which used passband sampling theory. the digital if signal is then passed to a pair of digital mixers operating in phase quadrature for mixing the if signal to baseband signal

    首先利用通采樣定理對中模擬信號進行a / d變換后將其混到基,然後用平方根升餘弦滾降濾波器同時完成低通濾波和匹配濾波雙重作用,以提高解調器的
  17. The influences of electron beam and rf system parameters, magnetic field on output power, efficiency, bandwidth and gain are discussed

    研究了電子注參量、高輸入功、外部磁場等對互作用、輸出功的影響。
  18. We discussed the main characteristic parameters of seismic kinesiology and dynamics of mine engineering fracture zone, including relative amplitude, phase time of wave crest, similarity factor, principal frequency band energy, 3 - d space time gradient and coherent coefficient et al., and puts forward the processing method of 3 - d seismic characteristic parameters about denoise - smoothing, generalization, correlation analysis, characteristic transformation ; and presents the method of pattern recognition of mine engineering fracture zone

    摘要本文從時間域、域、三維空間域介紹了礦山工程裂隙破碎主要的地震運動學、動力學屬性參數,包括相對振幅、波峰相位時間、相似系數、主能量、二維空間時間梯度和相干系數等,提出了礦山工程裂隙破碎三維地震屬性的去噪平滑、歸一化、相關分析、特徵變換的處理方法以及裂隙破碎的模式識別原理與方法,並用實例說明了該方法的應用果。
  19. Two cold - test parameters determine the working voltage, frequency band, efficiency and gain of twt. they are dispersion and interaction impedance of the slow - wave structures ( sws ) in twt, which are very important targets for twt

    行波管慢波結構的色散和耦合阻抗是行波管設計中兩個非常重要的冷參量,它們決定了整支管子的工作電壓、寬度、工作和增益。
  20. Field use and test shows that, ( 1 ) the coupler drive system improves the soft characteristics in the starting and transmission of the pumping unit ; ( 2 ) the new drive system solves the problems of drive slippage and frequent change of rubber belt ; ( 3 ) it provides large transmission rate and enables adjusting the stroke number optionally ; ( 4 ) the system efficiency of the pumping unit can be improved and power consumption can be lowered by using the coupler drive system

    現場應用測試表明: ( 1 )耦合器傳動系統可改善抽油機啟動和傳動中的軟特性,提高整機和抽油桿的使用壽命; ( 2 )解決了抽油機膠傳動中打滑「丟轉」和繁更換膠等問題; ( 3 )實現了抽油機大傳動比,沖次任意可調,從而滿足供液不足油井和稠油注蒸汽生產井的不同需要; ( 4 )可提高抽油機系統2 . 24 % ,日耗電量下降39 . 6 % 。
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