調頻指數 的英文怎麼說

中文拼音 [diàobīnzhǐshǔ]
調頻指數 英文
fm index
  • 調 : Ⅰ動詞1 (配合得均勻合適) harmonize; suit well; fit in perfectly 2 (使配合得均勻合適) mix; adju...
  • : 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...
  • : 指構詞成分。
  • : 數副詞(屢次) frequently; repeatedly
  • 調頻 : frequency modulation (fm); frequency adjustment調頻磁帶錄音機 f m magnetic tape recorder; 調頻...
  • 指數 : 1. [經] (比數) index number; index 2. [數學] exponent
  1. Through the detailed analysis of the aaf, the defection of using chirp - fourier transform in guidance radar signal processing is pointed out

    通過對加速度模糊函的形態分析也明了針對線性調信號的二次相位匹配處理( chirp - fourier變換)在應用到制導雷達信號處理中所存在的缺陷。
  2. Reforms usually begin with extra indexation and more frequent adjustment of controlled interest rates.

    改革往往始於額外化,或者更加繁地調整控制利率。
  3. The catv charge and control system is mainly composed of the management software 、 the header data modulator and the terminal charge and control equipment. i am responsible for design catv charge and control equipment and test system. the header data modulator is used to encrypt the control single from computer and transmit it into the appointed frequency. the terminal charge and control equipment demodulate out the control single from data modulator and transmit it to the addressing control part, where the demodulated fsk single is received and well - handled by the cpu unit, decode the unauthorized signals and deliver it to the shut point, shut point make use of capability of wideband anf characteristic of shut, then the signal of illegal customer will be turn off and vice versa, the legal customer can receive the normal signal

    前端調制器完成對計算機輸出的控制信號加密處理,將令碼載送到一率點。終端收費控制器解調出控制信號,送至單片機尋址控制部分。單片機尋址控制部分接收經fsk據解調器送來的信號,送入cpu單元后,解出不授權信號,然後向關斷部分送入信號,關斷部分利用pin二極體的寬帶工作能力以及關斷特性,實現對非授權用戶或者非法用戶的信號關斷,使之不能正常收視,繳費用戶進行開通正常收視,達到控制用戶通道的管理。
  4. The basic principle, main properties, typical parameters, technical characteristics and general situation of klystron are introduced. the electron beam prebunching in the modulated cavity and shift tube of relativistic klystron amplifer ( rka ) is studied analytically, a self - consistent equation of radiation generated by the prebunched electron beam in the radiation cavity is derived using the field method of particle ? wave interaction instead of the electrical circuit method, and in terms of it, the gain in the linear regime calculated, a field analysis method is proposed. the theory analysis shows that the characteristic parameters, such as resonance frequency, real part of gap - impedance, external quality fadtor in all kinds of klystron output circuits including single - beam, multi - beam, single - gap, multi - gap, single - beammulti - gap, multi - beam multi - gap klystron output circuit, can be calculated by the field analysis method

    本文系統的介紹了速調管的工作原理、主要特點、發展概況、主要性能標和技術特點,解析的研究了電子束在相對論速調管放大器的調制腔和漂移管中的預群聚;用粒子波互作用的場方法導出了在輻射腔中預群聚電子束產生輻射的自洽方程,同時對線性區的增益進行了計算。理論分析表明,場分析法可用於計算單注單間隙、多注多間隙、單注多間隙和多注多間隙速調管輸出迴路的諧振率、間隙阻抗實部和外觀品質因等特性參
  5. Because of the using of interpolation, noise shaping and switching amplification in the digital audio amplifier technology, the power supply modulator is not only much efficient but also behaving good in envelope amplification, this advantage is hard to implemented with conventional technology

    字音功放技術是近年發展起來的高效率音放大技術,該放大技術採用了過取樣、噪聲整形等字音處理演算法和開關功率放大。採用該技術實現的電源調制器不但具備很高的效率,而且能高標地放大包絡信號,是常規的電源調制技術無法實現的。
  6. After analyzing and comparing different partition rules, md32 pipeline architecture is finally defined, which meets the required instruction function, frequency and timing spec of md32. a complete set of creative design method for risc / dsp md32 micro - architecture is presented, such as parallel design, internal pipeline, central control, etc. thanks to the adoption of these design methodology, control path and data path are separated, circuit delay is reduced, and complex instruction operations are balanced among multiple pipeline stages

    它們將若干復雜令操作均勻分配在幾個流水節拍內完成,實現了任意窗口尋址等復雜令操作,將整個處理器的據通路與控制通路分離,減小了電路時延,從而滿足了risc dsp不同令功能和系統時鐘率的要求,構成了統一的、緊密聯系的、協調的md32系統結構。
  7. Electrical parameter includes voltage, current, power, frequency, power factor, and so on. the adjustment system of electrical network needs many panel instruments that can show the electrical parameter, such as voltage, current, power, cycle etc. tjsually these instrument is not accurate, wastes manpower resource, and the management of the data is inconvenient and easy to mistake. recently the development of micro - electronics technology and the advent of slsi. especially the advent of singlechip, lead to a new revolution in the field of instrument

    電工參一般包括電壓、電流、功率、率、功率因等。在電網調度自動化的設備中需要配置多隻測量顯示上述電工參的鑲嵌式面板表,如電壓表、電流表、功率表等等,其一般均為針式面板表,精度低,可視距離近,據需要人工抄錄,浪費人力資源,據管理不便,容易出錯。
  8. On base of studying domestic and foreign theories and methods for evaluations of st achievements, this thesis analyze 10 methods for evaluations of st achievements, such as application frequency statistics, delphi, literature research and application relevance analysis, etc. by studying and analyzing the work of technology planning bureau, transport ministry between 1991 and 2000, and the evaluation items for the achievement identification, acceptance and check - up which were taken by transportation technology department, the author come up with some methods, which are scientific, standard and quantified, for evaluating transportation st, that is, in accordance with the transportation st achievement management and achievement precise database within eighth five and ninth five, and with the statistic analysis such as research contents, professional classification, intensity input, achievement characteristics, field distribution, characteristics of department undertaken, st talents characteristics, award inf ormation, characteristics and regularity of transportation st achievements, problems that are still existed and countermeasure are forwarded ; according to the requirement of evaluations system of the transportation st achievement, the principle and methods for the system designation are given, and the constitution of the system are provided ; in order to improving the scientific organization and management of our national transportation st achievements, many subjects are under discussion, including institution for evaluation of st achievement, valuation organization, standard for evaluation technology, database for consulting transportation experts and how to simplify the procedure of transportation st achievement, etc.

    本論文在對國內外科技成果評價理論、方法廣泛調查基礎上,研究分析了諸如應用次統計法、德爾菲( delphi )法、文獻調研法、應用相關分析法等10種科技成果評價的方法,通過對1991至2000年交通部科技計劃所實施情況,由交通科技主管部門組織進行了成果鑒定、驗收和評審等成果評價的項目的分析,提出了本人對交通行業對科技成果進行科學、規范和定量地評價的方法,即:在建立「八五」 、 「九五」交通科技成果管理及成果簡要據庫的基礎上,通過對研究內容、專業分類、投入強度、成果屬性、地域分佈、承擔單位屬性、科研人員屬性和獲獎情況等諸多方面進行統計分析,研究了交通科技成果的特點和規律,提出了存在的問題和對策;從建立交通科技成果評價標體系的要求上,具體提出了交通科技成果評價標體系設計原則與方法探討了交通行業科技成果評價標體系的構成及權重確立等問題;從加強我國交通行業科技成果評價的科學化組織與管理出發,探討了如何建立科技成果評價制度、評價機構、統一的評價技術標準和交通行業專家咨詢據庫以及如何簡化交通科技成果評審形式等問題。
  9. Virtual call speculation if a virtual call, or other call through a function pointer, frequently targets a certain function, a profile - guided optimization can insert a conditionally - executed direct call to the frequently - targeted function, and the direct call can be inlined. register allocation

    調用推理如果某個虛調用或其他通過函針的調向特定的函,按配置優化可以將一個按條件執行的直接調用插入這個向的函,並且可以內聯該直接調用。
  10. The system is based on chopper constant current drive technique, according to the top level design idea, adopting advanced specical subdivision control integrate circuit and powerful function 80c196kc to organize the system frame, desiging the minimum system of single - chip microcomputer, multifunction i / o interface circuit, relay switch circuit, keyboard and display circuit, multifunction digital setting interface circuit and so on, utilizing the hso and hsi interface circuit which are owned by this single - chip microcomputer exclusively and its powerful command system to realize dual - degree switch control, automation orientation, automatically searching zero position, locking machine when stopping, frequency to set digitally, automatically adjusting speed through changing frequency, swithing subdivision or squarewave control, on the basis of above, the system also have the function of running according to the setting steps and the frequency, voltage and current to display through the led, etc

    系統基於斬波恆流驅動技術,按照頂層設計思想,採用先進的專用細分控制電路和功能強大的80c196kc單片機來組建系統構架,設計了單片機最小系統、多功能i o介面電路、繼電器切換電路、鍵盤顯示電路和多功能字設定介面電路等,利用該單片機獨有的hso和hsi介面及其強大的令系統,實現了雙余度混合式步進電動機的余度切換控制、自動定位、零位自動搜索、停機鎖定、字化率設定、自動調變速控制、細分方波切換控制,在此基礎上,該系統還設有按預置步運行、 led率電壓相電流顯示等功能。
  11. This article takes hanging off and wide fluctuation of transmition velocity of adsl as example, then analysis centers on the discerte multiple tone and the principle of channel load assignation. from analysis above article points out the root of adsl being sensible of noise signal. at last, reserches effects that window function and barrier effect on frequency and adopts fft to work out the noise power of adsl

    本文以電信現在推出的adsl傳輸中鏈路經常掉線和傳輸速率經常大范圍波動為例,重點分析了adsl所使用的dmt調制方式和注水演算法分配通道載荷方式原理,由此出adsl對噪聲信號敏感的根源,在得到問題的根源之後,分析了窗函和柵欄效應對譜的影響,採用fft方法計算adsl線路的噪聲功率譜,為adsl線路測試提供了可靠的理論依據。
  12. We propose a chaos - based generation of the random ppm - ps signals, design and implement a generator of the ppm - ps signals. we introduce an if sampling technique and simulate the performances of digital demodulation techniques of using hilbert filters, sine filters, bessel filters and poly - phase filters. the poly - phase filtering method can achieve the higher mirror - frequency rejection ratio by using the low order filters

    介紹了中采樣技術,並對希爾伯特濾波法、辛格內插函修正、貝賽爾函插值法及多相濾波法等字解調演算法進行了計算機模擬和性能比較,出多相濾波法能以較低的階實現較高的鏡抑制比。
  13. Telecommunications - fixed radio systems - characteristics and requirements for point - to - point equipment and antennas - part 2 - 2 : harmonized en covering essential requirements of article 3. 2 of r tte directive for digital systems operating in frequency bands where frequency co - ordination is applied v1. 1. 3

    電信.固定無線電系統.點對點設備和天線的特徵和要求.第2 - 2部分:在率協調帶中運行的字系統用包含r tte令3 . 2條款基本要求的協調的en
  14. In succession, the theory of chirped - pulse amplifier system is given in detail, firstly, studying from designing experimental light road and optical components to theoretical analysis, we par ' tly finished the system by ourselves. about ultr a - shoft pulse with a pulse - width of 9. 8f s and output power of 650mw and band - width of about l 20nm is output from oscillator source, secondiy, the stretching capacity of single grating four - pass stretcher is measured using abcd matrix combining collins function, and the effect of relativ e parameters to the streching ratio is also simulated. thirdly, a new type of disjunctional frequency moduiating function is provided according to the gain - narrowing and gain - saturation which are appeared in the co urse of amplification, under modulating the two effects are both controlled on some e xtent, fourthiy, the effect of ase that is often ignored by people is analyzed and the resolving methods are also given

    從光路、光學元件的自行設計到理論分析計算,初步建立了一臺實驗系統;採用abcd矩陣法結合collins公式計算了四通式單光柵展寬器的展寬量,並模擬了相關參對展寬比的影響,對實驗具有導意義;評價了再生放大器和多通放大器的優缺點,對放大過程中通常忽略的放大自發輻射現象( ase )進行了分析,並提出了相應的解決方法;針對放大過程中出現的增益窄化和增益飽和現象,對輸入種子脈沖提出了一種新的分段調制函,實現了對增益窄化效應和增益飽和效應的共同抑制;提出了系統的材料(包括放大介質和光路中的普通介質)正是融合高階色散的來源。
  15. The concept of otn node transmission model is introduced. the requirement of otn node transmission model is discussed. this model uses the frequency domain transmission matrix to express the otn node transport characteristics. the simplified model based on wdm and im - dd systems, the relationship between node characteristics and model parameters and measurement of model parameters are also discussed. at last a briefly discussion on how to develop the otn simulation and cad software based on our model is demonstrated

    在線性時不變的假設下,提出利用域傳輸矩陣來表示節點傳輸特性的方法給出了oxc和oadm兩類光傳送網節點的統一的表示根據目前通用的波分復用強度調制直接檢波系統的特點對復雜的域傳輸矩陣進行了簡化並對通常所關心的節點主要性能標與模型參的關系模型參的測量和計算模型的設計與計算機模擬輔助設計軟體開發的銜接問題進行了討論。
  16. The general requirement of communication system and the application potential in secure communication are expatiated. the chaotic secure communication methods home and abroad are also summarized, including chaos spread spectrum communication, chaos key - shifting, chaos parameter modulation, chaos masking, chaos cdma. the exiting problems and development direction are also pointed out respectively

    介紹了混沌學的發展過程和意義,闡述了通信系統的一般要求和混沌在保密通信中的應用潛力,綜述了國內外現有的混沌保密通信方法,其中包括:混沌擴通信,混沌鍵控,混沌參調制,混沌掩蓋,混沌字碼分多址等五大類,出了各自存在的問題和發展方向。
  17. Some modulation parameters, such as the carrier frequency and the symbol rate, can be estimated prior to the recognition of modulation types. such other parameters as the modulation index, the modulation frequency deviation, and the signal broadband can be further estimated after recognition

    部分調制參如載波率、符號速率在識別之前獲得,在識別完成之後可以進一步估計調調偏、信號帶寬等其餘參
  18. With the analyses of the relationship figure between iri and velocity of representative road profile wavelength, the change trend between iri and vehicle velocity wasn ' t monotone increasing and was mainly affected by free vibration frequency of vehicle system

    通過分析典型路面波長國際平整度與行駛車速的關系圖,發現國際平整度與速度之間不是單調增長關系,除路面因素外,兩者之間的變化趨勢主要受車輛系統自振率的影響。
  19. This paper gives a detailed account of the waveform, matched - filter, fuzzy function, resolution in speed, resolution in range and the capacity of anti - interference of the chirp signal. it deals with several methods to produce chirp signal and the advantages and disadvantages of these methods. it describes the working principle and performance of dds, analyses the phase errors initiated by the phase truncation and proposes a new scheme to solve the error

    本文詳細介紹了以下幾個方面:線性調信號的波形、匹配濾波器、模糊函、速度分辨力、距離分辨力及抗干擾能力;產生線性調信號的幾種方法並簡要分析了各種方法的優缺點; dds的工作原理、性能標,分析了相位截斷產生的相位誤差,並提出解決這種誤差的新方案;設計了一個產生線性調信號的具體電路。
  20. This paper proposes a two - armed push - pull inverter, including its topologies, power distributions in every switching devices and modulation schemes. the major parameters such as thd and df of this vsi are analyzed. comparison study shows that the quality of two - armed push - pull vsi is better than those of square - wave vsi. and the switching loss is lower than that of pwm scheme at same time, especially used in wide frequency range. detailed calculating formulae and experimental results are presented

    該文介紹了一種雙臂推挽式逆變器,包括其電路拓撲、每個開關器件的功率分佈和調制策略.分析了這種電壓源逆變器的主要參,如總諧波失真度( thd )和失真( df ) .比較研究表明,這種逆變器的質量明顯優于方波逆變器,同時開關損耗明顯低於pwm調制方式,特別適用於寬范圍.介紹了計算公式和實驗結果
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