modulation device 中文意思是什麼

modulation device 解釋
調制設備
  • modulation : n 調整，調節；（聲調的）抑揚，變化；【音樂】轉調，變調；【無線電】調制。 amplitude modulation 振...
  • device : n. 1. 設計，計劃；方法，手段。2. 〈pl. 〉意志，慾望。3. 謀略，策略，詭計。4. 器具，器械，設備，裝置。5. 圖案，圖樣；花樣；紋章；標記，商標；（紋章上的）題銘。
  1. Intelligent pulse code modulation ( inpcm ), one of the new access device, is a promising hi - teach boasting of economization, and need network management to realize its intelligence

    智能pcm （ inpcm ）是一種具有廣闊發展前景的新型接入設備，需要網路管理系統來實現其智能化。
  2. By using knife edge as object, and cmos sensor as device for image analyzing, we get edge spread function from the image and use differential operation and fft to obtain modulation transfer function of the lens, then its image quality is known

    以刀口作為目標物，以cmos作為圖像分析器件，從圖像中獲取刀口函數，經微分和fft運算，得到成像鏡頭的mtf （調制傳遞函數） ，從而得知其成像品質。
  3. This incrementally changes the transconductance of the device, leading to a modulation effect

    這一效應會緩慢地改變元件的跨導，從而導致調制效應。
  4. The study has completed the design of two - phase inverter and made up of the two - phase inverter - motor system for experimental use it is a variable frequency adjustable speed system with a open - loop control of rotational speed, which consists of voltage - controlled oscillator circulating assign device inverter circuit and two - phase induction motor a accurate mathematical model is set based on the whole system, and simulator program of dynamic and steady condition is established, which is used to calculate the dynamic and steady performance by kron and symmetrical coordinate converter by simulator calculation and experimental research with specific parameter of the system, a comparison is made between predicted and experimental characteristics, experimental measurements are shown to compare closely with corresponding theoretical result it is compared with some variable frequency adjus table speed system comprising inverter and single - phase induction motor from the system efficiency torque pulsation and the effect of two - phase inverter capacitance based on the conclusion, harmonic cancellation pulse width modulation control of a two - phase inverter - fed induction - motor drive system is researched, which cancelled the low harmonic and improve the system performance

    通過對電機的kron變換和對稱分量變換，建立了系統較精確的數學模型，編制了系統動態及穩態運行的模擬計算程序分別計算系統的動態和穩態性能。通過對系統的具體參數進行了模擬運算和實驗研究，實驗和模擬結果進行比較，說明實驗和理論較為一致，並從系統效率、轉矩脈動及兩相逆變器電容的影響等方面與各種逆變器和單相異步電動機組成的變頻調速系統加以比較。在此基礎上，對兩相逆變器供電-異步電動機系統使用諧波抑制pwm控制進行了研究，由於減少了低次諧波，改善了系統性能。
  5. In this field, swing modulation by the polarize device were designed, this method was the base of our spatial light modulator

    在這一方面的探索中，人們創立了通過偏振器件完成振幅調制的方法，這種方法是本空間光調制器的基礎。
  6. Fiber - optic fabry - perot sensor is a kind of high precision interferometric fiber - optic sensor, so this kind of sensor has a bright future. this sensor can be classified into 3 kinds of sensors by their demodulation device. these are intensity modulation / demodulation fiber - optic fabry - perot sensor, phase modulation / demodulation fiber - optic fabry - perot sensor and white - light interferometer modulation / demodulation fiber - optic fabry - perot sensor

    按照信號解調裝置的不同該種傳感器可分為三類：強度調制解調型、相位調制解調型和白光干涉儀調制解調型光纖fp傳感器，其中后兩種採用寬光譜光源，是白光干涉型光纖fp傳感器。
  7. At last, we introduced the design of demodulation device of white - light interferometer modulation / demodulation fiber - optic fabry - perot sensor. we provide the ways to improve the property of sensor. we performed a experiment to test the capability of our sensor to strain gauge, and applied our sensor into study on carbon fiber material temperature property

    最後討論了白光干涉型光纖fp傳感器信號解調裝置的設計，提出了改進該種傳感器性能的方法，並對該傳感器系統與電阻應變片作了對比實驗，將該種傳感器用於了碳纖維材料的溫度性能實驗中。
  8. A novel current control mode pulse width modulation switched high frequency resonant arc igniting device is developed based on uc3842 and the principle is analyzed

    摘要採用uc3842設計了電流控制型脈寬調制開關式高頻振蕩引弧器，並對其工作原理進行了分析。
  9. The tests of e - o applications by our flux ktp has been realized, the results showed : optical waveguides fabricated by using an ion - exchange process, which have an exchange - ion concentration depth profile and refractive - index profile, is close to a complementary error - function distribution, optical homogeneity and device thermal stability is much better. amplitude modulation switch formed by our flux ktp has the contrast ratio of 150 : 1 and insert loss is 2. 5 % at 1064 nm. high quality optical pulse with 1 ns width was cut successfully by using an e - o modulator from a laser pulse with 50 ns width, this modulator had run for three years, and the crystal did n ' t blackened, it showed our low conductivity flux ktp can endure high modulation voltage for a very long time

    Ktp晶體的電光應用試驗表明：用離子交換法製作的電光波導，其離子交換濃度、折射率變化符合餘弦誤差函數，光學均勻性以及器件的溫度穩定性較好；製作的強度調制電光開關，消光比為150 ： 1 ，對1064nm激光的插入損耗為2 . 5 ；製作的電光調制器用於激光脈沖整形試驗，從脈沖寬度50ns的激光脈沖削出脈寬1ns的高質量光脈沖，該電光開關經過長達三年多的使用，沒有出現晶體變黑現象，說明本實驗的低電導率ktp晶體能夠耐受長時間的調制電壓。
  10. The hybrid method can simulate accurately both the imaging and polarization - dependent diffraction characteristics of a concave grating. to meet the growing need for flattened passband in a practical wdmsystem, three design methods, namely, the tapered output waveguide structure with air - slots, the three - focal - point method and the analytical method of spatial phase modulation, are introduced to achieve a passband - flattened diffraction grating device

    針對實際光通信應用中對通帶帶寬的需求，本文提出了「結合空氣槽的漸變輸出波導結構方法」 、 「三焦點方法」及「顯式公式空間相位調製法」三種使平面集成型衍射光柵波分復用器件獲得平頂型頻譜響應的優化設計方法。
  11. Testing and monitoring device of frequency speed modulation system

    變頻調速系統的測試監控裝置
  12. In order to reduce the influence of the laser diode ’ s heat effect, a thermal control device is designed to make laser diode work under a stable temperature. the principle and application of ic - wkn is researched adequately. a signal modulation circuit including d / a converter and chip computer is designed

    由於溫度變化也會影響到半導體激光器的正常工作，為了減小環境溫度變化和激光器的熱效應對激光器本身及其輸出造成的影響，本文將半導體激光器和溫度控制裝置設計在一起，使激光器能夠在恆溫下工作。
  13. Hfets ( modulation doped ) : modfets ? basic device, theory. deep level problem ( transconductance collapse ) ; pseudomorphic solution. telecommunications applications ? key features : gain, bandwidth, linearly, noise

    調節摻雜場效電晶體-基本元件，理論。深能階問題（電導崩塌）與假晶方案。通訊應用-主要特點：增益，頻寬，線性度，雜訊。
  14. The thesis is organized as follows : an overview of wireless and multimedia communication is presented and a wireless image communication system is proposed in chapter 1 ; chapter 2 makes a brief introduction on image signal capture device and related software implementation ; source coding is mainly studied in chapter 3, followed by in - depth modulation techniques studies in chapter 4

    第二章對視頻信號採集的硬體設備和軟體實現分別介紹；第三章介紹視頻信號的壓縮；第四章分析了用於視頻信號無線傳輸的硬體設備? ? orinoco無線網卡所採用的調制解調技術並介紹了網卡的工作原理。
  15. The main circuit adopt boost converter topology ; the control circuit is made up of adsp - 21065l core processor, a / d converter and cpld which realize the functions of digital pulse width modulation ( dpwm ) and address decoding ; the auxiliary power supply afford work voltage of every device

    。 st變換器拓撲結構；控制電路主要由核處理器adsp 、 21065l 、 al3轉換器和實現dpwm及地址解碼功能的cpld等器件組成；輔助電源電路為控制電路中各器件提供工作電壓。
  16. This paper aims at the realization of variable - frequency induction motor speed modulation systems based on cpld ( complex programmable logic device )

    本文主要介紹了如何用可編程邏輯器件（ cpld ）實現變頻調速控制系統。
  17. The design of cdma terminal chip is a very actual value and extensive application problem in the field of cdma technology application. with the development of micro - electronics technology, the design of integrated circuit has stepped into the age of soc ( system on chip ), which provide a brand - new method for cdma communication system project. in this paper, a design of cdma2000 1x spread modulation soc has be researched with large scale field programmle gate array device, and make a certain results

    Cdma終端晶元設計是cdma技術應用領域中一個具有重要實際應用價值和廣闊應用前景的研究課題。隨著微電子技術的發展，集成電路設計進入了片上系統時代，這為cdma移動通信系統設計提供了一個全新的技術手段。本文將基於cdma技術，用大規模可編程邏輯器件對第三代移動通信cdma20001x的擴頻調製片上系統設計做了進一步的探討和研究，並取得了一定的成果。
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