晶體基本頻率 的英文怎麼說

中文拼音 [jīngtǐjīběnbīnlǜ]
晶體基本頻率 英文
crystal fundamental
  • 晶 : Ⅰ形容詞（光亮） brilliant; glittering Ⅱ名詞1. （水晶） quartz; （rock） crystal 2. （晶體） any crystalline substance
  • 體 : 體構詞成分。
  • 本 : i 名詞1 （草木的莖或根）stem or root of plants 2 （事物的根源）foundation; origin; basis 3 （本錢...
  • 頻 : 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...
  • 率 : 率名詞（比值） rate; ratio; proportion
  • 晶體 : [晶體學] crystal; vitrella; crystal body; crystalloid; x-tal
  • 頻率 : frequency; rate
  1. 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，通信頻帶資源緊張，音頻傳輸帶寬有限且復雜多變，而各種音頻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頻數據的壓縮演算法，兼考慮了編碼效率、多碼率和壓縮時延多個方面，並在matlab環境下做了模擬實驗，對各種音頻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效果，達到多碼率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，可以有效應用於實際復雜多變信源編碼。
  2. Cryptogrammic chip introduced in this paper has been tested on the altera ' s apex20ke fpga. the main clock frequency reached 40mhz. the chip includes 30, 000 les. in order to utilize esb resource in altera ' s chip, we adopted embedded rom and ram and can realize the function of whole system with only one chip. lt is the embodiment of methodology and notion of sopc ( system on a programmable chip ). the simulation of this cryptogrammic chip proves the correctness of function of the chip, which shows that the important ideology based reconfigurable architecture has special significance in designing of cryptogrammic chip

    本文所闡述的密碼晶元在altera公司的apex20kefpga上進行了測試。工作頻率達到了40mhz ，佔用了3萬個le . ，利用altera器件的esb資源，採用內置ram和內置rom設計方法，用一片晶元即可實現整個系統的功能，充分體現了sopc的設計方法和理念，對晶元的模擬和測試均證明晶元功能正確，表明基於可重組體系結構這一重要思想在密碼晶元設計中具有特殊的意義。該晶元的設計遵循hdl設計方法學的一般方法。
  3. A patch antenna with etched holes on the ground plane is also studied. the performance of the antenna at the resonant frequency is analyzed by using the fdtd method together with the pml boundary treatment. the results show that the surface waves are suppressed greatly, the bandwidth is improved and a 1 odb reduction on the sidelobe level is achieved at the 110 and 260 directions in the e plane

    全面地研究了地面腐蝕周期圓孔結構的電磁晶體貼片天線在基波頻率處的性能，用fdtd方法並結合pml邊界處理技術對該天線所取得的研究結果顯示，本文設計的地面腐蝕型電磁晶體結構抑制了貼片天線中的表面波，增加了天線的帶寬，並有效地削弱了旁瓣，使天線的e面方向圖上110和260方向的兩個旁瓣被削弱了10db 。
  4. 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，從四能級速率方程出發，推導了ld泵浦nd ： yag激光器的閾值、輸出功率和斜效率的表達式，並簡述了激光器的工作原理、結構型式和倍頻方法；其次，以空間相關的速率方程為基礎，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、最佳輸出耦合率、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率ld泵浦nd ： yag激光器和透鏡組耦合高功率ld泵浦nd ： yag激光器，對激光器的輸出功率和功率穩定性等特性進行了實驗研究；再次，在帶尾纖輸出的高功率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率的影響規律，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，激光輸出功率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率，隨著泵浦功率的增加，測量范圍擴大，靈敏度提高，當端面泵浦功率為7 . 24w （最大輸出功率為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 。
  5. The concept of " timing " in the article is not the clock in our ordinary living, but syntheses which is made up of some frequency source in the signal generator ( such as cs atom frequency standard, rb clock & high accuracy quartz crystal oscillator ) which produces the primary frequency, the matching input interface and the matching output interface and controlling circuit etc. for example, bits is a kind of timing equipment, which is used to control the timing of some functions

    本文論及的「時鐘」概念不是指日常生活中使用的鐘表，而是由產生基準頻率的信號發生器（如銫原子頻率標準、銣鐘及高精度石英晶體振蕩器等）中的某種頻率源以及相配套的輸入、輸出介面和控制電路等組成的一整套具有特定同步定時功能的綜合體。如bits就是一種時鐘設備，它提供用在通信系統中控制某些功能的定時的時間基準設備，時鐘提供的信號稱為基準信號、定時信號或同步信號。
  6. 4 ) the tuning characteristics of doubly - resonant optical parametric oscillator propo ) output by changing crystal ' s temperature, opo ' s cavity length and pump frequency respectively are theoretically analyzed and experimental obtained the wavelength of the opo output can be tuned from 2038nm to 2227nm by the crystal ' s temperature changed of 5. 3, from 2044nm to 2219nm by the cavity length changed of 514nm, and 375mhz by the pump frequency continuously tuned 750mhz

    當晶體溫度變化5 . 3時，得到2038nm - 2227nm可調諧下轉換光輸出；當opo的腔長相對于簡並點腔長變化514nm時，得到2044nm - 2219nm可調諧下轉換光輸出：當泵浦光頻率連續的改變了750mhz時，下轉換光的頻率相應連續調諧375mhz 。理論擬合與實驗結果基本一致。
  7. Measurement of quartz crystal unit parameters by zero phase technique in a - network ; part 3 : basic method for the measurement of two - terminal parameters of quartz crystal units up to 200 mhz by phase technique in a w - network with compensation of the parallel capacitance c

    在型網路中用零相位技術測量石英晶體單元參數.第3部分:在具有並聯電容c補償的w型網路中用相位技術測量頻率200mhz及以下石英晶體單元的二端參數的基本方法
  8. A infrared system with which can detecte the pulse of human. because human body are semitransparent, and the transparence of it change along with the heart beat. the infrared sensor can detecte the change, we may tanslate the signal from sensor into a digital form by a cmos ic. when the signal change into a digital form, another ic can get the rhythm of the heart from the analog ic. this article designed the anologe ic which got the sensor signal into digital form

    本論文完成了一個基於反射型紅外線傳感器的cmos模擬專用集成電路的設計，它構成的紅外系統具有探測心跳頻率的功能。設計根據人體組織的半透明度會隨心臟跳動而變化的特點，由傳感器探測到這一變化，通過專用集成電路將信號放大並利用，獲得心跳頻率。本模擬晶元結合數字電路可計算即時心率或統計心跳總數。
  9. The basic principle and characteristics of optical frequency conversion technology based on the photonic crystals are firstly summarized in the paper ; then, the current developments of frequency conversion of photonic crystals are also presented ; finally, its importance are pointed out in the tunable laser and other application fields

    摘要文章首先介紹了光子晶體光學頻率變換技術的基本原理和技術特點；然後簡述光子晶體光學頻率變換技術研究進展情況；最後指出了光子晶體變頻技術在可調諧激光器和其它領域中的應用前景。
  10. A new type high efficiency synchronous step - up dc / dc converter for hand - held device is designed in this thesis. it works in the pfm ( pulse frequency modulating ) mode, and its switching frequency can up to 500 khz. it offers a built - in synchronous rectifier that reduces size and cost by eliminating the need for an external schottky diode and improves overall efficiency by minimizing losses

    本文設計了一種用於移動電子設備的高效同步整流的dc / dc升壓晶元，該晶元採用pfm （脈沖周期調制）調制方式，工作頻率最高可達500khz ，內部集成功率管作為同步整流管，代替傳統的肖特基二極體，導通電阻僅有0 . 4
  11. According to the following design theory : the dsp calculates in real time and produces three phases spwm waves to control the on or off of the 6 igbts in ipm respectively. ipm then inverts the commutated single phase direct current ( insulated gate bipolar transistor ) into three phases alternating current. when modulated signals of spwm are changed, the on - off time of switches also changes, so as to the voltage and frequency of output signals

    本文提出了一種基於dsp （數字信號處理器tms320f240 ）的通用的三相間接變頻電源系統，利用分段同步調製法和混合查表法，實時計算不同頻率下的采樣周期、電壓幅值、輸出脈寬，產生雙極性spwm波形，經驅動放大後用于ipm （ intelligentpowermodule ）中的絕緣柵雙極型晶體管柵級驅動，以控制電源的輸出電壓和頻率，實現變頻電源的智能數字控制。
  12. This paper has designed a inverter power supply of volume 2kva, working frequency 20khz., based on that has analyzed the characteristic of igbt ( insulated gate bipolar transistor ). it was provided the working theory of dc voltage circuit and bridge type invert circuit

    本文在分析了igbt （絕緣柵雙極晶體管）特性的基礎上，設計了一臺容量為2kva 、頻率為20khz的高頻逆變電源。
  13. On basic of researching the principle of phase locked loop, this article analyzes the output signal whose noise characteristics depend on the each part of pll, and designs a scheme to realize the frequency synthesizers using the high performance chips with integrated prescalers and phase detectors. the visualized circuit structure is given in this paper

    本文在研究鎖相環路基本原理的基礎上，分析了鎖相式頻率合成器電路中各部件對環路輸出信號噪聲性能的影響，設計了以一個高性能的集成鎖相環頻率合成器晶元為基礎實現頻率合成的方案，並給出了具體的電路形式。
  14. Firstly, the paper gives an introduction on a new type of frequency control technique. it is a new type of temperature compensated crystal oscillator based on analog storage ( function storage ) technique

    本文首先討論了一種新型頻率控制方法的研究，基於新型的模擬存儲技術構成的一種溫度補償型晶體振蕩器（ ascxo ） 。
  15. The research contents of this paper includes as follows : firstly, design a new type reader based on ti s6700 reader ic and try to enhance the reading distance through adding power amplifier ; secondly, adopt the idea of gpio simulation to produce spi timings to drive s6700. secondly, overcome the shortcoming of general mcu spi port ; thirdly, design the rs232 / rs485 full duplex conversion module, mmi interface in the system ; fourthly, analyze the rfid system communication protocol iso15693 and find out the working processes and realization of the instruction ; lastly, discuss the communication safety and accidental factors including the checkout and collision design, illustrate the realization of crc and anti - collision arithmetic theory

    本論文的主要研究內容包括: （一）設計基於s6700閱讀器晶元的新型閱讀器，通過使用對中高頻閱讀器外加功率放大模塊的方法，實現較遠距離通信。 （二）採用單片機通用口三線模擬的方法模擬通用spi口時序，克服其不可位操作的缺點，實現對s6700的驅動。 （三）在rfid系統中集成設計了rs232 / rs485通訊模塊、液晶顯示模塊等，著重說明了其軟硬體實現方法。
  16. The basic principle of feedback crystal oscillator is analyzed. the basic concept of frequency stability is also introduced, following by the usual expression of phase noise in frequency domain and phase jitter in time domain. further, we describe the origin of crystal oscillator ' s phase noise and phase jitter, also list a variety of its contributors

    然後從理論上分析了反饋型晶體振蕩器的基本工作原理，並闡述頻率穩定度的概念，給出了在頻域中相位噪聲和時域中相位抖動的表示方法，形成原因以及影響相位抖動的諸多因素。
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