晶體基頻 的英文怎麼說

中文拼音 [jīngtǐjībīn]
晶體基頻 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。
  • 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...
  • 晶體 : [晶體學] crystal; vitrella; crystal body; crystalloid; x-tal
  1. Based on the crystal structure of astrophyllite, we examined the infrared spectra of monoclinic and triclinic astrophyllites, contrast the infrared spectral features of both astrophyllite minerals, and discuss the assignments of infrared absorption frequencies

    在新測定的星葉石晶體結構資料的基礎上，對星葉石礦物進行了詳細的紅外光譜研究，對比了單斜及三斜星葉石的紅外光譜特徵，並對星葉石中紅外吸收振動頻率的歸屬問題進行了討論。
  2. This thesis was divided into eight chapters, and the main results and innovations obtained here can be summarized as follows : ( 1 ) the physics model of tsrs in frequency conversion crystals has been built up firstly. based on quantum - mechanical viewpoints and the following physical processes and parameters : the two - photo interaction of light with matter, paraxial diffraction of stokes, langevin noise sources, reflection at the faces and the edges of crystals, gain coefficient, beam aperture, pulse width and fluence of 3, the physics model of tsrs in kdp and kdp crystals acting as high - fluence frequency convector and the paraxial operator maxwell - bloch - langevin equations have been built up

    全文共分八章，取得的主要成果及創新點如下： （ 1 ）首次建立了諧波轉換晶體的tsrs物理模型本文根據量子力學原理，在考慮如下物理過程和參量的基礎上：光與物質的雙光子相互作用； stokes光的傍軸衍射； langevin （郎茲萬）噪聲源；晶體表面反射和端面反射；增益系數、光束口徑、脈寬和三倍頻光能量密度，推導出高通量激光在kdp和kd ~ * p諧波轉換晶體中的tsrs物理模型和空間上的近軸算符maxwell - bloch - langevin方程組。
  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. With argumentation and comparing the difficulty of developing in different ways, in multimedia communication the terminal make up with mpeg - 4 encoder and decoder based on vw2010 chip, main controller based on x86 core and pc compatible stpc soc chip, ethernet adapter based on rtl8139. and this hardware platform can run linux operation system. the following works are done by auther. 1. participate in designing the project of multimedia terminal

    經過論證和比較，權衡了開發難度和系統性能，在多媒體視頻會議終端設計中採用了基於x86內核片上系統晶元stpc的主控制器模塊，基於vw2010晶元的mpeg - 4音視頻編解碼器模塊，基於rtl8139晶元的10m / 100m以太網適配器模塊的硬體架構，主控制模塊運行linux操作系統，作為多媒體終端的軟體運行環境及軟體開發環境。
  5. Abstract : in view of the crystal structure, this paper repo rts thecharacter of single crystal growth of germanate and the properties as me dium of laser crystal. the study and progress in germanate crystals used as widel y tunable laser crystal, self - doubling - frequency crystal and highly efficient and low pumping threshold laser crystal are introduced

    文摘:從晶體結構上分析了鍺酸鹽的單晶生長和作為激光晶體基質的特點，並介紹了鍺酸鹽作為可調諧激光晶體，自倍頻晶體，高轉換效率和低泵浦閾值的激光晶體的研究及進展。
  6. The stability output second harmonic generation ( shg ) experiment results of single - longitudinal mode and multi - longitudinal mode with long cavity were explained reasonably with these rate equations. the high polarization of fundamental wave in the isotropic laser media nd : yag with type - i critical phase - matching lbo was studied with the rate equations including polarization of fundamental light. using the polarization function of lbo, a quartz full - wave plate was introduced into the cavity, a kind of birefringent filter by considering the combination of the polarization function of the type - i critical phase - matching doubling frequency crystal lbo and the quartz whole - wave plate was constructed

    將腔內多縱模倍頻速率方程推廣應用到準三能級藍光激光器中，分析了一個縱模、兩個縱模、多個縱模時的噪聲情況，合理地解釋了實驗中激光器單縱模運轉以及長腔多縱模運轉時穩定輸出的實驗現象，同時利用該速率方程分析了以各向同性激光晶體nd : yag為工作物質，類臨界相位匹配lbo為倍頻晶體的藍光激光器中基頻光偏振特性，合理利用類臨界相位匹配lbo倍頻晶體的偏振特性與引入的石英晶體全波片構成雙折射濾光片，通過選單頻來抑制噪聲，獲得了藍光低噪聲的穩定輸出。
  7. 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 。
  8. 4. according to the cefgshg, the fundamental light radius was optimized when the length of bbo crystal was constant. 5

    根據所推導的高斯光束倍頻轉換效率公式，對bbo倍頻晶體在長度確定的情況下，對基頻光斑進行了優化。
  9. 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。
  10. 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。
  11. Objective : construct effective mathematic model to analyse the piezoelectric frequency data of pt test based on the theoretic analysis of viscosity and density changes in coagulation reaction system and discuss the feasibility of detecting patients ’ samples in clinic, on the

    方法: 1 .選用基頻為10mhz的at切型銀膜電極石英晶體傳感器構建螺旋式檢測池，使不同檢測池具有同質性。在傳感器上下各墊加一o形硅膠密封圈，並置於金屬基座上。
  12. According to the raman selection rule and the pl measurement, it is reasonable to evaluate the quality of galnp / algalnp mqw by analyzing the relative intensity ratio of a1p - lo / to. ( 4 ) a new modified random element isodisplacement ( mrei ) model is set up to calculate the dependence between the long - wavelength optical phonon frequencies and the composition of iii - v - type ab1 - xcx mixed crystals. the second neighbor force constants are still assumed to be a linear variation with the composition, but the two first neighbor force constants can be evaluated to be a negative exponent variation with the composition, using the overlapped repulsive potential of the ion crystal combination

    通過實驗我們找到了在這些結構參數上生產gainp algainpmqw的較理想的結果； （ 3 ）首次用喇曼（ raman ）散射方法研究了常溫下的gainp algainp多量子阱結構，除了指認出喇曼光譜中各光學聲子模外，還結合樣品光致發光譜的測量結果，分析發現喇曼光譜中alp - lo to的相對強度比可以在一定程度上評定晶體gainp algainpmqw的生長質量； （ 4 ）在修正的隨機元素等位移? mrei模型的基礎上建立了一個新模型，計算了ab _ （ 1 - x ） c _ x型?族半導體混晶的長波長光學聲子模頻率的組分變化關系。
  13. In the section 1, we have introduced the background and the recent advance of the flattened gaussian beam ; in the section 2, for the first time, we have calculated the type - i and type - ii shg conversion efficiency and simulated curves versus the crystal length, the pumping light polarization rate, the order of the flattened gaussian beam and the pumped power intensity, we obtain ed that the highest efficiency was influenced by the order and the polarization rate of the pumped flattened gaussian beam

    從三波耦合方程及clbo晶體的光學特性出發，討論了以平頂高斯光束入射時穩態的三波耦合方程的大信號倍頻解（包括類及類相位匹配的倍頻解） 。計算了其在clbo晶體上的倍頻轉換效率與晶體長度，基波偏振分量比，基波階數及泵浦波強度之間的相互影響關系曲線。得出影響平頂高斯光束的最高轉換效率的因素是基波的階數n和泵浦波的偏振分量比d 。
  14. With the theoretical and experimental methods, the characters of cr4 + : yag are studied from cr4 + : yag as passive q - switching in nd : yag laser, intracavity frequency - doubling of q - switching laser and dual - wavelength laser, which is based on cr4 + : yag ' s operations of saturable absorption and laser gaining medium. chapter 1 : introducing the cr4 + : yag ' s optical function, the general research situation and the main idea of this thesis

    本論文基於cr ~ （ 4 + ） yag晶體既可以作為nd yag激光器的被動調q開關、又可以作為激光增益介質的特點，採用理論和實驗相結合的研究方法，詳細而具體的研究了cr ~ （ 4 + ） yag晶體被動調q 、調q倍頻和雙波長激光輸出的特性。
  15. 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
  16. At low frequencies, the current in the collector of a transistor is in phase with the applied current at the base

    在低頻段，晶體管的集電極電流與施加在基級的電流同相。
  17. 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。
  18. 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。
  19. Analog temperature compensation crystal oscillator ( atcxo ) is widely used in electronic equipments such as communications, navigation, radar, mobile telephone, program control telephone, measure instruments etc. as their reference frequency source, it is critical part of the above equipments, called as their “ heart ”

    模擬溫度補償晶體振蕩器（ atcxo ）廣泛應用於通信、導航、雷達、移動通信、程式控制電話、測量儀器等電子設備中。作為基準頻率源，它是上述電子設備的關鍵部件，被稱為此類電子設備的「心臟」 。
  20. In the last chapter, a novel method of optical voltage sensing based on second harmonic generation in periodically poled linb03 is proposed

    本文最後一部分，從光學電壓傳感器的原理出發，在周期性極化鈮酸晶體倍頻效應基礎上，提出了一種新的光學電壓傳感方法。
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