相干長度 的英文怎麼說

中文拼音 [xiānggānzhǎng]
相干長度 英文
coherence length
  • : 相Ⅰ名詞1 (相貌; 外貌) looks; appearance 2 (坐、立等的姿態) bearing; posture 3 [物理學] (相位...
  • : 干Ⅰ名詞1 (事物的主體或 重要部分) trunk; main part 2 (幹部的簡稱) short for cadre Ⅱ動詞1 (做...
  • : 長Ⅰ形容詞1 (年紀較大) older; elder; senior 2 (排行最大) eldest; oldest Ⅱ名詞(領導人) chief;...
  • : 度動詞[書面語] (推測; 估計) surmise; estimate
  • 相干 : 1 (多用於否定句或疑問句) have to do with; be concerned with 2 [物理學] coherent; 相干散射 coher...
  • 長度 : length; longitude; size; extent; footage
  1. In this paper, based on land use maps of 1976, 1988, 2003, which were interpreted from the landsat mss / tm / etm imageries, and the map of main road, with the buffer analysis tool in arcgis 8, we studied the land use and land cover change on the two sides of the main roads in xishuangbanna, then we studied the impact of population density and the topographic factor on road effects. during the study both the comprehensive land use dynamic degree model and the land use degree comprehensive index model are taken into account, we put forward a compensatory model ? “ amendatory comprehensive land use dynamic degree model ”

    由於人類活動擾強加大,公路效應深不斷擴展, 1976年為5km , 1988年為7km , 2003年達到11km ;受自然、社會條件的影響,不同路段的公路效應存在較大差異,甚至同一路段兩側效應也各不同。 1976年至2003年,距公路不同距離范圍內的人口密都在增加,且距離公路越近,人口數量密越大、增越快,人口分布有向公路兩側聚集的趨勢。選取人口密為大、中、小三個樣區分別分析公路效應的范圍表明,人口密
  2. In the third chapter, the ratio of soil evaporation to crop transpiration under different furrow irrigation ways adopted in summer maize field was analyzed by using the measured data in lysimeters

    與固定隔溝灌比,交替隔溝灌土溝的濕交替循環不會使根區部分土壤出現期極乾燥的情況,因此對作物根系的生和吸收比較有利。
  3. The phase - shifting interference is a osculant and high precision technology base on the wavelength. because of the different size of object being measured leading to different size of interference wave which brings on asymmetry of the interference wave ineluctably we adopt the zoom lens to improve the measurement precision. considering the interferometer ’ s sensitivity to the vibration the interferometer is often used in the lab which restricts it being used widely

    涉術是以光波波為單位的非接觸式高精測量技術,為了使大小各異的被測元件產生的涉條紋尺寸大小一致而引入了變焦鏡頭,從而不可避免地導致涉條紋亮暗不均勻和照改變的問題,最終影響測量精
  4. The high - power semiconductor quantum well ( qw ) laser is a kind of luminescence device with superior performance, it has longe - lived, low threshold current density, high efficiency, high luminosity and excellent monochromatic, coherence, directionality, etc. the high - power semiconductor laser is widely applied to the fields, such as military, industrial machining, communication, information processing, medical treatment, etc. the material ' s epitaxy is the foundation of the whole laser ' s fabricating, and it has important influence on the optics and electricity performance about the laser

    大功率半導體量子阱激光器是一種性能優越的發光器件,具有壽命、閾值電流密低、效率高、亮高以及良好的單色性、性、方向性等特點,廣泛應用於軍事、工業加工、通信及信息處理、醫療保健等領域。材料的外延生是整個激光器器件製作的基礎,對器件的光學和電學性能有著重要的影響,生不出優質的材料體系,獲得高性能的器件就無從談起,因此,材料的外延生便成為了整個半導體激光器製作過程之中的重中之重。
  5. The short - baseline interferometer ’ s angle measurement accuracy is influenced by phase difference measuring accuracy, the base length measuring accuracy, the system operating wavelength ( frequency ) and so on, the article analyzes the existing theory, and emphatically analyzes the influence of base length measuring accuracy to the precision of angle measurement

    短基線涉儀測角精位差測量精、基線測量精、系統工作波(頻率)測量精等因素的影響,文中,在對原有理論進行分析的基礎上著重分析了基線測量精對系統角測量精的影響。
  6. Due to the short distance among the planes which fly in a group, the conventional low resolution radar can not distinguish them in both distance and azimuth ? if we use the technology of isar to resolve the difference among doppler frequency of the targets and obtain a fine resolution cross - cross image, we may separate them, but a long time of coherent processing is needed <, for the formation targets, it can be approximately divided to rigid body and nonrigid body, so for the formation targets, that can be regarded as rigid which has a relative position and an identical movement, can be approximately considered as a large target, and be compensated by translational phase with the rule of minimum entropy, but for the most those cannot accord with the approximation of rigid, being the doppler - frequency of the aim is linear changed, by the relax method with short data, increases the resolving performance of multiple target to the aim in the frequency domain, since cross - range resolution is based on the accumulative time, so it is greatly improve the resolution to formation targets by the instant cross - range image which produced by radon - wigner transformation

    低分辨isan成像及涉技術應用研究一因此直接無法分辨編隊目標的架數,我們借鑒isar的技術,通過較時間的積累,在多普勒頻域上對目標進行分辨。而對于編隊目標,可分為近似剛性的多目標和非剛性的多目標,所以對于可以近似為剛體的編隊目標對位置固定,運動方式一致,可以近似看作一個大目標,採用最小墑準則對平動位的進行補償,但是大多數並不滿足剛體近似的編隊目標,由於目標在積累時間的多普勒頻率近似呈線性變化,通過對較短數據利用relax的時頻分析方法,提高了頻率域上目標分辨的性能。由於橫向解析取塊于橫向積累時間,所以利用radnwigner變換得到瞬時的一維橫向距離像大大提高了對編隊目標的分辨,對模擬和實測數據的大量分析結果表明此方法的有效性和可行。
  7. The scattering intensity of rough surface is computed, while the roughness, polarization, observation station and the refractive index are different, and the wavelength of incident light is 0. 48 m. the results indicates the rougher the rough surface is, the less the coherent scattering is ; the influence of the smaller refrective index is more than larger one by the polarization

    計算了入射光波為0 . 48 m時,不同粗糙,偏振態,散射角以及不同折射率的粗糙面散射強,結果表明,粗糙面越粗糙,散射越小,非散射越強;偏振態對折射率大的粗糙介質面影響較小,對折射率較小的介質面的影響較大。
  8. Mean, variance, standard deviation, coefficient of variation of fourteen vital morphological characters indicated that great diversity existed either among species or among populations, with cv ranging from 28. 89 - 122. 36 % ( except dtm, which has a cv of 4. 72 % ). correlation analysis indicated that il showed a significant positive correlations with pfk ll and lw ( p < 0. 05 ), but a negative correlation with nm ( p < 0. 05 ). there were also strong positive correlations between each other of ll, lw, la and sw

    關分析表明,節間與株高、葉、葉寬呈顯著正關,而與主莖節數呈顯著負關;葉、葉寬、葉面積、千粒重四個性狀互之間存在極顯著正關;重和單株種子產量兩者之間存在極顯著正關;出苗率與千粒重之間存在顯著負關;生習性與分枝數之間存在顯著正關;全生育天數與生習性之間存在顯著負關。
  9. The goal of this paper is to study fully developed turbulent pipe flow. with the aid of the tripping annulus at the inlet, based on the experimental investigation and numerical simulation, detailed researches on a few basic rules in pipe flow have been performed, such as mean velocity profile, relative intensity of turbulence, the log - law, von karman ' s constant and reattachment length, thus filling some gaps in the research work of predecessors and obtaining a far - reaching understanding

    本文的目的就是利用入口擋環進一步探索充分發展的圓管湍流,通過實驗和數值模擬對圓管湍流的若基本規律,如平均速分佈、對湍流強、對數定律、馮?卡門常數和再附著等進行詳細的研究,以填補前人研究中的一些空白,並獲得更深入的了解。
  10. The contents of this theory are divided into six parts, they are : ( 1 ) self - organized criticality, transient chaos, the edge of chaos and weak chaos ; ( 2 ) the coupling and interactions as well as the coherence and cooperation of multicomponents ; ( 3 ) the fractal dynamics of evolutionary processes ; ( 4 ) the spatio - temporal structures of processes ; ( 5 ) the dynamics of fractal growth ; ( 6 ) the theory of finite - size scaling

    將上述命題演繹和整合成一種廣泛適用於地質系統的地球科學的復雜性理論,名之為: 「地質作用的自組織臨界過程動力學? ?地質系統在混沌邊緣分形生」 ,並將其內容歸納成6部分: ( 1 )自組織臨界性、瞬態混沌、混沌邊緣和弱混沌, ( 2 )多組分的耦合與互作用及其與協同, ( 3 )演化過程的分形動力學, ( 4 )作用的時空結構, ( 5 )分形生動力學, ( 6 )有限大小標理論。
  11. Seismic response analysis of a long - span cable - stayed bridge under random seismic excitations with spatial variations, including travelling effect, incoherence effect and local site effect, was made with stochastic method

    摘要以南京第二江大橋南漢橋為例,採用隨機振動分析方法研究了地震動的空間變化特性,包括行波效應、部分效應以及局部場地效應對大跨斜拉橋地震響應的影響。
  12. With double - frequency technique and q switch technique the laser delivers a laser pulse of 532 - nm in wavelength, 5 - ns in pulse width, 35 - mj in energy and 2 - cm in coherent length

    所用激光器為nd : yag脈沖激光器,採用了調q和二倍頻技術,波為0 . 532 、脈沖寬為7ns 、相干長度為2cm ,能量為35mj 。
  13. So it becomes the most competitive new type of gyroscope. the interference fog is in the application process. the resonance fog needs shorter fiber or waveguide to realize the same sensitivity, comparing with the interference fog it can realize integration in silicon planar waveguide module and integration of ring cavity, input and output optical circuits and modulator in single chip of planar waveguide

    涉式光纖陀螺比,為達到同樣的靈敏,諧振式光學陀螺需要的光纖或波導要短幾十倍,並可以進一步實現將環形腔、輸入輸出光路、調制器等集成在單片平面波導上,特別適合於研製微型光學陀螺。
  14. The resonation fog needs shorter fiber or waveguide to realize the same sensitivity, comparing with the interference fog. it can realize integration in silicon planar waveguide module and integration of ring cavity, input and output optical circuits and modulator in single chip of planar waveguide. it fits the rmog very much, which stands for the trend of miniaturization of gyroscope

    涉式光纖陀螺已經進入實用化階段,與涉式光纖陀螺比,達到同樣的靈敏,諧振式光學陀螺需要的光纖或波導要短得多,可以實現將環形腔、輸入輸出光路、調制器等在單片平面波導上的集成,特別適合於微型光學陀螺( rmog ) ,代表將來陀螺小型化的發展趨勢。
  15. Chapter 4 : the paraxial propagation of partially coherent beams with the hermite - gaussian mode is investigated. the more generalized and simple expressions of the mean squared width and the beam quality factor of the beam with different mode order are obtained in terms of the cross - spectral density. our re - sults show that the higher order strengthens the variations of the mean beam width and the beam quality factor for partially coherent beams, and the relation between the two parameters of partially coherent beams is independent of the coherence length

    第四章:初步探索了部分厄米高斯光的傍軸傳輸,根據交叉光譜密得到了其不同模階數的平均光束束寬和光束質量因子更一般的解析表達式,較高的模階數使得光束展寬得越快,光束質量變差,且這兩個光束參量的關系與部分厄米高斯光的相干長度無關。
  16. Because mz interferometric optical fiber gyroscope has bigger nonreciprocal phase, the system thermal stability, polarization noise and the error caused by the fluctuation of light source is particular analysed, some effective methods is proposed such as : using the " quasi - white - light " interferometry and the fiber polish technology accurately to control the fiber length, using depolarization light to minish the polarization error, and using temperature control, optical power control and depolarizer to stabilize the output of the light source

    結合mz涉式光纖陀螺的存在較大非互易移的特點,著重從其溫穩定性、偏振噪聲以及光源波動引起的誤差三個方面分析了抑制噪聲、提高檢測精的方法,提出了:採用「準白光」涉測量法結合光纖研磨技術精確控制光纖差的辦法;採用非偏振光源抑制偏振噪聲的方法;採用溫控制、功率控制以及消偏器實現穩定化陀螺光源的方法。
  17. The results indicate that drying thickness, radiant temperature and pressure of drying chamber are the most three significant factors. there ' s hardly any relationship between freezing rate and drying time, the sublimation drying time of slow freezing material is shorter than quick freezing one, but its desorption drying time is relatively longer, so the total drying time is approximately the same. the initial freezing temperature and freezing manner has little influence on vacuum freeze drying process

    試驗表明:凍、加熱板溫、系統的真空是最重要的三個過程參數;凍結速率對總凍時間沒有影響,慢凍物料的升華乾燥時間要比快凍物料短,但慢凍的解析時間對較,兩者的總凍時間差很小;初始凍結溫對凍過程的影響可以忽略。
  18. Abstract : one of the unsolved problems of the high power application of high temperature superconductors is how to lower the energy dissipation induced by flux motion. due to the extremely high anisotropy, small coherence length and weak pinning potential, the mixed state phase diagram which is tightly related to the flux dynamics becomes very complicated. a brief account is given of the field induced crossover of criticalities of energy dissipation, which has been observed in our recent sensitive electromagnetic measurement

    文摘:高溫超導體在強電方面應用的關鍵問題是如何克服磁通運動所造成的能量損耗.由於存在極強的各向異性、短的相干長度和小的磁通釘扎勢,因此與磁通運動緊密關的混合態圖變得很復雜.文章綜述了根據一系列靈敏的電磁測量所觀察到的磁場誘導的能量耗散行為的轉變
  19. Finally, the two dimensional flow in the diffuser is calculated, the results show that the change of ma makes an effect to the performance of the diffuser. owing to the accretion of ma, the action of oblique shock waves and the boundary layer pricks up, the flow separates from the wall where the shock waves impinge on the boundary layer more quickly, the cluster of diamond shock waves becomes larger. moreover, by comparing the change of flow field under different structure parameter, it is found that the augment of length of constant area section alter the structure of fluid field little, a smaller area ratio and larger angle of compression section make the diffuser working better

    最後,針對擴壓器中的二維流場進行了數值模擬,結果表明馬赫數對擴壓器性能影響較大,隨著馬赫數的增大,擴壓器管道內激波-附面層擾加劇,流動從附面層分離應加劇,激波串數目增多;通過比較不同結構參數下的擴壓器內流場,發現等直段的變化幾乎沒有改變流場結構,只是對局部流場稍有影響,並且在其它參數不變的情況下,一定范圍內減小面積比a2 / a1和增大收縮角有利於擴壓器性能的提高。
  20. This thesis describes a all fiber optic accelerometer based on t - g double beam interferometer, the whole system include a coherent source whose wavelength is 1310nm, a flexural optic fiber disk act as sensing unit, photodetector, piezoelectric ceramic act as a phase modulator and signal processing circuit. the all fiber optic accelerometer described in the paper has many desirable engineering features which include : broad frequency response ; high sensitivity to measurands ; antielectromagnetic interference and small size

    本課題研究的是一種基於泰曼-格林( t - g )雙光束涉儀原理的光纖加速計,系統主要包括:中心波為1 . 31 m的ld光源、起傳感作用的光纖柔性盤、光探測器( pin ) 、位調制用的壓電陶瓷以及信號處理系統。
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