選擇波導 的英文怎麼說

中文拼音 [xuǎnzháibōdǎo]
選擇波導 英文
selective waveguide
  • 選 : Ⅰ動詞1. （挑選） select; choose; pick 2. （選舉） elect Ⅱ名詞（挑選出來編在一起的作品） selections; anthology
  • 擇 : 擇動詞（挑選） select; pick; choose
  • 波 : Ⅰ名詞1 （波浪） wave 2 [物理學] （振動傳播的過程） wave 3 （意外變化） an unexpected turn of even...
  • 導 : 動詞1. （引導） lead; guide 2. （傳導） transmit; conduct 3. （開導） instruct; teach; give guidance to
  • 選擇 : select; choose; opt; election; choice; culling; alternative
  • 波導 : [物理學] （用在微波波段傳輸電磁波的裝置） waveguide; duct
  1. And understanding and studying the spectral features and variation rules of geo - targets in the experimental area, raising that it is the basis of geo - targets information collection with imaging spectrometer data to understand spectral features and variation rules of geo - targets, realizing that in a great extent spectral - integrated - form - based classification method can remove the phenomenon of " different spectrum with same objects " resulted from reflection ratio curve translation because of the angle change among sensor, targets and observation direction, and the average and variance images can be introduced to solve the problem of two kinds of geo - target with similar spectral forms and much different values of whole reflection ratio. it is suggested that " red edge " range bands of vegetation, which has close relationship with vegetation cover and biomass, is the main characteristic bands and important basis for careful vegetation classification and quantitative retrieval, and pixel - based derivative spectral analysis is very useful for removing the effects of soil background values and quantitatively retrieving vegetation biomass and cover. the remote sense quantitative retrieval model is developed for main appraisable factors of desertification monitoring assessment with imaging spectrometer data and then the applicability of model is analyzed

    研究結果如下：首先針對荒漠化地區的地物特徵，對高光譜數據不同波段的數據質量、波段組合進行了評價，提出了適用於荒漠化監測的基本波段選擇集；初步了解和掌握了研究地區的地物光譜特性及變異規律，進一步明確了掌握地物光譜特徵和變異規律是用成像光譜儀數據提取地物信息的基礎；發現了基於光譜整體形狀的分類方法在很大程度上能夠消除由於傳感器、地物目標觀測方向之間的角度變化引起的反射率曲線整體平移的「同物異譜」現象，對于譜形相似而整體反射率的值相差較大的兩類地物，通過引入均值和方差圖像參與分類得到解決；研究還表明在植被「紅邊」范圍內的波段是進行荒漠化監測的主要特徵波段，這些波段與植被生物量和蓋度都有密切的關系，是開展精細植被分類研究和植被定量反演的重要基礎；像元的導數光譜分析可以消除土壤背景的影響，是進行植被生物量和蓋度定量反演的有力工具；建立了荒漠化監測主要評價因子的定量反演模型，並分析了模型的適用性。
  2. Precessing stars do radiate gravitational waves, but they ' re not the only ones. any asymmetry about the rotation axis will do

    進動的星體確實會輻射引力波，但它們並非唯一的選擇。繞旋轉軸的任何不對稱都會導致引力波的產生。
  3. Regional theory directs space locating of daily urban system periphery in daily urban system or broader region range. centre - periphery theory require the development of daily urban system periphery think over radiant function of daily urban system center, and try to make trickling - down effect have more power than backwash effect. competitive edge theory and innovation theory explain that daily urban system periphery plays an important role in daily urban system in chongqing municipality and supports a selected measure of accelerating development in beibei district

    區位理論指導著都市圈外圍區在都市圈及更大區域范圍中的空間定位；核心一邊緣理論則要求，都市圈外圍區的發展應充分考慮都市圈核心區的輻射作用，並積極實現「涓滴效應」強于「回波效應」 ；競爭優勢理論和創新理論則認為，都市圈外圍區在重慶都市圈中將會扮演重要角色，也支撐著北暗區實現加速發展的途徑選擇。
  4. The chip of microbridge structure thermocouple type microwave power sensor is designed by using seeback domino offect of thermocouple. ta2n of relatively low resistor - temperature coefficient and si of relatively high thermoelectric power seebeck coefficient are used as thermocouple materials in the chip

    微梁結構熱偶微波功率傳感器晶元就是利用熱偶的塞貝克效應設計的，晶元選擇具有低電阻溫度系數的ta2n和具有高熱電系數的半導體單晶si作為熱偶材料。
  5. This paper gives a method to measure the conductivity base on choosing frequency. after adding to the electrode with two ac square waves of appropriate frequencies, we can measure the output dc voltage of the circuit

    本論文提出了一種選頻電導率測量方法，選擇兩個合適頻率的交流方波施加於電極，測出電路輸出直流電壓，通過解方程組求出時間常數，然後求得溶液電阻，進而得到溶液電導率。
  6. The main job of this research is : ( 1 ) analyze the operation situation of power system during faults ; pay attention to the traveling wave on the three - phase transmission line ; study the equation of voltage on three - phase transmission line with impedance capacitance coupling between phases ; contact the voltage on any point with the fault voltage, study the singularity of the voltage signal in fault point, and make it to be the base of the new fault detection method ; ( 2 ) apply the singularity detection theory based on wavelet analysis to the power system faults detection, give a complementary criterion to current fault detection criterion, study how to select the basic wavelet, how to filter noise, how to detect the singular point or fault point, and finally give a total solution. the simulations prove it to be a quick, correct and effective fault detection method

    本文的主要工作有： （ 1 ）分析電力系統在發生故障時的運行狀態，尤其對三相傳輸線上的故障行波進行了分析和研究，推導了考慮相間耦合的三相傳輸線電壓方程，並將傳輸線上任一點的電壓與故障點電壓建立起聯系，得出了傳輸線上電壓信號在故障點處的奇異性，並以此作為構造新的故障檢測演算法的理論基礎； （ 2 ）將基於小波變換的信號奇異性檢測理論運用於電力系統故障檢測中，針對目前相關研究的不足，提出了電力系統故障檢測判據的補充判據，通過對基本小波的選擇、除噪措施、信號奇異點也即故障點的檢測方法所作的分析，給出了一個可行的解決方案；模擬研究表明：這是一個快速、準確、有效的故障檢測演算法。
  7. ( 4 ) since there is no perfect theoretical guide, the characteristics of orthogonal wavelet, semi - orthogonal wavelet and biorthogonal wavelet in signal decomposition and reconstruction are compared, and the conclusion of the study demonstrates that semi - orthogonal wavelet is a good wavelet for fault diagnosis in tilting control system of tilting train. a new approach is presented for deciding the fault threshold. ( 5 ) a generalized wavelet neural network is put forward by integrating wavelet analysis with neural network

    （ 4 ）針對小波基的選擇缺乏完善理論指導的實際情況，通過對常用的正交、半正交、雙正交小波基提取信號特性的比較，確定出了適合擺式列車傾擺控制系統故障診斷的小波基? ?半正交小波基，並提出了一種新的確定故障檢測閾值的方法，可以快速地檢測出故障發生時刻。
  8. In this paper, it is expounded the relationship of two - channel perfect reconstruction filter banks to wavelet transform on the base of signal processing and engineering application ; avoiding complex path formula deduction, the selection of a desirable mother wavelet function becomes the design of two - channel perfect reconstruction filter banks

    摘要從信號處理和工程應用的角度出發，避開了復雜的數學公式推導，闡述了雙通道濾波?組與小波變換的關系，並討論了母小波函數的選擇可歸結為正交鏡像濾波器的設計。
  9. Furthermore, utilizing the characteristic that filtering error covariance expresses filtering precision and the principle of information conservation, the dynamic and reasonable distribution of distributed tracks weight coefficient is accomplished. jerk model and strong tracking filter is organically assembled, and based on spatio - temporal synthetically analysis and lme, a self - learning estimation method of the system measurement variance is given. the method improves obviously the

    3 、將jerk模型與強跟蹤濾波演算法有機地結合，並利用時空綜合分析和極大似然估計的思想推導出了一種系統量測方差自學習修正方法，以優化強跟蹤濾波演算法中次優漸消因子和濾波增益的在線選擇，同時根據多傳感器數據融合具有改善濾波精度的性質，進而給出一種基於jerk模型的多傳感器數據融合演算法。
  10. We considered the frequency chosen character of erf and its modulatory ability may be owe to the coupling of microwave and the polaritons. at the same time there may be other coupling effect and excitation too

    初步認為頻率選擇性及透過強度可調控性與電流變液和微波之間的相互作用導致的極化激元之間的禍合有關。
  11. The bandwidth of this kind of twt can reach 30 - 40 % if choosing the optimal parameters of the structure and the beam

    因此，合理選擇慢波結構幾何尺寸和電子注參數，具有中心導體軸螺旋槽行波管的相對工作帶寬可以達到30 ? 40 。
  12. The dissertation gives a comment on the field of energy - transmitting fibers for mid - infrared laser, an introduction to the mechanism of infrared - transmitting fibers in view of radiations and waveguides, and a theoretical analyze of the layer - selecting method for the fibers with multi - layer dielectric films. in view of the properties of sic in the region of mid - infrared, the author has done many works about the energy - transmitting fibers with sic, and summarized as follows : first, it is found that sic is a very good material for the fabrication of power - transmitting fibers for mid - infrared laser, especially for co2 laser that works at 10. 6um wavelength, and sic / sio2 hollow fibers has not been studied in the world for the first time to our knowledge. second, it is pointed out, for the first time to our knowledge, that the hollow fibers with a structure like si / sic / sio2 or ge / sic / sio2 have very good properties for the mid - infrared laser power transmitting, especially for co2 laser

    本論文評述了關于中紅外傳能光纖的國內外進展，從光射線理論和波導理論出發介紹了紅外傳能光纖的傳輸機理，從薄膜光學出發分析了多層介質膜傳能光纖的膜層選擇機理等基礎理論，針對碳化硅（ sic ）在中紅外區的特點，在導師侯藍田教授領導的科研組已有成果的基礎上進行了以下幾個方面的研究：發現了sic是制備紅外傳能光纖的良好的紅外材料， sic sio _ 2空芯傳能光纖在國際上還沒有人進行研究：提出了具有si sic sio _ 2和ge sic sio _ 2膜結構的空芯傳能光纖，據我們所知，這種光纖目前在國內外還沒有人進行研究，並對其傳輸性能進行了可行性分析。
  13. Energy spectrum ananlysis using wavelet technique is studied and applied to deal with feature exstraction of missile fault signals, from which a feasible feature vector is created, to be used by the fdes based on inn. parameters for diagnosis are also selected based on two different criteria : the cluster divergence of sample datas and the diagnosis reliability of parameter candidates

    研究了小波能量譜分析技術在地空導彈故障數據特徵提取方面的應用；提出了基於樣本綜合離散度和參數診斷置信度兩種診斷參數選擇的方法，從而為基於集成神經網路的故障診斷做好了準備。
  14. In this paper, on the basis of increasingly mature fabrication technologies of planar integrated waveguide and the optical fiber grating, we make use of not only the ( de ) multiplexing and wavelength router characteristic of arrayed waveguide grating ( awg ), but also the dispersion peculiarity of uniform fiber bragg grating ( ufbg ). then a kind of dispersion compensator, which can compensate the dispersion of the optic signal in every channel in the wdm system respectively, is devised. the method makes the compensation efficiency maximum theoretically

    本文結合近幾年來日益成熟起來的平面集成波導製作工藝和光纖光柵製作技術，利用陣列波導光柵（ awg ）的復用特性和波長路由選擇特性與均勻光纖光柵（ ufbg ）的色散特性，提出了一種能對wdm系統中各分波光信號分別進行有針對性色散補償的補償器件，該器件使wdm系統中各分波光信號所得到的色散補償在理論上達到很高效率。
  15. On the detail contents of the study, first of all, under the guidance of the basic theory of the integration of intelligence and capital, it made an analysis of the cooperative intentions of both datong and shuguang at their respective positions and affirmed the positive significance of their cooperation. secondly, it conducted a detail analysis of investment values of shuguang co. from three sectors of its exterior environment, rd & marketing capabilities and finance to make sure what are its strong and weak points, and its internal potentials and the urgent problems it should handle and giving a clear picture of the investment value by investing shuguang. thirdly, based on funding and fund use plans of shuguang co., it analyzed its urgent demand of investment from datong co. and has done a basic calculation of investment return and reached a possible win - win conclusion

    文章在深入調查的基礎上，選擇了較為典型的知識型企業成都曙光股份和典型的資本密集型企業寧波大通股份為研究對象；在研究內容和方法上，首先以知識與資本結合的基本理論為指導，對大通股份與曙光股份的合作意向分別站在各自立場上進行了分析，肯定了雙方合作的積極意義；其次對曙光股份的投資價值從外部環境、研發和營銷能力以及財務三個方面作了較為詳盡的分析，確認了其強弱項、內在潛力和急需應對的問題，凸現出投資曙光股份的價值所在；第三，針對曙光股份的籌資用資計劃分析了該公司急需大通投資的客觀要求，並對用資效益進行了初步測算，得出了有望出現雙贏效果的結論；第四，探討了適宜於大通股份的投資方式，在此基礎上設計出大通股份參股曙光股份的投資方案，並進行了較為系統的可行性研究，證明了投資方案的可行性；最後，對大通股份投資曙光股份后進行整合與管理提出了初步設想。
  16. Using the microwave selective heating property for materials, by setup equivalent equation, and first time inducing the electromagnetic field perturbation theory to the design of heating materials for substrate in mpcvd, three temperature distribution modes were established, including temperature distribution comprehensive mode of inhomogeneous plasma, temperature distribution composite mode of composite substrate materials, temperature distribution perturbation mode of composite materials, which ii provided an whole new technology route to the design of substrate heating system in mpcvd and guided the preparation of heating materials for substrate. and then the heating materials for substrate were designed and optimized to obtain large area homogeneous temperature distribution even larger than substrate holder ' s diameter. as an important part, this thesis researched the nucleation and growth of diamond films in mpcvd, systematically researched the effects of substrate pretreatment, methane concentration, deposition pressure and substrate temperature etc experimental technologic parameters on diamond films " quality on ( 100 ) single crystal silicon substrate in the process of mpcvd, characterized the films qualities in laser raman spectra ( raman ), x - ray diffraction ( xrd ), scanning electron microscopy ( sem ), infrared transmission spectra ( ir ), atomic force microscopy ( afm ), determined the optimum parameters for mpcvd high quality diamond in the mpcvd - 4 mode system

    該系統可通過沉積參數的精確控制，以控制沉積過程，減少金剛石膜生長過程中的缺陷，並採用光纖光譜儀檢測分析等離子體的可見光光譜以監測微波等離體化學氣相沉積過程；利用微波對材料的選擇加熱特性，通過構造等效方程，並首次將電磁場攝動理論引入到mpcvd的基片加熱材料的設計中，建立了非均勻等離子體溫度場綜合模型、復合介質基片材料的復合溫度場模型及復合介質材料溫度場攝動模型，為mpcvd的基片加熱系統設計提供了一條全新的技術路線以指導基片加熱材料的制備，並對基片加熱材料進行了設計和優選，以獲取大面積均勻的溫度場區，甚至獲得大於基片臺尺寸的均勻溫度區；作為研究重點之一，開展了微波等離體化學氣相沉積金剛石的成核與生長研究，系統地研究了在（ 100 ）單晶硅基片上mpcvd沉積金剛石膜的實驗過程中，基片預處理、甲烷濃度、沉積氣壓、基體溫度等不同實驗工藝參數對金剛石薄膜質量的影響，分別用raman光譜、 x射線衍射（ xrd ） 、掃描電鏡（ sem ） 、紅外透射光譜（ ir ） 、原子力顯微鏡（ afm ）對薄膜進行了表徵，確立了該系統上mpcvd金剛石膜的最佳的實驗工藝參數。
  17. The optical switch with double - heterostructure gaas / gaalas has low switching - voltage and light loss. and the boa - type optical switch utilizes maximum modal dispersion ( a p ), does not require a specific fabrication length or length range to operate, has simple structure, and can exhibit very high extinction - ration from its two output ports ; so it is suitable for a 2 x 2 unit of optical switch array

    而boa型結構（或稱為零間隙定向耦合型）光開關利用了最大的模色散（ ） ，不需要嚴格控制特殊的製造長度或製造范圍，結構簡單，從其兩個輸出端可以得到很高的消光比，是一種很好的2 2波導型光開關單元，同時也是光開關陣列的一種較好的選擇。
  18. Abstract : the equivalent step planar wave - guide method is proposed to studythe propagation properties and design of diffused planar wave - guide. the model was established, and a set of simulation has been done, and a series of relationship curves among the parameters of wave - guide propagation, structure and technics are obtained. these curves are helpful to diffused planar wave - guide design and technical parameter selection

    文摘:本文引入一種研究擴散光波導傳播特性及設計計算的新方法? ?等效階躍平板波導方法.建立了擴散平板光波導的等效階躍平板波導模型，進行了一系列的模擬計算，得出了一系列波導傳播參量、結構參量與工藝參量之間的關系曲線.這些曲線對于擴散平板光波導的設計計算、工藝參量選擇等具有重要指導意義
  19. Through analyzing the transfer losses, the appreciate waveguide mode is selected as the working mode

    通過分析波導傳輸損耗，選擇出最合適的導波模式作為工作模式。
  20. Guide for choosing modular dimensions for waveguide components

    選擇波導元件模數尺寸的導則
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