方向聚焦 的英文怎麼說

中文拼音 [fāngxiàngjùjiāo]
方向聚焦 英文
direction focusing
  • 方 : Ⅰ名詞1 （方形; 方體） square 2 [數學] （乘方） involution; power 3 （方向） direction 4 （方面） ...
  • 聚 : 動詞（聚集; 聚積） assemble; gather; get together
  • 焦 : Ⅰ形容詞1 （物體受熱失去水分 呈現黃黑色並發硬、發脆） burnt; scorched; charred 2 （著急） worried;...
  • 方向 : direction; orientation
  • 聚焦 : [物理學] （使光或電子束等聚集於一點） focus; focusing; concentrate
  1. 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 。
  2. A cyclic radial shearing interferometer was used to diagnose the wavefront distortion of a laser system and an lcslm ( liquid crysnd spatial ligh modulator ) was used to control it. some results have been summarized as follows : l. according to the theory of scalar quanity diffeaction and the model of the random gaussian phase screen of low frequency wavefront, the effect of the low frequency wavefront with different rms gradient on the focal spot of a laser beam was studied

    本論文在激光光束波前畸變檢測和控制上進行了新的探索，主要就空間相位調制環路徑向剪切干涉儀以及它對波前畸變的檢測和液晶空間光調制器及其對中頻段波前畸變的控制進行了研究，其研究的內容和取得的成果如下：一、根據標量衍射理論，結合低頻波前畸變的高斯隨機位相分佈模型，研究了不同均方根梯度低頻畸變波前對激光光束焦斑聚焦性的影響，並採用描述中頻段波前畸變的功率譜密度概念，模擬計算了它對激光焦斑旁瓣的貢獻。
  3. With the constant development of the reformation of higher education system, the curriculum reformation has been becoming the discussion focus in the higher education field in china. the key to this issue is to understand clearly the status quo of the university curriculum in our country. from both the dimensions of theory and practice, this artile analyses the embodiment of university curriculum knowledgization by discussing the curriculum target, the curriculum compilation, the curriculum implementing and the curriculum estimate in our country. basing om this analysis, we conclude that deepening the realization to the essentials of university curriculum theoretically and giving prominence to the educational functions of university curriculum practically should be the inevitable choice of deepening the university curriculum reformation in our country

    隨著我國高等教育體制改革的不斷深入，大學課程的改革日益成為我國高等教育領域中的聚焦點，朝什麼方向、如何改革我國大學課程，關鍵在於深刻把握我國大學課程的現狀.本文在理論和實踐兩個維度上，從課程目標、課程內容、課程實施和課程評價等四個方面分析了我國大學課程知識化特徵的表現，指出在理論上深化對大學課程本質的認識，在實踐中凸現大學課程本來應具有的教育意義，應該是深化我國課程改革的必然選擇
  4. This paper ' s study is focused on the principle of bistatic sar on the basis of giving a brief introduction of sar principle, including azimuth resolution, mapping width, focusing deepness, pulse repetition frequency limitation and radar equation etc. then the paper studies the special form of bistatic sar with stationary transmitter

    在簡要介紹了合成孔徑雷達的成像原理后，本文著重從原理方面對雙站sar進行了分析，討論雙站sar的方位向解析度，測繪帶寬，聚焦深度，脈沖重復頻率限制，雷達方程等問題，然後對發射機固定的雙站sar這種特殊的雙站sar模式進行分析。
  5. In strategy implementation, the thesis proposes the practical function strategysuggestions to support the focus strategy, for instance : combine group institutional framework and cultivate the corporate culture of guangmang, strengthen cooperation with rival, promote the vertical and integrated strategic alliance, implement value chain control cost and seek the important market

    在戰略實施方面，論文提出了具有可操作性的職能戰略建議，如：整合集團組織結構，培育光芒企業文化；加強與競爭對手的合作；促進縱向一體化的戰略聯盟；實施價值鏈控製成本，尋求重點市場突破來支持基於低成本的聚焦戰略實施。
  6. In chapter 4, it is simulated that a probe beam and a pump beam counter - propagate in a two - dimensional self - defocusing medium and thorough analyses are made to the induced focusing in this configuration

    第四章，用分步傅立葉方法模擬雙光束在二維自散焦介質中的對向共同傳輸過程，對出現的誘導聚焦現象進行了系統的分析。
  7. This research project, based on the existing problems in mathematics curriculum evaluation and the conceptions of mathematics curriculum as the guideline, systematically analyzes the basic characteristics of the developmental evaluation, i. e. multi - dimensional, formative, developmental, understanding and inspiring. drawing on the modern mathematics conceptions, multi - intelligence theory and theories of constructivism, this project systemically illustrated the connotation of the developmental evaluation : the key of evaluation is for application ; the goal is multi - dimensional ; the process is context - dependent ; the outcome is to promote the development. in view of the conceptions of developmental evaluation ( i. e. human - centered whole evaluation ; quality - focused overall evaluation ; participation - stressed autonomous evaluation ; future - faced evaluation ; guiding evaluation and inspiring evaluation ), the components of the developmental evaluation model in the new mathematics curriculum is analyzed in details in this project ( i. e. goal system, subject system and object system ) and the core structure of the developmental evaluation is established ( i. e. evaluation indicator system model )

    本課題研究以數學課程評價的現存問題為著手點，以數學課程理念為目標指向，系統分析了數學新課程發展性評價的多元性、形成性、發展性、理解性、激勵性等基本特徵;以現代數學觀、多元智力理論、建構主義理論以及成功智力理論為理論背景，系統闡述了數學新課程發展性評價之意蘊?評價核心聚焦應用，評價目標指向多元，評價過程依存情境，評價結果歸依發展;以數學新課程發展性評價理念，即以人為本的全體性評價、注重素質的全面性評價、注重參與的自主性評價、促進完善的引導性評價、不斷進取的激勵性評價、面向未來的期望性評價為航標，深入剖析了數學新課程發展性評價模式的構成成分，即目標系統、主體系統和客體系統，由此構建發展性評價模式的核心圖式?評價指標體系的模式:以數學新課程發展性評價過程為參照，尋求並創設評價準則的設計技術，評價權重的構造技術，評價信息的收集技術，評價結果的分析與處理技術;以數學新課程評價系統內蘊的一般認識論、發生認識論與發展認識論指導評價方法，詳細探討了檔案袋法、表現性評價、自我評價與同伴評定相結合的方法、蘇格拉底式研討評定和測驗法在評價中的應用。
  8. We are glad to find that most studies are based on the information - processing theory. the factors of problems ( task variables, syntax variables, types of problems ), strategies and methods of problem solving are all considered as static and objective knowledge, and the object of instruction is recognized as the transmission of such knowledge

    接下來論文把目光聚焦到數學問題解決興起的源頭以及研究最為集中的美國，通過對過去近20年來的歷史研究進行回顧、總結、反思，可以明晰其研究的特點、方法、結論，並從其研究的制高點進一步探究有價值的研究線索，以此確立進一步研究的目標與方向。
  9. Based on the information above, the focusing and differential strategy is reached to develop the competitive advantages. with this strategy, it does n ' t focus on the scale of enterprise but on the new and high value of product in the specified market to get high profit. and vertical integration would be adapted under the condition of funds accumulation

    在此基礎上，對南方公司今後的戰略發展步驟作了一定的規劃，指出南方公司應採取聚焦差別化的戰略，把發展戰略聚焦在差異化產品更新換代上，為保持在特定市場的優勢地位，不以擴大市場規模為目的，而是以開發高檔次、高附加值產品為方向，這樣才可能獲得豐厚的回報。
  10. The conclusion is that the vectorial effect influences more on the small - scale self - focusing than the non - paraxial effect. a new growing mode existing when the modulation on the direction of polarization is discussed in this chapter

    同時與極化方向平行的新的增益模式有可能出現並可以在波長的尺度上產生自聚焦，文章討論了這種可能性。
  11. Undulate acquisition surface is one of the main properties of the seismic datasets from western china. based on the synthetic source record migration method and wave stack principle, a method of migrating directly from the undulate surface is presented and tested

    結合我國西部地震資料的特點，針對起伏地表情況下的地震數據成像問題，提出了與合成震源記錄偏移方法相應的成像方法以及基於共聚焦點技術的基準面向上校正方法。
  12. According to geometrical focusing theory, the gamma knife can focus in spirals 30 beams of co - 60 gamma rays through a collimator to form a high - quality high - dose radiation field. the size of radiation filed can be varied and shaped according to tumor size for 3d radiotherapy. therefore, it can effectively increase radiation dose to tumor tissues and decease radiation dose to normal tissues

    根據幾何聚焦原理，將30束鈷60伽瑪射線通過準直后經一個固定的軸線旋轉聚焦，形成品質優良的高劑量區分佈，經治療計劃系統的優化，可使高劑量區的劑量分佈，在三維方向上和腫瘤的形狀一致，從而實現三維適形放射治療。
  13. It works by delivering beams of gamma rays into the human body from various directions and focusing them on the target tissue

    它將許多束很細的伽瑪射線從不同的角度和方向照射進人體，並使它們都在一點上匯聚起來形成焦點。
  14. And in addition, the paper explores the aspects of internal fluctuation, which is viewed as the random choices of the cognitive subject, how it is depend on the initial conditions and is enlarged by the method of positive feedback with step by step on the views of the nature, material outlook and thought modes. what ' s more, under the controls of the nonlinear interactions, the paper respectively explores the development principle in the culture of technology and science between the west and the east on the aspect of attractors and the order parameters, which result from the cooperation and competition. finally, the paper correctly formulates the different value preference in accord with the attractors and the order parameters, and focuses respectively on the traditions of the eastern pragmatic preference and the western contemplative preference and technological preference

    在此基礎上，從東西方科技文化的發生和起源入手，從耗散結構的觀點出發，考察了認知主體的隨機性選擇這種文化的內漲落因素，是怎樣依託于各自不同的初始條件?地理氣候條件，在自然觀、物質觀和思想模式方面一步步得到正反饋式的放大;進而，在文化系統內部種種非線性的相互作用下，從競爭和協同所必然產生的序參量和吸引子兩個方面，分別考察了東西方科技文化不同的發展規律，聚焦東方的實用化取向和西方的思辨化、技術化取向的影響機制，從它們在不同時期所發揮的不同作用正面回答了「李約瑟難題」 。
  15. I achieve approximately the increment of sound level in sound focusing region relative to sound incidence ( ? lpc ), and make ascertain the sound pressure level in focusing region accurately. through draw the curve of wrap - up line equation with matlab program of computer software

    文章最後總結出本文理論分析所得的幾個解析式和避免聲聚焦的設計原則，同時在理論和實驗上提出今後研究其它構造時的一些方法和方向。
  16. We discuss the effect on the focusing of the probe beams for the five initial parameters : the amplitude of the pump beam, the separation between the pump and the probe beam centers, the wavelength ratio of the pump and the probe beams and the ratio of the initial beam widths at the directions of x and y. our numerical results show that, more the amplitude of the pump beam, the wavelength ratio of the pump and the probe beams and the ratio of the initial beam widths at the direction of y, more the probe focus ; the separation between the pump and the probe beam centers and the ratio of the initial beam widths at the direction of x have optimum values, respectively

    研究了泵浦光束輸入振幅、泵浦光束-信號光束初始偏移、泵浦光束-信號光束波長比和泵浦光束-信號光束x 、 y方向的初始束寬比五個參量對信號光束聚焦程度的影響。數值模擬結果表明，泵浦光束輸入振幅越大、泵浦光束-信號光束波長比越大、 y方向束寬比越大，信號光束聚焦程度越大；泵浦光束-信號光束初始偏移和x方向初始束寬比都存在一個最佳值，使得光束聚焦達到最佳效果，有趣的是這兩個最佳值的比值基本保持不變約為0 . 4 0 . 6 。
  17. The whole - body gamma knife system is a kind of non - invasive medical instrument by using co - 60 as the gamma ray source. according to geometrically focusing theory, the gamma knife system can precisely focus in spirals 30 beams of gamma rays from different directions to a target through a collimator. by the collimator s direction, the predetermined lesion will be under radiation in heavy dose and subsequently be destroyed completely

    體部伽瑪刀是利用能產生伽瑪射線的鈷60作為放射源，根據幾何聚焦原理，將30束伽瑪射線從不同方向和位置通過準直后經一個固定的軸旋轉聚焦到焦點，形成品質優良的劑量區，將腫瘤組織置於該高劑量區中，即可在預定時間內將病變組織摧毀，體表和焦點以外的正常組織僅受到瞬時照射而基本上不受損傷。
  18. In this thesis, we used the q - switched nd : yag laser pulse focused by lens to pump the cr ~ ( 4 + ) : mg _ 2sio _ 4 crystal, with the pump laser pulse duration and energy of 30ns and 50 mj separately, and got the laser pulse with center wavelength, pulse duration and energy of 1. 22 m, 8. 2 ns and 10 mj on the best work condition. on the base of zhangguowei s approximation about gain - switching and the parameter of cr ~ ( 4 + ) : mg _ 2sio _ 4 crystal, we calculated the time characteristics of cr ~ ( 4 + ) : mg _ 2sio _ 4 laser pulse with rate equation by numerical method, obtained the conclusion that the laser pulse duration is only related to the pump energy and cavity length : the larger the pump energy is, the narrower the pulse duration is ; the longer the cavity is, the wider the

    本論文採用調qnd : yag脈沖激光通過透鏡聚焦后縱向抽運cr ~ （ 4 + ） : mg _ 2sio _ 4晶體，抽運光脈沖寬度為30ns 、能量為50mj ，在較佳工作條件下得到了中心波長為1 . 22 m 、脈寬為8 . 2ns 、能量為10mj的激光脈沖;並在張國威分析增益開關時間特性的近似法基礎上，結合實際的cr ~ （ 4 + ） : mg _ 2sio _ 4激光器的相關參數，從速率方程出發，用數值計算的方法更為精確的模擬了cr ~ （ 4 + ） : mg _ 2sio _ 4激光器輸出激光脈沖的時間特性，得出了激光脈寬只與抽運能量、腔長有關的結論，即抽運能量愈大，脈寬越窄;腔長越長，脈寬則愈寬。
  19. Social capital has become a common notion in social sciences, as sociology, economics, politics and anthropology, etc. it is a reflection of comprehensiveness and relation orientation of contemporary sociological theory. so social capital concept and theory is suitable for the study of chinese society, which has been regarded as the characteristic of relationship and ethic orientation. chapter two reviews the studies on social capital theories in following aspects : origin and revolution of social capital concept, traits and functions, research fields, operation mechanism and measurement of social capital

    第二章從社會資本的概念、特徵、研究領域、功能、運行機制及其測量等方面對社會資本理論作了較為詳盡和系統的述評，並簡要評述了社會資本理論研究中存在的主要問題：首先，對社會資本的定義過于狹隘；其次，許多研究聚焦于社會資本的經濟功能，而對于其社會支持和社會穩定功能及其自身的目的性重視不夠；第三，許多研究在方法論上表現出過于追求定量分析的傾向。
分享友人
分享到 Line

分享到臉書