聚焦型式 的英文怎麼說
中文拼音 [jùjiāoxíngshì]
聚焦型式
英文
type of focus-
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 。This equipment utilizing the principal of rtaary focusing, the technique of double barriers and auomatic program, fulfils the breakthrough on high - dose, high precision conformal radiotherapy thechnique. it is integrated with advanced omagine equipment such as ct, mri and pet, and also with the world most advanced 128 guide double - video synchronied electro - encephalographic long - distance monitoring system for evaluation of eepilepsy patients pre - operation, in the operation and after operation. it combines multi - academic branches such as the department of neural medicine, neurosurgery, oncology, radiotherapy and imaginary, to form a combined therapeutic system
擁有世界先進的大型醫療設備旋轉式頭部體部伽瑪刀，該設備利用旋轉聚焦原理雙重屏蔽技術及自動化的治療程序，實現了大劑量高精度適形放療的技術突破，與先進的ct mri pet等影像設備及世界最先進的128導全數字化癲癇術前術中術后定位評估系統實現配套，形成了聯系神經內外科腫瘤科放療科影像科等多學科的綜合治療體系。2. we design a configuration of frequency - doubler according to the optimum focus condition and the cavity stability condition | a + d | < 2 and optimize it based on " mode - matching " and " optimum coupling ". 99. 96 % of optical impedance - match efficiency and over 95 % of spatial mode - matching efficiency are achieved eventually by using t = 10 % of input coupler in our experiment
（ 2 ）根據最佳聚焦條件和腔的穩定性條件（ | a + d | 2 ）對四鏡環型倍頻腔進行了設計，並分別從「模式匹配」和「最佳輸入耦合鏡透射率的選擇」兩方面著手對腔進行優化，在我們的實驗中採用10的輸入耦合鏡，獲得阻抗匹配效率為99 . 96 ，空間模式匹配效率高於95以上的模式。Economy review in this new era demonstrate distinctive characteristics of economy transformation by presenting a change of writing form the tendency of " pan - politics " to its original role as economy commentary, form " summary of experience " to " observer of economy situation ", from avoiding economy puzzles to analyzing them thoroughly, from focus on simply one factory, one store to a thorough interpretation with the globe situation as its background
從「泛政治化」傾向到經濟評論本位的回歸，從「經驗總結」到「經濟航船的瞭望者」 ，從經濟難題的「迴避者」到「解剖者」 ，從「一廠一店式」聚焦到廣闊背景下的透視，顯示了經濟述評在經濟轉型時期的鮮明特徵。The author of this article thinks it significant to choose to investigate into the rural family aged supporting pattern in southern mountain areas of anhui province as a sample to get detailed revealment of china ' s current aged security in rural communities where people once lived closely around their clan. most southern part of anhui once belonged to huizhou, a historical area with tight clan domination and a strong tradition to support old family members. taking the mountain village zhaitan located in jixi, one southern county of anhui, as a specific research example, the author tries to give a detailed analysis and description of the changing process of the family support pattern accompanied by conflicts and current possible policies to choose in rural communities of similar traditional background
並以具有相同社區文化傳統，同時可耕地少、勞動力轉移程度較高、村民較為富裕的績溪宅坦古村社區為具體剖析個案，在借鑒已有相關研究成果的基礎上，主要運用人類學、現象學社會學的日常生活分析法和政治學的焦點事件分析法，詳細揭示皖南山區農村家庭養老模式的變遷過程及這一過程中的矛盾、沖突以及現階段所面臨的新選擇，並在尊重社區傳統的基礎上，就整合與建構現階段皖南山區宗族聚居農村社區新型家庭養老模式，提出自己的見解和對策。Types and dimensions of prefocus caps
預聚焦式燈頭的型式和尺寸Concentrating solar power plants produce electric power by converting the sun ' s energy into high - temperature heat using various mirror configurations
聚焦式太陽能電站發電，是通過各種面型的反射鏡，將太陽能轉化成高溫熱。We also propose two models to describe the propagation charcteristic of the focused hollow beam in 3d free space : one is the modified tem _ ( 01 ) mode doughnut beam model, the other is the width and narrow gaussian beam model
同時我們還提出了兩種聚焦中空光束的理論模型，一種是修改的tem _ （ 01 ）模式的doughnut光束模型，另一種是寬、窄高斯光束模型。During the research, we found the loss of auto - port tools is one of the reasons of developing unefficiently. so we focuse on the portability of the embedded system ' s developing platform and realise an auto - porting software
最後課題聚焦于嵌入式開發平臺的可移植性問題，實現了源代碼自動移植器的一個原型；在提高嵌入式系統開發過程的自動化方面進行了有益的實踐。分享友人