縱模 的英文怎麼說

It is discoverde that with a looped feedback circuit, the dds acousto - optic mode locking has the function of tracking the frequency interval of the laser resonator longitudinal mode, and stabilizing the quality of the laser beams

Dds聲光鎖模器在增加閉環反饋環路后，可以跟蹤激光諧振腔縱模頻率間隔變化，穩定激光光束輸出質量。

Therefore, the frequency - stabilised double longitudinal modes with thermoregulation were adopted. this method was realised by winding wire with high electrical resistance on to the neck of laser tube. heating was controlled by self - organised fuzzy control method

為此，提出了增加有纏繞于激光管頸上的電阻絲輔助加熱控制環節的自四川大學博一l :學位論文組織模糊控制雙縱模熱穩頻方法。

The paper recites the development, current situation of the ship maneuvering simulator and advantage of the ship maneuvering simulator to demonstrate the designs of harbor and fairway, mainly analyzes the application prospect of the ship maneuvering simulator for the demonstration of the designs of harbor and fairway, which points out a direction for the application of our country " s ship maneuvering simulator. on top of it, author combining a material application example " simulation for assessing the navigation capacity of sutong changjiang road bridge " that author took part in to simulate personally, depicts the whole steps about applying the ship maneuvering simulator to demonstrate the designs of harbor and fairway, which proves the great advantage of the ship maneuvering simulator for the demonstration of the designs of harbor and fairway, then discusses the steps and ways about applying the ship maneuvering simulator to demonstrate the designs of harbor and fairway

本文從船舶操縱模擬器的發展、應用現狀著手，依託船舶操縱模擬器在港航設計論證上的應用優勢，重點論述了船舶操縱模擬器在我國港航設計論證上的應用前景，為我國的船舶操縱模擬器的應用研究指明了方向；緊接著結合作者參加的具體的港航論證項目「蘇通長江公路大橋船舶通航論證模擬」 ，敘述了運用船舶操縱模擬器進行港航設計論證的整個具體流程，用實例證明了運用船舶操縱模擬器進行港航設計論證的巨大優勢；在此基礎上，探討了運用船舶操縱模擬器進行港航設計論證的具體步驟與方法。

This thesis analyzes the development and application of vr technology and computer simulation technology all over the world, aims at meeting the specific requirements of the training of container bank crane operators ( cbc ) and other port crane operators in china, and presents to you design methods and plans as well as real operation examples of simulation systems for electric cbcs. furthermore, it even creates a tentative workable model of a lifting tackle for a cbc

本文在分析了虛擬現實技術和計算機模擬技術在國內外發展及應用情況的基礎上，結合岸邊集裝箱起重機和我國港口起重機司機培訓的具體要求，分析和提出了岸邊集裝箱起重機電控與操縱模擬系統的設計方法和設計方案，初步建立了集裝箱起重機小車?吊具系統的運動模型。

Vertical - cavity surface - emitting lasers ( vcsel ' s ) have distinct advantages over conventional edge emitting lasers, such as small divergence angle, single longitudinal mode operation and very low threshold current. they are especially suitable for making two - dimensional ( 2 - d ) arrays as well as vcsel ' s based integrate devices

垂直腔面發射半導體激光器（ vcsel ）與傳統的邊發射半導體激光器相比，它具有發散角小、單縱模工作、非常低的閾值電流等優點，尤其它適於二維面陣集成和與其它光電子器件集成。

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。

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 。

Chapter 8 simulates the ship maneuvering motion of turning and zigzag test and takes into account the effect of water depth on ship maneuverability by use of the maneuvering model group ( mmg ) of japan. the main aim is to satisfy the need such as developing the maneuvering simulator of freshwater, the dynamic demonstration of avoiding ship collisions

第8章選擇日本mmg的操縱運動數學模型對船舶作回轉運動、 z型操縱試驗的情況進行了數值模擬，並著重考慮了航道水深對船舶操縱性能的影響問題，其目的上要是為了課題組今後進一步開發諸如內河船舶操縱模擬器、船舶避碰計算機動態演示的需要。

There are many factors must be desided such as width ; depth ; ship ' s turning area ; ship ' s stop distance during the design of shanghai deep - water channel. very large container vessels. navigating at the channel with the affections certain wind, currents, seas and other influences, may cause more huge damage and expenditures for the accidents without safety operation. some date for channel design to very large container vessels has been gone beyond in " design code of general layout for sea port " and needs to replenish, modify. the purpose of this study is : to choice the ship form, mainly ship ' s overall size ; draft, according to design of shanghai deep - water port and development of container, then to get the date of width and depth of channel through simulator tests

對8000teu 、 5250teu超大型集裝箱船舶的航道寬度設計已超出了該規范的規定范疇，急需補充甚至修改。本課題研究的目的是根據洋山深水港設計規劃和集裝箱船舶的發展趨勢，通過研究、分析、比較，選擇最合適的船型，尤其是船舶主尺度和船舶吃水。在此基礎上，採用船舶操縱模擬器進行航行模擬研究，在大量模擬研究情況下，得出進港航道所需的航道寬度和深度。

The whole console comprises cpu module, serial port module, i / o port extension module, a / d module, d / a module, led display module and rudder input module, etc. during design and development of usb communication applied to console, characteristic and application of usb, general process of development of usb device have been mainly discussed, part work on hardware and software of usb communication have also been done

在實際開發工作中，按照單片機應用系統設計思想分階段進行各個子任務模塊的開發調試，然後對整個控制臺系統進行調試，使得該控制臺介面電路更好的應用於大型船舶操縱模擬器中。在控制臺實現usb通信的設計和開發過程中，主要深入研究了usb的結構特點， usb的應用以及usb設備的一般開發過程，對控制臺實現usb通信的硬體電路和軟體部分做了部分開發工作。

During the process of design and development of interface circuit, i mainly studied the design method of microcontroller application system, brought forward a set of scheme of it, and accomplished the development of interface circuit of large scale shiphandling simulator according to the scheme

在設計和開發控制臺介面電路系統的過程當中，主要深入研究了單片機應用系統的設計方法，提出了一整套單片機應用系統設計思想，並根據這一思想完成了大型船舶操縱模擬器介面電路系統的研製開發工作。

This article has systematically discussed structure and design of bridge console of large scale shiphandling simulator developed by the nautical science and technology institute of dalian maritime university, especially about its interface circuit, and part work of realization of usb communication in bridge console

本文系統地論述了大連海事大學航海技術研究所研製的大型船舶操縱模擬器控制臺介面電路系統的結構、設計與實現，以及控制臺實現usb通信的部分工作。

The reason for the differences in the spectral purity with regard to longitudinal mode content of the lasers is still not clear.

關于這種激光器中，造成縱模成分的純度有差別的原因，現在仍不清楚。

Lcl : longituchinal conrorsion loss

縱模變換損耗

Single longitudinal mode laser

單縱模激光器

The prerequisite of actively mode - locked fiber laser stable work is that the modulation signal frequency must be the integral multiple to the cavity resonance frequency

主動鎖模光纖激光器穩定工作的前提條件之一是調制信號頻率應為腔內縱模間隔的整數倍。

The laser give out 10. 7mw green light, pumped 900mw. we observed it for 40 hours, the noise of green power is lower than 1 %. we optimized the laser cavity later

激光器工作在相互平行的多縱模模式下，在900mw的泵浦輸入功率下得到倍頻光功率為10 . 7mw ， 40小時連續輸出光功率噪聲1 。

This paper introduces the development of fiber - optic mach - zehnder interferometer during measuring linewidth parameter of single - frequency lasers, and the experiment result has been given

摘要介紹了作者在測量單縱模激光器線寬參數的過程中，研製的馬赫曾德爾光纖干涉儀，並給出了實驗結果。

Two - segment distributed feedback ( dfb ) semiconductor lasers can achieve tuning with single longitudinal mode in a certain wavelength range ; at the same time, its superiority also includes bistablity and wavelength conversion

其中，兩段式分佈反饋（ distributedfeedback ， dfb ）半導體激光器可以在一定波長范圍內實現單縱模、可調諧工作；同時，它還具有雙穩、波長轉換等功能。

The subject mainly studies the splitting phenomena of laser longitudinal mode and the transmitted resonant mode of fabry - perot etalon using electrically controlled birefringence of liquid crystal, so as to find a new approach to obtain the dual - frequency laser output

本論文主要研究利用液晶的電控雙折射效應分裂nd ： yag激光縱模和f - p標準具諧振模，以尋求產生雙頻激光輸出的新途徑。