閾值傳輸 的英文怎麼說
中文拼音 [yùzhízhuànshū]
閾值傳輸
英文
threshold transmission-
The effects of air ' s absorption of heat, scatter, turbulent and thermal blooming on the laser beam transmitting under the air breakdown threshold value are analysed when laser transmit in the air and the result can be used designing of the laser system
摘要系統分析了激光在大氣中傳輸時在擊穿閾值以內，由於大氣汽溶膠的吸收、散射、大氣湍流、大氣熱暈等線性非線性問題對光束控制系統的影響，為激光系統提供指導。The improvement on selection of cluster head : considering the remaining power and power consumption in transmission of candidate cluster heads, the valve value is adjusted and a new cluster head selection mechanism is adopted
簇頭選擇演算法的改進:通過考慮候選簇頭節點的剩餘能量水平和它們傳輸時的能量消耗，對leach中的閾值t （ n ）進行調整。從而採用新的簇頭選擇機制。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 。Especially in high power laser applications, absorption can cause thermal distortion to optical components, then change the transmission characteristics of the incident beam, and also lower the laser induced damage thresholds ( lidt )
尤其在高功率激光作用下，吸收損耗不僅會引起光學薄膜元件的熱畸變，影響激光傳輸特性，還會降低薄膜的損傷閾值。The core of floating threshold value system is the data sampling technology. we will introduce the key chip - tlc5540 and tlc5615 and utilize mcs51 to control the whole system in the article. it examines the original signal from the hgcdte sensor and realizes the control of floating threshold value
浮動閾值系統的核心是數據採集技術，文中介紹了核心晶元tlc5540和tlc5615 ，利用mcs51單片機控制整個系統，對hgcdte傳感器輸出的原始信號進行檢測，實現了智能浮動閾值控制；同時闡述了性能先進的核心晶元? ? ad603及其應用於agc放大器的特殊性。In this paper, some investigation and design as following. have been carried out on er - yb codoped phosphate glass waveguide laser first, three primary performance parameters of er - yb waveguide laser pump threshold power ; output power and slope efficiency have been commulated and analysed theoretically based on er ~ ( 3 + ) - yb ~ ( 3 + ) energy configuration ; rate equation of stable state and transmitting equation. the influences of er - yb ions concentration ; enabled waveguide length ; light dot radius of signal light and pump light ; reflectivity of output lens on three above parameters have been researched
首先，從er ~ （ 3 + ） - yb ~ （ 3 + ）能級結構出發，結合激光穩態速率方程與傳輸方程，對鉺鐿波導激光器的三個主要性能參數:閾值功率、輸出功率、斜率效率作了理論計算分析，並研究了鉺、鐿離子濃度、光波導激活長度、信號光與泵浦光光斑半徑比例、輸出耦合鏡反射率對這三個關鍵性能參數的影響。A dfdl model including gain saturation effects is developed and this model is used to study the fluctuation of the pulse width theoretically, which is identical to the experiments. in order for ps pulse amplification, the saturation fluence for krf at 10 ps and gain of the discharge krf laser are monitored. 4
開展了10pskrf激光在空氣中的傳輸實驗研究，計算了自導引區內的閾值光強，觀測到光束自聚焦和自導引現象，測量了自導引區域內的等離子體密度，並對激光脈沖的傳輸演化進行了分析。A new image sampling method and a device for transmission flow measuring are provided, and an edge detection method based on the semantic weight and threshold selection tactics based on the vision model are used to extract the contour, calculate the area and volume within a short time span
設計了一種新型的用於傳輸流量檢測的圖像採集方法和裝置，並利用基於語義權值的邊緣提取方法和基於視覺模型的閾值選擇策略進行傳輸帶上物質的截面輪廓線提取，計算物質截面面積和較短時間內的流量體積。In conventional cmos charge pump circuits, the pumping high voltage is limited by mos threshold voltage, so that it can not use less cascade stages to pull up a high voltage which we want to generate
在傳統的cmos電荷泵電路中，電荷泵輸出的電壓受mos管的閾值電壓限制，所以當要求電荷泵的輸出電壓較高時，則不得不連很多階來達到要求。For solid - core optical fibers, great endeavor has been made and several kinds of fibers have been obtained. but the following research indicates that traditional solid - core structure has some deadly disadvantages : one is large reflective loss in input ends because of large reflective index of the solid core ; the other is low transmission threshold because of the structure disfigurements of solid - core. so their performances are far from th e applied requirements
紅外實芯光纖的研究已經深入開展了很久，也開發了一系列樣品，但后來的實驗研究證明，傳統的實芯光纖結構存在著很大的缺點：一是芯層材料的折射率比較大，因而耦合時光纖端面的反射損失比較大；二是實芯結構所存在的結構缺陷大大降低了光纖的能量傳輸閾值，所以其性能還遠不能達到應用的要求。Finally, the article uses the testing device get the quantitative signals of mixed gas. with which the article train the artificial network and test the net by the theory of artificial network. and the result shows that the net can fulfill our requirements
接著利用實驗裝置，採集了傳感器陣列的定量輸出信號，根據bp神經網路的相關理論，利用樣本信號對網路進行了訓練和驗證，結果基本滿足要求;隨后根據網路各層的權值和閾值，將網路移植到單片機中。分享友人