threshold operation 中文意思是什麼
threshold operation
解釋
閾運算-
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 principle advantages of vcsels over conventional edge - emitting lasers lie in ultralow threshold current, small far - field divergent angle, high modulation frequency, potential for wafer level testing and the ease for single longitudinal mode operation and two - dimension integration. as a result they show considerable promise for applications such as optical fiber communication, parallel optical interconnects, optical information processing and neural networks, etc. a direct coupling theoretical model in quasi - three - dimension for the gain - wave guide vertical - cavity surface - emitting lasers has been created in this paper
它與傳統的邊發射激光器相比具有更優越的特性，例如，具有極低的閾值、較小的遠場發散角、調制頻率高、易實現單縱模工作和二維集成，無須解理封裝即可進行在片測試等，所以，它被廣泛應用於光纖通訊、并行光互聯、光信息處理、光神經網路等領域。 -
A statistical method is used to obtain the background model, which is updated real time in order to adapt to illumination changes and scene changes. after threshold operation, morphologic operation and connected region area measurement are introduced to solve background disturb problem. at last, shadows are detected using hsv color space information and gets exact moving regions
該方法首先利用統計的方法得到背景模型，並實時地對背景模型進行更新，以適應外界光線變化和場景本身的變化，閾值操作后，用形態學和連通域檢測的方法進行后處理，消除噪聲和背景擾動帶來的影響，最後，在hsv顏色空間下檢測出陰影，得到準確的運動對象區域。 -
Ti ? the voltage level at a transition - operated input that causes operation of the logic element according to specification, as the input voltage falls from a level above the positive - going threshold voltage, vt +
輸入電壓從正向門限電壓以上的電平vt ?開始下降，躍變后的輸入電平使得邏輯元素（單元）按照規范完成工作。 -
Ti ? the voltage level at a transition - operated input that causes operation of the logic element, according to specification, as the input voltage rises from a level below the negative - going threshold voltage, vt ?
輸入電壓從負向門限電壓以下的電平vt ?開始上升，躍變后的輸入電平使得邏輯元素（單元）按照規范完成工作。 -
Confirm the way to supply and storage the solar and wind energy, and confirm the scheme of the system ; three kinds of operation ways in the system have been analysed, then corresponding mathematics model has been set up ; finally figure out the solar energy radiate threshold value
根據確定太陽能和風能的供能、儲能方式，確定系統總體方案;對系統的三種運行方式進行了分析，並建立相應的數學模型;計算出系統控制的太陽能輻射閾值。 -
Firstly, the paper introduces the development and application of computer graphics & image technique, discusses the principle and method of cg and digital image processing, such as matrix of the graphic transformation, homogeneous reference frame, sampling and quantization of the image, file format of the image, template operation, etc. secondly the paper introduces the purpose and method of image enhancement processing, explains the each occasion of those methods such as threshold transformation, smoothing processing, sharpening processing, analyzes and contrasts the processing results of object image. thirdly, the paper introduces the method of mathematics morphologic, edge detection and thinning processing, attains character description of image and character dots of the contour. fourthly, the paper processes the coordinate transformation to character dots and basic splines fitting, imports correlative condition to devise meshing line and meshing track
本文首先介紹了計算機圖形圖像技術的發展與應用情況，對計算機圖形學和數字圖像處理的一些基本理論和方法如圖形變換矩陣、齊次坐標系、圖像采樣和量化、圖像文件格式、模板操作等內容進行了討論：然後對圖像增強處理的目的和方法進行了介紹，對諸如閥值變換、平滑處理、銳化處理等方法的應用場合進行了說明，並對實物圖像的處理結果進行了分析與比較；接下來介紹了數學形態學方法、對增強后的圖像進行邊緣檢測的方法和圖像的特徵描述方法，並獲取輪廓的特徵點：隨后對獲取的特徵點進行坐標變換，並進行b樣條曲線擬合，引入相關條件生成齒輪副的嚙合線及嚙合軌跡：最後引入等值線和區域填充表示方法，並以等值線和區域填充的形式對弧齒錐齒輪嚙合模擬的載荷分佈情況進行了直觀的表示。 -
Compared with the traditional detective methodes based on frame difference, the operation of the method is more less. because the threshold based on noise characteristic parameters is adaptive produced, algorithmic adaptability is better
與傳統的基於像素的幀間差分法相比，運算量較小。根據相對噪聲的特徵參數所估計的相對噪聲的閾值是在檢測過程中自適應生成的，適用性較強。 -
The switch power will operate at ccm condition when circuit is set to pwm mode. when pfm mode is selected for the operation mode, the switch power will still operate at pwm condition with the high load, the system will cancel the pwm mode and enter the pfm mode only when the load is drop to a certain threshold to boost the operation efficiency at light load, make the ic has high efficiency within wide load range
選擇pwm模式，開關電源將工作在ccm模式下;選擇pfm模式，在負載較高的情況下，開關電源仍然工作于pwm模式，只有當負載降低到一定程度時，開關電源才退出pwm模式，而按照pfm工作模式操作，跨過一部分時鐘周期，降低頻率相關功耗，以提高輕負載時低效率的問題，使得開關電源在很寬的負載范圍內都具有高效率。 -
Above - threshold operation method
超閾值運轉法激光器 -
First point is about the problems that private enterprises meet in self - development, including structural conflict of their products, non - standard management, lack of talent and experience in the field of foreign trade, low technical content in products, and hardness to get needed information etc. many private enterprises adopt the behavior of pursuing benefit of short period as export with low price, serve with shoddy tort and so on, all those may disturb the export market and lash the normal trading order. the last one is the restriction factor of external operation environment. as the entrance threshold of foreign trade field is high, resonance like professional association does not play a deserved role, the export encouragement policy of government is unsuitable, the land resource has become increasingly intense, and problems still exist in formulating and implementing of p artial laws and regulations
首先是民營企業在自身發展中遇到的問題，包括結構性矛盾突出、經營管理不規范、外貿的人才和經驗匱乏、技術水平落後、難以獲得所需信息等，不僅制約了企業自身的發展，也對正常的外貿經營秩序造成了沖擊；其次是外部經營環境的制約因素，如外貿領域的準入門檻較高、行業協會等中介組織沒有發揮應有的作用、政府的出口鼓勵措施政策不當、土地資源日益緊張、部分法律法規的制訂和實施存在問題。 -
Background subtraction is a commonly used moving objects detection method, it subtracts the background model which is stored beforehand or observed in time from the current frame, by threshold operation getting moving objects
減背景技術是一種常用的運動對象檢測方法，其基本思想是將視頻中當前幀圖象與事先存儲的或實時得到的背景模型相減，通過閾值操作，得出運動區域。
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