density step 中文意思是什麼

density step 解釋
密度級
  • density : n. 1. 稠密；濃厚。2. 【物理學】濃度；密度；比重。3. 愚鈍，昏庸。
  • step : vi （ pp ）1 走；跨步。2 踩，踏上 （on）。3 跳舞，輕快地走，合著步調走。4 跨入，踏進。5 走上。vt ...
  1. When the density step wedge has been properly exposed, the film is then processed.

    當密度階梯光楔被正確曝光后，即把膠片沖洗出來。
  2. A systematic summary of previous work has been given first. then this paper presents a novel multi - stage face detection algorithm, which makes a good use of human face pattern ' s valuable information in colour image sequences. the difficult detection task has been divided into four steps : the preprocessing, which is to gain skin colored regions with human skin color model ; the roughly detection and face region refining by elliptic curve fitting ; the fine detection with facial features " detection and location ; the face / non - face classification step based on pca and gaussian density estimation technique

    本文對彩色序列圖像中的人臉檢測和跟蹤技術進行了深入的研究，其具體內容為：對近年來的研究工作進行了系統的介紹；提出了一個由粗到細的多階段的人臉檢測演算法，該演算法充分利用了序列圖像中人臉模式的各種有用信息，將復雜的檢測工作分為了四個部分：膚色區域分割預處理，人臉粗檢及利用橢圓擬和的人臉區域提煉，應用人臉基本特徵檢測和定位的人臉細檢， pca結合高斯概率密度估計的人臉驗證。
  3. Then, the effect of heavily doped boron on ig of czochralski silicon was also investigated. it is found that no dz ( denuded zones ) were observed in the hb samples subjected to high one - step temperature, ramping annealing respectively. for conventional high - low - high three - step ig annealing, the dz becomes narrower and bmd density is higher in hb samples than that in lb samples, as a result of hb enhancing oxygen precipitation

    結果顯示，單步高溫熱處理時重摻硼樣品不能形成潔凈區；降溫退火中，降溫速度較為緩慢（ 3 / min ）時能生成一定量的氧沉澱，但沒有潔凈區形成；普通高?低?高三步熱處理過程中，形成明顯的潔凈區，但相對輕摻樣品而言，潔凈區較窄，氧沉澱密度明顯偏高，說明重摻硼樣品吸雜能力強。
  4. From the viewpoint of macro dynamic characteristics of freeway traffic flow, this paper classifies the freeway, gives a nonlinear macro dynamic traffic flow model of freeway using density and speed as state variables and then identifies the parameters by using searching approach step by step, finally gives an identification instance

    摘要從高速公路交通流的宏觀特性和動態特性出發，對高速公路進行了兩級分段，以車流密度和車流速度作為狀態變量，給出了高速公路非線性的宏觀動態交通流模型，進而採用直接搜索法對模型中的參數進行了分段辨識，並給出了辨識實例。
  5. Compared with the existing rp methods using high energy density beams, the hpdm method solved the key problems of insufficient dimensional precision and surface quality caused by the step effect and no - supporting, and puts forward a new way to directly manufacture the difficult - to - machining materials parts with short - routine, low - cost and high quality

    該技術解決了現有高能束熔積成形技術因無支撐和臺階效應造成的尺寸精度和表面質量不高的瓶頸問題，是難加工材料零件短流程、低成本、高質量無模精確製造的新的有效加工方法。
  6. The in - plane equivalent elastic modulus and tensile strength of stitched composite laminates are studied, and it ' s found that the in - plane equivalent elastic modulus decreases with the increase of stitch density, stitch thread diameter, maximal misalignment angle and the distortion width, and the range is about 5 %. the tensile strength of stitched composite laminate increases with the increase of stitch step and decreases with the stitch space. the

    研究結果表明：隨著縫紉密度、縫紉線直徑、最大纖維偏轉角和縫紉變形區寬度的增加，縫紉復合材料層合板面內等效模量逐漸降低，最大降幅一般在5 %左右；縫紉復合材料層合板的拉伸強度隨縫紉針距的增加而增大，隨縫紉行距的增加而降低，因此縫紉密度對拉伸強度的影響程度要看具體的縫紉針距和行距。
  7. The boundaries had sufficient capacity to offer and hold the vehicles that moved in or out. the density of vehicles would tend to a certain stable value with the acceleration of time step, which could reflect that the urban traffic had appropriate capacity

    周邊有充分能力提供和接納出、入車輛，車輛密度將會隨著時間步的增多趨向某穩定值，以反映城市的交通存在某適宜的容量。
  8. The estimated genome length of f. chinensis is about 2000 cm, so the map covered the 47. 5 % and 35. 6 % of the genome. the map with moderate density developed here provides a first step in producing a saturated linkage map of f. chinensis and open the way for marker assisted selection, comparative genomics and gene location and clone

    遺傳連鎖圖譜的構建為分子標記輔助育種、比較基因組作圖、及基因定位與克隆奠定了基礎，並為今後其它海水養殖生物遺傳圖譜的構建提供了理論和實踐意義。本項研究填補了中國對蝦分子遺傳學與育種學領域的空白。
  9. Density step tablet

    密度分級片
  10. This paper enclose the mode and the density distribution property of the step - index optical fiber after plane wave coupled into it

    本文研究均勻平面波本經階躍光纖的傳播特性和輸出光強分佈特性。
  11. In the first step, the maximum capacity of the crane was entirely analyzed by applying concept of statistics density, mathematical model was established for the configuration of crane comprising the utilization coefficient of crane and wharf

    在對裝卸橋配置研究第一個層面，裝卸橋的最大配置展開進行詳細分析，採用數理統計方法引入密度概念，提出了裝卸橋與碼頭關系的「佔用第數」 ，建立配置數字模型。
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