預先篩分 的英文怎麼說

中文拼音 [yùxiānshāifēn]
預先篩分 英文
prescreening
  • 預 : Ⅰ副詞（預先; 事先） in advance; beforehand Ⅱ動詞（參與） take part in
  • 先 : 名詞1 （時間或次序在前的） earlier; before; first; in advance 2 （祖先; 上代） elder generation; ...
  • 篩 : 名詞[書面語] （植物名） sedge
  • 分 : 分Ⅰ名詞1. （成分） component 2. （職責和權利的限度） what is within one's duty or rights Ⅱ同 「份」Ⅲ動詞[書面語] （料想） judge
  • 預先 : in advance; beforehand
  1. At first, this paper analyzes the factors of water - sand influencing water level of yellow river and the feasibility just using the factors of water - sand to study water level, and collects the corresponding data ; secondly, because there are strong nonlinear relation in the corresponding data, by meticulous theory analysis, this paper integrates basic nonlinear analysis method, theory of random analysis, method of least squares and so on. it puts forward a method which can get the high accuracy simulation of the data, perfects the multi - factor analysis of variable ( over three factors ) of the statistic ; thirdly, it applies the method to the approximation of corresponding water level process which belong to the capacity of sand of middle - high and middle - low, and get the high - accuracy simulation about the typical nonlinear relation ; at last, this paper definitudes the main influence mode that the capacity of sand. it mainly unite with other factors to work on the water level in the yellow river lower reaches ; mor eover, this paper analyzes the difficult point and the direction of improvement to realize the accuracy forecasting of the flood level of erodible - bed channel

    首先，系統分析了影響黃河水位的水沙因素，及僅用水沙因素有效研究水位的可行性，並按變量對應思想採集它們的相應數據；其次，由於相應水位過程數據中含極強的非線性關系，本論文經細致的理論分析，將基本的非線性分析方法、統計建模方法、隨機分析理論、最小均方誤差原則等等數學理論及方法有機揉合，提出了能有效實現這類數據高精度擬合的分層篩選法，並改進了統計學中多因子（三個以上）方差分析法；再次，將這一方法用於黃河中高及中低含沙類洪水相應水位過程的擬合，實現了這一典型非線性關系的高精度擬合，各年汛期上下游相應洪水位過程的擬合誤差都較小；最後，明確黃河下游含沙量對水位的主要影響方式，即含沙量主要是與其它因素聯合對水位作用；另外分析了要實現變動河床洪水位過程準確預報的困難所在及改進方向。
  2. Secondly, introducing the image analyzing technology with reference to the disadvantages of the traditional ferr - graph analysis technology, and with the combination of characteristic parameter optimizing filtration so as to raise a description method of debris micro - morphologic character. thirdly, with the application of mode recognition method, completing the process of debris auto - recognition based on the collected information of the debris configuration characteristics ; and conducting the diagnosis on the aero - engine wear faults according to the theory of particle tribology. fourthly, introducing information fusion technology to solve the problem that a single method can not collect enough fault premonitory information to conduct the wear fault diagnosis, hence to conduct the research and exploration in the field of comprehensive diagnosis on the aero - engine ' s multi - fault premonitory information

    本文的研究工作主要包括以下五個部分：首先，介紹航空發動機常見的磨損故障類型，研究磨損故障的失效機理，分析磨粒的產生機理、分類以及形態特徵：其次，針對傳統鐵譜分析技術的缺點，引入圖像分析技術，再結合特徵參數優化篩選，形成基於圖像的磨粒顯微形態學特徵描述方法：然後，基於提取到的磨粒形態特徵信息，應用模式識別方法完成磨粒自動識別，並根據顆粒摩擦學的基本原理進行航空發動機磨損故障的診斷與定位：再后，鑒于單一方法不能提取足夠的故障徵兆信息進行磨損故障診斷，本文引入信息融合技術，開展航空發動機多故障徵兆信息綜合診斷方法的研究與探索；最後，基於航空發動機滑油光譜分析與鐵譜分析數據，應用時序模型、灰色模型以及組合模型進行磨損故障的預測方法研究。
  3. A total of 168 strains of actinomycetes, of which 23, or 13. 7 %, displaying antitumor activity, was isolated from near - shore marine samples collected at wenchang mangrove, danzhou harbor and yanpu harbor, three isolation methods were employed, which are sds pretreatment, phenol pretreatment, heating pretreatment and potassium dichronate selection culture, and various media were used

    先後從文昌紅樹林、儋州港以及洋浦港採集樣品，採用苯酚、 sds 、加熱三種樣品預處理法和添加重鉻酸鉀的選擇培養法，並選用多種培養基對這些樣品進行了具有抗腫瘤活性海洋放線菌的分離篩選。共分離到168株放線菌，其中23株具有較強的抗腫瘤活性。
  4. To ensure the security of drinking water, pollution control on organic toxicants has become one of the major aspects in present environmental protection. started from the pollution status of organic toxicants along yangste river in jiangsu provinces, the sifting method of priority organic toxicants are present and applied, some suggestions of pre - warning system of prior control organic toxicants are listed in this paper

    長江（江蘇段）的有機毒物污染控制對于保障飲用水安全具有十分重要的意義，通過對長江（江蘇段）有機毒物污染和沿岸污染源現狀的分析，提出並舉例說明篩選優先控制有機毒物的方法，並對建設江蘇沿江優先控制有機毒物污染的預警體系提出了建議。
  5. Aims at application, we mainly discuss face detection in two circumstance. ( 1 ) in the gray image, we use difference image in multi - frames, then get the edge of the face, we make the raw - location to ensure the approximate position of the face, next, we use the template of the face to occlude the pseudo face region and get the region which near the exact face region. ( 2 ) use method of two template matching, first, we get the face template from many face average, second, we copy the eye section of the face template then get the eye template

    文中首先介紹了圖像預處理的各種方法，重點介紹了圖像分割和人臉檢測定位，針對實際應用的要求，著重處理了兩種情況的人像檢測定位： （ 1 ）在灰度圖像下對連續輸入的多幀進行差分，對于得到的邊緣進行處理初步確定人像的大概位置，然後採用模板匹配進行精確定位。 （ 2 ）應用雙模板匹配的方法，由多人臉平均得到人臉模板和眼睛模板，在檢測中採取了首先使用尺度相對較小的雙眼模板搜索候選人臉，再用人臉模板匹配進一步篩選候選人臉的方法。
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