density background 中文意思是什麼

density background 解釋
背景密度
  • density : n. 1. 稠密；濃厚。2. 【物理學】濃度；密度；比重。3. 愚鈍，昏庸。
  • background : n 1 後景，背景；基本情況；（紡織品等的）底子；出身；經歷。2 隱蔽的[不引人注目的]地位；幕後。3 襯...
  1. The main achievements are as follows : the theory models of defect mfl field are set up ; based on the magnetic dipole model and finite element model, the distribution of defect mfl field is simulated in the dissertation ; the component of flux density ( magnetic filed ) parallel to the surface of pipe is detected by a circumferential array of hall probes ; the factors including defect geometry parameters, defect surface angle and shape, pipe material, field intensity, vehicle velocity, background magnetization, operating pressure and remanent magnetization and so on influence the mfl signal characteristics

    採用霍爾元件作為缺陷漏磁檢測傳感器，獲得管道軸截面漏磁場切向分量的漏磁信號；研究了缺陷外形尺寸、缺陷傾角和形狀、管道材質和磁化強度、檢測儀移動速度、管道背底磁場、管內壓力和剩磁對漏磁信號的影響。提出了各通道增益放大、各路漏磁信號偏離調整、波形微分、數字濾波和平滑等漏磁信號預處理方法；分析了等空間采樣的漏磁信號轉換為等時間采樣信號的必要性，研究了漏磁信號的小波去噪方法。
  2. 1. boron - doped diamond ( bdd ) electrodes have recently attracted considerable interest, especially for electrochemical analysis due to its outstanding characteristics : ( 1 ) very low background current density ; ( 2 ) a wide potential window in aqueous solution ; ( 3 ) good activity toward some redox analytes without any pretreatment ; ( 4 ) long term response stability

    1 .硼摻雜金剛石（ bdd ）電極具有較低的背景電流、無需作任何處理的情況下對一些氧化還原分析物有好的活性、高電化學穩定性、寬的電位窗口和長時間的響應穩定性等優點，研究了一些活性物質在bdd電極上的電化學性質。
  3. There is a strong inerse association between high - density lipoprotein ( hdl ) cholesterol ( the " good " cholesterol ) and risk of coronary atherosclerotic disease, according to background information in the article

    根據文章中的背景資料可知，高密度脂蛋白膽固醇是一種「好」的膽固醇，它與罹患冠狀動脈粥樣硬化的危險因素呈高度負相關。
  4. The background of phantom is the nacl solution with different density

    背景為不同濃度的naci溶液。
  5. Standard test method for evaluation of large area density and background on office copiers

    辦公室復印機大范圍濃度和底色評定用測試方法
  6. Under the background of target tracking in high - density clutter, the calculation formula of the pda algorithm ' s error variance is analyzed and revised firstly, and the modified pda ( mpda ) is derived, which not only improves the tracking performance, but also makes the error variance and the real error of the algorithm match well

    針對高密度雜波環境中的目標跟蹤問題，首先分析和修正了pda演算法中誤差方差的計算公式，提出了修正的pda演算法（ mpda ） ，它不僅提高了跟蹤性能，而且使得誤差方差與演算法的實際誤差能夠很好地匹配。
  7. 2. second, the investigation of wave propagation characteristic in periodically magnetized uniformity plasma is done, in light of numerical calculation, to analyze the effect of additional magnetic field amplitude, background magnetic field and plasma density changing on the propagation characteristic

    2 .對電磁波在周期磁化均勻等離子體中的傳播特性進行了研究，通過數值計算分析了不同外加磁場幅值，背景磁場以及不同等離子體密度對波傳播特性的影響
  8. 4. finally, the investigation of wave propagation characteristic in round waveguide filled uniformity plasma periodically magnetized is done, by numerical calculation, to analyze the effect on the propagation characteristic when additional magnetic field amplitude, background magnetic field and plasma density change

    4 .研究了電磁波在填充周期磁化均勻等離子體金屬圓波導中的傳輸特性，推導出該周期慢波結構的色散方程，通過數值計算，繪出了色散曲線圖
  9. The big bang model, which states that almost 14 billion years ago the universe started expanding from a state of extremely high density and temperature, is able to explain galaxy motions, the abundance of hydrogen and helium, and the properties of the cosmic microwave background ( cmb ), the remnant heat from the expanding and cooling gas

    大霹靂模型指出，宇宙于約140億年前自極度高溫、高密度的狀態開始擴張，這理論不但可以解釋星系運動以及宇宙中氫與氦的含量，而且還預測了宇宙擴張時，冷卻中氣體的殘餘熱輻射，也就是宇宙微波背景的各項性質。
  10. 3. in order to show the fact that the - licrowave modulates the background plasma density and the density grating influences the propagation of the microwave in return, the dispersion relation of the dielectric cerenkov maser filled with plasma grating is derived when the modulation parameter is varied

    三、為了反映等離子體被微波場調制從而形成密度周期性分佈的等離子體柵，反過來影響電磁波的傳播這一物理事實，在調制系數變化的情況下，從等離子體柵的等效模型出發，推導了等離子體柵填充的介質cerenkov脈塞的色散方程。
  11. Standard test method for evaluation of larger area density and background on electrophotographic printers

    評定電子照相印表機較大面積密度和底色的標準試驗方法
  12. In concerning with china ' s conditions, this paper researches into the urban spatial strategy based on landscape ecosystem that is under the background of the country ' s dense population and high - density 3 - dimentional culture : conserving and protecting city ecological districts, promoting the ecological landscape, building up and promoting a sustainable human spatial structure in the city

    在此背景下，該文試圖探討基於生態景觀系統的城市空間發展戰略研究的基本框架，力圖通過對城市斑塊的保護，維護城市生態景觀系統的完整性，構建完善、有機的自然和人工生態環境相結合的可持續的城市空間結構。
  13. ( 3 ) on the background of the development of an ignition rocket, some application investigations have been carried out. some parameters related to water - resistant ignition mixture, the charge of ignition rocket, such as heat - flow, density of charges, structure of charges, coating and its process, area ratio of nozzle and high temperature corrosion of the nozzle, were calculated and studied, respectively. on the basis of the above studies, an ignition rocket was successfully developed

    （ 3 ）進行了應用研究，以某系列點火發動機的研製為背景，分別對耐水點火藥用作點火發動機裝藥所涉及的能量衡算、裝藥密度、裝藥結構、包覆及其工藝、喉面比及噴口燒蝕等問題進行了分析和實驗研究，在這些研究的基礎上成功地製作了一種點火發動機。
  14. 3. more, the investigation of wave propagation characteristic in round waveguide filled periodically changeful plasma in density is done, by numerical calculation, to analyze the effect on the propagation characteristic when background plasma density and the amplitude of plasma density change

    3 .研究了電磁波在填充密度周期變化等離子體金屬圓波導中的傳輸特性，通過數值計算分些了不同等離子體密度和背景密度情況下對波的傳播特性的影響
  15. Using the feature : there exists distinct edge contour between the characters and the background in color image, we give a color image text extraction algorithm - tea ( text extraction algorithm ), which makes the use of cedo to process edge detection of color image, then, adopts morphologic dilation technology to form region image, and combines the area - growth algorithm to mark the candidate text blocks, finally, determinates the correct text block by analyzing the density of text block and the space frequency feature

    利用彩色圖像文本區域與背景之間存在明顯邊緣輪廓的特點，本文給出了彩色圖像文本提取演算法? tea （ textextractionalgorithm ） 。該演算法首先利用cedo進行彩色圖像邊緣檢測，然後採用形態學膨脹技術生成區域圖像，並結合區域生長演算法標記候選文本塊，最後通過分析文本塊密度和空間頻率特性來判定真正的文本塊，從而較好地完成了彩色圖像的文本提取。
  16. Based on the discovery practice on pingyang county, wenzhou city, this article suggests a " multi - stories, high - density " pattern which conforms to the reality of our nation ' s small towns and the market economy background

    本文在溫州市平陽縣舊城改造探索實踐的經驗基礎上，提出了「多層高密度」這樣一種符合我國小城鎮現狀和市場經濟背景的舊城改造模式。
  17. In this paper, the filiform corrosion images of aa6016 - t4 aluminum alloy beneath an epoxy coating were detected and picked out from the image background with digital image processing technique, and some parameters such as corrosion area density, corrosion propagating speed, and projective value of filiform corrosion vertical to the scratch, were calculated from the processed filiform corrosion image, which were probed to evaluate the propagating status of filiform corrosion effectively and reasonably

    摘要運用數字圖像處理技術檢測、提取了塗覆環氧樹脂的aa6016鋁合金絲狀腐蝕圖像，分析探討了由絲狀腐蝕圖像所得到的腐蝕面積密度、腐蝕擴展速度以及垂直於切口方向投影值等參數對評估絲狀腐蝕發展狀況的有效性及合理性。
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