空間變率 的英文怎麼說

中文拼音 [kōngjiānbiànlǜ]
空間變率 英文
space rate of change
  • 空 : 空Ⅰ形容詞（不包含什麼; 裏面沒有東西或沒有內容; 不切實際的） empty; hollow; void Ⅱ名詞1 （天空） s...
  • 間 : 間Ⅰ名詞1 （中間） between; among 2 （一定的空間或時間里） with a definite time or space 3 （一間...
  • 率 : 率名詞（比值） rate; ratio; proportion
  • 空間 : space; enclosure; room; blank; interspace
  1. At first some modification is made in conventional beam forming of frequency domain, namely to estimate doa by arrays outputs on compensated spacial frequency points of echoes. then the cwt is utilized to signal processing in space - frequency domain for estimation of doa, and the corresponding modification is also made. in the dissertation, the computer simulations of doa estimation for both narrow - band and wide - band echoes are given, so do the necessary comparison among several methods and crb

    首先在傳統的頻域波束形成演算法的基礎上，提出對寬帶信號的頻率補償，也即對寬帶回波信號的各空間頻率根據時間頻率的差異進行相應補償，然後對各陣元輸出求和來得到方位估計；其次將連續小波變換引入到空間?頻率處理中，從而完成對目標方位的估計，並進行了相應地補償。
  2. In section 4, by making use of the fourier transformation for spatial variables and starting from the nonparaxial propagating equation of ultrashort pulsed beam in temporal frequency domain, the nonparaxial solution basing on the paraxial propagating solution was derived, which come to exact solution by iterative of the paraxial integral solution

    在第四節里，通過採用空間變量的傅立葉變換和利用時間頻率域下的非傍軸傳輸方程，我們得出了超短脈沖光束傳輸的非傍軸的修正方法。
  3. 2. defining the entropy space of image and entropy difference, the concept of information entropy is applied to image retrieval. some mathematical properties of entropy are studied, and similarity measurement of image entropy and corresponding algorithm is presented. these techniques can reduce the dimensionality of histogram space from n to l ( n > l ), increase the image retrieval efficiency, and improve the capability of image retrieval system

    將信息論中的信息熵概念引入圖象檢索，定義了圖象墑空間、熵差的概念，研究了圖象熵的性質，探討了基於圖象熵的相似性度量方法和實現演算法，該方法可將n維直方圖空間變為1維，提高了圖象檢索的效率，改善了圖象檢索系統的性能。
  4. To demonstrate the heterogeneity of hydrological flux and the significant influence on regional evaporation, firstly, it is proved theoretically that because of soil water content ' s horizontal spatial variability ( heterogeneous distribution ) an additional heterogeneous disturbance which is equivalent to mesoscale flux is induced

    首先從理論上推證出：由於土壤水分所存在的水平空間變率（非均勻分佈，對網格區平均通量而言，可引發附加的量級與中尺度通量相當的非均勻擾動項。
  5. Numerical experiment shows that this heterogeneous disturbance arising from soil water content ' s spatial variability cannot be neglected when regional mean evaporation fluxis estimated

    數值試驗表明，這種因空間變率而引發的非均勻擾動項在估計區域平均通量時具有不可忽視的影響。
  6. In this paper, starting with the physical mechanics of land surface hydrologic process and the introduction of the theory in probability statistic distribution, an analytical expression of heterogeneous evapotranspiration efficiency is given which takes heterogeneous soil water content ' s subgrid scale spatial variability into account, through which the parameterization scheme of subgrid scale soil surface ' s evapotranspiration efficiency ( which is generally called mosaic method ) is modified to a statistic - dynamic scheme in which a whole heterogeneity of the grid region is considered

    本文從陸面水文過程的物理機制出發，引進概率統計分佈理論，推導出一種由非均勻土壤含水量次網格尺度空間變率所形成的非均勻蒸發散率解析表達式，從而將通常的次網格尺度地表蒸散率的參數化方案（ mosaic方法） ，改進為考慮網格區整體非均勻性的統計-動力參數化方案。
  7. Synthetic aperture radiometer applies the interferometric principle to sample in the spatial frequency domain and retrieves the image by fourier or other numerical transformation

    綜合孔徑輻射計利用孔徑綜合原理在空間頻率域中采樣，通過傅立葉變換或其他數學變換獲取反演亮溫圖像。
  8. Spatial variation of steady water infiltration rates of small watershed in hilly and gully loess region

    黃土丘陵區小流域土壤穩定入滲速率空間變異
  9. It shows that a disadvantag ekists when a crsi is used to measure a step structure in a wavefront, but it is useful to adjust a crsi system with lcslm. 4. according to the didriction effect of an aperture, the spatial resolution of our crsi was analyzed and the transform function of our crsi was calibrated by using the psd method of a step wavefront. and some factors which are associated with the accuracy of our crsi were analyzed too

    四、從光學系統衍射效應的角度分析了本文建立的環路徑向剪切干涉儀的空間解析度，並利用波前功率譜密度的概念對該干涉儀的空間頻率響應特性進行了標定，分析了限制該干涉儀測量精度的主要因素以及徑向剪切比與測量精度的關系，並指出了該干涉儀的測量范圍，結果顯示該干涉儀基本上可用於準確測量中低頻段的波前畸變。
  10. A widely used method for checking real - time systems is, according to the real - time property to be checked, to use a proper bi - simulation equivalence relation to convert the infinite - timed state space to a finite equivalence class space. the algorithm needs only to explore the finite space to get a correct answer. in most cases, exhaustive exploration is very difficult because the equivalence class space increases explosively when the scale of the system increases. in this paper, an equivalence relation is introduced to check whether a concurrent system, which is composed of a finite set of real - time automata, satisfies a linear duration property. to avoid exhaustive exploration, this paper also introduces a compatibility relation between timed states ( configurations ). based on these two relations, an algorithm is proposed to check whether a real - time automaton network satisfies a linear duration property. the cases study shows that under some conditions this algorithm has better efficiency than the tools in the literature

    一個被廣泛用於驗證實時系統的方法是根據被驗證的實時性質，使用適當的雙向模擬等價關系使無限的狀態空間轉化為有限的狀態等價類空間.演算法只需要在這個有限的等價類空間里搜索就可以得到正確答案.但是，這個等價類空間的規模一般隨著系統規模的增大而產生爆炸性的增長，以至於在很多情況下，窮盡搜索這個空間是不現實的.該文引入了一個等價關系來驗證一個由多個實時自動機通過共享變量組成的並發系統是否滿足一個線性時段特性.同時，還引入了格局之間的兼容關系來避免對狀態等價類空間的窮盡搜索.基於這兩個關系，文章提出了一個演算法來驗證是否一個實時自動機網滿足一個線性時段特性.實例研究顯示，此演算法在某些情況下比其他一些工具有更好的時間和空間效率
  11. With the characteristics of large ambient noise, very narrow bandwidth, low carrier frequency, great propagation latency and time - space - frequency variant multipath effect ( mpe ), the stochastic ocean channel has demonstrated the greatest complexity and difficulty for underwater acoustic wireless communications. among them multipath effect ( mpe ) is the most difficult obstacle that results in signal fading and inter - symbol interference ( isi )

    但是噪聲高、帶寬窄、載波頻率低、傳輸時延大、多途徑效應隨時間?空間?頻率變化等通道特性都會給有效、可靠的水聲通信帶來很大的麻煩，其中多途徑效應是最主要的困擾因素，它會導致信號幅度衰落和碼間干擾。
  12. The results also indicate that, in a piece of gain medium, the cutoff frequency, " the most quickly growing frequency " and the integral exponential gain are variables of the beam intensity, medium gain coefficient and propagation distance

    在考慮了介質的增益后，截止空間頻率、最快增長頻率以及最大增長因子不再像原始b - t理論中那樣保持不變，它成了和光強、介質增益系數及傳播距離有關的一個量。
  13. Based on the nonlinear paraxial equation and b - t theory, a differential equation, which describes the small - scale self - focusing in gain ( loss ) media has been derived. the change rule of the maximal gain frequency, cutoff frequency and integral exponential gain have been analyzed approximately

    我們首先從非線性近軸波方程出發，基於b - t理論的思想，在考慮了介質的增益（損耗）特性的情況下，推導得出了小尺度自聚焦所滿足的微分方程，並通過近似方法分析了最大增長頻率、截止空間頻率及積分指數增益等的變化規律。
  14. Computer simulation results show that the beamspace wsf algorithm retains the super performance of its element space counterpart when applied to the beam outputs of some practical acoustic - receiving array. 3. an improved form of classical time domain broadband beamforming is proposed by combining digital delay lines and fir filters

    提出了對經典時域寬帶波束形成器的改進方法，採用數字延遲線和fir數字濾波器結合的方式實現時域波束形成，以消除波束畸變並實時實現結構特殊的空間頻率響應。
  15. Spatial variability of regional water requirement and water deficient ratio

    區域需水量和缺水率的空間變異性
  16. ( 4 ) designed an image authentication method of semi - fragile watermarking technique based on dwt. we transform the image into wavelet domain and group the four adjacent wavelet coefficients

    （ 4 ）由於小波變換具有良好的空間?頻率局部特性以及與人眼視覺特性相符的變換機制，在新一代靜止圖像壓縮標準（ jpeg2000 ）和運動圖像壓縮標準mpeg - 4中占據了重要位置。
  17. In order to effectively solve the problem of monitoring time - space changes of soil moisture in large - scale regions, according to the conclusion of soil moisture retrievingby passive microwave remote sensing, a methodology of the soil surface emissivity was proposed by model bsm based on amsr - e microwave remote sensing data, proof of the relationship between surface soil moisture and surface emissivity

    摘要為了有效解決大尺度區域土壤水分時、空間變化監測問題，在總結了被動微波遙感反演土壤濕度規律的基礎上，基於先進的amsr - e星載被動微波遙感數據，提出了利用雙譜模型計算土壤表面發射率的計算方法。
  18. Abstract : influences of the changes of the amplitude and space frequenc y of road surface roughness on adhesion ability are simulated and analyzed by me ans of the nonlinear and time - varying tyer model made by the author

    文摘:採用作者建立的非線性時變輪胎模型，模擬分析了路面不平度幅值及路面空間頻率變化對地面附著性能的影響。
  19. The law of permeability changes of different frequency range was studied during the wire rope fatigue test

    研究了鋼絲繩彎曲疲勞歷程中，磁導率在不同空間頻率區間的變化規律。
  20. Among which, mathematical model is both the best carrier that represents mathematics " solutions to practical problems and mathematical thinking processes and the bridge for the integration of mathematical education theory with practice ; fractal geometry enables students to have better understanding of the new development of geometry and exploit new space of geometric thinking ; probability and statistics, by means of the collection, coordination, description and analysis of data as well as the portrayal of the possibility of uncertain phenomena and events, provide evidences and suggestions for people ' s better decision - making, which is essential to people ' s life

    分形幾何學使得學生能更多地了解幾何學的新發展，開拓幾何思維的新空間。概率與統計則通過對數據的收集、整理、描述和分析以及對不確定現象和事件發生可能性的刻畫，為人們更好地制定決策提供依據和建議。研究過程中，就課程的整合作了大量針對性、操作性強的教育教學案例，對轉變學生的學習方式，促進師生、學生間的交流與合作，培養學生創造性思維和實踐能力有一定的指導作用。
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