散射體 的英文怎麼說
中文拼音 [sǎnshètǐ]
散射體
英文
diffuser-
The mett cross section applies to a point scatterer.
莫脫截面適用於點散射體。Calculation of the band structures in two - dimensional phononic crystals consisting of elliptic cylinders
二維橢圓柱散射體聲子晶體帶結構的計算Due to the importance of the accuracy of the time - domain impedance matrix elements, the techniques by which treating of the singular integrals and near singular integrals arose from the tdie - mom solving process are analyzed in detail, and these techniques are utilized to solve the tdie. in the end, using triangle patches discretizing arbitrarily 3 - d dielectric objects and metal - nonmetal composite objects surface and utilizing spatial rwg and temporal triangular bases, the tdie are solved by mot algorithm
最後，分別對三維介質目標、金屬非金屬組合目標散射體表面用三角貼片離散，並在空間上採用rwg基函數，在時間上採用三角型時間基函數、利用阻抗元素的精確演算法計算出阻抗矩陣，再運用mot法分別求解了介質體目標，金屬非金屬組合目標的時域積分方程，並分析了金屬非金屬組合目標分界面上的等效電流與等效磁流的特性。The diffraction formula and statistical law of optical fields are used to get the cross - correlation function of intensities of laser speckles of the moved diffuse object
該方法利用光傳播的菲涅爾衍射公式和光場的統計規律，給出散斑場光強在散射體位移前後的高斯光束相關函數的表達式。Compared with the general radar, the harmonic radar can provide more imformation when it is used to detect the nonlinear scattering target, and therefore improvers the radar resolution
與一般雷達探測技術相比，諧波雷達在探測非線性散射體時能提供更多的信息，提高了識別概率。Based on the backward propagation concept, we evaluated the feasibility of reconstructing the image of elastic wave sources and scatterers
依據逆時傳播的觀念以評估重建彈性波源及散射體影像的可行性。The purpose of this theme is to classify sar images into four regions : man - made targets ( vehicles and buildings ), natural targets ( trees and shrubbery ), background ( field and grass ) and shadow ( the target shadow and mirror scatter ). on the one hand, the processed results can be directly used as image product, which offer necessary parameters for expert ' s interpretation to build up an independent auxiliary interpreting system. on the other hand, the results can be introduced into sar image interpreting system as the replacing target detection and discrimination models with layer rois ( region of interest ) in order to provide potential target chips
具體內容為：根據sar圖像基本特性，提取可靠特徵，將圖像區分為人造目標（機動車輛、建築物等） 、自然目標（樹木、灌木、樹林等） 、背景（草地、平地、植被等）和陰影（目標陰影、鏡面散射體等）四種類別，為不同的應用提供對應的感興趣區域（ roi ） 。Design and realization of knowledge base for environmental influence evaluation idss
基於體等效原理的金屬散射體微波斷層成像Spectral data of the near field for locating the shape of scatterer with impedance boundary condition
由近場譜數據確定阻抗散射體的形狀The wireless location algorithm based on the scatter information is described in this paper
本文主要研究的是基於散射體信息的無線定位演算法。The first new algorithm which makes use of two base stations to locate mobile station needs only three scatters
在上述研究的基礎上，給出了兩種新的散射體定位演算法。If a scatterer like human head is used, intensity differences among microphones can be obtained efficiently
如果能夠利用一個類似人頭的散射體，則可有效地獲得傳聲器之間的強度差信息。Calculation for the radiation dose distribution and the impact of scatterer on radiation dose in a 60co container inspection hall using monte carlo method
集裝箱檢測大廳輻射場劑量分佈及其散射體的影響Although direct waves are much stronger than scattering wavefields, the imaging of the underground anomaly is still well reconstructed from the reverse time process
即使利用含有非常明顯直接波信號的歷時記錄亦可有效的重建地下散射體的影像。A typical bistatic weather radar net work is comprised of one traditional transmitter - receiver radar and one or more passive non - transmitting radar receiver at remote site. this type of multiple radar network offers unique advantages when compared to traditional radar net work. this paper introduces the concepts and principles of bistatic weather radar network and analyses, simulates, calculates the basic concepts of effective scattering particle volume relative to the receiver of bistatic radar network, the doppler shifts of the received signals, gives the formula to conduct the three dimensions wind field
本文從原理上分析了雙基地天氣多普勒雷達的構建、基本幾何關系、有效散射體積及其與雙基地角的關系，有效散射體積和目標與雙基地天氣多普勒雷達主站發射機的距離的變化關系，指出雙基地天氣多普勒雷達有效體積和單基地雷達有效照射體積隨之距離的變化有相似之處，但是由於收發分置的幾何結構，雙基地天氣多普勒雷達的性質與雙基地大氣多普勒雷達的散射角有著密切的關系。First in this paper, we review the development of radar signal processing and cfar detector, analyse the structure and principle of the signal processor, ca - cfar and os - cfar detectors. then, in view of the characteristic of prc cw signal, analyses the statistics characteristic of scattering bodies, models of target, noise, ground - clutter and weather - clutter are made. these lay a theoretic foundation of signal processing and cfar detector
然後，本文針對x波段偽隨機m序列相位編碼連續波信號體制，分析了各種散射體的統計特性，對雷達目標及檢測背景噪聲（熱噪聲、地雜波和氣象雜波）進行了理論分析和統計檢驗，建立了目標及檢測背景的目標模型，確立了信號處理和恆虛警檢測的理論基礎。A new study of specially spherical - glowing optical fiber is present in this paper, a large core silica optical fiber is melt the ball and is spread all scattering body evenly on the round spherical terminal surface, which is melt the ball to the spherical terminal surface again, thus getting the output optical fiber needed. 4. designing the system of testing the specially spherical - glowing optical fiber
3 .設計研製了一種特殊球形輸出光纖，實驗中採用大芯徑石英光纖，利用光纖熔接機對石英光纖端面進行熔球，在圓球形端面上均勻塗上光散射體，對所得的球形端面再次進行熔球，從而得到所需要的輸出光纖。It was found that after our careful processing of the absorption boundary for artificial reflection, we could use the time - trace records at the surface to invert the locations of seismic sources or underground scatterer accurately
經由適當的消除人為邊界反射，在只利用地表的歷時記錄即有效的推求出震源及散射體的精確立置。But using the high - frequency approximate method to deal with the coupling of parts of electrical - large size target is troublesome as well as not accurate. combining the moment method and the high - frequency approximate method is a development trend and study way in the future
但高頻近似方法對于電尺寸大而形狀很復雜的散射體各部件之間的相對禍合處理起來有些麻煩且不很精確。將高頻近似方法和數值方法（如矩量法）相結合，是以後的發展趨勢和研究方向。Traditional method can be classified two class : linear optimization technique and nonlinear optimization technique, linear optimization technique base on born approximation or rytov approximation is usually used to solve weak scattering problem
線性優化方法採用線性近似忽略了散射體內部的多次散射，可以有效的反演低對比度的問題，但對于高對比度問題的求解則有可能不收斂。分享友人