pattern array 中文意思是什麼
pattern array
解釋
圖像陣列-
The glob ( ) function returns an array of filenames or directories matching a specified pattern
函數的作用是：以數組的形式返回與指定模式相匹配的文件名或目錄。 -
Just as nb antenna array the pattern of uwb tem - horn antenna array is concern with the number and distance of elements at which the pattern lie in
陣列某一面方向圖僅與這一面的單元個數及單元間距有關與其它面的陣列單元個數和單元間距無關。 -
In this dissertation, switched parasitic pattern diversity yagi - uda antenna array used for the base station has been illustrated after the introduction of mimo technologies and the analysis of the base station antenna design for next generation of wireless communication
本文在介紹mimo技術和分析新一代移動通信中基站天線的設計思路的基礎上，給出了一種適用於mimo系統基站、具有角度分集功能的開關八木天線陣列。 -
The characters of this antenna lie in three points : using yagi - uda antenna to obtain antenna gain through the radial direction ; making full use of the space of the base station along the z - axis direction to get array gain ; arranging the antenna array properly to achieve pattern diversity in azimuth plane
其特點集中體現在三個方面:在天線徑向通過八木天線的形式獲得增益;充分利用基站空間在z向組成陣列獲取陣列增益;利用開關八木天線方向圖可重構的特性，通過合理的布局，在方位面內實現角度分集。 -
The main feature of aesa is to adaptive produce null in the pattern by weight control of elements in the array
通過陣元收發幅相的權矢量控制，以使波瓣在產生干擾的方向「置零」 。 -
The study gets the following conclusions : 1 ) inverted nine - spot pattern water flooding is used in the early stage of the development, while linear water flooding is used in the later stage ; 2 ) well array is parallel to the fracture trend ; 3 ) the well arrangement of barycentric position method is a suitable pattern adjustment method in the later period of the development in low permeable oil fields
研究認為，一是油田開發初期注采方式採用反九點法面積注水，開發後期調整為線狀注水方式；二是井排方向與裂縫走向平行；三是「重心位置」布井方式對低滲透油田開發後期是較為適合的井網調整方式。 -
The paper studies three key problem of base station array antenna for mobile communication, controlled radiation pattern, beam width and passive intermodulation
本文研究移動通信基站天線中的三個關鍵問題，波束賦形、波瓣寬度、無源交調。 -
Then, pattern synthesis for sparse array antenna using genetic algorithms is researched. at last, we researched on conformal patch on the surface of cylinder and the effect of conformal antenna platform on the radiations of patches in different positions. how to get a good feeding for conformal array antenna by genetic algorithms is presented in the end
文中介紹了遺傳演算法在綜合低副瓣陣列中的應用;採用遺傳演算法給陣列天線的方向圖賦形，其結果優于同種條件下用woodward法得到的結果;同時，考察了遺傳演算法的穩定性;分析討論了遺傳演算法在綜合稀疏相控陣方向圖綜合中的應用。 -
On the base of above it, this paper discuss the synthesis of optimum distributed arrays by nonuniform spacing in the sense of dolph - chebyshev. having derived the equations of optimum element distribution, we analyze the exponentially spaced array, which are optimum when the elements are isotropic and equally weighted, and the array by general raised cosine function. the formulate for estimating the sidelobe envelope, beamwidth of the array pattern and clean region width are obtained
推導了最佳陣元分佈方程，分別對陣元無方向性和等加權時的最佳分散式陣列? ?指數間隔陣列和採用廣義升餘弦加權的最佳分散式陣列進行了分析，推導了天線方向圖旁瓣包絡、波束寬度，干凈掃描區寬度的估計公式，給出了近軸旁瓣電平與陣列參數的關系。 -
Abstract : a new waveguide which can change the wide wall of a rectangular waveguide into a symmetric arc wall is named as a cam - rectangular waveguide. comparing to sectoral waveguide, the new waveguide has the same voltage characteristics and is easier to be produced and fixed. an approximate formula of the dominant mode fields and the normalized conductance of a longitudinal resonant slot cut in the curved wall of a cam - rectangular waveguide are given. a resonant slot linear array in c & x band is designed, in which the slot voltage distribution is equiphase and the input is matched. the input voltage stationary ware ratio and the h - plane pattern of the antenna are measured. the experimental results show the conformance with theoretical results
文摘:把常用的矩形波導一個寬面改成圓弧形構成的波導稱為圓突-矩形波導.這種波導與扇面波導相比：電性能相當；波導管結構更加簡單，容易加工，便於安裝.文中給出圓突-矩形波導中主模場，圓曲面上縱向槽歸一化諧振電導近似公式.設計了c和x波段波導曲面縱向諧振縫隙線陣，縫隙電壓相位為同相分佈，輸入端匹配.實際測量了天線輸入端電壓駐波比和h面方向圖，理論與實驗相吻合 -
While carrying out the scheme, at first, the basic theory of antenna, array antenna and electromagnetic absorption, the performance parameter of antenna and parabolic antenna are deeply researched. in conformity, the characteristic and calculation of aperture field and near - to - far - field transformation for radiation pattern are detailed analyzed. second, the factors such as, the amount of the antenna elements, mutual coupling between each element, ground and the buildings on earth ' s surface, which affect the performance of array antennas ’ resultant field are stressed discussed
在系統實現過程中，課題首先從天線、陣列天線，以及電磁場計算方法的基本理論著手，分析了天線與拋物面天線的各項性能參數，以及天線的口面場和近-遠區輻射場的特點和計算;進而，更加深入的討論和研究影響天線陣列合成場強的各項因素，包括系統所使用的天線單元個數對陣列合成場的影響、天線單元之間由於互耦造成的影響、傳播過程中地面和/或地面建築物的影響等。 -
The correlated double sampling ( cds ) circuits structure is used to reduce the fixed pattern noise ( fpn ) of the cmos sensors, and improve the signal - noise ratio ( snr ). the 256 photodiodes arrayed 4 quadrants sensor consists 16x16 active photodiodes array. correlated double sampling processing circuits, output buffer amplifiers and digital control part
針對cmos製造工藝中mos器件固定模式噪聲（ fixedpatternnoise ， fpn ）較大的不足，研究中採用了相關二次采樣（ correlateddoublesampling ， cds ）電路降低固定模式噪聲，從而提高了傳感器的信噪比（ signalnoiseratio ， snr ） 。 -
In rsdm, binary patterns are replaced by real - valued patterns, accordingly avoiding the coding process ; the outer learning rule is replaced by regression rule, therefore the model has not only the ability of pattern recognition but the ability of function approximation. the prearrangement of the address array bases on the distribution of patterns. if the distribution of patterns is uniform. then the address array is prearranged randomly, otherwise predisposed with the theory of genetic algorithm and the pruneing measure so as to indicate the distribution of patterns and improve the network performance. non - linear function approximation, time - series prediction and handwritten numeral recognition show that the modified model is effective and feasible
在rsdm中，以實值模式代替二值模式，避免了實值到二值的編碼過程：以回歸學習規則代替外積法，使該模型在具有識別能力的同時具有了對函數的逼近能力；地址矩陣的預置根據樣本的分佈採取不同方法，若樣本均勻分佈，則隨機預置，否則利用遺傳演算法的原理和消減措施來預置地址矩陣，使之反映樣本的分佈，改善網路的性能。 -
Smart antenna has been widely researched in communication and signal processing, the adaptive beamforming algorithm is the key technique of smart antenna. it could adaptively steer the array directional pattern to form the main narrow beams with high gain in the direction of the users " signals while deeply nulling the interference signals. it is an effective way to realize the optimal receiving of the interesting signals
智能天線技術是目前通信和信號處理等領域的研究熱點，自適應波束形成演算法的研究是智能天線的一個關鍵技術，它能夠自適應地控制天線陣方向圖在用戶信號方向產生高增益窄波束，在干擾信號方向產生較深的零陷，是實現用戶信號最佳接收的有效方法。 -
In this thesis, our work is focused on analyzing the effects of mutual coupling between elements of the thin dipole antenna array. the effects of mutual coupling on the antennas pattern synthesis and the amplitude - phase consistency of the input impedance of the uniformly - space liner array are presented. a new method that used the mutual coupling to synthesize the pattern is been given
本文就是以此為出發點，將半波長細線對稱振子線天線陣作為研究對象，以分析天線陣列的互耦影響為核心，討論互耦對幾種方向圖綜合技術的影響，並從兩種不同的角度提出了對陣元互耦的校正方法。 -
An xml schema pattern to help distinguish between a null and an empty array
一種幫助區別零數組和空數組的xml schema模式 -
Until standards bodies recognize and map this wrapped array pattern appropriately, this solution is something you should apply only if you really must distinguish a null array from an empty array
只有在標準組織適當地認可和映射這個包裝的數組模式之後，您才能應用這一解決方法（如果您確實需要區別零數組和空數組的話） 。 -
The method uses both linearly constraints and quadratic pattern constraints to control the beam pattern, which is used in arbitrary array synthesis. it is simple effective and feasible
此演算法同時應用了線性約束和二次約束來控制波束特徵，適用於任意陣列的綜合，演算法簡單，計算效率高。 -
A main mission of antenna pattern synthesis is to determine the array ’ s excitation coefficients
天線方向圖綜合的一項主要任務，是確定陣元的激勵系數。 -
The 3 - d vector and pattern of electromagnetic field and power density on a sphere from an array of time harmonic current
弦變線電流陣列在球面上電磁場及功率密度流之時變向量與三維場形。
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