frequency array 中文意思是什麼
frequency array
解釋
頻率分配-
Based on the real situation of submarine and antisubmarine warfare ( asw ), according to the classical design theory of transducer or transducer array, a sonar will be researched and made, which has the feature of more wider bandwidth, more lower operating frequency, more lager radiation acoustic power, more farther operating distance, more higher researching efficiency and more higher directive accuracy
本文根據現代潛戰和反潛戰（ asw ）的實際情況，按照經典的換能器和基陣的設計理論，研製聲吶，旨在擴展其頻帶寬度、降低其工作頻率、增大其發射功率、擴大其作用距離以及提高其搜索效率和定向準確度。 -
Secondly, this paper illustrated the nonlinear phase dynamic theory of the aia array and the application of it to power - combining and beam - scaning technique. according to these theories, the coupling parameter of nearest neighbors was found by experiment, then the two - element and three - element aia array were designed, and the result of measurement was in agree with that of the nonlinear phase dynamic theory, and the beam - scaning of two - element array was realized by tuning the free oscillation frequency of the elements
其次，本文討論了有源集成天線陣列的非線性相位動態理論以及它在功率合成和波束掃描方面的應用，包括同步工作條件、穩定條件和相位動態方程等，通過實驗確定了陣列中相鄰單元間耦合參數，並將之運用於有源集成天線二元陣和三元陣的設計，實驗結果與理論結果吻合較好。 -
In current practice, array parameters are usually calculated according to the strength and types of interference wave, frequency characteristics, and azimuth, whereas the effect of array center is often ignored, and simply view the graphic center as array center
指出現在施工設計中，組合參數的確定主要圍繞干擾波、頻率特性和方位角等方面進行論證，忽視了其組合中心的確定。 -
The focus of this paper is the problem of frequency optimum codes of irrelevance processing. the method of researching optimum codes by using costas array method is given
著重討論了非相干處理時的頻率最優編碼問題，給出了以costas陣列方式尋找最優編碼的方法。 -
Abstract ： to obtain the high frequency ( hf ) array signals, an applied circuit called hf array signals generator is designed using dsp and duc ( digital up converter ). the generator simulates the generation of output signals of 9 - element arrays with different array format, different direction of arrival ( doa ) and existing cochannel signals respectively
為了在實驗室中獲得短波天線陣列信號，應用dsp晶元和duc晶元（數字上變頻器）設計了一個實用電路短波陣列信號發生器，模擬實現了短波九元天線陣的多種陣型、不同來波方向及存在同頻多信號時的陣列輸出信號。 -
The essence of edid is to set up a normal behavior fuzzy sub collection a on the basis of watching the normal system transfer of the privilege process, and set up a fuzzy sub collection b with real time transfer array, then detect with the principle of minimum distance in fuzzy discern method the innovation point of this paper is : put forward the method of edid, can not only reduce efficiently false positive rate and false negative rate, also make real time intrusion detection to become possibility ; have independent and complete character database, according to the classification of monitoring program, design normal behavior and anomaly behavior etc., have raised the strongness of ids ; use tree type structure to preservation the character database, have saved greatly stock space ; in detection invade, carry out frequency prior principle, prior analysis and handling the behavior feature of high frequency in information table, have raised efficiency and the speed of detection, make real time intrusion detection to become possibility ; have at the same time realized anomaly intrusion detection and misuse intrusion detection, have remedied deficiency of unitary detection method
這種方法的實質是在監控特權進程的正常系統調用基礎上建立正常行為模糊子集a ，用檢測到的實時調用序列建立模糊子集b ，然後用模糊識別方法中的最小距離原則進行檢測。本文的創新點是：通過對特權進程的系統調用及參數序列的研究，提出了基於euclidean距離的入侵檢測方法edid ，不僅能有效降低漏報率和誤報率，而且使實時入侵檢測成為可能；設計有獨立而完整的特徵數據庫，根據被監控程序的類別，分別設計正常行為、異常行為等，提高了檢測系統的強健性和可伸縮性；特徵數據庫按樹型結構存儲，大大節省了存儲空間；在檢測入侵時，實行頻度優先原則，優先分析和處理信息表中的高頻度行為特徵，提高檢測的速度和效率，使實時入侵檢測成為可能；同時實現了異常入侵檢測和誤用入侵檢測，彌補了單一檢測方法的不足。 -
Compare to the normal rectangular waveguide, ridge waveguide has the character of broader bandwidth, smaller dimension, lower equivalent characteristic impedance, etc. because of these merits, it is used more and more widely, such as broadband ridge waveguide filter, broadband direct coupler, diplexer, frequency converter, phase shifter, ridge waveguide slot antenna array, and so on
與普通矩形波導相比，脊波導具有工作頻帶寬、尺寸小、等效特性阻抗低等特點。由於脊波導本身的特點，使其得到了越來越多的應用，例如寬帶脊波導濾波器、寬帶定向耦合器、雙工器、變頻器、移相器、脊波導縫隙天線陣等等。 -
Through the controls of geometric dimension of micro - nozzle and driving frequency to obtain the volume of droplets in the grade of pico to femto litre, which is applicable to make high density micro - array
通過微噴嘴幾何尺寸控制和驅動頻率控制獲得從飛升到皮升級樣點體積，可以用於製作高密度的微陣列。 -
Floquet ports : these periodic ports enable designers of phased - array antennas and frequency - selective surfaces to obtain separate fields into modes for better understanding and examine phase information for each mode
傅里葉埠:這種周期性的埠可以使相控陣天線和頻率選擇表面的設計者能夠得到不同傳輸模式下的場型，從而能夠更好地理解和驗證每種模式下的相位信息 -
Analysis of finite array structure plays an important role in the design of array antenna and frequency selective surface
有限陣列散射場的分析對于陣列天線的隱身設計和頻率選擇表面的設計具有重要作用。 -
Based on the idea of improving the frequency characteristic of the two parameters above, a novel method of improving the bandwidth of the slot array antenna is presented in this paper, which uses a ridged waveguide instead of a rectangular waveguide as the radiating waveguide
本文以改善這兩個參數的頻率特性為出發點，提出了一種展寬波導裂縫天線帶寬的新方法，即用脊波導代替矩形波導作為輻射波導。 -
Especially, designing conformal phased array antenna in such high frequency is a challenge subject
尤其在毫米波段這樣高的頻率下設計共形相控陣天線是具有挑戰性的課題。 -
The research results are controlled source which has linear or nonlinear variabe frequency scan function and the seismic instruments which match with it, and the method of small group intervals, small offset, much more channels, short array length, high - frequency receivers are applied during the link of data acquisition, and that the techniques of the refraction static correction, the noise suppressing, the high - resolution velocity analysis, the wavelet length compression, the wavelet zero - phase, and the prestack migration should be applied emphasizedly during the link of data processing and interpretation
研究表明，對于城市活斷層的抗干擾高解析度淺層地震勘探，在數據採集環節應採用具有線性或非線性變頻掃描功能的可控震源和與其相匹配的地震儀器，以及小道間距、小偏移距、多接收道、短排列和高頻檢波器接收的工作方法；在數據處理與解釋環節，要重視折射靜校正技術、噪聲壓制技術、高精度速度分析技術、子波壓縮技術、子波零相位化技術和疊前偏移技術等的應用。 -
Mainly this paper discusses applying time - frequency analysis in several questions, including estimation of doppler parameter imaging of sar, detection of moving target and estimation of direction of arrival in array signal processing
本文討論了時頻分析在合成孔徑雷達成像中的多普勒參數估計的應用、時頻分析在動目標檢測中的應用以及它在信源來波方向估計中的應用。 -
Secondly, the dissertation presents a 3 - dimensional searching method with afc and pn code synchronization and adaptive array convergence in order to accurately estimate the frequency difference between the received signal and the local oscillator
其次，為了準確估計接收信號和本地振蕩器之間的頻差，提出了afc 、 pn碼同步、自適應陣收斂的三維搜索策略。 -
The non - aliasing frequency and non - ambiguous 2 - d angles is obtained by the phase characteristic of eignevalue and integral search method in this dissertation, an algorithm of spatio - temporal 2 - dspectra estimation based on 4th - order cumulants was introduced and used to realize a prototype scout, a calibration algorithm in the wide - band array system is proposed
本文主要介紹了基於四階累積量的時-空二維譜估計演算法，並以此為基礎來實現時頻空三維偵察機；寬頻段陣列系統各種誤差參數的校正演算法，實驗系統的硬體驅動程序的開發和應用軟體的開發。 -
The injection - locking technology, characterized by the frequency stabilization, amplification, modulation and etc, has been widely used in the small - signal recovery, frequency synchronization, power synthesis, phase modulation and etc in the microwave, millimeter wave and higher frequency range communication and phased - array systems
注入鎖定技術具有穩頻、放大、調制等特性，已被廣泛應用於微波毫米波以及更高頻段通信和相控陣系統中的小信號恢復、頻率同步、功率合成、相位調制等。 -
This method is easy to implement and has no restriction on array geometry and sensor patterns ; three methods for the design of broadband frequency invariant beamformer are proposed, which are the method of resampling signals received by the array, the dft ( discrete fourier transform ) interpolation method and adaptive synthesis method, respectively. examples and performance analyses are given for each method ; a simplified linear constrained minimum variance broadband adaptive algorithm that based on dft interpolation method is presented. compared with conventional broadband adaptive algorithms, the presented method can reduce computation work greatly
提出了一種簡單、易於實現的恆定束寬波束形成器設計方法，該方法對陣形和陣元指向性沒有任何限制；分別提出了基於陣列接收數據重采樣、基於dft插值和自適應綜合的三種具有頻率不變波束圖的寬帶波束形成器設計方法，對于每一種設計方法都給出了一個設計實例並做了性能分析；提出一種基於dft插值的簡化線性約束最小方差寬帶自適應陣列演算法，該方法可以大大降低自適應陣列的運算量。 -
When the element of array is near enough, the stacked tem - horn array can improve the radiation of lower frequency
當陣列疊狀排列並且相鄰陣列單元極板間距較小時，可以改善低頻輻射特性。 -
The operating frequency, acceptance range and other essential parameters are confirmed. the high frequency array is designed
其次，進行了高頻基陣設計，確定了基陣的各基本參數。
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