d array 中文意思是什麼
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A noncontact 3 - d position measurement system is introduced in this thesis. the system is composed of a planner array ccd detector, real time image analysis and quick data calculation system, which can survey the positional relationship between the haloid lamp objects on the emissive vehicle and the measuring system on the loading vehicle
本文研究了一種簡單、新型的非接觸三維位置測量系統，該系統由一組ccd探測器、實時圖像處理及快速數據解算系統組成，對發射車上鹵鎢燈目標在測量坐標系中的三維坐標x 、 y 、 z值和發射車軸線相對測量坐標軸的夾角進行測量。 -
The first kind of algorithm is based on s - box controlled by key, the algorithm distinguishes most of other block ciphers, its visible quality is that its s - box is not regular and fixative, but controlled by block cipher ' s key. the second kind of algorithm is based on smn ( d ) array code, it makes full use of the visible quality of smn ( d ) array code possessing big code distance ( d ). the thesis discusses the two algorithms " reversibility, security and their qualities, the
第一種是基於「 s -盒由密鑰控制」的變結構分組密碼，該演算法區別于其它大部分分組密碼最大的特點是它的s -盒不是固定不變的而是由密鑰控制產生；第二種是基於smn （ d ）陣列編碼的變結構分組密碼，該演算法充分利用了smn （ d ）陣列編碼具有碼距大的特點；文中對這兩個演算法的可逆性、安全性及其性能等進行了探討和分析，分析結果認為這兩個變結構演算法正確、有效且安全。 -
In this method of measuring time - resolved spectrum, a special light beam modulator translates the time - distribution of an optical spectrum into a space - distribution of light intensity of the light beam, and the space - distribution spectrum is dispersed by a multi - spectrometer, then it is detected by an ordinary 2 - d ccd array detector
瞬態時間分辨譜測量方法的主要思想：使用特殊光束調制器把光譜隨時間的變化過程轉化為光強的空間分佈，經色散后，以二維探測器接收並轉換光信號為電信號，用通用計算機控制採集並處理光譜數據。 -
For the purpose of estimating 2 - d doa of uniform circular array ( uca ), phase mode excitation based uca beamforming is employed to obtain real - valued beamspace manifold
對均勻圓陣列（ uca ）二維波達方向估計問題，運用相位激勵模式波束形成技術，得到圓陣波束空間實值陣列流形。 -
The following is main content of our thesis. the first, we analyze the system operation theory of cmos image sensor with pixel level adc ( a / d converter ). it is made up of three sections : pixel array, clock signal generator and sam ( sequential access memory )
本文的主要內容如下：首先，我們對像素級a d轉換型圖像傳感器的系統工作原理進行了分析，是由像素陣列、時鐘信號產生器和sam （順序讀寫存儲器）三部分構成的。 -
Lastly, the dissertation designs a rank - reduced blind space - time 2 - d rake receiver using time extraction which has not only the capability of space - time equilibrium but also reduces the convergence time of adaptive array and the rank of correlated matrix of the received data
最後，設計了一種時間抽取降秩盲空時2 - drake接收機。分析了其性能和參考信號的提取方法。該接收機不但具有空時均衡的能力，而且降低了陣列的收斂時間和接收數據相關矩陣的秩。 -
The digitizer based on pxi bus uses fpga ( field programmable gate array ) to implement 256 points, radix - 2 dit fft ( fast fourier transform algorithm ). the design uses pipelining for fft processing and can accomplish sampling and processing signals of two channels at the same time. in the signal acquisition circuit, - a / d convector is used to enhance the precision of the signal sampling
在本設計中，採用fpga （ fieldprogrammablegatearray ）實現了256點基2dit演算法復數fft （ fastfouriertransformalgorithm快速傅氏變換演算法）處理器，具有較高的速度和運算精度fft ，設計採用流水線處理方式大大的提高了處理速度，可實現對兩個通道輸入信號的并行採集與處理。 -
Based on a 3 - d transient thermal model with inhomogeneous heat generation, the temperature and thermal stress distribution in the disk of heat capacity laser pumped by high power laser diode array ( lda ) are simulated and analyzed by means of finite element methods
摘要為了研究激光介質熱畸變對固體熱容激光器的影響，數值計算了高功率激光二極體陣列抽運片狀激光介質的瞬態溫度場和熱應力分佈。 -
The spatial directional resolution ( sdr ) of the 2 - d regular arrays ( square array, circle array, l array ) was investigated in this paper by means of theoretical analyses and computer simulations
摘要利用理論分析和計算機模擬相結合的方法、對三種常用的二維均勻天線陣列（方陣、圓陣、 l陣）的空間方向特性進行了深入的理論和模擬實驗研究。 -
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。 -
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。 -
2 - d superresolution direction finding methods at subarray level suited for plane phased arrays are studied. for overcoming the limitations of true array manifold ( tam ) that the expense and cost of the array calibration are high and the calibration realization is complex, five kinds of simplified array manifolds are proposed, namely direct simplified array manifold ( dsam ), simplified array manifold based on ideal subarray patterns ( sam _ isp ), simplified array manifold based on approximate ideal subarray patterns ( sam _ aisp ), simplified array manifold based on gaussian subarray patterns ( sam _ gsp ), simplified array manifold based on approximate gaussian subarray patterns ( sam _ agsp ) respectively. the performances of applying these array manifolds to music, wsf and ml methods at subarray level are analyzed
本文研究了平面相控陣二維子陣級超分辨測向，針對真實陣列流形（ tam ）校正成本和代價高以及實現復雜的缺陷，提出了五種簡化的陣列流形分別為直接簡化的陣列流形（ dsam ） 、基於理想子陣方向圖的簡化陣列流形（ sam _ isp ） 、基於近似理想子陣方向圖的簡化陣列流形（ sam _ aisp ） 、基於高斯子陣方向圖的簡化陣列流形（ sam _ gsp ）和基於近似高斯子陣方向圖的簡化陣列流形（ sam _ agsp ） 。 -
Transforms the specified array of 3 - d vectors normal using the specified matrix
使用指定的矩陣轉換三維法向量的指定的數組。 -
Using the arrival times of 197 earthquakes well recorded by the beijing seismic network and the china - germany cooperative yanqing digital seismic array in the period from october of 2001 to december of 2005, we accurately relocate these earthquakes by the joint - inversion program for hypocentralr position and 3 - d velocity structure
摘要利用首都圈地震臺網和中德合作延慶數字地震臺陣2001年10月2005年12月獲得良好記錄的197次地震到時，運用地震震源位置和三維地殼速度結構聯合反演程序對這些地震實行精確定位。 -
Secondly, methods of improving on probe are investigated in detail : using the electromagnetic shielding effect to decay the direct - coupled magnetic field and using the dual probe to control the energy flow, so as to make the probe to be shorter ; designing 3 - d pick - up coil array to increase detection sensitivity. at last, experiment system is set up to verify the simulation result and the comparing result shows simulation result agrees with experiment result
其次，對改進傳感器性能的幾種方法進行了詳細研究:利用電磁屏蔽效應以衰減在直接路徑上的磁場傳播、採用復式探頭激勵方式以實現能流控制，從而減小傳感器體積，模擬證實這兩種改進方案有效;設計三維周向檢測線圈陣列以提高缺陷檢測靈敏度，模擬結果證實三維探頭的周向靈敏性。 -
The paper puts forward a combined - allocation - scheme based on the idea of constrained - block - allocation at the storing allocation strategy and gives disk - striping about the storing of big capacity disk array. in the study about the access path of the multi - media data, we introduce several kinds of representative multi - dimensions data index structure including k - d tree, r tree, vp tree and so on. ( 3 ) the research of multi - media database system architecture.
在存儲分配策略上根據受限塊分配（ constrainedblock ? allocation ）的思想，本文提出了聯合分配模式（ combinedallocationscheme ） ；並針對大容量磁盤陣列的存儲給出了條形分配方案（ diskstriping ） ；在多媒體數據的存取路徑的探討中，重點介紹了幾種有代表性的多維數據索引結構，有k - d樹、 r *樹、 vp樹等。 -
Thirdly, the dissertation presents an anti - interference technology of adaptive array for non - spread spectrum signal using a pilot signal, by which a non - spread spectrum system can use the decoupled 2 - d rake receiver and the original non - spread spectrum system need not be modified
第三，提出了採用擴頻信號作為導引信號的非擴頻信號自適應陣列天線抗干擾方法。該方法使得非擴頻系統可以採用解耦合空時2 - drake接收機，而且不改變原非擴頻系統。 -
To solve the problem that the present 2 - d temporal - spatial spectrum estimation algorithms are deteriorated when the number of signals become close to the dimension of the array, a kind of new signal model and approach for 2 - d temporal - spatial spectrum estimation is proposed
摘要針對現有空時二維譜估計演算法在信號數增大時均不同程度出現性能上的惡化直至失致的問題，總結了目前通用的空時二維譜估計信號模型，提出了「時域副流形」的概念及相應的信號處理方法。 -
The high - resolution spatio - temporal two - dimensional ( 2 - d ) spectra estimation of wide - band signal acts an important role in modern array signal processing. though abundant results acquired in theory, there are a lot of difficulties in the real time application of wide - band system
寬頻段高解析度時-空二維譜估計是當前陣列信號處理研究的一個重要方向，雖然在眾多學者的努力下已取得了豐富的理論成果，但是一直以來寬頻段陣列系統的工程實現存在很多困難。 -
Second the model of array was considered to have elements of finite width and infinitely large elevation dimension. this model ignore the effect of elevation on beam focusing. this paper study on phased array which was considered to have elements of finite width and finite elevation dimension, the influences of transducer parameters on focusing effect is analy / ed, including the number of elements ( n ), interelement spacing ( d ), elevation dimension ( l ), width dimension ( )
這種方法雖然計算方便，但實際很難實現，真正的振元總是有一定的尺寸，這種方法忽略了陣元的尺寸對聚焦效果的影響，后來，另一種線性陣的模型被提出，即認為單個陣元具有一定寬度a ，長度l為無限長，或者說a遠小於l ，這種模型忽略了陣元長度l對聲波聚焦效果的影響。
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