focusing error 中文意思是什麼
focusing error
解釋
對光誤差-
A sil flying head is designed to keep the distance between sil and recording medium in near - field range. a sil optical data storage system is built up when the recording head is combined with sil flying head. meanwhile, using astigmatic focusing error detection technology and twin optical pick - up heads, a novel nontouching nanometer measurement method is developed to measure the flying height of sil, and provides us with a powerful tool to optimize the design of sil fly head
在sil存儲技術研究方面，首先提出一種光學玻璃熱熔加工製作sil的新方法，該方法克服了小半徑球透鏡加工的難題，成功製作出了半球固體浸沒透鏡；設計了sil飛行頭系統，並利用光學頭像散法聚焦誤差檢測原理，設計出一種雙光學頭sil飛行高度測量方案，實現了sil飛行頭飛行高度的測量。 -
For 15mhz immersion focusing ultrasonic testing signal, the proper sampling frequency is 90mhz, the appropriate strobe - width is 1. 2us and the sampling error less than 20 %
本文的試驗分析結果表明，對于中心頻率為15mhz的水浸聚焦探頭，其采樣頻率應不低於90mhz ，閘門寬度為1 . 2us ，特徵點的采樣誤差應不大於20 。 -
Triggering time synchronization error model is derived, and based on phase noise model of frequency source, random synchronization error is considered. the effect of fixed and linear error on focusing quality is given by simulation
模擬試驗給出了固定、線性、正弦及隨機型觸發時間同步誤差對點目標成像指標的影響，同時給出了相應的面目標模擬結果。 -
Above elaborated explains two points : first, although there are many advantages of the computer simulation, but can not be completely divorced from or replace tests, finally is must depend on experiments performs to confirm. second, computer simulation is a trend to replace test, but the key question is to resolve the model error. in view of former, the author of this study focusing on the principle of emphasize the test, researched the techniques factors of the components of the vehicle body works on the anti - collision capability
殘余應力會有一定程度的釋放，材料的強化會隨之變化，那麼以往的研究中之考慮了沖壓成型階段帶來的厚度分佈不均和殘余應力、應變，卻忽視了由於高溫固化時溫度升高所帶來的殘余應力釋放，這樣最終會直接影響到碰撞模擬模擬的精度，從而導致車身結構的碰撞安全性指標的不精確。 -
Focusing on the spatial cam mechanism ( scm ), the dissertation, starting with the practical processing and the characteristics of the structure and meshing, detailedly analyzes and experiments research the structure theory, processing error and, one - side process and profile inspection of scm with spatial meshing principle and rotating transformation matrix operator methods
本文以空間凸輪機構為研究對象，從工程實際出發，以空間嚙合原理和旋轉變換矩陣為工具，從結構特點、嚙合特性入手，對空間凸輪機構的結構設計、加工誤差、單側面加工工藝及廓面檢測技術進行了深入地理論分析和實驗研究。 -
Focusing on this problem, this paper presents a new framework for adjustable power allocation, discusses the power allocation when each user has the limited power, and researches on the target of minimizing the sum of two users bit error rate based on the framework
針對這個問題，給出了一種新的具有可調系數的功率分配框架，討論了在每個用戶功率受限情況下的功率分配方案，並且基於該框架研究了以2用戶的比特誤碼率之和最小為目標函數的功率分配方案。 -
In chapter 4, the performance of asynchronous systems with multilevel spreading codes based on periodical repetition of quantized chaotic time series is presented, focusing on the ds - cdma systems. some computer simulations for four kinds of chaos - based sequences are given to examine the results that chaos - based sequences outperform the classical spreading sequences ( maximum - length and gold sequences ) and the chaos - based sequences from the chevbyshev maps ( k = 3, 7, 11 ) is the best among them. as the result of these optimization effort, two design means toward sequences optimization are obtained, in which one is based on the entropy theory, the other is on minimizing the average possible error
3 、本文的第四章分析了混沌序列的各種統計特性，著重研究混沌序列作為混沌擴頻序列在ds ? cdma系統中的抗擾性能，對不同的混沌擴頻序列和典型的擴頻序列進行了模擬，從模擬結果中可知，混沌擴頻序列的性能可以與典型的擴頻序列媲美，經過優化設計的混沌序列特性優于典型的擴頻序列；在混沌序列中， chebyshev混沌序列（ k等於3 . 7 . 11 … …時）是最佳序列之一。 -
Using square error function and the barycenter algorithm of light intensity as the merit function of focusing and alignment respectively, the system analyzed the images captured by charge coupled device ( ccd ) in the projection screen to produce feedback signals
該系統運用數字圖像處理技術，以方差函數和光強重心演算法分別作為清晰度調節和三色和色調節的評價函數，分析電荷藕合器件（ ccd ）採集的局部圖像，產生反饋信號。 -
The parallel computing ability of wave number domain algorithm is also being studied basically. the influence of the carrier movement errors on the sas image is analysed in chapter three firstly. based on studying those algorithms which have been successfully applied in sar, the limitations of these auto - focusing algorithms are discussed. hereafter an auto focusing algorithm based on time delay and phase error evaluation is raised, which can compensate big movement error effectively and so can be applied in sas
第三章首先分析了孔徑上運動誤差對合成孔徑聲吶圖像的影響，在研究在sar領域里成功應用的演算法的基礎上，對其運動補償的局限性做了分析，提出一種基於時延相位估計的自聚焦演算法，它能夠有效地補償運動誤差帶來的影響，並且適用於sas運動誤差較大的情況。 -
According to the current codes, piles under inclined loads top are analyzed respectively under axial and lateral loads with the results superposed, in which inaccurate error is inevitable. focusing on this point, the analysis of pile and pile group under inclined loads are thoroughly discussed in this article
本文針對我國現行規范將樁頂傾斜荷載分解為豎向和水平荷載分別計算再進行迭加而存在的計算誤差較大的不足，對傾斜荷載下基樁及群樁的受力分析進行了深入的探討。
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