系統性偏誤 的英文怎麼說

中文拼音 [xìtǒngxìngpiānwù]
系統性偏誤 英文
systematic bias
  • 系 : 系動詞（打結; 扣） tie; fasten; do up; button up
  • 統 : Ⅰ名詞1 （事物間連續的關系） interconnected system 2 （衣服等的筒狀部分） any tube shaped part of ...
  • 性 : Ⅰ名詞1 （性格） nature; character; disposition 2 （性能; 性質） property; quality 3 （性別） sex ...
  • 偏 : Ⅰ形容詞1 （不正; 歪斜） inclined to one side; slanting; leaning 2 （只側重一面） partial; prejudi...
  • 誤 : Ⅰ名詞（錯誤） mistake; error Ⅱ動詞1 （弄錯） mistake; misunderstand 2 （耽誤） miss 3 （使受損害...
  • 系統性 : systematicness系統性原則 principle of systematization
  • 系統 : 1. （按一定關系組成的同類事物） system 2. （有條理的;有系統的） systematic
  1. The carrier wave is modulated directly by the baseband signal at several frequency point in l band and s band. firstly, this paper clarifies the theory of i / q modulation, elaborates evm and acpl, and analyzes the effect of amplitude and phase unbalance and dc offset on evm. secondly we review the basic principle of phase locked loop and it ’ s composing parts, including the basic conception and design method of pll frequency synthesizer, especially introduce the charge pump pll frequency synthesizer in detail

    首先，在闡述i / q正交調制基本原理的基礎上，通過對誤差矢量和鄰近通道功率泄漏的詳細分析，定性、定量地討論了各種非理想電路因素（如相位不平衡、幅度不平衡、直流偏差等）對調制器性能的影響;其次，介紹了鎖相環的工作原理和基本組成部分，包括鎖相環的設計和環路濾波器的設計，特別詳述了電荷泵鎖相頻率源;第三，介紹了採用直接調制技術模擬衛星信號的射頻前端的設計;最後，對整個直接射頻調制系統進行測試，結果基本上達到了課題要求。
  2. The improvements in the iaga contained adding strengthen operator, improving evaluation index of premature, etc. multi - phase homing project, making use of the flight properties of parafoil system in gliding and turning, was simple in control and facile in practice. based on frenet frame, the linear time - variable error equations of parafoil system were built

    基於frenet坐標系推導和建立了翼傘系統線性時不變的誤差方程，並運用「投影點」的思想來獲得frenet坐標系下偏差量的解析近似表達式，從而設計了用於翼傘系統航跡跟蹤的傳統pd控制器和增益調節型模糊pd控制器。
  3. By calculating parameters including the link length, the azimuth angle, the elevation, the optical power that the inter - satellite optical cdma communication system will receive, the variation range of the azimuth angle and the elevation from the optical antenna of atp are understood well. by analyzing the factors to impact bit - error - rate ( ber ) from the received power, multi - user disturbing, background noise, wavelength, bit rate etc, measures to guarantee high performances of the system are obtained, especially those for smoothing the fluctuation of the received optical power from host platform vibration

    分析研究了衛星光cdma通信系統中衛星仰角、方位角和距離，給出了探測器能夠接收到的光功率以及atp子系統捕獲及跟瞄的范圍;對衛星光cdma通信系統性能模型和基於衛星振動系統性能模型的研究，分析了多用戶干擾、接收光功率、背景光噪聲、振動偏差以及碼速率對系統誤碼率的影響，給出了相應的改進措施。
  4. Taking intercontinental ballistic missiles as objects under research, and based on the analysis of the influence of accelerometer measurement error and gyroscope excursion error on the apparent acceleration, the error transfer model of the inertial system in a midcourse guidance segment for velocity and location is given, and the pure inertial navigation guidance error is computed with the given imu error coefficient deviations

    摘要針對洲際彈道導彈，在分析加速度計測量誤差和陀螺漂移誤差對導彈視加速度影響的基礎上，給出了中制導段慣性系統對速度和位置的誤差傳遞模型，對給定的慣組誤差系數偏差進行了純慣性導航制導誤差計算。
  5. In this dissertation, we studied the tcra1101plus total station position system, which introduced the principle and characters of the instrument ' s closed loop tracking system. also we explained the cause of prism ' s position error and brought forward mathematic model to correct, moreover, the good results has been drawn form the expenriments. the kinetic survey system have been realized, which the sampling rate attain more than 5hz and the position precision can be less than 2mm on condition that targeted - point moving slowly at the velocity below 2cm / s. having finished the survey system to examine whether the fine - tuning stewart platform in good status, we have finished mensurating the position reference of the fine - tuning stewart platform and the offset of the prism

    在此基礎上研製了多臺儀器在線控制高頻采樣動態跟蹤測量系統，采樣率大於5hz ，在跟蹤小於2cm / s低速運動目標時，測量精度好於2mm ；完成對饋源二次精調系統的檢測，包括對二次精調平臺位置基準的標定和觀測棱鏡偏心差的測定；設計不同動態測量實驗，對全站儀動態跟蹤的誤差來源和特點進行了分析；從實驗角度，對全站儀的測量時滯及其穩定性進行了測試分析，給出了定量的結果；比較了全站儀和計算機的內部時間系統，發現兩者存在較大差異。
  6. The accurate calculation of the input voltage and the compensation for the dc - offset error and the variation of the stator resistance are important factors in practical implementation of the integration since they can cause a drift in the stator flux linkage trajectory and furthermore deteriorate the quality of torque control

    因此，輸入電壓的準確計算、直流漂移量的補償以及定子電阻變化的補償都是影響積分計算準確性的重要因素，這些誤差會導致定子磁鏈軌跡的偏移，進而降低系統轉矩控制的性能。
  7. By using auto - adjusting boundary conditions and the method of three cubed spline curve fitting, the system software can recover both of the horizontal and vertical beam profile. the measurement system can also measure the beam landing screen error of cpt. it provides a important measurement and analysis tool to improve the performance of electron gun and dy, and improve the definition of cpt

    系統軟體中，提出了採用動態確定邊界條件，通過對離散采樣點的三次樣條插值曲線的擬合恢復束斑x和y方向的輪廓，本系統既能準確客觀地描述電子束輪廓，又能夠準確快速地測量電子束著屏誤差等多種參數，為cpt電子槍和偏轉系統的性能改進與解析度的提高提供了有力的測試分析和研究手段。
  8. Other imperfections are due to the practical limits to which correction can be made for systematic effects, such as offset of a measuring instrument, drift in its characteristics between calibrations, personal bias in reading an analogue scale or the uncertainty of the value of a reference standard

    其它非理想性因素是由於對系統效應的修正產生的實際限制，比如測量儀器的誤差，兩次校驗之間的性質偏移，個人讀取量數的偏差或者參考標準值的不確定性。
  9. First, the basic theory of static load sharing mechanism has been presented, mainly including manufacturing and assembly error of each gear component ' s axis and each bearing ' s axis, gear size ( tooth thickness ) errors, simultaneous error of middle two - tooth. the formula of equivalent mesh error has been deduced, the load sharing coefficient has been computed. second, the influences of each error on the static load sharing coefficient have been discussed

    首先，從靜力學的角度研究了星型齒輪系統均載的基本原理；確定了影響齒輪系統均載特性的製造和安裝誤差，主要包括：各個齒輪構件的中心軸線製造和安裝誤差、軸承中心軸線的製造和安裝誤差、齒厚偏差、雙聯星輪同時嚙合線誤差；推導了這些誤差的當量嚙合誤差的計算公式，分析了系統的均載特性。
  10. The whole system has friendly interface, convenient operation and comprehensive functions, which can be used widely in scientific research institutes and factories. the system of blower performance auto - testing improves the stability of testing process, avoids the error of reading, the error of calculation and the error of result causing by relative datas can not be recorded at the same time, the precision and efficiency of testing is largely improved

    整個系統具有界面友好、操作方便、功能齊全等優點，試驗結果表明研製基於虛擬儀器的風機性能自動測試系統，增加了試驗過程的穩定性，避免了人為的讀數誤差、計算誤差以及相關數據不能同時記錄所引起的試驗結果的偏差，提高了測試精度和試驗效率。
  11. In order to get this, some useful explorations on how to analysis and solve the problem of the ill - conditioning have been made and several biased estimators have been put forward. in fact, analyzing the essence, overcoming the effect of ill - conditioning and obtaining more accurate and stable parameters estimator is an new task in gps surveying data processing, which have been determined as an important studying field in contemporary surveying error theory and engineering data processing by the international association of geodesy ( iag )

    事實上，分析測量平差系統病態性的實質、克服或減弱測量平差系統病態性的影響、採用有偏估計等方法提高參數估計和平差成果的精度，是當前gps等重大測量工程數據處理中所面臨的一個重要課題，它已被國際大地測量協會（ iag ）確立為現代測量誤差理論及數據處理研究中的一項重要內容。
  12. After analyzing the performance of the coherent tree - structured optimal joint detection ( tsojd ) for qpsk signals and deriving a non - coherent multi - user weight / phase estimator, the dissertation proposes a low complexity non - coherent multi - user weight / phase optimal joint detection algorithm. besides, the dissertation proposes a partial coherent multi - user / iv weight / phase optimal joint detection algorithm and some useful conclusions are obtained in comparison experiments. 4. in the research on the diversity techniques for fast fading multi - path channels, the dissertation proposes a time - scale rake receiver, and analyzes its performance with the conception of auto - wavelet - transform ( awt ) and time - - scale resolution

    提出了過飽和低復雜度qpsk信號的樹型最佳聯合檢測演算法，並分析了相應最佳接收機的性能及相位偏差對性能的影響等問題；考慮了載波相位和多用戶信碼的聯合檢測問題，通過理論推導給出了過飽和多址系統中多用戶信碼/相位聯合估計子，提出了低復雜度非相干多用戶信碼/相位最佳聯合檢測演算法，並分析了此非相干最佳接收機的誤碼性能及相位提取誤差等有關問題；提出了部分相干多用戶信碼/相位最佳聯合檢測演算法，通過計算機模擬分析了該接收機的誤碼性能及相位提取誤差等有關問題，並與相干、非相干解調兩種情況作了比較，得出了一些有益的結論。
  13. In training of back - propagation neural network, parameter adaptable method which can automatically adjust learning rate and inertia factor is employed in order to avoiding systemic error immersed in a local minimum and accelerating the network ' s convergence ; introduced the further optimization of the network ' s structure, it gives the research result of selection of the hidden layers, neurons, and the strategy of re - learning, compared the sums of the deviation square of this algorithm with conventional bp algorithm, as a result, the approach accuracy and the generalization ability of the network were extremely improved

    在對前饋神經網路的訓練中，使用參數自適應方法實現了學習率、慣性因子的自我調節，以避免系統誤差陷入局部最小，加快網路的收斂速度；提出了優化bp網路結構的實驗研究方法，並給出了有關隱含層數和節點數選擇以及再學習策略引進的研究結果。將該演算法同傳統bp演算法的預測偏差平方和進行比較，結果證實網路的逼近精度及泛化能力均得到了極大的提高和改善。
  14. Moreover, the effects of the system parametric ( such as baseline length, time measure error, sound velocity fluctuate and buoys errors ) on localization accuracy are studied. the laws of the bistatic tol and bol localization algorithm are obtained

    同時，通過對各種系統因素，如基線長度、系統測量誤差、聲速波動、浮標偏移等參數對演算法性能影響的分析，得出了採用tol和bol方法進行定位時，定位誤差的分佈規律。
  15. After analyzing and studying the characteristics of the sequence generation of grey system theory, this paper proposes the concept of three - dimensional data sequence, extends the grey system theory from one - dimensional data sequence to three - dimensional data sequence and enlarges the application range of the theory in engineering. this paper also proposes a decomposition coefficient selection method and a partial concave - convex characteristic decision method to the preference generation, which can solve the problem that the internal point generated by the original method was inconsistent with the actual system. considering the errors existed in ends generation with step ratio and smooth ratio methods, the author proposes a tendency average generation and improves the quality of the generation greatly

    灰色建模與逆向工程兩者有其十分相似的內在關系，本文通過學科交叉，深入研究兩種不同學科理論，在繼承灰色系統理論這一我國原創性理論思想的基礎上，補充和豐富了新的內涵並將其滲透到逆向工程中的數據測量與數據處理技術的應用之中，使機械工程中甚少應用的這一灰色系統理論得到了進一步的拓展，主要成果如下: 1 .分析研究了灰色系統理論中序列生成的特點，提出了三維數據序列的概念，將灰理論的一維數據序列拓展到三維數據序列，拓寬了灰理論在工程中的應用范圍;提出了有偏生成演算法中生成系數分解選取方法和數據序列點局部凹凸特性決定生成系數的方法，解決了原有方法生成內點與實際系統不一致的現象;針對級比和光滑比用於生成端點有較大誤差的情況，提出了趨勢均值生成演算法，大大提高了端點生成的精度。
  16. This algorithm improves confidence in se by estimating parameters and states at the same time. simulation results on test power systems which range in size from 4 to 118 buses, have shown the virtues as follows : getting unbiased estimation without detecting and identifying bad data in measurements ; solving state and parameter estimation for power system with good convergence and excellent robust property ; increasing the numbers of iterations a little bit with the test systems expanded ; estimating many transformer taps simultaneously and remaining the main state estimation ; keeping the estimated relative error within + 0. 1 % and processing efficiently equality constraints and ill condition with polynomial complexity

    對ieee ? 4 118節點系統和廣西主網進行的模擬結果表明： l1范數估計具有不良數據拒絕特性，當量測量中存在不良數據時，該演算法在不經檢測和辨識不良數據情況下仍是無偏估計，具有良好收斂性，所需迭代次數隨著問題規模擴大而增長極小；能夠同時估計多個變壓器抽頭，並保持狀態估計主體；在滿足可觀測性條件下，估計的相對誤差保證在0 . 1以內；能夠有效處理等式約束和病態條件，並具有多項式時間性。
  17. Secondly, the performance of the acousto - optic steering system is deteriorated as a result of the coupling because of nonlinear of quadrant detector and the pointing error introduced by satellite platform vibration. for this problem, this paper introduces the model reference adaptive control system, and presents the perfect model. the model reference adaptive controller is designed to force the output of the acousto - optic steering system following the output of the perfect model to improve the system performance

    其次，針對聲光偏轉系統由於器件的非線性造成的耦合和平臺振動造成的指向誤差導致系統性能惡化問題，引入了模型參考自適應控制系統，提出了理想的模型，設計了模型參考自適應控制器，強迫性能惡化的聲光偏轉系統的輸出跟隨理想模型的輸出，使其性能改善，利用超穩定性理論確定自適應參數以保證系統的穩定性。
  18. This fuzzy controller can implement real - time regulation of the motor ' s rotational speed in light of the position error and its variable rate, therefore, the system can run in the direction of cutting down the position error with maximum speed when the system is under the condition of a higher position error. when the error is slight, the fuzzy controller also can reduce the motor ' s rotational speed gradually, thus the precision of the system will play a dominant role, which can create good conditions for an accurate stop when the position error diminished

    模糊控制器可以根據位置誤差的大小以及位置誤差變化率的大小，實時的調節電動機的轉速，使系統在大的位置偏差的情況下能夠以最快的速度向著減小位置誤差的方向運行，在小誤差的情況下，能夠使電機的運行速度逐漸減小，使系統控制的精確性佔主導地位，為位置誤差等於零的時候能夠做到準確迅速的停車創造條件。
  19. As a new kind of piezoelectricity macromolecule material, pvdf ( polyvinylidene fluoride ) has not only lower density, but also better piezoelectricity, good mechanical performance and plasticity. when a particular shaped pvdf film is used as an error sensor and is bonded to the surface of the measured structure, there will be little effect on the system

    由於pvdf （ polyvinylidenefluoride聚偏氟乙烯）是一種新型的壓電高分子材料，它不僅密度低，而且具有較強的壓電性，機械性、可塑性好等特點。用特定形狀的pvdf薄膜作為誤差傳感器，將它貼在結構體表面上時，對系統產生很小的影響。
  20. The measuring system to measure the dimensional rotation errors of the namcs is configured. the principium experiment verified this method. 3

    將相位偏移干涉測量技術應用於測量與校準系統運動轉角誤差測量，初步試驗驗證了該方法的可行性。
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