轉象誤差 的英文怎麼說
中文拼音 [zhuǎnxiàngwùchā]
轉象誤差
英文
quadrature error-
Aiming at the study actuality of fan performance monitoring system and analysis of fan performance curve changes affected by inlet - box and the different fixed - angles of guide blades in the course of installation, a fan flow monitoring model based on rbfnn in whole flow zone was established in this thesis. in the model, the method of no throttle and fan performance curve were used as basis. and on the basis of that model, fan performance curves of 4 - 73no. 8d were approached with experimental data of different speed, different opening - angles of guide blade and different resistance of pipeline, the precision and the error law of model were studied
本文針對電站風機性能監測系統研究較少的現狀，在實驗的基礎上分析了現場加裝進氣箱和由於安裝造成的導流器葉片開度不一致對風機性能曲線的影響，並在此基礎上採用無節流方法測量流量，以風機調節性能曲線為依據，建立了基於徑向基函數（ rbf ）神經網路的風機流量全程監測模型；以實驗室4 - 73no . 8d離心風機為研究對象，探討了rbf神經網路差壓模型在變轉速、變導流器開度和變管網阻力等工況下的應用精度和誤差分佈規律；最後用visualc + +語言開發了風機性能在線監測系統。Meanwhile it retains evenness on lift force to prevent leakage of residue that is caused by installation clearance error or changes in welding criteria, flow off molten iron as well as break - over welding, so that the ideal fosion depth and finishment have been fulfilled
在需原動力的條件下，該機利用彈性夾角變化，隨著筒體轉動，使墊層焊劑始終緊貼筒體外側環向焊接區，並保持托力均勻防止因裝配間隙誤差或焊接規范變化而引起漏渣，鐵水下淌及焊穿現象，達到理想的熔深度和光潔度。In practice, it ’ s very hard to find any ideal scatter points to track, so this thesis focuses on the motion compensation algorithm base on motion parameters estimation, which is used in r - d fft imaging algorithm and verified by simulation. work of this thesis contains : first analyze the signal - processing model of isar system in detail, and establish a 3 - dimensional mathematical scattering model of moving target. then some improvements are made on existing compensation algorithm, to get a higher image quality and reduce compute burden
本論文有以下幾點創新: 1 .在距離向的補償（包絡對齊）方面，採用基準相關法代替相鄰相關法或積累相關法，一定程度上解決了可能出現的包絡漂移和包絡突跳現象;根據目標運動軌跡特點，採用二次曲線擬合的方法，將包絡對齊時的局部誤差轉化為全局的誤差，以便實現較優的整體對齊效果。There are many problems in dividend distribution of listed companies in china : an obvious tendency of abusing dividend signal, dividend policy being discontinuous and unstable, a general phenomenon to distribute little and non - distribution. dividend plan is often accompanied by capital stock expansion such as share allocation and capitalization of share premium. list company usually mistakes allocation dividend distribution, highly encloses money under the pretence of it
目前，我國上市公司股利分配存在的問題主要包括：上市公司濫用股利信號，股利政策缺乏連續性和穩定性；上市公司存在不分配或少分配股利現象；股利分配方案往往伴隨著配股，轉增資本等股本擴張行為；誤將配股作為股利分配，以此為幌子大把圈錢；違反同股同權、同股同利的原則，有失公平；股權結構的差異和股本規模的不同形成股利分配的差異，等等。The constitutions and principles of position of gps > glonass and beidou navigation system are described all around in this article, and the following technologies are studied and realized : communication between com ports with oop technology, compound navigation with gps and glonass. calculate velocity, pseudorange difference, smoothing pseudorange with the carrier - phase and models to correct error are also done ; the transforms between wgs - 84 and pz - 90, as well as wgs - 84 and beijing54 coordinate system ; the technologies to display and manage bitmap, vector map based on mapx also ; conversion of data formats between gjb and mif data format of maplnfo corp. arithmetic of creation dem data based on contour line data from 1 -. 25000 map data with gjb format. texture the surface of terrains with corrected aviation image
本文全面介紹了gps 、 glonass 、北斗導航系統的組成、定位原理，研究並實現了面向對象的串口通信技術、 gps + glonass組合導航、測速及偽距差分、相位平滑偽距差分以及有關誤差的模型改正、 wgs ? 84和pz ? 90 、 wgs ? 84和北京54坐標系的坐標轉換、柵格地圖的顯示和管理、基於mapx的矢量地圖的顯示和管理、 1 : 25萬軍標數據和mapinfo的mif數據格式雙向轉換、基於軍標數據的dem生成演算法、基於opengl的三維地形構造、航空圖像紋理地形表面、三維坐標量算、虛擬現實模擬導航、三維地形的層次細化演算法以及數字圖像處理中的圖像增強、幾何變換、影像匹配等技術。The attitude algorithm of ship strapdown inertial navigation system under the condi - tion of swaying motion is studied. the cause of the noncommutativity error is also analysed, and the rotation vector is presented to decrease the error. the simulation results indicate that the rotation vector can greatly increase the attitude accuracy
以船舶為對象，研究了搖擺運動下的捷聯慣導姿態解算問題，分析了不可交換性誤差產生的原因，提出了消除該誤差的等效旋轉矢量方法.模擬結果表明，等效旋轉矢量方法提高了導航精度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。Taking no account of the non - uniformity of the detector, this paper analyzed the performance of the traditional four - quadrant angle - measurement algorithm and two other algorithms in calculating the pitch angle and the deflection angle of the incident ray, and also compared the error curve of the pitch angle calculated by each algorithm in the full plane
摘要在不考慮探測器非均勻性影響的情況下，本文分析了傳統四象限測角演算法和另外幾種演算法在計算入射光的俯仰角和偏轉角時的性能，還比較了在整個平面內各個演算法得到的俯仰角的誤差曲面。Abstract : in view of the general phenomena of insufficient resource utilization and inefficient unit operation, an optimal method of power plant economic operation which is fit for the operation characteristic of the small hydropower station has been presented in this paper. on the basis of actual power features of units, this method avoid errors for curve transformation and imitation as well as bring the indefinite factor arising from different combination way of diversion and tail - race system of hydropower station. it makes the calculation result more accurate and reliable. proved by practical application of the hydropower station, this method not only improves the technique content of hydropower station manage, but also promotes clearly economic benefit
文摘:針對目前已建成的小型水電站資源利用不充分，機組總體效率較低的現象，提出了一種適合小型水電站運行特點的廠內經濟運行優化方法，該方法以機組的實際動力特性為依據，既避免了由於曲線轉換和擬合帶來的誤差，又可以將電站引水系統和尾水系統由於不同組合方式所出現的不確定因素納入優化設計之中，使計算結果更加準確可靠.經實際電站的應用表明，該方法不僅可以提高電站管理的技術含量，而且使電站的經濟效益有明顯的提高Then the author analyzed the three - axis position servo system, deduced the transfer function. in order to know what affect the steady precision and static precision the author made a detailed analysis about them. then the author put forward the measure which can improve the steady precision and static precision
以位置控制的電機帶載伺服系統為研究對象，建立三軸電動測試轉臺的數學模型並進行理論分析，求出開環傳遞函數，對系統的穩態精度和靜態誤差進行分析，找出影響因素及提高措施。On the basis of previous work, we developed a new data processing system by use of dsp & oop. the new system overcame the problems existed in the old data processing system successfully, such as the bug which cause program dead loop when the data is too long, and the frequency leak due to principle limit of fft filter. in addition, we eliminated the measurement error brought on by phase warp
我們在前人的工作基礎上，利用現代數字信號處理技術和面向對象的軟體開發技術，統一了彈上黑匣子數據處理系統的操作平臺，完善了轉速、掃描角測試數據處理系統，修正了原有處理程序中的因數據長度過長而導致程序死鎖的bug ；利用有限沖擊響應（ fir ）濾波器，在濾去噪聲的同時，有效地解決了矩形窗fft濾波的頻譜泄漏問題；另外還解決了因相位偏差而導致的測試誤差。分享友人