過多誤差 的英文怎麼說
中文拼音 [guòduōwùchā]
過多誤差
英文
excessive errors-
Testing on rock sample data in dispersed shaly sands it shows that adding another parameter ( n ) to the model can decrease the relative error of fitted co. however, when we consider the difference of electrical properties between clay - bound water and formation water in the model, although another parameter ( qv ) is added to the model, the relative error of fitted co is increased slightly
通過一組分散泥質砂巖巖樣實驗測量數據的計算。表明模型中增加參數n （ m n ）可以使擬合的c _ t的相對誤差減小，但在考慮粘土結合水與地層水導電性差別時，模型中雖多加一個參數q _ v ，卻沒有減小擬合的c _ t的相對誤差。At first, this paper analyzes the factors of water - sand influencing water level of yellow river and the feasibility just using the factors of water - sand to study water level, and collects the corresponding data ; secondly, because there are strong nonlinear relation in the corresponding data, by meticulous theory analysis, this paper integrates basic nonlinear analysis method, theory of random analysis, method of least squares and so on. it puts forward a method which can get the high accuracy simulation of the data, perfects the multi - factor analysis of variable ( over three factors ) of the statistic ; thirdly, it applies the method to the approximation of corresponding water level process which belong to the capacity of sand of middle - high and middle - low, and get the high - accuracy simulation about the typical nonlinear relation ; at last, this paper definitudes the main influence mode that the capacity of sand. it mainly unite with other factors to work on the water level in the yellow river lower reaches ; mor eover, this paper analyzes the difficult point and the direction of improvement to realize the accuracy forecasting of the flood level of erodible - bed channel
首先，系統分析了影響黃河水位的水沙因素，及僅用水沙因素有效研究水位的可行性，並按變量對應思想採集它們的相應數據；其次，由於相應水位過程數據中含極強的非線性關系，本論文經細致的理論分析，將基本的非線性分析方法、統計建模方法、隨機分析理論、最小均方誤差原則等等數學理論及方法有機揉合，提出了能有效實現這類數據高精度擬合的分層篩選法，並改進了統計學中多因子（三個以上）方差分析法；再次，將這一方法用於黃河中高及中低含沙類洪水相應水位過程的擬合，實現了這一典型非線性關系的高精度擬合，各年汛期上下游相應洪水位過程的擬合誤差都較小；最後，明確黃河下游含沙量對水位的主要影響方式，即含沙量主要是與其它因素聯合對水位作用；另外分析了要實現變動河床洪水位過程準確預報的困難所在及改進方向。The s - l - e experiment data for the eight binary condensed systems of fatty alcohol / fatty acid were treated by using the improved equation, and the equation was examined with experimental data. at the same time, we used ideal model to predict the tenary s - l - e of n - octadecane / lauric acid / stearic acid system, and we got an accurate result of the simple eutectic temperature. the relative error is 0. 51 % comparing with the experimental result, so we will offer a method of prediction for quickly obtaining multicomponent system phase change materials this article calculated the pcms quantities and energy saving effect in theory, designed the experimental apparatus to measure the energy saving effect, and analyzed the temperature equalization action of the pcms by comparing experiment
利用這種方法，建立了適合醇-羧酸等系列二元體系的單參數margules方程，本文對醇-羧酸系列等8個二元凝聚體系的單參數margules方程的參數進行回歸，並利用整個實驗數據對模型進行了檢驗，另外，本文利用理想狀態模型對一個三元體系18烷-月桂酸-硬酯酸相圖進行預測，通過與實驗數據進行比較，預測的低共熔溫度與實驗測定溫度較為吻合，其相對誤差為0 . 51 ，這將為快速獲取多元體系的相變材料提供預測方法。To see what error was engendered in the process, we now allow ni to differ from ne and use the linearized poisson equation.
為了研究在這個過程中引起了多少誤差，我們讓ni與ne不相同，並用線性化的泊松方程。Firstly introduced the basic theory and method with which the analog signal can be convert to digital form, including sampling theory and course, quantification and quantification error, coding, beside those we discussed some applications of sampling technology, the reason of frequency mixture and the method to eliminate it chapter 4 introduced analog mux - switch, for the reason of simpleness we only introduce it briefly
從第3章開始，對數據採集的基本理論進行討論，首先介紹了模擬信號數字化處理中的基本理論、方法，包括采樣過程、采樣定理、量化與量化誤差、編碼，還討論了幾種采樣技術的應用、頻率混淆產生的原因及消除措施。第4章，介紹了模擬多路開關。Aspheric optical compound machine tool ( aocmt ) which integrates grinding, lapping and polishing is developed. the influences of motion errors on grinding accuracy are analyzed. according to homogeneous coordinate transition model, the postposition processing algorithm in multi - axis numerical control machining is deduced
3 、研製了集銑磨成型、研磨、拋光於一體的光學非球面復合加工機床（ aocmt ） ，分析了各種運動誤差對銑磨精度的影響；根據空間齊次坐標的變換模型，推導出多軸數控加工的後置處理演算法；通過五軸數控聯動， aocmt機床能夠以法向方式加工出任意復雜的光學表面，銑磨精度穩定在8 m之內。In collaboration with the department of physicis and material science of the city university of hong kong and the electronic and engineering department of the chinese university, the faculty of medicine has conducted research on different aspects of computer - aided navigation such as brain shift prediction with finite element model, three - dimensional ultrasound based correction for brain shift, accuracy verification, robotic system, surface identification and matching
通過與香港城市大學物理及材料科學系及香港中文大學電子工程學系的協作，我們正發展電腦輔助的神經導航技術的多方面研究，例如，採用有限元模型預測腦偏移；除去腦偏移的誤差的立體超聲檢查技術；手術準確性的證實；腦表面區域的定位。In this paper, taking the measured error sound velocity profile as the initial guess value, the sound beam travel times and beam angle recorded by the multi - beam system and the generalized linear inversion method are used to get a sound velocity profile close to the actual sound velocity profile, and the inversed sound velocity profiles have contributed to the reduction of sound velocity profile error
摘要以測得的誤差聲速剖面作為初始猜測值，利用多波束記錄到的波束傳播時間和波束角等信息，通過廣義線性反演得到一個與實際聲速剖面比較接近的聲速剖面，這有助於減少聲速剖面的誤差。During the instantaneous frequency estimation of lfm, there exists some error in the edge, so in the dissertation, a fitting method is proposed to modify it. from the computer simulation, the following result is obtained : for cw, the method based on cwt is most effective, and with the snr rising, the error curve of it is more and more closer to crb. for lfm, the method based on wvd gives the best result, and the effects of cwt and stft are similar for multi - component signal, compared to stft and wvd, cwt is a better choice
通過模擬發現，在單頻回波的瞬時頻率估計中，基於cwt的方法最為有效，隨著信噪比的提高，其均方誤差曲線越來越接近克拉美?羅界；在線性調頻回波的瞬時頻率估計中， wvd法得到的效果最好，而cwt與stft法的估計效果比較接近；在多分量信號的瞬時頻率估計中，相對于stft和wvd法， cwt法是一個更好的選擇。Since we value the learning effect of neural networks by cumulative error, the paper pay direct attention to it to study the bp algorithm
由於評價人工神經網路最終學習效果是通過累積誤差來進行的，從而我們直接瞄準累積誤差來研究多層人工神經網路快速學習的演算法。Accurate simulation of switch circuit is needed in pin switch design, while limited by assembling techniques, serial resonance and channel inter - coupling exist in the common joint that bring a lot of difficulties for simulation. 2 - dementions simulation software can not establish accurate circuit mode for pin diode switch which gives simulation error, and it costs much more time with 3 - dementation simulation software, which is not applicable in practice for pin switch design
Pin開關的設計中需要對開關電路進行準確模擬，然而高頻、寬帶、多擲pin開關受裝配工藝的限制，開關公共結點附近存在著串聯諧振和相互耦合，給pin開關的準確模擬帶來了困難:二維模擬軟體很難對電路進行準確建模，模擬誤差較大;三維模擬軟體耗時過長，難以在實際設計中應用。Most of error sources can be eliminated by double differencing due to the short antenna seperations within gps based attitude determination system, multipath is the dominant error source
Gps姿態測量中，大部分誤差源可通過雙差得到抑制或降低，多徑誤差成為主要的誤差源。Three amendments are made to neighbor - joining method : first, a more precise evolution model is used to calculate the distance between sequences ; second, sequences are used to generate multiple typological structures, and hence compensate the shortcoming of neighbor - joining method, which can generate only one typological structure ; third, back mechanism is introduces to avoid the negative branch length in distance method and get a more accurate tree
本文對距離法中的鄰接法進行了三點改進: 1 .使用更精確的進化模型來度量序列之間的距離，降低因模型而帶來的誤差; 2 .通過隊列產生多個拓撲結構，解決了鄰接法只能產生一個拓撲結構的缺陷; 3 .引入回退機制，消除了距離法中負枝長的產生，得到的樹更準確。With the experiment part, the errors of sk - 21 nc machine tool have been measured, and a serial of data is gotten which lead to the error discrimination. ( 3 ) based on the kinematical theory of mbs, the calculation methods for the ideal center envelop curve of grinding wheel on cam grinding, the practical cutter track, inverse contour of cam, ideal nc instructions, precision nc instructions, the inner / outer normal and the fitting criterion of curve have been all discussed in detail in this paper
（ 3 ）通過精密加工的約束條件方程，探討理想刀具路線、逆變數控指令與實際刀具軌跡之間的映射關系，解決誤差補償技術提高加工精度的核心問題? ?當要求數控磨床的砂輪中心準確到達給定的理想點時，精密數控指令值究竟該是多少，如何能夠通過計算，獲得這樣的數控指令值，給出經修正的數控指令計算方法。The algorithm and its implementation of the leading zero anticipation are very vital for the performance of a high - speed floating - point adder in today s state of art microprocessor design. unfortunately, in predicting " shift amount " by a conventional lza design, the result could be off by one position. this paper presents a novel parallel error detection algorithm for a general - case lza
目前國際上已有很多演算法對前導0預測演算法進行了研究，但是出於設計方法和延遲等方面的限制，大部分前導0預測演算法都為非精確演算法，其預測結果可能與真實加法結果中前導0的個數產生一位的誤差，這個誤差需要在浮點加法的后規格化過程中進行修正，因此反過來又增加了浮點加減演算法的關鍵路徑延遲。In this paper, the drive theory of the large ratio friction transmission is studied ; a new type elliptical cam wave generator is designed ; the large ratio friction transmission prototype is designed and manufactured ; based on the ansys finite element method software, structure of the elliptical cam is analyzed ; precision index of the manufactured large ratio friction transmission prototype, such as transmission accuracy, least step, stability of the least step, load capacity is measured by the absolute rotary encoder. by analyzing the measurement data and research content, it is think that the new elliptical cam wave generator could overcome a good many problems brought by processing errors, facilitate size precision adjustments, input moment can be achieved in the form of a pure force couple importing ; through this study, " the large ratio friction transmission prototype " could apply in practical engineering basically
本文研究了大速比摩擦傳動的傳動理論;設計了新型橢圓凸輪波發生器，設計製作了大速比摩擦傳動樣機;用軟體ansys對所設計的橢圓凸輪結構進行了有限元分析;用19位絕對式編碼器測試了大速比摩擦傳動機構的傳動精度、最小步距、最小步距的穩定性以及帶負載能力等各項精度指標;對測量數據和研究內容進行了歸納和整理，認為新型橢圓凸輪波發生器克服了加工誤差帶來的諸多問題，新型橢圓凸輪波發生器可以進行尺寸精度調整，能夠達到輸入力矩以純力偶的形式輸入;通過本項研究，基本可以使「大速比摩擦傳動機構」在工程中得以應用。5. a multivariable process identification based on asymptotic black - box theory is studied. firstly, a high - order mimo arx model and its frequency error bound is estimated from identification data and low - order siso models is obtained from high - order mimo arx model
作者對一種基於漸近黑箱理論的多變量過程辨識方法進行了研究：首先用高階arx模型估計模型參數，並給出高階模型的頻域均方誤差；然後，對高階arx模型進行降階處理。By taking advantages of epipolar line features and depth discontinuities in reference 中國科學院 軟件 研究所 博士 學位 論文 基于 圖 象 的 快速 繪制 技術 的 研究 images ， an efficient inverse wmping algorithm is pfoposed in chapter 3 for gcnerating nagcs of novel views by combining multiple eference images 帆 enhm different vie 呷 oints because continuous segnents determi 。 d by pairs ofedge pixels at co 。 spending epipolar lines are order kept ， only pairs of edge pixels in the reference 渝 明 e e necess 叨 口 cowute to obtain generalized disparity of all points in the desired image as a result ， sighficant acceleraion could be made in the endering pfo 比 鴕 two accelerating techiq 此 s e presented in this algori 山 mb accelerate the hole illing process his algorithm extends the reference images rom projection of single col ： ii ’ ected surface in previously developed nvnverse w 出 下 er to ima 驢 s captured rom complex scene in chapter 4 ， an 《 dent ibr method is prese 庇 仙 y takn ull 訕 antage of 呷 bies c 咖 the method can simulate the 3d details on sllri ： ace of object successfully he 。 叩 proach ， called rered ature mopmp consists of two pans at fst ， an origi 。 ltexture with orthogonal displacements per pixel is deco 啊 osed into a series of new t6 刀 mfcs with each 他 lug a given displacement per pixel ， called ae ， ea atures ， or lt hen hese lt e used to render the novel view by conventional texture mapping d avoid gaps n the endered hlla 驢 ， some phels are to be interpolated nd extended in the 廠 kaccoding to the depth differe eee between two neighbor pixels in the original texture as these ltlt fc … e much storage nd therefore much time is equired to install ltlt into the text ’ ufc buffec an 舊 thod is pfoposed to co 呷 fcss the ltlt ， nd the cottcspondingfclldering method is given experimental esults show that the new method is efficient ， especially n rendering those objects with a smaller depth rnge compared withtheir size ， such as relief surfaces of building
與己有的三維變換方法相比較，該方法不但成功地填補了由於投影區域擴張而產生的第一類空洞，而且成功地填補了由於空間深度非連續物體相互遮擋而產生的第二類空洞，從而方便地實現了虛擬環境中的漫遊；基於物體表面深度的連續性，本文提出了一個位移預測方法? ?此方法可以從單幅參考圖象獲得逆映射過程中所需要的目標圖象的位移信息，從而大大提高了演算法的效率：與通常的正向映射演算法相比，此演算法克服了多幅參考圖象所帶來的計算量成倍增長等問題，而且誤差較小。 2 ）基於極線幾何的快速逆映射演算法。利用參考圖象的邊界信息與隱含的遮擋關系，以及極線幾何的性質，本文第三章提出了一個基於極線幾何的快速3 『一中國科學院軟體研究所博士學位論文基於圖象的快速繪制技術的研究逆映射演算法，從多幅參考圖象精確合成當前視點目標圖象。For the existing transformer cooling control system has many shortcomings such as the complicated system control circuit, the low reliability, the protection methods of blower fan being so simple, large control error, high fault rate, massive maintenance work and no method to realize telecommunication, this thesis develops a novel intelligent power transformer air - cooled control system based on the center of microprocessor through all - round technology analysis and research
本文針對變壓器冷卻系統使用常規控制系統存在的系統控制迴路復雜、可靠性低、風機的保護方式簡單而無法進行故障預測、主變壓器油溫測量精度低造成控制誤差大、故障率高、維護工作量大、無法實現遠程通訊等問題，經過多方面的技術分析和調研，設計開發了新型的以微處理器為核心的智能式電力變壓器風冷卻器控制系統。Put forward my proposal about the reformation of the taxation system, as well as the complementary measures, it is the surface that farmers " burden is caused by the primary government who charge farmers excessively, the deep reason is the unbalance developing strategy for national ecnomic and the difference between the city and the rural earea. link theory with the prctising program interal and external, i put forward my proposal to abolish agricultural tax, practice the same taxation, set up land rent system
過分地掘取農業剩餘的同時，還實行重城輕鄉的公共產品分配政策，造成農村財政呈「缺血」狀態，不得已實行「三提五統」收費制來解決農村公共產品的提供問題，制定製度出發點的錯誤以及制度本身的不完善，造成「三亂」久治不愈；其次，由於行政管理體制改革滯后，機構臃腫，冗員過多；再加上農民反負成本高，反負意識差和農村制度供給的路徑依賴性，造成農民負擔越發沉重，並成為中國許多問題的根源。分享友人