矩估計式 的英文怎麼說

中文拼音 [jǔgūjìshì]
矩估計式 英文
moments estimator
  • 矩 : 名詞1. （畫直角或正方形、矩形用的曲尺） carpenter's square; square2. （法度; 規則） rules; regulations 3. [物理學] moment
  • 估 : 估構詞成分。
  • 計 : Ⅰ動詞1 （計算） count; compute; calculate; number 2 （設想; 打算） plan; plot Ⅱ名詞1 （測量或計算...
  • 式 : 名詞1 （樣式） type; style 2 （格式） pattern; form 3 （儀式; 典禮） ceremony; ritual 4 （自然科...
  • 估計 : estimate; evaluate; take stock of; size up; calculate; appraise; reckon; estimation; forecast
  1. And the system can be expressed with damage matrixes, which forms a clear and intact dendriform damage evaluated method, offering a practical basis of quantization for seismic design, seismic reinforcement and repair of buildings after earthquakes

    該體系可用矩陣形式表示，總體上形成了層次分明、分支完整的樹狀評估體系，可以為抗震設計、抗震加固和震后維修提供明確實用的量化依據。
  2. The representative failure models of arch rib are searched and the rib section resistances are calculated by incremental method and disadvantage loading in the control sections. the structure reliability assessment index on bearing capacity of the arch - bridge is calculated by the function of bearing capacity reliability, structure resistance probability model, load action effect probability model and jc method

    對每種荷載布置型式，採用荷載增量法進行拱橋結構失效模式的尋找和截面抗力的計算，給出其承載力可靠度功能函數，推導功能函數中結構抗力和作用效應概率模型，並利用改進的一次二階矩法計算在用拱橋承載力可靠度指標評估值。
  3. First, some inequalities of gram determinant and further, some estimates for correlation coefficient of a system of random vectors and its subsystems are obtained

    本文首先給出了矩陣行列式的幾個不等式，進一步，給出了多組隨機變量及其子系統的相關度量的幾個估計
  4. Based on the theory of safety evaluation and risk assessment, this paper first ascertained the evaluating indices affecting ships ' seaworthiness and classified them according to their importance degrees by experts investigation, and used judgment matrix method to calculate weight of the evaluating indices, and then got the membership function by fuzzy collection theory, and finally established the mathematical model to realize a fuzzy comprehensive evaluation to ships ' seaworthiness

    摘要根據安全評價理論、風險評估理論，通過專家調查方式確定影響船舶適航性的評價指標並按照重要程度進行分類，然後採用判斷矩陣法計算評價指標的權重，運用模糊集合理論確定隸屬函數，進而建立數學模型，實現對船舶適航性的模糊綜合評價。
  5. With this understanding, this paper chooses the longitudinal strength of hull girder as the disabled mode, by the calculation of fpso, predicts the ultimate strength and effective lifetime of the hull. expected results of examples are obtained, which provide the analysis data for the further risk assessment

    在此前提下，本文選擇了船體梁縱向強度失效模式，通過fpso實船計算，分析消化了理想單元法程序軟體，預報了船舶極限強度和安全有效壽命期，並用一階二次矩方法對完整受損船體的結構安全性進行了可靠性的評估，取得了預想的結果，為進一步實施綜合安全評估提供了分析數據。
  6. To directly estimate the life of this kind of motor, and to design a orbit curve with the longest life at same condition, this paper gives theoretic research of the equal contact stress inner curve of radial piston motor. the research is divided into four parts : 1 ) taken all forces the piston endured into consideration when radial piston motor working, the force between roller ( or ball ) and orbit is deduced. the simple style of the press expression can be confirmed by ignoring minor influence factors after analysis all factors that will influence this press

    靜壓傳動技術在各類工程機械中得到廣泛的應用，對作為其核心部件的徑向柱塞式低速大扭矩液壓馬達的研究顯得十分重要，為了能直接對這種馬達進行壽命估計，並能在相同工況下求得壽命最長的軌道曲線，本文從設計等接觸應力內曲線的角度對這類馬達作探討性的研究，主要從以下四個方面進行： （ 1 ）綜合考慮徑向柱塞式液壓馬達工作時的各種主要受力狀況，對柱塞組件進行受力分析，並通過模擬分析影響軌道和滾動體間正壓力的各個因素，得到正壓力的簡化表達式。
  7. In order to develop these analytical models into practically applicable forms, the forth order momentum of jons wap spectrum is estimated using the time - averaging technique ( glazman 1986 )

    為獲得便於應用的模式，本文採用glazman （ 1986 ）滑動平均方法估計海浪譜矩。
  8. Aim at the dtc ' s blemish mentioned above and the direction of dtc technique development, the dissertation put great emphasis on the work as follows, with an eye to exalt dtc system function : ( 1 ) a new speed - flux observer of an induction motor is proposed to enhance the accuracy of flux observing, which is an adaptive closed - loop flux observer and different from the traditions. a new adaptive speed - observation - way is deduced out according to the popov ' s stability theories ; ( 2 ) to improve the performance of dtc at low speed operation, we have to exalt the accuracy of the stator flux estimation and a new way of bp neural network based on extended pidbp algorithm is given to estimate and tune the stator resistance of an induction motor to increase the accuracy of the stator flux estimation ; ( 3 ) digital signal processor is adopted to realize digital control. an device of direct torque control system is designed for experiment using tms320lf2407 chip produced by ti company ; ( 4 ) bring up a distributed direct torque control system based on sercos bus, sercos stand for serial real time communication system agreement which is most in keeping with synchronous with moderate motor control ; ( 5 ) the basic design frame of the hardware and software of the whole control system is given here and some concrete problem in the experiments is described here in detail

    針對上面提到的直接轉矩控制的缺陷和未來直接轉矩控制技術發展方向，本論文重點做了以下幾個方面的工作，目的在於提高dtc系統的綜合性能： （ 1 ）提出一種新型的速度磁鏈觀測器，新型的速度磁鏈觀測器採用自適應閉環磁鏈觀測器代替傳統的積分器從而提高磁鏈觀測的精度，並且根據popov超穩定性理論推導出轉速的新型自適應收斂律； （ 2 ）改善系統的低速運行性能，主要從提高低速時對定子磁鏈的估計精度入手，提出了一種提高定子磁鏈觀測精度的新思路? ?利用基於bp網路增廣pidbp學習演算法來實時在線地修正定子電阻參數； （ 3 ）採用數字信號處理器dsp實現系統全數字化硬體控制，結合ti公司生產的tms320lf2407晶元，設計了直接轉矩控制系統的實驗裝置； （ 4 ）提出了基於sercos總線網路化分散式的直接轉矩控制系統， sercos （ serialrealtimecommunicationsystem ）是目前最適合同步和協調控制的串列實時通信協議； （ 5 ）基本勾勒出整個控制系統的硬體和軟體設計基本框架，詳細描述一些實驗中的具體的細節問題。
  9. We discuss the connection between the accuracy of approximate matrix and the degree of interpolating polynomials and study the method of estimating the accuracy of the numerical solution

    我們討論了近似矩陣的精度與插值多項式的階數的關系，討論了近似解的精度的估計方法。
  10. Stochastic subspace identification method is the major in this article, and this method is based on the theory of projection of row space, and also uses qr decomposition, svd decomposition as well as least squares estimate to state space matrices of the discrete system so as to achieve the parameters of the dynamic behavior and it can achieve an accurate result

    隨機子空間法是本文的論述重點，它運用了行空間投影的理論，通過qr分解和svd分解以及最小二乘估計來識別離散后的系統狀態空間矩陣，從而得到系統的動力學特性參數，識別精度較高。本文詳細的推導了隨機子空間法的理論公式，並編寫出相應的matlab程序。
  11. Using the approximation form of lumped mass matrix instead of the mass matrix in finite element discretization in space, backward differencing scheme in time, an implicit computational scheme is yielded, it proved the convergence estimate for this implicit scheme

    對有限元離散中引起較大誤差的質量矩陣，採用了近似形式的集總質量矩陣來代替，時間項採用向後差分，得到了一個隱式的計算格式，證明了計算格式的收斂性及其收斂速度估計。
  12. A estimate for determinants of - diagonally dominant matrices

    對角占優矩陣的行列式估計
  13. Meanwhile, the key research topics are focused on how to reduce the differential settlement between the main tall building and the anex on soft ground, where to set the post - cast strip, and what cause the smart change of the internal force of plate under the core canister of tall building. an experiential equation for estimating the maximum moment of plate is advanced. a method for calculating the range and the thickness of the local enganced plate and another experiential equatio n for estimating the increment of maximum moment of the local plate are also suggested

    同時著重就軟弱地基中減小高層建築主裙房之間沉降差異的措施、施工后澆帶的設置位置，以及高層建築核心簡體下筏板內力變化劇烈等問題展開了分析，提出了筏板最大彎矩估算值的經驗公式，獲得了簡體下局部筏板加厚處加厚范圍及加厚厚度的取值方法及加厚處最大彎距增幅估算值的經驗公式，為今後設計同一類型高層建築提供一些借鑒。
  14. Based on a theorem, the paper discusses the estimates of eigenvalues for a few special matrixes and presents a few relations of the eigenvalues for a set of general special matrix, aswell as their proofs

    摘要本文在定理的基礎上討論幾個特殊矩陣特徵值的估計，並給出一組一般矩陣特徵值的幾個關系式及證明。
  15. In this paper, based on wu ' s method and the estimation for maximal and minimal polynomials, we extend the real root isolation algorithm from univariant integral polynomial to multivariant integral polynomial systems. it gives the solutions of polynomial systems in the form of multi - dimensional boxes

    我們利用吳方法和極大，極小多項式估計，推廣多項式實根分離演算法（ realrootisolation ）到多項式組的情形（ mrealrootisolation ） ，該演算法以空間中的矩形區域形式給出了多項式組的實解
  16. And then, adopting the same model, cyclic moment estimation statistic of different orders are constructed respectively, large sample variance expressions of the estimator through theoretic analysis are derived, as well as the constraint relation of estimator performance and noise statistical characteristic. the curve of estimation performance is obtained through monte carlo simulation test, which proves the related conclusion derived

    然後，論文同樣以加性和乘性噪聲聯合干擾下的復諧波信號和復線性調頻信號為觀測模型，分別構造了基於不同階次的循環矩估計量，從理論上推導出了估計量的大樣本方差表達式，分析了估計量性能與噪聲統計特性的約束關系，通過monte - carlo模擬試驗得到了估計性能的曲線，驗證了推導的有關結論。
  17. Some conditions are obtained by using the semigroup theory, the properties of nonnegative matrices and the techniques of inequalities to determine the asymptotically stable region of the equilibrium

    通過半群理論、非負矩陣性質和不等式技巧，得到估計這類方程平衡態漸近穩定域的方法。
  18. In the thesis a new count expression of mesh fractal dimension is introduced, on the basis of it the storage and operation counts of directs solution methods, assembly global stiffness iterative methods and ebe iterative methods have been analyzed and compared, a conclusion has been obtained that the storage and operation counts of direct solution methods is the most, the storage counts of the ebe iterative methods is the least. estimating compute scale for ebe iterative methods at shuguang 2000 parallel computer, it is make out that compute scale is large in the extreme if make the most of the memory of every processor. by analyzing the parallel compute performance of 2d upend - step flow calculation, it is proved that ebe iterative methods can achieve upper speedup rations

    本文還提出了一種網格分維新的計算公式，並基於網格分維對直接解法，組集總剛矩陣的迭代解法和基於ebe的迭代解法等三種方法的存儲量和計算量進行了分析和比較，得出了直接解法無論存儲量和計算量均最大，基於ebe迭代解法存儲量最小的結論；在曙光2000并行機上估計了基於ebe迭代解法的計算規模，說明只要充分利用各處理機的內存，可解問題的規模是非常巨大的；對二維倒臺階流并行計算進行了性能分析，表明基於ebe策略的迭代解法能獲得較高的加速比。
  19. Using lyapunov functional and linear matrix inequality ( lmi ) technique, and through the stability of subsystems decoupled in a single direction, we obtain an estimation formula of parameter ' s stability domain

    再利用標量lyapnov泛函和線性矩陣不等式技術，由單向解耦子系統的穩定性得到線性時滯大系統和非線性大系統參數穩定域的估計公式。
  20. In dtc system, the concept of space vector is introduced to analyze and control the ac motor, the electromagnetic torque and flux are caculated and controlled in the stator reference frame, and the optimal pwm gating signas are generated to control the inverter according to the output of the bang - bang regulator. in this paper, the dtc system is designed based on dsp. a speed estimation method is derived detailedly and the sensorless speed close - loop control is conducted. in this system, there are some problems, such as flux drift and torque ripple. to resolve these problem, a modified flux caculation method and some measures such as speed lpf, torque slide filtering are adopted. the system performance is enhanced by these mersures

    直接轉矩控制採用空間矢量的概念來分析異步電機的數學模型和控制其各物理量，直接在定子坐標系中計算和控制轉矩和磁通，藉助于離散的兩點式調節（ bang - bang控制）產生pwm信號，直接對逆變器的開關狀態進行優化控制，以獲得轉矩的高動態性能。本文採用dsp設計了直接轉矩控制系統，詳細推導了速度估計方法，進行了無速度傳感器的速度閉環控制。
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