inverse field 中文意思是什麼
inverse field
解釋
逆序場-
As we know, inverse techniques make blade ' s profile well compatible with its surface velocity distribution, however, they give designers big challenges that the ideal velocity distribution is hard to obtained and sometimes the non - physical solution, such as double covering of flow field or unclosed profiles, would come out. the proposed design procedure in the paper has avoided the disadvantage mentioned above. in this paper, a quasi - irrotational equation is used to describe the flow in cascade instead of the generally used irrotational equation
眾所周知，一般的反問題和混合問題的最大特點，是在給定的壓力面和吸力面上的壓力分佈或速度分佈條件下，直接得到葉片的幾何形狀，它可以使葉型型面與表面氣流參數有機結起來；其不足之處在於，對設計者而言，很難給定理想的葉片表面壓力分佈或速度分佈，並且有時會得到一個非物理解，如：得出的初始葉型可能會出現前緣、尾緣不封閉的現象。 -
Application improved field elimination method to inverse problem of electromagnetics
應用於電磁場逆問題中的改進區域消除法 -
A sufficient and necessary condition for determining singularity of a block circulant matrix over a quaternion division algebra over a field is given, and two algorithms for the inverse of a nonsingular block circulant matrix over the quaternion division algebra are presented
?給出了域上的塊循環矩陣可逆性的充要條件及其逆矩陣的演算法。 ?給出了四元素可除代數上的塊循環矩陣可逆性的充要條件及其逆矩陣的兩種演算法。 -
( 2 ) taking the geology analysis as main way and combining the pre - test, predicating the tunnel ' s main geology condition ( rock quality, surrounding rock classification, long - wide joint, fault, ground water, crustal stress ), and predicating the main potential disaster ( collapse, breaking water, rockburst, large deformation ) ( 3 ) employing the stress test result and inverse analysis of the stress field, finding out the crustal stress " s distributing rule along the tunnel axes section : the highest crustal stress is 24mpa near the deepest spot, and predicting that the k2 + 260 ~ k3 + 000 likely to be the high crustal stress segment for this tunnel
通過地質分析、類比分析、監控量測、數值模擬、神經網路等方法，對鷓鴣山隧道潛在的主要地質災害（塌方、涌水、巖爆和大變形）進行了預測預報（ 3 ）在現場地應力測試成果的基礎上，運用數值計算進行應力場反演，基本查明了沿隧道軸線剖面的地應力分佈規律：地應力量級在最大埋深附近達到最大值24mpa ，並預測k2 + 260 k3 + 000段將很可能成為鷓鴣山隧道的高地應力段。 （ 4 ）塌方往往與斷層破碎帶及千枚巖相聯系。 -
First, in virtual of identification of flaws is a typical of in - verse problems, proceeding from time - harmonic electromagnetic maxwell ' s equa - tion and helmholtz equation, the uniqueness and existence of direct scattering problems including the numerical algorithms of diverse of boundary conditions is given. second, the uniqueness and existence of inverse scattering problems and the theory of ill - posed integral equation are briefly looked back upon. finally, indicator function method for boundary identification is set up under all kinds of boundary conditions for inverse scattering of homogenous and inhomogenous objects, meanwhile, the proof of possibility for near - field measurements and nu - merical simulation are given
由於缺陷的識別是一類典型的反問題，因而首先從時諧電磁maxwell方程和helmholz方程出發，具體地闡述了求解正散射問題的有關方法，包括各種（夾雜）邊界條件下的數值解法，就解的存在性唯一性給予了肯定的回答；隨后對逆散射問題的理論作了簡短的回顧，包括解的唯一性以及非線性不適定積分方程的處理等；然後對均勻介質和非均勻介質的逆散射問題建立了在各種邊界條件下的邊界識別的指示函數方法，鑒于近場數據獲得的重要性，對近場測試時邊界識別的方法給予了相應的證明，並且實現了數值模擬。 -
In this paper, the common used encoding algorithms and basic finite - field opera - tions algorithms are introduced, and the decoding algorithms such as inverse - free ber - lekamp - massey ( ibm ) algorithm, reformulated inverse - free berlekamp - massey ( ribm ) algorithm and modified euclidean algorithm are analyzed in great detail. based on the ribm algorithm, a modified structure and a pipelined decoder scheme are presented. a tradeoff has been made between the hardware complexities and decoding latency, thus this scheme gains significant improvement in hardware complexity and maximum fre - quency
本文簡要介紹了有限域基本運算的演算法和常用的rs編碼演算法，詳細分析了改進后的euclid演算法和改進后的bm演算法，針對改進后的bm演算法提出了一種流水線結構的譯碼器實現方案並改進了該演算法的實現結構，在譯碼器復雜度和譯碼延時上作了折衷，降低了譯碼器的復雜度並提高了譯碼器的最高工作頻率。 -
Since there exists ill - posedness in reconstructing velocity on the surface and reconstructing pressures in the field, this paper attempts to introduce an iterative regularization method to resolve such inverse problems
由輻射聲壓重構結構表面振動速度和聲場聲壓存在解的離散病態問題，試圖利用一種迭代正則化方法來解決此類逆問題。 -
On the contrary, in - parallel actuated micromanipulators have the advantages of more rigidity and accuracy, higher load capacity, and simple inverse kinematics, therefore they can be used to replace conventional serial ones to meet the rising need for higher precision, they are widely used in automation, communication, mechanics engineering, medicine field and so on
而並聯機構具有運動鏈封閉、剛性好、無關節誤差累積、運動精度高，且運動學逆解求解簡單等優點，因此非常適合於用作微操作執行器機構，廣泛應用於自動化技術、機械製造工程、醫療技術等領域，具有廣闊的發展前景。 -
The inverse problem of finding the displacement field from a strain field is not so simple.
反過來，如果從變應場來尋找位移場，那麼問題就沒有這么簡單。 -
Reseach on maths model of two - dimension vector field reconstruction with inverse projection
反投影重建二維矢量場的一種數學模型研究 -
Macroscale inversion analysis of measured displacements in tunnel, slope and dam is studied detailedly according to inverse formulation method and direct formulation method. aimed at inverse problem for identifying original geostress parameters and stru - ture modulus of rock, linear hypothesis for shear stress field of slope is proposed. structural model of transversely isotropic medium is constructed
針對逆源（初始地應力）和逆介質（巖層結構模量）的識別問題，提出了地層剪應力場的線性假定，構造了橫觀各向同性體的結構性計算模型，應用了逆定式化有限元反演方法，快速地搜索到了被識別參數的最優值。 -
Electromagnetic inverse scattering aims to reconstruct the distribution of the dielectric characteristics of unknown inhomogeneous dielectric object by scattering wave. in the near thirty years, it has been extensively used in military, medical imaging and nondestructive testing field
電磁逆散射（又稱為電磁反演或電磁成像）是對接收到的未知物體的散射信號進行分析處理從而重建未知物體的幾何形狀和內部結構。 -
The main contributions of the second part of this dissertation are focused on the cryptographic properties of logical functions over finite field, with the help of the properties of trace functions, and that of p - polynomials, as well as the permutation theory over finite field : the new definition of chrestenson linear spectrum is given and the relation between the new chrestenson linear spectrum and the chrestenson cyclic spectrum is presented, followed by the inverse formula of logical function over finite field ; the distribution for linear structures of the logical functions over finite field is discussed and the complete construction of logical functions taking on all vectors as linear structures is suggested, which leads to the conception of the extended affine functions over finite field, whose cryptographic properties is similar to that of the affine functions over field gf ( 2 ) and prime field fp ; the relationship between the degeneration of logical functions and the linear structures, the degeneration of logical functions and the support of chrestenson spectrum, as well as the relation between the nonlinearity and the linear structures are discussed ; using the relation of the logical functions over finite field and the vector logical functions over its prime field, we reveal the relationship between the perfect nonlinear functions over finite field and the vector generalized bent functions over its prime field ; the existence or not of the perfect nonlinear functions with any variables over any finite fields is offered, and some methods are proposed to construct the perfect nonlinear functions by using the balanced p - polynomials over finite field
重新定義了有限域上邏輯函數的chrestenson線性譜，考察了新定義的chrestenson線性譜和原來的chrestenson循環譜的關系，並利用一組對偶基給出了有限域上邏輯函數的反演公式；給出了有限域上隨機變量聯合分佈的分解式，並利用隨機變量聯合分佈的分解式對有限域上邏輯函數的密碼性質進行了研究；給出了有限域上邏輯函數與相應素域上向量邏輯函數的關系，探討了它們之間密碼性質的聯系，如平衡性，相關免疫性，擴散性，線性結構以及非線性度等；討論了有限域上邏輯函數各類線性結構之間的關系，並給出了任意點都是線性結構的邏輯函數的全部構造，由此引出了有限域上的「泛仿射函數」的概念；考察了有限域上邏輯函數的退化性與線性結構的關系、退化性與chrestenson譜支集的關系；給出了有限域邏輯函數非線性度的定義，利用有限域上邏輯函數的非線性度與相應素域上向量邏輯函數非線性度的關系，考察了有限域上邏輯函數的非線性度與線性結構的關系；利用有限域上邏輯函數與相信息工程大學博士學位論文應素域上向量邏輯函數的關系，揭示了有限域上的廣義bent函數與相應素域上的廣義bent函數的關系，以及有限域上的完全非線性函數與相應素域上向量廣義bent函數之間的關系;給出了任意有限域上任意。 -
Algorithms for the minimal polynomial and the inverse of a given block symmetric circulant matrix over a group algebra of a finite group over a field are presented. and a method of determining singularity of this block symmetric circulant matrix is given
?給出了求域上有限群的群代數上的塊循環矩陣的極小多項式的演算法，西安電子科技大學博士學位論文:多項式代數及其應用奇異性判別法及其逆矩陣的求法 -
The definition of a mixed block matrix is given, and an algorithm for the inverse of a given mixed block matrix over a group algebra of a finite group over a field is presented, and a method of determining singularity of this mixed block matrix is given
?給出了域上有限群的群代數上的塊對稱循環矩陣的奇異性判別法及其逆矩陣求法. ，定義了域上有限群的群代數上的混合塊矩陣，並給出了它的可逆性的判別法及其逆矩陣的求法 -
Study on inverse problem of electric field for high voltage sf6 arc quenching chamber
6斷路器滅弧室電場逆問題求解研究 -
Some stiffness matrices of special elements such as rubber bearings and components with field are derived from primary - secondary and inverse transform in structural matrix analysis. then, seismic response analytical models and non - isolated continuous rigid frame bridges are set up, while considering the interaction of soil - pile - structure and traveling wave effect simultaneously. finally, the seismic time history response of the two models is calculated by means of the finite element method, and the results show that the isolated bridge posses powerful earthquake resistance
首先論述了公路大跨徑橋梁的地震反應分析方法，其中包括樁-土-結構相互作用、行波效應等因素對結構物的影響；其次，利用結構矩陣分析中的主從變換和逆步變換，推演了幾個特殊單元的剛度矩陣，包括橡膠隔震層單元和帶剛域構件單元；最後，考慮樁-土-結構相互作用和行波效應的結合，分別建立隔震與非隔震連續剛構橋地震反應分析模型，通過有限元法對兩種結構進行時程分析，結果表明：隔震層上部結構的地震加速度反應、位移反應均明顯減小，這說明隔震的連續剛構橋具有很好的抗震能力。 -
In order to improve the prospecting precision to the earth of transient electromagnetic method ( tem ), the idea of tem imaging is proposed according to the characteristics of both electromagnetic wave propagation and response : the wave - impedance is calculated from observed data in - field by the way of inverse - faltung and linear digital filter ; the sequence of reflection coefficients corresponding to every tiny - lever move time is calculated by the way of linear programming, and the imaging result section is drawn consequently
摘要?提高瞬變電磁法的對地探測精度，從瞬變電磁場的傳播特性和電磁響應特性兩個角度?慮，提出了瞬變電磁成像方法：由野外實測磁場感應數據，經過反褶積和線性數字濾波求出波阻抗；用線性規劃法求出每一微層走時所對應的反射系數序列，並以此?參數繪製成像結果圖。 -
Ecc is considered to be an alternative to rsa. this article provides a brief description of rsa public key cryptography and the associated knowledge, in particular introduces non - supersingular elliptic curves e which is established on the finite field fp with p > 3, in - depth studies present existed scalar multiplication, further proposes an improved signed sliding window algorithm on ecc under the mixed coordinates, the improved algorithm compatible the advantage of the naf, has the least number of zero window and avoid a large number of inverse operation, successfully reduce scalar multiplication calculation
本文闡述了橢圓曲線及其相關知識，特別說明了建立在有限域fp （其中p是大於3的素數）上的非奇異橢圓曲線e ，深入研究目前已有的各種標量乘法，由此提出了橢圓曲線密碼演算法在混合坐標下改進的帶符號滑動窗口演算法，該演算法兼容了naf方法的優點，擁有最少數目的非零窗口數，又避免了域元素上的大量求逆運算，較成功地減少了標量乘法計算量。 -
A nonlinear optimization algorithm was proposed for solving the inverse problem of reconstructing the shape of a three dimensional obstacle from the information of the near - field measurements for point source fields
摘要研究了從點源激勵散射場的近場信息來再現三維障礙物形狀的反問題，提出了一種非線性最優化求解方法。
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