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direct calculation     
相关语句
  直接计算
     Direct Calculation of Pressure by Lattice Boltzmann Model
     直接计算压力场的Lattice Boltzmann模型
短句来源
     A pressure-velocity correction algorithm (SIMPLE-C , Semi-Implicit Method for Pressure Linked Equation-Consistent) is adopted in the direct calculation of all the physical variables.
     采用压力—速度修正算法(SIMPLE-C,Semi-Implic it Method for Pressure Linked Equation-Consistent)直接计算全部物理变量。
短句来源
     By way of direct calculation, a sixteen dimension representation space was reducted in terms of group S_4 and group SU_2. This space was obtained by four direct products of the foundation representation space of group SU_2. The basic fundations of the irreducible represen- tation of group S_4 and group SU_2 were figured out.
     本文用直接计算的方法,对由SU_2群的基础表示空间四次直乘得到的十六维空间分别按S_4和SU_2进行约化,并求出荷载S_4和SU_2不可约表示的基函数。
短句来源
     Based on the theory of anisotropic deflection of strata, a mathematical expression F_1=1/2h sin 2(β-α)·p is derived for the direct calculation of the deflection force of strata.
     本文根据地层各向异性造斜理论,推导了地层造斜力的直接计算模式F_1=(1/2)hsin2(β-α)·Ρ.
短句来源
     Physical Significance Interpretation of Plane Coordinate Conversion and Direct Calculation of Conversion Parameter
     平面坐标转换物理意义解释和转换参数直接计算
短句来源
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  直接计算法
     Direct calculation for fatigue strength analysis of ship structures
     船体结构疲劳强度分析直接计算法
短句来源
     The Direct Calculation Method of Catamaran Structure Strength
     双体船船体结构强度的直接计算法
短句来源
     The Determination of Vertical Wave Bending Moment in Direct Calculation of Method of Ship Structure
     船体结构直接计算法中垂向波浪弯矩的确定
短句来源
     Direct Calculation of the Botlom Surface of Independent Foundation at Column Foot
     柱下单独基础底边尺寸的直接计算法
短句来源
     Direct Calculation of the Minimum Thickness of Cushion with Filling Replacement
     换填法垫层最小厚度的直接计算法
短句来源
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  直接算法
     Direct Calculation of Section Design on Welding H-shaped Section Steel Axial-compressed Member
     焊接工字形钢轴压构件截面设计的直接算法
短句来源
     Direct Calculation of Rational Width of Strip Foundation
     确定条形基础合理宽度的直接算法
短句来源
     A direct calculation method for determining the arbitrary added stakes on the transition curve is deduced in the paper, in which the corresponding transition curve length of the stake is directly calculated from the coordinates of the added stake and other parameters can be calculated therefrom.
     该文推导了一种确定缓和曲线任意加桩的直接算法 ,由加桩点坐标直接求解其所对应的缓和曲线曲线长 ,再由此计算所需要的各项数据。
短句来源
     The constrained matrix equation problems have been widely used in many fields such as control theory, vibration theory, system parameters identification, nonlinear programming and so on. In this paper, we will systematically study several kinds of constrained matrix equation problems from different aspects: recursive algorithm and direct calculation method by using singular value decomposition, the canonical singular value decomposition and the generalized singular value decomposition of matrices.
     约束矩阵方程问题广泛应用于自动控制、振动理论、系统参数识别以及非线性规划等领域,本文分别从递推算法以及利用奇异值分解、标准相关分解和广义奇异值分解的直接算法两个不同角度系统地研究几类约束矩阵方程的求解问题:
短句来源
     Direct Calculation on Designing the Section of a H-Shaped and One-Way Bent Member
     工字形单向压弯构件截面设计的直接算法
短句来源
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  正演计算
     Considering the influence of the topography, the authors analyzed in detail the geoelectric section model and made CSAMT two-dimensional inversion for the direct calculation data of the model. The result is basically consistent with the shape of the direct model. The electric section obtained can satisfactorily reflect the underground geological structure and accord with the geological data.
     复杂地形严重地影响可控源音频大地电磁测深(CSAMT)的解释结果,为此,笔者考虑了地形的影响,将地电断面模型经过精细剖分,对模型正演计算的数据进行CSAMT二维反演,得出的结果与正演模型的形态基本一致,获得的电性断面能很好地反映地下地质结构,与实际地质资料相吻合,证实了该方法的正确性和有效性。
短句来源
     It takes advantage of the reverse projection technique of seismic wave and electromagnetic wave, and applies the reverse projection of resistivity combined with the utilization of routine algorithm (conductive center method for direct calculation and nonlinear least squares method for inverse revision)so as to carry out the reconstriction of two-dimensional resistivity image.
     介绍了电阻率成像的几种供收方式,借鉴地震波和电磁波的反投影技术,应用电阻率反投影并联合使用常规算法,即导电α中心法作正演计算、非线性最小二乘法作反演修改,从而进行二维电阻率的图像重建。
短句来源

 

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  direct calculation
Together with traditional maximization of the Lundberg characteristic coefficient R is considered the problem of direct calculation of insurer's ruin probability ?r (x) as an initial-capital function x under the prescribed level of net-retention r.
      
With the use of dispersion forces as an example, it is demonstrated by direct calculation that a correction to the Gibbs formula for the variations of surface tension can be substantial for nanoparticles that approach molecular sizes.
      
A high-speed precision digital phase meter with direct calculation of the signal phase
      
The AD mutation rate was estimated by direct calculation.
      
The method is based on direct calculation of the dynamics of photosynthate accumulation and absorption rates of nitrogen compounds in the plant root system.
      
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Aerodynamic design of a transonic axial-flow compressor for research purpose has been completed based on Wu's three-dimensional flow theory in turbomachines. Through 5 cycles of iteration between inverse calculations on a single mean S2 stream surface and direct calculations on a family of S1 surfaces of revolution, final convergent solution of the three-dimensional flow is reached. It implies that the coincidence of corresponding streamlines on the two kinds of stream surfaces and approximate equality...

Aerodynamic design of a transonic axial-flow compressor for research purpose has been completed based on Wu's three-dimensional flow theory in turbomachines. Through 5 cycles of iteration between inverse calculations on a single mean S2 stream surface and direct calculations on a family of S1 surfaces of revolution, final convergent solution of the three-dimensional flow is reached. It implies that the coincidence of corresponding streamlines on the two kinds of stream surfaces and approximate equality of parameters on them, such as Vθγ, △s/R and thickness of the stream surfaces. At the same time, the flow passage and the blade airfoil meeting all design criteria are determined. The flow field analysis of supersonic sections has shown that parameters such as Vor, As/R etc. all undergo a sudden jump through the shock.

基于吴仲华的三元流动理论,完成了单级跨声速轴流式研究压气机的气动热力学设计.经过两类流面的五轮迭代计算,S_1迥转面上的中心流线与中心S_2流面上相应流线的形状基本重合,其上参数如V_(θr)、△_s/R和流片厚度等大致相等,获得了三元流场的收敛解,同时也确定了满足各项设计判断准则及所需流量的流道和叶型.对超声速进气截面的流场分析表明,由于通道激波的滞止作用,波后的V_(θr)、△_s/R等量都发生了突跃.

A recent paper by C. H. Henry and D. V. Lang claims that the adiabetic ap-proximation breaks down in the neighbourhood of the intersection of the adiabaticpotential curves for the two electronic states,between which multiphonon transitionsoccur.It is shown that their claim is not justified;what they consider to be thesign of failure of the adiabatic approximation is no more than an indication of thefact that owing to the uncertainty principle,there is a finite neighbourhood aroundthe above mentioned point of...

A recent paper by C. H. Henry and D. V. Lang claims that the adiabetic ap-proximation breaks down in the neighbourhood of the intersection of the adiabaticpotential curves for the two electronic states,between which multiphonon transitionsoccur.It is shown that their claim is not justified;what they consider to be thesign of failure of the adiabatic approximation is no more than an indication of thefact that owing to the uncertainty principle,there is a finite neighbourhood aroundthe above mentioned point of intersection,throughont which multi-phonon transi-tions can occur.Direct calculation of the multi-phonon transition probability onthe basis of the adiabatic approximation gives in fact a result identical with theresult obtained with their version of the theory.Further discussions contend thatin more general situations Henry and Lang's formulation of the theory will nolonger be applicable and a proper adiabatic approximation treatment by first liftingthe degeneracy at the intersection point will be necessary.

最近,C.H.Henry和 D.V.Lang发表的一文中声称,在发生多声子跃迁的两个电子态的绝热势能位形曲线的交点附近,绝热近似不再适用.本文指出,他们的论断所依据的现象实际上只是反映了在上述交点附近,由于测不准关系,有一个小区域可以发生多声子跃迁,而丝毫不说明绝热近似失效.本文以绝热近似为基础计算出的多声子跃迁几率实际上和他们所采用的理论方法给出的结果完全相同.进一步的讨论表明,对于更普遍的情形,他们的方法将不再适用,而必须采用绝热近似,解决消除在上述交点处两个态的简并问题.

The calculation of the cyclic convolution and noncyclic convolution are widely used in both general-purpose computers and specially constructed digital processing devices. Howover, the direct calculation of them requires a lot of multiplications and additions, the number of which is proportional to N~2 for large N. In general, they are computed by transform method having CCP. In 1971 and 1975, Cook-Toom and Winograd introduced separately a new algorithm of computation of them. Computation of {w_i} only...

The calculation of the cyclic convolution and noncyclic convolution are widely used in both general-purpose computers and specially constructed digital processing devices. Howover, the direct calculation of them requires a lot of multiplications and additions, the number of which is proportional to N~2 for large N. In general, they are computed by transform method having CCP. In 1971 and 1975, Cook-Toom and Winograd introduced separately a new algorithm of computation of them. Computation of {w_i} only requires 2N-1 multiplications by Cook-Toom's method. Computation of {y_i} Only requires 2N-K multiplications by Winograd's method, where K is the number of divisors of N, including 1 and N. In this paper, first, we introduced a new method of computation for short convolution. This method is an improvement on Cook-Toom's method, morever, it is simpler to calculate than latter. The number of multiplication by this method is also 2N-1. Then, we discussed in general sence the condition of rectangular transform y=C{(Ah)(?)(Bx)} having CCP, and using this condition showed that DFT and NTT had CCP. In the square transform case, when futher restrictions are placed on the matrices A,B and C, we established a necessary and sufficient condition, which any square transform having CCP must satisfy. At the same time, we showed thai matrix A had inverse matrix A~(-1), and the form of A~(-1) was given. At last, we extended above results to intagral ring Z_p, and established a very general form of invertible transform having CCP in Z_p.

本文提出了一个计算卷积的新方法,它是Cook-Toom法的改进,但比后者简便,且可利用已知短卷积的结果,所需乘法次数与Cook-Toom一样为2N-1;然后一般地讨论了矩形变换y=C{(Ah)(?)(Bx)}具有CCP的条件,并且用此条件证明DFT及NTT具有CCP;再给矩形变换更多的限制,证明了变换A具有CCP的充要条件,并证明了这时必有逆,同时给出了逆的形式;最后将上面讨论的结果推广到整数环Z_p中去,得出了Z_p中具有CCP的可逆变换的一般形式。

 
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