查询词典 variational

In this paper, the variational data assimilation of two kinds of physical model including"on-off"...

本文研究了两类含有"开关"的物理过程的变分资料同化问题。

In the third chapter, the concepts of loop circuit and variational geometric constraints network are firstly presented.

本章为下一章的变动几何约束网络理论的建立奠定了坚实的数学基础。

Real estate exploitation is a dynamic process of investment, management and withdrawal, which is executed in a variational market environment.

房地产的开发是一个在不断变换的市场环境下进行投资、开发经营和回收的动态过程。

In order to make use of time-frequency characteristic of signal,a new method of variational estimation on signal frequency by using AR model power spectrum estimation,designing band-pass filter to gain approximatively source signals and underdetermined mixed matrix,and constructing completed observation signals by expanded subspace primer vector is proposed.

充分利用信号的时频特性，提出了AR模型功率谱估计法滑动估计信号频率，设计带通滤波器近似获取源信号和欠定混合矩阵，以及扩展子空间向量基构造完备观测信号的方法，将问题转化为完备情况下的盲分离，最后运用FastICA方法实现了信号盲分离。

The relative variational rate of the volume and shape of particles is 8.4% and 12.5%, and the contribution to integral volume is 1.68% under the general condition.

一般情况下，颗粒的体积和形状的相对变化率分别为8.4%和12.5%，对总体积变化率的贡献为1.68%。

In the multi-purpose environment simulation system, cement mortars that had dipped in Na2SO4 solution of different concentration carry on mass losing, volumetric deformation tests and SEM analysis under invariable temperature and variational humidity.

在多功能环境模拟系统中，对经不同浓度Na2SO4以玉溶液浸泡后的砂浆试件进行了恒温变湿条件下的质量损失、线性收缩测试及SEM分析。

Weak formulation of mixed state equations including boundary conditions are presented in a cylindrical coordinate system by introducing Hellinger_Reissner variational principle.

从Hellinger_Reissner变分原理出发，在柱坐标系中，导出圆柱壳的弱形式混合状态方程和边界条件，联用状态空间法给出叠层柱壳的解析解，此法使得求解该类问题的形式得以扩大和统一。

With the improvement of the structural complication and strength index of the engine structure, during the work process, the bending-shaft produce bent and torsion because of the action of periodicity variational air pressure, inertia pressure evocabled by the to-and-fro and whirligig motion and torque, therefore, engine bending-shaft must be provided with the preferable fatigue intensity and the structure rigidity through making use of the material of high intensity and the reasonable forging technique.

随着发动机结构的复杂化和强化指标的不断提高，曲轴在工作过程中，由于受到周期性变化的气压力、往复和旋转运动引起的惯性力以及弯矩、扭矩的共同作用，既产生弯曲又出现扭转，这就要求发动机曲轴具有高的疲劳强度和结构刚度。

Based on variational principle and split-based interpolation finite element method for fast and accurate analysis of normal mode helical antenna,Combination of genetic algorithm and then load the normal mode helical antenna loaded on the value of lumped elements,Load location,and matching network integrated optimal design parameters,And using Sherman-morrisorr Woodbury formula to quickly solce the load component values and load the changed position of the impedance matrix equation to improve the efficiency of optimized design.

采用基于变分原理和剖分插值为基础的有限元法来快速精确分析法向模螺旋天线，然后结合遗传算法对加载法向模螺旋天线上的加载集总元件的值、加载位置以及匹配网络参数进行一体化优化设计，并采用Sherman-Morrisorr Woodbury公式来快速求解加载元件值和加载位置改变后的阻抗矩阵方程，提高优化设计的效率。

In spite of the very close affinity between the variational theorems and the principle of virtual work, the study of the former is worth-while

尽管变分定理与虚功原理之间有很紧密的相似关系，然而对前者的研究仍然是有价值的。

Must have Coordination and negotiation skill, flexible ideas, and be punctilious person.

必须具备较好的协调与谈判能力，头脑灵活，工作认真仔细

Result: 18 patients are all with simple eye.The pigment mole lies in nasal and temple sides of the ball conjunctiva,in which 2 lie in lacrimal caruncle and semilunar plica.

结果：18例患者均为单眼，色素痣大多数位于内外侧睑裂部球结膜面，2例位于泪阜及半月皱襞，经激光治疗后，10例色素痣消失，有5例行再次激光后消失，2例行第三次激光后消失，1例第四次激光后消失。