查询词典 initial approximation

The nonlinear dynamic equations including the initial geometric imperfections of laminated composite cylindrical shells were derived from Hamilton's philosophy. Assuming the transverse displacements to be composed of axially symmetrical part and axially asymmetrical part, the governing equations expressed as displacement forms of dynamic buckling were obtained by Galerkin method. The equations were solved by finite difference method. The effects of impact velocity, lamination angle, initial geometric imperfection on the axial dynamic buckling of laminated composite cylindrical shells were discussed.

由Hamilton原理导出包含初始几何缺陷的复合材料层合圆柱壳的非线性动力方程；将横向位移设为对称及非对称两部分，由Galerkin方法得到以位移形式表达的动力屈曲控制方程，通过有限差分方法求解；讨论了冲击速度、铺层角度、初始几何缺陷等各种因素对复合材料圆柱壳轴向冲击动力屈曲可能产生的影响。

Optimization experiment being single factor shows that the best condition of tannase production should be in the gallnut amount of 8%, the initial moisture content of 50%, the initial pH 6.0, temperature of 30℃.

单因素优化试验表明，五倍子用量为8%，初始水分含量为50%，初始pH6.0，温度30℃为优化产酶条件。

The influence of initial imperfections on the stability ofcomposite laminated plates was studied by solving the nonlinear governing equations for laminated plates with elastical restraints subject to in-plane loading using the energy variational principle and nonlinear geometric equations incorporating the initial imperfection. The governing equations were solved using generalized Fourier series to obtain the effect of the non-uniform order term.

为深入研究初始缺陷对复合材料层板稳定性的影响，利用能量变分原理和考虑初始缺陷的非线性几何方程，建立了具有弹性约束的层合板在面内载荷作用下的非线性稳定性控制方程组，运用广义傅立叶级数法对其进行求解，并进一步获得了影响非线性稳定性控制方程组的性质的非齐次项。

Second, an analysis and contrast is made among several structures appearing in the market, one of which is chosen to be the initial model of the system and the need of initial parameters is calculated based on relevant geometrical optics.

然后对市场上现有的几种结构进行分析对比，选取其中一种作为设计的初始模型，利用相关光学知识计算初始设计参数。

Special FEM analysis considerations of pantadome system are taken into account in the mechanical theoretical analysis. The problem of initial deformation and initial stress of pantadome, serialization treatment of the FEM results are discussed, the treatment methods of calculate results are deduced, membrane stress and flexural stress of gyrate shell are deduced in this paper.

在攀达穹顶的力学理论分析中，针对攀达穹顶体系的特殊性进行了有限元分析，研究了攀达穹顶体系分析中的初始变形与初始应力问题，对攀达穹项体系有限元计算结果进行了连续化处理，提出了计算结果的连续化处理方法，推导了连续化处理时各个力的求解方法并求解了旋转壳的膜应力和弯曲应力。

Simulation results show that the proposed method comes to stabilization within 50 s and that its tracking initial error can be reduced to the hectometer level with the measurement precision of 20 ns. But the traditional method requires 250 s to go to stabilization and its tracking initial error is greater than the kilometer level.

仿真结果表明，在20 ns的测量精度条件下新方法在50 s内即可进入稳定跟踪状态，跟踪起始误差也减小至百米量级，而传统时差定位方法需要250 s才能进入稳定跟踪状态，跟踪起始误差则超过了千米量级。

The process is characterized in that, the zoomed image being defined by its horizontal and vertical homothety ratio with respect to the coded image (1, 7), it performs the following steps: calculation of the horizontal and vertical sizes of an initial display rectangle (8) from which would be obtained the sizes of the target display rectangle (2) as defined by the profile and level information by applying the horizontal and vertical homothety ratios, storage in the display_horizontal_size and display_vertical_size fields of an MPEG2 video data stream of the horizontal and vertical sizes of the initial display rectangle.

该方法的特点是被缩放图像由它针对被编码图像(1，7)的水平和垂直缩放率定义，它执行下面的步骤：通过应用水平和垂直缩放率来计算初始显示长方形(8)的水平和垂直尺寸，从中可以获得按照轮廓和级别信息定义的目标显示长方形(2)的尺寸，在MPEG2视频数据流的display_horizontal_size和display_vertical_size字段中存储初始显示长方形的水平和垂直尺寸。

There is the Cauchy problem of hyperbolic system with weak damping in Chapter4. In the space of dimension N=1,3, exploiting the semigroup method, the global existence and the decay behavior of the solution with small initial data to problem (about problem with small initial data) is put forward.

当空间维数N=1，3和初值充分小时，利用半群理论得到问题整体解的存在性，并对于整体解给出一致衰减估计；当空间维数N=1 时，利用试验函数方法讨论解在有限时刻爆破的条件。

In this paper, flume experiments on the formation of initial ice jam thickness and its varying mechanism were carried out, brought to light the relations between factors of initial ice jam thickness, flow condition and ice discharge etc..

本文通过水槽试验，对初始冰塞厚度的形成及变化机理进行了试验研究，揭示了初始冰塞厚度与水流条件和冰流量等因素间的相互关系。

The algorithm optimizes the initial profile position to address effectively the impact of the initial location of the evolution curve speed,by through point by point to the generation of energy function for the minimal value,to reduce the amount of computation,improve the speed of image segmentation.

该算法优化了初始轮廓位置，有效地解决了初始位置影响曲线演化速度问题，并通过逐点代入法来极小化能量函数，减少了计算量，提高了图像分割的速度。

Many will continue to choose to live in duality and in conflict.

许多人将继续选择活在二元对立性和冲突中。

I find that students of the University of Physical Education all wear sportswear at first sight.

我发现：体育大学的学生乍一看，都是穿运动衣，大家都一样