速度势

The scale of the construction is 50 thousand tons per year BDO project, and the finished products are BDO, butylene oxide and gasol.

我国一直是BDO的净进口国，近几年来的进口量呈逐年上升之势，BDO在国内的消费函盖PB吨、聚氨酯、四氢呋喃、γ-丁内酯等诸多方面，另一方面，国外BDO生产和销售的发达国家近几年酯-醚共聚物消耗BDO的速度发展很快，估计未来BDO在国内的消费速度约为10％，高于国民经济约2-3百分点，这个发展速度基本符合BDO的消费实际。

Using the directional derivative formula, the governing equation is discreted in the physical domain in which a nonorthogonal grid system is used. Two kinds of AF2 schemes, i. e. AF2-plane relaxation and full implicit AF2, for the TSD equation are proposed. Numerical results show that the full implicit AF2 scheme converges faster than AF2plane relaxation scheme. For the rectangular wing and swept wing, the results of the present method are compared with FP results, and the agreement is good.

采用适合于梯形机翼和后掠机翼的斜网格，利用方向导数公式直接在物理空间对主管方程进行离散；将近似因式分解方法应用于绕机翼的跨音速小扰动势流问题，提出AF2—面松弛和AF2全隐式两种迭代格式，并对它们的收敛速度进行比较，结果表明后者明显快于前者；直机翼和后掠机翼的算例表明，本文方法的结果与精确势流方法的结果吻合良好。

Uniform rate both from the potential effect of the potential to close the entire movement, including single-action operation with the hands and feet with the speed, but also on an action and an action under the coordination of the transition natural convergence.

速度均匀既包括从起势到收势的整个套路，也包括单式动作手脚运行与配合的速度，还包括上一个动作与下一个动作的过渡衔接自然协调。

Based on the vibro-acoustography and basic sector-array field theory, a modified and accurate velocity potential function is obtained.

在相关振动声成像和扇阵换能器的理论基础上，经过推导修正并得到了精确的速度势函数。

To solve the velocity potential,we used an integro-differential equation.

采用关于扰动速度势的基本积分微分方程，并采用双曲面形状的面元以消除面元间的缝隙。

We first calculate the velocity potential between two adjacent time-steps and obtain the inertia force and added mass through integration.

本文通过直接求解船在变速运动时两个相邻时刻的速度势，进而积分得到附加惯性力及附加质量。

Because of the viscosity of fluid and non-existence of velocity potential, the symmetry of mass matrix, stiffness matrix and the coefficient matrix of the first order of system no longer exists, so the modal analysis of system becomes very complicated.

由于流体粘性的影响，流场有旋，没有速度势，所以系统质量阵、刚度阵以及一阶项的系数矩阵的对称性被破坏，从而使得系统的模态分析变得很复杂。

During different periods of Dan, there was great water vapor change as indicated by stream function, velocity potential and vapor budget, which showed the importance of water vapor in the development of typhoon Dan.

在Dan发生发展的不同时期，由大尺度水汽通量流函数和速度势表示的水汽通量输送和辐合也有明显的变化，表明水汽输送和辐合在Dan的发生发展及消亡过程中有一定作用。

For the floating body with complex bow and stern, the molded line reconstruction method is adopted to generate the section lines on the bow and on the stern which are necessary to construct the wetted surface, and it can raise efficiency greatly that the intersection lines of intersection structures are obtained by the way of combining modeling tool and NURBS technology; then the patch representation method is adopted in generating the mesh of wetted surface and interior free surface, and the velocity potentials on them are expressed separately, on basis of which the irregular frequency effect is dealt with in the calculation of hydrodynamic coefficients.

对于有复杂首尾结构的浮体，用型线重构的方式在首尾生成曲面构成所需要的截面线，将通用建模工具和NURBS曲线拟合相结合，生成相贯结构的相交线；然后，用分片法生成浮体湿表面及内自由面网格，并独立表达各自的速度势以处理不规则频率现象，进而进行水动力系数计算。

The fluid domain was divided into two regions by imaginary interface. The velocity potential in each region was expanded by eigenfunctions.

假想存在一个圆柱面，把流场划分为内外区域，在每个区域上将速度势用特征函数展开，然后在它们的公共边界上进行街接。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。