| 1. | In annular space , the values of tangential , axial and radial turbulence intensity were of the same order of magnitude
环形空间3个速度分量的湍流度是同一个数量级的。 |
| 2. | Additionally , the larger the circumferential velocity component of hub leakage flow , the greater the deleterious effect of hub leakage upon the rotor flow
另外，叶根泄漏流的周向速度分量越大，泄漏流对转子流场的不利影响也越大。 |
| 3. | The influence of turbulence is seen as a new term in the equations . this term is the divergence of a second - order correlation tensor of the fluctuating parts of each velocity component
湍流脉动的影响作为一个新的附加项?雷诺应力，出现在rans方程中，它是扰动速度分量二阶关联张量的散度。 |
| 4. | Using the optimal control theory an optimal control law of agile turn is proposed enabling to eliminate velocity component in vertical director of initial sight under thrust vector control
应用最优控制理论，提出一种最佳快速转弯控制律，能在推力矢量控制下消除终端时刻垂直于初始视线方向上的速度分量。 |
| 5. | Experiments about the influence of aeration on the velocity of the submerged jet was made . it has been proved that the main reason of the influence of aeration on scour is the more rapid decrease of the velocity of the submerged velocity . 6
对基岩的冲刷进行了数值模拟，选取临近底部的结点处的压强（压力水头值）与结点处水深的差值，再与结点处垂直于底面方向的速度分量的0 |
| 6. | Three kinds of results are obtained by simulation calculating the two models : the composed vector diagrams of the axial velocity ( v ) and the radial velocity ( vr ) at the different times in the symmetry section ; diagrams of curves of the velocity vector ( v ^ ) and ( vr ) at the different times in the different sections ; diagrams of the secondary flow vectors at the different times in the different sections
我们对两种不同直径的s型血管进行了有限元模拟计算，得到三种结果：在对称面内不同时刻的轴向速度v _和径向速度v _ r的合成矢量；在不同截面不同时刻的速度分量v _和v _ r的曲线图；在不同截面不同时刻的二次流的矢量图。 |
| 7. | The paper has improved the existing lifting - line and lifting - surface design method by including the rake and skew and solving the optimum circulation distribution with the optimum theory . the blade geometry is expressed with b - spline for the lift - surface method . the boundary condition on the blade is transformed to minimize the summation of the square of normal velocities , the fair blade geometry can be obtained by present technique and the design quality is better
改进了现有的升力线和升力面设计方法，在升力线设计中计及桨叶的纵倾和侧斜的影响，用优化理论求解最佳环量分布，升力面设计中用b样条来拟合桨叶，将物面边界条件转化为求法向速度分量的平方最小，由此可得到光顺的桨叶几何形状，提高和改进了设计质量。 |
| 8. | This thesis introduces the key technique of the us military distributed information system , with focuses on algorithms about related navigation of military tactics . kalman filtering combined with least square method is proposed for the current military development stage . the method of observation result including velocity component minimizes the convergence time , improves the positioning precision and acquired satisfied experiment results , which makes the pla independence of the us high - tech equipments
本文简要介绍了现阶段美军在战术信息分布系统实现中所采用的关键技术，重点对战术飞机相对导航的各种实现算法进行了深入探讨，针对我军当前在该系统领域中的技术现状，提出了以最小二乘法辅助卡尔曼滤波，滤波过程中观测量加入速度分量的方法，缩短了导航滤波起始阶段的收敛时间，提高了定位精度，在工程上取得了较理想的实验数据，在一定程度上摆脱了我军在相对导航领域对美军先进技术装备的依赖。 |
| 9. | The sub - optimal filter , which uses a 6 1 vector ( 3 position components and 3 velocity components ) as well as the corresponding covariance matrix to evaluate the performance of the filter , linearizes the original nonlinear system model and nonlinear observation model at their respective reference sample points
这一滤波方法对高度非线性的动力学系统模型与观测模型做了线性化近似处理,并选择由弹道位置与速度分量组成的6维状态矢量及其相应的协方差阵来评估系统滤波的效果。 |
