| 1. | 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。 |
| 2. | The wind loading of a tracking radar antenna , for example , results from a mean velocity component that varies with time plus superimposed random gusts
例如跟踪雷达天线的风力负载是由一个随时间变化的平均速度成分与迭加的随机阵风组成的。 |
| 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. | The distribution of stream - wise particle velocity follows the log - law under various flow conditions and for different particle diameters , and the fluctuation of the other two velocity components is random
对不同的粒径和不同的水流条件，颗粒纵向平均速度都符合对数分布规律，垂向和横向的平均速度属于随机波动的范围。 |
| 6. | A three - dimensional - acoustic doppler velocimeter is used to measure the velocity components of the flow field in all three coordinate directions for different discharge and measurement site . the influence of measurement site and the depth / vegetation height ratio on the measured velocity profile and turbulence intensity and the renolds stress is analyzed . the characteristics of the measured velocity distributions and the results of the previous investigators are used to select an analytical expression for the shape of the velocity profile
利用三维超声波多普勒流速仪( adv )量测不同位置、不同流量下的瞬时流场。分析了测点位置和水深与植被高度比对时均流速分布的影响。本文还给出了种树段紊动强度及雷诺应力的垂线分布。 |
| 7. | By means of temporary stability of combining drift coefficient of angle sensor and through missile rotating two - position measurement , measuring rotating angle between the two positions by vertical sensitive axis x , and sensing the changes of ground velocity component between the two positions by horizontal sensitive axis and z , the position of the component is determined to realize the azimuth alignment before launch of tactical missile
角敏感元件漂移系数具有短期稳定性，通过转弹前后两位置对组合的测试，垂直敏感轴计测转弹过程中两位置之间的转角，两水平敏感轴敏感计测地速分量在前后两位置的变化，由此计算出部件当前所在方位，从而实现战术弹射前的方位对准。 |
| 8. | Several influence factors to result plasma drift in hainan were analyzed . in this paper the characteristics of ionospheric parameters variation were analyzed systematically and some new results in storm - time such as seasonal behaviors were obtained ; it is the first time to investigate the ionospheric drift behavior in hainan and some new results was obtained , the relationships between each two plasma drift velocity components in storm time in hainan were found and the electric filed variation in hainan ionosphere also was obtained ; the results also show that there are big differences of the ionosphere parameters bo and bl obtained from the data with that obtained from the iri - 2001 applied for hainan ; a new phenomena was found during a strong magnetic storm , that a layer with very strong electron density and density grad was found during the recovery phase of the storm , its horizontal scale is beyond 100km and temporal scale is about 2 hours , this phenomena repeated 3 times continuously . a type of negative disturbance in high and low latitude but positive disturbance in east - asia also has been found
本文较为系统地给出了海南地区电离层的参数变化特征，特别是得到了一些暴时与以往不同的季节特性；第一次给出了海南地区的电离层等离子体漂移特征，发现等离子体漂移暴时扰动在三个方向上有内在的联系，得到了电场变化曲线；研究结果还表明海南电离层的半厚指数和形状参数等与国际参考电离层iri - 2001存在很大差别；通过对强磁扰动事件期间的参数变化特性分析发现，在磁暴恢复相期间海南地区电离层底部存在一个电子密度非常大的高密度区，高密度区底部电子密度梯度随高度急剧增加，该区域的水平尺度可达100公里以上时间尺度约为2小时，连续出现过三次，这是一个在海南从来未发现的新现象；研究还发现了暴时东亚地区电离层扰动会出现高低纬负相而中纬正相的现象。 |
| 9. | 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。 |
| 10. | 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。 |
