three-dimensional velocity

An AUV Obstacle-Avoidance Method Based on Three-dimensional Velocity Potential Field

基于三维速度势场的AUV局部避碰研究

互联网摘选

Finally, an approach of ART is applied to a synthetic model with lateral heterogeneity, and the analog results of three-dimensional velocity distribution have been given.

最后提出对横向非均匀结构用层析技术的代数重建法（ART）进行成象，并给出了三维数值模拟结果。

互联网摘选

Research on three-dimensional velocity measurement using nonorthogonal LDV

非正交LDV测量三维速度的一些研究

互联网摘选

Based on a multifunctional CFD software, the three-dimensional velocity field within the impeller of NASA low-speed centrifugal compressor is computed in detail in this paper.

本文采用一多功能流体动力学计算软件，详细计算分析了NASA低速离心压气机叶轮内部的三维速度场。

互联网摘选

The standard K-ξ model of steady turbulent flow in software FLUENT is used to simulate the interior airflow field. Three-dimensional velocity and temperature field are obtained.

对室内气流场的模拟，采用FLUENT软件中的标准k-ξ模型进行稳态湍流流动的数值模拟，模拟结果分别得到了室内气流的三维速度场、温度场等。

互联网摘选

The calculated three-dimensional velocity distribution of impeller discharge flow basicly meets the experiment results.

计算所得的桨叶排出流的三维速度分布与实验结果大体一致。

互联网摘选

Study on Liquid Three-Dimensional Velocity Field on Tray by Computational Fluid Dynamics I

塔板液相三维流场的研究（Ⅰ）试验测量

互联网摘选

Experiment results show that the filtering algorithm of restrain divergence can get more good filtering results than kalman filter, and obtain smaller errors of three-dimensional position and velocity.

实验结果表明在考虑加入抑制滤波发散算法后，可以获得比常规卡尔曼滤波器更好的滤波效果，获得的三维位置和三维速度的误差较小。

互联网摘选

Three-dimensional velocity structures of the crust in West China

中国西部及邻区的地壳三维速度结构

互联网摘选

Real-time surface velocity field measurement system and three-dimensional particle velocity measurement system are developed. Systematic experimental research on the movement of coarse sediment particles in open-channel flows was carried out using developed system.

本文研制开发了表面流场实时测量系统和颗粒三维运动测量系统，并采用颗粒三维运动测量系统对明槽水流中粗颗粒的运动进行了系统的试验研究。

互联网摘选

Three-Dimensional Vector Velocity Measurement in Optical Doppler Tomography

光学多普勒层析三维矢量测速方法研究

互联网摘选

On the basis of three-dimensional velocity field observation, the relationship between collection efficiency of straight-flow Cyclone tube with guide vanes and its principal structure parameters is presented.

用实测三维流场的方法，研究了导叶直流式旋流管的分离性能与旋流管主要结构参数的关系。

互联网摘选

Based on data collected by deep seismic sounding carried out in 1999, a three-dimensional P wave velocity structure is determined with tomographic inversion.

根据1999年腾冲火山区人工地震探测资料，用层析成像方法反演了腾冲火山区上地壳三维P波速度结构。

互联网摘选

On the basis of three-dimensional equations of motion and the equation of continuity of the incompressible unsteady flow, the three dimensional velocity distribution and variation of tidal levels with.

本文根据不可压缩三维非定常流的动量方程和连续方程，求解了宽浅型明渠中三维流速分布和水位随时间的变化规律。

互联网摘选

By comparing and analyzing the measured water level, three-dimensional velocity distribution and turbulent character around the bridge location, the calculation method for the backwater of skew bridges is improved and the reduction factor of block water width is presented.

通过对桥位附近的实测水位与水流三维流速分布及紊动特性的比较分析，改进了计算斜交桥壅水的方法，并给出阻水宽度折算系数。

互联网摘选

Average velocity map for seismic horizon interpretation was plotted by using the three-dimensional velocity data volume and time structure map.

然后利用三维速度数据体与等t0图得到解释层位的平均速度图；

互联网摘选

By use of the teleseismic P arrival times at 15 stations of Beijing network for 120 events distributing over various azimuths, we studied the three-dimensional P velocity structure under Beijing region.

用分布在北京地区各方位上，震中距在20°&100°范围内的120次远震在本区15个地震台上的P波到时，研究北京地区地壳和上地幔的三维速度结构。

互联网摘选

It calculates the forming force of open-die cold extrusion of rectangle spline using upper bound solute based on the three-dimensional velocity field of metal flow.

本文在分析矩形花键冷挤成形流动规律的基础上，应用上限法计算出了矩形花键无约束正挤压的成形力。

互联网摘选

Three-dimensional velocity components and virtual temperature were measured using ultrasonic anemometer above an area by sea.

采用三维超声风速仪测量了近海边三维风速和虚温数据。

互联网摘选

Numerical Simulation Study on Three-dimensional Velocity Field of Fluvial Channel Current

河道水流三维流速场的数值模拟研究

互联网摘选

By this model, the turbulent mass transfer diffusivity, the three-dimensional velocity/ concentration profiles and the efficiency of chemical equipment can be predicted simultaneously.

使用这一模型可同时计算出湍流传质扩散系数、三维浓度场和速度场分布。

互联网摘选

A computational fluid dynamics ( CFD) model was developed for describing the hydrodynamics of large scale sieve trays. A two-fluid model to simulate the three-dimensional velocity field of the gas-liquid two-phase flow on a sieve tray was presented.

运用CFD数值模拟方法，建立了大型筛板塔塔板上气液两相流双流体模型，数值求解了三维速度场分布。

互联网摘选

The three-dimensional particle velocity in a CFB cold model, the turbulent flow energy in the CFB and particle vertical voidage are measured with a three-dimensional particle dynamic analyzer ( PDA).

利用三维粒子动态分析仪（PDA）测量了流化床冷态模型中的三维粒子速度，测量了循环流化床内的湍流能量，也对粒子的轴向空隙率进行了测量。

互联网摘选

The results of the research show that three-dimensional wall jet can improve the velocity of water near the wall greatly, so it is possible to apply to the actual dredging work in the pipeline.

研究表明，三维壁面射流能较大的提高近壁区的流速，因此应用到实际管道清淤工作中有一定的可行性。

互联网摘选

Three-dimensional P velocity structure of the crust and upper mantle under Beijing region

华南上地幔P波速度结构北京地区地壳和上地幔的三维P波速度结构

互联网摘选

GPS has become one of the most important methods of measurement in geodetic, primarily because its advantages of three-dimensional positioning velocity, precise timing, real-time throughout the day, free resources highlight.

GPS在大地测量方面已成为最主要的测量方法之一，主要是由于其具有三维定位测速、精确定时、实时全天后、免费资源突出等优点。

互联网摘选

According to the characteristics of AUV, the collision field and three-dimensional velocity potential field are built, and the latter is composed of horizontal and vertical velocity potential fields.

根据AUV的特点建立了空间碰撞危险区域和由水平面速度势场和垂直面速度势场组成的三维速度势场。

互联网摘选

The three-dimensional numerical model for a single plane fissure grouting was established. By using time-dependent viscosity constitutive equation, the transient law of grout diffusion behavior, pressure field and velocity field was researched.

建立了单一平板裂隙浆液扩散的三维数值模型，采用粘度时变本构方程，研究了浆液扩散形态、压力场和速度场分布、地下水流量的瞬态规律。

互联网摘选

The bubble size, position, three-dimensional velocity, locus and gas component, pressure, temperature of the bubbles could be calculated.

该模型可以计算气泡的大小、所在位置、三维速度、运动轨迹、内部气体成份、压力及温度等；

互联网摘选

Three-dimensional P wave velocity structure in Beijing-Tianjin-Tangshan area

京津唐地区中上地壳三维P波速度结构

互联网摘选