| 1. | The algorithm , which consists of two main parts , i . e . the particle tracing and the density estimation with mesh decimation , is described in detail
算法主要由两个模块组成：粒子跟踪过程，网格优化与密度估计过程，在此进行了详细介绍。 |
| 2. | 5 ) this thesis introduces the process of error within the dataflow model and analyzes the error in the particle tracing algorithms for vector field visualization
5 )在可视化数据流模型中引入误差处理，对3d流场的数值粒子跟踪计算进行了误差分析。 |
| 3. | By comprehensive analysis of hydrogeology condition , hydrology monitoring and particles tracing tests in the cavity area of benxi , the paper researches on the recharged source and its condition of sub rivers this area
摘要通过对辽宁本溪水洞区域水文地质条件、水文监测和示踪试验等资料的综合分析，对本溪水洞地下暗河的补给源及补给条件等进行了系统研究。 |
| 4. | With explicit runge - kutta methods for particle tracing , richardson extrapolation and re - integration ( with a smaller tolerance ) are used to estimate global error of the tracing path . the methods of visualizing error are also described
针对显式runge - kutta法的粒子跟踪，采用richardson外推、改变单步误差容限重复积分等方法对误差作出了估计，并实现了误差的可视化。 |
| 5. | The tidal current in the radial sandbanks area apparently has directional to - and - fro movement , which can be observed not only from tidal ellipses , but also from water particle traces . the calculated distribution of tidal velocity in this area shows that the average velocity is around 0 . 6 to 1 . 0 m / s
平面潮流椭圆、水质点迹线、潮流流速特征研究表明，辐射状沙脊群海域潮流具有明显的定向往复流形式，平均潮流流速一般为0 . 6 1 . 0m s ，满足形成潮流沙脊的水动力条件。 |
| 6. | The improved lagrangian stochastic model has attributed to the successful prediction of the turbulence inhomogeniety , turbulence anisotropy , and particle crossing - trajectories effect . the collisions between the particles are also considered in this thesis . numerical results for the particles trace and collection efficiencies in the cyclone separator were compared with available experimental data and with theoretic models
为了验证以上固体颗粒运动模型及修正的湍流模型，文中给出了颗粒在水平管道和u形撞击式分离器中的运动，比较了不同颗粒轨迹模型的特点及运动行为对流体湍流强度的影响。 |
