| 1. | Then , a pressure - based height field fluid model is proposed and the pressure to simulate the fluid surface height is justified
在此基础上给出基于压力高度域的水流模型，并阐述了该模型的合理性。 |
| 2. | To get texture maps at appropriate size , an accelerated method for wei and levoy " s basic algorithm ( for short , wl algorithm ) is presented
为了生成满足水流模型空间大小的纹理，本文给出了搜索带加速的wl纹理合成算法。 |
| 3. | In our approach , the water surface is regarded as a height field and the main body of water can be regarded as vertical columns
在我们的水流模型中，水表面看作一个高度场。水流整体可以按微元的观点看成由一系列竖直水柱拼接而成。 |
| 4. | After we convince these realities we can study the variable law of groundwater in shanghai and we can set the exactly complete model of groundwater resource estimation and ground subsidence
了解这些情况对于我们研究上海地区地下水变化规律以及建立准确完整的地下水水流模型和地面沉降模型具有重要的参考价值。 |
| 5. | Firstly , three dimensional flow model should be adopted so as to establish equations for aquitards and consider heterogeneity of aquitards , in which the values of parameters vary with subsidence of soil layers
如何描述引起地裂缝的水平位移，分两步进行的耦合不合适，要做到水流模型与沉降模型的真正耦合等八个方面的步骤。 |
| 6. | Firstly , a 1 - d flow numerical model based on the preissmann scheme , a 1 - d rivernet flow numerical model based on the direct solution method and a 2 - d tidal model based on the implicit scheme of finite difference method are programmed
本文首先建立了基于preissmann算法的一维水流模型、基于直接解法的平原河网模型和基于有限节点法的平面二维水力模型，在对各模型的算法进行推导的基础上自行开发了计算程序。 |
| 7. | Characteristics of present land subsidence models in china were as follows : ( 1 ) flow models were quasi - three dimensional models ; ( 2 ) parameters in models were constants ; ( 3 ) subsidence models were linear elastic models ; ( 4 ) couple of flow model and subsidence model had two steps
摘要我国现有模型有下列特点：水流模型都是准三维模型，模型中的参数都是常数，沉降模型采用线弹性模型，水流模型和沉降模型的耦合分二步进行。 |
| 8. | In the paper , river and the downstream area of dike are regarded as a whole system , and hydraulic model of coupling 1 - d river and gradual dike - break is established , therein the preissmann implicit difference scheme is applied to main river , and the fvm ( finite volume method ) is applied to the breach and polder
本文将河道与堤坝下游区域视为一个整体，对于单一河道采用preissmann四点隐式差分格式计算，对于溃口及圩区采用有限体积法，建立了一维河道与堤坝渐溃耦联的水力模型，也是一维、二维耦合的水流模型。 |
