渗流

In this paper,we prove the existence and uniqueness of global weak solution of Non Newton Filtration equation with a kind of nonlinear boundary condition.

证明了一类具有非线性边值条件的非牛顿渗流方程解的存在和唯一性。

The flow resistance and the phase permeability and the coupling of the flow between the reservoir and the wellhole were adopted to admend the deliverability equations of the horizontal well, which improves the applicability of the formula and the adjusted deliverability equations can guide and serve in the fields production with the the horizontal well.

本文以评价边底水油藏水平井产能及影响因素为总体目标，在国内外文献调研基础上，采用镜像反映原理和势的叠加理论推导出边底水油藏水平井产能公式，然后考虑完井、多相渗流及井筒压降对产能的影响，提出了利用流动阻力、相渗透率及井筒与油藏流动耦合修正水平井产能的修正方法，提高预测公式的适用性，为边底水油藏水平井生产提供了指导作用。

In view of macroscopic visualization and sub-macroscopic visualization techniques, penetration model of the laterstage of the melting zone was developed.

基于宏观和亚宏观可视化技术，对单螺杆挤出机挤出过程中物料熔融后期的固相破碎现象提出了渗流模型，并对固体床破碎现象进行了细观解释。

Through the research of direct search method based on 3D FEM, and its application for the tunnel slope stability analysis, the objectives of this work in this paper are as follows:1. The dynamic programming as well as its application for 3D side slope stability analysis is studied. With the introduction of graph theory concept, one kind of glide pattern of 3D slope is constructed, and the critical slip surface with smallest safety factor is searched with the aid of one auxiliary function including safety factor;2. Using the C++ programming language, the 3D slope stability analysis and the direct search procedure is established, and this method is testified applicably by some contrast analysis, also some influence factor in analysis is discussed;3. Integrated with the different actual situation in tunnel slope, considered its excavation, timbering and rain infiltration, its stability influence and rule is researched used this method, also some processing measure is proposed.

本文通过对三维有限元直接搜索法的研究，并将其应用于隧道边坡的稳定性分析中，主要的研究内容有：1、研究了动态规划原理及其在三维边坡稳定性分析中的应用，引入图论概念，构筑出一种边坡三维滑裂面的滑动模式，借助一个包含安全系数的辅助函数并通过动态搜索求得临界滑裂面与最小安全系数；2、采用C++程序设计语言，编制出边坡三维稳定性分析以及直接搜索法的程序，通过一些算例的对比分析，验证本文方法的适用性，并讨论了三维分析中的一些影响因素。3、结合隧道边坡的不同实际情况，考虑施工开挖过程、衬砌结构及降雨渗流等方面的因素，利用本文方法研究对其稳定性的影响和规律，并提出处理措施

The analysis shows that the flow course and the pressure characterist...

研究表明，对于不同的地层特征和压裂方案，压裂水平井的渗流过程及压力动态特征与常规水平井明显不同。

Base on the assumption of compressible skeleton, grain and water, the saturated governing equations are deduced.

基于介质骨架、固体颗粒以及水是可压缩的这一假设，推导出饱和的渗流应力耦合控制方程组。

The production performance of a gas reservoir idicates that the starting pressure phenomenon occurs in gas flow just as the one occurs in liquid flow and the gas "slippage effect" seems to be contradictious to its starting pressure, therefore it is very necessary to study the generation condition and change law of the both through testing.

实际气藏的生产特征反映出气体渗流与液体一样存在启动压力现象，而气体的&滑脱效应&似乎与气体的启动压力现象相矛盾，所以极有必要通过试验来研究气体二者现象产生的条件及变化规律。

Remove row and column' and 'put a big number' have been used for the first boundary;a continuous Regional Identification Function is used on the basis of non-variant nodal virtual flux method for the free surface boundary;Gauss formula is used to make the curved surface integral of the free surface boundary transformed as the difference between volumn integral and other curved surface integral to calculate the integral item on boundaries, which avoiding finding the position of free surface, while the continuous Regional Identification Function is applied to calculate volumn integral and surface integral;Crout and PCG method is used for solusion.

对于已知水头边界，采用&去行去列法&和&置大数法&进行处理；对于自由面穿过的单元，在固定网格节点虚流量法的基础上，引入连续的区域识别函数；对于非稳定渗流中自由面边界积分项，采用高斯公式将求自由面的面积分转化为求体积分与其他面积分之差，避免了求自由面的具体位置，同时在计算体积分和面积分时采用连续的区域识别函数；在解法上，采用直接解法和PCG法。

The chemical stability of red beds is not good for the dissolvable chemical composition of red beds and evaporite.

蒸发岩和红层岩土体中可溶成份在水作用下，容易发生岩溶、腐蚀、渗流等物理化学问题。

Anionic surfactant sodium dodecyl sulfate can be used to enhance or regulate the EOF.

另外，在缓冲液中加入阴离子表面活性剂SDS可以调节电渗流的大小。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。