离散分布

Differenced equations are solve by gauss-seidel and SUR method , profiles of water film thickness and velocity are gotten .

离散方程组采用高斯—赛德尔迭代和持续亚松驰相结合的方法计算，得到板壁水膜的厚度和速度分布。

On the basis of solute transport theory, the coal gangue eluviated in Xinqiu in Fuxin coal miming area was studied for the pollution of groundwater. The mechanism of coal gangue eluviated in the aquifer was analyzed. A coupled numerical model was developed with convection、sorption and dissolve、disintegration for simulating the leachate transport in groundwater. The model was discreted by using a Gelarkin finite-element method and a Picard iteration scheme, and the process of coal gangue leachate was presented, which predict the temporal and spatial distribution features of contaminant concentration. The result indicates that the contaminated plume is continually extended as time increases, and the vertical diffusion is more abvious.

以溶质运移理论为基础，针对阜新市新邱露天煤矿煤矸石淋滤液对地下水污染实际情况，分析了煤矸石渗滤液在含水层中运移的规律，在综合考虑对流扩散、吸附解吸、生物降解条件下建立了淋滤液在地下水中运移的耦合动力学数学模型，采用Galerkin有限元方法和Picard迭代法相结合对耦合模型进行了离散，模拟了淋溶液对地下水污染的动态过程，预测了污染浓度的时空分布特征，并结合实际观测数据进行对比。

That means using the measure close degree of area vector between each cycles and the first cycle to express the coincidence...

即利用各周期与第一周期的面积向量的测度贴近度表示重合度，定量地描述各周期内轴心轨迹的重合情况；在此基础上提取了反应重合度整体离散度的标准差；利用象限面积向量信息熵进行综合的、定量的评价滑动轴承各个周期内轴心轨迹的总体分布均匀性。

Firstly ,based on soil water conditions,water balance methods including the method of soil water balance and Zero Flux Plane areused ot simulate the soil water balance medel of the district researched ,and analyze the distribution of soil matric potentials and soil water content of different deep,then the models quantities are made discrete and Fortran programs are designed and implemented to calculate the crop water requirements.

首先，从土壤水分供水状况因素考虑，采用水量平衡方法，它包括大田水量平衡和零通量方法，模拟研究区大田水量平衡模型，分析研究区不同深度土壤水势和土壤含水量的分布。在此基础上，对平衡模型进行数值离散化，并通过 Fortran 语言编程计算作物需水量。

Based on the analysis of physics course of heat transfer, the mathematical model of single-phase flow in the rectangular narrow channel is proposed. And the boundary conditions are given to get the unique numerical result. The finite volume method is used to found the discrete scheme of equations. According to the flow of SIMPLER arithmetic, the computing program is developed and the correctness of program is validated.Then the program is used to solve the problem of flow and heat transfer in rectangular narrow channel.The stable two dimension velocity and temperature fields in rectangular narrow channel and plate fuel are obtained.

在明确窄缝流道及燃料板换热物理过程的基础上，建立了描述矩形窄缝内单相流动与换热问题的数学模型，并给出了合理的边值条件；然后利用有限容积法对方程进行离散，根据SIMPLER算法的流程编制了模型求解程序；在验证程序正确性的基础上，对矩形窄缝流动与换热问题进行了求解，得到了矩形窄缝流道和板状燃料元件内部温度场、速度场的二维分布。

The seismic data between the wells are inversed on the base, and deduce the lithology variation of coal-bearing stratum.

谱分解技术是利用薄层调谐体离散频率特性，通过分析复杂岩层内陷频谱变化和局部相位的不稳定性，识别薄地层横向分布特征。

To improve the magnetic field homogeneity, therefore, a cylinder magnet from several crescent-shaped magnets is presented.

为此，采用一种具有磁化方向近似线性分布的离散新月形磁块构成圆柱形磁体以改善二极磁场的均匀度。

The method of finite element discrete and optimal parameter back analysis is adopted.(3) Concentrated on the question of high external water pressure of the deep-lying tunnel, the basic theory and method calculating external water pressure are systematically studied.(4) Based on Jinping cascade 2 hydropower station, numerical simulation rain infiltration of seepage field under different drainage pattern and grouting pattern are studied, also, the high external water pressure is analyzed and studied and some seepage control measures are put forward.

2采用有限元离散—优化法进行参数的反演分析；(3)针对深埋隧洞的高外水压力问题，进一步分析和研究了衬砌水荷载及外水压力的作用机理和计算方法；(4)以锦屏二级水电站深埋长引水隧洞作为本文的主要研究对象，采用考虑降雨入渗渗流场分析的方法对排水方案和灌浆封堵方案不同情况下的渗流场的水头分布进行了数值模拟，并对其外水压力进行了分析和研究，提出了渗流控制的具体措施。

Basing on the theory of two-phase flow of gas and solid, and the characteristics of coal mine driving working face , using the discrete phase models of computational fluid mechanics to simulate the dust concentration during the ventilation process of coal drift driving with exhaust ventilation.

根据气固两相流理论，针对矿井掘进工作面的特点，采用计算流体力学的离散相模型对掘进工作面通风过程中粉尘浓度进行数值模拟，总结抽出式通风掘进巷道中粉尘浓度的沿程分布及变化规律。

According to the effects of nonlinear potentials on symmetries and their strength distributions, one is able to predict the existing discrete breathers in a given system, which is real helpful to theoretical analysis and numerical calculation.

根据各非线性势能系数对解的对称性的影响以及不同大小的非线性势能函数对解的影响强度的分布，可以对特定系统中可能存在的离散呼吸子解进行预测。

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。