SYNERGETICS ANALYSIS OF ROCK MASS BASED ON ITS CHARACTERISTIC OF DISCONTINUATION

<正>Based on the noncontinuity of rock mass, views it as a system made of blocks that are divided by dissconti-nuties. Take the relative displacement of blocks as order parameter and establish its main equation using the micro-cosmic disposal method of synergetics. Then solve this equation and get its solution of nonstationary state. Narrate the characteristic of change and interrelated factors of blocks' displacement through the analysis of nonstationary state of main equation.     

上海市郊4种地表径流深度的测算

根据有关试验资料和美国土壤保持局推荐的方法，提出了上海市郊４种地表径流深度的计算公式。计算结果表明，当年降雨量为１０５３ｍｍ时，上海市郊４种地表径流的总量为１３．６亿ｍ＾３，平均径流深度为３００ｍｍ，径流系数为２８．４９％，４种径流量占郊区总量的７７．８２％，产流面积为郊区总面积的７５．１０％。     

利用多台首波Pn、直达波Pg走时确定地壳厚度及波速

本文通过对首波Pn、直达波Pg的走时的反演,推导出地壳厚度、震源深度、P波在地壳中、壳幔边界的传播速度之间的关系式,利用多台地震记录确定一个区域内这些参数的值,从而建立出该区域的地壳模型。     

平流式沉淀池流场的计算及探讨

计算了平流式沉淀池的流场，并和理想沉淀池关于速度分布假定进行了比较，指出关于理想沉淀池的速度假定并不一定十分符合实际，这可能是造成我国沉淀池处理效果不理想的重要因素。最后提出了一些合理的建议。     

基于不同厌氧反应形式动力学方程解析

基于传统生化动力学理论，分别以Monod方程、Contios方程推导出包含生化反应基本因素的代谢特征方程式；根据以循环为特点的厌氧反应器的运行特点，进一步椎导出建立在循环基础上的反应器代谢特征方程；通过分析厌氧反应过程机理和不同高效厌氧反应器的特点，提出了所建方程的应用原则及相应应用对象。     

入太湖污水中三态氮水质模型的研究

本文通过多次现场调查与室内实验的数据分析,对流入太湖污水中三态氮水质模型的建立进行了初步探讨。研究表明,模型的计算数值与现场实测数值基本一致。     

A high-order splitting scheme for the advection-diffusion equation of pollutants

ＩｎｔｒｏｄｕｃｔｉｏｎＷｉｔｈｔｈｅｄｅｖｅｌｏｐｍｅｎｔｏｆｍｏｄｅｒｎｉｎｄｕｓｔｒｙ ,ｖａｒｉｏｕｓｐｏｌｌｕｔａｎｔｓｄｉｓｃｈａｒｇｅｉｎｔｏｔｈｅａｉｒ,ｒｉｖｅｒｓ,ｌａｋｅｓａｎｄｏｃｅａｎｓ,ｗｈｉｃｈｍａｋｅｓｔｈｅｅｎｖｉｒｏｎｍｅｎｔａｌｑｕａｌｉｔｉｅｓｗｏｒｓｅｎａｎｄｈａｓｂａｄｅｆｆｅｃｔｏｎｔｈｅｍａｎｋｉｎｄ’ｓｈｅａｌｔｈａｎｄｔｈｅｓｕｓｔａｉｎｅｄｄｅｖｅｌｏｐｍｅｎｔｏｆｉｎｄｕｓｔｒｙａｎｄａｇｒｉｃｕｌｔｕｒｅ .Ｔｈｅｅｎｖｉｒｏｎｍｅｎｔａｌｐｏ…     

DO对同步硝化反硝化影响及动力学

研究生物接触氧化法中DO对同步硝化反硝化系统脱氮效率的影响。研究结果表明:在溶解氧(DO)为1.0～3.0mg/L范围内,随着反应器内溶解氧浓度的降低,总脱氮去除率提高,保持较好脱氮率的最佳DO为2mg/L左右,并分析了其原因;同时探讨了DO为2mg/L时的动力学方程。     

On the selection of primary variables in numerical formulation for modeling multiphase flow in porous media

Selecting the proper primary variables is a critical step in efficiently modeling the highly nonlinear problem of multiphase subsurface flow in a heterogeneous porous-fractured media. Current simulation and ground modeling techniques consist of (1) spatial discretization of mass and/or heat conservation equations using finite difference or finite element methods; (2) fully implicit time discretization; (3) solving the nonlinear, discrete algebraic equations using a Newton iterative scheme. Previous modeling efforts indicate that the choice of primary variables for a Newton iteration not only impacts computational performance of a numerical code, but may also determine the feasibility of a numerical modeling study in many field applications. This paper presents an analysis and general recommendations for selecting primary variables in simulating multiphase, subsurface flow for one-active phase (Richards' equation), two-phase (gas and liquid) and three-phase (gas, water and nonaqueous phase liquid or NAPL) conditions. In many cases, a dynamic variable switching or variable substitution scheme may have to be used in order to achieve optimal numerical performance and robustness. The selection of primary variables depends in general on the sensitivity of the system of equations to the variables selected at given phase and flow conditions. We will present a series of numerical tests and large-scale field simulation examples, including modeling one (active)-phase, two-phase and three-phase flow problems in multi-dimensional, porous-fractured subsurface systems.     

Modelling dynamics of managed tropical rainforests—An aggregated approach

The overuse of rainforests in the last century and its consequences necessitate a rethinking of logging policies. To this end models have been developed to simulate rainforest dynamics and to allow optional management strategies to be evaluated. Parameterisation of presently existing models for a certain site needs a lot of work, thus the parameterisation effort is too high to apply the models to a wide range of rainforests. Hence, in this paper we introduce the simplified model FORREG using the knowledge we have gained from a more complex model, FORMIX3-Q.