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数值模型
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  numerical model
    An Upwinding Finite Element Numerical Model for TP Distribution in Shallow Lakes and Its Application to lake Taihu
    浅水湖泊TP分布的迎风有限元数值模型研究
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    Numerical Model of Landfill Gas Migration
    填埋场释放气体运移数值模型
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    Numerical model of landfill gas migration and its application
    填埋场释放气体运移数值模型及应用
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    Ecological numerical model of water quality in river
    河流综合水质生态数值模型
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    Study on numerical model for TSP diffusion and its application in the urban area
    城区大气中TSP扩散的数值模型与应用研究
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  numerical modeling
    Numerical modeling with multiphase flow model of petroleum pollutant transport in subsurface environment
    石油污染物在地下环境系统中运移的多相流数值模型
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    Numerical Modeling Application in Prediction of Water Quality in Daguhe River Groundwater Source Field, Qingdao
    数值模型在青岛市大沽河水源地地下水水质预测中的应用
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    APPLICATION OF NUMERICAL MODELING TO PREDICTION OF WATER QUALITY IN DAGU RIVER GROUNDWATER SOURCE AREA, QINGDAO
    青岛大沽河水源地地下水水质的数值模型预测
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    Principle and general process of environmental modeling supported by GIS were introduced, and the application of GIS technology to the process of tide-current and pollutant dispersion numerical modeling, including computational domain delineation, computational mesh generation, and model parameters extraction, was also discussed in the paper.
    本文介绍了GIS支持下的环境建模的原理和一般过程,初步探讨了GIS技术在海湾潮流潮位数值模型和污染扩散数值模型建模过程中的计算域确定、计算网格生成以及模型参数获取等方面的应用。
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    Part I, the concept and application of numerical modeling are introduced briefly.
    全文共分为五个部分,第一部分主要介绍了数值模型的概念及应用;
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    Research on Modelling Water Exchange and Nutrient Budget in Jiaozhou Bay
    胶州湾水体交换与营养盐收支过程数值模型研究
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    QSAR MODELS FOR CHLOROPHENOL
    多氯酚QSAR数值模型比较研究
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    Model of Advanced Treated Wastewater Recharging Groundwater
    深度处理污水回灌地下的数值模型
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    A three dimensional coastal hydrodynamic and pollutant diffusion model
    港湾三维水动力和污染物扩散数值模型
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    MT3D, A3D Transport Model for Simulating Advection, Dispersion, and Chemical Reactions of Contaminants in Ground Water
    MT3D—通用的三维地下水污染物运移数值模型
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  numerical model
Based on the basic principles of the micrometeorology of atmospheric boundary layers and vegetation canopy, a numerical model of the interaction between forest ecosystems and atmospheric boundary layers was developed.
      
Kinetic theory was introduced to establish a 3D kinetic numerical model for wavelike slug gas-solid flow in this paper.
      
The flows were also analyzed using a numerical model of the three-dimensional turbulent flow in the pumps near the peak efficiency point using the k-? turbulence model and the VOF cavitation model.
      
A three-dimensional physical and numerical model of the basic pulse tube refrigerator (PTR) was developed.
      
The numerical model of automaton behavior is helpful in applying algebraic tools to solve the functional behavior renewal problem.
      
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  numerical modeling
The research topics include: numerical modeling of random seismic waves, probabilistic density evolution analysis for nonlinear structural responses, and seismic reliability analysis of large-scale lifeline networks.
      
Numerical modeling demonstrates that architectures of this kind are promising for acceleration of decoding in the digital communication systems.
      
The effectiveness of the suggested control law is shown with the aid of numerical modeling.
      
The problem of numerical modeling consisted in the construction of a system for the prediction of a change in the Gibbs free energy (Δ G) in the course of the formation of protein-protein and protein-ligand complexes.
      
Results of a numerical modeling experiment are given.
      
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By combining a numerical model, a measurement equation and the Kalman filter, the optimal estimates of the state variable (contaminant concentration) of the convective-dispersive equation can be obtained. A numerical example of contaminant transport in a two-dimensional groundwater flow was given and the results show significant improvement in the estimated concentration distribution by using the filtering technique.

对流扩散方程的有限元和有限差方法已经广泛地用来模拟地下水污染物的迁移。由于迁移过程固有的不确定性,模拟方法的不准确性等都会给模型计算带来偏差;另外野外测量的误差也是不可避免的。通过数值模型、量测方程和卡尔曼滤波的结合,作为状态变量的污染物浓度可以优化给出。本文以二维地下水污染物的对流扩散方程为例,应用有限元方法导出卡尔曼滤波的转移矩阵,结果表明,使用滤波技术来估算地下水可溶性污染物浓度的分布比单独使用有限元方法有较大的优越性。

The model UMERGE,one of the computer models for evaluating initial mixing of municipal ocean discharge developed by the U.S.EPA,is used as an instance to optimize diffuser port con- figuration of the Zhuyuan Outfall for Shanghai Combined Sewerage Project Stage I.Plumes from submerged sewage discharge were computed under various conditions based on the regime of the Chang Jiang estuary.Having taken account of the boundary constraints both of the river-bed and water surface in initial dilution process of the effluent,slightly...

The model UMERGE,one of the computer models for evaluating initial mixing of municipal ocean discharge developed by the U.S.EPA,is used as an instance to optimize diffuser port con- figuration of the Zhuyuan Outfall for Shanghai Combined Sewerage Project Stage I.Plumes from submerged sewage discharge were computed under various conditions based on the regime of the Chang Jiang estuary.Having taken account of the boundary constraints both of the river-bed and water surface in initial dilution process of the effluent,slightly upward port orientation at an angle of a little higher than 10° from the horizontal was recommended.Some points about applicability of the model were finally discussed.

美国国家环保署开发的用于城市污水海洋排放初始混和特性模拟的数值模型之一UMERGE,作为实例,应用于上海市合流污水治理工程第一期长江口竹园排放口的扩散喷口设计优化。根据长江口的特点,计算各种条件下污水排放的羽流扩散。考虑到污水初始稀释阶段对河流底部和水面的环境影响,推荐喷口仰角稍大于10°。文中并就该模型的适用性作了讨论。

By the principle, way and method of experimental ecology and ecolog-ical kinetics and ecological climatology, we make researches on the mach-anism and succession changes of artificial eco-system protection in the steppe desert area with a precipitation of about 180mm. The precipitation isa main replenishment sources for plant growth in this area. Since 1980s,the precipitation is reduced, the rainfall distribution is tend to be evenin a year. It is relatively speaking that the effectiveness of precipitationto...

By the principle, way and method of experimental ecology and ecolog-ical kinetics and ecological climatology, we make researches on the mach-anism and succession changes of artificial eco-system protection in the steppe desert area with a precipitation of about 180mm. The precipitation isa main replenishment sources for plant growth in this area. Since 1980s,the precipitation is reduced, the rainfall distribution is tend to be evenin a year. It is relatively speaking that the effectiveness of precipitationto the plant is increased. The shifting sand dune and initial-stage fixed dune are as a halfclosed system. Because of the bio-crust development on the dune surfacein the long-time fixed-dune area, the plant cosumes the water in the sanddune, which makes the water tend to be exhausted. Therefore, it presentsa closed system. The plant for sand fixation, microclimate and sandy landmoisture are formed a complex circle system. We have set up a data modelon the basis of analysis of the relations among shifting sand, moisturedynamic, relative air-humidity, temperature, precipitation, bio-crust,total vegetation coverage and so on. The condensed water covers two processes of molecular absorbtion andthermodynamics. The micro-climatic factors influences and limits the pro-cess of absorbing condensation, participating and conditioning the thermo-dynamics process from different vetor direction. The water surface evapor-ation contents three essential factors of temperature, relative humidity andwind velocity.The data model establishment can show the way and intensityof its influences.

运用实验生态和生态动力学,生态气候学的原理、途径和方法,研究在降水180毫米左右的草原化荒漠地区,依天然降水建立人工生态防护体系机理、演替变化。大气降水是本区植物繁衍的主要补给源。自八十年代以来降水有减少趋势,但年内分配趋于均匀,相对来说提高了降水对植物补给的有效性。流动沙丘和固沙初期沙丘体为一半封闭系统;在固沙年代较久的地区,由于沙丘表面生物结皮的发展,植物生长消耗了沙丘体内的贮持水量,沙体水分枯竭呈一封闭系统。固沙植物、微气候和沙地水分间形成一复杂的循环系统。据对流沙、1964和1981年固沙地水分动态与空气相对湿度、气温、降水、生物结皮、植被总盖度等关系分析,建立了数值模型。吸湿凝结水包含着分子吸湿和热力学二个过程,微气候因子影响并制约着吸湿凝结的过程和数量,它们从不同矢量方向参与和制约着热动力学过程。水面蒸发它包含了温度,相对湿度和风速三个要素,建立数值模型可揭示其影响的方式和强度。

 
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