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模拟地下水
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  simulated groundwater
     Theexperiment results showed that the temperature(20—30)℃ and the pH value(5.4—9.3)of simulated groundwater,had no effect on the determination ofdistribution coefficients on the whole,but the ratioes of solid to liquid hadremarkable effect on it.
     实验结果表明,温度在20—30℃、模拟地下水 pH 在5.4—9.3之间对测定分配系数基本没有影响,而固液比则有显著影响;
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     With simulated groundwater as leachant,the retention capabilities of the portland cement,which contains different amount of silica fume,are investigated under 25 ℃ and 42 days.
     在25℃下,通过浸出试验,用模拟地下水浸出42 d,比较不同硅灰掺量时硅酸盐水泥固化体对铀的滞留能力。
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     The leaching behavior of HLW glass by simulated groundwater and deionized water are studied by MCC-1 static method under both atmospheric and anaerobic conditions at 150 ℃ and 90 ℃ for 546 d.
     采用MCC-1静态浸出法研究了在低氧条件下,两种温度(150℃和90℃)和两种浸出剂(模拟地下水和去离子水)在浸泡546 d后对玻璃固化体浸出行为的影响。
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     Sorption of benzene homologues in simulated groundwater by HDTMA modified clays
     HDTMA改性粘土对模拟地下水中苯系物的吸附
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     Using the simulated groundwater as leaching liquid, the retention capability of U(Ⅵ) in solidification products with Portland cement,the Portland cement containing silica fume,the Portland cement containing metakaolin and the Portland cement containing fly ash was researched by leaching experiments at 25 ℃ for 42 d.
     在25℃、浸出周期为42 d条件下,实验研究用模拟地下水浸出的纯硅酸盐水泥、掺硅灰水泥、掺偏高岭土水泥和掺粉煤灰水泥的含铀固化体,比较掺入不同混合材料对硅酸盐水泥固化体滞留铀(Ⅵ)能力的影响。
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  simulated underground water
     The sorption of the long-lived fission product 129I on clay and kieselguhr in the simulated underground water was investigated by taking Na125I as tracer.
     本文以Na~(125)I为示踪剂,在模拟地下水介质条件下研究了粘土和硅藻土对长寿命裂变产物~(129)I(T_(1/2)=1.57×10~7a)的吸附规律。
短句来源
     The solubility of Np(Ⅳ) in simulated underground water and redistilled water has been measured with the variations of pH(6~12) and storage time(0~100 d) in the presence of reductants(Na 2S 2O 4, metallic Fe). All experiments are performed in a low oxygen concentration glove box containing high purity Ar(99.99 %), with an oxygen content of less than 5×10 -6 mol/mol .
     在低氧条件下以Na2 S2 O4 或铁粉作还原剂 ,测定了Np(Ⅳ )在模拟地下水和重蒸水中的溶解度 ,讨论了溶液 pH值和放置时间对Np(Ⅳ )的形态及在两种水样中溶解度的影响。
短句来源
     The leaching reaction activation energies calculated for both leaching agents indicate the simulated underground water will cause heavier corrosion to the HLW glass than the deionized water at higher temperature.
     玻璃固化体浸出反应活化能计算结果显示:在高温条件下模拟地下水对玻璃固化体腐蚀比去离子水严重。
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  “模拟地下水”译为未确定词的双语例句
     For accurately simulating the interaction of seepage field and stress field, this thesis adopts the coupled analysis to simulate the deformation in excavation.
     为了更好的模拟地下水渗流场和应力场的相互作用,本文采用了耦合计算分析的方法,通过应力~渗流场耦合有限元计算分析内撑式深基坑的开挖变形问题,得出了对基坑开挖变形行为的渗流的影响方式。
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     Stress corrosion cracking (SCC) of X70 pipeline steel in Na2CO3/NaHCO3 solution and in simulating ground water (NS4 and NOVA) has been investigated in this paper. The possibility of applying the Metal Magnetic Test (MMT) in detection of SCC in buried pipeline was also discussed.
     本论文主要研究了X70钢在Na2CO3/NaHCO3溶液和模拟地下水溶液这两类介质中的应力腐蚀破裂行为(SCC),并探讨了金属磁记忆检测技术应用在埋地管线钢SCC监检测的可能性。
短句来源
     Geostatistical methods, such as the trend analysis and kriging methods, were used to simulate the distribution of contaminants in groundwater. The grey system method and characteristic finite element solution of the advective-dispersive equation were adopted to forecast pollution in the future.
     本文研究了主要的污染源及其污染途径,地下水中主要污染成分及其空间分布特征,用模糊数学方法进行地下水的水质评价,用地质统计学中的趋势面分析方法和Kriging方法模拟地下水中污染组分的空间分布,用灰色系统方法和对流弥散方程的特征有限元解进行地下水污染的预测。
短句来源
     Study on the removal of manganese in ground water with mixed oxidation
     混合氧化法对模拟地下水中锰的去除研究
短句来源
     The Mn2+ in imitated ground water was treated by adding proper potassium permanganate and then aerating.
     采用在水中投加适量高锰酸钾并同时曝气的混合方法,来处理模拟地下水中的Mn2+.
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  simulated groundwater
Solubility of mixed-valence U(IV-VI) and Np(IV-V) hydroxides in simulated groundwater and 0.1 M NaClO4 solutions
      
In sorption from simulated groundwater (pH 8.3), the surface distribution coefficient in surface sorption Ka was determined to be 8-37 and 4-80 cm for Am and Pu, respectively.
      
In order to investigate the feasibility of preparation and stabilisation of simulated groundwater samples, various tests were necessary prior to the production of a large batch of candidate reference materials.
      
This paper presents the preparation of simulated groundwater reference materials and the different stabilisation procedures tested.
      
The bioreporting efficacy of alginate/SrCl2-immobilized HK44 was investigated in simulated groundwater with different pH?regimes.
      
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  groundwater modeling
Next, the calibration results were evaluated statistically, and visually by a groundwater modeling review committee, to determine if the model accurately represented groundwater flow at the site.
      
Groundwater modeling applied to production well management in a contaminated aquifer
      
Development of groundwater modeling for the Azraq Basin, Jordan
      
Groundwater modeling was proposed to be used for the re-estimation of utilizable groundwater amounts in the catchment.
      
This GIS-based hydrogeological database has become a useful tool for groundwater management purposes and to provide the input for groundwater modeling.
      
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This paper develops a efficient and practical numerical method for simulating the contaminant movement in groundwater. It couples the groundwater flow equation with the solute-transport equation. the discrete systems of both equations are derived from their integration forms immediately.A new (?)terative procedure is used to obtain the solutions of these discrete systems. Compared with the conventional finite element methods, this method can save computer time and requisite storage efficiently. A computer program...

This paper develops a efficient and practical numerical method for simulating the contaminant movement in groundwater. It couples the groundwater flow equation with the solute-transport equation. the discrete systems of both equations are derived from their integration forms immediately.A new (?)terative procedure is used to obtain the solutions of these discrete systems. Compared with the conventional finite element methods, this method can save computer time and requisite storage efficiently. A computer program which is both general and flexible is presented. It can be applied to oneor two-dimensional problems involving steady-state or transient flow. The accuracy of this numerical model is tested with two idealized problems for which analytical solutions could be bbtalned. In both cases the agreement is nearly exact. Numerical examples that illustrat the applicability of the model are presented.

本文提出了模拟地下水中污染物运移的一种有效而实用的数值方法。它把地下水流动方程与溶质输运方程耦合在一起。这两个方程的离散方程组都是直接从它们的积分形式导出的。离散方程组的求解使用了一种新的迭代技巧。和通常的有限元方法相比,本文提出的方法可以有效地节省机器时间和所占用的内存。编制了一个灵活而通用的计算机程序,可用于承压或无压含水层中的稳定流或非稳定流问题。本数值模型的精度用两个存在解析解的理想问题进行了检验,结果相当吻合。给出了表明它能实际应用的数值例子。

The natural and generally high quality ground water may be seriously affected by many types and sources of contamination human activities and land use. Since surface water flow systems are hydraulically connected with ground water systems, surf acewater pollution can, in turn, lead to ground water pollution.This paper presents a model simulating solute transport in confined aquifer. The model is both general and flexible in that it can be applied to a wide range of problem. It is applicable to one or two-dimensional...

The natural and generally high quality ground water may be seriously affected by many types and sources of contamination human activities and land use. Since surface water flow systems are hydraulically connected with ground water systems, surf acewater pollution can, in turn, lead to ground water pollution.This paper presents a model simulating solute transport in confined aquifer. The model is both general and flexible in that it can be applied to a wide range of problem. It is applicable to one or two-dimensional problems involving steady-state or transient flow. The model computes changes in concentration of solute over time caused by the processes of convective transport, hydrodynamic disders-ion, and mixing of fluids from other sources. The model assumes that the solute is noareactive and that the gradients of fluid density, viscosity and temperature do not affect the velocity distribution. However, the aquifer may be heterogeneous and anisotropic.The model comples the ground-water flow equation with the solute-trandport equation. The model of water quality can be or will be? Solved numerically by finite element method.A listing of the microcomputer program which is written in Fortran-77 and an example of the use of this microcomputer model are included in the paper,

现代的地下水资源评价,不光要考虑水量问题,还要关心水质问题。应用微机实现大容量的水文地质计算,模拟地下水系统中的水质、水量变化规律,这是作者的初步尝试,本文提出的计算模型具有较大通用性,读者只要阅读程序使用指南,就可以解决类似的地下水污染的模拟和预报问题。

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。

 
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