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建立数值模型
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  a numerical model
     This paper presents an analysis method for calculatingthe utmost uplift pressure beneath dam by a numerical model based on observed data in combination with proba-bilily computation.
     通过实测资料,对坝基总扬压力建立数值模型,结合小概率法计算,对大坝在确定概率水平下的最大扬压力值进行估计。
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     In the design of applying the numerical simulation method to return roadway bolt support on working face in some mine, the author builds a numerical model that based on real condition, rules of designing numerical model and geological mechanics parameter of the regional terrain as the simulated limiting condition by geological data research in spot.
     将数值模拟方法应用到某矿工作面回风顺槽煤巷锚杆支护设计中,根据实际条件和建立数值模型的原则,通过现场地质资料调查得到区域岩层地质力学参数作为模拟边界条件,建立了数值模拟模型。
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     Based on classics Maxwell equations and the theory of diffraction integral equation is used to solve results of beam propagation when the Fresnel number of resonator is not far higher than 1.We set up a numerical model based on the Fresnel diffraction integral formula and analyzed the intensity distribution of near-field and far-field on the ring laser beam propagation direction is analyzed by using Matlab numerical simulation method.
     基于Maxwell方程组的经典理论,对于腔的菲涅耳数不满足远远大于1的条件时的光束传播问题,利用衍射积分方程理论进行求解. 根据菲涅耳—基尔霍夫衍射积分方程建立数值模型,采用matlab数值模拟的方法,对环型激光束传输方向的近场及远场强度的空间分布进行了分析.
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     Methods Build the model by 3 dimension element analysis, record the results through program SAP84 (V4.2) and do mechanics analysis.
     方法 采用三维有限元法建立数值模型,利用SAP84(V4.2)程序计算并作力学分析。
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     Experiment is done on a 125mL, four strokes, one cylinder, water cooled engine to get intake pressure’s features on different conditions.
     本文针对125mL、四冲程、单缸水冷发动机进行试验,得到不同工况下的进气压力特性。 为了仿真发动机运行工况,本文在GT-POWER仿真软件中建立数值模型,模型的准确性通过试验验证。
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     Its numerical model has been developed with the two dimensional simulator-Medici, and then, the characteristics of device have been simulated.
     在二维模拟软件Medici中建立数值模型,然后利用模拟对其特性进行研究。
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     This study uses the methods of fracture mechanics and numerical simulation, establishes the numerical models on the bases of experimental results, and the fracture behavior of brittle materials such as glass with crack under uniaxial and biaxial plane stress has been investigated by means of numerical simulation method.
     本研究利用断裂力学的研究方法,借助于统计学和现有的数值计算方法,以实验结果为基础来建立数值模型,进行了玻璃材料双向应力状态下断裂失效过程的数值模拟。
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     The simulation and research work for the oil tanker washing process is described by implementing the theory of efflux. The method of finite cell, grid plot and energy conservaiton is adopted to formmlate the numerical models of the complicated tanker washing process as well.
     基于射流理论,结合射流结构参数,利用有限单元理论和网格划分技术以及能量守恒定律,对油船洗舱作业进行仿真研究,对射流洗舱的复杂过程建立数值模型,得到射流体椭圆截面任意网格对应的壁面网格所接受流体的速度,得出舱壁任意网格油污被清洗的程度.
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     The Numerical Modeling of Bus Body
     客车车身数值模型建立
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     Sets up a CFD simulation model.
     建立了CFD模型
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     thirdly, setting up the more real geological model trough history match.
     建立地质模型
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     The Establishment of the Mathematical and Numerical Compositional Model of Three Dimensions and Four Phases
     三维四相多组分数学模型数值模型建立
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     It is very important on the numerical simulation to establish the geological model.
     地质模型建立数值模拟中至关重要。
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  a 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.
      
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 numerical model of an ion mass-spectrometer is developed based on the new type of charged-particle analyzer CAMERA suggested previously [1-3].
      
A numerical model of turbulent air flow over a curved surface is described.
      
A numerical model for the calculation of gas dynamic systems with turbulent mixing of supersonic jets is proposed.
      
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The Probability of variance of temperature field on daylighting in an inclined coal shaft is analysed and. its numerical mol del is established in this thesis. Estimate value of the variance of temperature has been got in methods of dimensional analysis and similarity theory .Numerical solution by means of numerical heat transfer leaves for us to study further in the future.

本文对斜煤井天然采光中温度场变化的可能性作了分析,建立了数值模型。用量纲分析法和相似性理论得到了温度变化的初估值、用计算传热学方法求数值解,留待后续工作中进行。

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。

This paper describes the development of a three-dimensional numerical model of dredgedsediment transport.Using a splitting method,the basic equation is splited up into four finitedifference forms.A vertical coordinate transformation is described.This transformation has theadvantages of mapping the free surface and bottom boundaries onto coordinate surfaces and allowing for a uniform vertical grid resolution throughout the modeled region. This model hasbeen applied successfully in simulation of sediment transport...

This paper describes the development of a three-dimensional numerical model of dredgedsediment transport.Using a splitting method,the basic equation is splited up into four finitedifference forms.A vertical coordinate transformation is described.This transformation has theadvantages of mapping the free surface and bottom boundaries onto coordinate surfaces and allowing for a uniform vertical grid resolution throughout the modeled region. This model hasbeen applied successfully in simulation of sediment transport caused by a harbor dredging.

本文用破开算子法对三维泥沙扩散问题建立了数值模型,对破开后的四个微分方程分别采用不同的差分格式进行计算.利用垂向坐标变换技术,使垂直方向网格划分更有利于泥沙扩散物理过程的描述,避免了底边界几何形状不规则所造成的计算复杂和不稳定,该模型应用在镇海某原油码头疏浚引起泥沙扩散对周围地区的影响上.取得有价值的成果.

 
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