数学模型

By using ideologies of logistic planning and methods of linear programming, the mathematic model of logistics distribution is established to study rock dumping scheme optimization for hypaethral mines with three-dimensional block structure.

以矿山的三维块状模型为基础，将物流规划思想和线性规划方法相结合，建立物流运输线性规划数学模型，研究露天矿山的排岩优化问题，得出在最小运输功下开采境界内所有岩块去往各排岩场的流向和流量。

In this thesis the nonlinear hysteretic model is chosen as the mathematical model of magneto-rheological lead-lag dampers.

本文选择磁流变阻尼器的非线性滞回模型作为磁流变减摆器的数学模型。

Optimalerror estimates in L2-norm and H1-norm are obtained.Model:The mathematical model for two phase incompressible flow innaturally fractured reserviors is[34]:Supposeis a bounded domain with smoothy boundary,the rock ispresented byΩi,the volume of the fissures is small,Ωm=Ω.In the fissures Ω:s(x,0)=s0,x∈Ωin the rock Ωi:where J=0,T.

模型：裂缝孔隙介质中油水两相不可压缩驱动问题的数学模型为[34]：设〓为具有光滑边界的有界凸域，其中多孔岩块以Ωi表示，Ωm＝∑Ωi，因裂缝体积很小，可以认为Ωm＝Ω。x在裂缝系统Ω上：〓s(x，0)＝s0，x∈Ω在任一岩块Ωi上：〓其中J＝0，T。

This paper establishes a multi-programming model to make a decision what a electronic company in Shenzhen need to make now. In the process, I uses LINDO software to solve and analysis the model, then the results provide the reasons that the electronic company need to decide.

本文通过建立多目标规划的数学模型来解决深圳市某电子公司现需要做出的决策问题，在实现过程中应用LINDO软件对模型进行求解并分析，为电子公司做出生产管理决策提供依据。

The ways correctness had been proved by without lord experiment, so the result is important in studying about working characteristic of lording mechanism.

通过空载实验证明本论文所建立数学模型的正确性，从而利用运动学模型模拟的工作特性具有指导意义。

Based on conventional model of flood control benefit,several kinds of uncertainties,including hydrological,hydraulic,structural,managemental and operational uncertainty,are synthetically analyzed.

在传统防洪效益计算的数学模型基础上，综合分析了水文、水流、工程施工和运行管理等多种不确定性，建立了长江中游防洪系统防洪效益的风险分析模型。

Finite Element software MPI is used for the numerical simulation of microcellular foam injection molding process.

以注射矩形薄板制品的聚合物熔体充模流动过程和泡孔长大为研究对象，把微观两相流看成宏观单相流，采用泡孔单元模型并根据流体力学基本方程建立了泡孔长大的数学模型，使用有限元软件MPI对微孔发泡注射成型工艺进行了数值模拟

Methods A Monte Carlo stochastic simulation method was developed to calculate irradiation doses of the victims with a mathematical model of adult man of MIRD,and a practical computer program for dose estimation was established.

基于MIRD的成人数学模型用蒙特卡罗随机模型方法计算事故患者的辐射剂量，并编制了一个用于此计算实用计算机程序。

However, such tidal overheight is often ignored in the current regional numerical simulation due to intensive computational requirement. Only the mean sea level is used as the fixed seaward boundary, which may wrongly predict the groundwater table position. Therefore, we aim to determine an equivalent seaward boundary through numerical modeling. The equivalent seaward boundary takes into account the tide-induced overheight effects.

然而，由于潮汐动边界处理的复杂性而导致巨大的计算量，在现有的区域地下水数学模型中，潮汐引起的海平面波动通常被忽略，仅仅以平均海平面高度作为模型的海岸边界条件，其预测出的地下水水位位置与实际情况可能会有一定的误差。

Because the model solution is one kind of NP difficult problem, we propose a new multinomial solution algorithm, and finally take online handwriting signature verification as example to confirm the mathematical model. For 150 test signatures that we choose randomly, the successful matching rate is 91.33%, the wrong reacceptance is 6% and the wrong reject rate is 2.67%.

由于模型的求解是NP困难问题，针对这种情况，提出了一种新的多项式的求解算法，以在线手写签名验证为例验证数学模型，然后对随机的150个测试签名进行检验，结果成功匹配率为91.33%，误纳率为6%，误拒率为2.67%。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。