计算的结果
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The coordinate transformation and numerical integration was executed on the discretized tetrahedral elements based on which the 3-D MT vector-finite element method was implemented. A whole computation framework for 3-D vector-finite element method with unstructured mesh was given. Based on this some typical models were tested which has demonstrated that our algorithm could distinctively avoid problems caused by the fake solution and both the accuracy and efficiency were enhanced which made our algorithm has a bright future for further application.3. According to theory of Sobolev vector space and the discretization of Helmholtz space, the error estimate which was suitable for 3-D MT vector-finite element modeling was deduced by which the procedure of adaptive technique was guaranteed.4. Based on the fully unstructured tetrahedralization and optical strategy, the 3-D magnetotelluric h-adaptive vector-finite element method was presented through combining the error estimate. With this work, the accuracy and creditableness for 3-D MT complicatedly modeling was guaranteed.5. The 3-D magnetotelluric h-adaptive vector-finite element algorithm with unstructured mesh was implemented.
针对非结构化的四面体单元,采用坐标变换和数值积分方法,实现了MT三维矢量有限单元分析,建立起基于非结构化网格的三维MT矢量有限元计算流程,并对典型模型和国际标准电磁模型进行了数值模拟,结果对比和分析表明,基于非结构化网格的三维MT矢量有限元不仅消除了节点型有限元的伪解,而且具有很高的计算精度和速度,有广阔的应用前景。3、根据Sobolev函数的向量空间和Hemlholtz空间的分解,推导出基于残差的三维大地电磁矢量有限元后验误差估计公式,为三维大地电磁自适应矢量有限元数值模拟的实现奠定了基础。4、在完全非结构化四面体单元剖分及优化基础上,结合三维大地电磁矢量有限元后验误差估计公式,提出了基于非结构化网格的三维大地电磁h-型自适应矢量有限元计算策略,保证了对复杂大地电磁模型数值计算的精度和可靠性。5、实现了基于非结构化网格的三维大地电磁h-型自适应矢量有限元计算流程,对典型模型和国际标准电磁模型进行了数值模拟。
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Polynomial fitting was used to map out the pressure distribution curve of numerica...
与通过试验数据计算出的结果相比,数值模拟计算出来的轴向力相对误差在9%以内,而经验公式计算的轴向力相对误差为14%,采用数值模拟方法计算轴向力具有更高的精度,对多级离心泵轴向力平衡的研究具有指导意义。
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Analysis for testability is widely used in DFT and test pattern generation, but most testability analysis algorithms have the shortcoming of either inaccuracy or being too complicated. A new method to calculate the signal probabilities of the nodes in IC is pre-sented in Chapter 7 of this dissertation. The signal probabilities by our method is more exact than by the previous ones. A symbol of the signal probability at the fan-out node is created and is propagated to the RFON (Reconvergent Fan-out Nodes). At the RFON, the expression containing the symbol is simplified using the rule which corresponds to the law of identity in Boolean algebra. After the expression is simplified, the symbol is substituted with its numeric value. Theoretical analysis shows that this method is concise and has a low computing complexity.
可测试性分析在可测试性设计和测试生成中都有着广泛的应用,然而大部分的可测性分析方法都存在不精确或者过于复杂的毛病,在第七章中作者提出了一种新的计算IC电路节点的信号概率值的符号算法,该算法得出的信号概率值比用以往的算法法得出的要更准确,也更简洁,针对电路中的扇出节点重汇聚现象,我们在每一个扇出节点定义了一个信号概率的符号,在以后的计算中一直使用该符号参与计算,直到该符号传播至重汇聚处,利用一定的规则把含符号的表达式化简,再将符号的真实值代入,在计算符号概率的过程中定义了一个和布尔代数中的同一律相对应的运算规则,通过该运算规则,使得信号概率的结果更加准确,符号算法具有简洁方便,计算复杂度小的特点 4。
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The code considers both transverse and longitudinal movements in the accelerators using a used 4 order variable step Runge Kutta method to calculate the beam envelope of the transverse movement, the phase oscillation curve of the longitudinal movement, the energy growth, the energy distribution at the exit, and the longitudinal electric and magnetic field distributions.
L INE- ACC/ PC程序同时考虑了加速器中的横向运动与纵向运动,运用了四阶变步长 Runge- Kutta法计算了行波电子直线加速器束流横向运动包络线、纵向运动相振荡曲线、能量增长、出口能量分布和纵向电场、磁场分布。由该程序对海关大型集装箱检测系统用加速器的 9Me V档进行调整计算,结果表明:该程序的设计结果与实际运行参数符合得很好。
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The method to calculate the rate constant of the acetic ether saponification is in this way improved in this paper.
对乙酸乙酯皂化反应实验数据处理方法进行了改进,该方法无须测定初始电导,避免了初始电导的测定误差给计算结果带来的影响对两组实验数据进行了计算,结果表明,该方法简单、易操作,并有较高的精
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The recoery rate was calculated as follows;(JOA score at follow up_preoperatie JOA score)/(17 _ preoperatie JOA score) _ 100,15 and the surgical outcomes were classified into four grades based on the calculated recoery rate; excellent: recoery rate 75% or higher, good: 50–75%, fair: 25–50%, and poor: lower than 25%. Ealuation was made on radiographic findings, including the range of motion and the jaw diameter (a measured line from the posteroinferior corner of the ertebral body to the anterior aspect of the subjacent lamina) at the adjacent leels in group A and the affected leels in group B and the spinal canal diameter at the C4 leel in both groups. The C4 leel was chosen for this measurement, because the spinal canal is usually narrowest at this leel.
恢复率如下计算;(随访JOA评分-术前JOA评分)/(17-术前JOA评分)*10015,按计算的恢复率将手术结果分4级;优:恢复率75%或更高,良:50-70%,中:25-50%,差:低于25%。X线片结果评价,包括活动范围和颌直径(从椎体下后角到下邻椎板前方的测量线)在A组相邻水平与B组受影响水平及两组C4水平椎管直径。C4作为该侧量的选择是因为通常在此平面椎管最为狭窄。
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Hazen and Sawyer computed the residence time for chlorine contact and the results from the CFD model were compared to the results of a tracer study performed on the existing tank.
哈森和索耶计算停留时间的接触和氯气的结果来计算流体力学模型进行比较的结果示踪剂进行研究对现有坦克。
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Calculation method of simply supported to continuous girder bridge is analyzed and compared with load test.
通过对预应力先简支后连续T形梁桥计算方法的研究,并与荷载试验进行对比分析,对预应力简支转连续结构设计计算的方法提出相关的建议,有利于减少计算误差,保证计算结果与实际情况相吻合。
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As an example, the method was used to determine the boundary condition during transient calculation for a power station equipped with two Francis turbines and a surge tank.
将求得的结果用于我国某电站机组甩负荷过渡过程的计算,得出了变童随时问的变化规律,计算结果与实际情况相符合。
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Based on the measure of sand geometry in M Block and comparison of results calculated with Spherical, Exponential and Gaussian Model, it is concluded that different variogram models get very different variogram range in major and minor direction.
在详细解剖M油田的砂体几何形态的基础上,对比分析球模型、指数模型和高斯模型的计算结果,3种模型计算的变差函数长变程误差15%,短变程误差25%,方向也不一样;同时运用不同模型计算的砂体体积亦有较明显的差别:砂体越发育,砂体连通性越强,不同模型计算的砂体体积相差越小;砂体越不发育,砂体连通性越差,不同模型计算的砂体体积相差越大。
- 推荐网络例句
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I will endeavour to find you some assistance.
我尽力帮你找人帮忙。
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At first I only know bruck is the idol of American younglings, afterwards I returned back to Taiwan ,even in Beijing last year ,I saw her poster everywhere, I was so surprised at her charm.
起初我只晓得布鲁克雷德丝是美国少男少女崇拜的偶像,后来回台湾,甚至去年在北京,居然也四处看见她的海报,才惊讶她的魅力之大。
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Ah may dee:You are chinese living in a democratic country.
你是居住在民主国家的中国人吧。