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Secondly,traditional calculation theory on configuration of main cable of cable suspension bridge was introduced such as parabola theory,segmental catenary curve method,segmental parabola method and segmental line method.At last,two calculation theories on the stability of bridge was put forth.

具体内容如下:(1)首先分析了影响自锚式悬索桥非线性的几种因素,然后介绍了悬索桥的传统线形计算理论——抛物线理论、悬索桥主缆线形计算的精确方法——分段悬链线方法以及分段抛物线法和分段直线法,最后介绍了桥梁稳定性计算的两种计算理论。

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。

This paper introduces three traditional ways which are use coefficient lumimethod, power to square ratio method, inverse square law to do the lamination calculation for the representative room and deck, and do some contrast for the room which can use two way to do the calculation .

本文采用传统的三种照度计算方法:利用系数法、比功率法、逐点法对相应典型舱室和甲板进行了照度计算,对一些可以用两种方法计算的舱室的计算结果作比较并分析了原因。

The objective of this study is aimed at the implementation of parallelized numerical quadrature routines. The algorithm we choose for numerical quadrature routines is the so called "Adaptive Romberg Tree integration scheme"(abbr."ARTint") proposed by Lin et. al.[1997]. This numerical quadrature scheme can arrange the function evaluation points adaptively in accordance with characteristic of the trend of variation in integrand function values. When the accuracy of the numerical quadrature value is requested to be increased, a newer and larger set of function evaluation points must be incurred. The main advantage of ARTint method is the inclusion of all function evaluation points used in previous stages. It is this feature of ARTint method that makes it a quadratue scheme with prominent computation efficiency.

本研究在探讨数值积分程式之平行化,所使用的演算法为林聪悟与林佳慧[1997]一书所提出的「Romberg树自动布点数值积分」架构,此一数值积分方法能以适应被积函数值变化情形方式自动安排积分点来进行数值求积计算,在提高阶数以获得更高精度积分值的过程中,此一方法只须再计算新增加积分点的函数值,搭配先前已计算过的函数值的重覆运用即可获得更精确的数值积分估计值,如此将能减少升阶过程中函数求值计算的次数,有效率地完成单重积分的数值计算。

First of all, the physical properties of plastic projectile body influencing the motion of pro- jectile are analysed in this paper which depends on the test results.

本文以实验结果为依据,首先分析了塑料弹体影响弹丸膛内运动的物理性能,然后结合旋转弹丸的膛内运动特征,经过模拟试验,采用数学拟合法,初步建立旋转稳定弹塑料弹体工程设计计算的数学模型(包括结构尺寸设计计算、强度计算和内弹道计算)。

Some efforts were made to improve the computational efficiency of the mold filling simulation of die casting process. To speed up the convergence of the pressure field and speed field, the SOLA method was modified and a dynamic iteration direction method was put forward.

通过对SOLA算法中迭代方法的改进和采用"动态迭代方向"法,加速了流场计算的迭代收敛速度;通过引进"瞬态层"概念,大大简化了流场耦合温度场计算时的计算规模,提高了计算效率。

Chapter 4 of this dissertation has carried out a physical simulation study about the processes of formation and laws of evolution of the fan delta in Baimiao gas field. Based on the results of the study about the geological background in this area, this paper has discussed about the sedimentation facies marks for the fan delta in Baimiao gas field, worked out a detailed proposal about the development of physical simulation experiment about the fan delta, and described in detail the general laws and major controlling factors governing the sedimentation processes of the fan delta. A detailed measurement was made about the experimental results, and a systematic comparison was made relative to the prototypic characteristics. Based on the observation and description about the experimental processes and the analyses about the experimental results, this paper has give

在本章中,指出了数值模拟研究的基本特点,给出了扇三角洲形成过程的基本控制方程和数学解法:在此基础上设计和开发了扇三角洲形回成过程的平面二维数值模拟软件,并对计算过程中所遇到的主要问题一计算速度较慢开展研究,对比了以天、旬、月为时间单元进行汁算对沉积结果的影响,研究认为,在流量无突变的情况下,可以适当增长计算的时间步长和适当放松精度要求;根据白庙气田扇三角洲的基本地质特征设计了数值模拟计算的基本条件,以月为单位,计算了扇三角洲四百年的形成过程及演化规律,并以50年为单位输出沉积结果;本章最后还对数值模拟方法及结果进行了讨论。

The principle of programming is focused on easy understanding and good use. The basic calculating data of Dahuofang water diversion project is put into the program which the water hammer calculation begins.Part four, uses the advanced Bentley Hammer water hammer calculation software calculates several identical engineering conditions of Dahuofang water diversion project, and then compares the results with the results of programming calculation, and proofreads the accuracy of programming calculation.

程序编好后输进大伙房输水工程的基本计算数据就可以开始进行水锤计算。4、同时使用目前世界上比较先进的&Bentley Hammer&水锤计算软件,计算大伙房输水工程的几个相同工况,所得结果与编写程序计算的结果进行对比,对编写的程序的正确性进行校核。5、在证实了编写程序的正确性,公道性后。

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。

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。

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On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面,更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值,分为几个相等的区间作为横轴,并将各区间内所测定值依所出现的次数累积而成的面积,用柱子排起来的图形,也叫做柱状图。

You rap, you know we are not so good at rapping, huh?

你唱吧,你也知道我们并不那么擅长说唱,对吧?