形式模型

The paper is based on the rupture-dynamical theory and DNV RP-F101 recommendatory method, through the study of three corrosion models, we have built up rational estimation model, adopted subentry safety coefficient method and allowed stress method to estimate the remaining strength of corrodent pipelines, and finally, introduced the Genetic Algorithms method to compute the reliability of corrodent pipelines, gaining the reliability index, and provided corresponding program.

本文以断裂力学理论为基础，以 DNV RP-F101 腐蚀管道评估的推荐作法为蓝本，通过对管道腐蚀损伤的三种腐蚀形式具体研究，建立了合理的评估计算模型，采用了分项安全系数法和许用应力法对腐蚀管道的剩余强度进行了失效压力的计算，最后较详细的介绍了遗传算法的基本理论，并把它应用到对腐蚀管道的进行可靠性评估中，得出其可靠性指标，并给出了相应的计算程序。

We use vector space model to denote the groups interest and the returning documents into vector {(k1,V2),(k2,v2)...}, then we can calculate the similarity between them using the formula of cosine. The biggest former N pages will be pushed to group.

使用向量空间模型将用户的兴趣以及得到的文档表示成为向量形式{(k1，v2)，(k2，v2)…}，并使用夹角余弦公式计算两者之间的相似度，将相似度最大的前N篇文档推送给用户。

The OPN model of underwater counterwork system not only can depict the system's static structure and dynamic process, but can be reused.

该模型不仅可以描述不同形式的水下对抗的静态结构和动态过程，而且具有良好的可重用性。

It provided a correct and reasonable mathematical model for the analysis of the ultimate bearing capacity and crankle stability of the thin-walled structure.

论文在比较了两种运动描述方法（完全拉格朗日法和更新拉格朗日法）异同点并分析了非线性几何关系及大变形下的弹性物理关系的基础上，基于增量虚功原理推导了几何非线性空间梁元单元切线刚度矩阵，采取分模块形式，分别表示了轴力、弯矩、双力矩对几何矩阵的贡献；通过球面显式荷载增量迭代式弧长法求解方法编制程序，很好地实现了几何非线性增量荷载的自动步长选择及全过程跟踪，为薄壁杆系结构的极限承载力分析和弯扭失稳分析，提供了较为精确合理的分析力学模型。

The origin、 development and present state of the container ship2. The deformation characters and collapse mode of the container ship3. The basic theory of thin-walled structural mechanics: The bending of the thin-walled beam; The unconstrained torsion of the thin-walled member bar; The constrained torsion of the thin-walled member bar with opening; The constrained of the thin-walled member bar with closed port.4. The calculation of the warp stress in the container ship based on the thin-walled structural mechanics theoryModeling of the hull ladder calculation based on referred mechanics theories of thin-walled member bar, calculation of crankle character of the each section, such as sectional coordinates、 Free twist shear flow、 secondary shear flow、 bend shear flow and so on.

本文主要包括下述六个方面的内容： 1 集装箱船的起源、发展和现状 2 集装箱船变形特征和破坏形式 3 薄壁结构力学的基本理论◇薄壁梁的弯曲；◇薄壁杆件的自由扭转；◇开口薄壁杆件的约束扭转；◇闭口薄壁杆件的约束扭转 4 利用薄壁结构力学理论计算集装箱船的翘曲应力建立船体阶梯计算模型，利用薄壁杆件力学中相关理论，求解各断面单元的弯扭特性，包括：扇性坐标、自由扭转剪流、二次剪流、弯曲剪流等。

Based on theory of simple harmonic oscillation in physics,this paper presents a novel model for production decline prediction given by deformation of critical damping oscillation equation which is predigest.

基于物理学中的简谐振动原理，提出了把阻尼振动方程中的临界阻尼振动方程变形得到一种新的产量递减模型，可简化为Arps指数递减形式，经实例计算，可以用来预测油田产量，以此指导油田开发和管理。

Based on theory of simple harmonic oscillation in physics, this paper presents a novel model for production decline prediction given by deformation of critical damping oscillation equation which is predigested to Arps exponential decline form.

基于物理学中的简谐振动原理，提出了把阻尼振动方程中的临界阻尼振动方程变形得到一种新的产量递减模型，可简化为Arps指数递减形式，经实例计算，可以用来预测油田产量，以此指导油田开发和管理。

The model of a standard maxillary central incisor restored with cast post and porcelain crown was constructed through three dimensional finite element methods .

运用三维有限元法构建解剖标准前牙桩冠修复体模型，并模拟不同牙合接触形式进行加载以分析剩余牙本质应力。

The questionnaire concludes that the model of quantity is a cubic equation.

调查问卷的统计结果显示，我国大学受赠量模型的一般形式为三次方程式。

Using cubic spline interpolation function, we construct a finite element model to approximate the nonlinear Schr〓dinger equation, and provide a complete discrete scheme with the conservation properties of mass and energy.

本章从应用角度出发，着重讨论孤波形式的解的计算，为此我们利用三次样条函数的插值基函数构造出非线性薛定谔方程的一个有限元离散模型，给出了具有保质量与能量守恒的全离散计算格式。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新