The method , based on the finite element theory , force - method theory , increment method and middle stiffness method , making use of the increment of curvature of the section , works out the increment of load applying and is proved in this thesis 接着，本文根据有限单元和力法原理、增量法及中点刚度理论，提出了本文暂且命名为曲率力法的非线性分析方法。该方法通过增加截面的曲率来反求框架外加荷载的增量，并在文中以试验的框架模型为例，给出了整个推导过程。
Some simple and useful methods are introduced in this paper . periodical exciting force and delayed self - controlling feedback method are used to control the above systems , and series periodic motions are achieved . the calculator simulations show that the chaos of the above system can be controlled effectively by adjusting proper controlling signals 介绍了几种简单而实用的控制混沌系统的方法，分别用参数扰动控制法、周期激振力法和延迟反馈控制法对两类系统进行了控制研究，得出一系列周期运动结果，计算机模拟表明，在适当的控制信号作用下，系统中的混沌运动得到了有效的控制。
The classical frequency - domain theory forms a basis of bridge vibration analysis , however such method has some limitations . some literatures show that the time - domain analysis method has advantages for vibration analysis . because of the research on time - domain vibration analysis developed only in recent years and the theory is n ' t perfect enough , it needs to be made further investigation 经典的简化静力法存在一定的局限性；反应谱法为中、小跨桥梁的抗震设计提供了广泛的应用，但对解决大跨度桥梁的线性与非线性问题存在明显不足；时程分析法由于该领域的研究起步较晚，目前的理论和方法还不甚成熟，有待于进一步深入研究。
The centre of the dark sector soliton evolution equation is derived by means of particle analytical method , equivalent form dark soliton ' s evolution equation in the photorefractive crystal , esceptialy between tow dark soliton ; the potential expression and it ' s numerically calculation is achieved , the conclusion is drawn : when the distance between two dark soliton = 0 , its potential function has minimum , shows there is an stead soliton in the photorefractive maternal , and interaction between two dark soliton raches biggest ; when the distance between two dark soliton 5 , its potential function is nearly equal zero , shows that the interaction between two lark soliton is very weak , nearly zero 摘要本文从光折变晶体中能得出暗孤子所满足的演化方程出发，用粒子分析力法得出了两暗孤子相互作用时，其质心间的距离所满足的演化方程，并得出了两暗孤子相互作用势函数的表达式，得到其数值解，并得出如下结论：当两暗孤子间距离= 0时，其相互作用势函数有最小值，表示在光折变晶体中有稳定的暗孤子对，并且相互作用达到最大；当两暗孤子距离5时，其相互作用势函数几乎为零，表示两暗孤子间相互作用很弱，几乎为零。
The numerical results show that the horizontal variation of response acceleration of gravity retaining wall is quite small since its lateral rigidity is large enough , the response at a given height level can be considered as the same , the maximum accelerations at different heights on the central vertical line can describe the distribution of earthquake load along the wall height in static analysis very well 数值结果显示，重力式挡土结构刚度很大，地震加速度反应在水平方向差异很小，可看作是同步的，可取中心线上各点最大加速度来描述静力法中地震作用沿高度的变化规律。在沿墙高度方向，加速度分布不是呈直线变化，比较复杂，总的变化趋势大体一致。
Suggestion the design reliability index of high - speed railway cwr dynamic stability to be settled 4 . 2 by quoting a renewal process model and first - passage failure criterion , the analysis method of cwr dynamic stability in design reference period is proposed . the reliability of high - speed railway cwr dynamic stability is analyzed . its result is compared with quasi - static analysis method and random simulation analysis method 基于反应更新过程模型和随机过程跨越理论，提出了无缝线路稳定性动力可靠度的分析方法，分析了高速铁路无缝线路稳定性动力可靠度，并与随机模拟法、拟静力法的计算结果进行了对比分析。
