The composition of exchangeable cation and the soil nutrient content can be used as the indexes to evaluate soil chemical fertility evolution, especially the former is more important.

Effects of Simulated Acid Rain on Exchangeable Cation Transplant and Acidifying Potential in Litchi Orchard Soils

模拟酸雨对果园土壤交换性阳离子迁移及其对土壤酸化的影响

After the key column fails, the internal force is redistributed by the catenary action of the joints to prevent the progressive collapse of structures, while the joints are under the state of bending moment combined with tensional force.

结构体系中当关键柱破坏后，体系将通过节点的悬索作用实现内力的重新分配，防止结构出现连续倒塌，此时节点将承受弯矩和拉力的共同作用。

When the beam undergoes a large deformation, compression force then quickly changes into tension force which supports the beam and reduces further deformation, that is to say, catenary action takes place.

钢梁进入大变形阶段后，轴向约束压力变为轴向约束拉力，轴向拉力有阻止钢梁自身进一步变形的作用，即发生了悬链线作用。

This paper investigates the large deflection behaviour of steel beams under fire conditions taking into consideration the effect of catenary action provided by the surrounding structures.

为了研究高温下钢梁的大变形性能，本文使用ABAQUS有限元程序建立了分析模型。

The fire resistant capacity is enhanced a lot when considering the catenary action of the steel beam.

处于整体结构中的梁的破坏形态与单个构件的梁的破坏形态有较大差别，当考虑梁的悬链线效应时其抗火承载力明显提高。

The cable curves at cable finish stage, which utilizes equal rise of the quadric curve or the catenary curve, bring little difference to static and dynamic behaviors of suspension bridges.

对于空缆状态下的主缆线形，采用矢高相等的二次抛物线型还是采用悬链线线型，对悬索桥的静动力行为产生的差异不大；

The upper-structure of bridge employs catenary curve non-hinge arch.

桥梁上部结构形式定为悬链线无铰拱。

Frequency number error and support condition of flexible cable tension Computation of the Length of Flexible Cable of Catenary Curve

柔索索力主频阶次误差及支承条件误差悬链线柔索索长的计算

The dynamic performance of simple catenary, stitched simple catenary and heavy compound catenary, the determination of interval between two pantographs and the optimization of pantograph catenary structure parameters have been studied with this software.

此外，还应用此软件对双弓牵引间距的确定以及弓网结构参数优化方面进行了研究，并取得了理想的结果。

The dynamic performance of simple catenary, stitched simple catenary, and heavy compound catenary have been studied and compared by using this software.

应用此软件分析了简单链形悬挂、弹性链形悬挂以及双链形悬挂的振动特性，并进行了相互间的比较分析。

Experimental research and simplified calculation of natural frequencies of prismatic catenary fixed arch

等截面悬链线无铰拱固有频率的试验研究与简化计算

Geometric nonlinearity adopt total lagrangian formulation, deduce double nonlinearity stability control equations of initial geometrical imperfections catenary arch, with corresponding programs complied in Matlab.

几何非线性采用总体拉格朗日列式法，在此基础上引入材料非线性的影响推导了初始几何缺陷悬链线拱的双重非线性稳定承载力控制方程。用Matlab编程进行了计算分析。

The distribution of vertical stress between the walls and the coefficients of lateral earth pressure according to catenary arch were compared with that according to circular arch.

最后通过算例分析了土拱效应对土压力计算结果的影响。

This paper states a method of analyzing the right catenary arch with variable cross section on slop.

对正拱斜置变截面悬链线坡拱桥的受力分析方法作了介绍。

A differential method for critical pressure of constant section catenary arch with two hinges

双铰等截面悬链线拱面内屈曲临界推力的差分解法

Inner Force Analysis of Right Catenary Arch with Variable Cross section on Slop

正拱斜置变截面悬链线坡拱桥的受力分析

Measuring and testing technique of catenary arch bridge with reinforced concrete slabs

悬链线钢筋混凝土板拱桥测试技术

The multi-pantograph current collection is a kind of mechanical vibration with multi-movable vibration sources, and these vibration sources together with the catenary compose a complex vibration system.

多弓受流是一个多移动振动源的机械振动，这些振动源和接触网一起组成一个复杂的振动系统。

Research on high speed train pantograph/ catenary contact under control with differential geometry theory

基于微分几何理论的高速列车弓网接触控制研究

This catenary control sys-tem is universal and transplantable.

该垂度控制系统具有通用性和可移植性。