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Point of Contact Specify the account point of contact information.

指定账户的联系信息。

In order to deeply analyze the distribution of maximum tensile strain during asphalt surface for Semi-rigid base asphalt pavement and compound base asphalt pavement , two types of typical structure were chosen, taking the Shell designing software BISAR 3.0 as calculation tool, considering two kinds interface contact condition of complete continuousness and not incomplete continuousness, then a comprehensive analysis was made on the maximum tensile strain of every structure on the basis different interface contact condition.

摘 要：为深入分析半刚性基层沥青路面和复合式基层沥青路面面层内的最大拉应变的规律，选取两类沥青路面的典型结构，采用壳牌设计软件 BISAR 3.0为计算工具，考虑层间完全连续状态以及不完全连续两种状态，对各结构在不同的层间结合条件下沥青层最大拉应变进行了比较和分析。

A second-order symmetric fabric tensor is introduced to the model, such as the stiffness of the contact planes, the hardening parameter, the dilatant/ contractant coefficient are made dependent of the orientation of the contact plane in order to capture the inherent and stress induced anisotropic behavior of clay.

在上述考虑微结构的饱和软粘土的弹塑性本构模型的基础上将考虑组构的各向异性的二阶组构张量引入接触面上的刚度、硬化参数、剪胀系数等参数中，由此反映材料引起的各向异性和应力引起的各向异性。

It can handle the collision detection problem with multiple convex polyhedron, multiple moving objects and complex obstacles, report the geometry contact and forthcoming contact, detect the nearest Euclid distance between two objects.

多机器人虚拟生产平台的研究作为先进制造技术中一个最基本的单元和关键技术，不仅具有理论研究价值，而且虚拟生产平台是虚拟制造技术走向实用所必须解决的问题。

If an object sliding along the contact surface, the two of the contact surface of the convex part of the collision, a fracture, wear, created obstacles to the movement.

如果一个物体滑动沿接触表面来看，两者的接触面的凸角部分的碰撞，断裂，磨损，制造障碍，把运动。

Corrugation, which is one of the main behaviors of contact fatigue, is related to wear in the wheel and rail contact.

5波磨是接触疲劳的一个主要表现形式，它和摩擦过程有着密切联系。

Mechanical transmission part of the flexible joystick axis pin, cotter pin and so solid and reliable, contact the contact position in line with the external position of the handle instructions.

机械传动部分灵活，操纵杆轴销、开口销等牢固可靠，触头接触位置与外部手柄指示位置一致。

In order to solve the theoretical backlash problem of the teeth, which is crucial to the number of actual contact pairs of teeth in the research on multi teeth contact of crown gear coupling , the theoretical backlash of teeth flank with the concept of backlash angle is first time defined and described in the paper, and the minimization model of its variables is set up.

为解决鼓形齿联轴器多齿接触研究课题中的实际接触齿对数的关键技术轮齿理论间隙的问题，首次用间隙角的概念对轮齿理论间隙作了定义和描述；建立了该变量的极小化模型；对一鼓形齿联轴器作了实际优化计算，得出了鼓形齿联轴器多齿接触研究中计算实际接触齿对数所需的不同啮合状态下的最小间隙角

The complete model of locomotive and vehicle and the exact motion equations of wheel-set are established, in which, three-dimension wheel/rail contact geometry is taken into account and the Kalker's creep theory is employed to analyze the effects of the contact region of wheel/rail. An iterative procedure of solving wheel/rail creep force is proposed to improve the existed calculating method. Finally, the motion equations of vehicle with 23 DOFs are derived using the D'Alembert principle.

建立了较完善的机车车辆分析模型和较精确的轮对运动方程：考虑三维非线性轮轨接触几何关系，用Kalker蠕滑理论研究了轮轨接触区的蠕滑效应，建立了较为详细的轮对运动方程，提出用迭代法来求解轮轨蠕滑力从而对现有蠕滑力求解方法进行了改进，并采用D′Alembert原理推导了23个自由度车辆的运动方程。

The gears are assumed rigid, but at the contact gear teeth, a spring and viscose dashpot are used to simulate the effect due to the deformation of the teeth resulting from large contact forces.

有关齿轮的部分，除将其视为刚性圆盘外，於两齿轮相接触处的变形以及摩擦，则以弹簧与阻尼器模拟。

The dissecting of samples in group2 were difficult. The root of pulmonary artery and ascending aorta failed to be unfolded because fibrous tissue was tough, right and left fibrous trigone were too firm to be solved by hand. Cardiac muscle fibers couldn't be stripped along myofibrillar trajectory since they were prone to break because of their friability.

组2的心脏解剖困难，表现为纤维组织坚韧，游离肺动脉非常困难；徒手无法松解左、右纤维三角，肺动脉和主动脉根部的游离非常困难；心肌纤维坚硬、质脆，解剖时容易断离成碎块，无法沿纤维走行方向剥离。

We have battled against the odds in a province that has become increasingly violent.

我们对在一个争夺日益激烈省的可能性。