线性的

According to structural characteristics of floating slab tracks, a track segment element was taken between two adjacent fasteners. For each element, rails were regarded as Euler beams supported by discrete viscoelastic supports. The fasteners and rubber supports were replaced by a linear spring and damp. So the vibration model of the floating slab track was established. In constructing vibration model of a metro train, each car of the metro train with two suspensions was modeled as a multi-rigid body system, in which rigid bodies were connected with each other by a linear spring and damp. Combining the potential energy of vertical vibration of the track with that of the metro train, the total potential energy of vertical vibration of the train and track was obtained. And then, the matrix equation of vertical vibration of the system was established using the principle of total potential energy with stationary value in elastic system dynamics and the "set-in-right-position" rule for formulating system matrices. The vibration responses of the system can be obtained by solving the matrix equation with the direct time integration such as Wilson-θ method.

摘 要：针对浮置板式轨道结构特点，取相邻2个扣件之间的轨道为1个轨段单元，钢轨视为连续弹性点支承Euler梁，浮置板视为弹性薄板，扣件系统及橡胶支座均模拟为线性弹簧及粘滞阻尼器，建立浮置板式轨道振动模型；将城轨列车中的车辆均离散为多刚体系统，各刚体之间通过线性弹簧及粘滞阻尼器相连，建立列车振动模型；将浮置板式轨道及列车振动势能叠加，得到系统竖向振动总势能；基于弹性系统动力学总势能不变值原理及形成系统矩阵的"对号入座"法则，建立此系统竖向振动矩阵方程；采用Wilson-θ逐步积分法求解此矩阵方程，得出此系统竖向振动响应。

2Cement-soil strength with curing period of 7 days and 14 days and strength of28 days curing period are fitted in the paper. It shows that their relationship is linear and with the increasing stock-still time, the coefficient of linear relativity is trailed off.

2将龄期为7d、14d水泥土的强度与28d的强度进行拟合，发现它们呈线性关系，且随着静置时间的增加，线性相关系数逐渐变小。

First of all, a system of linearized equations was set up with respect to an atmosphere at rest, and a couple eigenvalue-eigenfunction problem was formulated, which consists of horizontal and vertical structure equations with suitable boundary conditions.

首先，建立了静止大气状态下模式的线性化系统，并在适当的边界条件下将线性化系统分解成具有垂直与水平结构方程的本征值、本征函数耦合问题。

They began with solving a system of linear equations, then present the expression of the solution by the coefficients of the system.

他们都是从线性方程组的求解入手，都是用线性方程组的系数给出解的表达式。

The signal degradation is usually modeled by a linear system. To restore the original signals from the distorted and noisy signals, we need to solve the linear system of equations.

信号退化的过程一般可用线性系统模型来表示，要从退化的信号中恢复出原始信号，必须对其线性系统的方程组进行求解。

The activation function of neuron was replaced by its first order Taylor series expansion for linearization.

训练连接权值时用一阶泰勒级数表示神经元的非线性激活函数以实现神经网络的线性化，使MLP的训练问题转化为一个线性问题。

Results show that both the trace function representation and linear complexity are independent of their order, and only depend on the values of primes p and q. Thus we have resolved the linear complexity problem of these two classes of sequences utterly.

结果表明，该类序列的迹函数表示和线性复杂度与其阶无关，只取决于素数p和q的取值，从而完全解决了该两类序列的线性复杂度问题。

As a result, the statistic feature of measurement error becomes different,and the derived rheological parameter estimation tends to be no unbiasedness and with the least variance.

钻井液流变模式的参数估计问题大多使用线性回归方法求解，然而，线性回归方法改变了测量误差的统计特征，使得所得到的流变参数估计不具有无偏性和方差最小等特点。

In Chapter 2, the Balanced LS Estimation is defined for the linear model when its error covariance is positive definite or singular. The new estimation as well as the necessary and sufficient conditions is gained for its unbiasedness, efficiency and admissibility.

第2章提出了一般线性回归模型和奇异线性回归模型平衡LS估计的概念，得到回归系数β的平衡LS估计，进而探讨了这种估计的无偏性、有效性和可容许性。

There is a kind of important problem that is solving linear systems in the computing problems of engineering, but sometimes they are unsolvable.

在工程计算问题中，有一类重要的问题就是线性方程组的求解问题，但有些线性方程组是不相容的。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。