乘

They came anyhow they could—by boat, train, or plane.

他们是以各种方式来的--乘船、乘火车或乘飞机

They came anyhow they could梑y boat, train, or plane.

他们是以各种方式来的－－乘船、乘火车或乘飞机

According to current smelting process and production data,the method for predicting end-point phosphorus content of BOF was investigated.

根据现场的冶炼工艺和生产数据，研究了转炉冶炼终点磷的预报方法；采用机理模型和偏最小二乘模型分析了终点磷的影响因素；建立了基于偏最小二乘回归的转炉终点磷的预报模型。

It included buffalo riding, bucking bronc riding, steer roping, and horse racing.

它的节目包括了野牛骑乘、无鞍野马骑乘、套小牛及马赛。

We can go by tube or we can catch a bus.

我们可以乘地铁或乘公共汽车。

Do you want to go there by bus or by tube ?

警察：你想乘公共汽车，还是乘tube去那儿呢？

The performance function and constraint equation in calculus of variations were constructed by analyzing input and output equations of the system containing parameters to be estimated. The traditional parameter estimation problem could be transformed to that of least squares estimation.

通过分析包含待估参数的系统输入输出方程，构造变分法中的性能范函和约束方程，将传统的参数估计问题化为带约束条件的最小二乘估计问题；利用拉格朗日乘子法，分析参数估计方程，得到参数的最优估计。

Two methods of discretization, collocation method and Galerkin method, have been dominant in existing meshless methods.

在最小二乘法和移动最小二乘近似的基础上提出了加权最小二乘无网格法。

By utilizing the complex multiplication property of the curves and using a modulo reduction and Frobenius expansion technique, it is shown that there is a fast point multiplication method without precomputation on the curves, which is 6 times faster than the ordinary repeated-double-add method.

结果显示，利用这类曲线的复乘性质，使用模约减和Frobenius展开技巧，这类曲线上存在一种不带预计算的快速点乘算法，其运算速度是通常的重复加倍-点加算法的6倍。

Firstly, this paper investigated roundly the basic theory of the ambient vibration method, analyzed systematically the main methods of ambient vibration identification, and discussed their advantages and disadvantages. Then we established the finite element model of structural dynamics and test model and analyzed their mutual relation, improved MUSIC method and correlation function method in the harmonic identification, and gave the subspace method and correlation function method based on continuous model, which is multi-harmonic retrieve technique. And then, this paper also puts forward least-squares method to estimate directly structural physical and modal parameters; this approach replaced the derivative operator in the continuous time model with an equivalent approximation, and estimated the physical parameters of structures by the least-squares method. And then, we discussed the approximation methods of derivative and their convergence. Finally, this paper researched the modal parameters of a frame structure by the simulation and test. The results demonstrated that subspace method, correlation function method and the least-squares method are effective and stable respectively.

全面地研究环境振动识别方法的基本理论，系统地分析环境振动识别方法的主要方法，讨论它们的优点和不足；建立结(来源：6666AB44C论文网www.abclunwen.com)构动力学的有限元模型和试验模型，分析有限元模型与试验模型之间的相互关系；改进谐波识别中的MUSIC识别方法和相关函数识别方法，给出大型结构模态识别的连续型的子空间分解识别方法和相关函数识别方法，这个方法是多元谐波识别方法；提出直接识别结构的物理参数和模态参数的最小二乘方法，这个方法利用导数的近似值代替导数值，并运用最小二乘方法识别结构的物理参数，讨论导数近似值的选择方法，分析算法的收敛性；通过仿真计算和模型实验，研究高层框架结构的模态参数识别，验证子空间分解识别方法、相关函数识别方法和最小二乘识别方法的有效性，算法的稳定性；从理论和试验两个方面分析和研究噪声对识别精度的影响，影响识别精度的因素，以及部分模态成分的模态参数不能够被识别的原因。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。