逼近的

In this paper, we first introduce the concepts and structures of generalized per-symmetric matrix, generalized centro-symmetric matrix or generalized bisymmetric matrix.

本文介绍了广义广对称矩阵、广义中心对称矩阵以及广义双对称矩阵的概念及结构，研究了这些特殊矩阵集合中，矩阵方程AXB=C及矩阵方程组A_1XB_1=C_1，A_2XB_2=C_2的迭代解法，同时考虑了相应的最佳逼近问题。

It consists of three parts firstly,a large number of meshing data were measured out through three dismountable teeth installed along the radial direction of rigid wheel under loading status,secondly,the experimental curves of tangential force t and of radial force r inside meshing zone were gained by means of method of mathematica...

包括三部分：首先，在载荷状态下，通过安装在刚轮径向方向上三个可装、拆的活齿，测得大量的啮合数据；其次，通过数学统计方法获得啮合区内切向力Ft和径向力Fr的实验曲线；最后，应用函数逼近法获得载荷区内载荷分布方程

The approximating error is effectively solved by using the transformation of sine and cosine functions, which is caused by the incontinuous transformation from 360° to 0°.

通过正弦和余弦函数变换的方法，有效解决了360°~0°转换不连续性引起的逼近误差，提高了估计精度，并给出了算法的具体实现步骤。

In addition, incorresponding solution set of the equation.The explicit expression of the nearest matrix to a given matrix in the Frobenius noum have been provided.

另外，研究了矩阵方程的自反矩阵解集，利用矩阵的分解，导出自反矩阵问题的最佳逼近解。

In order to keep the food supplies safe, the authors forecasted the amount of the cultivated land in future using the Lindo model, decompounded the basic farmland index using the method of entropic coefficient, selected the cultivated land into basic farmland using the method of approaching perfect point.

为保证粮食安全，运用Lindo模型预测了规划期的耕地数量，运用熵权系数法等方法进行了基本农田的指标分解，并运用逼近于理想点的方法划定基本农田。

If we almost linearize them, dealt them as linear model, the precision of non-linear fitting will be low.

得到的相关系数为0.997，从输出结果可以看出对目标的跟踪逼近是相当好的。

In experiments, two linear systems, a stable one and an unstable one, are used to test the performance of MAGA, and a comparison is made between MAGA and two recent algorithms.

实验中，利用一个稳定和一个非稳定的线性系统逼近问题来验证算法的性能，并与两种新近提出的方法作了比较。

A nevel learning algorithm of fuzzy identification for complicated dynamic systems is proposed, based on the Fuzzy Logic System .

在一类具有非线性逼近能力的模糊逻辑系统的基础上，提出了实现非线性动态系统的模糊辨识算法。

In Chapter 3,we derive the second-order-derivative-free iterations with two parameters from the third-order iterations with one parameter to approximate the roots of nondifferentiable equations in Banach space.

第三章，从带一个参数的三阶迭代族出发，构造了一族免二阶导数计值带两个参数的迭代族，用其去逼近Banach空间中非线性算子方程的解。

We take the nonlinear Klein-Gordonequation in an infinite strap and in a cylinder as examples to illustrate how to deal withnonlinear problems by using Jacobi pseudospectral methods.

Jacobi谱方法和拟谱方法数值分析理论的研究极大地丰富了现有谱方法的理论基础，同时将发展泛函分析、数值逼近论和偏微分方程数值解的相关理论。

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。