查询词典 back substitution

The procedure for solving the Eqs is called back substitution.

解方程组的这一步骤叫回代。

Its encryption method is to express each of the letters in the alphabet with this character in the back of the first k-letter substitution.

它的加密方法是将明文中的每个字母用此字符在字母表中后面的第k个字母替代。

Firstly, based on natural gradient and nonlinear principal component analysis, a matrix equation is obtained by block recursive updating,and then the matrix equation is solved using QR factorization and back substitution to obtain the optimal separating matrix.

此外，结合自然梯度和非线性主分量分析提出了一种块递归的盲源分离方法，构造出按块递归更新的矩阵方程，然后用QR分解和回代法求解该矩阵方程得到最优分离矩阵。

Firstly, based on natural gradient and nonlinear principle component analysis, a matrix equation is obtained by block recursive updating, and then the matrix equation is solved by using QR factorization and back substitution to obtain the optimal separating matrix.

首先基于自然梯度和非线性主分量分析，构造出按块递归更新的矩阵方程，然后用QR分解和回代法逐块求解该矩阵方程得到最优分离矩阵。

The correct rate of back substitution of discriminating is 100%. The contents of copper, iron and magnesium of other fruits such as Chinese goosebery and guava were put into the mathematic model, and the results indicated that the mathematic model is suitable for discriminate the nature of fruits.

得到数模为Y=-10.19173X_8~(-1)。42593X_5+0.14975X_4，即100 克水果可食部中X(8铜)、X5和X4的含量代入以上方程，如果函数值在温热性区间(-0.6423171，0.5275019)，则该水果属于温热性，如果函数值在寒凉性区间(-∞，-0.6423171)或(0.5275019，+∞)，则该水果属于寒凉性。

The Schur subspace iteration method is applied for the dynamic characteristic analysis of damped structure vibration system and coupled fluid－structure system. This method avoids complex computation and has good numerical stability. A accelerated technique and a pre－process method for the system matrix are suggested to improve the computational efficiency. The generalized uncoupled equation is obtained from the Schur matrix and a back substitution scheme of response computaton is developed.

第三部分将非对称特征值问题的Schur子空间迭代法应用于非经典阻尼结构振动系统和流固耦合系统的特征值分析，建立了相应的具体算法，并给出了用以提高迭代收敛速度的迭代加速和矩阵预处理等实用技术；利用Schur矩阵的结构特点，推导了系统方程的动力解耦形式，给出了响应计算的回代求解格式。

In the predicted process, the forward simplification is used to get the interface equation, meanwhile taking the voltage of the concentrated grid as control vector to solve the control step length; in the correction process, by means of forward simplification and back substitution the Newton linearization incremental equations of both concentrated computational grid and contracted nodes are solved alternately.

进行计算时，通过前向简化形成预估环节的接口方程，同时以浓缩网络的电压为控制电压向量求出控制步长；校正环节通过双向迭代方法交替实现对浓缩网络和收缩节点的牛顿法线性增量方程的求解。

In this algorithm scheme, the multiplication of inverse matrix and a matrix is executed by the matrix triangular factor decomposition and back-substitution for the solution.

该算法保留了原方程组系数矩阵的稀疏存储方式和稀疏矩阵的运算规则，减少了计算时间和运算过程所需要的存储空间。

Our substitution was to take a right-back off and put a left-winger on, but the team reacted very well and United found it difficult to adapt to that new reality.

我们的换人是将一个后卫换下、换上一个左路边锋，但球队的反应很好而且曼联发现后来的现实让他们有点难以接受。

The right-back, a known Milan transfer target, could leave Lazio in January and there were rumours his substitution in last week's 1-0 defeat at Fiorentina was punishment for contract renegotiations going awry.

这名右后卫，众所周知的米兰的转会目标，可能在冬季离开拉齐奥。有传闻说他在上周被佛罗伦萨以1：0击败的比赛中被换下是因为在续约问题上和俱乐部没有达成一致而受到的惩罚。

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。