查询词典 approximate method

Then, the conclusion can be derived that local blocked clapboards can improve the uniformity of wind sent by the pipe effectively. Then, domain extension method is used to approximate the three-dimensional structure of geometrical complexity.

首次模拟了均压风道内的湍流流场，通过改变风道结构，预测了该变化对送风均匀性的影响，得到了优化方案：局部封闭隔板能够有效改善风道出风的均匀性。

Using the equation of broken line to define and substitutes for the signal transfer function, and the inverse function of approximate transfer function is obtained by way of the software method.

测量仪表由于元件参数的分散性和精度误差，使其被测物理量输入信号与输出信号间的传递函数为非线性超越函数。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。

In the fourth part, the experiment equipment is established, images are captured through CMOS, and the result of experiment is analyzed and the calibration curve is drawn, due to the non-linear characteristic of the used light-sensitive transducers calibration, the method of using piecewise linear line to approximate CMOS calibration curve is proposed, which decreased the measurement errors greatly, analyzed the measurement errors and proposed the methods of minishing errors.

第四部分搭建了实验装置，通过CMOS采集了大量的图像，分析了实验结果，做出了标定曲线，鉴于标定曲线的非线性特征，采用逐段折线逼近该标定曲线的方法，大大减小了误差，并进行了误差分析和提出了减小误差的方法。

In the fourth part, the experiment equipment is established, images are captured through CMOS, and the result of experiment is analyzed and the calibration curve is drawn, due to the non-linear characteristic of the used light-sensitive transducer's calibration, the method of using piecewise linear line to approximate CMOS calibration curve is proposed, which decreased the measurement errors greatly, analyzed the measurement errors and proposed the methods of minishing errors.

第四部分搭建了实验装置，通过CMOS采集了大量的图像，分析了实验结果，做出了标定曲线，鉴于标定曲线的非线性特征，采用逐段折线逼近该标定曲线的方法，大大减小了误差，并进行了误差分析和提出了减小误差的方法。

In a word, a new method that theoretically calculates the relativistic corrections and the fine structure of the energy levels in two-electron atom, including the atomic Hamiltonian expressed by spherical tensors, the calculation of the angular matrix elements and the summations over spin of the various interactions in the atomic Hamiltonian, and the approximate calculation of the radial matrix elements, has been provided in this thesis.

总之，本文为双电子原子能级的相对论修正和精细结构的理论计算提供了一种新的方法，包括原子哈密顿算符的球张量表示方法、原子哈密顿中各种相互作用项的角向矩阵元和自旋求和的计算方法，以及径向矩阵元的近似计算方法。

Secondly, we propose a stop criterion for an approximate solution of the inner problem.Finally,we establish the convergence theorem of the nonlinear rescaling method when this criterion is used.

然后提出了求解子问题时的终止准则，证明了在使用该准则作为子问题终止条件时非线性重新尺度化算法的收敛速度。

First the unknown signals were separated by joint approximate diagonalisation of eigen-matrices algorithm. Then the method used the smoothed pseudo Wigner-Ville distribution of each separated FH signal to estimate its transmission parameters such as hop duration, time-offset and hopping frequency pattern.

首先采用特征矩阵联合近似最优化算法分离跳频信号，再利用多窗口重叠的平滑伪Wigner-Ville分布来估计出跳频信号的跳周期、定时偏差和跳频频率等参数。

Firstly, a class of affine nonlinear systems are considered. The single-layered neural networks are used to approximate the nonlinear functions of the systems. Stable adaptive control algorithms are presented based on system states feedback and system output feedback respectively. The boundary of the tracking error is guaranteed. Then, by using the technique of input-output linearization, the stable adaptive control method for general nonlinear systems is proposed. Finally, the effectiveness of the proposed adaptive control algorithms are verified through the simulation researches for the control of robot manipulator.

首先考虑一类仿射非线性系统，利用单层神经网络去逼近系统的非线性函数，分别给出了基于系统状态反馈和输出反馈的稳定自适应控制算法，确保系统的跟踪误差有界；然后利用输入输出线性化方法，给出广义非线性系统的自适应控制方法；最后通过在机械手位置跟踪控制中的仿真研究，验证了所提方法的有效性。

Moreover, we discuss the relationship between the residual norm of the quasi-refined approximate eigenpair and that of the refined eigenpair, and the quasi-refined biorthogonalization Lanczos algorithm is given. Some numerical experiments are carried on, and the results illustrate that the newalgorithm is superior to the classic one. 2.We propose the semi-refined biorthogonalization Lanczos method which is based on the refined projection idea.

将精化投影方法的思想和拟精化思想相结合，提出了拟精化双正交Lanczos方法，建立了拟精化近似特征对和精化近似特征对对应的残量范数之间的关系，给出了拟精化双正交 Lanczos算法，并进行了数值实验，具体算例表明，该算法比双正交Lanczos算法优越； 2。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。