迭代的

The unified discrete iterative map model of peak current and valley current controlled buck, boost, and buck-boost converters is established, and the unified piecewise smooth iterative map and their corresponding characteristics equations are also derived.

本文建立了峰值电流和谷值电流控制Buck，Boost，及Buck-Boost变换器的统一离散迭代映射模型，并导出了统一的分段光滑迭代映射方程及特征值方程，通过数值仿真得到了占空比变化时的正、逆分岔图和Lyapunov指数谱。

When the initial states are random and the reference trajectory is iteration-varying, the new AILC can achieve the pointwise convergence over a finite time interval asymptotically along the iterative learning axis.

在随机初始状态和参考轨迹迭代变化的条件下，所提出的 AILC 仍可沿迭代学习轴渐近地实现有限时间区间上的逐点收敛性。

Based on prestressed steel beams, considering effect of the method of construction to slip and stress increment, accoding to conception that procedure of calculation reflects the procedure of construction and change of structural internal force, making good use of the method of section conversion and making iteration reflect the coupling of slip and stress increment, bringing forth a method of iteration and modified stiffness to calculate the deflection of prestressed composite steel-concrete beams in normal servicing prase.

以预应力钢梁为基础，充分考虑施工方法对结构滑移和应力增量的影响，依据设计计算中反映施工过程和结构受力变化过程，通过截面换算，以循环迭代法来考虑滑移和预应力钢束的耦合作用，提出了计算预应力钢—混凝土组合梁正常使用阶段挠度变形的迭代—修正刚度法。

The simulation results show that the image-reconstruction quality and precision of this amendatory algorithm have no obvious difference compared with the primary iterative algorithm, but the image-reconstruction's speed is obviously faster so that can satisfy the request of real time flow pattern identification.

仿真结果表明，该改进的迭代算法与原迭代算法相比在图像重建质量和精度方面没有明显差距，而图像重建的速度却明显提高，满足了工业上实时流型识别的要求。

In this paper, we study the iteration method approximating zero points of m-accretive operators in reflexive Banach space. The strong convergence of the revised method is proved. These results extend and improve corresponding results of others.

文章在自反Banach空间中研究了m-增生算子的零点迭代逼近问题，证明了修正的迭代算法强收敛到m-增生算子A的一个零点，此结果推广和改进了一些相关结论。

On the base of the mathematic model of the PMSM, the reasons of the torque pulsation are analyzed. Then the validity of Iterative Learning Control in torque ripple minimization is expatiated. A whole simulation model is developed using SIMPOWER, and the effective of ILC in torque suppressing is proved. The scheme for hardware and software of integrated PMSM are demonstrated in the thesis.

本文在永磁同步电机数学模型的基础上，总结分析了永磁同步电机转矩脉动产生的原因，引入迭代学习控制抑制转矩脉动，利用SIMPOWER工具箱建立了永磁同步电机控制系统的仿真模型，对PMSM控制系统进行了仿真，仿真结果证明迭代学习控制能有效地抑制转矩脉动。

Gauss- Seidel iterative and Jacobi iteration is different-first to be calculated first, used again in the second for the right side of the ceremony, followed by analogy.

Gauss-Seidel迭代和Jacobi迭代不同的是先计算第一式得到，用此数再参与第二式的右端的计算，依次类推。

For example,,,where .2.Convergence of the iterative method: firstly I give a new upper bound for the spectral radius of iterative matrix , where is a double strictly diagonal dominant matrix.

迭代法的收敛性分析：首先给出了一般迭代阵谱半径新的上界估计，其中矩阵为双严格对角占优矩阵，是一种比严格对角占优更广泛的矩阵类。

Richardson iterative method is adopted to restore the image degraded by thick pinhole. The stopping rule of the iteration is determined by the simulation results.

针对厚针孔成像过程的空间移变性，采用Richardson迭代法进行图像复原处理，取得了满意的复原效果，并提出迭代次数的确定方法。

In SMFSIA/CAG, to increase computational efficiency in solving the matrix equation, both the speed of the iterative convergence and the matrix-vector multiplication are picked up based on iterative theory. The extended formula of the high order Taylor's series about the horizontal distance is derived. The relationship between the Taylor's series or the neighborhood distance and the efficiency of the arithmetic are analyzed.

在SMFSIA/CAG中，基于迭代法的原理，通过加快迭代收敛速度和加速矩阵向量积两个方面对该算法进行了改进，推导了关于平面展开的高阶泰勒级数展开公式，并对近场相关距离和泰勒级数展开阶数对算法效率的影响进行了分析。

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。