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The theoretical analysis and computer simulations demonstrate that the method is an unbiased estimator and its estimation precision is superior to the sliding correlator.

理论分析和仿真实验结果表明，时延估计的频域处理方法是一种无偏估计，且其估计精度远远高于滑动相关方法。

Numerical simulations were done for a bistable latch valve of the system by FLUENT, and three groups of datum for different fluids were obtained with the same effective exit sectional area. Besides, a static mathematic model for the electromagnetic valve was established based on the obtained datum. Secondly, the motion of the valve spool was realized by UDF file in FLUENT. Three kinds of motions, uniform, acceleration and motion driven by the coupling effect of the liquid resistance and the electromagnetic force, were calculated and compared. The dynamic characteristic of the electromagnetic valve was obtained by analyzing the relationship of the mass flow rate of the inside flow field of the electromagnetic valve, the change of the drop pressure of the passageway of the valve, and motion time.

并针对系统中的某双稳态电磁阀，使用商用CFD软件FLUENT对其进行内部流场的数值模拟，通过使用不同流体介质，不改变阀门有效出口截面积的情况下，分析得到的三组数据，建立了该电磁阀的静态数学模型；通过编写UDF文件，实现对阀芯运动方程的控制，在阀门做由闭合到开启、开启到闭合运动时，控制阀芯分别做匀速运动、匀加速运动以及阀芯受到液体阻力与电磁力作用力的耦合力的运动，分析了三种工况下电磁阀内部流场质量流率和阀门出口入口压降的变化以及运动时间，从而得到该电磁阀的动态特性。

All signals of the closed-loop system are proved to be semi-globally uniformly ultimately bounded under the proposed control, while the effectiveness of the proposed control is illustrated by simulations.

证明了所提出的控制方法能够保证闭环系统的所有信号半全局一致最终有界，并通过仿真验证了该方法的有效性。

All simulations based on unimodal hydraulic functions underestimated the mean observed drainage.

All 仿真建立在单峰的与水有关的功能的基础上的收集的水分内容侧面低估卑鄙注意到排水。

There are not relations between the design complexity and number of parallel units, and it is easy to equalize the DC current of different unit through vector group changing. Simulations and experiments prove that the present technique is right and effective.

该调制方法不仅保持了传统SVPWM技术的所有优点，且实现简单，其控制策略的复杂程度与并联单元的数目无关，仿真和试验验证了方法的正确性和有效性。

The comparison of the simulations of the same perturbation in 2D and 3D shows that both are similar before the perturbation arrives at 7 solar radii, and that both have the observed three parts of the classical CMEs. However, the reflecting effect of the adopted boundary conditions at both poles in the 3D simulation has a significant effect on the simulation of more hours, and causes unphysical changes in the polar region, such as the enhancement of density and the change of the magnetic field topology.

从对相同扰动的二维和三维模拟结果的对比来看，在扰动到达7个太阳半径之前，模拟结果相似，都可以模拟出CMEs事件的三部分观测特征，但是三维模拟采用的两极边界条件存在的反射效应，对更长时间的模拟有明显的影响，在两极产生密度增强和磁场位形发生较大变化两个非物理扰动。

In this paper, we firstly make some qualitative analysis to Lorenz critical chaotic system, and then lead it to the corresponding unstable equilibrium point and periodic orbits in terms of the linear state feedback approach. Then we make a lot of simulations which indicate this method to be feasible. Fractional-order system, as well as Lyapunov exponent, has been used as a powerful tool for the quantitative study of chaotic systems.

本文首先对Lorenz临界混沌系统进行基本定性分析，然后利用线性状态反馈方法将其制到相应的不稳定的平衡点与周期轨道上来，并证明了被控制的Lorenz临界系统是全局渐进稳定的，并对取得的结果作了大量的数值模拟，模拟结果证实该控制方法简单有效可行。

These data may be useful in unsteady simulations.

这些数据可用与不稳定的模拟计算中。

With different explicit schemes , the simulations reveal different results of the minimum central pressure , the maximum surface winds , the updrafts of eye wall and microphysical fields .

然而不同的显式过程模拟的的云物理量场不尽相同，引起不同的潜热释放，模拟的动力场，台风眼半径，台风壁上升气流强度，台风眼最低气压和地面最大风速等存在明显的差别。

Simulations are presented to demonstrate that the proposed method is robust to uplink frequency offset cancellation.

与传统的算法相比，此算法无需获得子载波频偏范围的先验知识。

There had been a moment during the breakfast meeting, though, after the backslapping and the small talk and when all of us were seated, with Vice President Cheney eating his eggs Benedict impassively and Karl Rove at the far end of the table discreetly checking his BlackBerry, that I witnessed a different side of the man.

那次早餐会期间，在表示过关心和寒暄以后，我们所有人坐了下来，我注意观察了一下，副总统切尼面无表情地吃着班尼迪克蛋（Eggs benedict，源自美国，以英式松饼、火腿、水煮蛋以及荷兰酱组合而成），卡尔。罗夫在餐桌的远端谨慎地经常查看他的黑莓手机，我目睹了他所不为人知的一面。

Talk Undelete failed; someone else may have undeleted the page first.

Talk 无法删除选定的页面或图像（它可能已经被其他人删除了）。