平均律

An optimal control law is obtained by minimizing the average performance through spectral factorization and a practical control method for integrator and dead time plant is presented in the presence of plant uncertainty and control energy constraint.

首先基于一类随机模型误差的描述，定义了一个平均意义上的包含跟踪误差和控制能量在内的性能指标；然后通过谱分解极小化该性能指标，导出一个最优的控制律，从而为模型不确定性和控制能量约束并存条件下一类非自衡对象的最优控制问题提供了一种实用的控制方法。

The scale law and design procedure of the high power FEL are discussed.

讨论了设计高平均功率康普顿型自由电子激光装置的基本思路与相关的标度律。

To acquire the inherent topology properties and characteristics of the topology graph at AS-level, we introduce basic network model (Scale-free network and Small-world network) and evaluating parameters (such as cluster coefficient, average path length, degree distribution, Pearson correlation coefficient) in this thesis. Through thorough analysis of the topology of the generating topology at AS-level, we can see some apparent properties with the evaluating parameters and the inherent power-law distribution property of the derived topology. Besides, we discuss the perspective of the evolution of the networks topology based on these analyses.

为了研究Internet自治系统级拓扑的内在拓扑特性和规律，利用了复杂网络的基本网络模型(无标度网络和小世界网络)和度量参数(簇系数、平均路径长度、节点度分布、皮尔森系数等)，对生成的自治系统级拓扑进行了大量的分析，从中可以看出度量参数具有一些明显的特性，拓扑中具有一些幂律分布特性，并对网络拓扑的演化发展的趋势进行了探讨。

Etter of Pittsburgh tells dentists how (by using higher voltages, better filters, faster films, shorter exposures) they can cut down the total radiation used in each exposure to a piddling .1 r.

在1950年代，底特律拥有世界最高的平均收入，一个繁荣和稳定的城市，这正是通用、福特和克莱斯勒造就的。

The mean velocity distributions in turbulent boundary layers of smooth surface and two different riblet surfaces are measured with IFA300 constant-temperature anemometer in low-speed wind tunnel to validate the full development of turbulent boundary laye. Friction velocity and wall friction stress of turbulent boundary layer are obtained with the least-squares fitted curve of the sublayer velocity distribution based on Spalding formula, and virtual origin position of riblet surface can be acquired accurately.

在低速风洞中来流速度一定的情况下使用IFA300恒温热线风速仪测量了光滑表面和两种不同尺寸的脊状表面湍流边界层平均速度分布剖面，并验证了试验段湍流发展的充分性；通过应用Spalding壁面公式使用最小二乘法精准拟合了实验测量的边界层内层速度分布曲线，得到了湍流边界层壁面摩擦速度并进一步求得湍流壁面摩擦应力，较准确地计算出脊状表面的虚拟原点位置，并通过与对数律公式拟合结果比较分析，证实了该方法更加准确有效。

At the same time the buffer layer is incrassated, andthe log-law region moves upwards.

实验发现，具有减阻效果的涂料使近壁区流向平均速度增加，缓冲层增厚，对数律区上移，产生减阻效果。

The main conclusion is that the sufficient condition of BIBO robust stability for closed-loop system is the unmodelled dynamics and average parameter time-variations component are sufficiently small.

文中著重分析了自适应控制律的特性及闭环系统鲁棒稳定性，得到的结论是：如果未建模动态和平均时变充分小，则闭环系统有界输入、有界输出鲁棒稳定。

The complementary cumulative distribution and correlation of the topological structure are analyzed revealing that the network presents small-world property.

文中分析了该网络拓扑结构的补累积分布以及相关性，从其统计特性可以得出该网络具有小世界特性，揭示出结点的点权以及其邻居的平均点权之间具有正线性相关，同时结点的权重平衡度服从幂律分布。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了