系统误差

Because this method has smaller local relative errors and fast calculation efficiency,it is applicable for 2-D data with low gradient such as hypsography data and ray tracing time tables.

由于此方法具有局部误差小、计算高效的特征，可以适用于数据梯度较小的二维系统数据的曲面拟合和数据压缩，如地形高程数据和射线追踪走时表。

For the ill conditioned load flow caused by the error produced in the transformation from electricity quantities to average power, direct current load flow and sensitivity vector are presented to find out the ill node, then by adjusting the load curve and generation curve in a certain principle, which is shown in detail with several flow charts, a new operation mode is reestablished to ensure the convergence of the calculation. Optimal multiplier method is proposed to work out the least square solution according to ill conditioned structural power network. The electricity quantities flow method enhances the reliability and accuracy of the calculation of the power transmission losses.

该方法可根据当前输电网中各个变电站24小时的电量记录，利用电量潮流计算对输电网总线损和各条线路损耗进行计算，使计算的精度满足降损措施分析和指标考核的要求；并且对于由负荷出力曲线转化成平均功率计算潮流时引入的误差，进而导致潮流计算不收敛的情况，采用直流潮流法，依据相角对有功功率的灵敏度向量判断出"网络异常点"，并且给出了解决此种情况的方法流程图；针对结构病态的电力系统潮流计算不收敛的情况，运用非线性约束优化方法中的最优乘子法求解潮流方程的最小二乘解，从而解决了电量潮流法计算理论线损时的收敛性问题，增强了该方法的适用性。

In this paper, the impact of velocity parameters on dynamic performance of CMMs is studied.

重点研究了测头系统和机体结构对测量机动态误差的影响。

In Chapter 2, the optimal identification problem of the impulse response functions of SISO linear systems is investigated.

第二章首先研究了线性SISO系统脉冲响应函数的最优辨识问题，给出了在辨识误差的Cramer-Rao下界。

This paper analyzed the model error brought by the IMU, and constructed Kalman filter.

依据SINS系统的误差模型，选择了观测量并建立了标准的Kalman滤波方程。

The results of simulated analysis have proved the validity of this method. This model can be used as a compensating approach to random errors of IMU.

该模型可用于补偿惯导系统中陀螺漂移产生的随机误差，以提高制导精度。

Range of upper bound index on error state variance that is consistent with circular pole index is discussed for state estimation of a class of linear stochastic systems.

对一类连续线性随机系统的估计问题，研究了与圆形极点指标相容的误差状态方差上界指标的取值范围，从而给出直接判定方差上界指标与极点指标相容的一个充分条件。

The design of fuzzy H(subscript ∞) filter is based on T-S fuzzy model, which assures asymptotic stability and prescribed H(subscript ∞) index for the error filtering system.

模型H H滤波器的设计建立在T-S模糊模型上并能确保滤波误差系统的渐近稳定和给定的H H性能指标。

In chaotic system any initial error of measurement, however small, will grow rapidly

在混沌系统中任何计量上的初始误差，不论多么微小，都可能迅速增大并最终毁掉整个预测结果。

The integral operator is introduced such that the control system achieves a zero steady state error.

滑模面中积分算子的引入确保了闭环系统零稳态误差的性能要求。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。