误差估计

When corrected azimuths are used to locate, estimator will incline ultimately to actual value with tiny error.

示向度值经多次修正后用于定位，估计值最终以很小的误差趋向于真实值。

Moreover, with the directedinterconnection topologies described by digraphs, the leader-following errors are estimated.

当多主体系统的耦合拓扑是固定的或切换的有向图时，跟随者与领导者之间的跟踪误差得到了估计。

Cyrus Harding announced this result to his companions, and taking intoconsideration errors of observation, as he had done for the latitude, hebelieved he could positively affirm that the position of Lincoln Island wasbetween the thirty-fifth and the thirty-seventh parallel, and between thehundred and fiftieth and the hundred and fifty-fifth meridian to the westof the meridian of Greenwich.

赛勒斯·史密斯向伙伴们宣布了这个结果，同时，也象计算纬度时一样，估计了观察时可能发生的误差。他相信他可以肯定林肯岛的位置在纬度35度到40度之间，经度在格林威治子午线以西150到155度之间。

Based on this idea,a new method of no-reference objectively assessing image quality is presented.The DCT coefficients of the ac component can be approximated as a Laplacian distribution.

假设图像的DCT系数是Laplacian分布，首先根据JPEG图像的DCT系数估计出图压缩前的DCT系数分布参数，并由此估算出图像压缩前、后DCT系数的均方误差值。

Simulation results show that the blind MMSE equalizer has smaller mean-square error of symbol estimation than the corresponding zero-forcing equalizer.

仿真结果表明，该均衡器比基于线性预测的盲置零均衡器有更小的符号估计均方误差。

The proposed scheme minimizes a simple function relevant to the mean-square error of the least squares channel estimate instead of minimizing the MSE itself.

所提方法最小化的是一个与信道最小二乘估计均方误差有关的函数，而不是MSE本身。

According to the principle of best linear unbiased estimation ,A target localization algorithm for bistatic radar was proposed by pseudo measuring value after coordinate conversion.

利用坐标转换后的伪测量值，根据最佳线性无偏估计原理，提出一种双基地雷达目标的定位方法并给出了算法定位误差的Cramer-Rao理论下限表达式，在不同噪声条件下对算法进行仿真计算，结果表明该方法可以显著提高双基地雷达目标的定位精度，其理论下限和仿真结果都明显优于最小二乘方法。

In addition, the smooth pseudo Wigner-Vile distribution, instead of the direct WVD, could reduce or remove the cross-terms interfere.

在较低信噪比条件下，经过SPWVD变换后信号能量将偏离信号的瞬时频率所在处，给频率估计带来有偏误差。

First the dual-body satellite model is established and the control laws of reaction wheel are designed. Based on this the extended Kalman filter estimators with attitude sensor updated by star tracker are designed to provide error corrections for the pseudo-gyro and inertial gyro.

首先建立了双体卫星模型，并设计了动量轮控制律，在此基础上根据星敏感器的测量信息，应用广义卡尔曼滤波器来估计姿态和角速率漂移误差，进而对伪陀螺和惯性陀螺进行校正。

Based on the forenamed theory, Estimated the Total Electron Content including the second-order ionospheric error. Established the 2°×2° geomagnetic vector grid-model over mostly area of China , then processed some dual-frequency data to indicate the algorithm is feasible and correct. Obtained some useful conclusion after analyzing the result of data processing.

本文计算了基于中心电离层单层模型的覆盖中国区域的2°×2°地磁场格网点的矢量值，对计算结果的X、Y、Z三个方向分量进行二次曲面拟合，对两种考虑地磁场影响计算包含电离层延迟误差二阶项的TEC估计结果进行了计算，验证了拟合模型的正确性和可行性，并对试算结果进行了分析，得到了一些有益的结论。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。