系统误差

Three point bending method is the most common one used to determine the fracture energy of concrete, for this method does not require very complicated testing machine.

在分析三点弯曲法测量混凝土断裂能误差来源的基础上，对试验机系统进行特殊设计，可以排除绝大多数误差来源。

Contour Error of linear and circular motion is caused by following error of each axis position servo system.

由于位置伺服系统跟随误差的存在，导致直线和圆弧运动时产生轮廓运动误差。

After analyzing the main error sources in the system, it discusses the error separation and error compensation of parts of the error source.

在分析了系统的主要误差源后，本论文重点研究了部分测量误差的分离补偿与修正。

Through function expansion and technique improvement of gun control system of combat vehicle, floating benchmark coordinate axis is used for system design based on the analysis of characteristic of each function error.

通过战车炮控系统功能扩充与技术改造，在分析各个功能误差特性的基础上，采用浮动基准坐标轴的系统设计，只用增加一个"数字控制器"，就可实现多项功能的综合，从而简化了系统的结构，降低了系统的成本。

The simulation results also verify that the algorithm exhibits corking robustness against the external interference and modeling errors. Ideal control effect can be achieved without changes of the algorithm and its parameters in time-delay system, non-minimum phase system, unstable object, non-linear system and MIMO system. It is so that why this algorithm has generality and is easy to use, which is favorable for the application and generalization of predictive control.

仿真结果表明基于克隆选择的免疫预测控制算法对外部干扰及建模误差具有很好的鲁棒性；并且不修改算法及算法参数就能对时滞系统、非最小相位系统、不稳定对象、非线性系统及MIMO系统等实现理想的控制效果，因而具有通用性，有利于预测控制的应用推广。

The error correction term of the vector error correction model is significant, and its coefficient has the expected negative sign, which implies that it indeed reflects an error correction mechanism that tends to bring the system closer to its long-run equilibrium.

向量误差修正模型中的误差调整项显著且其系数为负，说明具有将系统的短期波动调整到长期均衡的机制。

The calibration method can generate the sufficient calibration points with high accuracy for structured light system,which decrease error from image processing and cumulative computing according to invariance cross ratio.

该方法可以降低图像处理过程所引入的误差，减少多次交比不变计算标定点所带来的累积误差，得到多组高精度的标定点，从而提高结构光系统的标定精度。

The method of the software,hardware design and data processing of the chemical fuel tank cubage calibration system are introduced,all the error elements of this system are analyzed.

介绍了一化工燃料贮罐容积标校系统软、硬件设计原理和数据处理方法，对标校系统的各种误差成分进行了分析，并运用实际任务中的数据对贮罐标校系统的成果进行了精度验证，结果表明该系统可以提供比较精确的加注量参数。

The error sources, factors of effect on accuracy and the controllable error range of airborne laser designator are discussed, through the components of airborne laser designator in this paper.

文中通过机载激光指示器的组成分析了它的误差源、影响系统精度的因素以及其可控制的误差范围。

The system parameters are determined by optimizing an output-error cost function. To deal with the non-uniqueness of the fully parameterized state-space system, a projected gradient search algorithm is presented by restricting the update of the parameters to the tangent space to the manifold of observationally equivalent state-space systems. The sufficient condition to employ L-M algorithm for optimizing parameters is also introduced. The proposed hierarchical optimization identificationmethod includes two steps: First, the parameter search direction is determined by the proposed adaptive L-M projected gradient approach; Second, the optimum step size is computed according to a line search method.

通过极小化输出误差目标函数获得了系统参数估计；提出了正交梯度搜索方法用于解决系统参数的非唯一性问题，正交梯度搜索的本质是在输入-输出等价类相切平面的正交垂空间更新系统参数；给出了用 L-M 算法进行参数优化的充分条件；提出的系统参数递阶优化辨识方法包括两步：首先用给出的自适应 L-M 算子正交梯度方法确定参数优化方向；其次由一维搜索方法计算最佳步长。

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。